From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail191.messagelabs.com (mail191.messagelabs.com [216.82.242.19]) by kanga.kvack.org (Postfix) with SMTP id ECF956B004D for ; Sun, 13 Sep 2009 21:52:43 -0400 (EDT) Message-ID: <4AADA1F9.9080305@redhat.com> Date: Mon, 14 Sep 2009 09:52:57 +0800 From: Danny Feng MIME-Version: 1.0 Subject: Re: [GIT BISECT] BUG kmalloc-8192: Object already free from kmem_cache_destroy References: <1252866835.13780.37.camel@dhcp231-106.rdu.redhat.com> <1252883493.16335.8.camel@dhcp231-106.rdu.redhat.com> In-Reply-To: <1252883493.16335.8.camel@dhcp231-106.rdu.redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Eric Paris Cc: cl@linux-foundation.org, penberg@cs.helsinki.fi, mingo@elte.hu, linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: On 09/14/2009 07:11 AM, Eric Paris wrote: > On Sun, 2009-09-13 at 14:33 -0400, Eric Paris wrote: >> 2a38a002fbee06556489091c30b04746222167e4 is first bad commit >> commit 2a38a002fbee06556489091c30b04746222167e4 >> Author: Xiaotian Feng >> Date: Wed Jul 22 17:03:57 2009 +0800 >> >> slub: sysfs_slab_remove should free kmem_cache when debug is enabled >> >> kmem_cache_destroy use sysfs_slab_remove to release the kmem_cache, >> but when CONFIG_SLUB_DEBUG is enabled, sysfs_slab_remove just release >> related kobject, the whole kmem_cache is missed to release and cause >> a memory leak. >> >> Acked-by: Christoph Lameer >> Signed-off-by: Xiaotian Feng >> Signed-off-by: Pekka Enberg >> >> CONFIG_SLUB_DEBUG=y >> CONFIG_SLUB=y >> CONFIG_SLUB_DEBUG_ON=y >> # CONFIG_SLUB_STATS is not set > > I also had problems destroying a kmem_cache in a security_initcall() > function which had a different backtrace (it's what made me create the > module and bisect.) So be sure to let me know what you find so I can > be sure that we fix that place as well (I believe that was a kref > problem rather than a double free) > > -Eric > > Could you please tell me the tree you're using? I'll debug on it first... -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org