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> 26e025be0fSWilliam Hua #include <linux/kmemleak.h> 27b5e95b48SJohn Johansen #include <net/sock.h> 28b5e95b48SJohn Johansen 29b5e95b48SJohn Johansen #include "include/apparmor.h" 30b5e95b48SJohn Johansen #include "include/apparmorfs.h" 31b5e95b48SJohn Johansen #include "include/audit.h" 32b5e95b48SJohn Johansen #include "include/capability.h" 33b5e95b48SJohn Johansen #include "include/context.h" 34b5e95b48SJohn Johansen #include "include/file.h" 35b5e95b48SJohn Johansen #include "include/ipc.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" 42b5e95b48SJohn Johansen 43b5e95b48SJohn Johansen /* Flag indicating whether initialization completed */ 44545de8feSJohn Johansen int apparmor_initialized; 45b5e95b48SJohn Johansen 46d4669f0bSJohn Johansen DEFINE_PER_CPU(struct aa_buffers, aa_buffers); 47d4669f0bSJohn Johansen 48d4669f0bSJohn Johansen 49b5e95b48SJohn Johansen /* 50b5e95b48SJohn Johansen * LSM hook functions 51b5e95b48SJohn Johansen */ 52b5e95b48SJohn Johansen 53b5e95b48SJohn Johansen /* 54637f688dSJohn Johansen * free the associated aa_task_ctx and put its labels 55b5e95b48SJohn Johansen */ 56b5e95b48SJohn Johansen static void apparmor_cred_free(struct cred *cred) 57b5e95b48SJohn Johansen { 5855a26ebfSJohn Johansen aa_free_task_context(cred_ctx(cred)); 5955a26ebfSJohn Johansen cred_ctx(cred) = NULL; 60b5e95b48SJohn Johansen } 61b5e95b48SJohn Johansen 62b5e95b48SJohn Johansen /* 63b5e95b48SJohn Johansen * allocate the apparmor part of blank credentials 64b5e95b48SJohn Johansen */ 65b5e95b48SJohn Johansen static int apparmor_cred_alloc_blank(struct cred *cred, gfp_t gfp) 66b5e95b48SJohn Johansen { 67b5e95b48SJohn Johansen /* freed by apparmor_cred_free */ 6855a26ebfSJohn Johansen struct aa_task_ctx *ctx = aa_alloc_task_context(gfp); 6955a26ebfSJohn Johansen 7055a26ebfSJohn Johansen if (!ctx) 71b5e95b48SJohn Johansen return -ENOMEM; 72b5e95b48SJohn Johansen 7355a26ebfSJohn Johansen cred_ctx(cred) = ctx; 74b5e95b48SJohn Johansen return 0; 75b5e95b48SJohn Johansen } 76b5e95b48SJohn Johansen 77b5e95b48SJohn Johansen /* 7855a26ebfSJohn Johansen * prepare new aa_task_ctx for modification by prepare_cred block 79b5e95b48SJohn Johansen */ 80b5e95b48SJohn Johansen static int apparmor_cred_prepare(struct cred *new, const struct cred *old, 81b5e95b48SJohn Johansen gfp_t gfp) 82b5e95b48SJohn Johansen { 83b5e95b48SJohn Johansen /* freed by apparmor_cred_free */ 8455a26ebfSJohn Johansen struct aa_task_ctx *ctx = aa_alloc_task_context(gfp); 8555a26ebfSJohn Johansen 8655a26ebfSJohn Johansen if (!ctx) 87b5e95b48SJohn Johansen return -ENOMEM; 88b5e95b48SJohn Johansen 8955a26ebfSJohn Johansen aa_dup_task_context(ctx, cred_ctx(old)); 9055a26ebfSJohn Johansen cred_ctx(new) = ctx; 91b5e95b48SJohn Johansen return 0; 92b5e95b48SJohn Johansen } 93b5e95b48SJohn Johansen 94b5e95b48SJohn Johansen /* 95b5e95b48SJohn Johansen * transfer the apparmor data to a blank set of creds 96b5e95b48SJohn Johansen */ 97b5e95b48SJohn Johansen static void apparmor_cred_transfer(struct cred *new, const struct cred *old) 98b5e95b48SJohn Johansen { 9955a26ebfSJohn Johansen const struct aa_task_ctx *old_ctx = cred_ctx(old); 10055a26ebfSJohn Johansen struct aa_task_ctx *new_ctx = cred_ctx(new); 101b5e95b48SJohn Johansen 10255a26ebfSJohn Johansen aa_dup_task_context(new_ctx, old_ctx); 103b5e95b48SJohn Johansen } 104b5e95b48SJohn Johansen 105b5e95b48SJohn Johansen static int apparmor_ptrace_access_check(struct task_struct *child, 106b5e95b48SJohn Johansen unsigned int mode) 107b5e95b48SJohn Johansen { 108b2d09ae4SJohn Johansen struct aa_label *tracer, *tracee; 109b2d09ae4SJohn Johansen int error; 110b2d09ae4SJohn Johansen 111b2d09ae4SJohn Johansen tracer = begin_current_label_crit_section(); 112b2d09ae4SJohn Johansen tracee = aa_get_task_label(child); 113b2d09ae4SJohn Johansen error = aa_may_ptrace(tracer, tracee, 114b2d09ae4SJohn Johansen mode == PTRACE_MODE_READ ? AA_PTRACE_READ : AA_PTRACE_TRACE); 115b2d09ae4SJohn Johansen aa_put_label(tracee); 116b2d09ae4SJohn Johansen end_current_label_crit_section(tracer); 117b2d09ae4SJohn Johansen 118b2d09ae4SJohn Johansen return error; 119b5e95b48SJohn Johansen } 120b5e95b48SJohn Johansen 121b5e95b48SJohn Johansen static int apparmor_ptrace_traceme(struct task_struct *parent) 122b5e95b48SJohn Johansen { 123b2d09ae4SJohn Johansen struct aa_label *tracer, *tracee; 124b2d09ae4SJohn Johansen int error; 125b2d09ae4SJohn Johansen 126b2d09ae4SJohn Johansen tracee = begin_current_label_crit_section(); 127b2d09ae4SJohn Johansen tracer = aa_get_task_label(parent); 128b2d09ae4SJohn Johansen error = aa_may_ptrace(tracer, tracee, AA_PTRACE_TRACE); 129b2d09ae4SJohn Johansen aa_put_label(tracer); 130b2d09ae4SJohn Johansen end_current_label_crit_section(tracee); 131b2d09ae4SJohn Johansen 132b2d09ae4SJohn Johansen return error; 133b5e95b48SJohn Johansen } 134b5e95b48SJohn Johansen 135b5e95b48SJohn Johansen /* Derived from security/commoncap.c:cap_capget */ 136b5e95b48SJohn Johansen static int apparmor_capget(struct task_struct *target, kernel_cap_t *effective, 137b5e95b48SJohn Johansen kernel_cap_t *inheritable, kernel_cap_t *permitted) 138b5e95b48SJohn Johansen { 139637f688dSJohn Johansen struct aa_label *label; 140b5e95b48SJohn Johansen const struct cred *cred; 141b5e95b48SJohn Johansen 142b5e95b48SJohn Johansen rcu_read_lock(); 143b5e95b48SJohn Johansen cred = __task_cred(target); 144637f688dSJohn Johansen label = aa_get_newest_cred_label(cred); 145c70c86c4SJohn Johansen 146b1d9e6b0SCasey Schaufler /* 147b1d9e6b0SCasey Schaufler * cap_capget is stacked ahead of this and will 148b1d9e6b0SCasey Schaufler * initialize effective and permitted. 149b1d9e6b0SCasey Schaufler */ 150c70c86c4SJohn Johansen if (!unconfined(label)) { 151c70c86c4SJohn Johansen struct aa_profile *profile; 152c70c86c4SJohn Johansen struct label_it i; 153c70c86c4SJohn Johansen 154c70c86c4SJohn Johansen label_for_each_confined(i, label, profile) { 155c70c86c4SJohn Johansen if (COMPLAIN_MODE(profile)) 156c70c86c4SJohn Johansen continue; 157c70c86c4SJohn Johansen *effective = cap_intersect(*effective, 158c70c86c4SJohn Johansen profile->caps.allow); 159c70c86c4SJohn Johansen *permitted = cap_intersect(*permitted, 160c70c86c4SJohn Johansen profile->caps.allow); 161c70c86c4SJohn Johansen } 162b5e95b48SJohn Johansen } 163b5e95b48SJohn Johansen rcu_read_unlock(); 164637f688dSJohn Johansen aa_put_label(label); 165b5e95b48SJohn Johansen 166b5e95b48SJohn Johansen return 0; 167b5e95b48SJohn Johansen } 168b5e95b48SJohn Johansen 1696a9de491SEric Paris static int apparmor_capable(const struct cred *cred, struct user_namespace *ns, 1706a9de491SEric Paris int cap, int audit) 171b5e95b48SJohn Johansen { 172637f688dSJohn Johansen struct aa_label *label; 173b1d9e6b0SCasey Schaufler int error = 0; 174b1d9e6b0SCasey Schaufler 175637f688dSJohn Johansen label = aa_get_newest_cred_label(cred); 176637f688dSJohn Johansen if (!unconfined(label)) 177c70c86c4SJohn Johansen error = aa_capable(label, cap, audit); 178637f688dSJohn Johansen aa_put_label(label); 179cf797c0eSJohn Johansen 180b5e95b48SJohn Johansen return error; 181b5e95b48SJohn Johansen } 182b5e95b48SJohn Johansen 183b5e95b48SJohn Johansen /** 184b5e95b48SJohn Johansen * common_perm - basic common permission check wrapper fn for paths 185b5e95b48SJohn Johansen * @op: operation being checked 186b5e95b48SJohn