1b886d83cSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2b5e95b48SJohn Johansen /* 3b5e95b48SJohn Johansen * AppArmor security module 4b5e95b48SJohn Johansen * 5b5e95b48SJohn Johansen * This file contains AppArmor LSM hooks. 6b5e95b48SJohn Johansen * 7b5e95b48SJohn Johansen * Copyright (C) 1998-2008 Novell/SUSE 8b5e95b48SJohn Johansen * Copyright 2009-2010 Canonical Ltd. 9b5e95b48SJohn Johansen */ 10b5e95b48SJohn Johansen 113c4ed7bdSCasey Schaufler #include <linux/lsm_hooks.h> 12b5e95b48SJohn Johansen #include <linux/moduleparam.h> 13b5e95b48SJohn Johansen #include <linux/mm.h> 14b5e95b48SJohn Johansen #include <linux/mman.h> 15b5e95b48SJohn Johansen #include <linux/mount.h> 16b5e95b48SJohn Johansen #include <linux/namei.h> 17b5e95b48SJohn Johansen #include <linux/ptrace.h> 18b5e95b48SJohn Johansen #include <linux/ctype.h> 19b5e95b48SJohn Johansen #include <linux/sysctl.h> 20b5e95b48SJohn Johansen #include <linux/audit.h> 213486740aSSerge E. Hallyn #include <linux/user_namespace.h> 22ab9f2115SMatthew Garrett #include <linux/netfilter_ipv4.h> 23ab9f2115SMatthew Garrett #include <linux/netfilter_ipv6.h> 24f4d6b94bSJon Tourville #include <linux/zstd.h> 25b5e95b48SJohn Johansen #include <net/sock.h> 26e262e32dSDavid Howells #include <uapi/linux/mount.h> 27b5e95b48SJohn Johansen 28b5e95b48SJohn Johansen #include "include/apparmor.h" 29b5e95b48SJohn Johansen #include "include/apparmorfs.h" 30b5e95b48SJohn Johansen #include "include/audit.h" 31b5e95b48SJohn Johansen #include "include/capability.h" 32d8889d49SJohn Johansen #include "include/cred.h" 33b5e95b48SJohn Johansen #include "include/file.h" 34b5e95b48SJohn Johansen #include "include/ipc.h" 3556974a6fSJohn Johansen #include "include/net.h" 36b5e95b48SJohn Johansen #include "include/path.h" 37637f688dSJohn Johansen #include "include/label.h" 38b5e95b48SJohn Johansen #include "include/policy.h" 39cff281f6SJohn Johansen #include "include/policy_ns.h" 40b5e95b48SJohn Johansen #include "include/procattr.h" 412ea3ffb7SJohn Johansen #include "include/mount.h" 42c0929212SJohn Johansen #include "include/secid.h" 43b5e95b48SJohn Johansen 44b5e95b48SJohn Johansen /* Flag indicating whether initialization completed */ 45545de8feSJohn Johansen int apparmor_initialized; 46b5e95b48SJohn Johansen 47df323337SSebastian Andrzej Siewior union aa_buffer { 48df323337SSebastian Andrzej Siewior struct list_head list; 49df323337SSebastian Andrzej Siewior char buffer[1]; 50df323337SSebastian Andrzej Siewior }; 51d4669f0bSJohn Johansen 52341c1fdaSJohn Johansen #define RESERVE_COUNT 2 53341c1fdaSJohn Johansen static int reserve_count = RESERVE_COUNT; 54341c1fdaSJohn Johansen static int buffer_count; 55341c1fdaSJohn Johansen 56df323337SSebastian Andrzej Siewior static LIST_HEAD(aa_global_buffers); 57df323337SSebastian Andrzej Siewior static DEFINE_SPINLOCK(aa_buffers_lock); 58d4669f0bSJohn Johansen 59b5e95b48SJohn Johansen /* 60b5e95b48SJohn Johansen * LSM hook functions 61b5e95b48SJohn Johansen */ 62b5e95b48SJohn Johansen 63b5e95b48SJohn Johansen /* 64d9087c49SJohn Johansen * put the associated labels 65b5e95b48SJohn Johansen */ 66b5e95b48SJohn Johansen static void apparmor_cred_free(struct cred *cred) 67b5e95b48SJohn Johansen { 68d9087c49SJohn Johansen aa_put_label(cred_label(cred)); 6969b5a44aSCasey Schaufler set_cred_label(cred, NULL); 70b5e95b48SJohn Johansen } 71b5e95b48SJohn Johansen 72b5e95b48SJohn Johansen /* 73b5e95b48SJohn Johansen * allocate the apparmor part of blank credentials 74b5e95b48SJohn Johansen */ 75b5e95b48SJohn Johansen static int apparmor_cred_alloc_blank(struct cred *cred, gfp_t gfp) 76b5e95b48SJohn Johansen { 7769b5a44aSCasey Schaufler set_cred_label(cred, NULL); 78b5e95b48SJohn Johansen return 0; 79b5e95b48SJohn Johansen } 80b5e95b48SJohn Johansen 81b5e95b48SJohn Johansen /* 82d9087c49SJohn Johansen * prepare new cred label for modification by prepare_cred block 83b5e95b48SJohn Johansen */ 84b5e95b48SJohn Johansen static int apparmor_cred_prepare(struct cred *new, const struct cred *old, 85b5e95b48SJohn Johansen gfp_t gfp) 86b5e95b48SJohn Johansen { 8769b5a44aSCasey Schaufler set_cred_label(new, aa_get_newest_label(cred_label(old))); 88b5e95b48SJohn Johansen return 0; 89b5e95b48SJohn Johansen } 90b5e95b48SJohn Johansen 91b5e95b48SJohn Johansen /* 92b5e95b48SJohn Johansen * transfer the apparmor data to a blank set of creds 93b5e95b48SJohn Johansen */ 94b5e95b48SJohn Johansen static void apparmor_cred_transfer(struct cred *new, const struct cred *old) 95b5e95b48SJohn Johansen { 9669b5a44aSCasey Schaufler set_cred_label(new, aa_get_newest_label(cred_label(old))); 97b5e95b48SJohn Johansen } 98b5e95b48SJohn Johansen 993b529a76SJohn Johansen static void apparmor_task_free(struct task_struct *task) 1003b529a76SJohn Johansen { 1013b529a76SJohn Johansen 1023b529a76SJohn Johansen aa_free_task_ctx(task_ctx(task)); 1033b529a76SJohn Johansen } 1043b529a76SJohn Johansen 1053b529a76SJohn Johansen static int apparmor_task_alloc(struct task_struct *task, 1063b529a76SJohn Johansen unsigned long clone_flags) 1073b529a76SJohn Johansen { 108f4ad8f2cSCasey Schaufler struct aa_task_ctx *new = task_ctx(task); 1093b529a76SJohn Johansen 110de62de59SJohn Johansen aa_dup_task_ctx(new, task_ctx(current)); 1113b529a76SJohn Johansen 1123b529a76SJohn Johansen return 0; 113b5e95b48SJohn Johansen } 114b5e95b48SJohn Johansen 115b5e95b48SJohn Johansen static int apparmor_ptrace_access_check(struct task_struct *child, 116b5e95b48SJohn Johansen unsigned int mode) 117b5e95b48SJohn Johansen { 118b2d09ae4SJohn Johansen struct aa_label *tracer, *tracee; 119b2d09ae4SJohn Johansen int error; 120b2d09ae4SJohn Johansen 1211f8266ffSJann Horn tracer = __begin_current_label_crit_section(); 122b2d09ae4SJohn Johansen tracee = aa_get_task_label(child); 123b2d09ae4SJohn Johansen error = aa_may_ptrace(tracer, tracee, 124338d0be4SJohn Johansen (mode & PTRACE_MODE_READ) ? AA_PTRACE_READ 125338d0be4SJohn Johansen : AA_PTRACE_TRACE); 126b2d09ae4SJohn Johansen aa_put_label(tracee); 1271f8266ffSJann Horn __end_current_label_crit_section(tracer); 128b2d09ae4SJohn Johansen 129b2d09ae4SJohn Johansen return error; 130b5e95b48SJohn Johansen } 131b5e95b48SJohn Johansen 132b5e95b48SJohn Johansen static int apparmor_ptrace_traceme(struct task_struct *parent) 133b5e95b48SJohn Johansen { 134b2d09ae4SJohn Johansen struct aa_label *tracer, *tracee; 135b2d09ae4SJohn Johansen int error; 136b2d09ae4SJohn Johansen 137ca3fde52SJann Horn tracee = __begin_current_label_crit_section(); 138b2d09ae4SJohn Johansen tracer = aa_get_task_label(parent); 139b2d09ae4SJohn Johansen error = aa_may_ptrace(tracer, tracee, AA_PTRACE_TRACE); 140b2d09ae4SJohn Johansen aa_put_label(tracer); 141ca3fde52SJann Horn __end_current_label_crit_section(tracee); 142b2d09ae4SJohn Johansen 143b2d09ae4SJohn Johansen return error; 144b5e95b48SJohn Johansen } 145b5e95b48SJohn Johansen 146b5e95b48SJohn Johansen /* Derived from security/commoncap.c:cap_capget */ 147b5e95b48SJohn Johansen static int apparmor_capget(struct task_struct *target, kernel_cap_t *effective, 148b5e95b48SJohn Johansen kernel_cap_t *inheritable, kernel_cap_t *permitted) 149b5e95b48SJohn Johansen { 150637f688dSJohn Johansen struct aa_label *label; 151b5e95b48SJohn Johansen const struct cred *cred; 152b5e95b48SJohn Johansen 153b5e95b48SJohn Johansen rcu_read_lock(); 154b5e95b48SJohn Johansen cred = __task_cred(target); 155637f688dSJohn Johansen label = aa_get_newest_cred_label(cred); 156c70c86c4SJohn Johansen 157b1d9e6b0SCasey Schaufler /* 158b1d9e6b0SCasey Schaufler * cap_capget is stacked ahead of this and will 159b1d9e6b0SCasey Schaufler * initialize effective and permitted. 160b1d9e6b0SCasey Schaufler */ 161c70c86c4SJohn Johansen if (!unconfined(label)) { 162c70c86c4SJohn Johansen struct aa_profile *profile; 163c70c86c4SJohn Johansen struct label_it i; 164c70c86c4SJohn Johansen 165c70c86c4SJohn Johansen label_for_each_confined(i, label, profile) { 1661ad22fccSJohn Johansen struct aa_ruleset *rules; 167c70c86c4SJohn Johansen if (COMPLAIN_MODE(profile)) 168c70c86c4SJohn Johansen continue; 1691ad22fccSJohn Johansen rules = list_first_entry(&profile->rules, 1701ad22fccSJohn Johansen typeof(*rules), list); 171c70c86c4SJohn Johansen *effective = cap_intersect(*effective, 1721ad22fccSJohn Johansen rules->caps.allow); 173c70c86c4SJohn Johansen *permitted = cap_intersect(*permitted, 1741ad22fccSJohn Johansen rules->caps.allow); 175c70c86c4SJohn Johansen } 176b5e95b48SJohn Johansen } 177b5e95b48SJohn Johansen rcu_read_unlock(); 178637f688dSJohn Johansen aa_put_label(label); 179b5e95b48SJohn Johansen 180b5e95b48SJohn Johansen return 0; 181b5e95b48SJohn Johansen } 182b5e95b48SJohn Johansen 1836a9de491SEric Paris static int apparmor_capable(const struct cred *cred, struct user_namespace *ns, 184c1a85a00SMicah Morton int cap, unsigned int opts) 185b5e95b48SJohn Johansen { 186637f688dSJohn Johansen struct aa_label *label; 187b1d9e6b0SCasey Schaufler int error = 0; 188b1d9e6b0SCasey Schaufler 189637f688dSJohn Johansen label = aa_get_newest_cred_label(cred); 190637f688dSJohn Johansen if (!unconfined(label)) 191c1a85a00SMicah Morton error = aa_capable(label, cap, opts); 192637f688dSJohn Johansen aa_put_label(label); 193cf797c0eSJohn Johansen 194b5e95b48SJohn Johansen return error; 195b5e95b48SJohn Johansen } 196b5e95b48SJohn Johansen 197b5e95b48SJohn Johansen /** 198b5e95b48SJohn Johansen * common_perm - basic common permission check wrapper fn for paths 199b5e95b48SJohn Johansen * @op: operation being checked 200b5e95b48SJohn Johansen * @path: path to check permission of (NOT NULL) 201b5e95b48SJohn Johansen * @mask: requested permissions mask 202b5e95b48SJohn Johansen * @cond: conditional info for the permission request (NOT NULL) 203b5e95b48SJohn Johansen * 204b5e95b48SJohn Johansen * Returns: %0 else error code if error or permission denied 205b5e95b48SJohn Johansen */ 20647f6e5ccSJohn Johansen static int common_perm(const char *op, const struct path *path, u32 mask, 207b5e95b48SJohn Johansen struct path_cond *cond) 208b5e95b48SJohn Johansen { 209637f688dSJohn Johansen struct aa_label *label; 210b5e95b48SJohn Johansen int error = 0; 211b5e95b48SJohn Johansen 212637f688dSJohn Johansen label = __begin_current_label_crit_section(); 213637f688dSJohn Johansen if (!unconfined(label)) 214aebd873eSJohn Johansen error = aa_path_perm(op, label, path, 0, mask, cond); 215637f688dSJohn Johansen __end_current_label_crit_section(label); 216b5e95b48SJohn Johansen 217b5e95b48SJohn Johansen return error; 218b5e95b48SJohn Johansen } 219b5e95b48SJohn Johansen 220b5e95b48SJohn Johansen /** 22131f75bfeSJohn Johansen * common_perm_cond - common permission wrapper around inode cond 22231f75bfeSJohn Johansen * @op: operation being checked 22331f75bfeSJohn Johansen * @path: location to check (NOT NULL) 22431f75bfeSJohn Johansen * @mask: requested permissions mask 22531f75bfeSJohn Johansen * 22631f75bfeSJohn Johansen * Returns: %0 else error code if error or permission denied 22731f75bfeSJohn Johansen */ 22831f75bfeSJohn Johansen static int common_perm_cond(const char *op, const struct path *path, u32 mask) 22931f75bfeSJohn Johansen { 230*e67fe633SChristian Brauner vfsuid_t vfsuid = i_uid_into_vfsuid(mnt_idmap(path->mnt), 2315e26a01eSChristian Brauner d_backing_inode(path->dentry)); 2323cee6079SChristian Brauner struct path_cond cond = { 2335e26a01eSChristian Brauner vfsuid_into_kuid(vfsuid), 23431f75bfeSJohn Johansen d_backing_inode(path->dentry)->i_mode 23531f75bfeSJohn Johansen }; 23631f75bfeSJohn Johansen 23731f75bfeSJohn Johansen if (!path_mediated_fs(path->dentry)) 23831f75bfeSJohn Johansen return 0; 23931f75bfeSJohn Johansen 24031f75bfeSJohn Johansen return common_perm(op, path, mask, &cond); 24131f75bfeSJohn Johansen } 24231f75bfeSJohn Johansen 24331f75bfeSJohn Johansen /** 244b5e95b48SJohn Johansen * common_perm_dir_dentry - common permission wrapper when path is dir, dentry 245b5e95b48SJohn Johansen * @op: operation being checked 246b5e95b48SJohn Johansen * @dir: directory of the dentry (NOT NULL) 247b5e95b48SJohn Johansen * @dentry: dentry to check (NOT NULL) 248b5e95b48SJohn Johansen * @mask: requested permissions mask 249b5e95b48SJohn Johansen * @cond: conditional info for the permission request (NOT NULL) 250b5e95b48SJohn Johansen * 251b5e95b48SJohn Johansen * Returns: %0 else error code if error or permission denied 252b5e95b48SJohn Johansen */ 25347f6e5ccSJohn Johansen static int common_perm_dir_dentry(const char *op, const struct path *dir, 254b5e95b48SJohn Johansen struct dentry *dentry, u32 mask, 255b5e95b48SJohn Johansen struct path_cond *cond) 256b5e95b48SJohn Johansen { 2578486adf0SKees Cook struct path path = { .mnt = dir->mnt, .dentry = dentry }; 258b5e95b48SJohn