1b5e95b48SJohn Johansen /* 2b5e95b48SJohn Johansen * AppArmor security module 3b5e95b48SJohn Johansen * 4b5e95b48SJohn Johansen * This file contains AppArmor LSM hooks. 5b5e95b48SJohn Johansen * 6b5e95b48SJohn Johansen * Copyright (C) 1998-2008 Novell/SUSE 7b5e95b48SJohn Johansen * Copyright 2009-2010 Canonical Ltd. 8b5e95b48SJohn Johansen * 9b5e95b48SJohn Johansen * This program is free software; you can redistribute it and/or 10b5e95b48SJohn Johansen * modify it under the terms of the GNU General Public License as 11b5e95b48SJohn Johansen * published by the Free Software Foundation, version 2 of the 12b5e95b48SJohn Johansen * License. 13b5e95b48SJohn Johansen */ 14b5e95b48SJohn Johansen 153c4ed7bdSCasey Schaufler #include <linux/lsm_hooks.h> 16b5e95b48SJohn Johansen #include <linux/moduleparam.h> 17b5e95b48SJohn Johansen #include <linux/mm.h> 18b5e95b48SJohn Johansen #include <linux/mman.h> 19b5e95b48SJohn Johansen #include <linux/mount.h> 20b5e95b48SJohn Johansen #include <linux/namei.h> 21b5e95b48SJohn Johansen #include <linux/ptrace.h> 22b5e95b48SJohn Johansen #include <linux/ctype.h> 23b5e95b48SJohn Johansen #include <linux/sysctl.h> 24b5e95b48SJohn Johansen #include <linux/audit.h> 253486740aSSerge E. Hallyn #include <linux/user_namespace.h> 26b5e95b48SJohn Johansen #include <net/sock.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 47d4669f0bSJohn Johansen DEFINE_PER_CPU(struct aa_buffers, aa_buffers); 48d4669f0bSJohn Johansen 49d4669f0bSJohn Johansen 50b5e95b48SJohn Johansen /* 51b5e95b48SJohn Johansen * LSM hook functions 52b5e95b48SJohn Johansen */ 53b5e95b48SJohn Johansen 54b5e95b48SJohn Johansen /* 55d9087c49SJohn Johansen * put the associated labels 56b5e95b48SJohn Johansen */ 57b5e95b48SJohn Johansen static void apparmor_cred_free(struct cred *cred) 58b5e95b48SJohn Johansen { 59d9087c49SJohn Johansen aa_put_label(cred_label(cred)); 60d9087c49SJohn Johansen cred_label(cred) = NULL; 61b5e95b48SJohn Johansen } 62b5e95b48SJohn Johansen 63b5e95b48SJohn Johansen /* 64b5e95b48SJohn Johansen * allocate the apparmor part of blank credentials 65b5e95b48SJohn Johansen */ 66b5e95b48SJohn Johansen static int apparmor_cred_alloc_blank(struct cred *cred, gfp_t gfp) 67b5e95b48SJohn Johansen { 68d9087c49SJohn Johansen cred_label(cred) = NULL; 69b5e95b48SJohn Johansen return 0; 70b5e95b48SJohn Johansen } 71b5e95b48SJohn Johansen 72b5e95b48SJohn Johansen /* 73d9087c49SJohn Johansen * prepare new cred label for modification by prepare_cred block 74b5e95b48SJohn Johansen */ 75b5e95b48SJohn Johansen static int apparmor_cred_prepare(struct cred *new, const struct cred *old, 76b5e95b48SJohn Johansen gfp_t gfp) 77b5e95b48SJohn Johansen { 78d9087c49SJohn Johansen cred_label(new) = aa_get_newest_label(cred_label(old)); 79b5e95b48SJohn Johansen return 0; 80b5e95b48SJohn Johansen } 81b5e95b48SJohn Johansen 82b5e95b48SJohn Johansen /* 83b5e95b48SJohn Johansen * transfer the apparmor data to a blank set of creds 84b5e95b48SJohn Johansen */ 85b5e95b48SJohn Johansen static void apparmor_cred_transfer(struct cred *new, const struct cred *old) 86b5e95b48SJohn Johansen { 87d9087c49SJohn Johansen cred_label(new) = aa_get_newest_label(cred_label(old)); 88b5e95b48SJohn Johansen } 89b5e95b48SJohn Johansen 903b529a76SJohn Johansen static void apparmor_task_free(struct task_struct *task) 913b529a76SJohn Johansen { 923b529a76SJohn Johansen 933b529a76SJohn Johansen aa_free_task_ctx(task_ctx(task)); 943b529a76SJohn Johansen task_ctx(task) = NULL; 953b529a76SJohn Johansen } 963b529a76SJohn Johansen 973b529a76SJohn Johansen static int apparmor_task_alloc(struct task_struct *task, 983b529a76SJohn Johansen unsigned long clone_flags) 993b529a76SJohn Johansen { 1003b529a76SJohn Johansen struct aa_task_ctx *new = aa_alloc_task_ctx(GFP_KERNEL); 1013b529a76SJohn Johansen 1023b529a76SJohn Johansen if (!new) 1033b529a76SJohn Johansen return -ENOMEM; 1043b529a76SJohn Johansen 105de62de59SJohn Johansen aa_dup_task_ctx(new, task_ctx(current)); 1063b529a76SJohn Johansen task_ctx(task) = new; 1073b529a76SJohn Johansen 1083b529a76SJohn Johansen return 0; 109b5e95b48SJohn Johansen } 110b5e95b48SJohn Johansen 111b5e95b48SJohn Johansen static int apparmor_ptrace_access_check(struct task_struct *child, 112b5e95b48SJohn Johansen unsigned int mode) 113b5e95b48SJohn Johansen { 114b2d09ae4SJohn Johansen struct aa_label *tracer, *tracee; 115b2d09ae4SJohn Johansen int error; 116b2d09ae4SJohn Johansen 117b2d09ae4SJohn Johansen tracer = begin_current_label_crit_section(); 118b2d09ae4SJohn Johansen tracee = aa_get_task_label(child); 119b2d09ae4SJohn Johansen error = aa_may_ptrace(tracer, tracee, 120b2d09ae4SJohn Johansen mode == PTRACE_MODE_READ ? AA_PTRACE_READ : AA_PTRACE_TRACE); 121b2d09ae4SJohn Johansen aa_put_label(tracee); 122b2d09ae4SJohn Johansen end_current_label_crit_section(tracer); 123b2d09ae4SJohn Johansen 124b2d09ae4SJohn Johansen return error; 125b5e95b48SJohn Johansen } 126b5e95b48SJohn Johansen 127b5e95b48SJohn Johansen static int apparmor_ptrace_traceme(struct task_struct *parent) 128b5e95b48SJohn Johansen { 129b2d09ae4SJohn Johansen struct aa_label *tracer, *tracee; 130b2d09ae4SJohn Johansen int error; 131b2d09ae4SJohn Johansen 132b2d09ae4SJohn Johansen tracee = begin_current_label_crit_section(); 133b2d09ae4SJohn Johansen tracer = aa_get_task_label(parent); 134b2d09ae4SJohn Johansen error = aa_may_ptrace(tracer, tracee, AA_PTRACE_TRACE); 135b2d09ae4SJohn Johansen aa_put_label(tracer); 136b2d09ae4SJohn Johansen end_current_label_crit_section(tracee); 137b2d09ae4SJohn Johansen 138b2d09ae4SJohn Johansen return error; 139b5e95b48SJohn Johansen } 140b5e95b48SJohn Johansen 141b5e95b48SJohn Johansen /* Derived from security/commoncap.c:cap_capget */ 142b5e95b48SJohn Johansen static int apparmor_capget(struct task_struct *target, kernel_cap_t *effective, 143b5e95b48SJohn Johansen kernel_cap_t *inheritable, kernel_cap_t *permitted) 144b5e95b48SJohn Johansen { 145637f688dSJohn Johansen struct aa_label *label; 146b5e95b48SJohn Johansen const struct cred *cred; 147b5e95b48SJohn Johansen 148b5e95b48SJohn Johansen rcu_read_lock(); 149b5e95b48SJohn Johansen cred = __task_cred(target); 150637f688dSJohn Johansen label = aa_get_newest_cred_label(cred); 151c70c86c4SJohn Johansen 152b1d9e6b0SCasey Schaufler /* 153b1d9e6b0SCasey Schaufler * cap_capget is stacked ahead of this and will 154b1d9e6b0SCasey Schaufler * initialize effective and permitted. 155b1d9e6b0SCasey Schaufler */ 156c70c86c4SJohn Johansen if (!unconfined(label)) { 157c70c86c4SJohn Johansen struct aa_profile *profile; 158c70c86c4SJohn Johansen struct label_it i; 159c70c86c4SJohn Johansen 160c70c86c4SJohn Johansen label_for_each_confined(i, label, profile) { 161c70c86c4SJohn Johansen if (COMPLAIN_MODE(profile)) 162c70c86c4SJohn Johansen continue; 163c70c86c4SJohn Johansen *effective = cap_intersect(*effective, 164c70c86c4SJohn Johansen profile->caps.allow); 165c70c86c4SJohn Johansen *permitted = cap_intersect(*permitted, 166c70c86c4SJohn Johansen profile->caps.allow); 167c70c86c4SJohn Johansen } 168b5e95b48SJohn Johansen } 169b5e95b48SJohn Johansen rcu_read_unlock(); 170637f688dSJohn Johansen aa_put_label(label); 171b5e95b48SJohn Johansen 172b5e95b48SJohn Johansen return 0; 173b5e95b48SJohn Johansen } 174b5e95b48SJohn Johansen 1756a9de491SEric Paris static int apparmor_capable(const struct cred *cred, struct user_namespace *ns, 1766a9de491SEric Paris int cap, int audit) 177b5e95b48SJohn Johansen { 178637f688dSJohn Johansen struct aa_label *label; 179b1d9e6b0SCasey Schaufler int error = 0; 180b1d9e6b0SCasey Schaufler 181637f688dSJohn Johansen label = aa_get_newest_cred_label(cred); 182637f688dSJohn Johansen if (!unconfined(label)) 183c70c86c4SJohn Johansen error = aa_capable(label, cap, audit); 184637f688dSJohn Johansen aa_put_label(label); 185cf797c0eSJohn Johansen 186b5e95b48SJohn Johansen return error; 187b5e95b48SJohn Johansen } 188b5e95b48SJohn Johansen 189b5e95b48SJohn Johansen /** 190b5e95b48SJohn Johansen * common_perm - basic common permission check wrapper fn for paths 191b5e95b48SJohn Johansen * @op: operation being checked 192b5e95b48SJohn Johansen * @path: path to check permission of (NOT NULL) 193b5e95b48SJohn Johansen * @mask: requested permissions mask 194b5e95b48SJohn Johansen * @cond: conditional info for the permission request (NOT NULL) 195b5e95b48SJohn Johansen * 196b5e95b48SJohn Johansen * Returns: %0 else error code if error or permission denied 197b5e95b48SJohn Johansen */ 19847f6e5ccSJohn Johansen static int common_perm(const char *op, const struct path *path, u32 mask, 199b5e95b48SJohn Johansen struct path_cond *cond) 200b5e95b48SJohn Johansen { 201637f688dSJohn Johansen struct aa_label *label; 202b5e95b48SJohn Johansen int error = 0; 203b5e95b48SJohn Johansen 204637f688dSJohn Johansen label = __begin_current_label_crit_section(); 205637f688dSJohn Johansen if (!unconfined(label)) 206aebd873eSJohn Johansen error = aa_path_perm(op, label, path, 0, mask, cond); 207637f688dSJohn Johansen __end_current_label_crit_section(label); 208b5e95b48SJohn Johansen 209b5e95b48SJohn Johansen return error; 210b5e95b48SJohn Johansen } 211b5e95b48SJohn Johansen 212b5e95b48SJohn Johansen /** 21331f75bfeSJohn Johansen * common_perm_cond - common permission wrapper around inode cond 21431f75bfeSJohn Johansen * @op: operation being checked 21531f75bfeSJohn Johansen * @path: location to check (NOT NULL) 21631f75bfeSJohn Johansen * @mask: requested permissions mask 21731f75bfeSJohn Johansen * 21831f75bfeSJohn Johansen * Returns: %0 else error code if error or permission denied 21931f75bfeSJohn Johansen */ 22031f75bfeSJohn Johansen static int common_perm_cond(const char *op, const struct path *path, u32 mask) 22131f75bfeSJohn Johansen { 22231f75bfeSJohn Johansen struct path_cond cond = { d_backing_inode(path->dentry)->i_uid, 22331f75bfeSJohn Johansen d_backing_inode(path->dentry)->i_mode 22431f75bfeSJohn Johansen }; 22531f75bfeSJohn Johansen 22631f75bfeSJohn Johansen if (!path_mediated_fs(path->dentry)) 22731f75bfeSJohn Johansen return 0; 22831f75bfeSJohn Johansen 22931f75bfeSJohn Johansen return common_perm(op, path, mask, &cond); 23031f75bfeSJohn Johansen } 23131f75bfeSJohn Johansen 23231f75bfeSJohn Johansen /** 