linux-kernel - Re: [syzbot] [gfs2?] general protection fault in gfs2_dump

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Date: Mon, 19 Feb 2024 13:56:02 +0100
From: Jan Kara <jack@...e.cz>
To: syzbot <syzbot+427fed3295e9a7e887f2@...kaller.appspotmail.com>
Cc: agruenba@...hat.com, axboe@...nel.dk, brauner@...nel.org,
	cluster-devel@...hat.com, elver@...gle.com, gfs2@...ts.linux.dev,
	jack@...e.cz, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, nogikh@...gle.com,
	peterz@...radead.org, rpeterso@...hat.com,
	syzkaller-bugs@...glegroups.com, valentin.schneider@....com
Subject: Re: [syzbot] [gfs2?] general protection fault in gfs2_dump_glock (2)

On Mon 19-02-24 03:58:05, syzbot wrote:
> syzbot suspects this issue was fixed by commit:
> 
> commit 6f861765464f43a71462d52026fbddfc858239a5
> Author: Jan Kara <jack@...e.cz>
> Date:   Wed Nov 1 17:43:10 2023 +0000
> 
>     fs: Block writes to mounted block devices
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14238a3c180000
> start commit:   58390c8ce1bd Merge tag 'iommu-updates-v6.4' of git://git.k..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=5eadbf0d3c2ece89
> dashboard link: https://syzkaller.appspot.com/bug?extid=427fed3295e9a7e887f2
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=172bead8280000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14d01d08280000
> 
> If the result looks correct, please mark the issue as fixed by replying with:
> 
> #syz fix: fs: Block writes to mounted block devices

I don't see anything that suspicious in the reproducers but there's no
working reproducer anymore. So I'm leaving this upto gfs2 maintainers to
decide.

								Honza

-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR