diff --git a/fs/exec.c b/fs/exec.c index 6b6668baa44a39de5d387647b806fe55fb23d5ca..1138dc502c777f98ddff7bf34f20b6d5be82e21c 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -833,7 +833,7 @@ int kernel_read(struct file *file, loff_t offset, EXPORT_SYMBOL(kernel_read); int kernel_read_file(struct file *file, void **buf, loff_t *size, - loff_t max_size) + loff_t max_size, enum kernel_read_file_id id) { loff_t i_size, pos; ssize_t bytes = 0; @@ -871,7 +871,7 @@ int kernel_read_file(struct file *file, void **buf, loff_t *size, goto out; } - ret = security_kernel_post_read_file(file, *buf, i_size); + ret = security_kernel_post_read_file(file, *buf, i_size, id); if (!ret) *size = pos; diff --git a/include/linux/fs.h b/include/linux/fs.h index 9a83d82b61ac63493a3a3034e4d98a7c9207654d..aa84bcb9c3684c49ccc2b9417e63a6a06b9ea92c 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2576,8 +2576,13 @@ static inline void i_readcount_inc(struct inode *inode) #endif extern int do_pipe_flags(int *, int); +enum kernel_read_file_id { + READING_MAX_ID +}; + extern int kernel_read(struct file *, loff_t, char *, unsigned long); -extern int kernel_read_file(struct file *, void **, loff_t *, loff_t); +extern int kernel_read_file(struct file *, void **, loff_t *, loff_t, + enum kernel_read_file_id); extern ssize_t kernel_write(struct file *, const char *, size_t, loff_t); extern ssize_t __kernel_write(struct file *, const char *, size_t, loff_t *); extern struct file * open_exec(const char *); diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h index f82631cc72483f2b5fb9fd2cfb5a5268f53eae43..2337f33913c16f21ff514c93b15864276afed7c5 100644 --- a/include/linux/lsm_hooks.h +++ b/include/linux/lsm_hooks.h @@ -567,6 +567,7 @@ * by the kernel. * @buf pointer to buffer containing the file contents. * @size length of the file contents. + * @id kernel read file identifier * Return 0 if permission is granted. * @task_fix_setuid: * Update the module's state after setting one or more of the user @@ -1464,7 +1465,8 @@ union security_list_options { int (*kernel_fw_from_file)(struct file *file, char *buf, size_t size); int (*kernel_module_request)(char *kmod_name); int (*kernel_module_from_file)(struct file *file); - int (*kernel_post_read_file)(struct file *file, char *buf, loff_t size); + int (*kernel_post_read_file)(struct file *file, char *buf, loff_t size, + enum kernel_read_file_id id); int (*task_fix_setuid)(struct cred *new, const struct cred *old, int flags); int (*task_setpgid)(struct task_struct *p, pid_t pgid); diff --git a/include/linux/security.h b/include/linux/security.h index f30f5647d1e18a9cf533dd21ad33d319f7245849..b68ce94e4e00137bfa4b2dce2d28d56c47035f1a 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -28,6 +28,7 @@ #include #include #include +#include struct linux_binprm; struct cred; @@ -301,7 +302,8 @@ int security_kernel_create_files_as(struct cred *new, struct inode *inode); int security_kernel_fw_from_file(struct file *file, char *buf, size_t size); int security_kernel_module_request(char *kmod_name); int security_kernel_module_from_file(struct file *file); -int security_kernel_post_read_file(struct file *file, char *buf, loff_t size); +int security_kernel_post_read_file(struct file *file, char *buf, loff_t size, + enum kernel_read_file_id id); int security_task_fix_setuid(struct cred *new, const struct cred *old, int flags); int security_task_setpgid(struct task_struct *p, pid_t pgid); @@ -868,7 +870,8 @@ static inline int security_kernel_module_from_file(struct file *file) } static inline int security_kernel_post_read_file(struct file *file, - char *buf, loff_t size) + char *buf, loff_t size, + enum kernel_read_file_id id) { return 0; } diff --git a/security/security.c b/security/security.c index c98dd6bf4ebdd7d6437284b6b5f0660a8193e678..5b96eabaafd4362c1158001f8427f98775e9f4a2 100644 --- a/security/security.c +++ b/security/security.c @@ -910,9 +910,10 @@ int security_kernel_module_from_file(struct file *file) return ima_module_check(file); } -int security_kernel_post_read_file(struct file *file, char *buf, loff_t size) +int security_kernel_post_read_file(struct file *file, char *buf, loff_t size, + enum kernel_read_file_id id) { - return call_int_hook(kernel_post_read_file, 0, file, buf, size); + return call_int_hook(kernel_post_read_file, 0, file, buf, size, id); } EXPORT_SYMBOL_GPL(security_kernel_post_read_file);