security: remove dead hook task_setuid
Unused hook. Remove.
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/include/linux/security.h b/include/linux/security.h
index 33b0c1b..447c57f 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -674,18 +674,6 @@
* userspace to load a kernel module with the given name.
* @kmod_name name of the module requested by the kernel
* Return 0 if successful.
- * @task_setuid:
- * Check permission before setting one or more of the user identity
- * attributes of the current process. The @flags parameter indicates
- * which of the set*uid 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 uid.
- * @id1 contains a uid.
- * @id2 contains a uid.
- * @flags contains one of the LSM_SETID_* values.
- * Return 0 if permission is granted.
* @task_fix_setuid:
* Update the module's state after setting one or more of the user
* identity attributes of the current process. The @flags parameter
@@ -1536,7 +1524,6 @@
int (*kernel_act_as)(struct cred *new, u32 secid);
int (*kernel_create_files_as)(struct cred *new, struct inode *inode);
int (*kernel_module_request)(char *kmod_name);
- int (*task_setuid) (uid_t id0, uid_t id1, uid_t id2, int flags);
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);
@@ -1793,7 +1780,6 @@
int security_kernel_act_as(struct cred *new, u32 secid);
int security_kernel_create_files_as(struct cred *new, struct inode *inode);
int security_kernel_module_request(char *kmod_name);
-int security_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags);
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);
@@ -2330,12 +2316,6 @@
return 0;
}
-static inline int security_task_setuid(uid_t id0, uid_t id1, uid_t id2,
- int flags)
-{
- return 0;
-}
-
static inline int security_task_fix_setuid(struct cred *new,
const struct cred *old,
int flags)
diff --git a/kernel/sys.c b/kernel/sys.c
index 8298878..396c11c 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -609,10 +609,6 @@
return -ENOMEM;
old = current_cred();
- retval = security_task_setuid(ruid, euid, (uid_t)-1, LSM_SETID_RE);
- if (retval)
- goto error;
-
retval = -EPERM;
if (ruid != (uid_t) -1) {
new->uid = ruid;
@@ -674,10 +670,6 @@
return -ENOMEM;
old = current_cred();
- retval = security_task_setuid(uid, (uid_t)-1, (uid_t)-1, LSM_SETID_ID);
- if (retval)
- goto error;
-
retval = -EPERM;
if (capable(CAP_SETUID)) {
new->suid = new->uid = uid;
@@ -718,9 +710,6 @@
if (!new)
return -ENOMEM;
- retval = security_task_setuid(ruid, euid, suid, LSM_SETID_RES);
- if (retval)
- goto error;
old = current_cred();
retval = -EPERM;
@@ -850,9 +839,6 @@
old = current_cred();
old_fsuid = old->fsuid;
- if (security_task_setuid(uid, (uid_t)-1, (uid_t)-1, LSM_SETID_FS) < 0)
- goto error;
-
if (uid == old->uid || uid == old->euid ||
uid == old->suid || uid == old->fsuid ||
capable(CAP_SETUID)) {
@@ -863,7 +849,6 @@
}
}
-error:
abort_creds(new);
return old_fsuid;
diff --git a/security/capability.c b/security/capability.c
index a927bde..41ff54f 100644
--- a/security/capability.c
+++ b/security/capability.c
@@ -392,11 +392,6 @@
return 0;
}
-static int cap_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
-{
- return 0;
-}
-
static int cap_task_setgid(gid_t id0, gid_t id1, gid_t id2, int flags)
{
return 0;
@@ -972,7 +967,6 @@
set_to_cap_if_null(ops, kernel_act_as);
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_setuid);
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);
diff --git a/security/security.c b/security/security.c
index 6e59426..3900da3 100644
--- a/security/security.c
+++ b/security/security.c
@@ -732,11 +732,6 @@
return security_ops->kernel_module_request(kmod_name);
}
-int security_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
-{
- return security_ops->task_setuid(id0, id1, id2, flags);
-}
-
int security_task_fix_setuid(struct cred *new, const struct cred *old,
int flags)
{