linux-kernel - Re: [BUG bisect] kernel BUG at block/bio.c:1833 and fail to mount disk

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Date:   Wed, 16 Jan 2019 09:54:05 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, Christoph Hellwig <hch@....de>,
        Omar Sandoval <osandov@...com>, Ming Lei <ming.lei@...hat.com>,
        "linux-samsung-soc@...r.kernel.org" 
        <linux-samsung-soc@...r.kernel.org>,
        linux-arm-kernel@...ts.infradead.org,
        "linux-next@...r.kernel.org" <linux-next@...r.kernel.org>
Subject: Re: [BUG bisect] kernel BUG at block/bio.c:1833 and fail to mount disk

On Wed, 16 Jan 2019 at 09:52, Krzysztof Kozlowski <krzk@...nel.org> wrote:
>
> Hi,
>
> On today's next-20190116 I see a bug during boot:
> [ 6.843308] kernel BUG at ../block/bio.c:1833!
> [ 6.847723] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM
> ...
> [ 7.543824] [<c044c144>] (bio_split) from [<00000000>] ( (null))
> [ 7.549881] Code: 13833b01 11c630bc e1a00006 e8bd8070 (e7f001f2)
>
> (not much in the calltrace)
> On all my boards. Also QEMU-arm fails.
>

I forgot the bisect commit:

258cfdfaf7bd729e759a0a91fd00ac9794796ad3 is the first bad commit
commit 258cfdfaf7bd729e759a0a91fd00ac9794796ad3
Author: Ming Lei <ming.lei@...hat.com>
Date:   Fri Jan 11 19:01:15 2019 +0800

    block: use bio_for_each_bvec() to compute multi-page bvec count

:040000 040000 d79b2e71d308650df4764ff644f29d3a24dbab96
0a5d624843b805ee0c9fd9a7e2d5163f5b15b167 M block

BR,
Krzysztof