diff options
| -rw-r--r-- | fs/attr.c | 2 | ||||
| -rw-r--r-- | fs/namei.c | 4 | ||||
| -rw-r--r-- | include/linux/ima.h | 18 | ||||
| -rw-r--r-- | security/integrity/ima/ima.h | 19 | ||||
| -rw-r--r-- | security/integrity/ima/ima_api.c | 10 | ||||
| -rw-r--r-- | security/integrity/ima/ima_appraise.c | 15 | ||||
| -rw-r--r-- | security/integrity/ima/ima_asymmetric_keys.c | 3 | ||||
| -rw-r--r-- | security/integrity/ima/ima_main.c | 37 | ||||
| -rw-r--r-- | security/integrity/ima/ima_policy.c | 20 | ||||
| -rw-r--r-- | security/integrity/ima/ima_queue_keys.c | 4 |
10 files changed, 83 insertions, 49 deletions
diff --git a/fs/attr.c b/fs/attr.c index 41abd0d973d8..87ef39db1c34 100644 --- a/fs/attr.c +++ b/fs/attr.c @@ -401,7 +401,7 @@ int notify_change(struct user_namespace *mnt_userns, struct dentry *dentry, if (!error) { fsnotify_change(dentry, ia_valid); - ima_inode_post_setattr(dentry); + ima_inode_post_setattr(mnt_userns, dentry); evm_inode_post_setattr(dentry, ia_valid); } diff --git a/fs/namei.c b/fs/namei.c index d9ceb75ac169..dbf53b325ac9 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -3422,7 +3422,7 @@ struct dentry *vfs_tmpfile(struct user_namespace *mnt_userns, inode->i_state |= I_LINKABLE; spin_unlock(&inode->i_lock); } - ima_post_create_tmpfile(inode); + ima_post_create_tmpfile(mnt_userns, inode); return child; out_err: @@ -3750,7 +3750,7 @@ retry: error = vfs_create(mnt_userns, path.dentry->d_inode, dentry, mode, true); if (!error) - ima_post_path_mknod(dentry); + ima_post_path_mknod(mnt_userns, dentry); break; case S_IFCHR: case S_IFBLK: error = vfs_mknod(mnt_userns, path.dentry->d_inode, diff --git a/include/linux/ima.h b/include/linux/ima.h index 7db9cca1af34..5486312d8ee6 100644 --- a/include/linux/ima.h +++ b/include/linux/ima.h @@ -16,7 +16,8 @@ struct linux_binprm; #ifdef CONFIG_IMA extern int ima_bprm_check(struct linux_binprm *bprm); extern int ima_file_check(struct file *file, int mask); -extern void ima_post_create_tmpfile(struct inode *inode); +extern void ima_post_create_tmpfile(struct user_namespace *mnt_userns, + struct inode *inode); extern void ima_file_free(struct file *file); extern int ima_file_mmap(struct file *file, unsigned long prot); extern int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot); @@ -27,7 +28,8 @@ extern int ima_read_file(struct file *file, enum kernel_read_file_id id, bool contents); extern int ima_post_read_file(struct file *file, void *buf, loff_t size, enum kernel_read_file_id id); -extern void ima_post_path_mknod(struct dentry *dentry); +extern void ima_post_path_mknod(struct user_namespace *mnt_userns, + struct dentry *dentry); extern int ima_file_hash(struct file *file, char *buf, size_t buf_size); extern int ima_inode_hash(struct inode *inode, char *buf, size_t buf_size); extern void ima_kexec_cmdline(int kernel_fd, const void *buf, int size); @@ -68,7 +70,8 @@ static inline int ima_file_check(struct file *file, int mask) return 0; } -static inline void ima_post_create_tmpfile(struct inode *inode) +static inline void ima_post_create_tmpfile(struct user_namespace *mnt_userns, + struct inode *inode) { } @@ -112,7 +115,8 @@ static inline int ima_post_read_file(struct file *file, void *buf, loff_t size, return 0; } -static inline void ima_post_path_mknod(struct dentry *dentry) +static inline void ima_post_path_mknod(struct user_namespace *mnt_userns, + struct dentry *dentry) { return; } @@ -153,7 +157,8 @@ static inline void ima_post_key_create_or_update(struct key *keyring, #ifdef CONFIG_IMA_APPRAISE extern bool is_ima_appraise_enabled(void); -extern void ima_inode_post_setattr(struct dentry *dentry); +extern void ima_inode_post_setattr(struct user_namespace *mnt_userns, + struct dentry *dentry); extern int ima_inode_setxattr(struct dentry *dentry, const char *xattr_name, const void *xattr_value, size_t xattr_value_len); extern int ima_inode_removexattr(struct dentry *dentry, const char *xattr_name); @@ -163,7 +168,8 @@ static inline bool is_ima_appraise_enabled(void) return 0; } -static inline void ima_inode_post_setattr(struct dentry *dentry) +static inline void ima_inode_post_setattr(struct user_namespace *mnt_userns, + struct dentry *dentry) { return; } diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h index 8e8b1e3cb847..b87c9006d577 100644 --- a/security/integrity/ima/ima.h +++ b/security/integrity/ima/ima.h @@ -253,8 +253,9 @@ static inline void ima_process_queued_keys(void) {} #endif /* CONFIG_IMA_QUEUE_EARLY_BOOT_KEYS */ /* LIM API function definitions */ -int ima_get_action(struct inode *inode, const struct cred *cred, u32 secid, - int mask, enum ima_hooks func, int *pcr, +int ima_get_action(struct user_namespace *mnt_userns, struct inode *inode, + const struct cred *cred, u32 secid, int mask, + enum ima_hooks func, int *pcr, struct ima_template_desc **template_desc, const char *keyring); int ima_must_measure(struct inode *inode, int mask, enum ima_hooks func); @@ -266,7 +267,8 @@ void ima_store_measurement(struct integrity_iint_cache *iint, struct file *file, struct evm_ima_xattr_data *xattr_value, int xattr_len, const struct modsig *modsig, int pcr, struct ima_template_desc *template_desc); -void process_buffer_measurement(struct inode *inode, const void *buf, int size, +void process_buffer_measurement(struct user_namespace *mnt_userns, + struct inode *inode, const void *buf, int size, const char *eventname, enum ima_hooks func, int pcr, const char *keyring); void ima_audit_measurement(struct integrity_iint_cache *iint, @@ -281,8 +283,9 @@ void ima_free_template_entry(struct ima_template_entry *entry); const char *ima_d_path(const struct path *path, char **pathbuf, char *filename); /* IMA policy related functions */ -int ima_match_policy(struct inode *inode, const struct cred *cred, u32 secid, - enum ima_hooks func, int mask, int flags, int *pcr, +int ima_match_policy(struct user_namespace *mnt_userns, struct inode *inode, + const struct cred *cred, u32 secid, enum ima_hooks func, + int mask, int flags, int *pcr, struct ima_template_desc **template_desc, const char *keyring); void ima_init_policy(void); @@ -313,7 +316,8 @@ int ima_appraise_measurement(enum ima_hooks func, struct file *file, const unsigned char *filename, struct evm_ima_xattr_data *xattr_value, int xattr_len, const struct modsig *modsig); -int ima_must_appraise(struct inode *inode, int mask, enum ima_hooks func); +int ima_must_appraise(struct user_namespace *mnt_userns, struct inode *inode, + int mask, enum ima_hooks func); void ima_update_xattr(struct integrity_iint_cache *iint, struct file *file); enum integrity_status ima_get_cache_status(struct integrity_iint_cache *iint, enum ima_hooks func); @@ -340,7 +344,8 @@ static inline int ima_appraise_measurement(enum ima_hooks func, return INTEGRITY_UNKNOWN; } -static inline int ima_must_appraise(struct inode *inode, int mask, +static inline int ima_must_appraise(struct user_namespace *mnt_userns, + struct inode *inode, int mask, enum ima_hooks func) { return 0; diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c index 4f39fb93f278..ed410efb3597 100644 --- a/security/integrity/ima/ima_api.c +++ b/security/integrity/ima/ima_api.c @@ -162,6 +162,7 @@ err_out: /** * ima_get_action - appraise & measure decision based on policy. + * @mnt_userns: user namespace of the mount the inode was found from * @inode: pointer to the inode associated with the object being validated * @cred: pointer to credentials structure to validate * @secid: secid of the task being validated @@ -183,8 +184,9 @@ err_out: * Returns IMA_MEASURE, IMA_APPRAISE mask. * */ -int ima_get_action(struct