linux-kernel - Re: [syzbot] [udf?] WARNING in __udf_add

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Message-ID: <20240116122910.qthqhskjsjzz3hzl@quack3>
Date: Tue, 16 Jan 2024 13:29:10 +0100
From: Jan Kara <jack@...e.cz>
To: syzbot <syzbot+e381e4c52ca8a53c3af7@...kaller.appspotmail.com>
Cc: gregkh@...uxfoundation.org, jack@...e.com, jirislaby@...nel.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [udf?] WARNING in __udf_add_aext (2)

On Wed 10-01-24 06:56:04, syzbot wrote:
> syzbot suspects this issue was fixed by commit:
> 
> commit 2aa91851ffa7cdfc0a63330d273115d38324b585
> Author: Jiri Slaby (SUSE) <jirislaby@...nel.org>
> Date:   Sun Aug 27 07:41:46 2023 +0000
> 
>     tty: n_tty: extract ECHO_OP processing to a separate function
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=129425e5e80000
> start commit:   b19edac5992d Merge tag 'nolibc.2023.06.22a' of git://git.k..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=33c8c2baba1cfc7e
> dashboard link: https://syzkaller.appspot.com/bug?extid=e381e4c52ca8a53c3af7
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1515b4f0a80000
> 
> If the result looks correct, please mark the issue as fixed by replying with:
> 
> #syz fix: tty: n_tty: extract ECHO_OP processing to a separate function

Unlikely. The bisection seems to have gone wrong in the first step. I'd
rather suspect this was fixed by "fs: Block writes to mounted block
devices".

So:

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

									Honza

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