Johansen * @path: path to check permission of (NOT NULL) 187b5e95b48SJohn Johansen * @mask: requested permissions mask 188b5e95b48SJohn Johansen * @cond: conditional info for the permission request (NOT NULL) 189b5e95b48SJohn Johansen * 190b5e95b48SJohn Johansen * Returns: %0 else error code if error or permission denied 191b5e95b48SJohn Johansen */ 19247f6e5ccSJohn Johansen static int common_perm(const char *op, const struct path *path, u32 mask, 193b5e95b48SJohn Johansen struct path_cond *cond) 194b5e95b48SJohn Johansen { 195637f688dSJohn Johansen struct aa_label *label; 196b5e95b48SJohn Johansen int error = 0; 197b5e95b48SJohn Johansen 198637f688dSJohn Johansen label = __begin_current_label_crit_section(); 199637f688dSJohn Johansen if (!unconfined(label)) 200aebd873eSJohn Johansen error = aa_path_perm(op, label, path, 0, mask, cond); 201637f688dSJohn Johansen __end_current_label_crit_section(label); 202b5e95b48SJohn Johansen 203b5e95b48SJohn Johansen return error; 204b5e95b48SJohn Johansen } 205b5e95b48SJohn Johansen 206b5e95b48SJohn Johansen /** 20731f75bfeSJohn Johansen * common_perm_cond - common permission wrapper around inode cond 20831f75bfeSJohn Johansen * @op: operation being checked 20931f75bfeSJohn Johansen * @path: location to check (NOT NULL) 21031f75bfeSJohn Johansen * @mask: requested permissions mask 21131f75bfeSJohn Johansen * 21231f75bfeSJohn Johansen * Returns: %0 else error code if error or permission denied 21331f75bfeSJohn Johansen */ 21431f75bfeSJohn Johansen static int common_perm_cond(const char *op, const struct path *path, u32 mask) 21531f75bfeSJohn Johansen { 21631f75bfeSJohn Johansen struct path_cond cond = { d_backing_inode(path->dentry)->i_uid, 21731f75bfeSJohn Johansen d_backing_inode(path->dentry)->i_mode 21831f75bfeSJohn Johansen }; 21931f75bfeSJohn Johansen 22031f75bfeSJohn Johansen if (!path_mediated_fs(path->dentry)) 22131f75bfeSJohn Johansen return 0; 22231f75bfeSJohn Johansen 22331f75bfeSJohn Johansen return common_perm(op, path, mask, &cond); 22431f75bfeSJohn Johansen } 22531f75bfeSJohn Johansen 22631f75bfeSJohn Johansen /** 227b5e95b48SJohn Johansen * common_perm_dir_dentry - common permission wrapper when path is dir, dentry 228b5e95b48SJohn Johansen * @op: operation being checked 229b5e95b48SJohn Johansen * @dir: directory of the dentry (NOT NULL) 230b5e95b48SJohn Johansen * @dentry: dentry to check (NOT NULL) 231b5e95b48SJohn Johansen * @mask: requested permissions mask 232b5e95b48SJohn Johansen * @cond: conditional info for the permission request (NOT NULL) 233b5e95b48SJohn Johansen * 234b5e95b48SJohn Johansen * Returns: %0 else error code if error or permission denied 235b5e95b48SJohn Johansen */ 23647f6e5ccSJohn Johansen static int common_perm_dir_dentry(const char *op, const struct path *dir, 237b5e95b48SJohn Johansen struct dentry *dentry, u32 mask, 238b5e95b48SJohn Johansen struct path_cond *cond) 239b5e95b48SJohn Johansen { 2408486adf0SKees Cook struct path path = { .mnt = dir->mnt, .dentry = dentry }; 241b5e95b48SJohn Johansen 242b5e95b48SJohn Johansen return common_perm(op, &path, mask, cond); 243b5e95b48SJohn Johansen } 244b5e95b48SJohn Johansen 245b5e95b48SJohn Johansen /** 246b5e95b48SJohn Johansen * common_perm_rm - common permission wrapper for operations doing rm 247b5e95b48SJohn Johansen * @op: operation being checked 248b5e95b48SJohn Johansen * @dir: directory that the dentry is in (NOT NULL) 249b5e95b48SJohn Johansen * @dentry: dentry being rm'd (NOT NULL) 250b5e95b48SJohn Johansen * @mask: requested permission mask 251b5e95b48SJohn Johansen * 252b5e95b48SJohn Johansen * Returns: %0 else error code if error or permission denied 253b5e95b48SJohn Johansen */ 25447f6e5ccSJohn Johansen static int common_perm_rm(const char *op, const struct path *dir, 255b5e95b48SJohn Johansen struct dentry *dentry, u32 mask) 256b5e95b48SJohn Johansen { 257c6f493d6SDavid Howells struct inode *inode = d_backing_inode(dentry); 258b5e95b48SJohn Johansen struct path_cond cond = { }; 259b5e95b48SJohn Johansen 260efeee83aSJohn Johansen if (!inode || !path_mediated_fs(dentry)) 261b5e95b48SJohn Johansen return 0; 262b5e95b48SJohn Johansen 263b5e95b48SJohn Johansen cond.uid = inode->i_uid; 264b5e95b48SJohn Johansen cond.mode = inode->i_mode; 265b5e95b48SJohn Johansen 266b5e95b48SJohn Johansen return common_perm_dir_dentry(op, dir, dentry, mask, &cond); 267b5e95b48SJohn Johansen } 268b5e95b48SJohn Johansen 269b5e95b48SJohn Johansen /** 270b5e95b48SJohn Johansen * common_perm_create - common permission wrapper for operations doing create 271b5e95b48SJohn Johansen * @op: operation being checked 272b5e95b48SJohn Johansen * @dir: directory that dentry will be created in (NOT NULL) 273b5e95b48SJohn Johansen * @dentry: dentry to create (NOT NULL) 274b5e95b48SJohn Johansen * @mask: request permission mask 275b5e95b48SJohn Johansen * @mode: created file mode 276b5e95b48SJohn Johansen * 277b5e95b48SJohn Johansen * Returns: %0 else error code if error or permission denied 278b5e95b48SJohn Johansen */ 27947f6e5ccSJohn Johansen static int common_perm_create(const char *op, const struct path *dir, 280d6b49f7aSAl Viro struct dentry *dentry, u32 mask, umode_t mode) 281b5e95b48SJohn Johansen { 282b5e95b48SJohn Johansen struct path_cond cond = { current_fsuid(), mode }; 283b5e95b48SJohn Johansen 284efeee83aSJohn Johansen if (!path_mediated_fs(dir->dentry)) 285b5e95b48SJohn Johansen return 0; 286b5e95b48SJohn Johansen 287b5e95b48SJohn Johansen return common_perm_dir_dentry(op, dir, dentry, mask, &cond); 288b5e95b48SJohn Johansen } 289b5e95b48SJohn Johansen 290989f74e0SAl Viro static int apparmor_path_unlink(const struct path *dir, struct dentry *dentry) 291b5e95b48SJohn Johansen { 292b5e95b48SJohn Johansen return common_perm_rm(OP_UNLINK, dir, dentry, AA_MAY_DELETE); 293b5e95b48SJohn Johansen } 294b5e95b48SJohn Johansen 295d3607752SAl Viro static int apparmor_path_mkdir(const struct path *dir, struct dentry *dentry, 2964572befeSAl Viro umode_t mode) 297b5e95b48SJohn Johansen { 298b5e95b48SJohn Johansen return common_perm_create(OP_MKDIR, dir, dentry, AA_MAY_CREATE, 299b5e95b48SJohn Johansen S_IFDIR); 300b5e95b48SJohn Johansen } 301b5e95b48SJohn Johansen 302989f74e0SAl Viro static int apparmor_path_rmdir(const struct path *dir, struct dentry *dentry) 303b5e95b48SJohn Johansen { 304b5e95b48SJohn Johansen return common_perm_rm(OP_RMDIR, dir, dentry, AA_MAY_DELETE); 305b5e95b48SJohn Johansen } 306b5e95b48SJohn Johansen 307d3607752SAl Viro static int apparmor_path_mknod(const struct path *dir, struct dentry *dentry, 30804fc66e7SAl Viro umode_t mode, unsigned int dev) 309b5e95b48SJohn Johansen { 310b5e95b48SJohn Johansen return common_perm_create(OP_MKNOD, dir, dentry, AA_MAY_CREATE, mode); 311b5e95b48SJohn Johansen } 312b5e95b48SJohn Johansen 31381f4c506SAl Viro static int apparmor_path_truncate(const struct path *path) 314b5e95b48SJohn Johansen { 315e53cfe6cSJohn Johansen return common_perm_cond(OP_TRUNC, path, MAY_WRITE | AA_MAY_SETATTR); 316b5e95b48SJohn Johansen } 317b5e95b48SJohn Johansen 318d3607752SAl Viro static int apparmor_path_symlink(const struct path *dir, struct dentry *dentry, 319b5e95b48SJohn Johansen const char *old_name) 320b5e95b48SJohn Johansen { 321b5e95b48SJohn Johansen return common_perm_create(OP_SYMLINK, dir, dentry, AA_MAY_CREATE, 322b5e95b48SJohn Johansen S_IFLNK); 323b5e95b48SJohn Johansen } 324b5e95b48SJohn