inode *inode, const struct cred *cred, u32 secid, - int mask, enum ima_hooks func, int *pcr, +int ima_get_action(struct user_namespace *mnt_userns, struct inode *inode, + const struct cred *cred, u32 secid, int mask, + enum ima_hooks func, int *pcr, struct ima_template_desc **template_desc, const char *keyring) { @@ -192,8 +194,8 @@ int ima_get_action(struct inode *inode, const struct cred *cred, u32 secid, flags &= ima_policy_flag; - return ima_match_policy(inode, cred, secid, func, mask, flags, pcr, - template_desc, keyring); + return ima_match_policy(mnt_userns, inode, cred, secid, func, mask, + flags, pcr, template_desc, keyring); } /* diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c index 70b643c41c6b..2e64b9f281cc 100644 --- a/security/integrity/ima/ima_appraise.c +++ b/security/integrity/ima/ima_appraise.c @@ -68,7 +68,8 @@ bool is_ima_appraise_enabled(void) * * Return 1 to appraise or hash */ -int ima_must_appraise(struct inode *inode, int mask, enum ima_hooks func) +int ima_must_appraise(struct user_namespace *mnt_userns, struct inode *inode, + int mask, enum ima_hooks func) { u32 secid; @@ -76,8 +77,8 @@ int ima_must_appraise(struct inode *inode, int mask, enum ima_hooks func) return 0; security_task_getsecid(current, &secid); - return ima_match_policy(inode, current_cred(), secid, func, mask, - IMA_APPRAISE | IMA_HASH, NULL, NULL, NULL); + return ima_match_policy(mnt_userns, inode, current_cred(), secid, func, + mask, IMA_APPRAISE | IMA_HASH, NULL, NULL, NULL); } static int ima_fix_xattr(struct dentry *dentry, @@ -350,7 +351,7 @@ int ima_check_blacklist(struct integrity_iint_cache *iint, rc = is_binary_blacklisted(digest, digestsize); if ((rc == -EPERM) && (iint->flags & IMA_MEASURE)) - process_buffer_measurement(NULL, digest, digestsize, + process_buffer_measurement(&init_user_ns, NULL, digest, digestsize, "blacklisted-hash", NONE, pcr, NULL); } @@ -501,6 +502,7 @@ void ima_update_xattr(struct integrity_iint_cache *iint, struct file *file) /** * ima_inode_post_setattr - reflect file metadata changes + * @mnt_userns: user namespace of the mount the inode was found from * @dentry: pointer to the affected dentry * * Changes to a dentry's metadata might result in needing to appraise. @@ -508,7 +510,8 @@ void ima_update_xattr(struct integrity_iint_cache *iint, struct file *file) * This function is called from notify_change(), which expects the caller * to lock the inode's i_mutex. */ -void ima_inode_post_setattr(struct dentry *dentry) +void ima_inode_post_setattr(struct user_namespace *mnt_userns, + struct dentry *dentry) { struct inode *inode = d_backing_inode(dentry); struct integrity_iint_cache *iint; @@ -518,7 +521,7 @@ void ima_inode_post_setattr(struct dentry *dentry) || !(inode->i_opflags & IOP_XATTR)) return; - action = ima_must_appraise(inode, MAY_ACCESS, POST_SETATTR); + action = ima_must_appraise(mnt_userns, inode, MAY_ACCESS, POST_SETATTR); if (!action) __vfs_removexattr(&init_user_ns, dentry, XATTR_NAME_IMA); iint = integrity_iint_find(inode); diff --git a/security/integrity/ima/ima_asymmetric_keys.c b/security/integrity/ima/ima_asymmetric_keys.c index 1c68c500c26f..c4ef69100789 100644 --- a/security/integrity/ima/ima_asymmetric_keys.c +++ b/security/integrity/ima/ima_asymmetric_keys.c @@ -10,6 +10,7 @@ */ #include <keys/asymmetric-type.h> +#include <linux/user_namespace.h> #include "ima.h" /** @@ -58,7 +59,7 @@ void ima_post_key_create_or_update(struct key *keyring, struct key *key, * if the IMA policy is configured to measure a key linked * to the given keyring. */ - process_buffer_measurement(NULL, payload, payload_len, + process_buffer_measurement(&init_user_ns, NULL, payload, payload_len, keyring->description, KEY_CHECK, 0, keyring->description); } diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index