ipc: lost unlock and fput in mqueue.c on error path

The error path in sys_mq_getsetattr() after the call to
audit_mq_getsetattr() is wrong - the info->lock is not unlocked and the
struct file *filp is not put.

Fix them both.

Signed-off-by: Pavel Emelyanov <[e-mail]>
Cc: Pierre Peiffer <[e-mail]>
Cc: Nadia Derbey <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

ipc/mqueue.c

···
 	omqstat.mq_flags = filp->f_flags & O_NONBLOCK;
 	if (u_mqstat) {
 		ret = audit_mq_getsetattr(mqdes, &mqstat);
-		if (ret != 0)
-			goto out;
+		if (ret != 0) {
+			spin_unlock(&info->lock);
+			goto out_fput;
+		}
 		if (mqstat.mq_flags & O_NONBLOCK)
 			filp->f_flags |= O_NONBLOCK;
 		else