linux-kernel - Re: [syzbot] [jfs?] UBSAN: array-index-out-of-bounds in diWrite

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Message-ID: <20240115134228.vk73b4lkk7lxkgyr@quack3>
Date: Mon, 15 Jan 2024 14:42:28 +0100
From: Jan Kara <jack@...e.cz>
To: syzbot <syzbot+c1056fdfe414463fdb33@...kaller.appspotmail.com>
Cc: axboe@...nel.dk, brauner@...nel.org, dave.kleikamp@...cle.com,
	ghandatmanas@...il.com, jack@...e.cz,
	jfs-discussion@...ts.sourceforge.net, linux-fsdevel@...r.kernel.org,
	linux-kernel-mentees@...ts.linuxfoundation.org,
	linux-kernel@...r.kernel.org, shaggy@...nel.org,
	syzkaller-bugs@...glegroups.com, syzkaller@...glegroups.com
Subject: Re: [syzbot] [jfs?] UBSAN: array-index-out-of-bounds in diWrite

On Sat 13-01-24 23:18:05, 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=17ec162be80000
> start commit:   493ffd6605b2 Merge tag 'ucount-rlimits-cleanups-for-v5.19'..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=d19f5d16783f901
> dashboard link: https://syzkaller.appspot.com/bug?extid=c1056fdfe414463fdb33
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12f431d2880000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1208894a880000
> 
> If the result looks correct, please mark the issue as fixed by replying with:

Makes sense:

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

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