233b5e95b48SJohn Johansen * common_perm_dir_dentry - common permission wrapper when path is dir, dentry 234b5e95b48SJohn Johansen * @op: operation being checked 235b5e95b48SJohn Johansen * @dir: directory of the dentry (NOT NULL) 236b5e95b48SJohn Johansen * @dentry: dentry to check (NOT NULL) 237b5e95b48SJohn Johansen * @mask: requested permissions mask 238b5e95b48SJohn Johansen * @cond: conditional info for the permission request (NOT NULL) 239b5e95b48SJohn Johansen * 240b5e95b48SJohn Johansen * Returns: %0 else error code if error or permission denied 241b5e95b48SJohn Johansen */ 24247f6e5ccSJohn Johansen static int common_perm_dir_dentry(const char *op, const struct path *dir, 243b5e95b48SJohn Johansen struct dentry *dentry, u32 mask, 244b5e95b48SJohn Johansen struct path_cond *cond) 245b5e95b48SJohn Johansen { 2468486adf0SKees Cook struct path path = { .mnt = dir->mnt, .dentry = dentry }; 247b5e95b48SJohn Johansen 248b5e95b48SJohn Johansen return common_perm(op, &path, mask, cond); 249b5e95b48SJohn Johansen } 250b5e95b48SJohn Johansen 251b5e95b48SJohn Johansen /** 252b5e95b48SJohn Johansen * common_perm_rm - common permission wrapper for operations doing rm 253b5e95b48SJohn Johansen * @op: operation being checked 254b5e95b48SJohn Johansen * @dir: directory that the dentry is in (NOT NULL) 255b5e95b48SJohn Johansen * @dentry: dentry being rm'd (NOT NULL) 256b5e95b48SJohn Johansen * @mask: requested permission mask 257b5e95b48SJohn Johansen * 258b5e95b48SJohn Johansen * Returns: %0 else error code if error or permission denied 259b5e95b48SJohn Johansen */ 26047f6e5ccSJohn Johansen static int common_perm_rm(const char *op, const struct path *dir, 261b5e95b48SJohn Johansen struct dentry *dentry, u32 mask) 262b5e95b48SJohn Johansen { 263c6f493d6SDavid Howells struct inode *inode = d_backing_inode(dentry); 264b5e95b48SJohn Johansen struct path_cond cond = { }; 265b5e95b48SJohn Johansen 266efeee83aSJohn Johansen if (!inode || !path_mediated_fs(dentry)) 267b5e95b48SJohn Johansen return 0; 268b5e95b48SJohn Johansen 269b5e95b48SJohn Johansen cond.uid = inode->i_uid; 270b5e95b48SJohn Johansen cond.mode = inode->i_mode; 271b5e95b48SJohn Johansen 272b5e95b48SJohn Johansen return common_perm_dir_dentry(op, dir, dentry, mask, &cond); 273b5e95b48SJohn Johansen } 274b5e95b48SJohn Johansen 275b5e95b48SJohn Johansen /** 276b5e95b48SJohn Johansen * common_perm_create - common permission wrapper for operations doing create 277b5e95b48SJohn Johansen * @op: operation being checked 278b5e95b48SJohn Johansen * @dir: directory that dentry will be created in (NOT NULL) 279b5e95b48SJohn Johansen * @dentry: dentry to create (NOT NULL) 280b5e95b48SJohn Johansen * @mask: request permission mask 281b5e95b48SJohn Johansen * @mode: created file mode 282b5e95b48SJohn Johansen * 283b5e95b48SJohn Johansen * Returns: %0 else error code if error or permission denied 284b5e95b48SJohn Johansen */ 28547f6e5ccSJohn Johansen static int common_perm_create(const char *op, const struct path *dir, 286d6b49f7aSAl Viro struct dentry *dentry, u32 mask, umode_t mode) 287b5e95b48SJohn Johansen { 288b5e95b48SJohn Johansen struct path_cond cond = { current_fsuid(), mode }; 289b5e95b48SJohn Johansen 290efeee83aSJohn Johansen if (!path_mediated_fs(dir->dentry)) 291b5e95b48SJohn Johansen return 0; 292b5e95b48SJohn Johansen 293b5e95b48SJohn Johansen return common_perm_dir_dentry(op, dir, dentry, mask, &cond); 294b5e95b48SJohn Johansen } 295b5e95b48SJohn Johansen 296989f74e0SAl Viro static int apparmor_path_unlink(const struct path *dir, struct dentry *dentry) 297b5e95b48SJohn Johansen { 298b5e95b48SJohn Johansen return common_perm_rm(OP_UNLINK, dir, dentry, AA_MAY_DELETE); 299b5e95b48SJohn Johansen } 300b5e95b48SJohn Johansen 301d3607752SAl Viro static int apparmor_path_mkdir(const struct path *dir, struct dentry *dentry, 3024572befeSAl Viro umode_t mode) 303b5e95b48SJohn Johansen { 304b5e95b48SJohn Johansen return common_perm_create(OP_MKDIR, dir, dentry, AA_MAY_CREATE, 305b5e95b48SJohn Johansen S_IFDIR); 306b5e95b48SJohn Johansen } 307b5e95b48SJohn Johansen 308989f74e0SAl Viro static int apparmor_path_rmdir(const struct path *dir, struct dentry *dentry) 309b5e95b48SJohn Johansen { 310b5e95b48SJohn Johansen return common_perm_rm(OP_RMDIR, dir, dentry, AA_MAY_DELETE); 311b5e95b48SJohn Johansen } 312b5e95b48SJohn Johansen 313d3607752SAl Viro static int apparmor_path_mknod(const struct path *dir, struct dentry *dentry, 31404fc66e7SAl Viro umode_t mode, unsigned int dev) 315b5e95b48SJohn Johansen { 316b5e95b48SJohn Johansen return common_perm_create(OP_MKNOD, dir, dentry, AA_MAY_CREATE, mode); 317b5e95b48SJohn Johansen } 318b5e95b48SJohn Johansen 31981f4c506SAl Viro static int apparmor_path_truncate(const struct path *path) 320b5e95b48SJohn Johansen { 321e53cfe6cSJohn Johansen return common_perm_cond(OP_TRUNC, path, MAY_WRITE | AA_MAY_SETATTR); 322b5e95b48SJohn Johansen } 323b5e95b48SJohn Johansen 324d3607752SAl Viro static int apparmor_path_symlink(const struct path *dir, struct dentry *dentry, 325b5e95b48SJohn Johansen const char *old_name) 326b5e95b48SJohn Johansen { 327b5e95b48SJohn Johansen return common_perm_create(OP_SYMLINK, dir, dentry, AA_MAY_CREATE, 328b5e95b48SJohn Johansen S_IFLNK); 329b5e95b48SJohn Johansen } 330b5e95b48SJohn Johansen 3313ccee46aSAl Viro static int apparmor_path_link(struct dentry *old_dentry, const struct path *new_dir, 332b5e95b48SJohn Johansen struct dentry *new_dentry) 333b5e95b48SJohn Johansen { 334637f688dSJohn Johansen struct aa_label *label; 335b5e95b48SJohn Johansen int error = 0; 336b5e95b48SJohn Johansen 337efeee83aSJohn Johansen if (!path_mediated_fs(old_dentry)) 338b5e95b48SJohn Johansen return 0; 339b5e95b48SJohn Johansen 340637f688dSJohn Johansen label = begin_current_label_crit_section(); 341637f688dSJohn Johansen if (!unconfined(label)) 3428014370fSJohn Johansen error = aa_path_link(label, old_dentry, new_dir, new_dentry); 343637f688dSJohn Johansen end_current_label_crit_section(label); 344cf797c0eSJohn Johansen 345b5e95b48SJohn Johansen return error; 346b5e95b48SJohn Johansen } 347b5e95b48SJohn Johansen 3483ccee46aSAl Viro static int apparmor_path_rename(const struct path *old_dir, struct dentry *old_dentry, 3493ccee46aSAl Viro const struct path *new_dir, struct dentry *new_dentry) 350b5e95b48SJohn Johansen { 351637f688dSJohn Johansen struct aa_label *label; 352b5e95b48SJohn Johansen int error = 0; 353b5e95b48SJohn Johansen 354efeee83aSJohn Johansen if (!path_mediated_fs(old_dentry)) 355b5e95b48SJohn Johansen return 0; 356b5e95b48SJohn Johansen 357637f688dSJohn Johansen label = begin_current_label_crit_section(); 358637f688dSJohn Johansen if (!unconfined(label)) { 3598486adf0SKees Cook struct path old_path = { .mnt = old_dir->mnt, 3608486adf0SKees Cook .dentry = old_dentry }; 3618486adf0SKees Cook struct path new_path = { .mnt = new_dir->mnt, 3628486adf0SKees Cook .dentry = new_dentry }; 363c6f493d6SDavid Howells struct path_cond cond = { d_backing_inode(old_dentry)->i_uid, 364c6f493d6SDavid Howells d_backing_inode(old_dentry)->i_mode 365b5e95b48SJohn Johansen }; 366b5e95b48SJohn Johansen 367aebd873eSJohn Johansen error = aa_path_perm(OP_RENAME_SRC, label, &old_path, 0, 368e53cfe6cSJohn Johansen MAY_READ | AA_MAY_GETATTR | MAY_WRITE | 369e53cfe6cSJohn Johansen AA_MAY_SETATTR | AA_MAY_DELETE, 370b5e95b48SJohn Johansen &cond); 371b5e95b48SJohn Johansen if (!error) 372aebd873eSJohn Johansen error = aa_path_perm(OP_RENAME_DEST, label, &new_path, 373e53cfe6cSJohn Johansen 0, MAY_WRITE | AA_MAY_SETATTR | 374b5e95b48SJohn Johansen AA_MAY_CREATE, &cond); 375b5e95b48SJohn Johansen 376b5e95b48SJohn Johansen } 377637f688dSJohn Johansen end_current_label_crit_section(label); 378cf797c0eSJohn Johansen 379b5e95b48SJohn Johansen return error; 380b5e95b48SJohn Johansen } 381b5e95b48SJohn Johansen 382be01f9f2SAl Viro static int apparmor_path_chmod(const struct path *path, umode_t mode) 383b5e95b48SJohn Johansen { 38431f75bfeSJohn Johansen return common_perm_cond(OP_CHMOD, path, AA_MAY_CHMOD); 385b5e95b48SJohn Johansen } 386b5e95b48SJohn Johansen 3877fd25dacSAl Viro static int apparmor_path_chown(const struct path *path, kuid_t uid, kgid_t gid) 388b5e95b48SJohn Johansen { 38931f75bfeSJohn Johansen return common_perm_cond(OP_CHOWN, path, AA_MAY_CHOWN); 390b5e95b48SJohn Johansen } 391b5e95b48SJohn Johansen 3923f7036a0SAl Viro static int apparmor_inode_getattr(const struct path *path) 393b5e95b48SJohn Johansen { 394e53cfe6cSJohn Johansen return common_perm_cond(OP_GETATTR, path, AA_MAY_GETATTR); 395b5e95b48SJohn Johansen } 396b5e95b48SJohn Johansen 39783d49856SEric Paris static int apparmor_file_open(struct file *file, const struct cred *cred) 398b5e95b48SJohn Johansen { 399637f688dSJohn Johansen struct aa_file_ctx *fctx = file_ctx(file); 400637f688dSJohn Johansen struct aa_label *label; 401b5e95b48SJohn Johansen int error = 0; 402b5e95b48SJohn Johansen 403efeee83aSJohn Johansen if (!path_mediated_fs(file->f_path.dentry)) 404b5e95b48SJohn Johansen return 0; 405b5e95b48SJohn Johansen 406b5e95b48SJohn Johansen /* If in exec, permission is handled by bprm hooks. 407b5e95b48SJohn Johansen * Cache permissions granted by the previous exec check, with 408b5e95b48SJohn Johansen * implicit read and executable mmap which are required to 409b5e95b48SJohn Johansen * actually execute the image. 