security: remove dead hook task_setgroups

Unused hook.  Remove.
Signed-off-by: NEric Paris <eparis@redhat.com>
Signed-off-by: NJames Morris <jmorris@namei.org>

include/linux/security.h

@@ -704,11 +704,6 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  *	@p contains the task_struct for the process and place is into @secid.
  *	In case of failure, @secid will be set to zero.
  *
- * @task_setgroups:
- *	Check permission before setting the supplementary group set of the
- *	current process.
- *	@group_info contains the new group information.
- *	Return 0 if permission is granted.
  * @task_setnice:
  *	Check permission before setting the nice value of @p to @nice.
  *	@p contains the task_struct of process.
@@ -1518,7 +1513,6 @@ struct security_operations {
 	int (*task_getpgid) (struct task_struct *p);
 	int (*task_getsid) (struct task_struct *p);
 	void (*task_getsecid) (struct task_struct *p, u32 *secid);
-	int (*task_setgroups) (struct group_info *group_info);
 	int (*task_setnice) (struct task_struct *p, int nice);
 	int (*task_setioprio) (struct task_struct *p, int ioprio);
 	int (*task_getioprio) (struct task_struct *p);
@@ -1773,7 +1767,6 @@ int security_task_setpgid(struct task_struct *p, pid_t pgid);
 int security_task_getpgid(struct task_struct *p);
 int security_task_getsid(struct task_struct *p);
 void security_task_getsecid(struct task_struct *p, u32 *secid);
-int security_task_setgroups(struct group_info *group_info);
 int security_task_setnice(struct task_struct *p, int nice);
 int security_task_setioprio(struct task_struct *p, int ioprio);
 int security_task_getioprio(struct task_struct *p);
@@ -2329,11 +2322,6 @@ static inline void security_task_getsecid(struct task_struct *p, u32 *secid)
 	*secid = 0;
 }
 
-static inline int security_task_setgroups(struct group_info *group_info)
-{
-	return 0;
-}
-
 static inline int security_task_setnice(struct task_struct *p, int nice)
 {
 	return cap_task_setnice(p, nice);

kernel/groups.c

@@ -164,12 +164,6 @@ int groups_search(const struct group_info *group_info, gid_t grp)
  */
 int set_groups(struct cred *new, struct group_info *group_info)
 {
-	int retval;
-
-	retval = security_task_setgroups(group_info);
-	if (retval)
-		return retval;
-
 	put_group_info(new->group_info);
 	groups_sort(group_info);
 	get_group_info(group_info);

security/capability.c

@@ -412,11 +412,6 @@ static void cap_task_getsecid(struct task_struct *p, u32 *secid)
 	*secid = 0;
 }
 
-static int cap_task_setgroups(struct group_info *group_info)
-{
-	return 0;
-}
-
 static int cap_task_getioprio(struct task_struct *p)
 {
 	return 0;
@@ -967,7 +962,6 @@ void security_fixup_ops(struct security_operations *ops)
 	set_to_cap_if_null(ops, task_getpgid);
 	set_to_cap_if_null(ops, task_getsid);
 	set_to_cap_if_null(ops, task_getsecid);
-	set_to_cap_if_null(ops, task_setgroups);
 	set_to_cap_if_null(ops, task_setnice);
 	set_to_cap_if_null(ops, task_setioprio);
 	set_to_cap_if_null(ops, task_getioprio);

security/security.c

@@ -759,11 +759,6 @@ void security_task_getsecid(struct task_struct *p, u32 *secid)
 }
 EXPORT_SYMBOL(security_task_getsecid);
 
-int security_task_setgroups(struct group_info *group_info)
-{
-	return security_ops->task_setgroups(group_info);
-}
-
 int security_task_setnice(struct task_struct *p, int nice)
 {
 	return security_ops->task_setnice(p, nice);