Johansen 259b5e95b48SJohn Johansen return common_perm(op, &path, mask, cond); 260b5e95b48SJohn Johansen } 261b5e95b48SJohn Johansen 262b5e95b48SJohn Johansen /** 263b5e95b48SJohn Johansen * common_perm_rm - common permission wrapper for operations doing rm 264b5e95b48SJohn Johansen * @op: operation being checked 265b5e95b48SJohn Johansen * @dir: directory that the dentry is in (NOT NULL) 266b5e95b48SJohn Johansen * @dentry: dentry being rm'd (NOT NULL) 267b5e95b48SJohn Johansen * @mask: requested permission mask 268b5e95b48SJohn Johansen * 269b5e95b48SJohn Johansen * Returns: %0 else error code if error or permission denied 270b5e95b48SJohn Johansen */ 27147f6e5ccSJohn Johansen static int common_perm_rm(const char *op, const struct path *dir, 272b5e95b48SJohn Johansen struct dentry *dentry, u32 mask) 273b5e95b48SJohn Johansen { 274c6f493d6SDavid Howells struct inode *inode = d_backing_inode(dentry); 275b5e95b48SJohn Johansen struct path_cond cond = { }; 2765e26a01eSChristian Brauner vfsuid_t vfsuid; 277b5e95b48SJohn Johansen 278efeee83aSJohn Johansen if (!inode || !path_mediated_fs(dentry)) 279b5e95b48SJohn Johansen return 0; 280b5e95b48SJohn Johansen 281*e67fe633SChristian Brauner vfsuid = i_uid_into_vfsuid(mnt_idmap(dir->mnt), inode); 2825e26a01eSChristian Brauner cond.uid = vfsuid_into_kuid(vfsuid); 283b5e95b48SJohn Johansen cond.mode = inode->i_mode; 284b5e95b48SJohn Johansen 285b5e95b48SJohn Johansen return common_perm_dir_dentry(op, dir, dentry, mask, &cond); 286b5e95b48SJohn Johansen } 287b5e95b48SJohn Johansen 288b5e95b48SJohn Johansen /** 289b5e95b48SJohn Johansen * common_perm_create - common permission wrapper for operations doing create 290b5e95b48SJohn Johansen * @op: operation being checked 291b5e95b48SJohn Johansen * @dir: directory that dentry will be created in (NOT NULL) 292b5e95b48SJohn Johansen * @dentry: dentry to create (NOT NULL) 293b5e95b48SJohn Johansen * @mask: request permission mask 294b5e95b48SJohn Johansen * @mode: created file mode 295b5e95b48SJohn Johansen * 296b5e95b48SJohn Johansen * Returns: %0 else error code if error or permission denied 297b5e95b48SJohn Johansen */ 29847f6e5ccSJohn Johansen static int common_perm_create(const char *op, const struct path *dir, 299d6b49f7aSAl Viro struct dentry *dentry, u32 mask, umode_t mode) 300b5e95b48SJohn Johansen { 301b5e95b48SJohn Johansen struct path_cond cond = { current_fsuid(), mode }; 302b5e95b48SJohn Johansen 303efeee83aSJohn Johansen if (!path_mediated_fs(dir->dentry)) 304b5e95b48SJohn Johansen return 0; 305b5e95b48SJohn Johansen 306b5e95b48SJohn Johansen return common_perm_dir_dentry(op, dir, dentry, mask, &cond); 307b5e95b48SJohn Johansen } 308b5e95b48SJohn Johansen 309989f74e0SAl Viro static int apparmor_path_unlink(const struct path *dir, struct dentry *dentry) 310b5e95b48SJohn Johansen { 311b5e95b48SJohn Johansen return common_perm_rm(OP_UNLINK, dir, dentry, AA_MAY_DELETE); 312b5e95b48SJohn Johansen } 313b5e95b48SJohn Johansen 314d3607752SAl Viro static int apparmor_path_mkdir(const struct path *dir, struct dentry *dentry, 3154572befeSAl Viro umode_t mode) 316b5e95b48SJohn Johansen { 317b5e95b48SJohn Johansen return common_perm_create(OP_MKDIR, dir, dentry, AA_MAY_CREATE, 318b5e95b48SJohn Johansen S_IFDIR); 319b5e95b48SJohn Johansen } 320b5e95b48SJohn Johansen 321989f74e0SAl Viro static int apparmor_path_rmdir(const struct path *dir, struct dentry *dentry) 322b5e95b48SJohn Johansen { 323b5e95b48SJohn Johansen return common_perm_rm(OP_RMDIR, dir, dentry, AA_MAY_DELETE); 324b5e95b48SJohn Johansen } 325b5e95b48SJohn Johansen 326d3607752SAl Viro static int apparmor_path_mknod(const struct path *dir, struct dentry *dentry, 32704fc66e7SAl Viro umode_t mode, unsigned int dev) 328b5e95b48SJohn Johansen { 329b5e95b48SJohn Johansen return common_perm_create(OP_MKNOD, dir, dentry, AA_MAY_CREATE, mode); 330b5e95b48SJohn Johansen } 331b5e95b48SJohn Johansen 33281f4c506SAl Viro static int apparmor_path_truncate(const struct path *path) 333b5e95b48SJohn Johansen { 334e53cfe6cSJohn Johansen return common_perm_cond(OP_TRUNC, path, MAY_WRITE | AA_MAY_SETATTR); 335b5e95b48SJohn Johansen } 336b5e95b48SJohn Johansen 3373350607dSGünther Noack static int apparmor_file_truncate(struct file *file) 3383350607dSGünther Noack { 3393350607dSGünther Noack return apparmor_path_truncate(&file->f_path); 3403350607dSGünther Noack } 3413350607dSGünther Noack 342d3607752SAl Viro static int apparmor_path_symlink(const struct path *dir, struct dentry *dentry, 343b5e95b48SJohn Johansen const char *old_name) 344b5e95b48SJohn Johansen { 345b5e95b48SJohn Johansen return common_perm_create(OP_SYMLINK, dir, dentry, AA_MAY_CREATE, 346b5e95b48SJohn Johansen S_IFLNK); 347b5e95b48SJohn Johansen } 348b5e95b48SJohn Johansen 3493ccee46aSAl Viro static int apparmor_path_link(struct dentry *old_dentry, const struct path *new_dir, 350b5e95b48SJohn Johansen struct dentry *new_dentry) 351b5e95b48SJohn Johansen { 352637f688dSJohn Johansen struct aa_label *label; 353b5e95b48SJohn Johansen int error = 0; 354b5e95b48SJohn Johansen 355efeee83aSJohn Johansen if (!path_mediated_fs(old_dentry)) 356b5e95b48SJohn Johansen return 0; 357b5e95b48SJohn Johansen 358637f688dSJohn Johansen label = begin_current_label_crit_section(); 359637f688dSJohn Johansen if (!unconfined(label)) 3608014370fSJohn Johansen error = aa_path_link(label, old_dentry, new_dir, new_dentry); 361637f688dSJohn Johansen end_current_label_crit_section(label); 362cf797c0eSJohn Johansen 363b5e95b48SJohn Johansen return error; 364b5e95b48SJohn Johansen } 365b5e95b48SJohn Johansen 3663ccee46aSAl Viro static int apparmor_path_rename(const struct path *old_dir, struct dentry *old_dentry, 367100f59d9SMickaël Salaün const struct path *new_dir, struct dentry *new_dentry, 368100f59d9SMickaël Salaün const unsigned int flags) 369b5e95b48SJohn Johansen { 370637f688dSJohn Johansen struct aa_label *label; 371b5e95b48SJohn Johansen int error = 0; 372b5e95b48SJohn Johansen 373efeee83aSJohn Johansen if (!path_mediated_fs(old_dentry)) 374b5e95b48SJohn Johansen return 0; 375100f59d9SMickaël Salaün if ((flags & RENAME_EXCHANGE) && !path_mediated_fs(new_dentry)) 376100f59d9SMickaël Salaün return 0; 377b5e95b48SJohn Johansen 378637f688dSJohn Johansen label = begin_current_label_crit_section(); 379637f688dSJohn Johansen if (!unconfined(label)) { 380*e67fe633SChristian Brauner struct mnt_idmap *idmap = mnt_idmap(old_dir->mnt); 3815e26a01eSChristian Brauner vfsuid_t vfsuid; 3828486adf0SKees Cook struct path old_path = { .mnt = old_dir->mnt, 3838486adf0SKees Cook .dentry = old_dentry }; 3848486adf0SKees Cook struct path new_path = { .mnt = new_dir->mnt, 3858486adf0SKees Cook .dentry = new_dentry }; 3863cee6079SChristian Brauner struct path_cond cond = { 3875e26a01eSChristian Brauner .mode = d_backing_inode(old_dentry)->i_mode 388b5e95b48SJohn Johansen }; 389*e67fe633SChristian Brauner vfsuid = i_uid_into_vfsuid(idmap, d_backing_inode(old_dentry)); 3905e26a01eSChristian Brauner cond.uid = vfsuid_into_kuid(vfsuid); 391b5e95b48SJohn Johansen 392100f59d9SMickaël Salaün if (flags & RENAME_EXCHANGE) { 393100f59d9SMickaël Salaün struct path_cond cond_exchange = { 3945e26a01eSChristian Brauner .mode = d_backing_inode(new_dentry)->i_mode, 395100f59d9SMickaël Salaün }; 396*e67fe633SChristian Brauner vfsuid = i_uid_into_vfsuid(idmap, d_backing_inode(old_dentry)); 3975e26a01eSChristian Brauner cond_exchange.uid = vfsuid_into_kuid(vfsuid); 398100f59d9SMickaël Salaün 399100f59d9SMickaël Salaün error = aa_path_perm(OP_RENAME_SRC, label, &new_path, 0, 400100f59d9SMickaël Salaün MAY_READ | AA_MAY_GETATTR | MAY_WRITE | 401100f59d9SMickaël Salaün AA_MAY_SETATTR | AA_MAY_DELETE, 402100f59d9SMickaël Salaün &cond_exchange); 403100f59d9SMickaël Salaün if (!error) 404100f59d9SMickaël Salaün error = aa_path_perm(OP_RENAME_DEST, label, &old_path, 405100f59d9SMickaël Salaün 0, MAY_WRITE | AA_MAY_SETATTR | 406100f59d9SMickaël Salaün AA_MAY_CREATE, &cond_exchange); 407100f59d9SMickaël Salaün } 408100f59d9SMickaël Salaün 409100f59d9SMickaël Salaün if (!error) 410aebd873eSJohn Johansen error = aa_path_perm(OP_RENAME_SRC, label, &old_path, 0, 411e53cfe6cSJohn Johansen MAY_READ | AA_MAY_GETATTR | MAY_WRITE | 412e53cfe6cSJohn Johansen AA_MAY_SETATTR | AA_MAY_DELETE, 413b5e95b48SJohn Johansen &cond); 414b5e95b48SJohn Johansen if (!error) 415aebd873eSJohn Johansen error = aa_path_perm(OP_RENAME_DEST, label, &new_path, 416e53cfe6cSJohn Johansen 0, MAY_WRITE | AA_MAY_SETATTR | 417b5e95b48SJohn Johansen AA_MAY_CREATE, &cond); 418b5e95b48SJohn Johansen 419b5e95b48SJohn Johansen } 420637f688dSJohn Johansen end_current_label_crit_section(label); 421cf797c0eSJohn Johansen 422b5e95b48SJohn Johansen return error; 423b5e95b48SJohn Johansen } 424b5e95b48SJohn Johansen 425be01f9f2SAl Viro static int apparmor_path_chmod(const struct path *path, umode_t mode) 426b5e95b48SJohn Johansen { 42731f75bfeSJohn Johansen return common_perm_cond(OP_CHMOD, path, AA_MAY_CHMOD); 428b5e95b48SJohn Johansen } 429b5e95b48SJohn Johansen 4307fd25dacSAl Viro static int apparmor_path_chown(const struct path *path, kuid_t uid, kgid_t gid) 431b5e95b48SJohn Johansen { 43231f75bfeSJohn Johansen return common_perm_cond(OP_CHOWN, path, AA_MAY_CHOWN); 433b5e95b48SJohn Johansen } 434b5e95b48SJohn Johansen 4353f7036a0SAl Viro static int apparmor_inode_getattr(const struct path *path) 436b5e95b48SJohn Johansen { 437e53cfe6cSJohn Johansen return common_perm_cond(OP_GETATTR, path, AA_MAY_GETATTR); 438b5e95b48SJohn Johansen } 439b5e95b48SJohn Johansen 44094817692SAl Viro static int apparmor_file_open(struct file *file) 441b5e95b48SJohn Johansen { 442637f688dSJohn Johansen struct aa_file_ctx *fctx = file_ctx(file); 443637f688dSJohn Johansen struct aa_label *label; 444b5e95b48SJohn Johansen int error = 0; 445b5e95b48SJohn Johansen 446efeee83aSJohn Johansen if (!path_mediated_fs(file->f_path.dentry)) 447b5e95b48SJohn Johansen return 0; 448b5e95b48SJohn Johansen 449b5e95b48SJohn Johansen /* If in exec, permission is handled by bprm hooks. 450b5e95b48SJohn Johansen * Cache permissions granted by the previous exec check, with 451b5e95b48SJohn Johansen * implicit read and executable mmap which are required to 452b5e95b48SJohn Johansen * actually execute the image. 453b5e95b48SJohn Johansen */ 454b5e95b48SJohn Johansen if (current->in_execve) { 45555a26ebfSJohn Johansen fctx->allow = MAY_EXEC | MAY_READ | AA_EXEC_MMAP; 456b5e95b48SJohn Johansen return 0; 457b5e95b48SJohn Johansen } 458b5e95b48SJohn Johansen 45994817692SAl Viro label = aa_get_newest_cred_label(file->f_cred); 460637f688dSJohn Johansen if (!unconfined(label)) { 461*e67fe633SChristian Brauner struct mnt_idmap *idmap = file_mnt_idmap(file); 462496ad9aaSAl Viro struct inode *inode = file_inode(file); 4635e26a01eSChristian Brauner vfsuid_t vfsuid; 4643cee6079SChristian Brauner struct path_cond cond = { 4655e26a01eSChristian Brauner .mode = inode->i_mode, 4663cee6079SChristian Brauner }; 467*e67fe633SChristian Brauner vfsuid = i_uid_into_vfsuid(idmap, inode); 4685e26a01eSChristian Brauner cond.uid = vfsuid_into_kuid(vfsuid); 469b5e95b48SJohn Johansen 470aebd873eSJohn Johansen error = aa_path_perm(OP_OPEN, label, &file->f_path, 0, 471b5e95b48SJohn Johansen aa_map_file_to_perms(file), &cond); 472b5e95b48SJohn Johansen /* todo cache full allowed permissions set and state */ 47355a26ebfSJohn Johansen fctx->allow = aa_map_file_to_perms(file); 474b5e95b48SJohn Johansen } 475637f688dSJohn Johansen aa_put_label(label); 476b5e95b48SJohn Johansen 477b5e95b48SJohn Johansen return error; 478b5e95b48SJohn Johansen } 479b5e95b48SJohn Johansen 480b5e95b48SJohn Johansen static int apparmor_file_alloc_security(struct file *file) 481b5e95b48SJohn Johansen { 48233bf60caSCasey Schaufler struct aa_file_ctx *ctx = file_ctx(file); 483637f688dSJohn Johansen struct aa_label *label = begin_current_label_crit_section(); 484b5e95b48SJohn Johansen 48533bf60caSCasey Schaufler spin_lock_init(&ctx->lock); 48633bf60caSCasey Schaufler rcu_assign_pointer(ctx->label, aa_get_label(label)); 48733bf60caSCasey Schaufler end_current_label_crit_section(label); 48833bf60caSCasey Schaufler return 0; 489b5e95b48SJohn Johansen } 490b5e95b48SJohn Johansen 491b5e95b48SJohn Johansen static void apparmor_file_free_security(struct file *file) 492b5e95b48SJohn Johansen { 49333bf60caSCasey Schaufler struct aa_file_ctx *ctx = file_ctx(file); 49433bf60caSCasey Schaufler 49533bf60caSCasey Schaufler if (ctx) 49633bf60caSCasey Schaufler aa_put_label(rcu_access_pointer(ctx->label)); 497b5e95b48SJohn Johansen } 498b5e95b48SJohn Johansen 499341c1fdaSJohn Johansen static int common_file_perm(const char *op, struct file *file, u32 mask, 500341c1fdaSJohn Johansen bool in_atomic) 501b5e95b48SJohn Johansen { 502190a9518SJohn Johansen struct aa_label *label; 503b5e95b48SJohn Johansen int error = 0; 504b5e95b48SJohn Johansen 505192ca6b5SJohn Johansen /* don't reaudit files closed during inheritance */ 506192ca6b5SJohn Johansen if (file->f_path.dentry == aa_null.dentry) 507192ca6b5SJohn Johansen return -EACCES; 508192ca6b5SJohn Johansen 509637f688dSJohn Johansen label = __begin_current_label_crit_section(); 510341c1fdaSJohn Johansen error = aa_file_perm(op, label, file, mask, in_atomic); 511637f688dSJohn Johansen __end_current_label_crit_section(label); 512b5e95b48SJohn Johansen 513b5e95b48SJohn Johansen return error; 514b5e95b48SJohn Johansen } 515b5e95b48SJohn Johansen 516064dc947SJohn Johansen static int apparmor_file_receive(struct file *file) 517064dc947SJohn Johansen { 518341c1fdaSJohn Johansen return common_file_perm(OP_FRECEIVE, file, aa_map_file_to_perms(file), 519341c1fdaSJohn Johansen false); 520064dc947SJohn Johansen } 521064dc947SJohn Johansen 522b5e95b48SJohn Johansen static int apparmor_file_permission(struct file *file, int mask) 523b5e95b48SJohn Johansen { 524341c1fdaSJohn Johansen return common_file_perm(OP_FPERM, file, mask, false); 525b5e95b48SJohn Johansen } 526b5e95b48SJohn Johansen 527b5e95b48SJohn Johansen static int apparmor_file_lock(struct file *file, unsigned int cmd) 528b5e95b48SJohn Johansen { 529b5e95b48SJohn Johansen u32 mask = AA_MAY_LOCK; 530b5e95b48SJohn Johansen 531b5e95b48SJohn Johansen if (cmd == F_WRLCK) 532b5e95b48SJohn Johansen mask |= MAY_WRITE; 533b5e95b48SJohn Johansen 534341c1fdaSJohn Johansen return common_file_perm(OP_FLOCK, file, mask, false); 535b5e95b48SJohn Johansen } 536b5e95b48SJohn Johansen 53747f6e5ccSJohn Johansen static int common_mmap(const char *op, struct file *file, unsigned long prot, 538341c1fdaSJohn Johansen unsigned long flags, bool in_atomic) 539b5e95b48SJohn Johansen { 540b5e95b48SJohn Johansen int mask = 0; 541b5e95b48SJohn Johansen 542637f688dSJohn Johansen if (!file || !file_ctx(file)) 543b5e95b48SJohn Johansen return 0; 544b5e95b48SJohn Johansen 545b5e95b48SJohn Johansen if (prot & PROT_READ) 546b5e95b48SJohn Johansen mask |= MAY_READ; 547b5e95b48SJohn Johansen /* 548b5e95b48SJohn Johansen * Private mappings don't require write perms since they don't 549b5e95b48SJohn Johansen * write back to the files 550b5e95b48SJohn Johansen */ 551b5e95b48SJohn Johansen if ((prot & PROT_WRITE) && !(flags & MAP_PRIVATE)) 552b5e95b48SJohn Johansen mask |= MAY_WRITE; 553b5e95b48SJohn Johansen if (prot & PROT_EXEC) 554b5e95b48SJohn Johansen mask |= AA_EXEC_MMAP; 555b5e95b48SJohn Johansen 556341c1fdaSJohn Johansen return common_file_perm(op, file, mask, in_atomic); 557b5e95b48SJohn Johansen } 558b5e95b48SJohn Johansen 559e5467859SAl Viro static int apparmor_mmap_file(struct file *file, unsigned long reqprot, 560e5467859SAl Viro unsigned long prot, unsigned long flags) 561b5e95b48SJohn Johansen { 562341c1fdaSJohn Johansen return common_mmap(OP_FMMAP, file, prot, flags, GFP_ATOMIC); 563b5e95b48SJohn Johansen } 564b5e95b48SJohn Johansen 565b5e95b48SJohn Johansen static int apparmor_file_mprotect(struct vm_area_struct *vma, 566b5e95b48SJohn Johansen unsigned long reqprot, unsigned long prot) 567b5e95b48SJohn Johansen { 568b5e95b48SJohn Johansen return common_mmap(OP_FMPROT, vma->vm_file, prot, 569341c1fdaSJohn Johansen !(vma->vm_flags & VM_SHARED) ? MAP_PRIVATE : 0, 570341c1fdaSJohn Johansen false); 571b5e95b48SJohn Johansen } 572b5e95b48SJohn Johansen 5732ea3ffb7SJohn Johansen static int apparmor_sb_mount(const char *dev_name, const struct path *path, 5742ea3ffb7SJohn Johansen const char *type, unsigned long flags, void *data) 5752ea3ffb7SJohn Johansen { 5762ea3ffb7SJohn Johansen struct aa_label *label; 5772ea3ffb7SJohn Johansen int error = 0; 5782ea3ffb7SJohn Johansen 5792ea3ffb7SJohn Johansen /* Discard magic */ 5802ea3ffb7SJohn Johansen if ((flags & MS_MGC_MSK) == MS_MGC_VAL) 5812ea3ffb7SJohn Johansen flags &= ~MS_MGC_MSK; 5822ea3ffb7SJohn Johansen 5832ea3ffb7SJohn Johansen flags &= ~AA_MS_IGNORE_MASK; 5842ea3ffb7SJohn Johansen 5852ea3ffb7SJohn Johansen label = __begin_current_label_crit_section(); 5862ea3ffb7SJohn Johansen if (!unconfined(label)) { 5872ea3ffb7SJohn Johansen if (flags & MS_REMOUNT) 5882ea3ffb7SJohn Johansen error = aa_remount(label, path, flags, data); 5892ea3ffb7SJohn Johansen else if (flags & MS_BIND) 5902ea3ffb7SJohn Johansen error = aa_bind_mount(label, path, dev_name, flags); 5912ea3ffb7SJohn Johansen else if (flags & (MS_SHARED | MS_PRIVATE | MS_SLAVE | 5922ea3ffb7SJohn Johansen MS_UNBINDABLE)) 5932ea3ffb7SJohn Johansen error = aa_mount_change_type(label, path, flags); 5942ea3ffb7SJohn Johansen else if (flags & MS_MOVE) 5952ea3ffb7SJohn Johansen error = aa_move_mount(label, path, dev_name); 5962ea3ffb7SJohn Johansen else 5972ea3ffb7SJohn Johansen error = aa_new_mount(label, dev_name, path, type, 5982ea3ffb7SJohn Johansen flags, data); 5992ea3ffb7SJohn Johansen } 6002ea3ffb7SJohn Johansen __end_current_label_crit_section(label); 6012ea3ffb7SJohn Johansen 6022ea3ffb7SJohn Johansen return error; 6032ea3ffb7SJohn Johansen } 6042ea3ffb7SJohn Johansen 6052ea3ffb7SJohn Johansen static int apparmor_sb_umount(struct vfsmount *mnt, int flags) 6062ea3ffb7SJohn Johansen { 6072ea3ffb7SJohn Johansen struct aa_label *label; 6082ea3ffb7SJohn Johansen int error = 0; 6092ea3ffb7SJohn Johansen 6102ea3ffb7SJohn Johansen label = __begin_current_label_crit_section(); 6112ea3ffb7SJohn Johansen if (!unconfined(label)) 6122ea3ffb7SJohn Johansen error = aa_umount(label, mnt, flags); 6132ea3ffb7SJohn Johansen __end_current_label_crit_section(label); 6142ea3ffb7SJohn Johansen 6152ea3ffb7SJohn Johansen return error; 6162ea3ffb7SJohn Johansen } 6172ea3ffb7SJohn Johansen 6182ea3ffb7SJohn Johansen static int apparmor_sb_pivotroot(const struct path *old_path, 6192ea3ffb7SJohn Johansen const struct path *new_path) 6202ea3ffb7SJohn Johansen { 6212ea3ffb7SJohn Johansen struct aa_label *label; 6222ea3ffb7SJohn Johansen int error = 0; 6232ea3ffb7SJohn Johansen 6242ea3ffb7SJohn Johansen label = aa_get_current_label(); 6252ea3ffb7SJohn Johansen if (!unconfined(label)) 6262ea3ffb7SJohn Johansen error = aa_pivotroot(label, old_path, new_path); 6272ea3ffb7SJohn Johansen aa_put_label(label); 6282ea3ffb7SJohn Johansen 6292ea3ffb7SJohn Johansen return error; 6302ea3ffb7SJohn Johansen } 6312ea3ffb7SJohn Johansen 632c8e477c6SAl Viro static int apparmor_getprocattr(struct task_struct *task, const char *name, 633b5e95b48SJohn Johansen char **value) 634b5e95b48SJohn Johansen { 635b5e95b48SJohn Johansen int error = -ENOENT; 636b5e95b48SJohn Johansen /* released below */ 637b5e95b48SJohn Johansen const struct cred *cred = get_task_cred(task); 638de62de59SJohn Johansen struct aa_task_ctx *ctx = task_ctx(current); 639637f688dSJohn Johansen struct aa_label *label = NULL; 640b5e95b48SJohn Johansen 641b5e95b48SJohn Johansen if (strcmp(name, "current") == 0) 642d9087c49SJohn Johansen label = aa_get_newest_label(cred_label(cred)); 64355a26ebfSJohn Johansen else if (strcmp(name, "prev") == 0 && ctx->previous) 644637f688dSJohn Johansen label = aa_get_newest_label(ctx->previous); 64555a26ebfSJohn Johansen else if (strcmp(name, "exec") == 0 && ctx->onexec) 646637f688dSJohn Johansen label = aa_get_newest_label(ctx->onexec); 647b5e95b48SJohn Johansen else 648b5e95b48SJohn Johansen error = -EINVAL; 649b5e95b48SJohn Johansen 650637f688dSJohn Johansen if (label) 65176a1d263SJohn Johansen error = aa_getprocattr(label, value); 65277b071b3SJohn Johansen 653637f688dSJohn Johansen aa_put_label(label); 654b5e95b48SJohn Johansen put_cred(cred); 655b5e95b48SJohn Johansen 656b5e95b48SJohn Johansen return error; 657b5e95b48SJohn Johansen } 658b5e95b48SJohn Johansen 659b21507e2SStephen Smalley static int apparmor_setprocattr(const char *name, void *value, 660b21507e2SStephen Smalley size_t size) 661b5e95b48SJohn Johansen { 662e89b8081SVegard Nossum char *command, *largs = NULL, *args = value; 663b5e95b48SJohn Johansen size_t arg_size; 664b5e95b48SJohn Johansen int error; 6658c4b785aSJohn Johansen DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_NONE, AA_CLASS_NONE, 6668c4b785aSJohn Johansen OP_SETPROCATTR); 667b5e95b48SJohn Johansen 668b5e95b48SJohn Johansen if (size == 0) 669b5e95b48SJohn Johansen return -EINVAL; 670b5e95b48SJohn Johansen 671e89b8081SVegard Nossum /* AppArmor requires that the buffer must be null terminated atm */ 672e89b8081SVegard Nossum if (args[size - 1] != '\0') { 673e89b8081SVegard Nossum /* null terminate */ 674e89b8081SVegard Nossum largs = args = kmalloc(size + 1, GFP_KERNEL); 675e89b8081SVegard Nossum if (!args) 676e89b8081SVegard Nossum return -ENOMEM; 677e89b8081SVegard Nossum memcpy(args, value, size); 678e89b8081SVegard Nossum args[size] = '\0'; 679e89b8081SVegard Nossum } 680e89b8081SVegard Nossum 681e89b8081SVegard Nossum error = -EINVAL; 682b5e95b48SJohn Johansen args = strim(args); 683b5e95b48SJohn Johansen command = strsep(&args, " "); 684b5e95b48SJohn Johansen if (!args) 685e89b8081SVegard Nossum goto out; 686b5e95b48SJohn Johansen args = skip_spaces(args); 687b5e95b48SJohn Johansen if (!*args) 688e89b8081SVegard Nossum goto out; 689b5e95b48SJohn Johansen 690d4d03f74SJohn Johansen arg_size = size - (args - (largs ? largs : (char *) value)); 691b5e95b48SJohn Johansen if (strcmp(name, "current") == 0) { 692b5e95b48SJohn Johansen if (strcmp(command, "changehat") == 0) { 693b5e95b48SJohn Johansen error = aa_setprocattr_changehat(args, arg_size, 694df8073c6SJohn Johansen AA_CHANGE_NOFLAGS); 695b5e95b48SJohn Johansen } else if (strcmp(command, "permhat") == 0) { 696b5e95b48SJohn Johansen error = aa_setprocattr_changehat(args, arg_size, 697df8073c6SJohn Johansen AA_CHANGE_TEST); 698b5e95b48SJohn Johansen } else if (strcmp(command, "changeprofile") == 0) { 699df8073c6SJohn Johansen error = aa_change_profile(args, AA_CHANGE_NOFLAGS); 700b5e95b48SJohn Johansen } else if (strcmp(command, "permprofile") == 0) { 701df8073c6SJohn Johansen error = aa_change_profile(args, AA_CHANGE_TEST); 7026c5fc8f1SJohn Johansen } else if (strcmp(command, "stack") == 0) { 7036c5fc8f1SJohn Johansen error = aa_change_profile(args, AA_CHANGE_STACK); 7043eea57c2SJohn Johansen } else 7053eea57c2SJohn Johansen goto fail; 706b5e95b48SJohn Johansen } else if (strcmp(name, "exec") == 0) { 7073eea57c2SJohn Johansen if (strcmp(command, "exec") == 0) 708df8073c6SJohn Johansen error = aa_change_profile(args, AA_CHANGE_ONEXEC); 7096c5fc8f1SJohn Johansen else if (strcmp(command, "stack") == 0) 7106c5fc8f1SJohn Johansen error = aa_change_profile(args, (AA_CHANGE_ONEXEC | 7116c5fc8f1SJohn Johansen AA_CHANGE_STACK)); 7123eea57c2SJohn Johansen else 7133eea57c2SJohn Johansen goto fail; 7143eea57c2SJohn Johansen } else 715b5e95b48SJohn Johansen /* only support the "current" and "exec" process attributes */ 716e89b8081SVegard Nossum goto fail; 7173eea57c2SJohn Johansen 718b5e95b48SJohn Johansen if (!error) 719b5e95b48SJohn Johansen error = size; 720e89b8081SVegard Nossum out: 721e89b8081SVegard Nossum kfree(largs); 722b5e95b48SJohn Johansen return error; 7233eea57c2SJohn Johansen 7243eea57c2SJohn Johansen fail: 725637f688dSJohn Johansen aad(&sa)->label = begin_current_label_crit_section(); 726ef88a7acSJohn Johansen aad(&sa)->info = name; 727ef88a7acSJohn Johansen aad(&sa)->error = error = -EINVAL; 7283eea57c2SJohn Johansen aa_audit_msg(AUDIT_APPARMOR_DENIED, &sa, NULL); 729637f688dSJohn Johansen end_current_label_crit_section(aad(&sa)->label); 730e89b8081SVegard Nossum goto out; 731b5e95b48SJohn Johansen } 732b5e95b48SJohn Johansen 733fe864821SJohn Johansen /** 734fe864821SJohn Johansen * apparmor_bprm_committing_creds - do task cleanup on committing new creds 735fe864821SJohn Johansen * @bprm: binprm for the exec (NOT NULL) 736fe864821SJohn Johansen */ 737fe864821SJohn Johansen static void apparmor_bprm_committing_creds(struct linux_binprm *bprm) 738fe864821SJohn Johansen { 739637f688dSJohn Johansen struct aa_label *label = aa_current_raw_label(); 740d9087c49SJohn Johansen struct aa_label *new_label = cred_label(bprm->cred); 741fe864821SJohn Johansen 742fe864821SJohn Johansen /* bail out if unconfined or not changing profile */ 743d9087c49SJohn Johansen if ((new_label->proxy == label->proxy) || 744d9087c49SJohn Johansen (unconfined(new_label))) 745fe864821SJohn Johansen return; 746fe864821SJohn Johansen 747192ca6b5SJohn Johansen aa_inherit_files(bprm->cred, current->files); 748192ca6b5SJohn Johansen 749fe864821SJohn Johansen current->pdeath_signal = 0; 750fe864821SJohn Johansen 751637f688dSJohn Johansen /* reset soft limits and set hard limits for the new label */ 752d9087c49SJohn Johansen __aa_transition_rlimits(label, new_label); 753fe864821SJohn Johansen } 754fe864821SJohn Johansen 