kmemleak: Show more information for objects found by alias

There may be situations when an object is freed using a pointer inside
the memory block. Kmemleak should show more information to help with
debugging.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>

diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index 2c0d032..c2c9feb 100644 (file)
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -398,7 +398,9 @@ static struct kmemleak_object *lookup_object(unsigned long ptr, int alias)
                object = prio_tree_entry(node, struct kmemleak_object,
                                         tree_node);
                if (!alias && object->pointer != ptr) {
-                       kmemleak_warn("Found object by alias");
+                       pr_warning("Found object by alias at 0x%08lx\n", ptr);
+                       dump_stack();
+                       dump_object_info(object);
                        object = NULL;
                }
        } else