| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Security plug functions |
| * |
| * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com> |
| * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> |
| * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com> |
| * Copyright (C) 2016 Mellanox Technologies |
| */ |
| |
| #define pr_fmt(fmt) "LSM: " fmt |
| |
| #include <linux/bpf.h> |
| #include <linux/capability.h> |
| #include <linux/dcache.h> |
| #include <linux/export.h> |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/kernel_read_file.h> |
| #include <linux/lsm_hooks.h> |
| #include <linux/integrity.h> |
| #include <linux/ima.h> |
| #include <linux/evm.h> |
| #include <linux/fsnotify.h> |
| #include <linux/mman.h> |
| #include <linux/mount.h> |
| #include <linux/personality.h> |
| #include <linux/backing-dev.h> |
| #include <linux/string.h> |
| #include <linux/msg.h> |
| #include <net/flow.h> |
| |
| #define MAX_LSM_EVM_XATTR 2 |
| |
| /* How many LSMs were built into the kernel? */ |
| #define LSM_COUNT (__end_lsm_info - __start_lsm_info) |
| |
| /* |
| * These are descriptions of the reasons that can be passed to the |
| * security_locked_down() LSM hook. Placing this array here allows |
| * all security modules to use the same descriptions for auditing |
| * purposes. |
| */ |
| const char *const lockdown_reasons[LOCKDOWN_CONFIDENTIALITY_MAX+1] = { |
| [LOCKDOWN_NONE] = "none", |
| [LOCKDOWN_MODULE_SIGNATURE] = "unsigned module loading", |
| [LOCKDOWN_DEV_MEM] = "/dev/mem,kmem,port", |
| [LOCKDOWN_EFI_TEST] = "/dev/efi_test access", |
| [LOCKDOWN_KEXEC] = "kexec of unsigned images", |
| [LOCKDOWN_HIBERNATION] = "hibernation", |
| [LOCKDOWN_PCI_ACCESS] = "direct PCI access", |
| [LOCKDOWN_IOPORT] = "raw io port access", |
| [LOCKDOWN_MSR] = "raw MSR access", |
| [LOCKDOWN_ACPI_TABLES] = "modifying ACPI tables", |
| [LOCKDOWN_PCMCIA_CIS] = "direct PCMCIA CIS storage", |
| [LOCKDOWN_TIOCSSERIAL] = "reconfiguration of serial port IO", |
| [LOCKDOWN_MODULE_PARAMETERS] = "unsafe module parameters", |
| [LOCKDOWN_MMIOTRACE] = "unsafe mmio", |
| [LOCKDOWN_DEBUGFS] = "debugfs access", |
| [LOCKDOWN_XMON_WR] = "xmon write access", |
| [LOCKDOWN_BPF_WRITE_USER] = "use of bpf to write user RAM", |
| [LOCKDOWN_DBG_WRITE_KERNEL] = "use of kgdb/kdb to write kernel RAM", |
| [LOCKDOWN_INTEGRITY_MAX] = "integrity", |
| [LOCKDOWN_KCORE] = "/proc/kcore access", |
| [LOCKDOWN_KPROBES] = "use of kprobes", |
| [LOCKDOWN_BPF_READ_KERNEL] = "use of bpf to read kernel RAM", |
| [LOCKDOWN_DBG_READ_KERNEL] = "use of kgdb/kdb to read kernel RAM", |
| [LOCKDOWN_PERF] = "unsafe use of perf", |
| [LOCKDOWN_TRACEFS] = "use of tracefs", |
| [LOCKDOWN_XMON_RW] = "xmon read and write access", |
| [LOCKDOWN_XFRM_SECRET] = "xfrm SA secret", |
| [LOCKDOWN_CONFIDENTIALITY_MAX] = "confidentiality", |
| }; |
| |
| struct security_hook_heads security_hook_heads __lsm_ro_after_init; |
| static BLOCKING_NOTIFIER_HEAD(blocking_lsm_notifier_chain); |
| |
| static struct kmem_cache *lsm_file_cache; |
| static struct kmem_cache *lsm_inode_cache; |
| |
| char *lsm_names; |
| static struct lsm_blob_sizes blob_sizes __lsm_ro_after_init; |
| |
| /* Boot-time LSM user choice */ |
| static __initdata const char *chosen_lsm_order; |
| static __initdata const char *chosen_major_lsm; |
| |
| static __initconst const char * const builtin_lsm_order = CONFIG_LSM; |
| |
| /* Ordered list of LSMs to initialize. */ |
| static __initdata struct lsm_info **ordered_lsms; |
| static __initdata struct lsm_info *exclusive; |
| |
| static __initdata bool debug; |
| #define init_debug(...) \ |
| do { \ |
| if (debug) \ |
| pr_info(__VA_ARGS__); \ |
| } while (0) |
| |
| static bool __init is_enabled(struct lsm_info *lsm) |
| { |
| if (!lsm->enabled) |
| return false; |
| |
| return *lsm->enabled; |
| } |
| |
| /* Mark an LSM's enabled flag. */ |
| static int lsm_enabled_true __initdata = 1; |
| static int lsm_enabled_false __initdata = 0; |
| static void __init set_enabled(struct lsm_info *lsm, bool enabled) |
| { |
| /* |
| * When an LSM hasn't configured an enable variable, we can use |
| * a hard-coded location for storing the default enabled state. |
| */ |
| if (!lsm->enabled) { |
| if (enabled) |
| lsm->enabled = &lsm_enabled_true; |
| else |
| lsm->enabled = &lsm_enabled_false; |
| } else if (lsm->enabled == &lsm_enabled_true) { |
| if (!enabled) |
| lsm->enabled = &lsm_enabled_false; |
| } else if (lsm->enabled == &lsm_enabled_false) { |
| if (enabled) |
| lsm->enabled = &lsm_enabled_true; |
| } else { |
| *lsm->enabled = enabled; |
| } |
| } |
| |
| /* Is an LSM already listed in the ordered LSMs list? */ |
| static bool __init exists_ordered_lsm(struct lsm_info *lsm) |
| { |
| struct lsm_info **check; |
| |
| for (check = ordered_lsms; *check; check++) |
| if (*check == lsm) |
| return true; |
| |
| return false; |
| } |
| |
| /* Append an LSM to the list of ordered LSMs to initialize. */ |
| static int last_lsm __initdata; |
| static void __init append_ordered_lsm(struct lsm_info *lsm, const char *from) |
| { |
| /* Ignore duplicate selections. */ |
| if (exists_ordered_lsm(lsm)) |
| return; |
| |
| if (WARN(last_lsm == LSM_COUNT, "%s: out of LSM slots!?\n", from)) |
| return; |
| |
| /* Enable this LSM, if it is not already set. */ |
| if (!lsm->enabled) |
| lsm->enabled = &lsm_enabled_true; |
| ordered_lsms[last_lsm++] = lsm; |
| |
| init_debug("%s ordering: %s (%sabled)\n", from, lsm->name, |
| is_enabled(lsm) ? "en" : "dis"); |
| } |
| |
| /* Is an LSM allowed to be initialized? */ |
| static bool __init lsm_allowed(struct lsm_info *lsm) |
| { |
| /* Skip if the LSM is disabled. */ |
| if (!is_enabled(lsm)) |
| return false; |
| |
| /* Not allowed if another exclusive LSM already initialized. */ |
| if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && exclusive) { |
| init_debug("exclusive disabled: %s\n", lsm->name); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| static void __init lsm_set_blob_size(int *need, int *lbs) |
| { |
| int offset; |
| |
| if (*need > 0) { |
| offset = *lbs; |
| *lbs += *need; |
| *need = offset; |
| } |
| } |
| |
| static void __init lsm_set_blob_sizes(struct lsm_blob_sizes *needed) |
| { |
| if (!needed) |
| return; |
| |
| lsm_set_blob_size(&needed->lbs_cred, &blob_sizes.lbs_cred); |
| lsm_set_blob_size(&needed->lbs_file, &blob_sizes.lbs_file); |
| /* |
| * The inode blob gets an rcu_head in addition to |
| * what the modules might need. |
| */ |
| if (needed->lbs_inode && blob_sizes.lbs_inode == 0) |
| blob_sizes.lbs_inode = sizeof(struct rcu_head); |
| lsm_set_blob_size(&needed->lbs_inode, &blob_sizes.lbs_inode); |
| lsm_set_blob_size(&needed->lbs_ipc, &blob_sizes.lbs_ipc); |
| lsm_set_blob_size(&needed->lbs_msg_msg, &blob_sizes.lbs_msg_msg); |
| lsm_set_blob_size(&needed->lbs_superblock, &blob_sizes.lbs_superblock); |
| lsm_set_blob_size(&needed->lbs_task, &blob_sizes.lbs_task); |
| } |
| |
| /* Prepare LSM for initialization. */ |
| static void __init prepare_lsm(struct lsm_info *lsm) |
| { |
| int enabled = lsm_allowed(lsm); |
| |
| /* Record enablement (to handle any following exclusive LSMs). */ |
| set_enabled(lsm, enabled); |
| |
| /* If enabled, do pre-initialization work. */ |
| if (enabled) { |
| if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && !exclusive) { |
| exclusive = lsm; |
| init_debug("exclusive chosen: %s\n", lsm->name); |
| } |
| |
| lsm_set_blob_sizes(lsm->blobs); |
| } |
| } |
| |
| /* Initialize a given LSM, if it is enabled. */ |
| static void __init initialize_lsm(struct lsm_info *lsm) |
| { |
| if (is_enabled(lsm)) { |
| int ret; |
| |
| init_debug("initializing %s\n", lsm->name); |
| ret = lsm->init(); |
| WARN(ret, "%s failed to initialize: %d\n", lsm->name, ret); |
| } |
| } |
| |
| /* Populate ordered LSMs list from comma-separated LSM name list. */ |
| static void __init ordered_lsm_parse(const char *order, const char *origin) |
| { |
| struct lsm_info *lsm; |
| char *sep, *name, *next; |
| |
| /* LSM_ORDER_FIRST is always first. */ |
| for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { |
| if (lsm->order == LSM_ORDER_FIRST) |
| append_ordered_lsm(lsm, "first"); |
| } |
| |
| /* Process "security=", if given. */ |
| if (chosen_major_lsm) { |
| struct lsm_info *major; |
| |
| /* |
| * To match the original "security=" behavior, this |
| * explicitly does NOT fallback to another Legacy Major |
| * if the selected one was separately disabled: disable |
| * all non-matching Legacy Major LSMs. |
| */ |
| for (major = __start_lsm_info; major < __end_lsm_info; |
| major++) { |
| if ((major->flags & LSM_FLAG_LEGACY_MAJOR) && |
| strcmp(major->name, chosen_major_lsm) != 0) { |
| set_enabled(major, false); |
| init_debug("security=%s disabled: %s\n", |
| chosen_major_lsm, major->name); |
| } |
| } |
| } |
| |
| sep = kstrdup(order, GFP_KERNEL); |
| next = sep; |
| /* Walk the list, looking for matching LSMs. */ |
| while ((name = strsep(&next, ",")) != NULL) { |
| bool found = false; |
| |
| for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { |
| if (lsm->order == LSM_ORDER_MUTABLE && |
| strcmp(lsm->name, name) == 0) { |
| append_ordered_lsm(lsm, origin); |
| found = true; |
| } |
| } |
| |
| if (!found) |
| init_debug("%s ignored: %s\n", origin, name); |
| } |
| |
| /* Process "security=", if given. */ |
| if (chosen_major_lsm) { |
