From: Pavel Begunkov <asml.silence@gmail.com>
To: io-uring@vger.kernel.org
Cc: axboe@kernel.dk,
Google Big Sleep
<big-sleep-vuln-reports+bigsleep-458654612@google.com>
Subject: Re: [PATCH 1/1] io_uring: regbuf vector size truncation
Date: Fri, 7 Nov 2025 18:43:28 +0000 [thread overview]
Message-ID: <3338436a-bd36-4acd-a6f5-afb3d741b2a3@gmail.com> (raw)
In-Reply-To: <11fbc25aecfd5dcb722a757dfe5d3f676391c955.1762540764.git.asml.silence@gmail.com>
On 11/7/25 18:41, Pavel Begunkov wrote:
Should be "_fix_ regbuf vector size truncation" in the subject,
but I guess it doesn't matter.
> There is a report of io_estimate_bvec_size() truncating the calculated
> number of segments that leads to corruption issues. Check it doesn't
> overflow "int"s used later. Rough but simple, can be improved on top.
>
> Cc: stable@vger.kernel.org
> Fixes: 9ef4cbbcb4ac3 ("io_uring: add infra for importing vectored reg buffers")
> Reported-by: Google Big Sleep <big-sleep-vuln-reports+bigsleep-458654612@google.com>
> Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
--
Pavel Begunkov
next prev parent reply other threads:[~2025-11-07 18:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-07 18:41 [PATCH 1/1] io_uring: regbuf vector size truncation Pavel Begunkov
2025-11-07 18:43 ` Pavel Begunkov [this message]
2025-11-07 21:14 ` Günther Noack
2025-11-10 12:19 ` Pavel Begunkov
2025-11-08 0:17 ` Jens Axboe
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