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

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Date: Mon, 11 Mar 2024 10:25:07 +0100
From: Jan Kara <jack@...e.cz>
To: syzbot <syzbot+0b7937459742a0a4cffd@...kaller.appspotmail.com>
Cc: akpm@...ux-foundation.org, axboe@...nel.dk, brauner@...nel.org,
	eadavis@...com, hch@....de, jack@...e.com, jack@...e.cz,
	linkinjeon@...il.com, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	syzkaller-bugs@...glegroups.com, willy@...radead.org
Subject: Re: [syzbot] [udf?] KASAN: slab-use-after-free Read in
 udf_free_blocks

On Sat 02-03-24 07:19:04, 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=11030516180000
> start commit:   f8dba31b0a82 Merge tag 'asym-keys-fix-for-linus-v6.4-rc5' ..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=3c980bfe8b399968
> dashboard link: https://syzkaller.appspot.com/bug?extid=0b7937459742a0a4cffd
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10bcb6b5280000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12fbcfd1280000
> 
> 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