755fe864821SJohn Johansen /** 756391f1211SJiapeng Chong * apparmor_bprm_committed_creds() - do cleanup after new creds committed 757fe864821SJohn Johansen * @bprm: binprm for the exec (NOT NULL) 758fe864821SJohn Johansen */ 759fe864821SJohn Johansen static void apparmor_bprm_committed_creds(struct linux_binprm *bprm) 760fe864821SJohn Johansen { 7613b529a76SJohn Johansen /* clear out temporary/transitional state from the context */ 762de62de59SJohn Johansen aa_clear_task_ctx_trans(task_ctx(current)); 7633b529a76SJohn Johansen 764fe864821SJohn Johansen return; 765fe864821SJohn Johansen } 766fe864821SJohn Johansen 7676326948fSPaul Moore static void apparmor_current_getsecid_subj(u32 *secid) 7686326948fSPaul Moore { 7696326948fSPaul Moore struct aa_label *label = aa_get_current_label(); 7706326948fSPaul Moore *secid = label->secid; 7716326948fSPaul Moore aa_put_label(label); 7726326948fSPaul Moore } 7736326948fSPaul Moore 7746326948fSPaul Moore static void apparmor_task_getsecid_obj(struct task_struct *p, u32 *secid) 775a7ae3645SJohn Johansen { 776a7ae3645SJohn Johansen struct aa_label *label = aa_get_task_label(p); 777a7ae3645SJohn Johansen *secid = label->secid; 778a7ae3645SJohn Johansen aa_put_label(label); 779a7ae3645SJohn Johansen } 780a7ae3645SJohn Johansen 7817cb4dc9fSJiri Slaby static int apparmor_task_setrlimit(struct task_struct *task, 7827cb4dc9fSJiri Slaby unsigned int resource, struct rlimit *new_rlim) 783b5e95b48SJohn Johansen { 784637f688dSJohn Johansen struct aa_label *label = __begin_current_label_crit_section(); 785b5e95b48SJohn Johansen int error = 0; 786b5e95b48SJohn Johansen 787637f688dSJohn Johansen if (!unconfined(label)) 78886b92cb7SJohn Johansen error = aa_task_setrlimit(label, task, resource, new_rlim); 789637f688dSJohn Johansen __end_current_label_crit_section(label); 790b5e95b48SJohn Johansen 791b5e95b48SJohn Johansen return error; 792b5e95b48SJohn Johansen } 793b5e95b48SJohn Johansen 794ae7795bcSEric W. Biederman static int apparmor_task_kill(struct task_struct *target, struct kernel_siginfo *info, 7956b4f3d01SStephen Smalley int sig, const struct cred *cred) 796cd1dbf76SJohn Johansen { 797cd1dbf76SJohn Johansen struct aa_label *cl, *tl; 798cd1dbf76SJohn Johansen int error; 799cd1dbf76SJohn Johansen 8006b4f3d01SStephen Smalley if (cred) { 8016b4f3d01SStephen Smalley /* 802cd1dbf76SJohn Johansen * Dealing with USB IO specific behavior 803cd1dbf76SJohn Johansen */ 8046b4f3d01SStephen Smalley cl = aa_get_newest_cred_label(cred); 8056b4f3d01SStephen Smalley tl = aa_get_task_label(target); 8066b4f3d01SStephen Smalley error = aa_may_signal(cl, tl, sig); 8076b4f3d01SStephen Smalley aa_put_label(cl); 8086b4f3d01SStephen Smalley aa_put_label(tl); 8096b4f3d01SStephen Smalley return error; 8106b4f3d01SStephen Smalley } 8116b4f3d01SStephen Smalley 812cd1dbf76SJohn Johansen cl = __begin_current_label_crit_section(); 813cd1dbf76SJohn Johansen tl = aa_get_task_label(target); 814cd1dbf76SJohn Johansen error = aa_may_signal(cl, tl, sig); 815cd1dbf76SJohn Johansen aa_put_label(tl); 816cd1dbf76SJohn Johansen __end_current_label_crit_section(cl); 817cd1dbf76SJohn Johansen 818cd1dbf76SJohn Johansen return error; 819cd1dbf76SJohn Johansen } 820cd1dbf76SJohn Johansen 82156974a6fSJohn Johansen /** 82256974a6fSJohn Johansen * apparmor_sk_alloc_security - allocate and attach the sk_security field 82356974a6fSJohn Johansen */ 82456974a6fSJohn Johansen static int apparmor_sk_alloc_security(struct sock *sk, int family, gfp_t flags) 82556974a6fSJohn Johansen { 82656974a6fSJohn Johansen struct aa_sk_ctx *ctx; 82756974a6fSJohn Johansen 82856974a6fSJohn Johansen ctx = kzalloc(sizeof(*ctx), flags); 82956974a6fSJohn Johansen if (!ctx) 83056974a6fSJohn Johansen return -ENOMEM; 83156974a6fSJohn Johansen 83256974a6fSJohn Johansen SK_CTX(sk) = ctx; 83356974a6fSJohn Johansen 83456974a6fSJohn Johansen return 0; 83556974a6fSJohn Johansen } 83656974a6fSJohn Johansen 83756974a6fSJohn Johansen /** 83856974a6fSJohn Johansen * apparmor_sk_free_security - free the sk_security field 83956974a6fSJohn Johansen */ 84056974a6fSJohn Johansen static void apparmor_sk_free_security(struct sock *sk) 84156974a6fSJohn Johansen { 84256974a6fSJohn Johansen struct aa_sk_ctx *ctx = SK_CTX(sk); 84356974a6fSJohn Johansen 84456974a6fSJohn Johansen SK_CTX(sk) = NULL; 84556974a6fSJohn Johansen aa_put_label(ctx->label); 84656974a6fSJohn Johansen aa_put_label(ctx->peer); 84756974a6fSJohn Johansen kfree(ctx); 84856974a6fSJohn Johansen } 84956974a6fSJohn Johansen 85056974a6fSJohn Johansen /** 8510fc6ab40SYang Li * apparmor_sk_clone_security - clone the sk_security field 85256974a6fSJohn Johansen */ 85356974a6fSJohn Johansen static void apparmor_sk_clone_security(const struct sock *sk, 85456974a6fSJohn Johansen struct sock *newsk) 85556974a6fSJohn Johansen { 85656974a6fSJohn Johansen struct aa_sk_ctx *ctx = SK_CTX(sk); 85756974a6fSJohn Johansen struct aa_sk_ctx *new = SK_CTX(newsk); 85856974a6fSJohn Johansen 8593b646abcSMauricio Faria de Oliveira if (new->label) 8603b646abcSMauricio Faria de Oliveira aa_put_label(new->label); 86156974a6fSJohn Johansen new->label = aa_get_label(ctx->label); 8623b646abcSMauricio Faria de Oliveira 8633b646abcSMauricio Faria de Oliveira if (new->peer) 8643b646abcSMauricio Faria de Oliveira aa_put_label(new->peer); 86556974a6fSJohn Johansen new->peer = aa_get_label(ctx->peer); 86656974a6fSJohn Johansen } 86756974a6fSJohn Johansen 86856974a6fSJohn Johansen /** 86956974a6fSJohn Johansen * apparmor_socket_create - check perms before creating a new socket 87056974a6fSJohn Johansen */ 87156974a6fSJohn Johansen static int apparmor_socket_create(int family, int type, int protocol, int kern) 87256974a6fSJohn Johansen { 87356974a6fSJohn Johansen struct aa_label *label; 87456974a6fSJohn Johansen int error = 0; 87556974a6fSJohn Johansen 87656974a6fSJohn Johansen AA_BUG(in_interrupt()); 87756974a6fSJohn Johansen 87856974a6fSJohn Johansen label = begin_current_label_crit_section(); 87956974a6fSJohn Johansen if (!(kern || unconfined(label))) 88056974a6fSJohn Johansen error = af_select(family, 88156974a6fSJohn Johansen create_perm(label, family, type, protocol), 88256974a6fSJohn Johansen aa_af_perm(label, OP_CREATE, AA_MAY_CREATE, 88356974a6fSJohn Johansen family, type, protocol)); 88456974a6fSJohn Johansen end_current_label_crit_section(label); 88556974a6fSJohn Johansen 88656974a6fSJohn Johansen return error; 88756974a6fSJohn Johansen } 88856974a6fSJohn Johansen 88956974a6fSJohn Johansen /** 89056974a6fSJohn Johansen * apparmor_socket_post_create - setup the per-socket security struct 89156974a6fSJohn Johansen * 89256974a6fSJohn Johansen * Note: 89356974a6fSJohn Johansen * - kernel sockets currently labeled unconfined but we may want to 89456974a6fSJohn Johansen * move to a special kernel label 89556974a6fSJohn Johansen * - socket may not have sk here if created with sock_create_lite or 89656974a6fSJohn Johansen * sock_alloc. These should be accept cases which will be handled in 89756974a6fSJohn Johansen * sock_graft. 89856974a6fSJohn Johansen */ 89956974a6fSJohn Johansen static int apparmor_socket_post_create(struct socket *sock, int family, 90056974a6fSJohn Johansen int type, int protocol, int kern) 90156974a6fSJohn Johansen { 90256974a6fSJohn Johansen struct aa_label *label; 90356974a6fSJohn Johansen 90456974a6fSJohn Johansen if (kern) { 90595c0581fSJohn Johansen label = aa_get_label(kernel_t); 90656974a6fSJohn Johansen } else 90756974a6fSJohn Johansen label = aa_get_current_label(); 90856974a6fSJohn Johansen 90956974a6fSJohn Johansen if (sock->sk) { 91056974a6fSJohn Johansen struct aa_sk_ctx *ctx = SK_CTX(sock->sk); 91156974a6fSJohn Johansen 91256974a6fSJohn Johansen aa_put_label(ctx->label); 91356974a6fSJohn Johansen ctx->label = aa_get_label(label); 91456974a6fSJohn Johansen } 91556974a6fSJohn Johansen aa_put_label(label); 91656974a6fSJohn Johansen 91756974a6fSJohn Johansen return 0; 91856974a6fSJohn Johansen } 91956974a6fSJohn Johansen 92056974a6fSJohn Johansen /** 92156974a6fSJohn Johansen * apparmor_socket_bind - check perms before bind addr to socket 92256974a6fSJohn Johansen */ 92356974a6fSJohn Johansen static int apparmor_socket_bind(struct socket *sock, 92456974a6fSJohn Johansen struct sockaddr *address, int addrlen) 92556974a6fSJohn Johansen { 92656974a6fSJohn Johansen AA_BUG(!sock); 92756974a6fSJohn Johansen AA_BUG(!sock->sk); 92856974a6fSJohn Johansen AA_BUG(!address); 92956974a6fSJohn Johansen AA_BUG(in_interrupt()); 93056974a6fSJohn Johansen 93156974a6fSJohn Johansen return af_select(sock->sk->sk_family, 93256974a6fSJohn Johansen bind_perm(sock, address, addrlen), 93356974a6fSJohn Johansen aa_sk_perm(OP_BIND, AA_MAY_BIND, sock->sk)); 93456974a6fSJohn Johansen } 93556974a6fSJohn Johansen 93656974a6fSJohn Johansen /** 93756974a6fSJohn Johansen * apparmor_socket_connect - check perms before connecting @sock to @address 93856974a6fSJohn Johansen */ 93956974a6fSJohn Johansen static int apparmor_socket_connect(struct socket *sock, 94056974a6fSJohn Johansen struct sockaddr *address, int addrlen) 94156974a6fSJohn Johansen { 94256974a6fSJohn Johansen AA_BUG(!sock); 94356974a6fSJohn Johansen AA_BUG(!sock->sk); 94456974a6fSJohn Johansen AA_BUG(!address); 94556974a6fSJohn Johansen AA_BUG(in_interrupt()); 94656974a6fSJohn Johansen 94756974a6fSJohn Johansen return af_select(sock->sk->sk_family, 94856974a6fSJohn Johansen connect_perm(sock, address, addrlen), 94956974a6fSJohn Johansen aa_sk_perm(OP_CONNECT, AA_MAY_CONNECT, sock->sk)); 95056974a6fSJohn Johansen } 95156974a6fSJohn Johansen 95256974a6fSJohn Johansen /** 9530fc6ab40SYang Li * apparmor_socket_listen - check perms before allowing listen 95456974a6fSJohn Johansen */ 95556974a6fSJohn Johansen static int apparmor_socket_listen(struct socket *sock, int backlog) 95656974a6fSJohn Johansen { 95756974a6fSJohn Johansen AA_BUG(!sock); 95856974a6fSJohn Johansen AA_BUG(!sock->sk); 95956974a6fSJohn Johansen AA_BUG(in_interrupt()); 96056974a6fSJohn Johansen 96156974a6fSJohn Johansen return af_select(sock->sk->sk_family, 96256974a6fSJohn Johansen listen_perm(sock, backlog), 96356974a6fSJohn Johansen aa_sk_perm(OP_LISTEN, AA_MAY_LISTEN, sock->sk)); 96456974a6fSJohn Johansen } 96556974a6fSJohn Johansen 96656974a6fSJohn Johansen /** 96756974a6fSJohn Johansen * apparmor_socket_accept - check perms before accepting a new connection. 96856974a6fSJohn Johansen * 96956974a6fSJohn Johansen * Note: while @newsock is created and has some information, the accept 97056974a6fSJohn Johansen * has not been done. 97156974a6fSJohn Johansen */ 97256974a6fSJohn Johansen static int apparmor_socket_accept(struct socket *sock, struct socket *newsock) 97356974a6fSJohn Johansen { 97456974a6fSJohn Johansen AA_BUG(!sock); 97556974a6fSJohn Johansen AA_BUG(!sock->sk); 97656974a6fSJohn Johansen AA_BUG(!newsock); 97756974a6fSJohn Johansen AA_BUG(in_interrupt()); 97856974a6fSJohn Johansen 97956974a6fSJohn Johansen return af_select(sock->sk->sk_family, 98056974a6fSJohn Johansen accept_perm(sock, newsock), 98156974a6fSJohn Johansen aa_sk_perm(OP_ACCEPT, AA_MAY_ACCEPT, sock->sk)); 98256974a6fSJohn Johansen } 98356974a6fSJohn Johansen 98456974a6fSJohn Johansen static int aa_sock_msg_perm(const char *op, u32 request, struct socket *sock, 98556974a6fSJohn Johansen struct msghdr *msg, int size) 98656974a6fSJohn Johansen { 98756974a6fSJohn Johansen AA_BUG(!sock); 98856974a6fSJohn Johansen AA_BUG(!sock->sk); 98956974a6fSJohn Johansen AA_BUG(!msg); 99056974a6fSJohn Johansen AA_BUG(in_interrupt()); 99156974a6fSJohn Johansen 99256974a6fSJohn Johansen return af_select(sock->sk->sk_family, 99356974a6fSJohn Johansen msg_perm(op, request, sock, msg, size), 99456974a6fSJohn Johansen aa_sk_perm(op, request, sock->sk)); 99556974a6fSJohn Johansen } 99656974a6fSJohn Johansen 99756974a6fSJohn Johansen /** 99856974a6fSJohn Johansen * apparmor_socket_sendmsg - check perms before sending msg to another socket 99956974a6fSJohn Johansen */ 100056974a6fSJohn Johansen static int apparmor_socket_sendmsg(struct socket *sock, 100156974a6fSJohn Johansen struct msghdr *msg, int size) 100256974a6fSJohn Johansen { 100356974a6fSJohn Johansen return aa_sock_msg_perm(OP_SENDMSG, AA_MAY_SEND, sock, msg, size); 100456974a6fSJohn Johansen } 100556974a6fSJohn Johansen 100656974a6fSJohn Johansen /** 100756974a6fSJohn Johansen * apparmor_socket_recvmsg - check perms before receiving a message 100856974a6fSJohn Johansen */ 100956974a6fSJohn Johansen static int apparmor_socket_recvmsg(struct socket *sock, 101056974a6fSJohn Johansen struct msghdr *msg, int size, int flags) 101156974a6fSJohn Johansen { 101256974a6fSJohn Johansen return aa_sock_msg_perm(OP_RECVMSG, AA_MAY_RECEIVE, sock, msg, size); 101356974a6fSJohn Johansen } 101456974a6fSJohn