410b5e95b48SJohn Johansen */ 411b5e95b48SJohn Johansen if (current->in_execve) { 41255a26ebfSJohn Johansen fctx->allow = MAY_EXEC | MAY_READ | AA_EXEC_MMAP; 413b5e95b48SJohn Johansen return 0; 414b5e95b48SJohn Johansen } 415b5e95b48SJohn Johansen 416637f688dSJohn Johansen label = aa_get_newest_cred_label(cred); 417637f688dSJohn Johansen if (!unconfined(label)) { 418496ad9aaSAl Viro struct inode *inode = file_inode(file); 419b5e95b48SJohn Johansen struct path_cond cond = { inode->i_uid, inode->i_mode }; 420b5e95b48SJohn Johansen 421aebd873eSJohn Johansen error = aa_path_perm(OP_OPEN, label, &file->f_path, 0, 422b5e95b48SJohn Johansen aa_map_file_to_perms(file), &cond); 423b5e95b48SJohn Johansen /* todo cache full allowed permissions set and state */ 42455a26ebfSJohn Johansen fctx->allow = aa_map_file_to_perms(file); 425b5e95b48SJohn Johansen } 426637f688dSJohn Johansen aa_put_label(label); 427b5e95b48SJohn Johansen 428b5e95b48SJohn Johansen return error; 429b5e95b48SJohn Johansen } 430b5e95b48SJohn Johansen 431b5e95b48SJohn Johansen static int apparmor_file_alloc_security(struct file *file) 432b5e95b48SJohn Johansen { 433cf797c0eSJohn Johansen int error = 0; 434cf797c0eSJohn Johansen 435b5e95b48SJohn Johansen /* freed by apparmor_file_free_security */ 436637f688dSJohn Johansen struct aa_label *label = begin_current_label_crit_section(); 437190a9518SJohn Johansen file->f_security = aa_alloc_file_ctx(label, GFP_KERNEL); 4382835a13bSJohn Johansen if (!file_ctx(file)) 4392835a13bSJohn Johansen error = -ENOMEM; 440637f688dSJohn Johansen end_current_label_crit_section(label); 441b5e95b48SJohn Johansen 442cf797c0eSJohn Johansen return error; 443b5e95b48SJohn Johansen } 444b5e95b48SJohn Johansen 445b5e95b48SJohn Johansen static void apparmor_file_free_security(struct file *file) 446b5e95b48SJohn Johansen { 4472835a13bSJohn Johansen aa_free_file_ctx(file_ctx(file)); 448b5e95b48SJohn Johansen } 449b5e95b48SJohn Johansen 45047f6e5ccSJohn Johansen static int common_file_perm(const char *op, struct file *file, u32 mask) 451b5e95b48SJohn Johansen { 452190a9518SJohn Johansen struct aa_label *label; 453b5e95b48SJohn Johansen int error = 0; 454b5e95b48SJohn Johansen 455192ca6b5SJohn Johansen /* don't reaudit files closed during inheritance */ 456192ca6b5SJohn Johansen if (file->f_path.dentry == aa_null.dentry) 457192ca6b5SJohn Johansen return -EACCES; 458192ca6b5SJohn Johansen 459637f688dSJohn Johansen label = __begin_current_label_crit_section(); 460190a9518SJohn Johansen error = aa_file_perm(op, label, file, mask); 461637f688dSJohn Johansen __end_current_label_crit_section(label); 462b5e95b48SJohn Johansen 463b5e95b48SJohn Johansen return error; 464b5e95b48SJohn Johansen } 465b5e95b48SJohn Johansen 466064dc947SJohn Johansen static int apparmor_file_receive(struct file *file) 467064dc947SJohn Johansen { 468064dc947SJohn Johansen return common_file_perm(OP_FRECEIVE, file, aa_map_file_to_perms(file)); 469064dc947SJohn Johansen } 470064dc947SJohn Johansen 471b5e95b48SJohn Johansen static int apparmor_file_permission(struct file *file, int mask) 472b5e95b48SJohn Johansen { 473b5e95b48SJohn Johansen return common_file_perm(OP_FPERM, file, mask); 474b5e95b48SJohn Johansen } 475b5e95b48SJohn Johansen 476b5e95b48SJohn Johansen static int apparmor_file_lock(struct file *file, unsigned int cmd) 477b5e95b48SJohn Johansen { 478b5e95b48SJohn Johansen u32 mask = AA_MAY_LOCK; 479b5e95b48SJohn Johansen 480b5e95b48SJohn Johansen if (cmd == F_WRLCK) 481b5e95b48SJohn Johansen mask |= MAY_WRITE; 482b5e95b48SJohn Johansen 483b5e95b48SJohn Johansen return common_file_perm(OP_FLOCK, file, mask); 484b5e95b48SJohn Johansen } 485b5e95b48SJohn Johansen 48647f6e5ccSJohn Johansen static int common_mmap(const char *op, struct file *file, unsigned long prot, 487b5e95b48SJohn Johansen unsigned long flags) 488b5e95b48SJohn Johansen { 489b5e95b48SJohn Johansen int mask = 0; 490b5e95b48SJohn Johansen 491637f688dSJohn Johansen if (!file || !file_ctx(file)) 492b5e95b48SJohn Johansen return 0; 493b5e95b48SJohn Johansen 494b5e95b48SJohn Johansen if (prot & PROT_READ) 495b5e95b48SJohn Johansen mask |= MAY_READ; 496b5e95b48SJohn Johansen /* 497b5e95b48SJohn Johansen * Private mappings don't require write perms since they don't 498b5e95b48SJohn Johansen * write back to the files 499b5e95b48SJohn Johansen */ 500b5e95b48SJohn Johansen if ((prot & PROT_WRITE) && !(flags & MAP_PRIVATE)) 501b5e95b48SJohn Johansen mask |= MAY_WRITE; 502b5e95b48SJohn Johansen if (prot & PROT_EXEC) 503b5e95b48SJohn Johansen mask |= AA_EXEC_MMAP; 504b5e95b48SJohn Johansen 505b5e95b48SJohn Johansen return common_file_perm(op, file, mask); 506b5e95b48SJohn Johansen } 507b5e95b48SJohn Johansen 508e5467859SAl Viro static int apparmor_mmap_file(struct file *file, unsigned long reqprot, 509e5467859SAl Viro unsigned long prot, unsigned long flags) 510b5e95b48SJohn Johansen { 511b5e95b48SJohn Johansen return common_mmap(OP_FMMAP, file, prot, flags); 512b5e95b48SJohn Johansen } 513b5e95b48SJohn Johansen 514b5e95b48SJohn Johansen static int apparmor_file_mprotect(struct vm_area_struct *vma, 515b5e95b48SJohn Johansen unsigned long reqprot, unsigned long prot) 516b5e95b48SJohn Johansen { 517b5e95b48SJohn Johansen return common_mmap(OP_FMPROT, vma->vm_file, prot, 518b5e95b48SJohn Johansen !(vma->vm_flags & VM_SHARED) ? MAP_PRIVATE : 0); 519b5e95b48SJohn Johansen } 520b5e95b48SJohn Johansen 5212ea3ffb7SJohn Johansen static int apparmor_sb_mount(const char *dev_name, const struct path *path, 5222ea3ffb7SJohn Johansen const char *type, unsigned long flags, void *data) 5232ea3ffb7SJohn Johansen { 5242ea3ffb7SJohn Johansen struct aa_label *label; 5252ea3ffb7SJohn Johansen int error = 0; 5262ea3ffb7SJohn Johansen 5272ea3ffb7SJohn Johansen /* Discard magic */ 5282ea3ffb7SJohn Johansen if ((flags & MS_MGC_MSK) == MS_MGC_VAL) 5292ea3ffb7SJohn Johansen flags &= ~MS_MGC_MSK; 5302ea3ffb7SJohn Johansen 5312ea3ffb7SJohn Johansen flags &= ~AA_MS_IGNORE_MASK; 5322ea3ffb7SJohn Johansen 5332ea3ffb7SJohn Johansen label = __begin_current_label_crit_section(); 5342ea3ffb7SJohn Johansen if (!unconfined(label)) { 5352ea3ffb7SJohn Johansen if (flags & MS_REMOUNT) 5362ea3ffb7SJohn Johansen error = aa_remount(label, path, flags, data); 5372ea3ffb7SJohn Johansen else if (flags & MS_BIND) 5382ea3ffb7SJohn Johansen error = aa_bind_mount(label, path, dev_name, flags); 5392ea3ffb7SJohn Johansen else if (flags & (MS_SHARED | MS_PRIVATE | MS_SLAVE | 5402ea3ffb7SJohn Johansen MS_UNBINDABLE)) 5412ea3ffb7SJohn Johansen error = aa_mount_change_type(label, path, flags); 5422ea3ffb7SJohn Johansen else if (flags & MS_MOVE) 5432ea3ffb7SJohn Johansen error = aa_move_mount(label, path, dev_name); 5442ea3ffb7SJohn Johansen else 5452ea3ffb7SJohn Johansen error = aa_new_mount(label, dev_name, path, type, 5462ea3ffb7SJohn Johansen flags, data); 5472ea3ffb7SJohn Johansen } 5482ea3ffb7SJohn Johansen __end_current_label_crit_section(label); 5492ea3ffb7SJohn Johansen 5502ea3ffb7SJohn Johansen return error; 5512ea3ffb7SJohn Johansen } 5522ea3ffb7SJohn Johansen 5532ea3ffb7SJohn Johansen static int apparmor_sb_umount(struct vfsmount *mnt, int flags) 5542ea3ffb7SJohn Johansen { 5552ea3ffb7SJohn Johansen struct aa_label *label; 5562ea3ffb7SJohn Johansen int error = 0; 5572ea3ffb7SJohn Johansen 5582ea3ffb7SJohn Johansen label = __begin_current_label_crit_section(); 5592ea3ffb7SJohn Johansen if (!unconfined(label)) 5602ea3ffb7SJohn Johansen error = aa_umount(label, mnt, flags); 5612ea3ffb7SJohn Johansen __end_current_label_crit_section(label); 5622ea3ffb7SJohn Johansen 5632ea3ffb7SJohn Johansen return error; 5642ea3ffb7SJohn Johansen } 5652ea3ffb7SJohn Johansen 5662ea3ffb7SJohn Johansen static int apparmor_sb_pivotroot(const struct path *old_path, 5672ea3ffb7SJohn Johansen const struct path *new_path) 5682ea3ffb7SJohn Johansen { 5692ea3ffb7SJohn Johansen struct aa_label *label; 5702ea3ffb7SJohn Johansen int error = 0; 5712ea3ffb7SJohn Johansen 5722ea3ffb7SJohn Johansen label = aa_get_current_label(); 5732ea3ffb7SJohn Johansen if (!unconfined(label)) 5742ea3ffb7SJohn Johansen error = aa_pivotroot(label, old_path, new_path); 5752ea3ffb7SJohn Johansen aa_put_label(label); 5762ea3ffb7SJohn Johansen 5772ea3ffb7SJohn Johansen return error; 5782ea3ffb7SJohn Johansen } 5792ea3ffb7SJohn Johansen 580b5e95b48SJohn Johansen static int apparmor_getprocattr(struct task_struct *task, char *name, 581b5e95b48SJohn Johansen char **value) 582b5e95b48SJohn Johansen { 583b5e95b48SJohn Johansen int error = -ENOENT; 584b5e95b48SJohn Johansen /* released below */ 585b5e95b48SJohn Johansen const struct cred *cred = get_task_cred(task); 586de62de59SJohn Johansen struct aa_task_ctx *ctx = task_ctx(current); 587637f688dSJohn Johansen struct aa_label *label = NULL; 588b5e95b48SJohn Johansen 589b5e95b48SJohn Johansen if (strcmp(name, "current") == 0) 590d9087c49SJohn Johansen label = aa_get_newest_label(cred_label(cred)); 59155a26ebfSJohn Johansen else if (strcmp(name, "prev") == 0 && ctx->previous) 592637f688dSJohn Johansen label = aa_get_newest_label(ctx->previous); 59355a26ebfSJohn Johansen else if (strcmp(name, "exec") == 0 && ctx->onexec) 594637f688dSJohn Johansen label = aa_get_newest_label(ctx->onexec); 595b5e95b48SJohn Johansen else 596b5e95b48SJohn Johansen error = -EINVAL; 597b5e95b48SJohn Johansen 598637f688dSJohn Johansen if (label) 59976a1d263SJohn Johansen error = aa_getprocattr(label, value); 60077b071b3SJohn Johansen 601637f688dSJohn Johansen aa_put_label(label); 602b5e95b48SJohn Johansen put_cred(cred); 603b5e95b48SJohn Johansen 604b5e95b48SJohn Johansen return error; 605b5e95b48SJohn Johansen } 606b5e95b48SJohn Johansen 607b21507e2SStephen Smalley static int apparmor_setprocattr(const char *name, void *value, 608b21507e2SStephen Smalley size_t size) 609b5e95b48SJohn Johansen { 610e89b8081SVegard Nossum char *command, *largs = NULL, *args = value; 611b5e95b48SJohn Johansen size_t arg_size; 612b5e95b48SJohn Johansen int error; 613ef88a7acSJohn Johansen DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_NONE, OP_SETPROCATTR); 614b5e95b48SJohn Johansen 615b5e95b48SJohn Johansen if (size == 0) 616b5e95b48SJohn Johansen return -EINVAL; 617b5e95b48SJohn Johansen 618e89b8081SVegard Nossum /* AppArmor requires that the buffer must be null terminated atm */ 619e89b8081SVegard Nossum if (args[size - 1] != '\0') { 620e89b8081SVegard Nossum /* null terminate */ 621e89b8081SVegard Nossum largs = args = kmalloc(size + 1, GFP_KERNEL); 622e89b8081SVegard Nossum if (!args) 623e89b8081SVegard Nossum return -ENOMEM; 624e89b8081SVegard Nossum memcpy(args, value, size); 625e89b8081SVegard Nossum args[size] = '\0'; 626e89b8081SVegard Nossum } 627e89b8081SVegard Nossum 628e89b8081SVegard Nossum error = -EINVAL; 629b5e95b48SJohn Johansen args = strim(args); 630b5e95b48SJohn Johansen command = strsep(&args, " "); 631b5e95b48SJohn Johansen if (!args) 632e89b8081SVegard Nossum goto out; 633b5e95b48SJohn Johansen args = skip_spaces(args); 634b5e95b48SJohn Johansen if (!