| for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { |
| if (exists_ordered_lsm(lsm)) |
| continue; |
| if (strcmp(lsm->name, chosen_major_lsm) == 0) |
| append_ordered_lsm(lsm, "security="); |
| } |
| } |
| |
| /* Disable all LSMs not in the ordered list. */ |
| for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { |
| if (exists_ordered_lsm(lsm)) |
| continue; |
| set_enabled(lsm, false); |
| init_debug("%s disabled: %s\n", origin, lsm->name); |
| } |
| |
| kfree(sep); |
| } |
| |
| static void __init lsm_early_cred(struct cred *cred); |
| static void __init lsm_early_task(struct task_struct *task); |
| |
| static int lsm_append(const char *new, char **result); |
| |
| static void __init ordered_lsm_init(void) |
| { |
| struct lsm_info **lsm; |
| |
| ordered_lsms = kcalloc(LSM_COUNT + 1, sizeof(*ordered_lsms), |
| GFP_KERNEL); |
| |
| if (chosen_lsm_order) { |
| if (chosen_major_lsm) { |
| pr_info("security= is ignored because it is superseded by lsm=\n"); |
| chosen_major_lsm = NULL; |
| } |
| ordered_lsm_parse(chosen_lsm_order, "cmdline"); |
| } else |
| ordered_lsm_parse(builtin_lsm_order, "builtin"); |
| |
| for (lsm = ordered_lsms; *lsm; lsm++) |
| prepare_lsm(*lsm); |
| |
| init_debug("cred blob size = %d\n", blob_sizes.lbs_cred); |
| init_debug("file blob size = %d\n", blob_sizes.lbs_file); |
| init_debug("inode blob size = %d\n", blob_sizes.lbs_inode); |
| init_debug("ipc blob size = %d\n", blob_sizes.lbs_ipc); |
| init_debug("msg_msg blob size = %d\n", blob_sizes.lbs_msg_msg); |
| init_debug("superblock blob size = %d\n", blob_sizes.lbs_superblock); |
| init_debug("task blob size = %d\n", blob_sizes.lbs_task); |
| |
| /* |
| * Create any kmem_caches needed for blobs |
| */ |
| if (blob_sizes.lbs_file) |
| lsm_file_cache = kmem_cache_create("lsm_file_cache", |
| blob_sizes.lbs_file, 0, |
| SLAB_PANIC, NULL); |
| if (blob_sizes.lbs_inode) |
| lsm_inode_cache = kmem_cache_create("lsm_inode_cache", |
| blob_sizes.lbs_inode, 0, |
| SLAB_PANIC, NULL); |
| |
| lsm_early_cred((struct cred *) current->cred); |
| lsm_early_task(current); |
| for (lsm = ordered_lsms; *lsm; lsm++) |
| initialize_lsm(*lsm); |
| |
| kfree(ordered_lsms); |
| } |
| |
| int __init early_security_init(void) |
| { |
| int i; |
| struct hlist_head *list = (struct hlist_head *) &security_hook_heads; |
| struct lsm_info *lsm; |
| |
| for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct hlist_head); |
| i++) |
| INIT_HLIST_HEAD(&list[i]); |
| |
| for (lsm = __start_early_lsm_info; lsm < __end_early_lsm_info; lsm++) { |
| if (!lsm->enabled) |
| lsm->enabled = &lsm_enabled_true; |
| prepare_lsm(lsm); |
| initialize_lsm(lsm); |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * security_init - initializes the security framework |
| * |
| * This should be called early in the kernel initialization sequence. |
| */ |
| int __init security_init(void) |
| { |
| struct lsm_info *lsm; |
| |
| pr_info("Security Framework initializing\n"); |
| |
| /* |
| * Append the names of the early LSM modules now that kmalloc() is |
| * available |
| */ |
| for (lsm = __start_early_lsm_info; lsm < __end_early_lsm_info; lsm++) { |
| if (lsm->enabled) |
| lsm_append(lsm->name, &lsm_names); |
| } |
| |
| /* Load LSMs in specified order. */ |
| ordered_lsm_init(); |
| |
| return 0; |
| } |
| |
| /* Save user chosen LSM */ |
| static int __init choose_major_lsm(char *str) |
| { |
| chosen_major_lsm = str; |
| return 1; |
| } |
| __setup("security=", choose_major_lsm); |
| |
| /* Explicitly choose LSM initialization order. */ |
| static int __init choose_lsm_order(char *str) |
| { |
| chosen_lsm_order = str; |
| return 1; |
| } |
| __setup("lsm=", choose_lsm_order); |
| |
| /* Enable LSM order debugging. */ |
| static int __init enable_debug(char *str) |
| { |
| debug = true; |
| return 1; |
| } |
| __setup("lsm.debug", enable_debug); |
| |
| static bool match_last_lsm(const char *list, const char *lsm) |
| { |
| const char *last; |
| |
| if (WARN_ON(!list || !lsm)) |
| return false; |
| last = strrchr(list, ','); |
| if (last) |
| /* Pass the comma, strcmp() will check for '\0' */ |
| last++; |
| else |
| last = list; |
| return !strcmp(last, lsm); |
| } |
| |
| static int lsm_append(const char *new, char **result) |
| { |
| char *cp; |
| |
| if (*result == NULL) { |
| *result = kstrdup(new, GFP_KERNEL); |
| if (*result == NULL) |
| return -ENOMEM; |
| } else { |
| /* Check if it is the last registered name */ |
| if (match_last_lsm(*result, new)) |
| return 0; |
| cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new); |
| if (cp == NULL) |
| return -ENOMEM; |
| kfree(*result); |
| *result = cp; |
| } |
| return 0; |
| } |
| |
| /** |
| * security_add_hooks - Add a modules hooks to the hook lists. |
| * @hooks: the hooks to add |
| * @count: the number of hooks to add |
| * @lsm: the name of the security module |
| * |
| * Each LSM has to register its hooks with the infrastructure. |
| */ |
| void __init security_add_hooks(struct security_hook_list *hooks, int count, |
| char *lsm) |
| { |
| int i; |
| |
| for (i = 0; i < count; i++) { |
| hooks[i].lsm = lsm; |
| hlist_add_tail_rcu(&hooks[i].list, hooks[i].head); |
| } |
| |
| /* |
| * Don't try to append during early_security_init(), we'll come back |
| * and fix this up afterwards. |
| */ |
| if (slab_is_available()) { |
| if (lsm_append(lsm, &lsm_names) < 0) |
| panic("%s - Cannot get early memory.\n", __func__); |
| } |
| } |
| |
| int call_blocking_lsm_notifier(enum lsm_event event, void *data) |
| { |
| return blocking_notifier_call_chain(&blocking_lsm_notifier_chain, |
| event, data); |
| } |
| EXPORT_SYMBOL(call_blocking_lsm_notifier); |
| |
| int register_blocking_lsm_notifier(struct notifier_block *nb) |
| { |
| return blocking_notifier_chain_register(&blocking_lsm_notifier_chain, |
| nb); |
| } |
| EXPORT_SYMBOL(register_blocking_lsm_notifier); |
| |
| int unregister_blocking_lsm_notifier(struct notifier_block *nb) |
| { |
| return blocking_notifier_chain_unregister(&blocking_lsm_notifier_chain, |
| nb); |
| } |
| EXPORT_SYMBOL(unregister_blocking_lsm_notifier); |
| |
| /** |
| * lsm_cred_alloc - allocate a composite cred blob |
| * @cred: the cred that needs a blob |
| * @gfp: allocation type |
| * |
| * Allocate the cred blob for all the modules |
| * |
| * Returns 0, or -ENOMEM if memory can't be allocated. |
| */ |
| static int lsm_cred_alloc(struct cred *cred, gfp_t gfp) |
| { |
| if (blob_sizes.lbs_cred == 0) { |
| cred->security = NULL; |
| return 0; |
| } |
| |
| cred->security = kzalloc(blob_sizes.lbs_cred, gfp); |
| if (cred->security == NULL) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| /** |
| * lsm_early_cred - during initialization allocate a composite cred blob |
| * @cred: the cred that needs a blob |
| * |
| * Allocate the cred blob for all the modules |
| */ |
| static void __init lsm_early_cred(struct cred *cred) |
| { |
| int rc = lsm_cred_alloc(cred, GFP_KERNEL); |
| |
| if (rc) |
| panic("%s: Early cred alloc failed.\n", __func__); |
| } |
| |
| /** |
| * lsm_file_alloc - allocate a composite file blob |
| * @file: the file that needs a blob |
| * |
| * Allocate the file blob for all the modules |
| * |
| * Returns 0, or -ENOMEM if memory can't be allocated. |
| */ |
| static int lsm_file_alloc(struct file *file) |
| { |
| if (!lsm_file_cache) { |
| file->f_security = NULL; |
| return 0; |
| } |
| |
| file->f_security = kmem_cache_zalloc(lsm_file_cache, GFP_KERNEL); |
| if (file->f_security == NULL) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| /** |
| * lsm_inode_alloc - allocate a composite inode blob |
| * @inode: the inode that needs a blob |
| * |
| * Allocate the inode blob for all the modules |
| * |
| * Returns 0, or -ENOMEM if memory can't be allocated. |
| */ |
| int lsm_inode_alloc(struct inode *inode) |
| { |
| if (!lsm_inode_cache) { |
| inode->i_security = NULL; |
| return 0; |
| } |
| |
| inode->i_security = kmem_cache_zalloc(lsm_inode_cache, GFP_NOFS); |
| if (inode->i_security == NULL) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| /** |
| * lsm_task_alloc - allocate a composite task blob |
| * @task: the task that needs a blob |
| * |
| * Allocate the task blob for all the modules |
| * |
| * Returns 0, or -ENOMEM if memory can't be allocated. |
| */ |
| static int lsm_task_alloc(struct task_struct *task) |
| { |
| if (blob_sizes.lbs_task == 0) { |
| task->security = NULL; |
| return 0; |
| } |
| |
| task->security = kzalloc(blob_sizes.lbs_task, GFP_KERNEL); |
| if (task->security == NULL) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| /** |
| * lsm_ipc_alloc - allocate a composite ipc blob |
| * @kip: the ipc that needs a blob |
| * |
| * Allocate the ipc blob for all the modules |
| * |
| * Returns 0, or -ENOMEM if memory can't be allocated. |
| */ |
| static int lsm_ipc_alloc(struct kern_ipc_perm *kip) |
| { |
| if (blob_sizes.lbs_ipc == 0) { |
| kip->security = NULL; |
| return 0; |
| } |
| |
| kip->security = kzalloc(blob_sizes.lbs_ipc, GFP_KERNEL); |
| if (kip->security == NULL) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| /** |
| * lsm_msg_msg_alloc - allocate a composite msg_msg blob |
| * @mp: the msg_msg that needs a blob |
| * |
| * Allocate the ipc blob for all the modules |
| * |
| * Returns 0, or -ENOMEM if memory can't be allocated. |
| */ |
| static int lsm_msg_msg_alloc(struct msg_msg *mp) |
