linux-kernel - Re: [syzbot] KASAN: use-after-free Read in post_one

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Message-ID: <Yumkx4Nc5ZyPGYMz@sol.localdomain>
Date:   Tue, 2 Aug 2022 15:27:19 -0700
From:   Eric Biggers <ebiggers@...nel.org>
To:     syzbot <syzbot+c70d87ac1d001f29a058@...kaller.appspotmail.com>
Cc:     code@...dh.me, hdanton@...a.com, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] KASAN: use-after-free Read in post_one_notification

On Mon, Aug 01, 2022 at 03:54:09AM -0700, syzbot wrote:
> Hello,
> 
> syzbot has tested the proposed patch and the reproducer did not trigger any issue:
> 
> Reported-and-tested-by: syzbot+c70d87ac1d001f29a058@...kaller.appspotmail.com
> 
> Tested on:
> 
> commit:         3d7cb6b0 Linux 5.19
> git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> console output: https://syzkaller.appspot.com/x/log.txt?x=14066d7a080000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=70dd99d568a89e0
> dashboard link: https://syzkaller.appspot.com/bug?extid=c70d87ac1d001f29a058
> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> 
> Note: no patches were applied.
> Note: testing is done by a robot and is best-effort only.

It appears this was already fixed, so no need for any more activity on this bug:

#syz fix: watchqueue: make sure to serialize 'wqueue->defunct' properly

- Eric