f87cb29329e9..cb1c56eccd6d 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -218,8 +218,8 @@ static int process_measurement(struct file *file, const struct cred *cred, * bitmask based on the appraise/audit/measurement policy. * Included is the appraise submask. */ - action = ima_get_action(inode, cred, secid, mask, func, &pcr, - &template_desc, NULL); + action = ima_get_action(file_mnt_user_ns(file), inode, cred, secid, + mask, func, &pcr, &template_desc, NULL); violation_check = ((func == FILE_CHECK || func == MMAP_CHECK) && (ima_policy_flag & IMA_MEASURE)); if (!action && !violation_check) @@ -431,8 +431,9 @@ int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot) security_task_getsecid(current, &secid); inode = file_inode(vma->vm_file); - action = ima_get_action(inode, current_cred(), secid, MAY_EXEC, - MMAP_CHECK, &pcr, &template, 0); + action = ima_get_action(file_mnt_user_ns(vma->vm_file), inode, + current_cred(), secid, MAY_EXEC, MMAP_CHECK, + &pcr, &template, 0); /* Is the mmap'ed file in policy? */ if (!(action & (IMA_MEASURE | IMA_APPRAISE_SUBMASK))) @@ -592,18 +593,21 @@ EXPORT_SYMBOL_GPL(ima_inode_hash); /** * ima_post_create_tmpfile - mark newly created tmpfile as new + * @mnt_userns: user namespace of the mount the inode was found from * @file : newly created tmpfile * * No measuring, appraising or auditing of newly created tmpfiles is needed. * Skip calling process_measurement(), but indicate which newly, created * tmpfiles are in policy. */ -void ima_post_create_tmpfile(struct inode *inode) +void ima_post_create_tmpfile(struct user_namespace *mnt_userns, + struct inode *inode) { struct integrity_iint_cache *iint; int must_appraise; - must_appraise = ima_must_appraise(inode, MAY_ACCESS, FILE_CHECK); + must_appraise = ima_must_appraise(mnt_userns, inode, MAY_ACCESS, + FILE_CHECK); if (!must_appraise) return; @@ -619,18 +623,21 @@ void ima_post_create_tmpfile(struct inode *inode) /** * ima_post_path_mknod - mark as a new inode + * @mnt_userns: user namespace of the mount the inode was found from * @dentry: newly created dentry * * Mark files created via the mknodat syscall as new, so that the * file data can be written later. */ -void ima_post_path_mknod(struct dentry *dentry) +void ima_post_path_mknod(struct user_namespace *mnt_userns, + struct dentry *dentry) { struct integrity_iint_cache *iint; struct inode *inode = dentry->d_inode; int must_appraise; - must_appraise = ima_must_appraise(inode, MAY_ACCESS, FILE_CHECK); + must_appraise = ima_must_appraise(mnt_userns, inode, MAY_ACCESS, + FILE_CHECK); if (!must_appraise) return; @@ -810,6 +817,7 @@ int ima_post_load_data(char *buf, loff_t size, /* * process_buffer_measurement - Measure the buffer to ima log. + * @mnt_userns: user namespace of the mount the inode was found from * @inode: inode associated with the object being measured (NULL for KEY_CHECK) * @buf: pointer to the buffer that needs to be added to the log. * @size: size of buffer(in bytes). @@ -820,7 +828,8 @@ int ima_post_load_data(char *buf, loff_t size, * * Based on policy, the buffer is measured into the ima log. */ -void process_buffer_measurement(struct inode *inode, const void *buf, int size, +void process_buffer_measurement(struct user_namespace *mnt_userns, + struct inode *inode, const void *buf, int size, const char *eventname, enum ima_hooks func, int pcr, const char *keyring) { @@ -860,8 +869,9 @@ void process_buffer_measurement(struct inode *inode, const void *buf, int size, */ if (func) { security_task_getsecid(current, &secid); - action = ima_get_action(inode, current_cred(), secid, 0, func, - &pcr, &template, keyring); + action = ima_get_action(mnt_userns, inode, current_cred(), + secid, 0, func, &pcr, &template, + keyring); if (!