Subject=Re:%20Re%3A%20UBI%20leb_write_unlock%20NULL%20pointer%20Oops%20%28continuation%29&In-Reply-To=%3C20140205201223.GA25295%40gmail.com%3E

[Richard Weinberger]

On Thu, Mar 3, 2016 at 10:04 AM, Tomasz Lach
<tomasz.lach at fideltronik.com> wrote:
>
> Hello everybody!
>
> I have the same error (OOPS in leb_write_unlock).
> I run kernel 3.6.9 on Atmel SAMA5D31 cpu, compiled with buildroot gcc 4.6.3
>
> I can reproduce error quite easy - writing lot of inserts into sqllite table from tcl.
>
> I've found that problem is with mutex le->mutex.wait_list.next -> it is NULL
> When I turn on mutex debugging - error disappears...
> I can't find when .next is NULL...

I think your kernel misses this stable patch:
commit 2928f0d0c5ebd6c9605c0d98207a44376387c298
Author: Adam Thomas <adamthomas1111 at gmail.com>
Date:   Sat Feb 2 22:32:31 2013 +0000

    UBIFS: fix use of freed ubifs_orphan objects

-- 
Thanks,
//richard