security: remove dead hook task_setgid

Unused hook.  Remove.

Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>

4 files changed, 0 insertions, 47 deletions

diff --git a/include/linux/security.h b/include/linux/security.h
index 447c57fcec88..04ce0d6e4edf 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -683,18 +683,6 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  *      @old is the set of credentials that are being replaces
  *      @flags contains one of the LSM_SETID_* values.
  *      Return 0 on success.
- * @task_setgid:
- *      Check permission before setting one or more of the group identity
- *      attributes of the current process.  The @flags parameter indicates
- *      which of the set*gid system calls invoked this hook and how to
- *      interpret the @id0, @id1, and @id2 parameters.  See the LSM_SETID
- *      definitions at the beginning of this file for the @flags values and
- *      their meanings.
- *      @id0 contains a gid.
- *      @id1 contains a gid.
- *      @id2 contains a gid.
- *      @flags contains one of the LSM_SETID_* values.
- *      Return 0 if permission is granted.
  * @task_setpgid:
  *      Check permission before setting the process group identifier of the
  *      process @p to @pgid.
@@ -1526,7 +1514,6 @@ struct security_operations {
         int (*kernel_module_request)(char *kmod_name);
         int (*task_fix_setuid) (struct cred *new, const struct cred *old,
                                 int flags);
-        int (*task_setgid) (gid_t id0, gid_t id1, gid_t id2, int flags);
         int (*task_setpgid) (struct task_struct *p, pid_t pgid);
         int (*task_getpgid) (struct task_struct *p);
         int (*task_getsid) (struct task_struct *p);
@@ -1782,7 +1769,6 @@ int security_kernel_create_files_as(struct cred *new, struct inode *inode);
 int security_kernel_module_request(char *kmod_name);
 int security_task_fix_setuid(struct cred *new, const struct cred *old,
                              int flags);
-int security_task_setgid(gid_t id0, gid_t id1, gid_t id2, int flags);
 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);
@@ -2323,12 +2309,6 @@ static inline int security_task_fix_setuid(struct cred *new,
         return cap_task_fix_setuid(new, old, flags);
 }
 
-static inline int security_task_setgid(gid_t id0, gid_t id1, gid_t id2,
-                                       int flags)
-{
-        return 0;
-}
-
 static inline int security_task_setpgid(struct task_struct *p, pid_t pgid)
 {
         return 0;
diff --git a/kernel/sys.c b/kernel/sys.c
index 396c11cd9a20..eb1ec5c7f03b 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -491,10 +491,6 @@ SYSCALL_DEFINE2(setregid, gid_t, rgid, gid_t, egid)
                 return -ENOMEM;
         old = current_cred();
 
-        retval = security_task_setgid(rgid, egid, (gid_t)-1, LSM_SETID_RE);
-        if (retval)
-                goto error;
-
         retval = -EPERM;
         if (rgid != (gid_t) -1) {
                 if (old->gid == rgid ||
@@ -542,10 +538,6 @@ SYSCALL_DEFINE1(setgid, gid_t, gid)
                 return -ENOMEM;
         old = current_cred();
 
-        retval = security_task_setgid(gid, (gid_t)-1, (gid_t)-1, LSM_SETID_ID);
-        if (retval)
-                goto error;
-
         retval = -EPERM;
         if (capable(CAP_SETGID))
                 new->gid = new->egid = new->sgid = new->fsgid = gid;
@@ -776,10 +768,6 @@ SYSCALL_DEFINE3(setresgid, gid_t, rgid, gid_t, egid, gid_t, sgid)
                 return -ENOMEM;
         old = current_cred();
 
-        retval = security_task_setgid(rgid, egid, sgid, LSM_SETID_RES);
-        if (retval)
-                goto error;
-
         retval = -EPERM;
         if (!capable(CAP_SETGID)) {
                 if (rgid != (gid_t) -1 && rgid != old->gid &&
@@ -872,9 +860,6 @@ SYSCALL_DEFINE1(setfsgid, gid_t, gid)
         old = current_cred();
         old_fsgid = old->fsgid;
 
-        if (security_task_setgid(gid, (gid_t)-1, (gid_t)-1, LSM_SETID_FS))
-                goto error;
-
         if (gid == old->gid  || gid == old->egid  ||
             gid == old->sgid || gid == old->fsgid ||
             capable(CAP_SETGID)) {
@@ -884,7 +869,6 @@ SYSCALL_DEFINE1(setfsgid, gid_t, gid)
                 }
         }
 
-error:
         abort_creds(new);
         return old_fsgid;
 
diff --git a/security/capability.c b/security/capability.c
index 41ff54f3b4d8..66cd7453563f 100644
--- a/security/capability.c
+++ b/security/capability.c
@@ -392,11 +392,6 @@ static int cap_kernel_module_request(char *kmod_name)
         return 0;
 }
 
-static int cap_task_setgid(gid_t id0, gid_t id1, gid_t id2, int flags)
-{
-        return 0;
-}
-
 static int cap_task_setpgid(struct task_struct *p, pid_t pgid)
 {
         return 0;
@@ -968,7 +963,6 @@ void security_fixup_ops(struct security_operations *ops)
         set_to_cap_if_null(ops, kernel_create_files_as);
         set_to_cap_if_null(ops, kernel_module_request);
         set_to_cap_if_null(ops, task_fix_setuid);
-        set_to_cap_if_null(ops, task_setgid);
         set_to_cap_if_null(ops, task_setpgid);
         set_to_cap_if_null(ops, task_getpgid);
         set_to_cap_if_null(ops, task_getsid);
diff --git a/security/security.c b/security/security.c
index 3900da3da87b..1e35dd669209 100644
--- a/security/security.c
+++ b/security/security.c
@@ -738,11 +738,6 @@ int security_task_fix_setuid(struct cred *new, const struct cred *old,
         return security_ops->task_fix_setuid(new, old, flags);
 }
 
-int security_task_setgid(gid_t id0, gid_t id1, gid_t id2, int flags)
-{
-        return security_ops->task_setgid(id0, id1, id2, flags);
-}
-
 int security_task_setpgid(struct task_struct *p, pid_t pgid)
 {
         return security_ops->task_setpgid(p, pgid);