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

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Message-ID: <20240209114514.exbuygzal4ghfkat@quack3>
Date: Fri, 9 Feb 2024 12:45:14 +0100
From: Jan Kara <jack@...e.cz>
To: syzbot <syzbot+4b52080e97cde107939d@...kaller.appspotmail.com>
Cc: axboe@...nel.dk, brauner@...nel.org, jack@...e.cz,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [hfs?] KASAN: slab-use-after-free Read in
 hfsplus_read_wrapper

On Fri 09-02-24 01:42:03, 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=15065d50180000
> start commit:   88035e5694a8 Merge tag 'hid-for-linus-2023121201' of git:/..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=be2bd0a72b52d4da
> dashboard link: https://syzkaller.appspot.com/bug?extid=4b52080e97cde107939d
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=148fa88ae80000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15067cc6e80000
> 
> 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