Johansen 3253ccee46aSAl Viro static int apparmor_path_link(struct dentry *old_dentry, const struct path *new_dir, 326b5e95b48SJohn Johansen struct dentry *new_dentry) 327b5e95b48SJohn Johansen { 328637f688dSJohn Johansen struct aa_label *label; 329b5e95b48SJohn Johansen int error = 0; 330b5e95b48SJohn Johansen 331efeee83aSJohn Johansen if (!path_mediated_fs(old_dentry)) 332b5e95b48SJohn Johansen return 0; 333b5e95b48SJohn Johansen 334637f688dSJohn Johansen label = begin_current_label_crit_section(); 335637f688dSJohn Johansen if (!unconfined(label)) 3368014370fSJohn Johansen error = aa_path_link(label, old_dentry, new_dir, new_dentry); 337637f688dSJohn Johansen end_current_label_crit_section(label); 338cf797c0eSJohn Johansen 339b5e95b48SJohn Johansen return error; 340b5e95b48SJohn Johansen } 341b5e95b48SJohn Johansen 3423ccee46aSAl Viro static int apparmor_path_rename(const struct path *old_dir, struct dentry *old_dentry, 3433ccee46aSAl Viro const struct path *new_dir, struct dentry *new_dentry) 344b5e95b48SJohn Johansen { 345637f688dSJohn Johansen struct aa_label *label; 346b5e95b48SJohn Johansen int error = 0; 347b5e95b48SJohn Johansen 348efeee83aSJohn Johansen if (!path_mediated_fs(old_dentry)) 349b5e95b48SJohn Johansen return 0; 350b5e95b48SJohn Johansen 351637f688dSJohn Johansen label = begin_current_label_crit_section(); 352637f688dSJohn Johansen if (!unconfined(label)) { 3538486adf0SKees Cook struct path old_path = { .mnt = old_dir->mnt, 3548486adf0SKees Cook .dentry = old_dentry }; 3558486adf0SKees Cook struct path new_path = { .mnt = new_dir->mnt, 3568486adf0SKees Cook .dentry = new_dentry }; 357c6f493d6SDavid Howells struct path_cond cond = { d_backing_inode(old_dentry)->i_uid, 358c6f493d6SDavid Howells d_backing_inode(old_dentry)->i_mode 359b5e95b48SJohn Johansen }; 360b5e95b48SJohn Johansen 361aebd873eSJohn Johansen error = aa_path_perm(OP_RENAME_SRC, label, &old_path, 0, 362e53cfe6cSJohn Johansen MAY_READ | AA_MAY_GETATTR | MAY_WRITE | 363e53cfe6cSJohn Johansen AA_MAY_SETATTR | AA_MAY_DELETE, 364b5e95b48SJohn Johansen &cond); 365b5e95b48SJohn Johansen if (!error) 366aebd873eSJohn Johansen error = aa_path_perm(OP_RENAME_DEST, label, &new_path, 367e53cfe6cSJohn Johansen 0, MAY_WRITE | AA_MAY_SETATTR | 368b5e95b48SJohn Johansen AA_MAY_CREATE, &cond); 369b5e95b48SJohn Johansen 370b5e95b48SJohn Johansen } 371637f688dSJohn Johansen end_current_label_crit_section(label); 372cf797c0eSJohn Johansen 373b5e95b48SJohn Johansen return error; 374b5e95b48SJohn Johansen } 375b5e95b48SJohn Johansen 376be01f9f2SAl Viro static int apparmor_path_chmod(const struct path *path, umode_t mode) 377b5e95b48SJohn Johansen { 37831f75bfeSJohn Johansen return common_perm_cond(OP_CHMOD, path, AA_MAY_CHMOD); 379b5e95b48SJohn Johansen } 380b5e95b48SJohn Johansen 3817fd25dacSAl Viro static int apparmor_path_chown(const struct path *path, kuid_t uid, kgid_t gid) 382b5e95b48SJohn Johansen { 38331f75bfeSJohn Johansen return common_perm_cond(OP_CHOWN, path, AA_MAY_CHOWN); 384b5e95b48SJohn Johansen } 385b5e95b48SJohn Johansen 3863f7036a0SAl Viro static int apparmor_inode_getattr(const struct path *path) 387b5e95b48SJohn Johansen { 388e53cfe6cSJohn Johansen return common_perm_cond(OP_GETATTR, path, AA_MAY_GETATTR); 389b5e95b48SJohn Johansen } 390b5e95b48SJohn Johansen 39183d49856SEric Paris static int apparmor_file_open(struct file *file, const struct cred *cred) 392b5e95b48SJohn Johansen { 393637f688dSJohn Johansen struct aa_file_ctx *fctx = file_ctx(file); 394637f688dSJohn Johansen struct aa_label *label; 395b5e95b48SJohn Johansen int error = 0; 396b5e95b48SJohn Johansen 397efeee83aSJohn Johansen if (!path_mediated_fs(file->f_path.dentry)) 398b5e95b48SJohn Johansen return 0; 399b5e95b48SJohn Johansen 400b5e95b48SJohn Johansen /* If in exec, permission is handled by bprm hooks. 401b5e95b48SJohn Johansen * Cache permissions granted by the previous exec check, with 402b5e95b48SJohn Johansen * implicit read and executable mmap which are required to 403b5e95b48SJohn Johansen * actually execute the image. 404b5e95b48SJohn Johansen */ 405b5e95b48SJohn Johansen if (current->in_execve) { 40655a26ebfSJohn Johansen fctx->allow = MAY_EXEC | MAY_READ | AA_EXEC_MMAP; 407b5e95b48SJohn Johansen return 0; 408b5e95b48SJohn Johansen } 409b5e95b48SJohn Johansen 410637f688dSJohn Johansen label = aa_get_newest_cred_label(cred); 411637f688dSJohn Johansen if (!unconfined(label)) { 412496ad9aaSAl Viro struct inode *inode = file_inode(file); 413b5e95b48SJohn Johansen struct path_cond cond = { inode->i_uid, inode->i_mode }; 414b5e95b48SJohn Johansen 415aebd873eSJohn Johansen error = aa_path_perm(OP_OPEN, label, &file->f_path, 0, 416b5e95b48SJohn Johansen aa_map_file_to_perms(file), &cond); 417b5e95b48SJohn Johansen /* todo cache full allowed permissions set and state */ 41855a26ebfSJohn Johansen fctx->allow = aa_map_file_to_perms(file); 419b5e95b48SJohn Johansen } 420637f688dSJohn Johansen aa_put_label(label); 421b5e95b48SJohn Johansen 422b5e95b48SJohn Johansen return error; 423b5e95b48SJohn Johansen } 424b5e95b48SJohn Johansen 425b5e95b48SJohn Johansen static int apparmor_file_alloc_security(struct file *file) 426b5e95b48SJohn Johansen { 427cf797c0eSJohn Johansen int error = 0; 428cf797c0eSJohn Johansen 429b5e95b48SJohn Johansen /* freed by apparmor_file_free_security */ 430637f688dSJohn Johansen struct aa_label *label = begin_current_label_crit_section(); 431190a9518SJohn Johansen file->f_security = aa_alloc_file_ctx(label, GFP_KERNEL); 4322835a13bSJohn Johansen if (!file_ctx(file)) 4332835a13bSJohn Johansen error = -ENOMEM; 434637f688dSJohn Johansen end_current_label_crit_section(label); 435b5e95b48SJohn Johansen 436cf797c0eSJohn Johansen return error; 437b5e95b48SJohn Johansen } 438b5e95b48SJohn Johansen 439b5e95b48SJohn Johansen static void apparmor_file_free_security(struct file *file) 440b5e95b48SJohn Johansen { 4412835a13bSJohn Johansen aa_free_file_ctx(file_ctx(file)); 442b5e95b48SJohn Johansen } 443b5e95b48SJohn Johansen 44447f6e5ccSJohn Johansen static int common_file_perm(const char *op, struct file *file, u32 mask) 445b5e95b48SJohn Johansen { 446190a9518SJohn Johansen struct aa_label *label; 447b5e95b48SJohn Johansen int error = 0; 448b5e95b48SJohn Johansen 449192ca6b5SJohn Johansen /* don't reaudit files closed during inheritance */ 450192ca6b5SJohn Johansen if (file->f_path.dentry == aa_null.dentry) 451192ca6b5SJohn Johansen return -EACCES; 452192ca6b5SJohn Johansen 453637f688dSJohn Johansen label = __begin_current_label_crit_section(); 454190a9518SJohn Johansen error = aa_file_perm(op, label, file, mask); 455637f688dSJohn Johansen __end_current_label_crit_section(label); 456b5e95b48SJohn Johansen 457b5e95b48SJohn Johansen return error; 458b5e95b48SJohn Johansen } 459b5e95b48SJohn Johansen 460064dc947SJohn Johansen static int apparmor_file_receive(struct file *file) 461064dc947SJohn Johansen { 462064dc947SJohn Johansen return common_file_perm(OP_FRECEIVE, file, aa_map_file_to_perms(file)); 463064dc947SJohn Johansen } 464064dc947SJohn Johansen 465b5e95b48SJohn Johansen static int apparmor_file_permission(struct file *file, int mask) 466b5e95b48SJohn Johansen { 467b5e95b48SJohn Johansen return common_file_perm(OP_FPERM, file, mask); 468b5e95b48SJohn Johansen } 469b5e95b48SJohn Johansen 470b5e95b48SJohn Johansen static int apparmor_file_lock(struct file *file, unsigned int cmd) 471b5e95b48SJohn Johansen { 472b5e95b48SJohn Johansen u32 mask = AA_MAY_LOCK; 473b5e95b48SJohn Johansen 474b5e95b48SJohn Johansen if (cmd == F_WRLCK) 475b5e95b48SJohn Johansen mask |= MAY_WRITE; 476b5e95b48SJohn Johansen 477b5e95b48SJohn Johansen return common_file_perm(OP_FLOCK, file, mask); 478b5e95b48SJohn Johansen } 479b5e95b48SJohn Johansen 48047f6e5ccSJohn Johansen static int common_mmap(const char *op, struct file *file, unsigned long prot, 481b5e95b48SJohn Johansen unsigned long flags) 482b5e95b48SJohn Johansen { 483b5e95b48SJohn Johansen int mask = 0; 484b5e95b48SJohn Johansen 485637f688dSJohn Johansen if (!file || !file_ctx(file)) 486b5e95b48SJohn Johansen return 0; 487b5e95b48SJohn Johansen 488b5e95b48SJohn Johansen if (prot & PROT_READ) 489b5e95b48SJohn Johansen mask |= MAY_READ; 490b5e95b48SJohn Johansen /* 491b5e95b48SJohn Johansen * Private mappings don't require write perms since they don't 492b5e95b48SJohn Johansen * write back to the files 493b5e95b48SJohn Johansen */ 494b5e95b48SJohn Johansen if ((prot & PROT_WRITE) && !