| { |
| if (blob_sizes.lbs_msg_msg == 0) { |
| mp->security = NULL; |
| return 0; |
| } |
| |
| mp->security = kzalloc(blob_sizes.lbs_msg_msg, GFP_KERNEL); |
| if (mp->security == NULL) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| /** |
| * lsm_early_task - during initialization allocate a composite task blob |
| * @task: the task that needs a blob |
| * |
| * Allocate the task blob for all the modules |
| */ |
| static void __init lsm_early_task(struct task_struct *task) |
| { |
| int rc = lsm_task_alloc(task); |
| |
| if (rc) |
| panic("%s: Early task alloc failed.\n", __func__); |
| } |
| |
| /** |
| * lsm_superblock_alloc - allocate a composite superblock blob |
| * @sb: the superblock that needs a blob |
| * |
| * Allocate the superblock blob for all the modules |
| * |
| * Returns 0, or -ENOMEM if memory can't be allocated. |
| */ |
| static int lsm_superblock_alloc(struct super_block *sb) |
| { |
| if (blob_sizes.lbs_superblock == 0) { |
| sb->s_security = NULL; |
| return 0; |
| } |
| |
| sb->s_security = kzalloc(blob_sizes.lbs_superblock, GFP_KERNEL); |
| if (sb->s_security == NULL) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| /* |
| * The default value of the LSM hook is defined in linux/lsm_hook_defs.h and |
| * can be accessed with: |
| * |
| * LSM_RET_DEFAULT(<hook_name>) |
| * |
| * The macros below define static constants for the default value of each |
| * LSM hook. |
| */ |
| #define LSM_RET_DEFAULT(NAME) (NAME##_default) |
| #define DECLARE_LSM_RET_DEFAULT_void(DEFAULT, NAME) |
| #define DECLARE_LSM_RET_DEFAULT_int(DEFAULT, NAME) \ |
| static const int LSM_RET_DEFAULT(NAME) = (DEFAULT); |
| #define LSM_HOOK(RET, DEFAULT, NAME, ...) \ |
| DECLARE_LSM_RET_DEFAULT_##RET(DEFAULT, NAME) |
| |
| #include <linux/lsm_hook_defs.h> |
| #undef LSM_HOOK |
| |
| /* |
| * Hook list operation macros. |
| * |
| * call_void_hook: |
| * This is a hook that does not return a value. |
| * |
| * call_int_hook: |
| * This is a hook that returns a value. |
| */ |
| |
| #define call_void_hook(FUNC, ...) \ |
| do { \ |
| struct security_hook_list *P; \ |
| \ |
| hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \ |
| P->hook.FUNC(__VA_ARGS__); \ |
| } while (0) |
| |
| #define call_int_hook(FUNC, IRC, ...) ({ \ |
| int RC = IRC; \ |
| do { \ |
| struct security_hook_list *P; \ |
| \ |
| hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \ |
| RC = P->hook.FUNC(__VA_ARGS__); \ |
| if (RC != 0) \ |
| break; \ |
| } \ |
| } while (0); \ |
| RC; \ |
| }) |
| |
| /* Security operations */ |
| |
| int security_binder_set_context_mgr(const struct cred *mgr) |
| { |
| return call_int_hook(binder_set_context_mgr, 0, mgr); |
| } |
| |
| int security_binder_transaction(const struct cred *from, |
| const struct cred *to) |
| { |
| return call_int_hook(binder_transaction, 0, from, to); |
| } |
| |
| int security_binder_transfer_binder(const struct cred *from, |
| const struct cred *to) |
| { |
| return call_int_hook(binder_transfer_binder, 0, from, to); |
| } |
| |
| int security_binder_transfer_file(const struct cred *from, |
| const struct cred *to, struct file *file) |
| { |
| return call_int_hook(binder_transfer_file, 0, from, to, file); |
| } |
| |
| int security_ptrace_access_check(struct task_struct *child, unsigned int mode) |
| { |
| return call_int_hook(ptrace_access_check, 0, child, mode); |
| } |
| |
| int security_ptrace_traceme(struct task_struct *parent) |
| { |
| return call_int_hook(ptrace_traceme, 0, parent); |
| } |
| |
| int security_capget(struct task_struct *target, |
| kernel_cap_t *effective, |
| kernel_cap_t *inheritable, |
| kernel_cap_t *permitted) |
| { |
| return call_int_hook(capget, 0, target, |
| effective, inheritable, permitted); |
| } |
| |
| int security_capset(struct cred *new, const struct cred *old, |
| const kernel_cap_t *effective, |
| const kernel_cap_t *inheritable, |
| const kernel_cap_t *permitted) |
| { |
| return call_int_hook(capset, 0, new, old, |
| effective, inheritable, permitted); |
| } |
| |
| int security_capable(const struct cred *cred, |
| struct user_namespace *ns, |
| int cap, |
| unsigned int opts) |
| { |
| return call_int_hook(capable, 0, cred, ns, cap, opts); |
| } |
| |
| int security_quotactl(int cmds, int type, int id, struct super_block *sb) |
| { |
| return call_int_hook(quotactl, 0, cmds, type, id, sb); |
| } |
| |
| int security_quota_on(struct dentry *dentry) |
| { |
| return call_int_hook(quota_on, 0, dentry); |
| } |
| |
| int security_syslog(int type) |
| { |
| return call_int_hook(syslog, 0, type); |
| } |
| |
| int security_settime64(const struct timespec64 *ts, const struct timezone *tz) |
| { |
| return call_int_hook(settime, 0, ts, tz); |
| } |
| |
| int security_vm_enough_memory_mm(struct mm_struct *mm, long pages) |
| { |
| struct security_hook_list *hp; |
| int cap_sys_admin = 1; |
| int rc; |
| |
| /* |
| * The module will respond with a positive value if |
| * it thinks the __vm_enough_memory() call should be |
| * made with the cap_sys_admin set. If all of the modules |
| * agree that it should be set it will. If any module |
| * thinks it should not be set it won't. |
| */ |
| hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) { |
| rc = hp->hook.vm_enough_memory(mm, pages); |
| if (rc <= 0) { |
| cap_sys_admin = 0; |
| break; |
| } |
| } |
| return __vm_enough_memory(mm, pages, cap_sys_admin); |
| } |
| |
| int security_bprm_creds_for_exec(struct linux_binprm *bprm) |
| { |
| return call_int_hook(bprm_creds_for_exec, 0, bprm); |
| } |
| |
| int security_bprm_creds_from_file(struct linux_binprm *bprm, struct file *file) |
| { |
| return call_int_hook(bprm_creds_from_file, 0, bprm, file); |
| } |
| |
| int security_bprm_check(struct linux_binprm *bprm) |
| { |
| int ret; |
| |
| ret = call_int_hook(bprm_check_security, 0, bprm); |
| if (ret) |
| return ret; |
| return ima_bprm_check(bprm); |
| } |
| |
| void security_bprm_committing_creds(struct linux_binprm *bprm) |
| { |
| call_void_hook(bprm_committing_creds, bprm); |
| } |
| |
| void security_bprm_committed_creds(struct linux_binprm *bprm) |
| { |
| call_void_hook(bprm_committed_creds, bprm); |
| } |
| |
| int security_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc) |
| { |
| return call_int_hook(fs_context_dup, 0, fc, src_fc); |
| } |
| |
| int security_fs_context_parse_param(struct fs_context *fc, |
| struct fs_parameter *param) |
| { |
| struct security_hook_list *hp; |
| int trc; |
| int rc = -ENOPARAM; |
| |
| hlist_for_each_entry(hp, &security_hook_heads.fs_context_parse_param, |
| list) { |
| trc = hp->hook.fs_context_parse_param(fc, param); |
| if (trc == 0) |
| rc = 0; |
| else if (trc != -ENOPARAM) |
| return trc; |
| } |
| return rc; |
| } |
| |
| int security_sb_alloc(struct super_block *sb) |
| { |
| int rc = lsm_superblock_alloc(sb); |
| |
| if (unlikely(rc)) |
| return rc; |
| rc = call_int_hook(sb_alloc_security, 0, sb); |
| if (unlikely(rc)) |
| security_sb_free(sb); |
| return rc; |
| } |
| |
| void security_sb_delete(struct super_block *sb) |
| { |
| call_void_hook(sb_delete, sb); |
| } |
| |
| void security_sb_free(struct super_block *sb) |
| { |
| call_void_hook(sb_free_security, sb); |
| kfree(sb->s_security); |
| sb->s_security = NULL; |
| } |
| |
| void security_free_mnt_opts(void **mnt_opts) |
| { |
| if (!*mnt_opts) |
| return; |
| call_void_hook(sb_free_mnt_opts, *mnt_opts); |
| *mnt_opts = NULL; |
| } |
| EXPORT_SYMBOL(security_free_mnt_opts); |
| |
| int security_sb_eat_lsm_opts(char *options, void **mnt_opts) |
| { |
| return call_int_hook(sb_eat_lsm_opts, 0, options, mnt_opts); |
| } |
| EXPORT_SYMBOL(security_sb_eat_lsm_opts); |
| |
| int security_sb_mnt_opts_compat(struct super_block *sb, |
| void *mnt_opts) |
| { |
| return call_int_hook(sb_mnt_opts_compat, 0, sb, mnt_opts); |
| } |
| EXPORT_SYMBOL(security_sb_mnt_opts_compat); |
| |
| int security_sb_remount(struct super_block *sb, |
| void *mnt_opts) |
| { |
| return call_int_hook(sb_remount, 0, sb, mnt_opts); |
| } |
| EXPORT_SYMBOL(security_sb_remount); |
| |
| int security_sb_kern_mount(struct super_block *sb) |
| { |
| return call_int_hook(sb_kern_mount, 0, sb); |
| } |
| |
| int security_sb_show_options(struct seq_file *m, struct super_block *sb) |
| { |
| return call_int_hook(sb_show_options, 0, m, sb); |
| } |
| |
| int security_sb_statfs(struct dentry *dentry) |
| { |
| return call_int_hook(sb_statfs, 0, dentry); |
| } |
| |
| int security_sb_mount(const char *dev_name, const struct path *path, |
| const char *type, unsigned long flags, void *data) |
| { |
| return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data); |
| } |
| |
| int security_sb_umount(struct vfsmount *mnt, int flags) |
| { |
| return call_int_hook(sb_umount, 0, mnt, flags); |
| } |
| |
| int security_sb_pivotroot(const struct path *old_path, const struct path *new_path) |
| { |
| return call_int_hook(sb_pivotroot, 0, old_path, new_path); |
| } |
| |
| int security_sb_set_mnt_opts(struct super_block *sb, |
| void *mnt_opts, |
| unsigned long kern_flags, |
| unsigned long *set_kern_flags) |
| { |
| return call_int_hook(sb_set_mnt_opts, |
| mnt_opts ? -EOPNOTSUPP : 0, sb, |
| mnt_opts, kern_flags, set_kern_flags); |
| } |
| EXPORT_SYMBOL(security_sb_set_mnt_opts); |
| |
| int security_sb_clone_mnt_opts(const struct super_block *oldsb, |
| struct super_block *newsb, |
