kasan: test fix: warn if the UAF could not be detected in kmalloc_uaf2

Signed-off-by: Alexander Potapenko <[email protected]> Acked-by: Andrey Ryabinin <[email protected]> Cc: Christoph Lameter <[email protected]> Cc: Pekka Enberg <[email protected]> Cc: David Rientjes <[email protected]> Cc: Joonsoo Kim <[email protected]> Cc: Andrey Konovalov <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Konstantin Serebryany <[email protected]> Cc: Dmitry Chernenkov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
laijs · Mar 25, 2016 · 9dcadd3 · 9dcadd3
1 parent cd11016
commit 9dcadd3
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/lib/test_kasan.c b/lib/test_kasan.c
@@ -294,6 +294,8 @@ static noinline void __init kmalloc_uaf2(void)
 	}
 
 	ptr1[40] = 'x';
+	if (ptr1 == ptr2)
+		pr_err("Could not detect use-after-free: ptr1 == ptr2\n");
 	kfree(ptr2);
 }