(flags & MAP_PRIVATE)) 495b5e95b48SJohn Johansen mask |= MAY_WRITE; 496b5e95b48SJohn Johansen if (prot & PROT_EXEC) 497b5e95b48SJohn Johansen mask |= AA_EXEC_MMAP; 498b5e95b48SJohn Johansen 499b5e95b48SJohn Johansen return common_file_perm(op, file, mask); 500b5e95b48SJohn Johansen } 501b5e95b48SJohn Johansen 502e5467859SAl Viro static int apparmor_mmap_file(struct file *file, unsigned long reqprot, 503e5467859SAl Viro unsigned long prot, unsigned long flags) 504b5e95b48SJohn Johansen { 505b5e95b48SJohn Johansen return common_mmap(OP_FMMAP, file, prot, flags); 506b5e95b48SJohn Johansen } 507b5e95b48SJohn Johansen 508b5e95b48SJohn Johansen static int apparmor_file_mprotect(struct vm_area_struct *vma, 509b5e95b48SJohn Johansen unsigned long reqprot, unsigned long prot) 510b5e95b48SJohn Johansen { 511b5e95b48SJohn Johansen return common_mmap(OP_FMPROT, vma->vm_file, prot, 512b5e95b48SJohn Johansen !(vma->vm_flags & VM_SHARED) ? MAP_PRIVATE : 0); 513b5e95b48SJohn Johansen } 514b5e95b48SJohn Johansen 5152ea3ffb7SJohn Johansen static int apparmor_sb_mount(const char *dev_name, const struct path *path, 5162ea3ffb7SJohn Johansen const char *type, unsigned long flags, void *data) 5172ea3ffb7SJohn Johansen { 5182ea3ffb7SJohn Johansen struct aa_label *label; 5192ea3ffb7SJohn Johansen int error = 0; 5202ea3ffb7SJohn Johansen 5212ea3ffb7SJohn Johansen /* Discard magic */ 5222ea3ffb7SJohn Johansen if ((flags & MS_MGC_MSK) == MS_MGC_VAL) 5232ea3ffb7SJohn Johansen flags &= ~MS_MGC_MSK; 5242ea3ffb7SJohn Johansen 5252ea3ffb7SJohn Johansen flags &= ~AA_MS_IGNORE_MASK; 5262ea3ffb7SJohn Johansen 5272ea3ffb7SJohn Johansen label = __begin_current_label_crit_section(); 5282ea3ffb7SJohn Johansen if (!unconfined(label)) { 5292ea3ffb7SJohn Johansen if (flags & MS_REMOUNT) 5302ea3ffb7SJohn Johansen error = aa_remount(label, path, flags, data); 5312ea3ffb7SJohn Johansen else if (flags & MS_BIND) 5322ea3ffb7SJohn Johansen error = aa_bind_mount(label, path, dev_name, flags); 5332ea3ffb7SJohn Johansen else if (flags & (MS_SHARED | MS_PRIVATE | MS_SLAVE | 5342ea3ffb7SJohn Johansen MS_UNBINDABLE)) 5352ea3ffb7SJohn Johansen error = aa_mount_change_type(label, path, flags); 5362ea3ffb7SJohn Johansen else if (flags & MS_MOVE) 5372ea3ffb7SJohn Johansen error = aa_move_mount(label, path, dev_name); 5382ea3ffb7SJohn Johansen else 5392ea3ffb7SJohn Johansen error = aa_new_mount(label, dev_name, path, type, 5402ea3ffb7SJohn Johansen flags, data); 5412ea3ffb7SJohn Johansen } 5422ea3ffb7SJohn Johansen __end_current_label_crit_section(label); 5432ea3ffb7SJohn Johansen 5442ea3ffb7SJohn Johansen return error; 5452ea3ffb7SJohn Johansen } 5462ea3ffb7SJohn Johansen 5472ea3ffb7SJohn Johansen static int apparmor_sb_umount(struct vfsmount *mnt, int flags) 5482ea3ffb7SJohn Johansen { 5492ea3ffb7SJohn Johansen struct aa_label *label; 5502ea3ffb7SJohn Johansen int error = 0; 5512ea3ffb7SJohn Johansen 5522ea3ffb7SJohn Johansen label = __begin_current_label_crit_section(); 5532ea3ffb7SJohn Johansen if (!unconfined(label)) 5542ea3ffb7SJohn Johansen error = aa_umount(label, mnt, flags); 5552ea3ffb7SJohn Johansen __end_current_label_crit_section(label); 5562ea3ffb7SJohn Johansen 5572ea3ffb7SJohn Johansen return error; 5582ea3ffb7SJohn Johansen } 5592ea3ffb7SJohn Johansen 5602ea3ffb7SJohn Johansen static int apparmor_sb_pivotroot(const struct path *old_path, 5612ea3ffb7SJohn Johansen const struct path *new_path) 5622ea3ffb7SJohn Johansen { 5632ea3ffb7SJohn Johansen struct aa_label *label; 5642ea3ffb7SJohn Johansen int error = 0; 5652ea3ffb7SJohn Johansen 5662ea3ffb7SJohn Johansen label = aa_get_current_label(); 5672ea3ffb7SJohn Johansen if (!unconfined(label)) 5682ea3ffb7SJohn Johansen error = aa_pivotroot(label, old_path, new_path); 5692ea3ffb7SJohn Johansen aa_put_label(label); 5702ea3ffb7SJohn Johansen 5712ea3ffb7SJohn Johansen return error; 5722ea3ffb7SJohn Johansen } 5732ea3ffb7SJohn Johansen 574b5e95b48SJohn Johansen static int apparmor_getprocattr(struct task_struct *task, char *name, 575b5e95b48SJohn Johansen char **value) 576b5e95b48SJohn Johansen { 577b5e95b48SJohn Johansen int error = -ENOENT; 578b5e95b48SJohn Johansen /* released below */ 579b5e95b48SJohn Johansen const struct cred *cred = get_task_cred(task); 58055a26ebfSJohn Johansen struct aa_task_ctx *ctx = cred_ctx(cred); 581637f688dSJohn Johansen struct aa_label *label = NULL; 582b5e95b48SJohn Johansen 583b5e95b48SJohn Johansen if (strcmp(name, "current") == 0) 584637f688dSJohn Johansen label = aa_get_newest_label(ctx->label); 58555a26ebfSJohn Johansen else if (strcmp(name, "prev") == 0 && ctx->previous) 586637f688dSJohn Johansen label = aa_get_newest_label(ctx->previous); 58755a26ebfSJohn Johansen else if (strcmp(name, "exec") == 0 && ctx->onexec) 588637f688dSJohn Johansen label = aa_get_newest_label(ctx->onexec); 589b5e95b48SJohn Johansen else 590b5e95b48SJohn Johansen error = -EINVAL; 591b5e95b48SJohn Johansen 592637f688dSJohn Johansen if (label) 59376a1d263SJohn Johansen error = aa_getprocattr(label, value); 59477b071b3SJohn Johansen 595637f688dSJohn Johansen aa_put_label(label); 596b5e95b48SJohn Johansen put_cred(cred); 597b5e95b48SJohn Johansen 598b5e95b48SJohn Johansen return error; 599b5e95b48SJohn Johansen } 600b5e95b48SJohn Johansen 601b21507e2SStephen Smalley static int apparmor_setprocattr(const char *name, void *value, 602b21507e2SStephen Smalley size_t size) 603b5e95b48SJohn Johansen { 604e89b8081SVegard Nossum char *command, *largs = NULL, *args = value; 605b5e95b48SJohn Johansen size_t arg_size; 606b5e95b48SJohn Johansen int error; 607ef88a7acSJohn Johansen DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_NONE, OP_SETPROCATTR); 608b5e95b48SJohn Johansen 609b5e95b48SJohn Johansen if (size == 0) 610b5e95b48SJohn Johansen return -EINVAL; 611b5e95b48SJohn Johansen 612e89b8081SVegard Nossum /* AppArmor requires that the buffer must be null terminated atm */ 613e89b8081SVegard Nossum if (args[size - 1] != '\0') { 614e89b8081SVegard Nossum /* null terminate */ 615e89b8081SVegard Nossum largs = args = kmalloc(size + 1, GFP_KERNEL); 616e89b8081SVegard Nossum if (!args) 617e89b8081SVegard Nossum return -ENOMEM; 618e89b8081SVegard Nossum memcpy(args, value, size); 619e89b8081SVegard Nossum args[size] = '\0'; 620e89b8081SVegard Nossum } 621e89b8081SVegard Nossum 622e89b8081SVegard Nossum error = -EINVAL; 623b5e95b48SJohn Johansen args = strim(args); 624b5e95b48SJohn Johansen command = strsep(&args, " "); 625b5e95b48SJohn Johansen if (!args) 626e89b8081SVegard Nossum goto out; 627b5e95b48SJohn Johansen args = skip_spaces(args); 628b5e95b48SJohn Johansen if (!