Johansen 101556974a6fSJohn Johansen /* revaliation, get/set attr, shutdown */ 101656974a6fSJohn Johansen static int aa_sock_perm(const char *op, u32 request, struct socket *sock) 101756974a6fSJohn Johansen { 101856974a6fSJohn Johansen AA_BUG(!sock); 101956974a6fSJohn Johansen AA_BUG(!sock->sk); 102056974a6fSJohn Johansen AA_BUG(in_interrupt()); 102156974a6fSJohn Johansen 102256974a6fSJohn Johansen return af_select(sock->sk->sk_family, 102356974a6fSJohn Johansen sock_perm(op, request, sock), 102456974a6fSJohn Johansen aa_sk_perm(op, request, sock->sk)); 102556974a6fSJohn Johansen } 102656974a6fSJohn Johansen 102756974a6fSJohn Johansen /** 102856974a6fSJohn Johansen * apparmor_socket_getsockname - check perms before getting the local address 102956974a6fSJohn Johansen */ 103056974a6fSJohn Johansen static int apparmor_socket_getsockname(struct socket *sock) 103156974a6fSJohn Johansen { 103256974a6fSJohn Johansen return aa_sock_perm(OP_GETSOCKNAME, AA_MAY_GETATTR, sock); 103356974a6fSJohn Johansen } 103456974a6fSJohn Johansen 103556974a6fSJohn Johansen /** 103656974a6fSJohn Johansen * apparmor_socket_getpeername - check perms before getting remote address 103756974a6fSJohn Johansen */ 103856974a6fSJohn Johansen static int apparmor_socket_getpeername(struct socket *sock) 103956974a6fSJohn Johansen { 104056974a6fSJohn Johansen return aa_sock_perm(OP_GETPEERNAME, AA_MAY_GETATTR, sock); 104156974a6fSJohn Johansen } 104256974a6fSJohn Johansen 104356974a6fSJohn Johansen /* revaliation, get/set attr, opt */ 104456974a6fSJohn Johansen static int aa_sock_opt_perm(const char *op, u32 request, struct socket *sock, 104556974a6fSJohn Johansen int level, int optname) 104656974a6fSJohn Johansen { 104756974a6fSJohn Johansen AA_BUG(!sock); 104856974a6fSJohn Johansen AA_BUG(!sock->sk); 104956974a6fSJohn Johansen AA_BUG(in_interrupt()); 105056974a6fSJohn Johansen 105156974a6fSJohn Johansen return af_select(sock->sk->sk_family, 105256974a6fSJohn Johansen opt_perm(op, request, sock, level, optname), 105356974a6fSJohn Johansen aa_sk_perm(op, request, sock->sk)); 105456974a6fSJohn Johansen } 105556974a6fSJohn Johansen 105656974a6fSJohn Johansen /** 10570fc6ab40SYang Li * apparmor_socket_getsockopt - check perms before getting socket options 105856974a6fSJohn Johansen */ 105956974a6fSJohn Johansen static int apparmor_socket_getsockopt(struct socket *sock, int level, 106056974a6fSJohn Johansen int optname) 106156974a6fSJohn Johansen { 106256974a6fSJohn Johansen return aa_sock_opt_perm(OP_GETSOCKOPT, AA_MAY_GETOPT, sock, 106356974a6fSJohn Johansen level, optname); 106456974a6fSJohn Johansen } 106556974a6fSJohn Johansen 106656974a6fSJohn Johansen /** 10670fc6ab40SYang Li * apparmor_socket_setsockopt - check perms before setting socket options 106856974a6fSJohn Johansen */ 106956974a6fSJohn Johansen static int apparmor_socket_setsockopt(struct socket *sock, int level, 107056974a6fSJohn Johansen int optname) 107156974a6fSJohn Johansen { 107256974a6fSJohn Johansen return aa_sock_opt_perm(OP_SETSOCKOPT, AA_MAY_SETOPT, sock, 107356974a6fSJohn Johansen level, optname); 107456974a6fSJohn Johansen } 107556974a6fSJohn Johansen 107656974a6fSJohn Johansen /** 107756974a6fSJohn Johansen * apparmor_socket_shutdown - check perms before shutting down @sock conn 107856974a6fSJohn Johansen */ 107956974a6fSJohn Johansen static int apparmor_socket_shutdown(struct socket *sock, int how) 108056974a6fSJohn Johansen { 108156974a6fSJohn Johansen return aa_sock_perm(OP_SHUTDOWN, AA_MAY_SHUTDOWN, sock); 108256974a6fSJohn Johansen } 108356974a6fSJohn Johansen 1084e1af4779SArnd Bergmann #ifdef CONFIG_NETWORK_SECMARK 108556974a6fSJohn Johansen /** 10860fc6ab40SYang Li * apparmor_socket_sock_rcv_skb - check perms before associating skb to sk 108756974a6fSJohn Johansen * 108856974a6fSJohn Johansen * Note: can not sleep may be called with locks held 108956974a6fSJohn Johansen * 109056974a6fSJohn Johansen * dont want protocol specific in __skb_recv_datagram() 109156974a6fSJohn Johansen * to deny an incoming connection socket_sock_rcv_skb() 109256974a6fSJohn Johansen */ 109356974a6fSJohn Johansen static int apparmor_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) 109456974a6fSJohn Johansen { 1095ab9f2115SMatthew Garrett struct aa_sk_ctx *ctx = SK_CTX(sk); 1096ab9f2115SMatthew Garrett 1097ab9f2115SMatthew Garrett if (!skb->secmark) 109856974a6fSJohn Johansen return 0; 1099ab9f2115SMatthew Garrett 1100ab9f2115SMatthew Garrett return apparmor_secmark_check(ctx->label, OP_RECVMSG, AA_MAY_RECEIVE, 1101ab9f2115SMatthew Garrett skb->secmark, sk); 110256974a6fSJohn Johansen } 1103e1af4779SArnd Bergmann #endif 110456974a6fSJohn Johansen 110556974a6fSJohn Johansen 110656974a6fSJohn Johansen static struct aa_label *sk_peer_label(struct sock *sk) 110756974a6fSJohn Johansen { 110856974a6fSJohn Johansen struct aa_sk_ctx *ctx = SK_CTX(sk); 110956974a6fSJohn Johansen 111056974a6fSJohn Johansen if (ctx->peer) 111156974a6fSJohn Johansen return ctx->peer; 111256974a6fSJohn Johansen 111356974a6fSJohn Johansen return ERR_PTR(-ENOPROTOOPT); 111456974a6fSJohn Johansen } 111556974a6fSJohn Johansen 111656974a6fSJohn Johansen /** 111756974a6fSJohn Johansen * apparmor_socket_getpeersec_stream - get security context of peer 111856974a6fSJohn Johansen * 111956974a6fSJohn Johansen * Note: for tcp only valid if using ipsec or cipso on lan 112056974a6fSJohn Johansen */ 112156974a6fSJohn Johansen static int apparmor_socket_getpeersec_stream(struct socket *sock, 1122b10b9c34SPaul Moore sockptr_t optval, sockptr_t optlen, 112356974a6fSJohn Johansen unsigned int len) 112456974a6fSJohn Johansen { 1125b10b9c34SPaul Moore char *name = NULL; 112656974a6fSJohn Johansen int slen, error = 0; 112756974a6fSJohn Johansen struct aa_label *label; 112856974a6fSJohn Johansen struct aa_label *peer; 112956974a6fSJohn Johansen 113056974a6fSJohn Johansen label = begin_current_label_crit_section(); 113156974a6fSJohn Johansen peer = sk_peer_label(sock->sk); 113256974a6fSJohn Johansen if (IS_ERR(peer)) { 113356974a6fSJohn Johansen error = PTR_ERR(peer); 113456974a6fSJohn Johansen goto done; 113556974a6fSJohn Johansen } 113656974a6fSJohn Johansen slen = aa_label_asxprint(&name, labels_ns(label), peer, 113756974a6fSJohn Johansen FLAG_SHOW_MODE | FLAG_VIEW_SUBNS | 113856974a6fSJohn Johansen FLAG_HIDDEN_UNCONFINED, GFP_KERNEL); 113956974a6fSJohn Johansen /* don't include terminating \0 in slen, it breaks some apps */ 114056974a6fSJohn Johansen if (slen < 0) { 114156974a6fSJohn Johansen error = -ENOMEM; 1142b10b9c34SPaul Moore goto done; 1143b10b9c34SPaul Moore } 114456974a6fSJohn Johansen if (slen > len) { 114556974a6fSJohn Johansen error = -ERANGE; 1146b10b9c34SPaul Moore goto done_len; 114756974a6fSJohn Johansen } 114856974a6fSJohn Johansen 1149b10b9c34SPaul Moore if (copy_to_sockptr(optval, name, slen)) 1150b10b9c34SPaul Moore error = -EFAULT; 1151b10b9c34SPaul Moore done_len: 1152b10b9c34SPaul Moore if (copy_to_sockptr(optlen, &slen, sizeof(slen))) 1153b10b9c34SPaul Moore error = -EFAULT; 115456974a6fSJohn Johansen done: 115556974a6fSJohn Johansen end_current_label_crit_section(label); 1156b10b9c34SPaul Moore kfree(name); 115756974a6fSJohn Johansen return error; 115856974a6fSJohn Johansen } 115956974a6fSJohn Johansen 116056974a6fSJohn Johansen /** 116156974a6fSJohn Johansen * apparmor_socket_getpeersec_dgram - get security label of packet 116256974a6fSJohn Johansen * @sock: the peer socket 116356974a6fSJohn Johansen * @skb: packet data 116456974a6fSJohn Johansen * @secid: pointer to where to put the secid of the packet 116556974a6fSJohn Johansen * 116656974a6fSJohn Johansen * Sets the netlabel socket state on sk from parent 116756974a6fSJohn Johansen */ 116856974a6fSJohn Johansen static int apparmor_socket_getpeersec_dgram(struct socket *sock, 116956974a6fSJohn Johansen struct sk_buff *skb, u32 *secid) 117056974a6fSJohn Johansen 117156974a6fSJohn Johansen { 117256974a6fSJohn Johansen /* TODO: requires secid support */ 117356974a6fSJohn Johansen return -ENOPROTOOPT; 117456974a6fSJohn Johansen } 117556974a6fSJohn Johansen 117656974a6fSJohn Johansen /** 117756974a6fSJohn Johansen * apparmor_sock_graft - Initialize newly created socket 117856974a6fSJohn Johansen * @sk: child sock 117956974a6fSJohn Johansen * @parent: parent socket 118056974a6fSJohn Johansen * 118156974a6fSJohn Johansen * Note: could set off of SOCK_CTX(parent) but need to track inode and we can 118256974a6fSJohn Johansen * just set sk security information off of current creating process label 118356974a6fSJohn Johansen * Labeling of sk for accept case - probably should be sock based 118456974a6fSJohn Johansen * instead of task, because of the case where an implicitly labeled 118556974a6fSJohn Johansen * socket is shared by different tasks. 118656974a6fSJohn Johansen */ 118756974a6fSJohn Johansen static void apparmor_sock_graft(struct sock *sk, struct socket *parent) 118856974a6fSJohn Johansen { 118956974a6fSJohn Johansen struct aa_sk_ctx *ctx = SK_CTX(sk); 119056974a6fSJohn Johansen 119156974a6fSJohn Johansen if (!ctx->label) 119256974a6fSJohn Johansen ctx->label = aa_get_current_label(); 119356974a6fSJohn Johansen } 119456974a6fSJohn Johansen 1195e1af4779SArnd Bergmann #ifdef CONFIG_NETWORK_SECMARK 119641dd9596SFlorian Westphal static int apparmor_inet_conn_request(const struct sock *sk, struct sk_buff *skb, 1197ab9f2115SMatthew Garrett struct request_sock *req) 1198ab9f2115SMatthew Garrett { 1199ab9f2115SMatthew Garrett struct aa_sk_ctx *ctx = SK_CTX(sk); 1200ab9f2115SMatthew Garrett 1201ab9f2115SMatthew Garrett if (!skb->secmark) 1202ab9f2115SMatthew Garrett return 0; 1203ab9f2115SMatthew Garrett 1204ab9f2115SMatthew Garrett return apparmor_secmark_check(ctx->label, OP_CONNECT, AA_MAY_CONNECT, 1205ab9f2115SMatthew Garrett skb->secmark, sk); 1206ab9f2115SMatthew Garrett } 1207e1af4779SArnd Bergmann #endif 1208ab9f2115SMatthew Garrett 1209bbd3662aSCasey Schaufler /* 121037923d43SXiu Jianfeng * The cred blob is a pointer to, not an instance of, an aa_label. 1211bbd3662aSCasey Schaufler */ 1212bbd3662aSCasey Schaufler struct lsm_blob_sizes apparmor_blob_sizes __lsm_ro_after_init = { 121337923d43SXiu Jianfeng .lbs_cred = sizeof(struct aa_label *), 121433bf60caSCasey Schaufler .lbs_file = sizeof(struct aa_file_ctx), 1215f4ad8f2cSCasey Schaufler .lbs_task = sizeof(struct aa_task_ctx), 1216bbd3662aSCasey Schaufler }; 1217bbd3662aSCasey Schaufler 1218ca97d939SJames Morris static struct security_hook_list apparmor_hooks[] __lsm_ro_after_init = { 1219e20b043aSCasey Schaufler LSM_HOOK_INIT(ptrace_access_check, apparmor_ptrace_access_check), 1220e20b043aSCasey Schaufler LSM_HOOK_INIT(ptrace_traceme, apparmor_ptrace_traceme), 1221e20b043aSCasey Schaufler LSM_HOOK_INIT(capget, apparmor_capget), 1222e20b043aSCasey Schaufler LSM_HOOK_INIT(capable, apparmor_capable), 1223b5e95b48SJohn Johansen 12242ea3ffb7SJohn Johansen LSM_HOOK_INIT(sb_mount, apparmor_sb_mount), 12252ea3ffb7SJohn Johansen LSM_HOOK_INIT(sb_umount, apparmor_sb_umount), 12262ea3ffb7SJohn Johansen LSM_HOOK_INIT(sb_pivotroot, apparmor_sb_pivotroot), 12272ea3ffb7SJohn Johansen 1228e20b043aSCasey Schaufler LSM_HOOK_INIT(path_link, apparmor_path_link), 1229e20b043aSCasey Schaufler LSM_HOOK_INIT(path_unlink, apparmor_path_unlink), 1230e20b043aSCasey Schaufler LSM_HOOK_INIT(path_symlink, apparmor_path_symlink), 1231e20b043aSCasey Schaufler LSM_HOOK_INIT(path_mkdir, apparmor_path_mkdir), 1232e20b043aSCasey Schaufler LSM_HOOK_INIT(path_rmdir, apparmor_path_rmdir), 1233e20b043aSCasey Schaufler LSM_HOOK_INIT(path_mknod, apparmor_path_mknod), 1234e20b043aSCasey Schaufler LSM_HOOK_INIT(path_rename, apparmor_path_rename), 1235e20b043aSCasey Schaufler LSM_HOOK_INIT(path_chmod, apparmor_path_chmod), 1236e20b043aSCasey Schaufler LSM_HOOK_INIT(path_chown, apparmor_path_chown), 1237e20b043aSCasey Schaufler LSM_HOOK_INIT(path_truncate, apparmor_path_truncate), 1238e20b043aSCasey Schaufler LSM_HOOK_INIT(inode_getattr, apparmor_inode_getattr), 1239b5e95b48SJohn Johansen 1240e20b043aSCasey Schaufler LSM_HOOK_INIT(file_open, apparmor_file_open), 1241064dc947SJohn Johansen LSM_HOOK_INIT(file_receive, apparmor_file_receive), 1242e20b043aSCasey Schaufler LSM_HOOK_INIT(file_permission, apparmor_file_permission), 1243e20b043aSCasey Schaufler LSM_HOOK_INIT(file_alloc_security, apparmor_file_alloc_security), 1244e20b043aSCasey Schaufler LSM_HOOK_INIT(file_free_security, apparmor_file_free_security), 1245e20b043aSCasey Schaufler LSM_HOOK_INIT(mmap_file, apparmor_mmap_file), 1246e20b043aSCasey Schaufler LSM_HOOK_INIT(file_mprotect, apparmor_file_mprotect), 1247e20b043aSCasey Schaufler LSM_HOOK_INIT(file_lock, apparmor_file_lock), 12483350607dSGünther Noack LSM_HOOK_INIT(file_truncate, apparmor_file_truncate), 