diff options
| -rw-r--r-- | include/linux/lsm_hooks.h | 14 | ||||
| -rw-r--r-- | include/linux/security.h | 10 | ||||
| -rw-r--r-- | security/security.c | 5 |
3 files changed, 29 insertions, 0 deletions
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h index 9a0bdf91e646..47ba4db4d8fb 100644 --- a/include/linux/lsm_hooks.h +++ b/include/linux/lsm_hooks.h @@ -76,6 +76,17 @@ * changes on the process such as clearing out non-inheritable signal * state. This is called immediately after commit_creds(). * + * Security hooks for mount using fs_context. + * [See also Documentation/filesystems/mounting.txt] + * + * @fs_context_parse_param: + * Userspace provided a parameter to configure a superblock. The LSM may + * reject it with an error and may use it for itself, in which case it + * should return 0; otherwise it should return -ENOPARAM to pass it on to + * the filesystem. + * @fc indicates the filesystem context. + * @param The parameter + * * Security hooks for filesystem operations. * * @sb_alloc_security: @@ -1459,6 +1470,8 @@ union security_list_options { void (*bprm_committing_creds)(struct linux_binprm *bprm); void (*bprm_committed_creds)(struct linux_binprm *bprm); + int (*fs_context_parse_param)(struct fs_context *fc, struct fs_parameter *param); + int (*sb_alloc_security)(struct super_block *sb); void (*sb_free_security)(struct super_block *sb); void (*sb_free_mnt_opts)(void *mnt_opts); @@ -1800,6 +1813,7 @@ struct security_hook_heads { struct hlist_head bprm_check_security; struct hlist_head bprm_committing_creds; struct hlist_head bprm_committed_creds; + struct hlist_head fs_context_parse_param; struct hlist_head sb_alloc_security; struct hlist_head sb_free_security; struct hlist_head sb_free_mnt_opts; diff --git a/include/linux/security.h b/include/linux/security.h index dbfb5a66babb..1cc4d7a3d6fa 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -53,6 +53,9 @@ struct msg_msg; struct xattr; struct xfrm_sec_ctx; struct mm_struct; +struct fs_context; +struct fs_parameter; +enum fs_value_type; /* If capable should audit the security request */ #define SECURITY_CAP_NOAUDIT 0 @@ -220,6 +223,7 @@ int security_bprm_set_creds(struct linux_binprm *bprm); int security_bprm_check(struct linux_binprm *bprm); void security_bprm_committing_creds(struct linux_binprm *bprm); void security_bprm_committed_creds(struct linux_binprm *bprm); +int security_fs_context_parse_param(struct fs_context *fc, struct fs_parameter *param); int security_sb_alloc(struct super_block *sb); void security_sb_free(struct super_block *sb); void security_free_mnt_opts(void **mnt_opts); @@ -517,6 +521,12 @@ static inline void security_bprm_committed_creds(struct linux_binprm *bprm) { } +static inline int security_fs_context_parse_param(struct fs_context *fc, + struct fs_parameter *param) +{ + return -ENOPARAM; +} + static inline int security_sb_alloc(struct super_block *sb) { return 0; diff --git a/security/security.c b/security/security.c index f1b8d2587639..e5519488327d 100644 --- a/security/security.c +++ b/security/security.c @@ -374,6 +374,11 @@ void security_bprm_committed_creds(struct linux_binprm *bprm) call_void_hook(bprm_committed_creds, bprm); } +int security_fs_context_parse_param(struct fs_context *fc, struct fs_parameter *param) +{ + return call_int_hook(fs_context_parse_param, -ENOPARAM, fc, param); +} + int security_sb_alloc(struct super_block *sb) { return call_int_hook(sb_alloc_security, 0, sb); |