*args) 629e89b8081SVegard Nossum goto out; 630b5e95b48SJohn Johansen 631d4d03f74SJohn Johansen arg_size = size - (args - (largs ? largs : (char *) value)); 632b5e95b48SJohn Johansen if (strcmp(name, "current") == 0) { 633b5e95b48SJohn Johansen if (strcmp(command, "changehat") == 0) { 634b5e95b48SJohn Johansen error = aa_setprocattr_changehat(args, arg_size, 635df8073c6SJohn Johansen AA_CHANGE_NOFLAGS); 636b5e95b48SJohn Johansen } else if (strcmp(command, "permhat") == 0) { 637b5e95b48SJohn Johansen error = aa_setprocattr_changehat(args, arg_size, 638df8073c6SJohn Johansen AA_CHANGE_TEST); 639b5e95b48SJohn Johansen } else if (strcmp(command, "changeprofile") == 0) { 640df8073c6SJohn Johansen error = aa_change_profile(args, AA_CHANGE_NOFLAGS); 641b5e95b48SJohn Johansen } else if (strcmp(command, "permprofile") == 0) { 642df8073c6SJohn Johansen error = aa_change_profile(args, AA_CHANGE_TEST); 6436c5fc8f1SJohn Johansen } else if (strcmp(command, "stack") == 0) { 6446c5fc8f1SJohn Johansen error = aa_change_profile(args, AA_CHANGE_STACK); 6453eea57c2SJohn Johansen } else 6463eea57c2SJohn Johansen goto fail; 647b5e95b48SJohn Johansen } else if (strcmp(name, "exec") == 0) { 6483eea57c2SJohn Johansen if (strcmp(command, "exec") == 0) 649df8073c6SJohn Johansen error = aa_change_profile(args, AA_CHANGE_ONEXEC); 6506c5fc8f1SJohn Johansen else if (strcmp(command, "stack") == 0) 6516c5fc8f1SJohn Johansen error = aa_change_profile(args, (AA_CHANGE_ONEXEC | 6526c5fc8f1SJohn Johansen AA_CHANGE_STACK)); 6533eea57c2SJohn Johansen else 6543eea57c2SJohn Johansen goto fail; 6553eea57c2SJohn Johansen } else 656b5e95b48SJohn Johansen /* only support the "current" and "exec" process attributes */ 657e89b8081SVegard Nossum goto fail; 6583eea57c2SJohn Johansen 659b5e95b48SJohn Johansen if (!error) 660b5e95b48SJohn Johansen error = size; 661e89b8081SVegard Nossum out: 662e89b8081SVegard Nossum kfree(largs); 663b5e95b48SJohn Johansen return error; 6643eea57c2SJohn Johansen 6653eea57c2SJohn Johansen fail: 666637f688dSJohn Johansen aad(&sa)->label = begin_current_label_crit_section(); 667ef88a7acSJohn Johansen aad(&sa)->info = name; 668ef88a7acSJohn Johansen aad(&sa)->error = error = -EINVAL; 6693eea57c2SJohn Johansen aa_audit_msg(AUDIT_APPARMOR_DENIED, &sa, NULL); 670637f688dSJohn Johansen end_current_label_crit_section(aad(&sa)->label); 671e89b8081SVegard Nossum goto out; 672b5e95b48SJohn Johansen } 673b5e95b48SJohn Johansen 674fe864821SJohn Johansen /** 675fe864821SJohn Johansen * apparmor_bprm_committing_creds - do task cleanup on committing new creds 676fe864821SJohn Johansen * @bprm: binprm for the exec (NOT NULL) 677fe864821SJohn Johansen */ 678fe864821SJohn Johansen static void apparmor_bprm_committing_creds(struct linux_binprm *bprm) 679fe864821SJohn Johansen { 680637f688dSJohn Johansen struct aa_label *label = aa_current_raw_label(); 681fe864821SJohn Johansen struct aa_task_ctx *new_ctx = cred_ctx(bprm->cred); 682fe864821SJohn Johansen 683fe864821SJohn Johansen /* bail out if unconfined or not changing profile */ 684637f688dSJohn Johansen if ((new_ctx->label->proxy == label->proxy) || 685637f688dSJohn Johansen (unconfined(new_ctx->label))) 686fe864821SJohn Johansen return; 687fe864821SJohn Johansen 688192ca6b5SJohn Johansen aa_inherit_files(bprm->cred, current->files); 689192ca6b5SJohn Johansen 690fe864821SJohn Johansen current->pdeath_signal = 0; 691fe864821SJohn Johansen 692637f688dSJohn Johansen /* reset soft limits and set hard limits for the new label */ 69386b92cb7SJohn Johansen __aa_transition_rlimits(label, new_ctx->label); 694fe864821SJohn Johansen } 695fe864821SJohn Johansen 696fe864821SJohn Johansen /** 697fe864821SJohn Johansen * apparmor_bprm_committed_cred - do cleanup after new creds committed 698fe864821SJohn Johansen * @bprm: binprm for the exec (NOT NULL) 699fe864821SJohn Johansen */ 700fe864821SJohn Johansen static void apparmor_bprm_committed_creds(struct linux_binprm *bprm) 701fe864821SJohn Johansen { 702fe864821SJohn Johansen /* TODO: cleanup signals - ipc mediation */ 703fe864821SJohn Johansen return; 704fe864821SJohn Johansen } 705fe864821SJohn Johansen 7067cb4dc9fSJiri Slaby static int apparmor_task_setrlimit(struct task_struct *task, 7077cb4dc9fSJiri Slaby unsigned int resource, struct rlimit *new_rlim) 708b5e95b48SJohn Johansen { 709637f688dSJohn Johansen struct aa_label *label = __begin_current_label_crit_section(); 710b5e95b48SJohn Johansen int error = 0; 711b5e95b48SJohn Johansen 712637f688dSJohn Johansen if (!unconfined(label)) 71386b92cb7SJohn Johansen error = aa_task_setrlimit(label, task, resource, new_rlim); 714637f688dSJohn Johansen __end_current_label_crit_section(label); 715b5e95b48SJohn Johansen 716b5e95b48SJohn Johansen return error; 717b5e95b48SJohn Johansen } 718b5e95b48SJohn Johansen 719cd1dbf76SJohn Johansen static int apparmor_task_kill(struct task_struct *target, struct siginfo *info, 720cd1dbf76SJohn Johansen int sig, u32 secid) 721cd1dbf76SJohn Johansen { 722cd1dbf76SJohn Johansen struct aa_label *cl, *tl; 723cd1dbf76SJohn Johansen int error; 724cd1dbf76SJohn Johansen 725cd1dbf76SJohn Johansen if (secid) 726cd1dbf76SJohn Johansen /* TODO: after secid to label mapping is done. 727cd1dbf76SJohn Johansen * Dealing with USB IO specific behavior 728cd1dbf76SJohn Johansen */ 729cd1dbf76SJohn Johansen return 0; 730cd1dbf76SJohn Johansen cl = __begin_current_label_crit_section(); 731cd1dbf76SJohn Johansen tl = aa_get_task_label(target); 732cd1dbf76SJohn Johansen error = aa_may_signal(cl, tl, sig); 733cd1dbf76SJohn Johansen aa_put_label(tl); 734cd1dbf76SJohn Johansen __end_current_label_crit_section(cl); 735cd1dbf76SJohn Johansen 736cd1dbf76SJohn Johansen return error; 737cd1dbf76SJohn Johansen } 738cd1dbf76SJohn Johansen 739ca97d939SJames Morris static struct security_hook_list apparmor_hooks[] __lsm_ro_after_init = { 740e20b043aSCasey Schaufler LSM_HOOK_INIT(ptrace_access_check, apparmor_ptrace_access_check), 741e20b043aSCasey Schaufler LSM_HOOK_INIT(ptrace_traceme, apparmor_ptrace_traceme), 742e20b043aSCasey Schaufler LSM_HOOK_INIT(capget, apparmor_capget), 743e20b043aSCasey Schaufler LSM_HOOK_INIT(capable, apparmor_capable), 744b5e95b48SJohn Johansen 7452ea3ffb7SJohn Johansen LSM_HOOK_INIT(sb_mount, apparmor_sb_mount), 7462ea3ffb7SJohn Johansen LSM_HOOK_INIT(sb_umount, apparmor_sb_umount), 7472ea3ffb7SJohn Johansen LSM_HOOK_INIT(sb_pivotroot, apparmor_sb_pivotroot), 7482ea3ffb7SJohn Johansen 749e20b043aSCasey Schaufler LSM_HOOK_INIT(path_link, apparmor_path_link), 750e20b043aSCasey Schaufler LSM_HOOK_INIT(path_unlink, apparmor_path_unlink), 751e20b043aSCasey Schaufler LSM_HOOK_INIT(path_symlink, apparmor_path_symlink), 752e20b043aSCasey Schaufler LSM_HOOK_INIT(path_mkdir, apparmor_path_mkdir), 753e20b043aSCasey Schaufler LSM_HOOK_INIT(path_rmdir, apparmor_path_rmdir), 754e20b043aSCasey Schaufler LSM_HOOK_INIT(path_mknod, apparmor_path_mknod), 755e20b043aSCasey Schaufler LSM_HOOK_INIT(path_rename, apparmor_path_rename), 756e20b043aSCasey Schaufler LSM_HOOK_INIT(path_chmod, apparmor_path_chmod), 757e20b043aSCasey Schaufler LSM_HOOK_INIT(path_chown, apparmor_path_chown), 