From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933517Ab0GOPMv (ORCPT ); Thu, 15 Jul 2010 11:12:51 -0400 Received: from cam-admin0.cambridge.arm.com ([217.140.96.50]:59995 "EHLO cam-admin0.cambridge.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933421Ab0GOPMt (ORCPT ); Thu, 15 Jul 2010 11:12:49 -0400 Subject: [PATCH 1/3] kmemleak: Show more information for objects found by alias To: linux-kernel@vger.kernel.org From: Catalin Marinas Cc: Pekka Enberg Date: Thu, 15 Jul 2010 16:09:02 +0100 Message-ID: <20100715150901.21793.2120.stgit@e102109-lin.cambridge.arm.com> In-Reply-To: <20100715150703.21793.94815.stgit@e102109-lin.cambridge.arm.com> References: <20100715150703.21793.94815.stgit@e102109-lin.cambridge.arm.com> User-Agent: StGit/0.15-83-g972d5 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 15 Jul 2010 15:09:02.0284 (UTC) FILETIME=[A8B750C0:01CB242F] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Cc: Pekka Enberg --- 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