| unsigned long kern_flags, |
| unsigned long *set_kern_flags) |
| { |
| return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb, |
| kern_flags, set_kern_flags); |
| } |
| EXPORT_SYMBOL(security_sb_clone_mnt_opts); |
| |
| int security_add_mnt_opt(const char *option, const char *val, int len, |
| void **mnt_opts) |
| { |
| return call_int_hook(sb_add_mnt_opt, -EINVAL, |
| option, val, len, mnt_opts); |
| } |
| EXPORT_SYMBOL(security_add_mnt_opt); |
| |
| int security_move_mount(const struct path *from_path, const struct path *to_path) |
| { |
| return call_int_hook(move_mount, 0, from_path, to_path); |
| } |
| |
| int security_path_notify(const struct path *path, u64 mask, |
| unsigned int obj_type) |
| { |
| return call_int_hook(path_notify, 0, path, mask, obj_type); |
| } |
| |
| int security_inode_alloc(struct inode *inode) |
| { |
| int rc = lsm_inode_alloc(inode); |
| |
| if (unlikely(rc)) |
| return rc; |
| rc = call_int_hook(inode_alloc_security, 0, inode); |
| if (unlikely(rc)) |
| security_inode_free(inode); |
| return rc; |
| } |
| |
| static void inode_free_by_rcu(struct rcu_head *head) |
| { |
| /* |
| * The rcu head is at the start of the inode blob |
| */ |
| kmem_cache_free(lsm_inode_cache, head); |
| } |
| |
| void security_inode_free(struct inode *inode) |
| { |
| integrity_inode_free(inode); |
| call_void_hook(inode_free_security, inode); |
| /* |
| * The inode may still be referenced in a path walk and |
| * a call to security_inode_permission() can be made |
| * after inode_free_security() is called. Ideally, the VFS |
| * wouldn't do this, but fixing that is a much harder |
| * job. For now, simply free the i_security via RCU, and |
| * leave the current inode->i_security pointer intact. |
| * The inode will be freed after the RCU grace period too. |
| */ |
| if (inode->i_security) |
| call_rcu((struct rcu_head *)inode->i_security, |
| inode_free_by_rcu); |
| } |
| |
| int security_dentry_init_security(struct dentry *dentry, int mode, |
| const struct qstr *name, |
| const char **xattr_name, void **ctx, |
| u32 *ctxlen) |
| { |
| return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode, |
| name, xattr_name, ctx, ctxlen); |
| } |
| EXPORT_SYMBOL(security_dentry_init_security); |
| |
| int security_dentry_create_files_as(struct dentry *dentry, int mode, |
| struct qstr *name, |
| const struct cred *old, struct cred *new) |
| { |
| return call_int_hook(dentry_create_files_as, 0, dentry, mode, |
| name, old, new); |
| } |
| EXPORT_SYMBOL(security_dentry_create_files_as); |
| |
| int security_inode_init_security(struct inode *inode, struct inode *dir, |
| const struct qstr *qstr, |
| const initxattrs initxattrs, void *fs_data) |
| { |
| struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1]; |
| struct xattr *lsm_xattr, *evm_xattr, *xattr; |
| int ret; |
| |
| if (unlikely(IS_PRIVATE(inode))) |
| return 0; |
| |
| if (!initxattrs) |
| return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, |
| dir, qstr, NULL, NULL, NULL); |
| memset(new_xattrs, 0, sizeof(new_xattrs)); |
| lsm_xattr = new_xattrs; |
| ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr, |
| &lsm_xattr->name, |
| &lsm_xattr->value, |
| &lsm_xattr->value_len); |
| if (ret) |
| goto out; |
| |
| evm_xattr = lsm_xattr + 1; |
| ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr); |
| if (ret) |
| goto out; |
| ret = initxattrs(inode, new_xattrs, fs_data); |
| out: |
| for (xattr = new_xattrs; xattr->value != NULL; xattr++) |
| kfree(xattr->value); |
| return (ret == -EOPNOTSUPP) ? 0 : ret; |
| } |
| EXPORT_SYMBOL(security_inode_init_security); |
| |
| int security_inode_init_security_anon(struct inode *inode, |
| const struct qstr *name, |
| const struct inode *context_inode) |
| { |
| return call_int_hook(inode_init_security_anon, 0, inode, name, |
| context_inode); |
| } |
| |
| int security_old_inode_init_security(struct inode *inode, struct inode *dir, |
| const struct qstr *qstr, const char **name, |
| void **value, size_t *len) |
| { |
| if (unlikely(IS_PRIVATE(inode))) |
| return -EOPNOTSUPP; |
| return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, |
| qstr, name, value, len); |
| } |
| EXPORT_SYMBOL(security_old_inode_init_security); |
| |
| #ifdef CONFIG_SECURITY_PATH |
| int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode, |
| unsigned int dev) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
| return 0; |
| return call_int_hook(path_mknod, 0, dir, dentry, mode, dev); |
| } |
| EXPORT_SYMBOL(security_path_mknod); |
| |
| int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
| return 0; |
| return call_int_hook(path_mkdir, 0, dir, dentry, mode); |
| } |
| EXPORT_SYMBOL(security_path_mkdir); |
| |
| int security_path_rmdir(const struct path *dir, struct dentry *dentry) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
| return 0; |
| return call_int_hook(path_rmdir, 0, dir, dentry); |
| } |
| |
| int security_path_unlink(const struct path *dir, struct dentry *dentry) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
| return 0; |
| return call_int_hook(path_unlink, 0, dir, dentry); |
| } |
| EXPORT_SYMBOL(security_path_unlink); |
| |
| int security_path_symlink(const struct path *dir, struct dentry *dentry, |
| const char *old_name) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) |
| return 0; |
| return call_int_hook(path_symlink, 0, dir, dentry, old_name); |
| } |
| |
| int security_path_link(struct dentry *old_dentry, const struct path *new_dir, |
| struct dentry *new_dentry) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) |
| return 0; |
| return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry); |
| } |
| |
| int security_path_rename(const struct path *old_dir, struct dentry *old_dentry, |
| const struct path *new_dir, struct dentry *new_dentry, |
| unsigned int flags) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || |
| (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) |
| return 0; |
| |
| if (flags & RENAME_EXCHANGE) { |
| int err = call_int_hook(path_rename, 0, new_dir, new_dentry, |
| old_dir, old_dentry); |
| if (err) |
| return err; |
| } |
| |
| return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir, |
| new_dentry); |
| } |
| EXPORT_SYMBOL(security_path_rename); |
| |
| int security_path_truncate(const struct path *path) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) |
| return 0; |
| return call_int_hook(path_truncate, 0, path); |
| } |
| |
| int security_path_chmod(const struct path *path, umode_t mode) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) |
| return 0; |
| return call_int_hook(path_chmod, 0, path, mode); |
| } |
| |
| int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) |
| return 0; |
| return call_int_hook(path_chown, 0, path, uid, gid); |
| } |
| |
| int security_path_chroot(const struct path *path) |
| { |
| return call_int_hook(path_chroot, 0, path); |
| } |
| #endif |
| |
| int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode) |
| { |
| if (unlikely(IS_PRIVATE(dir))) |
| return 0; |
| return call_int_hook(inode_create, 0, dir, dentry, mode); |
| } |
| EXPORT_SYMBOL_GPL(security_inode_create); |
| |
| int security_inode_link(struct dentry *old_dentry, struct inode *dir, |
| struct dentry *new_dentry) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) |
| return 0; |
| return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry); |
| } |
| |
| int security_inode_unlink(struct inode *dir, struct dentry *dentry) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
| return 0; |
| return call_int_hook(inode_unlink, 0, dir, dentry); |
| } |
| |
| int security_inode_symlink(struct inode *dir, struct dentry *dentry, |
| const char *old_name) |
| { |
| if (unlikely(IS_PRIVATE(dir))) |
| return 0; |
| return call_int_hook(inode_symlink, 0, dir, dentry, old_name); |
| } |
| |
| int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
| { |
| if (unlikely(IS_PRIVATE(dir))) |
| return 0; |
| return call_int_hook(inode_mkdir, 0, dir, dentry, mode); |
| } |
| EXPORT_SYMBOL_GPL(security_inode_mkdir); |
| |
| int security_inode_rmdir(struct inode *dir, struct dentry *dentry) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
| return 0; |
| return call_int_hook(inode_rmdir, 0, dir, dentry); |
| } |
| |
| int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev) |
| { |
| if (unlikely(IS_PRIVATE(dir))) |
| return 0; |
| return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev); |
| } |
| |
| int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry, |
| struct inode *new_dir, struct dentry *new_dentry, |
| unsigned int flags) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || |
| (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) |
| return 0; |
| |
| if (flags & RENAME_EXCHANGE) { |
| int err = call_int_hook(inode_rename, 0, new_dir, new_dentry, |
| old_dir, old_dentry); |
| if (err) |
| return err; |
| } |
| |
| return call_int_hook(inode_rename, 0, old_dir, old_dentry, |
| new_dir, new_dentry); |
| } |
| |
| int security_inode_readlink(struct dentry *dentry) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
| return 0; |
| return call_int_hook(inode_readlink, 0, dentry); |
| } |
| |
| int security_inode_follow_link(struct dentry *dentry, struct inode *inode, |
| bool rcu) |
| { |
| if (unlikely(IS_PRIVATE(inode))) |
| return 0; |
