linux-kernel - Re: [syzbot] [udf?] KASAN: use-after-free Write in udf_close

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Date: Mon, 19 Feb 2024 12:51:22 +0100
From: Jan Kara <jack@...e.cz>
To: syzbot <syzbot+60864ed35b1073540d57@...kaller.appspotmail.com>
Cc: akpm@...ux-foundation.org, alden.tondettar@...il.com, axboe@...nel.dk,
	brauner@...nel.org, dvyukov@...gle.com, hch@...radead.org,
	hdanton@...a.com, jack@...e.com, jack@...e.cz,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	pali@...nel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [udf?] KASAN: use-after-free Write in udf_close_lvid

On Sun 18-02-24 10:20:04, 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=12c941c2180000
> start commit:   f016f7547aee Merge tag 'gpio-fixes-for-v6.7-rc8' of git://..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=f8e72bae38c079e4
> dashboard link: https://syzkaller.appspot.com/bug?extid=60864ed35b1073540d57
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13c2caf9e80000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11f518f9e80000
> 
> If the result looks correct, please mark the issue as fixed by replying with:

Yes, this was expected :)
 
#syz fix: fs: Block writes to mounted block devices

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