From: Jens Axboe <axboe@kernel.dk>
To: antonius <bluedragonsec2023@gmail.com>, io-uring@vger.kernel.org
Cc: asml.silence@gmail.com, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: Re: [BUG] WARNING in io_ring_exit_work (io_uring.c:2187) via IORING_REGISTER_BPF_FILTER — confirmed on 7.0-rc5 and rc6
Date: Tue, 31 Mar 2026 07:39:00 -0600 [thread overview]
Message-ID: <a85f11a8-7014-4b01-b35e-69974319f425@kernel.dk> (raw)
In-Reply-To: <CAK8a0jzF-zaO5ZmdOrmfuxrhXuKg5m5+RDuO7tNvtj=kUYbW7Q@mail.gmail.com>
On 3/31/26 7:32 AM, antonius wrote:
> Hello,
>
> I am reporting a kernel WARNING discovered via Syzkaller fuzzing of Linux
> 7.0-rc5, targeting the new IORING_REGISTER_BPF_FILTER subsystem (new in 7.0).
>
> The bug is confirmed on both 7.0-rc5 and 7.0-rc6. It is NOT fixed in rc6.
> In rc6, the WARNING appears to have changed from WARN_ON to WARN_ON_ONCE
> (fires only once per boot), which may explain why it was initially missed.
Interesting, that's why I added those WARN_ON's. I'll take a look
at this.
And yes, they would only fire once, because are WARN_ON_ONCE()...
--
Jens Axboe
next prev parent reply other threads:[~2026-03-31 13:39 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-31 13:32 [BUG] WARNING in io_ring_exit_work (io_uring.c:2187) via IORING_REGISTER_BPF_FILTER — confirmed on 7.0-rc5 and rc6 antonius
2026-03-31 13:39 ` Jens Axboe [this message]
2026-03-31 14:21 ` Jens Axboe
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