| return call_int_hook(inode_follow_link, 0, dentry, inode, rcu); |
| } |
| |
| int security_inode_permission(struct inode *inode, int mask) |
| { |
| if (unlikely(IS_PRIVATE(inode))) |
| return 0; |
| return call_int_hook(inode_permission, 0, inode, mask); |
| } |
| |
| int security_inode_setattr(struct dentry *dentry, struct iattr *attr) |
| { |
| int ret; |
| |
| if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
| return 0; |
| ret = call_int_hook(inode_setattr, 0, dentry, attr); |
| if (ret) |
| return ret; |
| return evm_inode_setattr(dentry, attr); |
| } |
| EXPORT_SYMBOL_GPL(security_inode_setattr); |
| |
| int security_inode_getattr(const struct path *path) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) |
| return 0; |
| return call_int_hook(inode_getattr, 0, path); |
| } |
| |
| int security_inode_setxattr(struct user_namespace *mnt_userns, |
| struct dentry *dentry, const char *name, |
| const void *value, size_t size, int flags) |
| { |
| int ret; |
| |
| if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
| return 0; |
| /* |
| * SELinux and Smack integrate the cap call, |
| * so assume that all LSMs supplying this call do so. |
| */ |
| ret = call_int_hook(inode_setxattr, 1, mnt_userns, dentry, name, value, |
| size, flags); |
| |
| if (ret == 1) |
| ret = cap_inode_setxattr(dentry, name, value, size, flags); |
| if (ret) |
| return ret; |
| ret = ima_inode_setxattr(dentry, name, value, size); |
| if (ret) |
| return ret; |
| return evm_inode_setxattr(mnt_userns, dentry, name, value, size); |
| } |
| |
| void security_inode_post_setxattr(struct dentry *dentry, const char *name, |
| const void *value, size_t size, int flags) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
| return; |
| call_void_hook(inode_post_setxattr, dentry, name, value, size, flags); |
| evm_inode_post_setxattr(dentry, name, value, size); |
| } |
| |
| int security_inode_getxattr(struct dentry *dentry, const char *name) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
| return 0; |
| return call_int_hook(inode_getxattr, 0, dentry, name); |
| } |
| |
| int security_inode_listxattr(struct dentry *dentry) |
| { |
| if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
| return 0; |
| return call_int_hook(inode_listxattr, 0, dentry); |
| } |
| |
| int security_inode_removexattr(struct user_namespace *mnt_userns, |
| struct dentry *dentry, const char *name) |
| { |
| int ret; |
| |
| if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) |
| return 0; |
| /* |
| * SELinux and Smack integrate the cap call, |
| * so assume that all LSMs supplying this call do so. |
| */ |
| ret = call_int_hook(inode_removexattr, 1, mnt_userns, dentry, name); |
| if (ret == 1) |
| ret = cap_inode_removexattr(mnt_userns, dentry, name); |
| if (ret) |
| return ret; |
| ret = ima_inode_removexattr(dentry, name); |
| if (ret) |
| return ret; |
| return evm_inode_removexattr(mnt_userns, dentry, name); |
| } |
| |
| int security_inode_need_killpriv(struct dentry *dentry) |
| { |
| return call_int_hook(inode_need_killpriv, 0, dentry); |
| } |
| |
| int security_inode_killpriv(struct user_namespace *mnt_userns, |
| struct dentry *dentry) |
| { |
| return call_int_hook(inode_killpriv, 0, mnt_userns, dentry); |
| } |
| |
| int security_inode_getsecurity(struct user_namespace *mnt_userns, |
| struct inode *inode, const char *name, |
| void **buffer, bool alloc) |
| { |
| struct security_hook_list *hp; |
| int rc; |
| |
| if (unlikely(IS_PRIVATE(inode))) |
| return LSM_RET_DEFAULT(inode_getsecurity); |
| /* |
| * Only one module will provide an attribute with a given name. |
| */ |
| hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) { |
| rc = hp->hook.inode_getsecurity(mnt_userns, inode, name, buffer, alloc); |
| if (rc != LSM_RET_DEFAULT(inode_getsecurity)) |
| return rc; |
| } |
| return LSM_RET_DEFAULT(inode_getsecurity); |
| } |
| |
| int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags) |
| { |
| struct security_hook_list *hp; |
| int rc; |
| |
| if (unlikely(IS_PRIVATE(inode))) |
| return LSM_RET_DEFAULT(inode_setsecurity); |
| /* |
| * Only one module will provide an attribute with a given name. |
| */ |
| hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) { |
| rc = hp->hook.inode_setsecurity(inode, name, value, size, |
| flags); |
| if (rc != LSM_RET_DEFAULT(inode_setsecurity)) |
| return rc; |
| } |
| return LSM_RET_DEFAULT(inode_setsecurity); |
| } |
| |
| int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size) |
| { |
| if (unlikely(IS_PRIVATE(inode))) |
| return 0; |
| return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size); |
| } |
| EXPORT_SYMBOL(security_inode_listsecurity); |
| |
| void security_inode_getsecid(struct inode *inode, u32 *secid) |
| { |
| call_void_hook(inode_getsecid, inode, secid); |
| } |
| |
| int security_inode_copy_up(struct dentry *src, struct cred **new) |
| { |
| return call_int_hook(inode_copy_up, 0, src, new); |
| } |
| EXPORT_SYMBOL(security_inode_copy_up); |
| |
| int security_inode_copy_up_xattr(const char *name) |
| { |
| struct security_hook_list *hp; |
| int rc; |
| |
| /* |
| * The implementation can return 0 (accept the xattr), 1 (discard the |
| * xattr), -EOPNOTSUPP if it does not know anything about the xattr or |
| * any other error code incase of an error. |
| */ |
| hlist_for_each_entry(hp, |
| &security_hook_heads.inode_copy_up_xattr, list) { |
| rc = hp->hook.inode_copy_up_xattr(name); |
| if (rc != LSM_RET_DEFAULT(inode_copy_up_xattr)) |
| return rc; |
| } |
| |
| return LSM_RET_DEFAULT(inode_copy_up_xattr); |
| } |
| EXPORT_SYMBOL(security_inode_copy_up_xattr); |
| |
| int security_kernfs_init_security(struct kernfs_node *kn_dir, |
| struct kernfs_node *kn) |
| { |
| return call_int_hook(kernfs_init_security, 0, kn_dir, kn); |
| } |
| |
| int security_file_permission(struct file *file, int mask) |
| { |
| int ret; |
| |
| ret = call_int_hook(file_permission, 0, file, mask); |
| if (ret) |
| return ret; |
| |
| return fsnotify_perm(file, mask); |
| } |
| |
| int security_file_alloc(struct file *file) |
| { |
| int rc = lsm_file_alloc(file); |
| |
| if (rc) |
| return rc; |
| rc = call_int_hook(file_alloc_security, 0, file); |
| if (unlikely(rc)) |
| security_file_free(file); |
| return rc; |
| } |
| |
| void security_file_free(struct file *file) |
| { |
| void *blob; |
| |
| call_void_hook(file_free_security, file); |
| |
| blob = file->f_security; |
| if (blob) { |
| file->f_security = NULL; |
| kmem_cache_free(lsm_file_cache, blob); |
| } |
| } |
| |
| int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| { |
| return call_int_hook(file_ioctl, 0, file, cmd, arg); |
| } |
| EXPORT_SYMBOL_GPL(security_file_ioctl); |
| |
| /** |
| * security_file_ioctl_compat() - Check if an ioctl is allowed in compat mode |
| * @file: associated file |
| * @cmd: ioctl cmd |
| * @arg: ioctl arguments |
| * |
| * Compat version of security_file_ioctl() that correctly handles 32-bit |
| * processes running on 64-bit kernels. |
| * |
| * Return: Returns 0 if permission is granted. |
| */ |
| int security_file_ioctl_compat(struct file *file, unsigned int cmd, |
| unsigned long arg) |
| { |
| return call_int_hook(file_ioctl_compat, 0, file, cmd, arg); |
| } |
| EXPORT_SYMBOL_GPL(security_file_ioctl_compat); |
| |
| static inline unsigned long mmap_prot(struct file *file, unsigned long prot) |
| { |
| /* |
| * Does we have PROT_READ and does the application expect |
| * it to imply PROT_EXEC? If not, nothing to talk about... |
| */ |
| if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ) |
| return prot; |
| if (!(current->personality & READ_IMPLIES_EXEC)) |
| return prot; |
| /* |
| * if that's an anonymous mapping, let it. |
| */ |
| if (!file) |
| return prot | PROT_EXEC; |
| /* |
| * ditto if it's not on noexec mount, except that on !MMU we need |
| * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case |
| */ |
| if (!path_noexec(&file->f_path)) { |
| #ifndef CONFIG_MMU |
| if (file->f_op->mmap_capabilities) { |
| unsigned caps = file->f_op->mmap_capabilities(file); |
| if (!(caps & NOMMU_MAP_EXEC)) |
| return prot; |
| } |
| #endif |
| return prot | PROT_EXEC; |
| } |
| /* anything on noexec mount won't get PROT_EXEC */ |
| return prot; |
| } |
| |
| int security_mmap_file(struct file *file, unsigned long prot, |
| unsigned long flags) |
| { |
| unsigned long prot_adj = mmap_prot(file, prot); |
| int ret; |
| |
| ret = call_int_hook(mmap_file, 0, file, prot, prot_adj, flags); |
| if (ret) |
| return ret; |
| return ima_file_mmap(file, prot, prot_adj, flags); |
| } |
| |
| int security_mmap_addr(unsigned long addr) |
| { |
| return call_int_hook(mmap_addr, 0, addr); |
| } |
| |
| int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, |
| unsigned long prot) |
| { |
| int ret; |
| |
| ret = call_int_hook(file_mprotect, 0, vma, reqprot, prot); |
| if (ret) |
| return ret; |
| return ima_file_mprotect(vma, prot); |
| } |
| |
| int security_file_lock(struct file *file, unsigned int cmd) |
| { |
| return call_int_hook(file_lock, 0, file, cmd); |
| } |
| |
| int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg) |
| { |
| return call_int_hook(file_fcntl, 0, file, cmd, arg); |
| } |
| |
| void security_file_set_fowner(struct file *file) |
| { |
| call_void_hook(file_set_fowner, file); |
| } |
| |
| int security_file_send_sigiotask(struct task_struct *tsk, |
