linux-kernel - Re: [syzbot] [ntfs3?] KASAN: use-after-free Read in ntfs_read

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Message-ID: <20240314105721.q2xd5zq3st7awjfh@quack3>
Date: Thu, 14 Mar 2024 11:57:21 +0100
From: Jan Kara <jack@...e.cz>
To: syzbot <syzbot+d3cd38158cd7c8d1432c@...kaller.appspotmail.com>
Cc: almaz.alexandrovich@...agon-software.com, anton@...era.com,
	axboe@...nel.dk, brauner@...nel.org, jack@...e.cz,
	linkinjeon@...nel.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-ntfs-dev@...ts.sourceforge.net,
	ntfs3@...ts.linux.dev, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [ntfs3?] KASAN: use-after-free Read in ntfs_read_folio

On Tue 27-02-24 03:50:04, 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=15a70f4a180000
> start commit:   ac865f00af29 Merge tag 'pci-v6.7-fixes-2' of git://git.ker..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=655f8abe9fe69b3b
> dashboard link: https://syzkaller.appspot.com/bug?extid=d3cd38158cd7c8d1432c
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12769ba5e80000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10c2b97ee80000
> 
> If the result looks correct, please mark the issue as fixed by replying with:

No working reproducer so:

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

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