From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ryusuke Konishi <konishi.ryusuke-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: [syzbot] [nilfs?] general protection fault in nilfs_clear_dirty_page
Date: Mon, 12 Jun 2023 12:59:39 +0900
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To: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
Cc: syzbot <syzbot+53369d11851d8f26735c-Pl5Pbv+GP7P466ipTTIvnc23WoclnBCfAL8bYrjMMd8@public.gmane.org>, axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org, dsterba-IBi9RG/b67k@public.gmane.org, linux-block-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-nilfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, syzkaller-bugs-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org, wqu-IBi9RG/b67k@public.gmane.org

On Mon, Jun 12, 2023 at 12:30=E2=80=AFPM Christoph Hellwig wrote:
>
> On Sun, Jun 11, 2023 at 02:18:29PM -0700, syzbot wrote:
> > syzbot has bisected this issue to:
> >
> > commit 4a445b7b6178d88956192c0202463063f52e8667
> > Author: Qu Wenruo <wqu-IBi9RG/b67k@public.gmane.org>
> > Date:   Sat Aug 13 08:06:53 2022 +0000
> >
> >     btrfs: don't merge pages into bio if their page offset is not conti=
guous
>
> I can't see how that btrfs commit would affect nilfs2..

Yeah, I think this bisection result is wrong.
I have already posted a bug-fix patch titled "nilfs2: prevent general
protection fault in nilfs_clear_dirty_page()"
for this issue.

Thanks,
Ryusuke Konishi