| struct fown_struct *fown, int sig) |
| { |
| return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig); |
| } |
| |
| int security_file_receive(struct file *file) |
| { |
| return call_int_hook(file_receive, 0, file); |
| } |
| |
| int security_file_open(struct file *file) |
| { |
| int ret; |
| |
| ret = call_int_hook(file_open, 0, file); |
| if (ret) |
| return ret; |
| |
| return fsnotify_perm(file, MAY_OPEN); |
| } |
| |
| int security_task_alloc(struct task_struct *task, unsigned long clone_flags) |
| { |
| int rc = lsm_task_alloc(task); |
| |
| if (rc) |
| return rc; |
| rc = call_int_hook(task_alloc, 0, task, clone_flags); |
| if (unlikely(rc)) |
| security_task_free(task); |
| return rc; |
| } |
| |
| void security_task_free(struct task_struct *task) |
| { |
| call_void_hook(task_free, task); |
| |
| kfree(task->security); |
| task->security = NULL; |
| } |
| |
| int security_cred_alloc_blank(struct cred *cred, gfp_t gfp) |
| { |
| int rc = lsm_cred_alloc(cred, gfp); |
| |
| if (rc) |
| return rc; |
| |
| rc = call_int_hook(cred_alloc_blank, 0, cred, gfp); |
| if (unlikely(rc)) |
| security_cred_free(cred); |
| return rc; |
| } |
| |
| void security_cred_free(struct cred *cred) |
| { |
| /* |
| * There is a failure case in prepare_creds() that |
| * may result in a call here with ->security being NULL. |
| */ |
| if (unlikely(cred->security == NULL)) |
| return; |
| |
| call_void_hook(cred_free, cred); |
| |
| kfree(cred->security); |
| cred->security = NULL; |
| } |
| |
| int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp) |
| { |
| int rc = lsm_cred_alloc(new, gfp); |
| |
| if (rc) |
| return rc; |
| |
| rc = call_int_hook(cred_prepare, 0, new, old, gfp); |
| if (unlikely(rc)) |
| security_cred_free(new); |
| return rc; |
| } |
| |
| void security_transfer_creds(struct cred *new, const struct cred *old) |
| { |
| call_void_hook(cred_transfer, new, old); |
| } |
| |
| void security_cred_getsecid(const struct cred *c, u32 *secid) |
| { |
| *secid = 0; |
| call_void_hook(cred_getsecid, c, secid); |
| } |
| EXPORT_SYMBOL(security_cred_getsecid); |
| |
| int security_kernel_act_as(struct cred *new, u32 secid) |
| { |
| return call_int_hook(kernel_act_as, 0, new, secid); |
| } |
| |
| int security_kernel_create_files_as(struct cred *new, struct inode *inode) |
| { |
| return call_int_hook(kernel_create_files_as, 0, new, inode); |
| } |
| |
| int security_kernel_module_request(char *kmod_name) |
| { |
| int ret; |
| |
| ret = call_int_hook(kernel_module_request, 0, kmod_name); |
| if (ret) |
| return ret; |
| return integrity_kernel_module_request(kmod_name); |
| } |
| |
| int security_kernel_read_file(struct file *file, enum kernel_read_file_id id, |
| bool contents) |
| { |
| int ret; |
| |
| ret = call_int_hook(kernel_read_file, 0, file, id, contents); |
| if (ret) |
| return ret; |
| return ima_read_file(file, id, contents); |
| } |
| EXPORT_SYMBOL_GPL(security_kernel_read_file); |
| |
| int security_kernel_post_read_file(struct file *file, char *buf, loff_t size, |
| enum kernel_read_file_id id) |
| { |
| int ret; |
| |
| ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id); |
| if (ret) |
| return ret; |
| return ima_post_read_file(file, buf, size, id); |
| } |
| EXPORT_SYMBOL_GPL(security_kernel_post_read_file); |
| |
| int security_kernel_load_data(enum kernel_load_data_id id, bool contents) |
| { |
| int ret; |
| |
| ret = call_int_hook(kernel_load_data, 0, id, contents); |
| if (ret) |
| return ret; |
| return ima_load_data(id, contents); |
| } |
| EXPORT_SYMBOL_GPL(security_kernel_load_data); |
| |
| int security_kernel_post_load_data(char *buf, loff_t size, |
| enum kernel_load_data_id id, |
| char *description) |
| { |
| int ret; |
| |
| ret = call_int_hook(kernel_post_load_data, 0, buf, size, id, |
| description); |
| if (ret) |
| return ret; |
| return ima_post_load_data(buf, size, id, description); |
| } |
| EXPORT_SYMBOL_GPL(security_kernel_post_load_data); |
| |
| int security_task_fix_setuid(struct cred *new, const struct cred *old, |
| int flags) |
| { |
| return call_int_hook(task_fix_setuid, 0, new, old, flags); |
| } |
| |
| int security_task_fix_setgid(struct cred *new, const struct cred *old, |
| int flags) |
| { |
| return call_int_hook(task_fix_setgid, 0, new, old, flags); |
| } |
| |
| int security_task_setpgid(struct task_struct *p, pid_t pgid) |
| { |
| return call_int_hook(task_setpgid, 0, p, pgid); |
| } |
| |
| int security_task_getpgid(struct task_struct *p) |
| { |
| return call_int_hook(task_getpgid, 0, p); |
| } |
| |
| int security_task_getsid(struct task_struct *p) |
| { |
| return call_int_hook(task_getsid, 0, p); |
| } |
| |
| void security_task_getsecid_subj(struct task_struct *p, u32 *secid) |
| { |
| *secid = 0; |
| call_void_hook(task_getsecid_subj, p, secid); |
| } |
| EXPORT_SYMBOL(security_task_getsecid_subj); |
| |
| void security_task_getsecid_obj(struct task_struct *p, u32 *secid) |
| { |
| *secid = 0; |
| call_void_hook(task_getsecid_obj, p, secid); |
| } |
| EXPORT_SYMBOL(security_task_getsecid_obj); |
| |
| int security_task_setnice(struct task_struct *p, int nice) |
| { |
| return call_int_hook(task_setnice, 0, p, nice); |
| } |
| |
| int security_task_setioprio(struct task_struct *p, int ioprio) |
| { |
| return call_int_hook(task_setioprio, 0, p, ioprio); |
| } |
| |
| int security_task_getioprio(struct task_struct *p) |
| { |
| return call_int_hook(task_getioprio, 0, p); |
| } |
| |
| int security_task_prlimit(const struct cred *cred, const struct cred *tcred, |
| unsigned int flags) |
| { |
| return call_int_hook(task_prlimit, 0, cred, tcred, flags); |
| } |
| |
| int security_task_setrlimit(struct task_struct *p, unsigned int resource, |
| struct rlimit *new_rlim) |
| { |
| return call_int_hook(task_setrlimit, 0, p, resource, new_rlim); |
| } |
| |
| int security_task_setscheduler(struct task_struct *p) |
| { |
| return call_int_hook(task_setscheduler, 0, p); |
| } |
| |
| int security_task_getscheduler(struct task_struct *p) |
| { |
| return call_int_hook(task_getscheduler, 0, p); |
| } |
| |
| int security_task_movememory(struct task_struct *p) |
| { |
| return call_int_hook(task_movememory, 0, p); |
| } |
| |
| int security_task_kill(struct task_struct *p, struct kernel_siginfo *info, |
| int sig, const struct cred *cred) |
| { |
| return call_int_hook(task_kill, 0, p, info, sig, cred); |
| } |
| |
| int security_task_prctl(int option, unsigned long arg2, unsigned long arg3, |
| unsigned long arg4, unsigned long arg5) |
| { |
| int thisrc; |
| int rc = LSM_RET_DEFAULT(task_prctl); |
| struct security_hook_list *hp; |
| |
| hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) { |
| thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5); |
| if (thisrc != LSM_RET_DEFAULT(task_prctl)) { |
| rc = thisrc; |
| if (thisrc != 0) |
| break; |
| } |
| } |
| return rc; |
| } |
| |
| void security_task_to_inode(struct task_struct *p, struct inode *inode) |
| { |
| call_void_hook(task_to_inode, p, inode); |
| } |
| |
| int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag) |
| { |
| return call_int_hook(ipc_permission, 0, ipcp, flag); |
| } |
| |
| void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid) |
| { |
| *secid = 0; |
| call_void_hook(ipc_getsecid, ipcp, secid); |
| } |
| |
| int security_msg_msg_alloc(struct msg_msg *msg) |
| { |
| int rc = lsm_msg_msg_alloc(msg); |
| |
| if (unlikely(rc)) |
| return rc; |
| rc = call_int_hook(msg_msg_alloc_security, 0, msg); |
| if (unlikely(rc)) |
| security_msg_msg_free(msg); |
| return rc; |
| } |
| |
| void security_msg_msg_free(struct msg_msg *msg) |
| { |
| call_void_hook(msg_msg_free_security, msg); |
| kfree(msg->security); |
| msg->security = NULL; |
| } |
| |
| int security_msg_queue_alloc(struct kern_ipc_perm *msq) |
| { |
| int rc = lsm_ipc_alloc(msq); |
| |
| if (unlikely(rc)) |
| return rc; |
| rc = call_int_hook(msg_queue_alloc_security, 0, msq); |
| if (unlikely(rc)) |
| security_msg_queue_free(msq); |
| return rc; |
| } |
| |
| void security_msg_queue_free(struct kern_ipc_perm *msq) |
| { |
| call_void_hook(msg_queue_free_security, msq); |
| kfree(msq->security); |
| msq->security = NULL; |
| } |
| |
| int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg) |
| { |
| return call_int_hook(msg_queue_associate, 0, msq, msqflg); |
| } |
| |
| int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd) |
| { |
| return call_int_hook(msg_queue_msgctl, 0, msq, cmd); |
| } |
| |
| int security_msg_queue_msgsnd(struct kern_ipc_perm *msq, |
| struct msg_msg *msg, int msqflg) |
| { |
| return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg); |
| } |
| |
| int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg, |
| struct task_struct *target, long type, int mode) |
| { |
| return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode); |
| } |
| |
| int security_shm_alloc(struct kern_ipc_perm *shp) |
| { |
| int rc = lsm_ipc_alloc(shp); |
| |
| if (unlikely(rc)) |
| return rc; |
| rc = call_int_hook(shm_alloc_security, 0, shp); |
| if (unlikely(rc)) |
| security_shm_free(shp); |
| return rc; |
| } |
| |
| void security_shm_free(struct kern_ipc_perm *shp) |
| { |
| call_void_hook(shm_free_security, shp); |
| kfree(shp->security); |
| shp->security = NULL; |
| } |
| |
| int security_shm_associate(struct kern_ipc_perm *shp, int shmflg) |
