linux-kernel - Re: [GIT BISECT] BUG kmalloc-8192: Object already free from kmem_cache

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 14 Sep 2009 11:29:11 +0800
From:	Danny Feng <dfeng@...hat.com>
To:	Eric Paris <eparis@...hat.com>
CC:	cl@...ux-foundation.org, penberg@...helsinki.fi, mingo@...e.hu,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [GIT BISECT] BUG kmalloc-8192: Object already free from kmem_cache_destroy

On 09/14/2009 11:25 AM, Eric Paris wrote:
> On Mon, 2009-09-14 at 11:18 +0800, Danny Feng wrote:
>> diff --git a/mm/slub.c b/mm/slub.c
>> index b627675..40e12d5 100644
>> --- a/mm/slub.c
>> +++ b/mm/slub.c
>> @@ -3337,8 +3337,8 @@ struct kmem_cache *kmem_cache_create(const char
>> *name, size_t size,
>>                                  goto err;
>>                          }
>>                          return s;
>> -               }
>> -               kfree(s);
>> +               } else
>> +                       kfree(s);
>>          }
>>          up_write(&slub_lock);
>>
>
> Doesn't the return inside the conditional take care of this?  I'll give
> it a try in the morning, but I don't see how this can solve the
> problem....
>
> -Eric
>
>
err, you're right... let me try to find why. It's strange, if SLUB_DEBUG 
is not set, sysfs_slab_remove is just to free kmem_cache s. So I think 
if SLUB_DEBUG is not set, we also have the same issue....
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/