758e20b043aSCasey Schaufler LSM_HOOK_INIT(path_truncate, apparmor_path_truncate), 759e20b043aSCasey Schaufler LSM_HOOK_INIT(inode_getattr, apparmor_inode_getattr), 760b5e95b48SJohn Johansen 761e20b043aSCasey Schaufler LSM_HOOK_INIT(file_open, apparmor_file_open), 762064dc947SJohn Johansen LSM_HOOK_INIT(file_receive, apparmor_file_receive), 763e20b043aSCasey Schaufler LSM_HOOK_INIT(file_permission, apparmor_file_permission), 764e20b043aSCasey Schaufler LSM_HOOK_INIT(file_alloc_security, apparmor_file_alloc_security), 765e20b043aSCasey Schaufler LSM_HOOK_INIT(file_free_security, apparmor_file_free_security), 766e20b043aSCasey Schaufler LSM_HOOK_INIT(mmap_file, apparmor_mmap_file), 767e20b043aSCasey Schaufler LSM_HOOK_INIT(file_mprotect, apparmor_file_mprotect), 768e20b043aSCasey Schaufler LSM_HOOK_INIT(file_lock, apparmor_file_lock), 769b5e95b48SJohn Johansen 770e20b043aSCasey Schaufler LSM_HOOK_INIT(getprocattr, apparmor_getprocattr), 771e20b043aSCasey Schaufler LSM_HOOK_INIT(setprocattr, apparmor_setprocattr), 772b5e95b48SJohn Johansen 773e20b043aSCasey Schaufler LSM_HOOK_INIT(cred_alloc_blank, apparmor_cred_alloc_blank), 774e20b043aSCasey Schaufler LSM_HOOK_INIT(cred_free, apparmor_cred_free), 775e20b043aSCasey Schaufler LSM_HOOK_INIT(cred_prepare, apparmor_cred_prepare), 776e20b043aSCasey Schaufler LSM_HOOK_INIT(cred_transfer, apparmor_cred_transfer), 777b5e95b48SJohn Johansen 778e20b043aSCasey Schaufler LSM_HOOK_INIT(bprm_set_creds, apparmor_bprm_set_creds), 779e20b043aSCasey Schaufler LSM_HOOK_INIT(bprm_committing_creds, apparmor_bprm_committing_creds), 780e20b043aSCasey Schaufler LSM_HOOK_INIT(bprm_committed_creds, apparmor_bprm_committed_creds), 781b5e95b48SJohn Johansen 782e20b043aSCasey Schaufler LSM_HOOK_INIT(task_setrlimit, apparmor_task_setrlimit), 783cd1dbf76SJohn Johansen LSM_HOOK_INIT(task_kill, apparmor_task_kill), 784b5e95b48SJohn Johansen }; 785b5e95b48SJohn Johansen 786b5e95b48SJohn Johansen /* 787b5e95b48SJohn Johansen * AppArmor sysfs module parameters 788b5e95b48SJohn Johansen */ 789b5e95b48SJohn Johansen 790101d6c82SStephen Rothwell static int param_set_aabool(const char *val, const struct kernel_param *kp); 791101d6c82SStephen Rothwell static int param_get_aabool(char *buffer, const struct kernel_param *kp); 792b8aa09fdSRusty Russell #define param_check_aabool param_check_bool 7939c27847dSLuis R. Rodriguez static const struct kernel_param_ops param_ops_aabool = { 7946a4c2643SJani Nikula .flags = KERNEL_PARAM_OPS_FL_NOARG, 795101d6c82SStephen Rothwell .set = param_set_aabool, 796101d6c82SStephen Rothwell .get = param_get_aabool 797101d6c82SStephen Rothwell }; 798b5e95b48SJohn Johansen 799101d6c82SStephen Rothwell static int param_set_aauint(const char *val, const struct kernel_param *kp); 800101d6c82SStephen Rothwell static int param_get_aauint(char *buffer, const struct kernel_param *kp); 801b8aa09fdSRusty Russell #define param_check_aauint param_check_uint 8029c27847dSLuis R. Rodriguez static const struct kernel_param_ops param_ops_aauint = { 803101d6c82SStephen Rothwell .set = param_set_aauint, 804101d6c82SStephen Rothwell .get = param_get_aauint 805101d6c82SStephen Rothwell }; 806b5e95b48SJohn Johansen 807101d6c82SStephen Rothwell static int param_set_aalockpolicy(const char *val, const struct kernel_param *kp); 808101d6c82SStephen Rothwell static int param_get_aalockpolicy(char *buffer, const struct kernel_param *kp); 809b8aa09fdSRusty Russell #define param_check_aalockpolicy param_check_bool 8109c27847dSLuis R. Rodriguez static const struct kernel_param_ops param_ops_aalockpolicy = { 8116a4c2643SJani Nikula .flags = KERNEL_PARAM_OPS_FL_NOARG, 812101d6c82SStephen Rothwell .set = param_set_aalockpolicy, 813101d6c82SStephen Rothwell .get = param_get_aalockpolicy 814101d6c82SStephen Rothwell }; 815b5e95b48SJohn Johansen 816b5e95b48SJohn Johansen static int param_set_audit(const char *val, struct kernel_param *kp); 817b5e95b48SJohn Johansen static int param_get_audit(char *buffer, struct kernel_param *kp); 818b5e95b48SJohn Johansen 819b5e95b48SJohn Johansen static int param_set_mode(const char *val, struct kernel_param *kp); 820b5e95b48SJohn Johansen static int param_get_mode(char *buffer, struct kernel_param *kp); 821b5e95b48SJohn Johansen 822b5e95b48SJohn Johansen /* Flag values, also controllable via /sys/module/apparmor/parameters 823b5e95b48SJohn Johansen * We define special types as we want to do additional mediation. 824b5e95b48SJohn Johansen */ 825b5e95b48SJohn Johansen 826b5e95b48SJohn Johansen /* AppArmor global enforcement switch - complain, enforce, kill */ 827b5e95b48SJohn Johansen enum profile_mode aa_g_profile_mode = APPARMOR_ENFORCE; 828b5e95b48SJohn Johansen module_param_call(mode, param_set_mode, param_get_mode, 829b5e95b48SJohn Johansen &aa_g_profile_mode, S_IRUSR | S_IWUSR); 830b5e95b48SJohn Johansen 8316059f71fSJohn Johansen /* whether policy verification hashing is enabled */ 8327616ac70SArnd Bergmann bool aa_g_hash_policy = IS_ENABLED(CONFIG_SECURITY_APPARMOR_HASH_DEFAULT); 8333ccb76c5SJohn Johansen #ifdef CONFIG_SECURITY_APPARMOR_HASH 8346059f71fSJohn Johansen module_param_named(hash_policy, aa_g_hash_policy, aabool, S_IRUSR | S_IWUSR); 8357616ac70SArnd Bergmann #endif 8366059f71fSJohn Johansen 837b5e95b48SJohn Johansen /* Debug mode */ 838eea7a05fSValentin Rothberg bool aa_g_debug = IS_ENABLED(CONFIG_SECURITY_APPARMOR_DEBUG_MESSAGES); 839b5e95b48SJohn Johansen module_param_named(debug, aa_g_debug, aabool, S_IRUSR | S_IWUSR); 840b5e95b48SJohn Johansen 841b5e95b48SJohn Johansen /* Audit mode */ 842b5e95b48SJohn Johansen enum audit_mode aa_g_audit; 843b5e95b48SJohn Johansen module_param_call(audit, param_set_audit, param_get_audit, 844b5e95b48SJohn Johansen &aa_g_audit, S_IRUSR | S_IWUSR); 845b5e95b48SJohn Johansen 846b5e95b48SJohn Johansen /* Determines if audit header is included in audited messages. This 847b5e95b48SJohn Johansen * provides more context if the audit daemon is not running 848b5e95b48SJohn Johansen */ 849*954317feSThomas Meyer bool aa_g_audit_header = true; 850b5e95b48SJohn Johansen module_param_named(audit_header, aa_g_audit_header, aabool, 851b5e95b48SJohn Johansen S_IRUSR | S_IWUSR); 852b5e95b48SJohn Johansen 853b5e95b48SJohn Johansen /* lock out loading/removal of policy 854b5e95b48SJohn Johansen * TODO: add in at boot loading of policy, which is the only way to 855b5e95b48SJohn Johansen * load policy, if lock_policy is set 856b5e95b48SJohn Johansen */ 85790ab5ee9SRusty Russell bool aa_g_lock_policy; 858b5e95b48SJohn Johansen module_param_named(lock_policy, aa_g_lock_policy, aalockpolicy, 859b5e95b48SJohn Johansen S_IRUSR | S_IWUSR); 860b5e95b48SJohn Johansen 861b5e95b48SJohn Johansen /* Syscall logging mode */ 86290ab5ee9SRusty Russell bool aa_g_logsyscall; 863b5e95b48SJohn Johansen module_param_named(logsyscall, aa_g_logsyscall, aabool, S_IRUSR | S_IWUSR); 864b5e95b48SJohn Johansen 865b5e95b48SJohn Johansen /* Maximum pathname length before accesses will start getting rejected */ 866b5e95b48SJohn Johansen unsigned int aa_g_path_max = 2 * PATH_MAX; 867622f6e32SJohn Johansen module_param_named(path_max, aa_g_path_max, aauint, S_IRUSR); 868b5e95b48SJohn Johansen 869b5e95b48SJohn Johansen /* Determines how paranoid loading of policy is and how much verification 870b5e95b48SJohn Johansen * on the loaded policy is done. 871abbf8734SJohn Johansen * DEPRECATED: read only as strict checking of load is always done now 872abbf8734SJohn Johansen * that none root users (user namespaces) can load policy. 