Commit e0b93edd authored by Jeff Layton's avatar Jeff Layton
Browse files

security: make security_file_set_fowner, f_setown and __f_setown void return 



security_file_set_fowner always returns 0, so make it f_setown and
__f_setown void return functions and fix up the error handling in the
callers.

Cc: linux-security-module@vger.kernel.org
Signed-off-by: default avatarJeff Layton <jlayton@primarydata.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
parent 1c994a09

drivers/net/tun.c

+1 −3
Original line number Diff line number Diff line
@@ -2152,9 +2152,7 @@ static int tun_chr_fasync(int fd, struct file *file, int on) 
		goto out;



	if (on) {

		ret = __f_setown(file, task_pid(current), PIDTYPE_PID, 0);

		if (ret)

			goto out;

		__f_setown(file, task_pid(current), PIDTYPE_PID, 0);

		tfile->flags |= TUN_FASYNC;

	} else

		tfile->flags &= ~TUN_FASYNC;

drivers/tty/tty_io.c

+2 −1
Original line number Diff line number Diff line
@@ -2163,8 +2163,9 @@ static int __tty_fasync(int fd, struct file *filp, int on) 
		}

		get_pid(pid);

		spin_unlock_irqrestore(&tty->ctrl_lock, flags);

		retval = __f_setown(filp, pid, type, 0);

		__f_setown(filp, pid, type, 0);

		put_pid(pid);

		retval = 0;

	}

out:

	return retval;

fs/fcntl.c

+7 −14
Original line number Diff line number Diff line
@@ -98,26 +98,19 @@ static void f_modown(struct file *filp, struct pid *pid, enum pid_type type, 
	write_unlock_irq(&filp->f_owner.lock);

}



int __f_setown(struct file *filp, struct pid *pid, enum pid_type type,

void __f_setown(struct file *filp, struct pid *pid, enum pid_type type,

		int force)

{

	int err;



	err = security_file_set_fowner(filp);

	if (err)

		return err;



	security_file_set_fowner(filp);

	f_modown(filp, pid, type, force);

	return 0;

}

EXPORT_SYMBOL(__f_setown);



int f_setown(struct file *filp, unsigned long arg, int force)

void f_setown(struct file *filp, unsigned long arg, int force)

{

	enum pid_type type;

	struct pid *pid;

	int who = arg;

	int result;

	type = PIDTYPE_PID;

	if (who < 0) {

		type = PIDTYPE_PGID;
@@ -125,9 +118,8 @@ int f_setown(struct file *filp, unsigned long arg, int force) 
	}

	rcu_read_lock();

	pid = find_vpid(who);

	result = __f_setown(filp, pid, type, force);

	__f_setown(filp, pid, type, force);

	rcu_read_unlock();

	return result;

}

EXPORT_SYMBOL(f_setown);
@@ -181,7 +173,7 @@ static int f_setown_ex(struct file *filp, unsigned long arg) 
	if (owner.pid && !pid)

		ret = -ESRCH;

	else

		ret = __f_setown(filp, pid, type, 1);

		 __f_setown(filp, pid, type, 1);

	rcu_read_unlock();



	return ret;
@@ -302,7 +294,8 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg, 
		force_successful_syscall_return();

		break;

	case F_SETOWN:

		err = f_setown(filp, arg, 1);

		f_setown(filp, arg, 1);

		err = 0;

		break;

	case F_GETOWN_EX:

		err = f_getown_ex(filp, arg);

fs/locks.c

+1 −1
Original line number Diff line number Diff line
@@ -1776,7 +1776,7 @@ static int do_fcntl_add_lease(unsigned int fd, struct file *filp, long arg) 
	if (!fasync_insert_entry(fd, filp, &ret->fl_fasync, new))

		new = NULL;



	error = __f_setown(filp, task_pid(current), PIDTYPE_PID, 0);

	__f_setown(filp, task_pid(current), PIDTYPE_PID, 0);

out_unlock:

	spin_unlock(&inode->i_lock);

	if (fl)

fs/notify/dnotify/dnotify.c

+1 −7
Original line number Diff line number Diff line
@@ -346,13 +346,7 @@ int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg) 
		goto out;

	}



	error = __f_setown(filp, task_pid(current), PIDTYPE_PID, 0);

	if (error) {

		/* if we added, we must shoot */

		if (dn_mark == new_dn_mark)

			destroy = 1;

		goto out;

	}

	__f_setown(filp, task_pid(current), PIDTYPE_PID, 0);



	error = attach_dn(dn, dn_mark, id, fd, filp, mask);

	/* !error means that we attached the dn to the dn_mark, so don't free it */