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Commit 43ed8c3b authored by Eric Paris's avatar Eric Paris Committed by James Morris
Browse files

security: remove dead hook task_setuid 



Unused hook.  Remove.

Signed-off-by: default avatarEric Paris <eparis@redhat.com>
Signed-off-by: default avatarJames Morris <jmorris@namei.org>
parent 0968d006

include/linux/security.h

+0 −20
Original line number Diff line number Diff line
@@ -674,18 +674,6 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts) 
 *	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 @@ struct security_operations { 
	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 @@ void security_transfer_creds(struct cred *new, const struct cred *old); 
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 @@ static inline int security_kernel_module_request(char *kmod_name) 
	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)

kernel/sys.c

+0 −15
Original line number Diff line number Diff line
@@ -609,10 +609,6 @@ SYSCALL_DEFINE2(setreuid, uid_t, ruid, uid_t, euid) 
		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 @@ SYSCALL_DEFINE1(setuid, uid_t, uid) 
		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 @@ SYSCALL_DEFINE3(setresuid, uid_t, ruid, uid_t, euid, uid_t, suid) 
	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 @@ SYSCALL_DEFINE1(setfsuid, uid_t, uid) 
	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 @@ SYSCALL_DEFINE1(setfsuid, uid_t, uid) 
		}

	}



error:

	abort_creds(new);

	return old_fsuid;

security/capability.c

+0 −6
Original line number Diff line number Diff line
@@ -392,11 +392,6 @@ static int cap_kernel_module_request(char *kmod_name) 
	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 @@ void security_fixup_ops(struct security_operations *ops) 
	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);

security/security.c

+0 −5
Original line number Diff line number Diff line
@@ -732,11 +732,6 @@ int security_kernel_module_request(char *kmod_name) 
	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)

{