873b5e95b48SJohn Johansen */ 874*954317feSThomas Meyer bool aa_g_paranoid_load = true; 875abbf8734SJohn Johansen module_param_named(paranoid_load, aa_g_paranoid_load, aabool, S_IRUGO); 876b5e95b48SJohn Johansen 877b5e95b48SJohn Johansen /* Boot time disable flag */ 87890ab5ee9SRusty Russell static bool apparmor_enabled = CONFIG_SECURITY_APPARMOR_BOOTPARAM_VALUE; 879c611616cSJohn Johansen module_param_named(enabled, apparmor_enabled, bool, S_IRUGO); 880b5e95b48SJohn Johansen 881b5e95b48SJohn Johansen static int __init apparmor_enabled_setup(char *str) 882b5e95b48SJohn Johansen { 883b5e95b48SJohn Johansen unsigned long enabled; 88429707b20SJingoo Han int error = kstrtoul(str, 0, &enabled); 885b5e95b48SJohn Johansen if (!error) 886b5e95b48SJohn Johansen apparmor_enabled = enabled ? 1 : 0; 887b5e95b48SJohn Johansen return 1; 888b5e95b48SJohn Johansen } 889b5e95b48SJohn Johansen 890b5e95b48SJohn Johansen __setup("apparmor=", apparmor_enabled_setup); 891b5e95b48SJohn Johansen 892b5e95b48SJohn Johansen /* set global flag turning off the ability to load policy */ 893101d6c82SStephen Rothwell static int param_set_aalockpolicy(const char *val, const struct kernel_param *kp) 894b5e95b48SJohn Johansen { 895545de8feSJohn Johansen if (!apparmor_enabled) 896545de8feSJohn Johansen return -EINVAL; 897545de8feSJohn Johansen if (apparmor_initialized && !policy_admin_capable(NULL)) 898b5e95b48SJohn Johansen return -EPERM; 899b5e95b48SJohn Johansen return param_set_bool(val, kp); 900b5e95b48SJohn Johansen } 901b5e95b48SJohn Johansen 902101d6c82SStephen Rothwell static int param_get_aalockpolicy(char *buffer, const struct kernel_param *kp) 903b5e95b48SJohn Johansen { 904ca4bd5aeSJohn Johansen if (!apparmor_enabled) 905ca4bd5aeSJohn Johansen return -EINVAL; 906545de8feSJohn Johansen if (apparmor_initialized && !policy_view_capable(NULL)) 907545de8feSJohn Johansen return -EPERM; 908b5e95b48SJohn Johansen return param_get_bool(buffer, kp); 909b5e95b48SJohn Johansen } 910b5e95b48SJohn Johansen 911101d6c82SStephen Rothwell static int param_set_aabool(const char *val, const struct kernel_param *kp) 912b5e95b48SJohn Johansen { 913ca4bd5aeSJohn Johansen if (!apparmor_enabled) 914ca4bd5aeSJohn Johansen return -EINVAL; 915545de8feSJohn Johansen if (apparmor_initialized && !policy_admin_capable(NULL)) 916545de8feSJohn Johansen return -EPERM; 917b5e95b48SJohn Johansen return param_set_bool(val, kp); 918b5e95b48SJohn Johansen } 919b5e95b48SJohn Johansen 920101d6c82SStephen Rothwell static int param_get_aabool(char *buffer, const struct kernel_param *kp) 921b5e95b48SJohn Johansen { 922ca4bd5aeSJohn Johansen if (!apparmor_enabled) 923ca4bd5aeSJohn Johansen return -EINVAL; 924545de8feSJohn Johansen if (apparmor_initialized && !policy_view_capable(NULL)) 925545de8feSJohn Johansen return -EPERM; 926b5e95b48SJohn Johansen return param_get_bool(buffer, kp); 927b5e95b48SJohn Johansen } 928b5e95b48SJohn Johansen 929101d6c82SStephen Rothwell static int param_set_aauint(const char *val, const struct kernel_param *kp) 930b5e95b48SJohn Johansen { 93139d84824SJohn Johansen int error; 93239d84824SJohn Johansen 933ca4bd5aeSJohn Johansen if (!apparmor_enabled) 934ca4bd5aeSJohn Johansen return -EINVAL; 93539d84824SJohn Johansen /* file is ro but enforce 2nd line check */ 93639d84824SJohn Johansen if (apparmor_initialized) 937545de8feSJohn Johansen return -EPERM; 93839d84824SJohn Johansen 93939d84824SJohn Johansen error = param_set_uint(val, kp); 94039d84824SJohn Johansen pr_info("AppArmor: buffer size set to %d bytes\n", aa_g_path_max); 94139d84824SJohn Johansen 94239d84824SJohn Johansen return error; 943b5e95b48SJohn Johansen } 944b5e95b48SJohn Johansen 945101d6c82SStephen Rothwell static int param_get_aauint(char *buffer, const struct kernel_param *kp) 946b5e95b48SJohn Johansen { 947ca4bd5aeSJohn Johansen if (!apparmor_enabled) 948ca4bd5aeSJohn Johansen return -EINVAL; 949545de8feSJohn Johansen if (apparmor_initialized && !policy_view_capable(NULL)) 950545de8feSJohn Johansen return -EPERM; 951b5e95b48SJohn Johansen return param_get_uint(buffer, kp); 952b5e95b48SJohn Johansen } 953b5e95b48SJohn Johansen 954b5e95b48SJohn Johansen static int param_get_audit(char *buffer, struct kernel_param *kp) 955b5e95b48SJohn Johansen { 956b5e95b48SJohn Johansen if (!apparmor_enabled) 957b5e95b48SJohn Johansen return -EINVAL; 958545de8feSJohn Johansen if (apparmor_initialized && !policy_view_capable(NULL)) 959545de8feSJohn Johansen return -EPERM; 960b5e95b48SJohn Johansen return sprintf(buffer, "%s", audit_mode_names[aa_g_audit]); 961b5e95b48SJohn Johansen } 962b5e95b48SJohn Johansen 963b5e95b48SJohn Johansen static int param_set_audit(const char *val, struct kernel_param *kp) 964b5e95b48SJohn Johansen { 965b5e95b48SJohn Johansen int i; 966b5e95b48SJohn Johansen 967b5e95b48SJohn Johansen if (!apparmor_enabled) 968b5e95b48SJohn Johansen return -EINVAL; 969b5e95b48SJohn Johansen if (!val) 970b5e95b48SJohn Johansen return -EINVAL; 971545de8feSJohn Johansen if (apparmor_initialized && !policy_admin_capable(NULL)) 972545de8feSJohn Johansen return -EPERM; 973b5e95b48SJohn Johansen 974b5e95b48SJohn Johansen for (i = 0; i < AUDIT_MAX_INDEX; i++) { 975b5e95b48SJohn Johansen if (strcmp(val, audit_mode_names[i]) == 0) { 976b5e95b48SJohn Johansen aa_g_audit = i; 977b5e95b48SJohn Johansen return 0; 978b5e95b48SJohn Johansen } 979b5e95b48SJohn Johansen } 980b5e95b48SJohn Johansen 981b5e95b48SJohn Johansen return -EINVAL; 982b5e95b48SJohn Johansen } 983b5e95b48SJohn Johansen 984b5e95b48SJohn Johansen static int param_get_mode(char *buffer, struct kernel_param *kp) 985b5e95b48SJohn Johansen { 986b5e95b48SJohn Johansen if (!apparmor_enabled) 987b5e95b48SJohn Johansen return -EINVAL; 988545de8feSJohn Johansen if (apparmor_initialized && !policy_view_capable(NULL)) 989545de8feSJohn Johansen return -EPERM; 990b5e95b48SJohn Johansen 9910d259f04SJohn Johansen return sprintf(buffer, "%s", aa_profile_mode_names[aa_g_profile_mode]); 992b5e95b48SJohn Johansen } 993b5e95b48SJohn Johansen 994b5e95b48SJohn Johansen static int param_set_mode(const char *val, struct kernel_param *kp) 995b5e95b48SJohn Johansen { 996b5e95b48SJohn Johansen int i; 997b5e95b48SJohn Johansen 998b5e95b48SJohn Johansen if (!apparmor_enabled) 999b5e95b48SJohn Johansen return -EINVAL; 1000b5e95b48SJohn Johansen if (!val) 1001b5e95b48SJohn Johansen return -EINVAL; 1002545de8feSJohn Johansen if (apparmor_initialized && !policy_admin_capable(NULL)) 1003545de8feSJohn Johansen return -EPERM; 1004b5e95b48SJohn Johansen 10050d259f04SJohn Johansen for (i = 0; i < APPARMOR_MODE_NAMES_MAX_INDEX; i++) { 10060d259f04SJohn Johansen if (strcmp(val, aa_profile_mode_names[i]) == 0) { 1007b5e95b48SJohn Johansen aa_g_profile_mode = i; 1008b5e95b48SJohn Johansen return 0; 1009b5e95b48SJohn Johansen } 1010b5e95b48SJohn Johansen } 1011b5e95b48SJohn Johansen 1012b5e95b48SJohn Johansen return -EINVAL; 1013b5e95b48SJohn Johansen } 1014b5e95b48SJohn Johansen 1015b5e95b48SJohn Johansen /* 1016b5e95b48SJohn Johansen * AppArmor init functions 1017b5e95b48SJohn Johansen */ 1018b5e95b48SJohn Johansen 1019b5e95b48SJohn Johansen /** 102055a26ebfSJohn Johansen * set_init_ctx - set a task context and profile on the first task. 1021b5e95b48SJohn Johansen * 1022b5e95b48SJohn