| { |
| return call_int_hook(shm_associate, 0, shp, shmflg); |
| } |
| |
| int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd) |
| { |
| return call_int_hook(shm_shmctl, 0, shp, cmd); |
| } |
| |
| int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg) |
| { |
| return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg); |
| } |
| |
| int security_sem_alloc(struct kern_ipc_perm *sma) |
| { |
| int rc = lsm_ipc_alloc(sma); |
| |
| if (unlikely(rc)) |
| return rc; |
| rc = call_int_hook(sem_alloc_security, 0, sma); |
| if (unlikely(rc)) |
| security_sem_free(sma); |
| return rc; |
| } |
| |
| void security_sem_free(struct kern_ipc_perm *sma) |
| { |
| call_void_hook(sem_free_security, sma); |
| kfree(sma->security); |
| sma->security = NULL; |
| } |
| |
| int security_sem_associate(struct kern_ipc_perm *sma, int semflg) |
| { |
| return call_int_hook(sem_associate, 0, sma, semflg); |
| } |
| |
| int security_sem_semctl(struct kern_ipc_perm *sma, int cmd) |
| { |
| return call_int_hook(sem_semctl, 0, sma, cmd); |
| } |
| |
| int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops, |
| unsigned nsops, int alter) |
| { |
| return call_int_hook(sem_semop, 0, sma, sops, nsops, alter); |
| } |
| |
| void security_d_instantiate(struct dentry *dentry, struct inode *inode) |
| { |
| if (unlikely(inode && IS_PRIVATE(inode))) |
| return; |
| call_void_hook(d_instantiate, dentry, inode); |
| } |
| EXPORT_SYMBOL(security_d_instantiate); |
| |
| int security_getprocattr(struct task_struct *p, const char *lsm, char *name, |
| char **value) |
| { |
| struct security_hook_list *hp; |
| |
| hlist_for_each_entry(hp, &security_hook_heads.getprocattr, list) { |
| if (lsm != NULL && strcmp(lsm, hp->lsm)) |
| continue; |
| return hp->hook.getprocattr(p, name, value); |
| } |
| return LSM_RET_DEFAULT(getprocattr); |
| } |
| |
| int security_setprocattr(const char *lsm, const char *name, void *value, |
| size_t size) |
| { |
| struct security_hook_list *hp; |
| |
| hlist_for_each_entry(hp, &security_hook_heads.setprocattr, list) { |
| if (lsm != NULL && strcmp(lsm, hp->lsm)) |
| continue; |
| return hp->hook.setprocattr(name, value, size); |
| } |
| return LSM_RET_DEFAULT(setprocattr); |
| } |
| |
| int security_netlink_send(struct sock *sk, struct sk_buff *skb) |
| { |
| return call_int_hook(netlink_send, 0, sk, skb); |
| } |
| |
| int security_ismaclabel(const char *name) |
| { |
| return call_int_hook(ismaclabel, 0, name); |
| } |
| EXPORT_SYMBOL(security_ismaclabel); |
| |
| int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen) |
| { |
| struct security_hook_list *hp; |
| int rc; |
| |
| /* |
| * Currently, only one LSM can implement secid_to_secctx (i.e this |
| * LSM hook is not "stackable"). |
| */ |
| hlist_for_each_entry(hp, &security_hook_heads.secid_to_secctx, list) { |
| rc = hp->hook.secid_to_secctx(secid, secdata, seclen); |
| if (rc != LSM_RET_DEFAULT(secid_to_secctx)) |
| return rc; |
| } |
| |
| return LSM_RET_DEFAULT(secid_to_secctx); |
| } |
| EXPORT_SYMBOL(security_secid_to_secctx); |
| |
| int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid) |
| { |
| *secid = 0; |
| return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid); |
| } |
| EXPORT_SYMBOL(security_secctx_to_secid); |
| |
| void security_release_secctx(char *secdata, u32 seclen) |
| { |
| call_void_hook(release_secctx, secdata, seclen); |
| } |
| EXPORT_SYMBOL(security_release_secctx); |
| |
| void security_inode_invalidate_secctx(struct inode *inode) |
| { |
| call_void_hook(inode_invalidate_secctx, inode); |
| } |
| EXPORT_SYMBOL(security_inode_invalidate_secctx); |
| |
| int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen) |
| { |
| return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen); |
| } |
| EXPORT_SYMBOL(security_inode_notifysecctx); |
| |
| int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen) |
| { |
| return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen); |
| } |
| EXPORT_SYMBOL(security_inode_setsecctx); |
| |
| int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen) |
| { |
| struct security_hook_list *hp; |
| int rc; |
| |
| /* |
| * Only one module will provide a security context. |
| */ |
| hlist_for_each_entry(hp, &security_hook_heads.inode_getsecctx, list) { |
| rc = hp->hook.inode_getsecctx(inode, ctx, ctxlen); |
| if (rc != LSM_RET_DEFAULT(inode_getsecctx)) |
| return rc; |
| } |
| |
| return LSM_RET_DEFAULT(inode_getsecctx); |
| } |
| EXPORT_SYMBOL(security_inode_getsecctx); |
| |
| #ifdef CONFIG_WATCH_QUEUE |
| int security_post_notification(const struct cred *w_cred, |
| const struct cred *cred, |
| struct watch_notification *n) |
| { |
| return call_int_hook(post_notification, 0, w_cred, cred, n); |
| } |
| #endif /* CONFIG_WATCH_QUEUE */ |
| |
| #ifdef CONFIG_KEY_NOTIFICATIONS |
| int security_watch_key(struct key *key) |
| { |
| return call_int_hook(watch_key, 0, key); |
| } |
| #endif |
| |
| #ifdef CONFIG_SECURITY_NETWORK |
| |
| int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk) |
| { |
| return call_int_hook(unix_stream_connect, 0, sock, other, newsk); |
| } |
| EXPORT_SYMBOL(security_unix_stream_connect); |
| |
| int security_unix_may_send(struct socket *sock, struct socket *other) |
| { |
| return call_int_hook(unix_may_send, 0, sock, other); |
| } |
| EXPORT_SYMBOL(security_unix_may_send); |
| |
| int security_socket_create(int family, int type, int protocol, int kern) |
| { |
| return call_int_hook(socket_create, 0, family, type, protocol, kern); |
| } |
| |
| int security_socket_post_create(struct socket *sock, int family, |
| int type, int protocol, int kern) |
| { |
| return call_int_hook(socket_post_create, 0, sock, family, type, |
| protocol, kern); |
| } |
| |
| int security_socket_socketpair(struct socket *socka, struct socket *sockb) |
| { |
| return call_int_hook(socket_socketpair, 0, socka, sockb); |
| } |
| EXPORT_SYMBOL(security_socket_socketpair); |
| |
| int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen) |
| { |
| return call_int_hook(socket_bind, 0, sock, address, addrlen); |
| } |
| |
| int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen) |
| { |
| return call_int_hook(socket_connect, 0, sock, address, addrlen); |
| } |
| |
| int security_socket_listen(struct socket *sock, int backlog) |
| { |
| return call_int_hook(socket_listen, 0, sock, backlog); |
| } |
| |
| int security_socket_accept(struct socket *sock, struct socket *newsock) |
| { |
| return call_int_hook(socket_accept, 0, sock, newsock); |
| } |
| |
| int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size) |
| { |
| return call_int_hook(socket_sendmsg, 0, sock, msg, size); |
| } |
| |
| int security_socket_recvmsg(struct socket *sock, struct msghdr *msg, |
| int size, int flags) |
| { |
| return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags); |
| } |
| |
| int security_socket_getsockname(struct socket *sock) |
| { |
| return call_int_hook(socket_getsockname, 0, sock); |
| } |
| |
| int security_socket_getpeername(struct socket *sock) |
| { |
| return call_int_hook(socket_getpeername, 0, sock); |
| } |
| |
| int security_socket_getsockopt(struct socket *sock, int level, int optname) |
| { |
| return call_int_hook(socket_getsockopt, 0, sock, level, optname); |
| } |
| |
| int security_socket_setsockopt(struct socket *sock, int level, int optname) |
| { |
| return call_int_hook(socket_setsockopt, 0, sock, level, optname); |
| } |
| |
| int security_socket_shutdown(struct socket *sock, int how) |
| { |
| return call_int_hook(socket_shutdown, 0, sock, how); |
| } |
| |
| int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) |
| { |
| return call_int_hook(socket_sock_rcv_skb, 0, sk, skb); |
| } |
| EXPORT_SYMBOL(security_sock_rcv_skb); |
| |
| int security_socket_getpeersec_stream(struct socket *sock, char __user *optval, |
| int __user *optlen, unsigned len) |
| { |
| return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock, |
| optval, optlen, len); |
| } |
| |
| int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid) |
| { |
| return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock, |
| skb, secid); |
| } |
| EXPORT_SYMBOL(security_socket_getpeersec_dgram); |
| |
| int security_sk_alloc(struct sock *sk, int family, gfp_t priority) |
| { |
| return call_int_hook(sk_alloc_security, 0, sk, family, priority); |
| } |
| |
| void security_sk_free(struct sock *sk) |
| { |
| call_void_hook(sk_free_security, sk); |
| } |
| |
| void security_sk_clone(const struct sock *sk, struct sock *newsk) |
| { |
| call_void_hook(sk_clone_security, sk, newsk); |
| } |
| EXPORT_SYMBOL(security_sk_clone); |
| |
| void security_sk_classify_flow(struct sock *sk, struct flowi_common *flic) |
| { |
| call_void_hook(sk_getsecid, sk, &flic->flowic_secid); |
| } |
| EXPORT_SYMBOL(security_sk_classify_flow); |
| |
| void security_req_classify_flow(const struct request_sock *req, |
| struct flowi_common *flic) |
| { |
| call_void_hook(req_classify_flow, req, flic); |
| } |
| EXPORT_SYMBOL(security_req_classify_flow); |
| |
| void security_sock_graft(struct sock *sk, struct socket *parent) |
| { |
| call_void_hook(sock_graft, sk, parent); |
| } |
| EXPORT_SYMBOL(security_sock_graft); |
| |
| int security_inet_conn_request(const struct sock *sk, |
| struct sk_buff *skb, struct request_sock *req) |
| { |
| return call_int_hook(inet_conn_request, 0, sk, skb, req); |