*args) 635e89b8081SVegard Nossum goto out; 636b5e95b48SJohn Johansen 637d4d03f74SJohn Johansen arg_size = size - (args - (largs ? largs : (char *) value)); 638b5e95b48SJohn Johansen if (strcmp(name, "current") == 0) { 639b5e95b48SJohn Johansen if (strcmp(command, "changehat") == 0) { 640b5e95b48SJohn Johansen error = aa_setprocattr_changehat(args, arg_size, 641df8073c6SJohn Johansen AA_CHANGE_NOFLAGS); 642b5e95b48SJohn Johansen } else if (strcmp(command, "permhat") == 0) { 643b5e95b48SJohn Johansen error = aa_setprocattr_changehat(args, arg_size, 644df8073c6SJohn Johansen AA_CHANGE_TEST); 645b5e95b48SJohn Johansen } else if (strcmp(command, "changeprofile") == 0) { 646df8073c6SJohn Johansen error = aa_change_profile(args, AA_CHANGE_NOFLAGS); 647b5e95b48SJohn Johansen } else if (strcmp(command, "permprofile") == 0) { 648df8073c6SJohn Johansen error = aa_change_profile(args, AA_CHANGE_TEST); 6496c5fc8f1SJohn Johansen } else if (strcmp(command, "stack") == 0) { 6506c5fc8f1SJohn Johansen error = aa_change_profile(args, AA_CHANGE_STACK); 6513eea57c2SJohn Johansen } else 6523eea57c2SJohn Johansen goto fail; 653b5e95b48SJohn Johansen } else if (strcmp(name, "exec") == 0) { 6543eea57c2SJohn Johansen if (strcmp(command, "exec") == 0) 655df8073c6SJohn Johansen error = aa_change_profile(args, AA_CHANGE_ONEXEC); 6566c5fc8f1SJohn Johansen else if (strcmp(command, "stack") == 0) 6576c5fc8f1SJohn Johansen error = aa_change_profile(args, (AA_CHANGE_ONEXEC | 6586c5fc8f1SJohn Johansen AA_CHANGE_STACK)); 6593eea57c2SJohn Johansen else 6603eea57c2SJohn Johansen goto fail; 6613eea57c2SJohn Johansen } else 662b5e95b48SJohn Johansen /* only support the "current" and "exec" process attributes */ 663e89b8081SVegard Nossum goto fail; 6643eea57c2SJohn Johansen 665b5e95b48SJohn Johansen if (!error) 666b5e95b48SJohn Johansen error = size; 667e89b8081SVegard Nossum out: 668e89b8081SVegard Nossum kfree(largs); 669b5e95b48SJohn Johansen return error; 6703eea57c2SJohn Johansen 6713eea57c2SJohn Johansen fail: 672637f688dSJohn Johansen aad(&sa)->label = begin_current_label_crit_section(); 673ef88a7acSJohn Johansen aad(&sa)->info = name; 674ef88a7acSJohn Johansen aad(&sa)->error = error = -EINVAL; 6753eea57c2SJohn Johansen aa_audit_msg(AUDIT_APPARMOR_DENIED, &sa, NULL); 676637f688dSJohn Johansen end_current_label_crit_section(aad(&sa)->label); 677e89b8081SVegard Nossum goto out; 678b5e95b48SJohn Johansen } 679b5e95b48SJohn Johansen 680fe864821SJohn Johansen /** 681fe864821SJohn Johansen * apparmor_bprm_committing_creds - do task cleanup on committing new creds 682fe864821SJohn Johansen * @bprm: binprm for the exec (NOT NULL) 683fe864821SJohn Johansen */ 684fe864821SJohn Johansen static void apparmor_bprm_committing_creds(struct linux_binprm *bprm) 685fe864821SJohn Johansen { 686637f688dSJohn Johansen struct aa_label *label = aa_current_raw_label(); 687d9087c49SJohn Johansen struct aa_label *new_label = cred_label(bprm->cred); 688fe864821SJohn Johansen 689fe864821SJohn Johansen /* bail out if unconfined or not changing profile */ 690d9087c49SJohn Johansen if ((new_label->proxy == label->proxy) || 691d9087c49SJohn Johansen (unconfined(new_label))) 692fe864821SJohn Johansen return; 693fe864821SJohn Johansen 694192ca6b5SJohn Johansen aa_inherit_files(bprm->cred, current->files); 695192ca6b5SJohn Johansen 696fe864821SJohn Johansen current->pdeath_signal = 0; 697fe864821SJohn Johansen 698637f688dSJohn Johansen /* reset soft limits and set hard limits for the new label */ 699d9087c49SJohn Johansen __aa_transition_rlimits(label, new_label); 700fe864821SJohn Johansen } 701fe864821SJohn Johansen 702fe864821SJohn Johansen /** 703fe864821SJohn Johansen * apparmor_bprm_committed_cred - do cleanup after new creds committed 704fe864821SJohn Johansen * @bprm: binprm for the exec (NOT NULL) 705fe864821SJohn Johansen */ 706fe864821SJohn Johansen static void apparmor_bprm_committed_creds(struct linux_binprm *bprm) 707fe864821SJohn Johansen { 7083b529a76SJohn Johansen /* clear out temporary/transitional state from the context */ 709de62de59SJohn Johansen aa_clear_task_ctx_trans(task_ctx(current)); 7103b529a76SJohn Johansen 711fe864821SJohn Johansen return; 712fe864821SJohn Johansen } 713fe864821SJohn Johansen 714a7ae3645SJohn Johansen static void apparmor_task_getsecid(struct task_struct *p, u32 *secid) 715a7ae3645SJohn Johansen { 716a7ae3645SJohn Johansen struct aa_label *label = aa_get_task_label(p); 717a7ae3645SJohn Johansen *secid = label->secid; 718a7ae3645SJohn Johansen aa_put_label(label); 719a7ae3645SJohn Johansen } 720a7ae3645SJohn Johansen 7217cb4dc9fSJiri Slaby static int apparmor_task_setrlimit(struct task_struct *task, 7227cb4dc9fSJiri Slaby unsigned int resource, struct rlimit *new_rlim) 723b5e95b48SJohn Johansen { 724637f688dSJohn Johansen struct aa_label *label = __begin_current_label_crit_section(); 725b5e95b48SJohn Johansen int error = 0; 726b5e95b48SJohn Johansen 727637f688dSJohn Johansen if (!unconfined(label)) 72886b92cb7SJohn Johansen error = aa_task_setrlimit(label, task, resource, new_rlim); 729637f688dSJohn Johansen __end_current_label_crit_section(label); 730b5e95b48SJohn Johansen 731b5e95b48SJohn Johansen return error; 732b5e95b48SJohn Johansen } 733b5e95b48SJohn Johansen 734cd1dbf76SJohn Johansen static int apparmor_task_kill(struct task_struct *target, struct siginfo *info, 7356b4f3d01SStephen Smalley int sig, const struct cred *cred) 736cd1dbf76SJohn Johansen { 737cd1dbf76SJohn Johansen struct aa_label *cl, *tl; 738cd1dbf76SJohn Johansen int error; 739cd1dbf76SJohn Johansen 7406b4f3d01SStephen Smalley if (cred) { 7416b4f3d01SStephen Smalley /* 742cd1dbf76SJohn Johansen * Dealing with USB IO specific behavior 743cd1dbf76SJohn Johansen */ 7446b4f3d01SStephen Smalley cl = aa_get_newest_cred_label(cred); 7456b4f3d01SStephen Smalley tl = aa_get_task_label(target); 7466b4f3d01SStephen Smalley error = aa_may_signal(cl, tl, sig); 7476b4f3d01SStephen Smalley aa_put_label(cl); 7486b4f3d01SStephen Smalley aa_put_label(tl); 7496b4f3d01SStephen Smalley return error; 7506b4f3d01SStephen Smalley } 7516b4f3d01SStephen Smalley 752cd1dbf76SJohn Johansen cl = __begin_current_label_crit_section(); 753cd1dbf76SJohn Johansen tl = aa_get_task_label(target); 754cd1dbf76SJohn Johansen error = aa_may_signal(cl, tl, sig); 755cd1dbf76SJohn Johansen aa_put_label(tl); 756cd1dbf76SJohn Johansen __end_current_label_crit_section(cl); 757cd1dbf76SJohn Johansen 758cd1dbf76SJohn Johansen return error; 759cd1dbf76SJohn Johansen } 760cd1dbf76SJohn Johansen 76156974a6fSJohn Johansen /** 76256974a6fSJohn Johansen * apparmor_sk_alloc_security - allocate and attach the sk_security field 76356974a6fSJohn Johansen */ 76456974a6fSJohn Johansen static int apparmor_sk_alloc_security(struct sock *sk, int family, gfp_t flags) 76556974a6fSJohn Johansen { 76656974a6fSJohn Johansen struct aa_sk_ctx *ctx; 76756974a6fSJohn Johansen 76856974a6fSJohn Johansen ctx = kzalloc(sizeof(*ctx), flags); 76956974a6fSJohn Johansen if (!ctx) 77056974a6fSJohn Johansen return -ENOMEM; 77156974a6fSJohn Johansen 77256974a6fSJohn Johansen SK_CTX(sk) = ctx; 77356974a6fSJohn Johansen 77456974a6fSJohn Johansen return 0; 77556974a6fSJohn Johansen } 77656974a6fSJohn Johansen 77756974a6fSJohn Johansen /** 77856974a6fSJohn Johansen * apparmor_sk_free_security - free the sk_security field 77956974a6fSJohn Johansen */ 78056974a6fSJohn Johansen static void apparmor_sk_free_security(struct sock *sk) 78156974a6fSJohn Johansen { 78256974a6fSJohn Johansen struct aa_sk_ctx *ctx = SK_CTX(sk); 78356974a6fSJohn Johansen 78456974a6fSJohn Johansen SK_CTX(sk) = NULL; 78556974a6fSJohn Johansen aa_put_label(ctx->label); 78656974a6fSJohn Johansen aa_put_label(ctx->peer); 78756974a6fSJohn Johansen kfree(ctx); 78856974a6fSJohn Johansen } 78956974a6fSJohn Johansen 79056974a6fSJohn Johansen /** 79156974a6fSJohn Johansen * apparmor_clone_security - clone the sk_security field 79256974a6fSJohn Johansen */ 79356974a6fSJohn Johansen static void apparmor_sk_clone_security(const struct sock *sk, 79456974a6fSJohn Johansen struct sock *newsk) 79556974a6fSJohn Johansen { 79656974a6fSJohn Johansen struct aa_sk_ctx *ctx = SK_CTX(sk); 79756974a6fSJohn Johansen struct aa_sk_ctx *new = SK_CTX(newsk); 79856974a6fSJohn Johansen 79956974a6fSJohn Johansen new->label = aa_get_label(ctx->label); 80056974a6fSJohn Johansen new->peer = aa_get_label(ctx->peer); 80156974a6fSJohn Johansen } 80256974a6fSJohn Johansen 80356974a6fSJohn Johansen /** 80456974a6fSJohn Johansen * apparmor_socket_create - check perms before creating a new socket 80556974a6fSJohn Johansen */ 80656974a6fSJohn Johansen static int apparmor_socket_create(int family, int type, int protocol, int kern) 80756974a6fSJohn Johansen { 80856974a6fSJohn Johansen struct aa_label *label; 80956974a6fSJohn Johansen int error = 0; 81056974a6fSJohn Johansen 81156974a6fSJohn Johansen AA_BUG(in_interrupt()); 81256974a6fSJohn Johansen 81356974a6fSJohn Johansen label = begin_current_label_crit_section(); 81456974a6fSJohn Johansen if (!(kern || unconfined(label))) 81556974a6fSJohn Johansen error = af_select(family, 81656974a6fSJohn Johansen create_perm(label, family, type, protocol), 81756974a6fSJohn Johansen aa_af_perm(label, OP_CREATE, AA_MAY_CREATE, 81856974a6fSJohn Johansen family, type, protocol)); 81956974a6fSJohn Johansen end_current_label_crit_section(label); 82056974a6fSJohn Johansen 82156974a6fSJohn Johansen return error; 82256974a6fSJohn Johansen } 82356974a6fSJohn Johansen 82456974a6fSJohn Johansen /** 82556974a6fSJohn Johansen * apparmor_socket_post_create - setup the per-socket security struct 82656974a6fSJohn Johansen * 82756974a6fSJohn Johansen * Note: 82856974a6fSJohn Johansen * - kernel sockets currently labeled unconfined but we may want to 82956974a6fSJohn Johansen * move to a special kernel label 83056974a6fSJohn Johansen * - socket may not have sk here if created with sock_create_lite or 83156974a6fSJohn Johansen * sock_alloc. These should be accept cases which will be handled in 83256974a6fSJohn Johansen * sock_graft. 