kmemleak: Check for NULL pointer returned by create_object()

This patch adds NULL pointer checking in the early_alloc() function. Reported-by: Paul E. McKenney <[email protected]> Signed-off-by: Catalin Marinas <[email protected]> Acked-by: Pekka Enberg <[email protected]> Acked-by: Paul E. McKenney <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
kyagi · Oct 9, 2009 · 0d5d1aa · 0d5d1aa
1 parent c1bcd6b
commit 0d5d1aa
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
@@ -834,11 +834,14 @@ static void early_alloc(struct early_log *log)
 	rcu_read_lock();
 	object = create_object((unsigned long)log->ptr, log->size,
 			       log->min_count, GFP_ATOMIC);
+	if (!object)
+		goto out;
 	spin_lock_irqsave(&object->lock, flags);
 	for (i = 0; i < log->trace_len; i++)
 		object->trace[i] = log->trace[i];
 	object->trace_len = log->trace_len;
 	spin_unlock_irqrestore(&object->lock, flags);
+out:
 	rcu_read_unlock();
 }