linux-ext4 - Re: [syzbot] [ext4?] WARNING in lock_two

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Date: Mon, 12 Feb 2024 14:28:52 +0100
From: Jan Kara <jack@...e.cz>
To: syzbot <syzbot+2c4a3b922a860084cc7f@...kaller.appspotmail.com>
Cc: adilger.kernel@...ger.ca, axboe@...nel.dk, brauner@...nel.org,
	eadavis@...com, jack@...e.cz, libaokun1@...wei.com,
	linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com,
	tytso@....edu, viro@...iv.linux.org.uk, willy@...radead.org,
	yangerkun@...wei.com
Subject: Re: [syzbot] [ext4?] WARNING in lock_two_nondirectories

On Sun 11-02-24 16:00:04, 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=15477434180000
> start commit:   a39b6ac3781d Linux 6.7-rc5
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=e043d554f0a5f852
> dashboard link: https://syzkaller.appspot.com/bug?extid=2c4a3b922a860084cc7f
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1687292ee80000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16d8adbce80000
> 
> If the result looks correct, please mark the issue as fixed by replying with:

Another repro that seems to be corrupting the fs metadata:

#syz fix: fs: Block writes to mounted block devices

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