83356974a6fSJohn Johansen */ 83456974a6fSJohn Johansen static int apparmor_socket_post_create(struct socket *sock, int family, 83556974a6fSJohn Johansen int type, int protocol, int kern) 83656974a6fSJohn Johansen { 83756974a6fSJohn Johansen struct aa_label *label; 83856974a6fSJohn Johansen 83956974a6fSJohn Johansen if (kern) { 84056974a6fSJohn Johansen struct aa_ns *ns = aa_get_current_ns(); 84156974a6fSJohn Johansen 84256974a6fSJohn Johansen label = aa_get_label(ns_unconfined(ns)); 84356974a6fSJohn Johansen aa_put_ns(ns); 84456974a6fSJohn Johansen } else 84556974a6fSJohn Johansen label = aa_get_current_label(); 84656974a6fSJohn Johansen 84756974a6fSJohn Johansen if (sock->sk) { 84856974a6fSJohn Johansen struct aa_sk_ctx *ctx = SK_CTX(sock->sk); 84956974a6fSJohn Johansen 85056974a6fSJohn Johansen aa_put_label(ctx->label); 85156974a6fSJohn Johansen ctx->label = aa_get_label(label); 85256974a6fSJohn Johansen } 85356974a6fSJohn Johansen aa_put_label(label); 85456974a6fSJohn Johansen 85556974a6fSJohn Johansen return 0; 85656974a6fSJohn Johansen } 85756974a6fSJohn Johansen 85856974a6fSJohn Johansen /** 85956974a6fSJohn Johansen * apparmor_socket_bind - check perms before bind addr to socket 86056974a6fSJohn Johansen */ 86156974a6fSJohn Johansen static int apparmor_socket_bind(struct socket *sock, 86256974a6fSJohn Johansen struct sockaddr *address, int addrlen) 86356974a6fSJohn Johansen { 86456974a6fSJohn Johansen AA_BUG(!sock); 86556974a6fSJohn Johansen AA_BUG(!sock->sk); 86656974a6fSJohn Johansen AA_BUG(!address); 86756974a6fSJohn Johansen AA_BUG(in_interrupt()); 86856974a6fSJohn Johansen 86956974a6fSJohn Johansen return af_select(sock->sk->sk_family, 87056974a6fSJohn Johansen bind_perm(sock, address, addrlen), 87156974a6fSJohn Johansen aa_sk_perm(OP_BIND, AA_MAY_BIND, sock->sk)); 87256974a6fSJohn Johansen } 87356974a6fSJohn Johansen 87456974a6fSJohn Johansen /** 87556974a6fSJohn Johansen * apparmor_socket_connect - check perms before connecting @sock to @address 87656974a6fSJohn Johansen */ 87756974a6fSJohn Johansen static int apparmor_socket_connect(struct socket *sock, 87856974a6fSJohn Johansen struct sockaddr *address, int addrlen) 87956974a6fSJohn Johansen { 88056974a6fSJohn Johansen AA_BUG(!sock); 88156974a6fSJohn Johansen AA_BUG(!sock->sk); 88256974a6fSJohn Johansen AA_BUG(!address); 88356974a6fSJohn Johansen AA_BUG(in_interrupt()); 88456974a6fSJohn Johansen 88556974a6fSJohn Johansen return af_select(sock->sk->sk_family, 88656974a6fSJohn Johansen connect_perm(sock, address, addrlen), 88756974a6fSJohn Johansen aa_sk_perm(OP_CONNECT, AA_MAY_CONNECT, sock->sk)); 88856974a6fSJohn Johansen } 88956974a6fSJohn Johansen 89056974a6fSJohn Johansen /** 89156974a6fSJohn Johansen * apparmor_socket_list - check perms before allowing listen 89256974a6fSJohn Johansen */ 89356974a6fSJohn Johansen static int apparmor_socket_listen(struct socket *sock, int backlog) 89456974a6fSJohn Johansen { 89556974a6fSJohn Johansen AA_BUG(!sock); 89656974a6fSJohn Johansen AA_BUG(!sock->sk); 89756974a6fSJohn Johansen AA_BUG(in_interrupt()); 89856974a6fSJohn Johansen 89956974a6fSJohn Johansen return af_select(sock->sk->sk_family, 90056974a6fSJohn Johansen listen_perm(sock, backlog), 90156974a6fSJohn Johansen aa_sk_perm(OP_LISTEN, AA_MAY_LISTEN, sock->sk)); 90256974a6fSJohn Johansen } 90356974a6fSJohn Johansen 90456974a6fSJohn Johansen /** 90556974a6fSJohn Johansen * apparmor_socket_accept - check perms before accepting a new connection. 90656974a6fSJohn Johansen * 90756974a6fSJohn Johansen * Note: while @newsock is created and has some information, the accept 90856974a6fSJohn Johansen * has not been done. 90956974a6fSJohn Johansen */ 91056974a6fSJohn Johansen static int apparmor_socket_accept(struct socket *sock, struct socket *newsock) 91156974a6fSJohn Johansen { 91256974a6fSJohn Johansen AA_BUG(!sock); 91356974a6fSJohn Johansen AA_BUG(!sock->sk); 91456974a6fSJohn Johansen AA_BUG(!newsock); 91556974a6fSJohn Johansen AA_BUG(in_interrupt()); 91656974a6fSJohn Johansen 91756974a6fSJohn Johansen return af_select(sock->sk->sk_family, 91856974a6fSJohn Johansen accept_perm(sock, newsock), 91956974a6fSJohn Johansen aa_sk_perm(OP_ACCEPT, AA_MAY_ACCEPT, sock->sk)); 92056974a6fSJohn Johansen } 92156974a6fSJohn Johansen 92256974a6fSJohn Johansen static int aa_sock_msg_perm(const char *op, u32 request, struct socket *sock, 92356974a6fSJohn Johansen struct msghdr *msg, int size) 92456974a6fSJohn Johansen { 92556974a6fSJohn Johansen AA_BUG(!sock); 92656974a6fSJohn Johansen AA_BUG(!sock->sk); 92756974a6fSJohn Johansen AA_BUG(!msg); 92856974a6fSJohn Johansen AA_BUG(in_interrupt()); 92956974a6fSJohn Johansen 93056974a6fSJohn Johansen return af_select(sock->sk->sk_family, 93156974a6fSJohn Johansen msg_perm(op, request, sock, msg, size), 93256974a6fSJohn Johansen aa_sk_perm(op, request, sock->sk)); 93356974a6fSJohn Johansen } 93456974a6fSJohn Johansen 93556974a6fSJohn Johansen /** 93656974a6fSJohn Johansen * apparmor_socket_sendmsg - check perms before sending msg to another socket 93756974a6fSJohn Johansen */ 93856974a6fSJohn Johansen static int apparmor_socket_sendmsg(struct socket *sock, 93956974a6fSJohn Johansen struct msghdr *msg, int size) 94056974a6fSJohn Johansen { 94156974a6fSJohn Johansen return aa_sock_msg_perm(OP_SENDMSG, AA_MAY_SEND, sock, msg, size); 94256974a6fSJohn Johansen } 94356974a6fSJohn Johansen 94456974a6fSJohn Johansen /** 94556974a6fSJohn Johansen * apparmor_socket_recvmsg - check perms before receiving a message 94656974a6fSJohn Johansen */ 94756974a6fSJohn Johansen static int apparmor_socket_recvmsg(struct socket *sock, 94856974a6fSJohn Johansen struct msghdr *msg, int size, int flags) 94956974a6fSJohn Johansen { 95056974a6fSJohn Johansen return aa_sock_msg_perm(OP_RECVMSG, AA_MAY_RECEIVE, sock, msg, size); 95156974a6fSJohn Johansen } 95256974a6fSJohn Johansen 95356974a6fSJohn Johansen /* revaliation, get/set attr, shutdown */ 95456974a6fSJohn Johansen static int aa_sock_perm(const char *op, u32 request, struct socket *sock) 95556974a6fSJohn Johansen { 95656974a6fSJohn Johansen AA_BUG(!sock); 95756974a6fSJohn Johansen AA_BUG(!sock->sk); 95856974a6fSJohn Johansen AA_BUG(in_interrupt()); 95956974a6fSJohn Johansen 96056974a6fSJohn Johansen return af_select(sock->sk->sk_family, 96156974a6fSJohn Johansen sock_perm(op, request, sock), 96256974a6fSJohn Johansen aa_sk_perm(op, request, sock->sk)); 96356974a6fSJohn Johansen } 96456974a6fSJohn Johansen 96556974a6fSJohn Johansen /** 96656974a6fSJohn Johansen * apparmor_socket_getsockname - check perms before getting the local address 96756974a6fSJohn Johansen */ 96856974a6fSJohn Johansen static int apparmor_socket_getsockname(struct socket *sock) 96956974a6fSJohn Johansen { 97056974a6fSJohn Johansen return aa_sock_perm(OP_GETSOCKNAME, AA_MAY_GETATTR, sock); 97156974a6fSJohn Johansen } 97256974a6fSJohn Johansen 97356974a6fSJohn Johansen /** 97456974a6fSJohn Johansen * apparmor_socket_getpeername - check perms before getting remote address 97556974a6fSJohn Johansen */ 97656974a6fSJohn Johansen static int apparmor_socket_getpeername(struct socket *sock) 97756974a6fSJohn Johansen { 97856974a6fSJohn Johansen return aa_sock_perm(OP_GETPEERNAME, AA_MAY_GETATTR, sock); 97956974a6fSJohn Johansen } 98056974a6fSJohn Johansen 98156974a6fSJohn Johansen /* revaliation, get/set attr, opt */ 98256974a6fSJohn Johansen static int aa_sock_opt_perm(const char *op, u32 request, struct socket *sock, 98356974a6fSJohn Johansen int level, int optname) 98456974a6fSJohn Johansen { 98556974a6fSJohn Johansen AA_BUG(!sock); 98656974a6fSJohn Johansen AA_BUG(!sock->sk); 98756974a6fSJohn Johansen AA_BUG(in_interrupt()); 98856974a6fSJohn Johansen 98956974a6fSJohn Johansen return af_select(sock->sk->sk_family, 99056974a6fSJohn Johansen opt_perm(op, request, sock, level, optname), 99156974a6fSJohn Johansen aa_sk_perm(op, request, sock->sk)); 99256974a6fSJohn Johansen } 99356974a6fSJohn Johansen 99456974a6fSJohn Johansen /** 99556974a6fSJohn Johansen * apparmor_getsockopt - check perms before getting socket options 99656974a6fSJohn Johansen */ 99756974a6fSJohn Johansen static int apparmor_socket_getsockopt(struct socket *sock, int level, 99856974a6fSJohn Johansen int optname) 99956974a6fSJohn Johansen { 100056974a6fSJohn Johansen return aa_sock_opt_perm(OP_GETSOCKOPT, AA_MAY_GETOPT, sock, 100156974a6fSJohn Johansen level, optname); 100256974a6fSJohn Johansen } 100356974a6fSJohn Johansen 100456974a6fSJohn Johansen /** 100556974a6fSJohn Johansen * apparmor_setsockopt - check perms before setting socket options 100656974a6fSJohn Johansen */ 100756974a6fSJohn Johansen static int apparmor_socket_setsockopt(struct socket *sock, int level, 100856974a6fSJohn Johansen int optname) 100956974a6fSJohn Johansen { 101056974a6fSJohn Johansen return aa_sock_opt_perm(OP_SETSOCKOPT, AA_MAY_SETOPT, sock, 101156974a6fSJohn Johansen level, optname); 101256974a6fSJohn Johansen } 101356974a6fSJohn Johansen 101456974a6fSJohn Johansen /** 101556974a6fSJohn Johansen * apparmor_socket_shutdown - check perms before shutting down @sock conn 101656974a6fSJohn Johansen */ 101756974a6fSJohn Johansen static int apparmor_socket_shutdown(struct socket *sock, int how) 101856974a6fSJohn Johansen { 101956974a6fSJohn Johansen return aa_sock_perm(OP_SHUTDOWN, AA_MAY_SHUTDOWN, sock); 102056974a6fSJohn Johansen } 102156974a6fSJohn Johansen 102256974a6fSJohn Johansen /** 102356974a6fSJohn Johansen * apparmor_socket_sock_recv_skb - check perms before associating skb to sk 102456974a6fSJohn Johansen * 102556974a6fSJohn Johansen * Note: can not sleep may be called with locks held 102656974a6fSJohn Johansen * 102756974a6fSJohn Johansen * dont want protocol specific in __skb_recv_datagram() 102856974a6fSJohn Johansen * to deny an incoming connection socket_sock_rcv_skb() 102956974a6fSJohn Johansen */ 103056974a6fSJohn Johansen static int apparmor_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) 103156974a6fSJohn Johansen { 103256974a6fSJohn Johansen return 0; 103356974a6fSJohn Johansen } 103456974a6fSJohn Johansen 103556974a6fSJohn Johansen 103656974a6fSJohn Johansen static struct aa_label *sk_peer_label(struct sock *sk) 103756974a6fSJohn Johansen { 103856974a6fSJohn Johansen struct aa_sk_ctx *ctx = SK_CTX(sk); 103956974a6fSJohn Johansen 104056974a6fSJohn Johansen if (ctx->peer) 104156974a6fSJohn Johansen return ctx->peer; 104256974a6fSJohn Johansen 104356974a6fSJohn Johansen return ERR_PTR(-ENOPROTOOPT); 104456974a6fSJohn Johansen } 104556974a6fSJohn Johansen 104656974a6fSJohn Johansen /** 