futex: Replace pointless printk in fixup_owner()

If that unexpected case of inconsistent arguments ever happens then the futex state is left completely inconsistent and the printk is not really helpful. Replace it with a warning and make the state consistent. Signed-off-by: Thomas Gleixner <[email protected]> Acked-by: Peter Zijlstra (Intel) <[email protected]> Cc: [email protected]
jangid · Jan 26, 2021 · 04b79c5 · 04b79c5
1 parent 12bb3f7
commit 04b79c5
Showing 1 changed file with 3 additions and 7 deletions.
diff --git a/kernel/futex.c b/kernel/futex.c
@@ -2550,14 +2550,10 @@ static int fixup_owner(u32 __user *uaddr, struct futex_q *q, int locked)
 
 	/*
 	 * Paranoia check. If we did not take the lock, then we should not be
-	 * the owner of the rt_mutex.
+	 * the owner of the rt_mutex. Warn and establish consistent state.
 	 */
-	if (rt_mutex_owner(&q->pi_state->pi_mutex) == current) {
-		printk(KERN_ERR "fixup_owner: ret = %d pi-mutex: %p "
-				"pi-state %p\n", ret,
-				q->pi_state->pi_mutex.owner,
-				q->pi_state->owner);
-	}
+	if (WARN_ON_ONCE(rt_mutex_owner(&q->pi_state->pi_mutex) == current))
+		return fixup_pi_state_owner(uaddr, q, current);
 
 	return 0;
 }