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

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Message-ID: <579d6d81-4f24-16e4-ee56-11089eae0164@kernel.dk>
Date:   Tue, 24 Jan 2023 09:37:21 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     Miklos Szeredi <miklos@...redi.hu>
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com,
        syzbot <syzbot+d3b704fabd7f02206294@...kaller.appspotmail.com>,
        io-uring@...r.kernel.org
Subject: Re: [syzbot] KASAN: use-after-free Read in fuse_dev_poll

On 1/24/23 9:29 AM, Miklos Szeredi wrote:
> Hi Jens,
> 
> Forwarding, since it looks like io_uring is the culprit: vfs_poll() is
> called by io_poll_check_events() on an already released file.

We had a bad patch around that time, pretty sure that's what's
triggering this one too as it's not a recent kernel.

#syz invalid

-- 
Jens Axboe