104756974a6fSJohn Johansen * apparmor_socket_getpeersec_stream - get security context of peer 104856974a6fSJohn Johansen * 104956974a6fSJohn Johansen * Note: for tcp only valid if using ipsec or cipso on lan 105056974a6fSJohn Johansen */ 105156974a6fSJohn Johansen static int apparmor_socket_getpeersec_stream(struct socket *sock, 105256974a6fSJohn Johansen char __user *optval, 105356974a6fSJohn Johansen int __user *optlen, 105456974a6fSJohn Johansen unsigned int len) 105556974a6fSJohn Johansen { 105656974a6fSJohn Johansen char *name; 105756974a6fSJohn Johansen int slen, error = 0; 105856974a6fSJohn Johansen struct aa_label *label; 105956974a6fSJohn Johansen struct aa_label *peer; 106056974a6fSJohn Johansen 106156974a6fSJohn Johansen label = begin_current_label_crit_section(); 106256974a6fSJohn Johansen peer = sk_peer_label(sock->sk); 106356974a6fSJohn Johansen if (IS_ERR(peer)) { 106456974a6fSJohn Johansen error = PTR_ERR(peer); 106556974a6fSJohn Johansen goto done; 106656974a6fSJohn Johansen } 106756974a6fSJohn Johansen slen = aa_label_asxprint(&name, labels_ns(label), peer, 106856974a6fSJohn Johansen FLAG_SHOW_MODE | FLAG_VIEW_SUBNS | 106956974a6fSJohn Johansen FLAG_HIDDEN_UNCONFINED, GFP_KERNEL); 107056974a6fSJohn Johansen /* don't include terminating \0 in slen, it breaks some apps */ 107156974a6fSJohn Johansen if (slen < 0) { 107256974a6fSJohn Johansen error = -ENOMEM; 107356974a6fSJohn Johansen } else { 107456974a6fSJohn Johansen if (slen > len) { 107556974a6fSJohn Johansen error = -ERANGE; 107656974a6fSJohn Johansen } else if (copy_to_user(optval, name, slen)) { 107756974a6fSJohn Johansen error = -EFAULT; 107856974a6fSJohn Johansen goto out; 107956974a6fSJohn Johansen } 108056974a6fSJohn Johansen if (put_user(slen, optlen)) 108156974a6fSJohn Johansen error = -EFAULT; 108256974a6fSJohn Johansen out: 108356974a6fSJohn Johansen kfree(name); 108456974a6fSJohn Johansen 108556974a6fSJohn Johansen } 108656974a6fSJohn Johansen 108756974a6fSJohn Johansen done: 108856974a6fSJohn Johansen end_current_label_crit_section(label); 108956974a6fSJohn Johansen 109056974a6fSJohn Johansen return error; 109156974a6fSJohn Johansen } 109256974a6fSJohn Johansen 109356974a6fSJohn Johansen /** 109456974a6fSJohn Johansen * apparmor_socket_getpeersec_dgram - get security label of packet 109556974a6fSJohn Johansen * @sock: the peer socket 109656974a6fSJohn Johansen * @skb: packet data 109756974a6fSJohn Johansen * @secid: pointer to where to put the secid of the packet 109856974a6fSJohn Johansen * 109956974a6fSJohn Johansen * Sets the netlabel socket state on sk from parent 110056974a6fSJohn Johansen */ 110156974a6fSJohn Johansen static int apparmor_socket_getpeersec_dgram(struct socket *sock, 110256974a6fSJohn Johansen struct sk_buff *skb, u32 *secid) 110356974a6fSJohn Johansen 110456974a6fSJohn Johansen { 110556974a6fSJohn Johansen /* TODO: requires secid support */ 110656974a6fSJohn Johansen return -ENOPROTOOPT; 110756974a6fSJohn Johansen } 110856974a6fSJohn Johansen 110956974a6fSJohn Johansen /** 111056974a6fSJohn Johansen * apparmor_sock_graft - Initialize newly created socket 111156974a6fSJohn Johansen * @sk: child sock 111256974a6fSJohn Johansen * @parent: parent socket 111356974a6fSJohn Johansen * 111456974a6fSJohn Johansen * Note: could set off of SOCK_CTX(parent) but need to track inode and we can 111556974a6fSJohn Johansen * just set sk security information off of current creating process label 111656974a6fSJohn Johansen * Labeling of sk for accept case - probably should be sock based 111756974a6fSJohn Johansen * instead of task, because of the case where an implicitly labeled 111856974a6fSJohn Johansen * socket is shared by different tasks. 111956974a6fSJohn Johansen */ 112056974a6fSJohn Johansen static void apparmor_sock_graft(struct sock *sk, struct socket *parent) 112156974a6fSJohn Johansen { 112256974a6fSJohn Johansen struct aa_sk_ctx *ctx = SK_CTX(sk); 112356974a6fSJohn Johansen 112456974a6fSJohn Johansen if (!ctx->label) 112556974a6fSJohn Johansen ctx->label = aa_get_current_label(); 112656974a6fSJohn Johansen } 112756974a6fSJohn Johansen 1128ca97d939SJames Morris static struct security_hook_list apparmor_hooks[] __lsm_ro_after_init = { 1129e20b043aSCasey Schaufler LSM_HOOK_INIT(ptrace_access_check, apparmor_ptrace_access_check), 1130e20b043aSCasey Schaufler LSM_HOOK_INIT(ptrace_traceme, apparmor_ptrace_traceme), 1131e20b043aSCasey Schaufler LSM_HOOK_INIT(capget, apparmor_capget), 1132e20b043aSCasey Schaufler LSM_HOOK_INIT(capable, apparmor_capable), 1133b5e95b48SJohn Johansen 11342ea3ffb7SJohn Johansen LSM_HOOK_INIT(sb_mount, apparmor_sb_mount), 11352ea3ffb7SJohn Johansen LSM_HOOK_INIT(sb_umount, apparmor_sb_umount), 11362ea3ffb7SJohn Johansen LSM_HOOK_INIT(sb_pivotroot, apparmor_sb_pivotroot), 11372ea3ffb7SJohn Johansen 1138e20b043aSCasey Schaufler LSM_HOOK_INIT(path_link, apparmor_path_link), 1139e20b043aSCasey Schaufler LSM_HOOK_INIT(path_unlink, apparmor_path_unlink), 1140e20b043aSCasey Schaufler LSM_HOOK_INIT(path_symlink, apparmor_path_symlink), 1141e20b043aSCasey Schaufler LSM_HOOK_INIT(path_mkdir, apparmor_path_mkdir), 1142e20b043aSCasey Schaufler LSM_HOOK_INIT(path_rmdir, apparmor_path_rmdir), 1143e20b043aSCasey Schaufler LSM_HOOK_INIT(path_mknod, apparmor_path_mknod), 1144e20b043aSCasey Schaufler LSM_HOOK_INIT(path_rename, apparmor_path_rename), 1145e20b043aSCasey Schaufler LSM_HOOK_INIT(path_chmod, apparmor_path_chmod), 1146e20b043aSCasey Schaufler LSM_HOOK_INIT(path_chown, apparmor_path_chown), 1147e20b043aSCasey Schaufler LSM_HOOK_INIT(path_truncate, apparmor_path_truncate), 1148e20b043aSCasey Schaufler LSM_HOOK_INIT(inode_getattr, apparmor_inode_getattr), 1149b5e95b48SJohn Johansen 1150e20b043aSCasey Schaufler LSM_HOOK_INIT(file_open, apparmor_file_open), 1151064dc947SJohn Johansen LSM_HOOK_INIT(file_receive, apparmor_file_receive), 1152e20b043aSCasey Schaufler LSM_HOOK_INIT(file_permission, apparmor_file_permission), 1153e20b043aSCasey Schaufler LSM_HOOK_INIT(file_alloc_security, apparmor_file_alloc_security), 1154e20b043aSCasey Schaufler LSM_HOOK_INIT(file_free_security, apparmor_file_free_security), 1155e20b043aSCasey Schaufler LSM_HOOK_INIT(mmap_file, apparmor_mmap_file), 1156e20b043aSCasey Schaufler LSM_HOOK_INIT(file_mprotect, apparmor_file_mprotect), 1157e20b043aSCasey Schaufler LSM_HOOK_INIT(file_lock, apparmor_file_lock), 1158b5e95b48SJohn Johansen 1159e20b043aSCasey Schaufler LSM_HOOK_INIT(getprocattr, apparmor_getprocattr), 1160e20b043aSCasey Schaufler LSM_HOOK_INIT(setprocattr, apparmor_setprocattr), 1161b5e95b48SJohn Johansen 116256974a6fSJohn Johansen LSM_HOOK_INIT(sk_alloc_security, apparmor_sk_alloc_security), 116356974a6fSJohn Johansen LSM_HOOK_INIT(sk_free_security, apparmor_sk_free_security), 116456974a6fSJohn Johansen LSM_HOOK_INIT(sk_clone_security, apparmor_sk_clone_security), 116556974a6fSJohn Johansen 116656974a6fSJohn Johansen LSM_HOOK_INIT(socket_create, apparmor_socket_create), 116756974a6fSJohn Johansen LSM_HOOK_INIT(socket_post_create, apparmor_socket_post_create), 116856974a6fSJohn Johansen LSM_HOOK_INIT(socket_bind, apparmor_socket_bind), 116956974a6fSJohn Johansen LSM_HOOK_INIT(socket_connect, apparmor_socket_connect), 117056974a6fSJohn Johansen LSM_HOOK_INIT(socket_listen, apparmor_socket_listen), 117156974a6fSJohn Johansen LSM_HOOK_INIT(socket_accept, apparmor_socket_accept), 117256974a6fSJohn Johansen LSM_HOOK_INIT(socket_sendmsg, apparmor_socket_sendmsg), 117356974a6fSJohn Johansen LSM_HOOK_INIT(socket_recvmsg, apparmor_socket_recvmsg), 117456974a6fSJohn Johansen LSM_HOOK_INIT(socket_getsockname, apparmor_socket_getsockname), 117556974a6fSJohn Johansen LSM_HOOK_INIT(socket_getpeername, apparmor_socket_getpeername), 117656974a6fSJohn Johansen LSM_HOOK_INIT(socket_getsockopt, apparmor_socket_getsockopt), 117756974a6fSJohn Johansen LSM_HOOK_INIT(socket_setsockopt, apparmor_socket_setsockopt), 117856974a6fSJohn Johansen LSM_HOOK_INIT(socket_shutdown, apparmor_socket_shutdown), 117956974a6fSJohn Johansen LSM_HOOK_INIT(socket_sock_rcv_skb, apparmor_socket_sock_rcv_skb), 118056974a6fSJohn Johansen LSM_HOOK_INIT(socket_getpeersec_stream, 118156974a6fSJohn Johansen apparmor_socket_getpeersec_stream), 118256974a6fSJohn Johansen LSM_HOOK_INIT(socket_getpeersec_dgram, 118356974a6fSJohn Johansen apparmor_socket_getpeersec_dgram), 118456974a6fSJohn Johansen LSM_HOOK_INIT(sock_graft, apparmor_sock_graft), 118556974a6fSJohn Johansen 1186e20b043aSCasey Schaufler LSM_HOOK_INIT(cred_alloc_blank, apparmor_cred_alloc_blank), 1187e20b043aSCasey Schaufler LSM_HOOK_INIT(cred_free, apparmor_cred_free), 1188e20b043aSCasey Schaufler LSM_HOOK_INIT(cred_prepare, apparmor_cred_prepare), 1189e20b043aSCasey Schaufler LSM_HOOK_INIT(cred_transfer, apparmor_cred_transfer), 1190b5e95b48SJohn Johansen 1191e20b043aSCasey Schaufler LSM_HOOK_INIT(bprm_set_creds, apparmor_bprm_set_creds), 1192e20b043aSCasey Schaufler LSM_HOOK_INIT(bprm_committing_creds, apparmor_bprm_committing_creds), 1193e20b043aSCasey Schaufler LSM_HOOK_INIT(bprm_committed_creds, apparmor_bprm_committed_creds), 1194b5e95b48SJohn Johansen 11953b529a76SJohn Johansen LSM_HOOK_INIT(task_free, apparmor_task_free), 11963b529a76SJohn Johansen LSM_HOOK_INIT(task_alloc, apparmor_task_alloc), 1197a7ae3645SJohn Johansen LSM_HOOK_INIT(task_getsecid, apparmor_task_getsecid), 1198e20b043aSCasey Schaufler LSM_HOOK_INIT(task_setrlimit, apparmor_task_setrlimit), 1199cd1dbf76SJohn Johansen LSM_HOOK_INIT(task_kill, apparmor_task_kill), 1200c0929212SJohn Johansen 1201e79c26d0SMatthew Garrett #ifdef CONFIG_AUDIT 1202e79c26d0SMatthew Garrett LSM_HOOK_INIT(audit_rule_init, aa_audit_rule_init), 1203e79c26d0SMatthew Garrett LSM_HOOK_INIT(audit_rule_known, aa_audit_rule_known), 1204e79c26d0SMatthew Garrett LSM_HOOK_INIT(audit_rule_match, aa_audit_rule_match), 1205e79c26d0SMatthew Garrett LSM_HOOK_INIT(audit_rule_free, aa_audit_rule_free), 1206e79c26d0SMatthew Garrett #endif 1207e79c26d0SMatthew Garrett 1208c0929212SJohn Johansen LSM_HOOK_INIT(secid_to_secctx, apparmor_secid_to_secctx), 1209c0929212SJohn Johansen LSM_HOOK_INIT(secctx_to_secid, apparmor_secctx_to_secid), 1210c0929212SJohn Johansen LSM_HOOK_INIT(release_secctx, apparmor_release_secctx), 1211b5e95b48SJohn Johansen }; 