(action & IMA_MEASURE)) return; } @@ -919,8 +929,9 @@ void ima_kexec_cmdline(int kernel_fd, const void *buf, int size) if (!f.file) return; - process_buffer_measurement(file_inode(f.file), buf, size, - "kexec-cmdline", KEXEC_CMDLINE, 0, NULL); + process_buffer_measurement(file_mnt_user_ns(f.file), file_inode(f.file), + buf, size, "kexec-cmdline", KEXEC_CMDLINE, 0, + NULL); fdput(f); } diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c index 823a0c1379cb..e14426c24a19 100644 --- a/security/integrity/ima/ima_policy.c +++ b/security/integrity/ima/ima_policy.c @@ -488,6 +488,7 @@ static bool ima_match_keyring(struct ima_rule_entry *rule, /** * ima_match_rules - determine whether an inode matches the policy rule. * @rule: a pointer to a rule + * @mnt_userns: user namespace of the mount the inode was found from * @inode: a pointer to an inode * @cred: a pointer to a credentials structure for user validation * @secid: the secid of the task to be validated @@ -497,9 +498,10 @@ static bool ima_match_keyring(struct ima_rule_entry *rule, * * Returns true on rule match, false on failure. */ -static bool ima_match_rules(struct ima_rule_entry *rule, struct inode *inode, - const struct cred *cred, u32 secid, - enum ima_hooks func, int mask, +static bool ima_match_rules(struct ima_rule_entry *rule, + struct user_namespace *mnt_userns, + struct inode *inode, const struct cred *cred, + u32 secid, enum ima_hooks func, int mask, const char *keyring) { int i; @@ -539,7 +541,7 @@ static bool ima_match_rules(struct ima_rule_entry *rule, struct inode *inode, } if ((rule->flags & IMA_FOWNER) && - !rule->fowner_op(inode->i_uid, rule->fowner)) + !rule->fowner_op(i_uid_into_mnt(mnt_userns, inode), rule->fowner)) return false; for (i = 0; i < MAX_LSM_RULES; i++) { int rc = 0; @@ -602,6 +604,7 @@ static int get_subaction(struct ima_rule_entry *rule, enum ima_hooks func) /** * ima_match_policy - decision based on LSM and other conditions + * @mnt_userns: user namespace of the mount the inode was found from * @inode: pointer to an inode for which the policy decision is being made * @cred: pointer to a credentials structure for which the policy decision is * being made @@ -620,8 +623,9 @@ static int get_subaction(struct ima_rule_entry *rule, enum ima_hooks func) * list when walking it. Reads are many orders of magnitude more numerous * than writes so ima_match_policy() is classical RCU candidate. */ -int ima_match_policy(struct inode *inode, const struct cred *cred, u32 secid, - enum ima_hooks func, int mask, int flags, int *pcr, +int ima_match_policy(struct user_namespace *mnt_userns, struct inode *inode, + const struct cred *cred, u32 secid, enum ima_hooks func, + int mask, int flags, int *pcr, struct ima_template_desc **template_desc, const char *keyring) { @@ -637,8 +641,8 @@ int ima_match_policy(struct inode *inode, const struct cred *cred, u32 secid, if (!(entry->action & actmask)) continue; - if (!ima_match_rules(entry, inode, cred, secid, func, mask, - keyring)) + if (!ima_match_rules(entry, mnt_userns, inode, cred, secid, + func, mask, keyring)) continue; action |= entry->flags & IMA_ACTION_FLAGS; diff --git a/security/integrity/ima/ima_queue_keys.c b/security/integrity/ima/ima_queue_keys.c index 69a8626a35c0..ca3dea19da18 100644 --- a/security/integrity/ima/ima_queue_keys.c +++ b/security/integrity/ima/ima_queue_keys.c @@ -8,6 +8,7 @@ * Enables deferred processing of keys */ +#include <linux/user_namespace.h> #include <linux/workqueue.h> #include <keys/asymmetric-type.h> #include "ima.h" @@ -158,7 +159,8 @@ void ima_process_queued_keys(void) list_for_each_entry_safe(entry, tmp, &ima_keys, list) { if (!timer_expired) - process_buffer_measurement(NULL, entry->payload, + process_buffer_measurement(&init_user_ns, NULL, + entry->payload, entry->payload_len, entry->keyring_name, KEY_CHECK, 0, |