1249b5e95b48SJohn Johansen 1250e20b043aSCasey Schaufler LSM_HOOK_INIT(getprocattr, apparmor_getprocattr), 1251e20b043aSCasey Schaufler LSM_HOOK_INIT(setprocattr, apparmor_setprocattr), 1252b5e95b48SJohn Johansen 125356974a6fSJohn Johansen LSM_HOOK_INIT(sk_alloc_security, apparmor_sk_alloc_security), 125456974a6fSJohn Johansen LSM_HOOK_INIT(sk_free_security, apparmor_sk_free_security), 125556974a6fSJohn Johansen LSM_HOOK_INIT(sk_clone_security, apparmor_sk_clone_security), 125656974a6fSJohn Johansen 125756974a6fSJohn Johansen LSM_HOOK_INIT(socket_create, apparmor_socket_create), 125856974a6fSJohn Johansen LSM_HOOK_INIT(socket_post_create, apparmor_socket_post_create), 125956974a6fSJohn Johansen LSM_HOOK_INIT(socket_bind, apparmor_socket_bind), 126056974a6fSJohn Johansen LSM_HOOK_INIT(socket_connect, apparmor_socket_connect), 126156974a6fSJohn Johansen LSM_HOOK_INIT(socket_listen, apparmor_socket_listen), 126256974a6fSJohn Johansen LSM_HOOK_INIT(socket_accept, apparmor_socket_accept), 126356974a6fSJohn Johansen LSM_HOOK_INIT(socket_sendmsg, apparmor_socket_sendmsg), 126456974a6fSJohn Johansen LSM_HOOK_INIT(socket_recvmsg, apparmor_socket_recvmsg), 126556974a6fSJohn Johansen LSM_HOOK_INIT(socket_getsockname, apparmor_socket_getsockname), 126656974a6fSJohn Johansen LSM_HOOK_INIT(socket_getpeername, apparmor_socket_getpeername), 126756974a6fSJohn Johansen LSM_HOOK_INIT(socket_getsockopt, apparmor_socket_getsockopt), 126856974a6fSJohn Johansen LSM_HOOK_INIT(socket_setsockopt, apparmor_socket_setsockopt), 126956974a6fSJohn Johansen LSM_HOOK_INIT(socket_shutdown, apparmor_socket_shutdown), 1270e1af4779SArnd Bergmann #ifdef CONFIG_NETWORK_SECMARK 127156974a6fSJohn Johansen LSM_HOOK_INIT(socket_sock_rcv_skb, apparmor_socket_sock_rcv_skb), 1272e1af4779SArnd Bergmann #endif 127356974a6fSJohn Johansen LSM_HOOK_INIT(socket_getpeersec_stream, 127456974a6fSJohn Johansen apparmor_socket_getpeersec_stream), 127556974a6fSJohn Johansen LSM_HOOK_INIT(socket_getpeersec_dgram, 127656974a6fSJohn Johansen apparmor_socket_getpeersec_dgram), 127756974a6fSJohn Johansen LSM_HOOK_INIT(sock_graft, apparmor_sock_graft), 1278e1af4779SArnd Bergmann #ifdef CONFIG_NETWORK_SECMARK 1279ab9f2115SMatthew Garrett LSM_HOOK_INIT(inet_conn_request, apparmor_inet_conn_request), 1280e1af4779SArnd Bergmann #endif 128156974a6fSJohn Johansen 1282e20b043aSCasey Schaufler LSM_HOOK_INIT(cred_alloc_blank, apparmor_cred_alloc_blank), 1283e20b043aSCasey Schaufler LSM_HOOK_INIT(cred_free, apparmor_cred_free), 1284e20b043aSCasey Schaufler LSM_HOOK_INIT(cred_prepare, apparmor_cred_prepare), 1285e20b043aSCasey Schaufler LSM_HOOK_INIT(cred_transfer, apparmor_cred_transfer), 1286b5e95b48SJohn Johansen 1287b8bff599SEric W. Biederman LSM_HOOK_INIT(bprm_creds_for_exec, apparmor_bprm_creds_for_exec), 1288e20b043aSCasey Schaufler LSM_HOOK_INIT(bprm_committing_creds, apparmor_bprm_committing_creds), 1289e20b043aSCasey Schaufler LSM_HOOK_INIT(bprm_committed_creds, apparmor_bprm_committed_creds), 1290b5e95b48SJohn Johansen 12913b529a76SJohn Johansen LSM_HOOK_INIT(task_free, apparmor_task_free), 12923b529a76SJohn Johansen LSM_HOOK_INIT(task_alloc, apparmor_task_alloc), 12936326948fSPaul Moore LSM_HOOK_INIT(current_getsecid_subj, apparmor_current_getsecid_subj), 12946326948fSPaul Moore LSM_HOOK_INIT(task_getsecid_obj, apparmor_task_getsecid_obj), 1295e20b043aSCasey Schaufler LSM_HOOK_INIT(task_setrlimit, apparmor_task_setrlimit), 1296cd1dbf76SJohn Johansen LSM_HOOK_INIT(task_kill, apparmor_task_kill), 1297c0929212SJohn Johansen 1298e79c26d0SMatthew Garrett #ifdef CONFIG_AUDIT 1299e79c26d0SMatthew Garrett LSM_HOOK_INIT(audit_rule_init, aa_audit_rule_init), 1300e79c26d0SMatthew Garrett LSM_HOOK_INIT(audit_rule_known, aa_audit_rule_known), 1301e79c26d0SMatthew Garrett LSM_HOOK_INIT(audit_rule_match, aa_audit_rule_match), 1302e79c26d0SMatthew Garrett LSM_HOOK_INIT(audit_rule_free, aa_audit_rule_free), 1303e79c26d0SMatthew Garrett #endif 1304e79c26d0SMatthew Garrett 1305c0929212SJohn Johansen LSM_HOOK_INIT(secid_to_secctx, apparmor_secid_to_secctx), 1306c0929212SJohn Johansen LSM_HOOK_INIT(secctx_to_secid, apparmor_secctx_to_secid), 1307c0929212SJohn Johansen LSM_HOOK_INIT(release_secctx, apparmor_release_secctx), 1308b5e95b48SJohn Johansen }; 1309b5e95b48SJohn Johansen 1310b5e95b48SJohn Johansen /* 1311b5e95b48SJohn Johansen * AppArmor sysfs module parameters 1312b5e95b48SJohn Johansen */ 1313b5e95b48SJohn Johansen 1314101d6c82SStephen Rothwell static int param_set_aabool(const char *val, const struct kernel_param *kp); 1315101d6c82SStephen Rothwell static int param_get_aabool(char *buffer, const struct kernel_param *kp); 1316b8aa09fdSRusty Russell #define param_check_aabool param_check_bool 13179c27847dSLuis R. Rodriguez static const struct kernel_param_ops param_ops_aabool = { 13186a4c2643SJani Nikula .flags = KERNEL_PARAM_OPS_FL_NOARG, 1319101d6c82SStephen Rothwell .set = param_set_aabool, 1320101d6c82SStephen Rothwell .get = param_get_aabool 1321101d6c82SStephen Rothwell }; 1322b5e95b48SJohn Johansen 1323101d6c82SStephen Rothwell static int param_set_aauint(const char *val, const struct kernel_param *kp); 1324101d6c82SStephen Rothwell static int param_get_aauint(char *buffer, const struct kernel_param *kp); 1325b8aa09fdSRusty Russell #define param_check_aauint param_check_uint 13269c27847dSLuis R. Rodriguez static const struct kernel_param_ops param_ops_aauint = { 1327101d6c82SStephen Rothwell .set = param_set_aauint, 1328101d6c82SStephen Rothwell .get = param_get_aauint 1329101d6c82SStephen Rothwell }; 1330b5e95b48SJohn Johansen 133163c16c3aSChris Coulson static int param_set_aacompressionlevel(const char *val, 133263c16c3aSChris Coulson const struct kernel_param *kp); 133363c16c3aSChris Coulson static int param_get_aacompressionlevel(char *buffer, 133463c16c3aSChris Coulson const struct kernel_param *kp); 133563c16c3aSChris Coulson #define param_check_aacompressionlevel param_check_int 133663c16c3aSChris Coulson static const struct kernel_param_ops param_ops_aacompressionlevel = { 133763c16c3aSChris Coulson .set = param_set_aacompressionlevel, 133863c16c3aSChris Coulson .get = param_get_aacompressionlevel 133963c16c3aSChris Coulson }; 134063c16c3aSChris Coulson 1341101d6c82SStephen Rothwell static int param_set_aalockpolicy(const char *val, const struct kernel_param *kp); 1342101d6c82SStephen Rothwell static int param_get_aalockpolicy(char *buffer, const struct kernel_param *kp); 1343b8aa09fdSRusty Russell #define param_check_aalockpolicy param_check_bool 13449c27847dSLuis R. Rodriguez static const struct kernel_param_ops param_ops_aalockpolicy = { 13456a4c2643SJani Nikula .flags = KERNEL_PARAM_OPS_FL_NOARG, 1346101d6c82SStephen Rothwell .set = param_set_aalockpolicy, 1347101d6c82SStephen Rothwell .get = param_get_aalockpolicy 1348101d6c82SStephen Rothwell }; 1349b5e95b48SJohn Johansen 1350e4dca7b7SKees Cook static int param_set_audit(const char *val, const struct kernel_param *kp); 1351e4dca7b7SKees Cook static int param_get_audit(char *buffer, const struct kernel_param *kp); 1352b5e95b48SJohn Johansen 1353e4dca7b7SKees Cook static int param_set_mode(const char *val, const struct kernel_param *kp); 1354e4dca7b7SKees Cook static int param_get_mode(char *buffer, const struct kernel_param *kp); 1355b5e95b48SJohn Johansen 1356b5e95b48SJohn Johansen /* Flag values, also controllable via /sys/module/apparmor/parameters 1357b5e95b48SJohn Johansen * We define special types as we want to do additional mediation. 1358b5e95b48SJohn Johansen */ 1359b5e95b48SJohn Johansen 1360b5e95b48SJohn Johansen /* AppArmor global enforcement switch - complain, enforce, kill */ 1361b5e95b48SJohn Johansen enum profile_mode aa_g_profile_mode = APPARMOR_ENFORCE; 1362b5e95b48SJohn Johansen module_param_call(mode, param_set_mode, param_get_mode, 1363b5e95b48SJohn Johansen &aa_g_profile_mode, S_IRUSR | S_IWUSR); 1364b5e95b48SJohn Johansen 13656059f71fSJohn Johansen /* whether policy verification hashing is enabled */ 13667616ac70SArnd Bergmann bool aa_g_hash_policy = IS_ENABLED(CONFIG_SECURITY_APPARMOR_HASH_DEFAULT); 13673ccb76c5SJohn Johansen #ifdef CONFIG_SECURITY_APPARMOR_HASH 13686059f71fSJohn Johansen module_param_named(hash_policy, aa_g_hash_policy, aabool, S_IRUSR | S_IWUSR); 13697616ac70SArnd Bergmann #endif 13706059f71fSJohn Johansen 1371d61c57fdSJohn Johansen /* whether policy exactly as loaded is retained for debug and checkpointing */ 1372d61c57fdSJohn Johansen bool aa_g_export_binary = IS_ENABLED(CONFIG_SECURITY_APPARMOR_EXPORT_BINARY); 1373d61c57fdSJohn Johansen #ifdef CONFIG_SECURITY_APPARMOR_EXPORT_BINARY 1374d61c57fdSJohn Johansen module_param_named(export_binary, aa_g_export_binary, aabool, 0600); 1375d61c57fdSJohn Johansen #endif 1376d61c57fdSJohn Johansen 137763c16c3aSChris Coulson /* policy loaddata compression level */ 137870f24a9fSJohn Johansen int aa_g_rawdata_compression_level = AA_DEFAULT_CLEVEL; 137963c16c3aSChris Coulson module_param_named(rawdata_compression_level, aa_g_rawdata_compression_level, 138063c16c3aSChris Coulson aacompressionlevel, 0400); 138163c16c3aSChris Coulson 1382b5e95b48SJohn Johansen /* Debug mode */ 1383eea7a05fSValentin Rothberg bool aa_g_debug = IS_ENABLED(CONFIG_SECURITY_APPARMOR_DEBUG_MESSAGES); 1384b5e95b48SJohn Johansen module_param_named(debug, aa_g_debug, aabool, S_IRUSR | S_IWUSR); 1385b5e95b48SJohn Johansen 1386b5e95b48SJohn Johansen /* Audit mode */ 1387b5e95b48SJohn Johansen enum audit_mode aa_g_audit; 1388b5e95b48SJohn Johansen module_param_call(audit, param_set_audit, param_get_audit, 1389b5e95b48SJohn Johansen &aa_g_audit, S_IRUSR | S_IWUSR); 1390b5e95b48SJohn Johansen 1391b5e95b48SJohn Johansen /* Determines if audit header is included in audited messages. This 1392b5e95b48SJohn Johansen * provides more context if the audit daemon is not running 1393b5e95b48SJohn Johansen */ 1394954317feSThomas Meyer bool aa_g_audit_header = true; 1395b5e95b48SJohn Johansen module_param_named(audit_header, aa_g_audit_header, aabool, 1396b5e95b48SJohn Johansen S_IRUSR | S_IWUSR); 1397b5e95b48SJohn Johansen 1398b5e95b48SJohn Johansen /* lock out loading/removal of policy 1399b5e95b48SJohn Johansen * TODO: add in at boot loading of policy, which is the only way to 1400b5e95b48SJohn Johansen * load policy, if lock_policy is set 1401b5e95b48SJohn Johansen */ 140290ab5ee9SRusty Russell bool aa_g_lock_policy; 1403b5e95b48SJohn Johansen module_param_named(lock_policy, aa_g_lock_policy, aalockpolicy, 1404b5e95b48SJohn Johansen S_IRUSR | S_IWUSR); 1405b5e95b48SJohn Johansen 1406b5e95b48SJohn Johansen /* Syscall logging mode */ 140790ab5ee9SRusty Russell bool aa_g_logsyscall; 1408b5e95b48SJohn Johansen module_param_named(logsyscall, aa_g_logsyscall, aabool, S_IRUSR | S_IWUSR); 1409b5e95b48SJohn Johansen 1410b5e95b48SJohn Johansen /* Maximum pathname length before accesses will start getting rejected */ 1411b5e95b48SJohn Johansen unsigned int aa_g_path_max = 2 * PATH_MAX; 1412622f6e32SJohn Johansen module_param_named(path_max, aa_g_path_max, aauint, S_IRUSR); 1413b5e95b48SJohn Johansen 1414b5e95b48SJohn Johansen /* Determines how paranoid loading of policy is and how much verification 1415b5e95b48SJohn Johansen * on the loaded policy is done. 1416abbf8734SJohn Johansen * DEPRECATED: read only as strict checking of load is always done now 1417abbf8734SJohn Johansen * that none root users (user namespaces) can load policy. 1418b5e95b48SJohn Johansen */ 141979eb2711SLukas Bulwahn bool aa_g_paranoid_load = IS_ENABLED(CONFIG_SECURITY_APPARMOR_PARANOID_LOAD); 1420abbf8734SJohn Johansen module_param_named(paranoid_load, aa_g_paranoid_load, aabool, S_IRUGO); 1421b5e95b48SJohn Johansen 1422e33c1b99SKees Cook static int param_get_aaintbool(char *buffer, const struct kernel_param *kp); 1423e33c1b99SKees Cook static int param_set_aaintbool(const char *val, const struct kernel_param *kp); 1424e33c1b99SKees Cook #define param_check_aaintbool param_check_int 1425e33c1b99SKees Cook static const struct kernel_param_ops param_ops_aaintbool = { 1426e33c1b99SKees Cook .set = param_set_aaintbool, 1427e33c1b99SKees Cook .get = param_get_aaintbool 1428e33c1b99SKees Cook }; 1429b5e95b48SJohn Johansen /* Boot time disable flag */ 14300102fb83SKees Cook static int apparmor_enabled __lsm_ro_after_init = 1; 1431e33c1b99SKees Cook module_param_named(enabled, apparmor_enabled, aaintbool, 0444); 1432b5e95b48SJohn Johansen 1433b5e95b48SJohn Johansen static int __init apparmor_enabled_setup(char *str) 1434b5e95b48SJohn Johansen { 1435b5e95b48SJohn Johansen unsigned long enabled; 143629707b20SJingoo Han int error = kstrtoul(str, 0, &enabled); 1437b5e95b48SJohn Johansen if (!error) 1438b5e95b48SJohn Johansen apparmor_enabled = enabled ? 