linux-kernel - [PATCH 1/3] kmemleak: Show more information for objects found by alias

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Message-ID: <20100715150901.21793.2120.stgit@e102109-lin.cambridge.arm.com>
Date:	Thu, 15 Jul 2010 16:09:02 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	linux-kernel@...r.kernel.org
Cc:	Pekka Enberg <penberg@...helsinki.fi>
Subject: [PATCH 1/3] 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@....com>
Cc: Pekka Enberg <penberg@...helsinki.fi>
---
 mm/kmemleak.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index 2c0d032..c2c9feb 100644
--- 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

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