1212b5e95b48SJohn Johansen 1213b5e95b48SJohn Johansen /* 1214b5e95b48SJohn Johansen * AppArmor sysfs module parameters 1215b5e95b48SJohn Johansen */ 1216b5e95b48SJohn Johansen 1217101d6c82SStephen Rothwell static int param_set_aabool(const char *val, const struct kernel_param *kp); 1218101d6c82SStephen Rothwell static int param_get_aabool(char *buffer, const struct kernel_param *kp); 1219b8aa09fdSRusty Russell #define param_check_aabool param_check_bool 12209c27847dSLuis R. Rodriguez static const struct kernel_param_ops param_ops_aabool = { 12216a4c2643SJani Nikula .flags = KERNEL_PARAM_OPS_FL_NOARG, 1222101d6c82SStephen Rothwell .set = param_set_aabool, 1223101d6c82SStephen Rothwell .get = param_get_aabool 1224101d6c82SStephen Rothwell }; 1225b5e95b48SJohn Johansen 1226101d6c82SStephen Rothwell static int param_set_aauint(const char *val, const struct kernel_param *kp); 1227101d6c82SStephen Rothwell static int param_get_aauint(char *buffer, const struct kernel_param *kp); 1228b8aa09fdSRusty Russell #define param_check_aauint param_check_uint 12299c27847dSLuis R. Rodriguez static const struct kernel_param_ops param_ops_aauint = { 1230101d6c82SStephen Rothwell .set = param_set_aauint, 1231101d6c82SStephen Rothwell .get = param_get_aauint 1232101d6c82SStephen Rothwell }; 1233b5e95b48SJohn Johansen 1234101d6c82SStephen Rothwell static int param_set_aalockpolicy(const char *val, const struct kernel_param *kp); 1235101d6c82SStephen Rothwell static int param_get_aalockpolicy(char *buffer, const struct kernel_param *kp); 1236b8aa09fdSRusty Russell #define param_check_aalockpolicy param_check_bool 12379c27847dSLuis R. Rodriguez static const struct kernel_param_ops param_ops_aalockpolicy = { 12386a4c2643SJani Nikula .flags = KERNEL_PARAM_OPS_FL_NOARG, 1239101d6c82SStephen Rothwell .set = param_set_aalockpolicy, 1240101d6c82SStephen Rothwell .get = param_get_aalockpolicy 1241101d6c82SStephen Rothwell }; 1242b5e95b48SJohn Johansen 1243e4dca7b7SKees Cook static int param_set_audit(const char *val, const struct kernel_param *kp); 1244e4dca7b7SKees Cook static int param_get_audit(char *buffer, const struct kernel_param *kp); 1245b5e95b48SJohn Johansen 1246e4dca7b7SKees Cook static int param_set_mode(const char *val, const struct kernel_param *kp); 1247e4dca7b7SKees Cook static int param_get_mode(char *buffer, const struct kernel_param *kp); 1248b5e95b48SJohn Johansen 1249b5e95b48SJohn Johansen /* Flag values, also controllable via /sys/module/apparmor/parameters 1250b5e95b48SJohn Johansen * We define special types as we want to do additional mediation. 1251b5e95b48SJohn Johansen */ 1252b5e95b48SJohn Johansen 1253b5e95b48SJohn Johansen /* AppArmor global enforcement switch - complain, enforce, kill */ 1254b5e95b48SJohn Johansen enum profile_mode aa_g_profile_mode = APPARMOR_ENFORCE; 1255b5e95b48SJohn Johansen module_param_call(mode, param_set_mode, param_get_mode, 1256b5e95b48SJohn Johansen &aa_g_profile_mode, S_IRUSR | S_IWUSR); 1257b5e95b48SJohn Johansen 12586059f71fSJohn Johansen /* whether policy verification hashing is enabled */ 12597616ac70SArnd Bergmann bool aa_g_hash_policy = IS_ENABLED(CONFIG_SECURITY_APPARMOR_HASH_DEFAULT); 12603ccb76c5SJohn Johansen #ifdef CONFIG_SECURITY_APPARMOR_HASH 12616059f71fSJohn Johansen module_param_named(hash_policy, aa_g_hash_policy, aabool, S_IRUSR | S_IWUSR); 12627616ac70SArnd Bergmann #endif 12636059f71fSJohn Johansen 1264b5e95b48SJohn Johansen /* Debug mode */ 1265eea7a05fSValentin Rothberg bool aa_g_debug = IS_ENABLED(CONFIG_SECURITY_APPARMOR_DEBUG_MESSAGES); 1266b5e95b48SJohn Johansen module_param_named(debug, aa_g_debug, aabool, S_IRUSR | S_IWUSR); 1267b5e95b48SJohn Johansen 1268b5e95b48SJohn Johansen /* Audit mode */ 1269b5e95b48SJohn Johansen enum audit_mode aa_g_audit; 1270b5e95b48SJohn Johansen module_param_call(audit, param_set_audit, param_get_audit, 1271b5e95b48SJohn Johansen &aa_g_audit, S_IRUSR | S_IWUSR); 1272b5e95b48SJohn Johansen 1273b5e95b48SJohn Johansen /* Determines if audit header is included in audited messages. This 1274b5e95b48SJohn Johansen * provides more context if the audit daemon is not running 1275b5e95b48SJohn Johansen */ 1276954317feSThomas Meyer bool aa_g_audit_header = true; 1277b5e95b48SJohn Johansen module_param_named(audit_header, aa_g_audit_header, aabool, 1278b5e95b48SJohn Johansen S_IRUSR | S_IWUSR); 1279b5e95b48SJohn Johansen 1280b5e95b48SJohn Johansen /* lock out loading/removal of policy 1281b5e95b48SJohn Johansen * TODO: add in at boot loading of policy, which is the only way to 1282b5e95b48SJohn Johansen * load policy, if lock_policy is set 1283b5e95b48SJohn Johansen */ 128490ab5ee9SRusty Russell bool aa_g_lock_policy; 1285b5e95b48SJohn Johansen module_param_named(lock_policy, aa_g_lock_policy, aalockpolicy, 1286b5e95b48SJohn Johansen S_IRUSR | S_IWUSR); 1287b5e95b48SJohn Johansen 1288b5e95b48SJohn Johansen /* Syscall logging mode */ 128990ab5ee9SRusty Russell bool aa_g_logsyscall; 1290b5e95b48SJohn Johansen module_param_named(logsyscall, aa_g_logsyscall, aabool, S_IRUSR | S_IWUSR); 1291b5e95b48SJohn Johansen 1292b5e95b48SJohn Johansen /* Maximum pathname length before accesses will start getting rejected */ 1293b5e95b48SJohn Johansen unsigned int aa_g_path_max = 2 * PATH_MAX; 1294622f6e32SJohn Johansen module_param_named(path_max, aa_g_path_max, aauint, S_IRUSR); 1295b5e95b48SJohn Johansen 1296b5e95b48SJohn Johansen /* Determines how paranoid loading of policy is and how much verification 1297b5e95b48SJohn Johansen * on the loaded policy is done. 1298abbf8734SJohn Johansen * DEPRECATED: read only as strict checking of load is always done now 1299abbf8734SJohn Johansen * that none root users (user namespaces) can load policy. 1300b5e95b48SJohn Johansen */ 1301954317feSThomas Meyer bool aa_g_paranoid_load = true; 1302abbf8734SJohn Johansen module_param_named(paranoid_load, aa_g_paranoid_load, aabool, S_IRUGO); 1303b5e95b48SJohn Johansen 1304b5e95b48SJohn Johansen /* Boot time disable flag */ 130590ab5ee9SRusty Russell static bool apparmor_enabled = CONFIG_SECURITY_APPARMOR_BOOTPARAM_VALUE; 1306c611616cSJohn Johansen module_param_named(enabled, apparmor_enabled, bool, S_IRUGO); 1307b5e95b48SJohn Johansen 1308b5e95b48SJohn Johansen static int __init apparmor_enabled_setup(char *str) 1309b5e95b48SJohn Johansen { 1310b5e95b48SJohn Johansen unsigned long enabled; 131129707b20SJingoo Han int error = kstrtoul(str, 0, &enabled); 1312b5e95b48SJohn Johansen if (!error) 1313b5e95b48SJohn Johansen apparmor_enabled = enabled ? 1 : 0; 1314b5e95b48SJohn Johansen return 1; 1315b5e95b48SJohn Johansen } 1316b5e95b48SJohn Johansen 1317b5e95b48SJohn Johansen __setup("apparmor=", apparmor_enabled_setup); 1318b5e95b48SJohn Johansen 1319b5e95b48SJohn Johansen /* set global flag turning off the ability to load policy */ 1320101d6c82SStephen Rothwell static int param_set_aalockpolicy(const char *val, const struct kernel_param *kp) 1321b5e95b48SJohn Johansen { 1322545de8feSJohn Johansen if (!apparmor_enabled) 1323545de8feSJohn Johansen return -EINVAL; 1324545de8feSJohn Johansen if (apparmor_initialized && !policy_admin_capable(NULL)) 1325b5e95b48SJohn Johansen return -EPERM; 1326b5e95b48SJohn Johansen return param_set_bool(val, kp); 1327b5e95b48SJohn Johansen } 1328b5e95b48SJohn Johansen 1329101d6c82SStephen Rothwell static int param_get_aalockpolicy(char *buffer, const struct kernel_param *kp) 1330b5e95b48SJohn Johansen { 1331ca4bd5aeSJohn Johansen if (!apparmor_enabled) 1332ca4bd5aeSJohn Johansen return -EINVAL; 1333545de8feSJohn Johansen if (apparmor_initialized && !policy_view_capable(NULL)) 1334545de8feSJohn Johansen return -EPERM; 1335b5e95b48SJohn Johansen return param_get_bool(buffer, kp); 1336b5e95b48SJohn Johansen } 1337b5e95b48SJohn Johansen 1338101d6c82SStephen Rothwell static int param_set_aabool(const char *val, const struct kernel_param *kp) 1339b5e95b48SJohn Johansen { 1340ca4bd5aeSJohn Johansen if (!apparmor_enabled) 1341ca4bd5aeSJohn Johansen return -EINVAL; 1342545de8feSJohn Johansen if (apparmor_initialized && !policy_admin_capable(NULL)) 1343545de8feSJohn Johansen return -EPERM; 1344b5e95b48SJohn Johansen return param_set_bool(val, kp); 1345b5e95b48SJohn Johansen } 1346b5e95b48SJohn Johansen 1347101d6c82SStephen Rothwell static int param_get_aabool(char *buffer, const struct kernel_param *kp) 1348b5e95b48SJohn Johansen { 1349ca4bd5aeSJohn Johansen if (!apparmor_enabled) 1350ca4bd5aeSJohn Johansen return -EINVAL; 1351545de8feSJohn Johansen if (apparmor_initialized && !policy_view_capable(NULL)) 1352545de8feSJohn Johansen return -EPERM; 1353b5e95b48SJohn Johansen return param_get_bool(buffer, kp); 1354b5e95b48SJohn Johansen } 1355b5e95b48SJohn Johansen 1356101d6c82SStephen Rothwell static int param_set_aauint(const char *val, const struct kernel_param *kp) 1357b5e95b48SJohn Johansen { 135839d84824SJohn Johansen int error; 135939d84824SJohn Johansen 1360ca4bd5aeSJohn Johansen if (!apparmor_enabled) 1361ca4bd5aeSJohn Johansen return -EINVAL; 136239d84824SJohn Johansen /* file is ro but enforce 2nd line check */ 136339d84824SJohn Johansen if (apparmor_initialized) 1364545de8feSJohn Johansen return -EPERM; 136539d84824SJohn Johansen 136639d84824SJohn Johansen error = param_set_uint(val, kp); 136739d84824SJohn Johansen pr_info("AppArmor: buffer size set to %d bytes\n", aa_g_path_max); 136839d84824SJohn Johansen 136939d84824SJohn Johansen return error; 1370b5e95b48SJohn Johansen } 1371b5e95b48SJohn Johansen 1372101d6c82SStephen Rothwell static int param_get_aauint(char *buffer, const struct kernel_param *kp) 1373b5e95b48SJohn Johansen { 1374ca4bd5aeSJohn Johansen if (!apparmor_enabled) 1375ca4bd5aeSJohn Johansen return -EINVAL; 1376545de8feSJohn Johansen if (apparmor_initialized && !policy_view_capable(NULL)) 1377545de8feSJohn Johansen return -EPERM; 1378b5e95b48SJohn Johansen return param_get_uint(buffer, kp); 1379b5e95b48SJohn Johansen } 1380b5e95b48SJohn Johansen 1381e4dca7b7SKees Cook static int param_get_audit(char *buffer, const struct kernel_param *kp) 1382b5e95b48SJohn Johansen { 1383b5e95b48SJohn Johansen if (!apparmor_enabled) 1384b5e95b48SJohn Johansen return -EINVAL; 1385545de8feSJohn Johansen if (apparmor_initialized && !policy_view_capable(NULL)) 1386545de8feSJohn