| } |
| EXPORT_SYMBOL(security_inet_conn_request); |
| |
| void security_inet_csk_clone(struct sock *newsk, |
| const struct request_sock *req) |
| { |
| call_void_hook(inet_csk_clone, newsk, req); |
| } |
| |
| void security_inet_conn_established(struct sock *sk, |
| struct sk_buff *skb) |
| { |
| call_void_hook(inet_conn_established, sk, skb); |
| } |
| EXPORT_SYMBOL(security_inet_conn_established); |
| |
| int security_secmark_relabel_packet(u32 secid) |
| { |
| return call_int_hook(secmark_relabel_packet, 0, secid); |
| } |
| EXPORT_SYMBOL(security_secmark_relabel_packet); |
| |
| void security_secmark_refcount_inc(void) |
| { |
| call_void_hook(secmark_refcount_inc); |
| } |
| EXPORT_SYMBOL(security_secmark_refcount_inc); |
| |
| void security_secmark_refcount_dec(void) |
| { |
| call_void_hook(secmark_refcount_dec); |
| } |
| EXPORT_SYMBOL(security_secmark_refcount_dec); |
| |
| int security_tun_dev_alloc_security(void **security) |
| { |
| return call_int_hook(tun_dev_alloc_security, 0, security); |
| } |
| EXPORT_SYMBOL(security_tun_dev_alloc_security); |
| |
| void security_tun_dev_free_security(void *security) |
| { |
| call_void_hook(tun_dev_free_security, security); |
| } |
| EXPORT_SYMBOL(security_tun_dev_free_security); |
| |
| int security_tun_dev_create(void) |
| { |
| return call_int_hook(tun_dev_create, 0); |
| } |
| EXPORT_SYMBOL(security_tun_dev_create); |
| |
| int security_tun_dev_attach_queue(void *security) |
| { |
| return call_int_hook(tun_dev_attach_queue, 0, security); |
| } |
| EXPORT_SYMBOL(security_tun_dev_attach_queue); |
| |
| int security_tun_dev_attach(struct sock *sk, void *security) |
| { |
| return call_int_hook(tun_dev_attach, 0, sk, security); |
| } |
| EXPORT_SYMBOL(security_tun_dev_attach); |
| |
| int security_tun_dev_open(void *security) |
| { |
| return call_int_hook(tun_dev_open, 0, security); |
| } |
| EXPORT_SYMBOL(security_tun_dev_open); |
| |
| int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb) |
| { |
| return call_int_hook(sctp_assoc_request, 0, ep, skb); |
| } |
| EXPORT_SYMBOL(security_sctp_assoc_request); |
| |
| int security_sctp_bind_connect(struct sock *sk, int optname, |
| struct sockaddr *address, int addrlen) |
| { |
| return call_int_hook(sctp_bind_connect, 0, sk, optname, |
| address, addrlen); |
| } |
| EXPORT_SYMBOL(security_sctp_bind_connect); |
| |
| void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk, |
| struct sock *newsk) |
| { |
| call_void_hook(sctp_sk_clone, ep, sk, newsk); |
| } |
| EXPORT_SYMBOL(security_sctp_sk_clone); |
| |
| #endif /* CONFIG_SECURITY_NETWORK */ |
| |
| #ifdef CONFIG_SECURITY_INFINIBAND |
| |
| int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey) |
| { |
| return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey); |
| } |
| EXPORT_SYMBOL(security_ib_pkey_access); |
| |
| int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num) |
| { |
| return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num); |
| } |
| EXPORT_SYMBOL(security_ib_endport_manage_subnet); |
| |
| int security_ib_alloc_security(void **sec) |
| { |
| return call_int_hook(ib_alloc_security, 0, sec); |
| } |
| EXPORT_SYMBOL(security_ib_alloc_security); |
| |
| void security_ib_free_security(void *sec) |
| { |
| call_void_hook(ib_free_security, sec); |
| } |
| EXPORT_SYMBOL(security_ib_free_security); |
| #endif /* CONFIG_SECURITY_INFINIBAND */ |
| |
| #ifdef CONFIG_SECURITY_NETWORK_XFRM |
| |
| int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, |
| struct xfrm_user_sec_ctx *sec_ctx, |
| gfp_t gfp) |
| { |
| return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp); |
| } |
| EXPORT_SYMBOL(security_xfrm_policy_alloc); |
| |
| int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx, |
| struct xfrm_sec_ctx **new_ctxp) |
| { |
| return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp); |
| } |
| |
| void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx) |
| { |
| call_void_hook(xfrm_policy_free_security, ctx); |
| } |
| EXPORT_SYMBOL(security_xfrm_policy_free); |
| |
| int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx) |
| { |
| return call_int_hook(xfrm_policy_delete_security, 0, ctx); |
| } |
| |
| int security_xfrm_state_alloc(struct xfrm_state *x, |
| struct xfrm_user_sec_ctx *sec_ctx) |
| { |
| return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx); |
| } |
| EXPORT_SYMBOL(security_xfrm_state_alloc); |
| |
| int security_xfrm_state_alloc_acquire(struct xfrm_state *x, |
| struct xfrm_sec_ctx *polsec, u32 secid) |
| { |
| return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid); |
| } |
| |
| int security_xfrm_state_delete(struct xfrm_state *x) |
| { |
| return call_int_hook(xfrm_state_delete_security, 0, x); |
| } |
| EXPORT_SYMBOL(security_xfrm_state_delete); |
| |
| void security_xfrm_state_free(struct xfrm_state *x) |
| { |
| call_void_hook(xfrm_state_free_security, x); |
| } |
| |
| int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid) |
| { |
| return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid); |
| } |
| |
| int security_xfrm_state_pol_flow_match(struct xfrm_state *x, |
| struct xfrm_policy *xp, |
| const struct flowi_common *flic) |
| { |
| struct security_hook_list *hp; |
| int rc = LSM_RET_DEFAULT(xfrm_state_pol_flow_match); |
| |
| /* |
| * Since this function is expected to return 0 or 1, the judgment |
| * becomes difficult if multiple LSMs supply this call. Fortunately, |
| * we can use the first LSM's judgment because currently only SELinux |
| * supplies this call. |
| * |
| * For speed optimization, we explicitly break the loop rather than |
| * using the macro |
| */ |
| hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match, |
| list) { |
| rc = hp->hook.xfrm_state_pol_flow_match(x, xp, flic); |
| break; |
| } |
| return rc; |
| } |
| |
| int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid) |
| { |
| return call_int_hook(xfrm_decode_session, 0, skb, secid, 1); |
| } |
| |
| void security_skb_classify_flow(struct sk_buff *skb, struct flowi_common *flic) |
| { |
| int rc = call_int_hook(xfrm_decode_session, 0, skb, &flic->flowic_secid, |
| 0); |
| |
| BUG_ON(rc); |
| } |
| EXPORT_SYMBOL(security_skb_classify_flow); |
| |
| #endif /* CONFIG_SECURITY_NETWORK_XFRM */ |
| |
| #ifdef CONFIG_KEYS |
| |
| int security_key_alloc(struct key *key, const struct cred *cred, |
| unsigned long flags) |
| { |
| return call_int_hook(key_alloc, 0, key, cred, flags); |
| } |
| |
| void security_key_free(struct key *key) |
| { |
| call_void_hook(key_free, key); |
| } |
| |
| int security_key_permission(key_ref_t key_ref, const struct cred *cred, |
| enum key_need_perm need_perm) |
| { |
| return call_int_hook(key_permission, 0, key_ref, cred, need_perm); |
| } |
| |
| int security_key_getsecurity(struct key *key, char **_buffer) |
| { |
| *_buffer = NULL; |
| return call_int_hook(key_getsecurity, 0, key, _buffer); |
| } |
| |
| #endif /* CONFIG_KEYS */ |
| |
| #ifdef CONFIG_AUDIT |
| |
| int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule) |
| { |
| return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule); |
| } |
| |
| int security_audit_rule_known(struct audit_krule *krule) |
| { |
| return call_int_hook(audit_rule_known, 0, krule); |
| } |
| |
| void security_audit_rule_free(void *lsmrule) |
| { |
| call_void_hook(audit_rule_free, lsmrule); |
| } |
| |
| int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule) |
| { |
| return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule); |
| } |
| #endif /* CONFIG_AUDIT */ |
| |
| #ifdef CONFIG_BPF_SYSCALL |
| int security_bpf(int cmd, union bpf_attr *attr, unsigned int size) |
| { |
| return call_int_hook(bpf, 0, cmd, attr, size); |
| } |
| int security_bpf_map(struct bpf_map *map, fmode_t fmode) |
| { |
| return call_int_hook(bpf_map, 0, map, fmode); |
| } |
| int security_bpf_prog(struct bpf_prog *prog) |
| { |
| return call_int_hook(bpf_prog, 0, prog); |
| } |
| int security_bpf_map_alloc(struct bpf_map *map) |
| { |
| return call_int_hook(bpf_map_alloc_security, 0, map); |
| } |
| int security_bpf_prog_alloc(struct bpf_prog_aux *aux) |
| { |
| return call_int_hook(bpf_prog_alloc_security, 0, aux); |
| } |
| void security_bpf_map_free(struct bpf_map *map) |
| { |
| call_void_hook(bpf_map_free_security, map); |
| } |
| void security_bpf_prog_free(struct bpf_prog_aux *aux) |
| { |
| call_void_hook(bpf_prog_free_security, aux); |
| } |
| #endif /* CONFIG_BPF_SYSCALL */ |
| |
| int security_locked_down(enum lockdown_reason what) |
| { |
| return call_int_hook(locked_down, 0, what); |
| } |
| EXPORT_SYMBOL(security_locked_down); |
| |
| #ifdef CONFIG_PERF_EVENTS |
| int security_perf_event_open(struct perf_event_attr *attr, int type) |
| { |
| return call_int_hook(perf_event_open, 0, attr, type); |
| } |
| |
| int security_perf_event_alloc(struct perf_event *event) |
| { |
| return call_int_hook(perf_event_alloc, 0, event); |
| } |
| |
| void security_perf_event_free(struct perf_event *event) |
| { |
| call_void_hook(perf_event_free, event); |
| } |
| |
| int security_perf_event_read(struct perf_event *event) |
| { |
| return call_int_hook(perf_event_read, 0, event); |
| } |
| |
| int security_perf_event_write(struct perf_event *event) |
| { |
| return call_int_hook(perf_event_write, 0, event); |
| } |
| #endif /* CONFIG_PERF_EVENTS */ |