1 : 0; 1439b5e95b48SJohn Johansen return 1; 1440b5e95b48SJohn Johansen } 1441b5e95b48SJohn Johansen 1442b5e95b48SJohn Johansen __setup("apparmor=", apparmor_enabled_setup); 1443b5e95b48SJohn Johansen 1444b5e95b48SJohn Johansen /* set global flag turning off the ability to load policy */ 1445101d6c82SStephen Rothwell static int param_set_aalockpolicy(const char *val, const struct kernel_param *kp) 1446b5e95b48SJohn Johansen { 1447545de8feSJohn Johansen if (!apparmor_enabled) 1448545de8feSJohn Johansen return -EINVAL; 144992de220aSJohn Johansen if (apparmor_initialized && !aa_current_policy_admin_capable(NULL)) 1450b5e95b48SJohn Johansen return -EPERM; 1451b5e95b48SJohn Johansen return param_set_bool(val, kp); 1452b5e95b48SJohn Johansen } 1453b5e95b48SJohn Johansen 1454101d6c82SStephen Rothwell static int param_get_aalockpolicy(char *buffer, const struct kernel_param *kp) 1455b5e95b48SJohn Johansen { 1456ca4bd5aeSJohn Johansen if (!apparmor_enabled) 1457ca4bd5aeSJohn Johansen return -EINVAL; 145892de220aSJohn Johansen if (apparmor_initialized && !aa_current_policy_view_capable(NULL)) 1459545de8feSJohn Johansen return -EPERM; 1460b5e95b48SJohn Johansen return param_get_bool(buffer, kp); 1461b5e95b48SJohn Johansen } 1462b5e95b48SJohn Johansen 1463101d6c82SStephen Rothwell static int param_set_aabool(const char *val, const struct kernel_param *kp) 1464b5e95b48SJohn Johansen { 1465ca4bd5aeSJohn Johansen if (!apparmor_enabled) 1466ca4bd5aeSJohn Johansen return -EINVAL; 146792de220aSJohn Johansen if (apparmor_initialized && !aa_current_policy_admin_capable(NULL)) 1468545de8feSJohn Johansen return -EPERM; 1469b5e95b48SJohn Johansen return param_set_bool(val, kp); 1470b5e95b48SJohn Johansen } 1471b5e95b48SJohn Johansen 1472101d6c82SStephen Rothwell static int param_get_aabool(char *buffer, const struct kernel_param *kp) 1473b5e95b48SJohn Johansen { 1474ca4bd5aeSJohn Johansen if (!apparmor_enabled) 1475ca4bd5aeSJohn Johansen return -EINVAL; 147692de220aSJohn Johansen if (apparmor_initialized && !aa_current_policy_view_capable(NULL)) 1477545de8feSJohn Johansen return -EPERM; 1478b5e95b48SJohn Johansen return param_get_bool(buffer, kp); 1479b5e95b48SJohn Johansen } 1480b5e95b48SJohn Johansen 1481101d6c82SStephen Rothwell static int param_set_aauint(const char *val, const struct kernel_param *kp) 1482b5e95b48SJohn Johansen { 148339d84824SJohn Johansen int error; 148439d84824SJohn Johansen 1485ca4bd5aeSJohn Johansen if (!apparmor_enabled) 1486ca4bd5aeSJohn Johansen return -EINVAL; 148739d84824SJohn Johansen /* file is ro but enforce 2nd line check */ 148839d84824SJohn Johansen if (apparmor_initialized) 1489545de8feSJohn Johansen return -EPERM; 149039d84824SJohn Johansen 149139d84824SJohn Johansen error = param_set_uint(val, kp); 1492df323337SSebastian Andrzej Siewior aa_g_path_max = max_t(uint32_t, aa_g_path_max, sizeof(union aa_buffer)); 149339d84824SJohn Johansen pr_info("AppArmor: buffer size set to %d bytes\n", aa_g_path_max); 149439d84824SJohn Johansen 149539d84824SJohn Johansen return error; 1496b5e95b48SJohn Johansen } 1497b5e95b48SJohn Johansen 1498101d6c82SStephen Rothwell static int param_get_aauint(char *buffer, const struct kernel_param *kp) 1499b5e95b48SJohn Johansen { 1500ca4bd5aeSJohn Johansen if (!apparmor_enabled) 1501ca4bd5aeSJohn Johansen return -EINVAL; 150292de220aSJohn Johansen if (apparmor_initialized && !aa_current_policy_view_capable(NULL)) 1503545de8feSJohn Johansen return -EPERM; 1504b5e95b48SJohn Johansen return param_get_uint(buffer, kp); 1505b5e95b48SJohn Johansen } 1506b5e95b48SJohn Johansen 1507e33c1b99SKees Cook /* Can only be set before AppArmor is initialized (i.e. on boot cmdline). */ 1508e33c1b99SKees Cook static int param_set_aaintbool(const char *val, const struct kernel_param *kp) 1509e33c1b99SKees Cook { 1510e33c1b99SKees Cook struct kernel_param kp_local; 1511e33c1b99SKees Cook bool value; 1512e33c1b99SKees Cook int error; 1513e33c1b99SKees Cook 1514e33c1b99SKees Cook if (apparmor_initialized) 1515e33c1b99SKees Cook return -EPERM; 1516e33c1b99SKees Cook 1517e33c1b99SKees Cook /* Create local copy, with arg pointing to bool type. */ 1518e33c1b99SKees Cook value = !!*((int *)kp->arg); 1519e33c1b99SKees Cook memcpy(&kp_local, kp, sizeof(kp_local)); 1520e33c1b99SKees Cook kp_local.arg = &value; 1521e33c1b99SKees Cook 1522e33c1b99SKees Cook error = param_set_bool(val, &kp_local); 1523e33c1b99SKees Cook if (!error) 1524e33c1b99SKees Cook *((int *)kp->arg) = *((bool *)kp_local.arg); 1525e33c1b99SKees Cook return error; 1526e33c1b99SKees Cook } 1527e33c1b99SKees Cook 1528e33c1b99SKees Cook /* 1529e33c1b99SKees Cook * To avoid changing /sys/module/apparmor/parameters/enabled from Y/N to 1530e33c1b99SKees Cook * 1/0, this converts the "int that is actually bool" back to bool for 1531e33c1b99SKees Cook * display in the /sys filesystem, while keeping it "int" for the LSM 1532e33c1b99SKees Cook * infrastructure. 1533e33c1b99SKees Cook */ 1534e33c1b99SKees Cook static int param_get_aaintbool(char *buffer, const struct kernel_param *kp) 1535e33c1b99SKees Cook { 1536e33c1b99SKees Cook struct kernel_param kp_local; 1537e33c1b99SKees Cook bool value; 1538e33c1b99SKees Cook 1539e33c1b99SKees Cook /* Create local copy, with arg pointing to bool type. */ 1540e33c1b99SKees Cook value = !!*((int *)kp->arg); 1541e33c1b99SKees Cook memcpy(&kp_local, kp, sizeof(kp_local)); 1542e33c1b99SKees Cook kp_local.arg = &value; 1543e33c1b99SKees Cook 1544e33c1b99SKees Cook return param_get_bool(buffer, &kp_local); 1545e33c1b99SKees Cook } 1546e33c1b99SKees Cook 154763c16c3aSChris Coulson static int param_set_aacompressionlevel(const char *val, 154863c16c3aSChris Coulson const struct kernel_param *kp) 154963c16c3aSChris Coulson { 155063c16c3aSChris Coulson int error; 155163c16c3aSChris Coulson 155263c16c3aSChris Coulson if (!apparmor_enabled) 155363c16c3aSChris Coulson return -EINVAL; 155463c16c3aSChris Coulson if (apparmor_initialized) 155563c16c3aSChris Coulson return -EPERM; 155663c16c3aSChris Coulson 155763c16c3aSChris Coulson error = param_set_int(val, kp); 155863c16c3aSChris Coulson 155963c16c3aSChris Coulson aa_g_rawdata_compression_level = clamp(aa_g_rawdata_compression_level, 156070f24a9fSJohn Johansen AA_MIN_CLEVEL, AA_MAX_CLEVEL); 1561f4d6b94bSJon Tourville pr_info("AppArmor: policy rawdata compression level set to %d\n", 156263c16c3aSChris Coulson aa_g_rawdata_compression_level); 156363c16c3aSChris Coulson 156463c16c3aSChris Coulson return error; 156563c16c3aSChris Coulson } 156663c16c3aSChris Coulson 156763c16c3aSChris Coulson static int param_get_aacompressionlevel(char *buffer, 156863c16c3aSChris Coulson const struct kernel_param *kp) 156963c16c3aSChris Coulson { 157063c16c3aSChris Coulson if (!apparmor_enabled) 157163c16c3aSChris Coulson return -EINVAL; 157292de220aSJohn Johansen if (apparmor_initialized && !aa_current_policy_view_capable(NULL)) 157363c16c3aSChris Coulson return -EPERM; 157463c16c3aSChris Coulson return param_get_int(buffer, kp); 157563c16c3aSChris Coulson } 157663c16c3aSChris Coulson 1577e4dca7b7SKees Cook static int param_get_audit(char *buffer, const struct kernel_param *kp) 1578b5e95b48SJohn Johansen { 1579b5e95b48SJohn Johansen if (!apparmor_enabled) 1580b5e95b48SJohn Johansen return -EINVAL; 158192de220aSJohn Johansen if (apparmor_initialized && !aa_current_policy_view_capable(NULL)) 1582545de8feSJohn Johansen return -EPERM; 1583b5e95b48SJohn Johansen return sprintf(buffer, "%s", audit_mode_names[aa_g_audit]); 1584b5e95b48SJohn Johansen } 1585b5e95b48SJohn Johansen 1586e4dca7b7SKees Cook static int param_set_audit(const char *val, const struct kernel_param *kp) 1587b5e95b48SJohn Johansen { 1588b5e95b48SJohn Johansen int i; 1589b5e95b48SJohn Johansen 1590b5e95b48SJohn Johansen if (!apparmor_enabled) 1591b5e95b48SJohn Johansen return -EINVAL; 1592b5e95b48SJohn Johansen if (!val) 1593b5e95b48SJohn Johansen return -EINVAL; 159492de220aSJohn Johansen if (apparmor_initialized && !aa_current_policy_admin_capable(NULL)) 1595545de8feSJohn Johansen return -EPERM; 1596b5e95b48SJohn Johansen 15975d8779a5SAndy Shevchenko i = match_string(audit_mode_names, AUDIT_MAX_INDEX, val); 15985d8779a5SAndy Shevchenko if (i < 0) 15995d8779a5SAndy Shevchenko return -EINVAL; 16005d8779a5SAndy Shevchenko 1601b5e95b48SJohn Johansen aa_g_audit = i; 1602b5e95b48SJohn Johansen return 0; 1603b5e95b48SJohn Johansen } 1604b5e95b48SJohn Johansen 1605e4dca7b7SKees Cook static int param_get_mode(char *buffer, const struct kernel_param *kp) 1606b5e95b48SJohn Johansen { 1607b5e95b48SJohn Johansen if (!apparmor_enabled) 1608b5e95b48SJohn Johansen return -EINVAL; 160992de220aSJohn Johansen if (apparmor_initialized && !aa_current_policy_view_capable(NULL)) 1610545de8feSJohn Johansen return -EPERM; 1611b5e95b48SJohn Johansen 16120d259f04SJohn Johansen return sprintf(buffer, "%s", aa_profile_mode_names[aa_g_profile_mode]); 1613b5e95b48SJohn Johansen } 1614b5e95b48SJohn Johansen 1615e4dca7b7SKees Cook static int param_set_mode(const char *val, const struct kernel_param *kp) 1616b5e95b48SJohn Johansen { 1617b5e95b48SJohn Johansen int i; 1618b5e95b48SJohn Johansen 1619b5e95b48SJohn Johansen if (!apparmor_enabled) 1620b5e95b48SJohn Johansen return -EINVAL; 1621b5e95b48SJohn Johansen if (!val) 1622b5e95b48SJohn Johansen return -EINVAL; 162392de220aSJohn Johansen if (apparmor_initialized && !aa_current_policy_admin_capable(NULL)) 1624545de8feSJohn Johansen return -EPERM; 1625b5e95b48SJohn Johansen 16265d8779a5SAndy Shevchenko i = match_string(aa_profile_mode_names, APPARMOR_MODE_NAMES_MAX_INDEX, 16275d8779a5SAndy Shevchenko val); 16285d8779a5SAndy Shevchenko if (i < 0) 16295d8779a5SAndy Shevchenko return -EINVAL; 16305d8779a5SAndy Shevchenko 1631b5e95b48SJohn Johansen aa_g_profile_mode = i; 1632b5e95b48SJohn Johansen return 0; 1633b5e95b48SJohn Johansen } 1634b5e95b48SJohn Johansen 1635341c1fdaSJohn Johansen char *aa_get_buffer(bool in_atomic) 1636df323337SSebastian Andrzej Siewior { 1637df323337SSebastian Andrzej Siewior union aa_buffer *aa_buf; 1638df323337SSebastian Andrzej Siewior bool try_again = true; 1639341c1fdaSJohn Johansen gfp_t flags = (GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOWARN); 1640df323337SSebastian Andrzej Siewior 1641df323337SSebastian Andrzej Siewior retry: 1642df323337SSebastian Andrzej Siewior spin_lock(&aa_buffers_lock); 1643341c1fdaSJohn Johansen if (buffer_count > reserve_count || 1644341c1fdaSJohn Johansen (in_atomic && !list_empty(&aa_global_buffers))) { 1645df323337SSebastian Andrzej Siewior aa_buf = list_first_entry(&aa_global_buffers, union aa_buffer, 1646df323337SSebastian Andrzej Siewior list); 1647df323337SSebastian Andrzej Siewior list_del(&aa_buf->list); 1648341c1fdaSJohn Johansen buffer_count--; 1649df323337SSebastian Andrzej Siewior spin_unlock(&aa_buffers_lock); 1650df323337SSebastian Andrzej Siewior return &aa_buf->buffer[0]; 1651df323337SSebastian Andrzej Siewior } 1652341c1fdaSJohn Johansen if (in_atomic) { 1653341c1fdaSJohn Johansen /* 1654341c1fdaSJohn Johansen * out of reserve buffers and in atomic context so increase 1655341c1fdaSJohn Johansen * how many buffers to keep in reserve 1656341c1fdaSJohn Johansen */ 1657341c1fdaSJohn Johansen reserve_count++; 1658341c1fdaSJohn Johansen flags = GFP_ATOMIC; 1659341c1fdaSJohn Johansen } 1660df323337SSebastian Andrzej Siewior spin_unlock(&aa_buffers_lock); 1661df323337SSebastian Andrzej Siewior 1662341c1fdaSJohn Johansen if (!in_atomic) 1663341c1fdaSJohn Johansen might_sleep(); 1664341c1fdaSJohn Johansen aa_buf = kmalloc(aa_g_path_max, flags); 1665df323337SSebastian Andrzej Siewior if (!aa_buf) { 1666df323337SSebastian Andrzej Siewior if (try_again) { 1667df323337SSebastian Andrzej Siewior try_again = false; 1668df323337SSebastian Andrzej Siewior goto retry; 1669df323337SSebastian Andrzej Siewior } 1670df323337SSebastian Andrzej Siewior pr_warn_once("AppArmor: Failed to allocate a memory buffer.\n"); 1671df323337SSebastian Andrzej Siewior return NULL; 1672df323337SSebastian Andrzej Siewior } 1673df323337SSebastian Andrzej Siewior return &aa_buf->buffer[0]; 1674df323337SSebastian Andrzej Siewior } 1675df323337SSebastian Andrzej Siewior 1676df323337SSebastian Andrzej Siewior void aa_put_buffer(char *buf) 1677df323337SSebastian Andrzej Siewior { 1678df323337SSebastian Andrzej Siewior union aa_buffer *aa_buf; 1679df323337SSebastian Andrzej Siewior 1680df323337SSebastian Andrzej Siewior if (!buf) 1681df323337SSebastian Andrzej Siewior return; 1682df323337SSebastian Andrzej Siewior aa_buf = container_of(buf, union aa_buffer, buffer[0]); 1683df323337SSebastian Andrzej Siewior 1684df323337SSebastian Andrzej Siewior spin_lock(&aa_buffers_lock); 1685df323337SSebastian Andrzej Siewior list_add(&aa_buf->list, &aa_global_buffers); 1686341c1fdaSJohn Johansen buffer_count++; 1687df323337SSebastian Andrzej Siewior spin_unlock(&aa_buffers_lock); 1688df323337SSebastian Andrzej Siewior } 1689df323337SSebastian Andrzej Siewior 1690b5e95b48SJohn Johansen /* 1691b5e95b48SJohn Johansen * AppArmor init functions 1692b5e95b48SJohn Johansen */ 1693b5e95b48SJohn Johansen 1694b5e95b48SJohn Johansen /** 169555a26ebfSJohn Johansen * set_init_ctx - set a task context and profile on the first task. 1696b5e95b48SJohn Johansen * 1697b5e95b48SJohn Johansen * TODO: allow setting an alternate profile than unconfined 1698b5e95b48SJohn Johansen */ 169955a26ebfSJohn Johansen static int __init set_init_ctx(void) 1700b5e95b48SJohn Johansen { 1701bf1d2ee7SBharath Vedartham struct cred *cred = (__force struct cred *)current->real_cred; 1702b5e95b48SJohn Johansen 170369b5a44aSCasey Schaufler set_cred_label(cred, aa_get_label(ns_unconfined(root_ns))); 1704b5e95b48SJohn Johansen 1705b5e95b48SJohn Johansen return 0; 1706b5e95b48SJohn Johansen } 1707b5e95b48SJohn Johansen 1708d4669f0bSJohn Johansen static void destroy_buffers(void) 1709d4669f0bSJohn Johansen { 1710df323337SSebastian Andrzej Siewior union aa_buffer *aa_buf; 1711d4669f0bSJohn Johansen 1712df323337SSebastian Andrzej Siewior spin_lock(&aa_buffers_lock); 1713df323337SSebastian Andrzej Siewior while (!list_empty(&aa_global_buffers)) { 1714df323337SSebastian Andrzej Siewior aa_buf = list_first_entry(&aa_global_buffers, union aa_buffer, 1715df323337SSebastian Andrzej Siewior list); 1716df323337SSebastian Andrzej Siewior list_del(&aa_buf->list); 1717df323337SSebastian Andrzej Siewior spin_unlock(&aa_buffers_lock); 1718df323337SSebastian Andrzej Siewior kfree(aa_buf); 1719df323337SSebastian Andrzej Siewior spin_lock(&aa_buffers_lock); 1720d4669f0bSJohn Johansen } 1721df323337SSebastian Andrzej Siewior spin_unlock(&aa_buffers_lock); 1722d4669f0bSJohn Johansen } 1723d4669f0bSJohn Johansen 1724d4669f0bSJohn Johansen static int __init alloc_buffers(void) 1725d4669f0bSJohn Johansen { 1726df323337SSebastian Andrzej Siewior union aa_buffer *aa_buf; 1727df323337SSebastian Andrzej Siewior int i, num; 1728d4669f0bSJohn Johansen 1729df323337SSebastian Andrzej Siewior /* 1730df323337SSebastian Andrzej Siewior * A function may require two buffers at once. Usually the buffers are 1731df323337SSebastian Andrzej Siewior * used for a short period of time and are shared. On UP kernel buffers 1732df323337SSebastian Andrzej Siewior * two should be enough, with more CPUs it is possible that more 1733df323337SSebastian Andrzej Siewior * buffers will be used simultaneously. The preallocated pool may grow. 1734df323337SSebastian Andrzej Siewior * This preallocation has also the side-effect that AppArmor will be 1735df323337SSebastian Andrzej Siewior * disabled early at boot if aa_g_path_max is extremly high. 1736df323337SSebastian Andrzej Siewior */ 1737df323337SSebastian Andrzej Siewior if (num_online_cpus() > 1) 1738341c1fdaSJohn Johansen num = 4 + RESERVE_COUNT; 1739d4669f0bSJohn Johansen else 1740341c1fdaSJohn Johansen num = 2 + RESERVE_COUNT; 1741df323337SSebastian Andrzej Siewior 1742df323337SSebastian Andrzej Siewior for (i = 0; i < num; i++) { 1743df323337SSebastian Andrzej Siewior 1744df323337SSebastian Andrzej Siewior aa_buf = kmalloc(aa_g_path_max, GFP_KERNEL | 1745df323337SSebastian Andrzej Siewior __GFP_RETRY_MAYFAIL | __GFP_NOWARN); 1746df323337SSebastian Andrzej Siewior if (!aa_buf) { 1747d4669f0bSJohn Johansen destroy_buffers(); 1748d4669f0bSJohn Johansen return -ENOMEM; 1749d4669f0bSJohn Johansen } 1750df323337SSebastian Andrzej Siewior aa_put_buffer(&aa_buf->buffer[0]); 1751d4669f0bSJohn Johansen } 1752d4669f0bSJohn Johansen return 0; 1753d4669f0bSJohn Johansen } 1754d4669f0bSJohn Johansen 1755e3ea1ca5STyler Hicks #ifdef CONFIG_SYSCTL 1756e3ea1ca5STyler Hicks static int apparmor_dointvec(struct ctl_table *table, int write, 175732927393SChristoph Hellwig void *buffer, size_t *lenp, loff_t *ppos) 1758e3ea1ca5STyler Hicks { 175992de220aSJohn Johansen if (!aa_current_policy_admin_capable(NULL)) 1760e3ea1ca5STyler Hicks return -EPERM; 1761e3ea1ca5STyler Hicks if (!apparmor_enabled) 1762e3ea1ca5STyler Hicks return -EINVAL; 1763e3ea1ca5STyler Hicks 1764e3ea1ca5STyler Hicks return proc_dointvec(table, write, buffer, lenp, ppos); 1765e3ea1ca5STyler Hicks } 1766e3ea1ca5STyler Hicks 1767e3ea1ca5STyler Hicks static struct ctl_path apparmor_sysctl_path[] = { 1768e3ea1ca5STyler Hicks { .procname = "kernel", }, 1769e3ea1ca5STyler Hicks { } 1770e3ea1ca5STyler Hicks }; 1771e3ea1ca5STyler Hicks 1772e3ea1ca5STyler Hicks static struct ctl_table apparmor_sysctl_table[] = { 1773e3ea1ca5STyler Hicks { 1774e3ea1ca5STyler Hicks .procname = "unprivileged_userns_apparmor_policy", 1775e3ea1ca5STyler Hicks .data = &unprivileged_userns_apparmor_policy, 1776e3ea1ca5STyler Hicks .maxlen = sizeof(int), 1777e3ea1ca5STyler Hicks .mode = 0600, 1778e3ea1ca5STyler Hicks .proc_handler = apparmor_dointvec, 1779e3ea1ca5STyler Hicks }, 1780524d8e14SJohn Johansen { 1781524d8e14SJohn Johansen .procname = "apparmor_display_secid_mode", 1782524d8e14SJohn Johansen .data = &apparmor_display_secid_mode, 1783524d8e14SJohn Johansen .maxlen = sizeof(int), 1784524d8e14SJohn Johansen .mode = 0600, 1785524d8e14SJohn Johansen .proc_handler = apparmor_dointvec, 1786524d8e14SJohn Johansen }, 1787524d8e14SJohn Johansen 1788e3ea1ca5STyler Hicks { } 1789e3ea1ca5STyler Hicks }; 1790e3ea1ca5STyler Hicks 1791e3ea1ca5STyler Hicks static int __init apparmor_init_sysctl(void) 1792e3ea1ca5STyler Hicks { 1793e3ea1ca5STyler Hicks return register_sysctl_paths(apparmor_sysctl_path, 1794e3ea1ca5STyler Hicks apparmor_sysctl_table) ? 0 : -ENOMEM; 1795e3ea1ca5STyler Hicks } 1796e3ea1ca5STyler Hicks #else 1797e3ea1ca5STyler Hicks static inline int apparmor_init_sysctl(void) 1798e3ea1ca5STyler Hicks { 1799e3ea1ca5STyler Hicks return 0; 1800e3ea1ca5STyler Hicks } 1801e3ea1ca5STyler Hicks #endif /* CONFIG_SYSCTL */ 1802e3ea1ca5STyler Hicks 1803e1af4779SArnd Bergmann #if defined(CONFIG_NETFILTER) && defined(CONFIG_NETWORK_SECMARK) 1804ab9f2115SMatthew Garrett static unsigned int apparmor_ip_postroute(void *priv, 1805ab9f2115SMatthew Garrett struct sk_buff *skb, 1806ab9f2115SMatthew Garrett const struct nf_hook_state *state) 1807ab9f2115SMatthew Garrett { 1808ab9f2115SMatthew Garrett struct aa_sk_ctx *ctx; 1809ab9f2115SMatthew Garrett struct sock *sk; 1810ab9f2115SMatthew Garrett 1811ab9f2115SMatthew Garrett if (!skb->secmark) 1812ab9f2115SMatthew Garrett return NF_ACCEPT; 1813ab9f2115SMatthew Garrett 1814ab9f2115SMatthew Garrett sk = skb_to_full_sk(skb); 1815ab9f2115SMatthew Garrett if (sk == NULL) 1816ab9f2115SMatthew Garrett return NF_ACCEPT; 1817ab9f2115SMatthew Garrett 1818ab9f2115SMatthew Garrett ctx = SK_CTX(sk); 1819ab9f2115SMatthew Garrett if (!apparmor_secmark_check(ctx->label, OP_SENDMSG, AA_MAY_SEND, 1820ab9f2115SMatthew Garrett skb->secmark, sk)) 1821ab9f2115SMatthew Garrett return NF_ACCEPT; 1822ab9f2115SMatthew Garrett 1823ab9f2115SMatthew Garrett return NF_DROP_ERR(-ECONNREFUSED); 1824ab9f2115SMatthew Garrett 1825ab9f2115SMatthew Garrett } 1826ab9f2115SMatthew Garrett 1827ab9f2115SMatthew Garrett static const struct nf_hook_ops apparmor_nf_ops[] = { 1828ab9f2115SMatthew Garrett { 18297b721124SFlorian Westphal .hook = apparmor_ip_postroute, 1830ab9f2115SMatthew Garrett .pf = NFPROTO_IPV4, 1831ab9f2115SMatthew Garrett .hooknum = NF_INET_POST_ROUTING, 1832ab9f2115SMatthew Garrett .priority = NF_IP_PRI_SELINUX_FIRST, 1833ab9f2115SMatthew Garrett }, 1834ab9f2115SMatthew Garrett #if IS_ENABLED(CONFIG_IPV6) 1835ab9f2115SMatthew Garrett { 18367b721124SFlorian Westphal .hook = apparmor_ip_postroute, 1837ab9f2115SMatthew Garrett .pf = NFPROTO_IPV6, 1838ab9f2115SMatthew Garrett .hooknum = NF_INET_POST_ROUTING, 1839ab9f2115SMatthew Garrett .priority = NF_IP6_PRI_SELINUX_FIRST, 1840ab9f2115SMatthew Garrett }, 1841ab9f2115SMatthew Garrett #endif 1842ab9f2115SMatthew Garrett }; 1843ab9f2115SMatthew Garrett 1844ab9f2115SMatthew Garrett static int __net_init apparmor_nf_register(struct net *net) 1845ab9f2115SMatthew Garrett { 184684117994SMinghao Chi return nf_register_net_hooks(net, apparmor_nf_ops, 1847ab9f2115SMatthew Garrett ARRAY_SIZE(apparmor_nf_ops)); 1848ab9f2115SMatthew Garrett } 1849ab9f2115SMatthew Garrett 1850ab9f2115SMatthew Garrett static void __net_exit apparmor_nf_unregister(struct net *net) 1851ab9f2115SMatthew Garrett { 1852ab9f2115SMatthew Garrett nf_unregister_net_hooks(net, apparmor_nf_ops, 1853ab9f2115SMatthew Garrett ARRAY_SIZE(apparmor_nf_ops)); 1854ab9f2115SMatthew Garrett } 1855ab9f2115SMatthew Garrett 1856ab9f2115SMatthew Garrett static struct pernet_operations apparmor_net_ops = { 1857ab9f2115SMatthew Garrett .init = apparmor_nf_register, 1858ab9f2115SMatthew Garrett .exit = apparmor_nf_unregister, 1859ab9f2115SMatthew Garrett }; 1860ab9f2115SMatthew Garrett 1861ab9f2115SMatthew Garrett static int __init apparmor_nf_ip_init(void) 1862ab9f2115SMatthew Garrett { 1863ab9f2115SMatthew Garrett int err; 1864ab9f2115SMatthew Garrett 1865ab9f2115SMatthew Garrett if (!apparmor_enabled) 1866ab9f2115SMatthew Garrett return 0; 1867ab9f2115SMatthew Garrett 1868ab9f2115SMatthew Garrett err = register_pernet_subsys(&apparmor_net_ops); 1869ab9f2115SMatthew Garrett if (err) 1870ab9f2115SMatthew Garrett panic("Apparmor: register_pernet_subsys: error %d\n", err); 1871ab9f2115SMatthew Garrett 1872ab9f2115SMatthew Garrett return 0; 1873ab9f2115SMatthew Garrett } 1874ab9f2115SMatthew Garrett __initcall(apparmor_nf_ip_init); 1875e1af4779SArnd Bergmann #endif 1876ab9f2115SMatthew Garrett 1877b5e95b48SJohn Johansen static int __init apparmor_init(void) 1878b5e95b48SJohn Johansen { 1879b5e95b48SJohn Johansen int error; 1880b5e95b48SJohn Johansen 188111c236b8SJohn Johansen error = aa_setup_dfa_engine(); 188211c236b8SJohn Johansen if (error) { 188311c236b8SJohn Johansen AA_ERROR("Unable to setup dfa engine\n"); 188411c236b8SJohn Johansen goto alloc_out; 188511c236b8SJohn Johansen } 188611c236b8SJohn Johansen 1887b5e95b48SJohn Johansen error = aa_alloc_root_ns(); 1888b5e95b48SJohn Johansen if (error) { 1889b5e95b48SJohn Johansen AA_ERROR("Unable to allocate default profile namespace\n"); 1890b5e95b48SJohn Johansen goto alloc_out; 1891b5e95b48SJohn Johansen } 1892b5e95b48SJohn Johansen 1893e3ea1ca5STyler Hicks error = apparmor_init_sysctl(); 1894e3ea1ca5STyler Hicks if (error) { 1895e3ea1ca5STyler Hicks AA_ERROR("Unable to register sysctls\n"); 1896e3ea1ca5STyler Hicks goto alloc_out; 1897e3ea1ca5STyler Hicks 1898e3ea1ca5STyler Hicks } 1899e3ea1ca5STyler Hicks 1900d4669f0bSJohn Johansen error = alloc_buffers(); 1901d4669f0bSJohn Johansen if (error) { 1902d4669f0bSJohn Johansen AA_ERROR("Unable to allocate work buffers\n"); 1903df323337SSebastian Andrzej Siewior goto alloc_out; 1904d4669f0bSJohn Johansen } 1905d4669f0bSJohn Johansen 190655a26ebfSJohn Johansen error = set_init_ctx(); 1907b5e95b48SJohn Johansen if (error) { 1908b5e95b48SJohn Johansen AA_ERROR("Failed to set context on init task\n"); 1909b1d9e6b0SCasey Schaufler aa_free_root_ns(); 1910d4669f0bSJohn Johansen goto buffers_out; 1911b5e95b48SJohn Johansen } 1912d69dece5SCasey Schaufler security_add_hooks(apparmor_hooks, ARRAY_SIZE(apparmor_hooks), 1913d69dece5SCasey Schaufler "apparmor"); 1914b5e95b48SJohn Johansen 1915b5e95b48SJohn Johansen /* Report that AppArmor successfully initialized */ 1916b5e95b48SJohn Johansen apparmor_initialized = 1; 1917b5e95b48SJohn Johansen if (aa_g_profile_mode == APPARMOR_COMPLAIN) 1918b5e95b48SJohn Johansen aa_info_message("AppArmor initialized: complain mode enabled"); 1919b5e95b48SJohn Johansen else if (aa_g_profile_mode == APPARMOR_KILL) 1920b5e95b48SJohn Johansen aa_info_message("AppArmor initialized: kill mode enabled"); 1921b5e95b48SJohn Johansen else 1922b5e95b48SJohn Johansen aa_info_message("AppArmor initialized"); 1923b5e95b48SJohn Johansen 1924b5e95b48SJohn Johansen return error; 1925b5e95b48SJohn Johansen 1926d4669f0bSJohn Johansen buffers_out: 1927d4669f0bSJohn Johansen destroy_buffers(); 1928b5e95b48SJohn Johansen alloc_out: 1929b5e95b48SJohn Johansen aa_destroy_aafs(); 193011c236b8SJohn Johansen aa_teardown_dfa_engine(); 1931b5e95b48SJohn Johansen 1932954317feSThomas Meyer apparmor_enabled = false; 1933b5e95b48SJohn Johansen return error; 1934b5e95b48SJohn Johansen } 1935b5e95b48SJohn Johansen 19363d6e5f6dSKees Cook DEFINE_LSM(apparmor) = { 193707aed2f2SKees Cook .name = "apparmor", 193814bd99c8SKees Cook .flags = LSM_FLAG_LEGACY_MAJOR | LSM_FLAG_EXCLUSIVE, 1939c5459b82SKees Cook .enabled = &apparmor_enabled, 1940bbd3662aSCasey Schaufler .blobs = &apparmor_blob_sizes, 19413d6e5f6dSKees Cook .init = apparmor_init, 19423d6e5f6dSKees Cook }; 1943