linux-kernel - Re: [syzbot] [udf?] KASAN: use-after-free Read in udf_sync

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Message-ID: <20240201091418.rqapa3fbc563jeyk@quack3>
Date: Thu, 1 Feb 2024 10:14:18 +0100
From: Jan Kara <jack@...e.cz>
To: syzbot <syzbot+82df44ede2faca24c729@...kaller.appspotmail.com>
Cc: axboe@...nel.dk, brauner@...nel.org, groeck@...gle.com,
	hdanton@...a.com, jack@...e.com, jack@...e.cz, kernel@...labora.com,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	shreeya.patel@...labora.com, steve.magnani@...idescorp.com,
	steve@...idescorp.com, syzkaller-bugs@...glegroups.com,
	zsm@...gle.com
Subject: Re: [syzbot] [udf?] KASAN: use-after-free Read in udf_sync_fs

On Wed 31-01-24 16:18:04, 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=11282540180000
> start commit:   55cb5f43689d Merge tag 'trace-v6.7-rc6' of git://git.kerne..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=e5751b3a2226135d
> dashboard link: https://syzkaller.appspot.com/bug?extid=82df44ede2faca24c729
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12dbd63ee80000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1534bed1e80000
> 
> If the result looks correct, please mark the issue as fixed by replying with:

Looks good.
 
#syz fix: fs: Block writes to mounted block devices

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