linux-kernel - Re: [block] BUG: KASAN: use-after-free in rb

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Message-ID: <6b17c360-d11f-6db5-4933-0c91f70d6a89@kernel.dk>
Date:   Thu, 9 Mar 2017 08:38:34 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     Mike Galbraith <efault@....de>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [block] BUG: KASAN: use-after-free in rb_erase+0x1431/0x1970

On 03/09/2017 08:16 AM, Mike Galbraith wrote:
> Greetings,
> 
> Building master.today with kasan enabled (because I saw the same when
> trying out kasan on rt), the below fell out.
> 
> Config is enterprise based (tune for maximum build time), plus PREEMPT.
> 
> [    5.335444] ==================================================================
> [    5.337030] BUG: KASAN: use-after-free in rb_erase+0x1431/0x1970 at addr ffff88035e78abb0
> [    5.338642] Write of size 8 by task swapper/7/0
> [    5.340204] CPU: 7 PID: 0 Comm: swapper/7 Tainted: G            E   4.11.0-kasan #160
> [    5.341774] Hardware name: MEDION MS-7848/MS-7848, BIOS M7848W08.20C 09/23/2013

Should be fixed in my for-linus branch, it'll go out soon. If you want
to verify, pull:

git://git.kernel.dk/linux-block for-linus

into master and see if that works for you.

-- 
Jens Axboe