linux-kernel - Re: [PATCH] io_uring/uring_cmd: add missing READ

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Message-Id: <173757472950.267317.14676213787840454554.b4-ty@kernel.dk>
Date: Wed, 22 Jan 2025 12:38:49 -0700
From: Jens Axboe <axboe@...nel.dk>
To: Pavel Begunkov <asml.silence@...il.com>, Jann Horn <jannh@...gle.com>
Cc: io-uring@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] io_uring/uring_cmd: add missing READ_ONCE() on shared
 memory read


On Tue, 21 Jan 2025 17:09:59 +0100, Jann Horn wrote:
> cmd->sqe seems to point to shared memory here; so values should only be
> read from it with READ_ONCE(). To ensure that the compiler won't generate
> code that assumes the value in memory will stay constant, add a
> READ_ONCE().
> The callees io_uring_cmd_getsockopt() and io_uring_cmd_setsockopt() already
> do this correctly.
> 
> [...]

Applied, thanks!

[1/1] io_uring/uring_cmd: add missing READ_ONCE() on shared memory read
      commit: 0963dba3dc006b454c54fd019bbbdb931e7a7c70

Best regards,
-- 
Jens Axboe