Johansen * TODO: allow setting an alternate profile than unconfined 1023b5e95b48SJohn Johansen */ 102455a26ebfSJohn Johansen static int __init set_init_ctx(void) 1025b5e95b48SJohn Johansen { 1026b5e95b48SJohn Johansen struct cred *cred = (struct cred *)current->real_cred; 102755a26ebfSJohn Johansen struct aa_task_ctx *ctx; 1028b5e95b48SJohn Johansen 102955a26ebfSJohn Johansen ctx = aa_alloc_task_context(GFP_KERNEL); 103055a26ebfSJohn Johansen if (!ctx) 1031b5e95b48SJohn Johansen return -ENOMEM; 1032b5e95b48SJohn Johansen 1033637f688dSJohn Johansen ctx->label = aa_get_label(ns_unconfined(root_ns)); 103455a26ebfSJohn Johansen cred_ctx(cred) = ctx; 1035b5e95b48SJohn Johansen 1036b5e95b48SJohn Johansen return 0; 1037b5e95b48SJohn Johansen } 1038b5e95b48SJohn Johansen 1039d4669f0bSJohn Johansen static void destroy_buffers(void) 1040d4669f0bSJohn Johansen { 1041d4669f0bSJohn Johansen u32 i, j; 1042d4669f0bSJohn Johansen 1043d4669f0bSJohn Johansen for_each_possible_cpu(i) { 1044d4669f0bSJohn Johansen for_each_cpu_buffer(j) { 1045d4669f0bSJohn Johansen kfree(per_cpu(aa_buffers, i).buf[j]); 1046d4669f0bSJohn Johansen per_cpu(aa_buffers, i).buf[j] = NULL; 1047d4669f0bSJohn Johansen } 1048d4669f0bSJohn Johansen } 1049d4669f0bSJohn Johansen } 1050d4669f0bSJohn Johansen 1051d4669f0bSJohn Johansen static int __init alloc_buffers(void) 1052d4669f0bSJohn Johansen { 1053d4669f0bSJohn Johansen u32 i, j; 1054d4669f0bSJohn Johansen 1055d4669f0bSJohn Johansen for_each_possible_cpu(i) { 1056d4669f0bSJohn Johansen for_each_cpu_buffer(j) { 1057d4669f0bSJohn Johansen char *buffer; 1058d4669f0bSJohn Johansen 1059d4669f0bSJohn Johansen if (cpu_to_node(i) > num_online_nodes()) 1060d4669f0bSJohn Johansen /* fallback to kmalloc for offline nodes */ 1061d4669f0bSJohn Johansen buffer = kmalloc(aa_g_path_max, GFP_KERNEL); 1062d4669f0bSJohn Johansen else 1063d4669f0bSJohn Johansen buffer = kmalloc_node(aa_g_path_max, GFP_KERNEL, 1064d4669f0bSJohn Johansen cpu_to_node(i)); 1065d4669f0bSJohn Johansen if (!buffer) { 1066d4669f0bSJohn Johansen destroy_buffers(); 1067d4669f0bSJohn Johansen return -ENOMEM; 1068d4669f0bSJohn Johansen } 1069d4669f0bSJohn Johansen per_cpu(aa_buffers, i).buf[j] = buffer; 1070d4669f0bSJohn Johansen } 1071d4669f0bSJohn Johansen } 1072d4669f0bSJohn Johansen 1073d4669f0bSJohn Johansen return 0; 1074d4669f0bSJohn Johansen } 1075d4669f0bSJohn Johansen 1076e3ea1ca5STyler Hicks #ifdef CONFIG_SYSCTL 1077e3ea1ca5STyler Hicks static int apparmor_dointvec(struct ctl_table *table, int write, 1078e3ea1ca5STyler Hicks void __user *buffer, size_t *lenp, loff_t *ppos) 1079e3ea1ca5STyler Hicks { 1080e3ea1ca5STyler Hicks if (!policy_admin_capable(NULL)) 1081e3ea1ca5STyler Hicks return -EPERM; 1082e3ea1ca5STyler Hicks if (!apparmor_enabled) 1083e3ea1ca5STyler Hicks return -EINVAL; 1084e3ea1ca5STyler Hicks 1085e3ea1ca5STyler Hicks return proc_dointvec(table, write, buffer, lenp, ppos); 1086e3ea1ca5STyler Hicks } 1087e3ea1ca5STyler Hicks 1088e3ea1ca5STyler Hicks static struct ctl_path apparmor_sysctl_path[] = { 1089e3ea1ca5STyler Hicks { .procname = "kernel", }, 1090e3ea1ca5STyler Hicks { } 1091e3ea1ca5STyler Hicks }; 1092e3ea1ca5STyler Hicks 1093e3ea1ca5STyler Hicks static struct ctl_table apparmor_sysctl_table[] = { 1094e3ea1ca5STyler Hicks { 1095e3ea1ca5STyler Hicks .procname = "unprivileged_userns_apparmor_policy", 1096e3ea1ca5STyler Hicks .data = &unprivileged_userns_apparmor_policy, 1097e3ea1ca5STyler Hicks .maxlen = sizeof(int), 1098e3ea1ca5STyler Hicks .mode = 0600, 1099e3ea1ca5STyler Hicks .proc_handler = apparmor_dointvec, 1100e3ea1ca5STyler Hicks }, 1101e3ea1ca5STyler Hicks { } 1102e3ea1ca5STyler Hicks }; 1103e3ea1ca5STyler Hicks 1104e3ea1ca5STyler Hicks static int __init apparmor_init_sysctl(void) 1105e3ea1ca5STyler Hicks { 1106e3ea1ca5STyler Hicks return register_sysctl_paths(apparmor_sysctl_path, 1107e3ea1ca5STyler Hicks apparmor_sysctl_table) ? 0 : -ENOMEM; 1108e3ea1ca5STyler Hicks } 1109e3ea1ca5STyler Hicks #else 1110e3ea1ca5STyler Hicks static inline int apparmor_init_sysctl(void) 1111e3ea1ca5STyler Hicks { 1112e3ea1ca5STyler Hicks return 0; 1113e3ea1ca5STyler Hicks } 1114e3ea1ca5STyler Hicks #endif /* CONFIG_SYSCTL */ 1115e3ea1ca5STyler Hicks 1116b5e95b48SJohn Johansen static int __init apparmor_init(void) 1117b5e95b48SJohn Johansen { 1118b5e95b48SJohn Johansen int error; 1119b5e95b48SJohn Johansen 1120b1d9e6b0SCasey Schaufler if (!apparmor_enabled || !security_module_enable("apparmor")) { 1121b5e95b48SJohn Johansen aa_info_message("AppArmor disabled by boot time parameter"); 1122*954317feSThomas Meyer apparmor_enabled = false; 1123b5e95b48SJohn Johansen return 0; 1124b5e95b48SJohn Johansen } 1125b5e95b48SJohn Johansen 112611c236b8SJohn Johansen error = aa_setup_dfa_engine(); 112711c236b8SJohn Johansen if (error) { 112811c236b8SJohn Johansen AA_ERROR("Unable to setup dfa engine\n"); 112911c236b8SJohn Johansen goto alloc_out; 113011c236b8SJohn Johansen } 113111c236b8SJohn Johansen 1132b5e95b48SJohn Johansen error = aa_alloc_root_ns(); 1133b5e95b48SJohn Johansen if (error) { 1134b5e95b48SJohn Johansen AA_ERROR("Unable to allocate default profile namespace\n"); 1135b5e95b48SJohn Johansen goto alloc_out; 1136b5e95b48SJohn Johansen } 1137b5e95b48SJohn Johansen 1138e3ea1ca5STyler Hicks error = apparmor_init_sysctl(); 1139e3ea1ca5STyler Hicks if (error) { 1140e3ea1ca5STyler Hicks AA_ERROR("Unable to register sysctls\n"); 1141e3ea1ca5STyler Hicks goto alloc_out; 1142e3ea1ca5STyler Hicks 1143e3ea1ca5STyler Hicks } 1144e3ea1ca5STyler Hicks 1145d4669f0bSJohn Johansen error = alloc_buffers(); 1146d4669f0bSJohn Johansen if (error) { 1147d4669f0bSJohn Johansen AA_ERROR("Unable to allocate work buffers\n"); 1148d4669f0bSJohn Johansen goto buffers_out; 1149d4669f0bSJohn Johansen } 1150d4669f0bSJohn Johansen 115155a26ebfSJohn Johansen error = set_init_ctx(); 1152b5e95b48SJohn Johansen if (error) { 1153b5e95b48SJohn Johansen AA_ERROR("Failed to set context on init task\n"); 1154b1d9e6b0SCasey Schaufler aa_free_root_ns(); 1155d4669f0bSJohn Johansen goto buffers_out; 1156b5e95b48SJohn Johansen } 1157d69dece5SCasey Schaufler security_add_hooks(apparmor_hooks, ARRAY_SIZE(apparmor_hooks), 1158d69dece5SCasey Schaufler "apparmor"); 1159b5e95b48SJohn Johansen 1160b5e95b48SJohn Johansen /* Report that AppArmor successfully initialized */ 1161b5e95b48SJohn Johansen apparmor_initialized = 1; 1162b5e95b48SJohn Johansen if (aa_g_profile_mode == APPARMOR_COMPLAIN) 1163b5e95b48SJohn Johansen aa_info_message("AppArmor initialized: complain mode enabled"); 1164b5e95b48SJohn Johansen else if (aa_g_profile_mode == APPARMOR_KILL) 1165b5e95b48SJohn Johansen aa_info_message("AppArmor initialized: kill mode enabled"); 1166b5e95b48SJohn Johansen else 1167b5e95b48SJohn Johansen aa_info_message("AppArmor initialized"); 1168b5e95b48SJohn Johansen 1169b5e95b48SJohn Johansen return error; 1170b5e95b48SJohn Johansen 1171d4669f0bSJohn Johansen buffers_out: 1172d4669f0bSJohn Johansen destroy_buffers(); 1173d4669f0bSJohn Johansen 1174b5e95b48SJohn Johansen alloc_out: 1175b5e95b48SJohn Johansen aa_destroy_aafs(); 117611c236b8SJohn Johansen aa_teardown_dfa_engine(); 1177b5e95b48SJohn Johansen 1178*954317feSThomas Meyer apparmor_enabled = false; 1179b5e95b48SJohn Johansen return error; 1180b5e95b48SJohn Johansen } 1181b5e95b48SJohn Johansen 1182b5e95b48SJohn Johansen security_initcall(apparmor_init); 1183