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Message-ID: <f294c55b-3855-9ec3-c66c-a698747f22e0@gmx.com>
Date: Mon, 31 Jul 2023 18:01:14 +0800
From: Qu Wenruo <quwenruo.btrfs@....com>
To: Christoph Hellwig <hch@...radead.org>
Cc: Christoph Hellwig <hch@....de>,
syzbot <syzbot+ae97a827ae1c3336bbb4@...kaller.appspotmail.com>,
clm@...com, dsterba@...e.com, johannes.thumshirn@....com,
josef@...icpanda.com, linux-btrfs@...r.kernel.org,
linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [btrfs?] kernel BUG in prepare_to_merge
On 2023/7/31 17:46, Christoph Hellwig wrote:
> Thanks. I've not been able to reproduce it on the apparent bisection
> commit for more than half an hour, but running it on the originally
> reported commit reproduces it after a few minutes. I'll see if I
> can come up with a better bisection.
>
I checked the related code, and didn't find anything obvious.
But there is a chance that the image is intentionally corrupted so that
we got a reloc root but incorrect root owner.
Thus I sent out a patch to make that triggering ASSERT() to a more
graceful exit:
https://lore.kernel.org/linux-btrfs/24881cc9caf738f6248232709d7357d3186773b5.1690782754.git.wqu@suse.com/T/#u
Although I never got the C reproducer to trigger, thus no confirmation
on that.
Thanks,
Qu
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