Johansen return -EPERM; 1387b5e95b48SJohn Johansen return sprintf(buffer, "%s", audit_mode_names[aa_g_audit]); 1388b5e95b48SJohn Johansen } 1389b5e95b48SJohn Johansen 1390e4dca7b7SKees Cook static int param_set_audit(const char *val, const struct kernel_param *kp) 1391b5e95b48SJohn Johansen { 1392b5e95b48SJohn Johansen int i; 1393b5e95b48SJohn Johansen 1394b5e95b48SJohn Johansen if (!apparmor_enabled) 1395b5e95b48SJohn Johansen return -EINVAL; 1396b5e95b48SJohn Johansen if (!val) 1397b5e95b48SJohn Johansen return -EINVAL; 1398545de8feSJohn Johansen if (apparmor_initialized && !policy_admin_capable(NULL)) 1399545de8feSJohn Johansen return -EPERM; 1400b5e95b48SJohn Johansen 14015d8779a5SAndy Shevchenko i = match_string(audit_mode_names, AUDIT_MAX_INDEX, val); 14025d8779a5SAndy Shevchenko if (i < 0) 14035d8779a5SAndy Shevchenko return -EINVAL; 14045d8779a5SAndy Shevchenko 1405b5e95b48SJohn Johansen aa_g_audit = i; 1406b5e95b48SJohn Johansen return 0; 1407b5e95b48SJohn Johansen } 1408b5e95b48SJohn Johansen 1409e4dca7b7SKees Cook static int param_get_mode(char *buffer, const struct kernel_param *kp) 1410b5e95b48SJohn Johansen { 1411b5e95b48SJohn Johansen if (!apparmor_enabled) 1412b5e95b48SJohn Johansen return -EINVAL; 1413545de8feSJohn Johansen if (apparmor_initialized && !policy_view_capable(NULL)) 1414545de8feSJohn Johansen return -EPERM; 1415b5e95b48SJohn Johansen 14160d259f04SJohn Johansen return sprintf(buffer, "%s", aa_profile_mode_names[aa_g_profile_mode]); 1417b5e95b48SJohn Johansen } 1418b5e95b48SJohn Johansen 1419e4dca7b7SKees Cook static int param_set_mode(const char *val, const struct kernel_param *kp) 1420b5e95b48SJohn Johansen { 1421b5e95b48SJohn Johansen int i; 1422b5e95b48SJohn Johansen 1423b5e95b48SJohn Johansen if (!apparmor_enabled) 1424b5e95b48SJohn Johansen return -EINVAL; 1425b5e95b48SJohn Johansen if (!val) 1426b5e95b48SJohn Johansen return -EINVAL; 1427545de8feSJohn Johansen if (apparmor_initialized && !policy_admin_capable(NULL)) 1428545de8feSJohn Johansen return -EPERM; 1429b5e95b48SJohn Johansen 14305d8779a5SAndy Shevchenko i = match_string(aa_profile_mode_names, APPARMOR_MODE_NAMES_MAX_INDEX, 14315d8779a5SAndy Shevchenko val); 14325d8779a5SAndy Shevchenko if (i < 0) 14335d8779a5SAndy Shevchenko return -EINVAL; 14345d8779a5SAndy Shevchenko 1435b5e95b48SJohn Johansen aa_g_profile_mode = i; 1436b5e95b48SJohn Johansen return 0; 1437b5e95b48SJohn Johansen } 1438b5e95b48SJohn Johansen 1439b5e95b48SJohn Johansen /* 1440b5e95b48SJohn Johansen * AppArmor init functions 1441b5e95b48SJohn Johansen */ 1442b5e95b48SJohn Johansen 1443b5e95b48SJohn Johansen /** 144455a26ebfSJohn Johansen * set_init_ctx - set a task context and profile on the first task. 1445b5e95b48SJohn Johansen * 1446b5e95b48SJohn Johansen * TODO: allow setting an alternate profile than unconfined 1447b5e95b48SJohn Johansen */ 144855a26ebfSJohn Johansen static int __init set_init_ctx(void) 1449b5e95b48SJohn Johansen { 1450b5e95b48SJohn Johansen struct cred *cred = (struct cred *)current->real_cred; 145155a26ebfSJohn Johansen struct aa_task_ctx *ctx; 1452b5e95b48SJohn Johansen 1453f175221aSJohn Johansen ctx = aa_alloc_task_ctx(GFP_KERNEL); 145455a26ebfSJohn Johansen if (!ctx) 1455b5e95b48SJohn Johansen return -ENOMEM; 1456b5e95b48SJohn Johansen 1457d9087c49SJohn Johansen cred_label(cred) = aa_get_label(ns_unconfined(root_ns)); 1458f175221aSJohn Johansen task_ctx(current) = ctx; 1459b5e95b48SJohn Johansen 1460b5e95b48SJohn Johansen return 0; 1461b5e95b48SJohn Johansen } 1462b5e95b48SJohn Johansen 1463d4669f0bSJohn Johansen static void destroy_buffers(void) 1464d4669f0bSJohn Johansen { 1465d4669f0bSJohn Johansen u32 i, j; 1466d4669f0bSJohn Johansen 1467d4669f0bSJohn Johansen for_each_possible_cpu(i) { 1468d4669f0bSJohn Johansen for_each_cpu_buffer(j) { 1469d4669f0bSJohn Johansen kfree(per_cpu(aa_buffers, i).buf[j]); 1470d4669f0bSJohn Johansen per_cpu(aa_buffers, i).buf[j] = NULL; 1471d4669f0bSJohn Johansen } 1472d4669f0bSJohn Johansen } 1473d4669f0bSJohn Johansen } 1474d4669f0bSJohn Johansen 1475d4669f0bSJohn Johansen static int __init alloc_buffers(void) 1476d4669f0bSJohn Johansen { 1477d4669f0bSJohn Johansen u32 i, j; 1478d4669f0bSJohn Johansen 1479d4669f0bSJohn Johansen for_each_possible_cpu(i) { 1480d4669f0bSJohn Johansen for_each_cpu_buffer(j) { 1481d4669f0bSJohn Johansen char *buffer; 1482d4669f0bSJohn Johansen 1483d4669f0bSJohn Johansen if (cpu_to_node(i) > num_online_nodes()) 1484d4669f0bSJohn Johansen /* fallback to kmalloc for offline nodes */ 1485d4669f0bSJohn Johansen buffer = kmalloc(aa_g_path_max, GFP_KERNEL); 1486d4669f0bSJohn Johansen else 1487d4669f0bSJohn Johansen buffer = kmalloc_node(aa_g_path_max, GFP_KERNEL, 1488d4669f0bSJohn Johansen cpu_to_node(i)); 1489d4669f0bSJohn Johansen if (!buffer) { 1490d4669f0bSJohn Johansen destroy_buffers(); 1491d4669f0bSJohn Johansen return -ENOMEM; 1492d4669f0bSJohn Johansen } 1493d4669f0bSJohn Johansen per_cpu(aa_buffers, i).buf[j] = buffer; 1494d4669f0bSJohn Johansen } 1495d4669f0bSJohn Johansen } 1496d4669f0bSJohn Johansen 1497d4669f0bSJohn Johansen return 0; 1498d4669f0bSJohn Johansen } 1499d4669f0bSJohn Johansen 1500e3ea1ca5STyler Hicks #ifdef CONFIG_SYSCTL 1501e3ea1ca5STyler Hicks static int apparmor_dointvec(struct ctl_table *table, int write, 1502e3ea1ca5STyler Hicks void __user *buffer, size_t *lenp, loff_t *ppos) 1503e3ea1ca5STyler Hicks { 1504e3ea1ca5STyler Hicks if (!policy_admin_capable(NULL)) 1505e3ea1ca5STyler Hicks return -EPERM; 1506e3ea1ca5STyler Hicks if (!apparmor_enabled) 1507e3ea1ca5STyler Hicks return -EINVAL; 1508e3ea1ca5STyler Hicks 1509e3ea1ca5STyler Hicks return proc_dointvec(table, write, buffer, lenp, ppos); 1510e3ea1ca5STyler Hicks } 1511e3ea1ca5STyler Hicks 1512e3ea1ca5STyler Hicks static struct ctl_path apparmor_sysctl_path[] = { 1513e3ea1ca5STyler Hicks { .procname = "kernel", }, 1514e3ea1ca5STyler Hicks { } 1515e3ea1ca5STyler Hicks }; 1516e3ea1ca5STyler Hicks 1517e3ea1ca5STyler Hicks static struct ctl_table apparmor_sysctl_table[] = { 1518e3ea1ca5STyler Hicks { 1519e3ea1ca5STyler Hicks .procname = "unprivileged_userns_apparmor_policy", 1520e3ea1ca5STyler Hicks .data = &unprivileged_userns_apparmor_policy, 1521e3ea1ca5STyler Hicks .maxlen = sizeof(int), 1522e3ea1ca5STyler Hicks .mode = 0600, 1523e3ea1ca5STyler Hicks .proc_handler = apparmor_dointvec, 1524e3ea1ca5STyler Hicks }, 1525e3ea1ca5STyler Hicks { } 1526e3ea1ca5STyler Hicks }; 1527e3ea1ca5STyler Hicks 1528e3ea1ca5STyler Hicks static int __init apparmor_init_sysctl(void) 1529e3ea1ca5STyler Hicks { 1530e3ea1ca5STyler Hicks return register_sysctl_paths(apparmor_sysctl_path, 1531e3ea1ca5STyler Hicks apparmor_sysctl_table) ? 0 : -ENOMEM; 1532e3ea1ca5STyler Hicks } 1533e3ea1ca5STyler Hicks #else 1534e3ea1ca5STyler Hicks static inline int apparmor_init_sysctl(void) 1535e3ea1ca5STyler Hicks { 1536e3ea1ca5STyler Hicks return 0; 1537e3ea1ca5STyler Hicks } 1538e3ea1ca5STyler Hicks #endif /* CONFIG_SYSCTL */ 1539e3ea1ca5STyler Hicks 1540b5e95b48SJohn Johansen static int __init apparmor_init(void) 1541b5e95b48SJohn Johansen { 1542b5e95b48SJohn Johansen int error; 1543b5e95b48SJohn Johansen 1544b1d9e6b0SCasey Schaufler if (!apparmor_enabled || !security_module_enable("apparmor")) { 1545b5e95b48SJohn Johansen aa_info_message("AppArmor disabled by boot time parameter"); 1546954317feSThomas Meyer apparmor_enabled = false; 1547b5e95b48SJohn Johansen return 0; 1548b5e95b48SJohn Johansen } 1549b5e95b48SJohn Johansen 1550*a4c3f89cSJohn Johansen aa_secids_init(); 1551*a4c3f89cSJohn Johansen 155211c236b8SJohn Johansen error = aa_setup_dfa_engine(); 155311c236b8SJohn Johansen if (error) { 155411c236b8SJohn Johansen AA_ERROR("Unable to setup dfa engine\n"); 155511c236b8SJohn Johansen goto alloc_out; 155611c236b8SJohn Johansen } 155711c236b8SJohn Johansen 1558b5e95b48SJohn Johansen error = aa_alloc_root_ns(); 1559b5e95b48SJohn Johansen if (error) { 1560b5e95b48SJohn Johansen AA_ERROR("Unable to allocate default profile namespace\n"); 1561b5e95b48SJohn Johansen goto alloc_out; 1562b5e95b48SJohn Johansen } 1563b5e95b48SJohn Johansen 1564e3ea1ca5STyler Hicks error = apparmor_init_sysctl(); 1565e3ea1ca5STyler Hicks if (error) { 1566e3ea1ca5STyler Hicks AA_ERROR("Unable to register sysctls\n"); 1567e3ea1ca5STyler Hicks goto alloc_out; 1568e3ea1ca5STyler Hicks 1569e3ea1ca5STyler Hicks } 1570e3ea1ca5STyler Hicks 1571d4669f0bSJohn Johansen error = alloc_buffers(); 1572d4669f0bSJohn Johansen if (error) { 1573d4669f0bSJohn Johansen AA_ERROR("Unable to allocate work buffers\n"); 1574d4669f0bSJohn Johansen goto buffers_out; 1575d4669f0bSJohn Johansen } 1576d4669f0bSJohn Johansen 157755a26ebfSJohn Johansen error = set_init_ctx(); 1578b5e95b48SJohn Johansen if (error) { 1579b5e95b48SJohn Johansen AA_ERROR("Failed to set context on init task\n"); 1580b1d9e6b0SCasey Schaufler aa_free_root_ns(); 1581d4669f0bSJohn Johansen goto buffers_out; 1582b5e95b48SJohn Johansen } 1583d69dece5SCasey Schaufler security_add_hooks(apparmor_hooks, ARRAY_SIZE(apparmor_hooks), 1584d69dece5SCasey Schaufler "apparmor"); 1585b5e95b48SJohn Johansen 1586b5e95b48SJohn Johansen /* Report that AppArmor successfully initialized */ 1587b5e95b48SJohn Johansen apparmor_initialized = 1; 1588b5e95b48SJohn Johansen if (aa_g_profile_mode == APPARMOR_COMPLAIN) 1589b5e95b48SJohn Johansen aa_info_message("AppArmor initialized: complain mode enabled"); 1590b5e95b48SJohn Johansen else if (aa_g_profile_mode == APPARMOR_KILL) 1591b5e95b48SJohn Johansen aa_info_message("AppArmor initialized: kill mode enabled"); 1592b5e95b48SJohn Johansen else 1593b5e95b48SJohn Johansen aa_info_message("AppArmor initialized"); 1594b5e95b48SJohn Johansen 1595b5e95b48SJohn Johansen return error; 1596b5e95b48SJohn Johansen 1597d4669f0bSJohn Johansen buffers_out: 1598d4669f0bSJohn Johansen destroy_buffers(); 1599d4669f0bSJohn Johansen 1600b5e95b48SJohn Johansen alloc_out: 1601b5e95b48SJohn Johansen aa_destroy_aafs(); 160211c236b8SJohn Johansen aa_teardown_dfa_engine(); 1603b5e95b48SJohn Johansen 1604954317feSThomas Meyer apparmor_enabled = false; 1605b5e95b48SJohn Johansen return error; 1606b5e95b48SJohn Johansen } 1607b5e95b48SJohn Johansen 1608b5e95b48SJohn Johansen security_initcall(apparmor_init); 1609