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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=a85f11a8-7014-4b01-b35e-69974319f425@kernel.dk \
--to=axboe@kernel.dk \
--cc=asml.silence@gmail.com \
--cc=bluedragonsec2023@gmail.com \
--cc=io-uring@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=syzkaller-bugs@googlegroups.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.