linux-kernel - Re: [PATCH io_uring-5.17 v2] io_uring: Clean up a false-positive warning from GCC 9.3.0

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Date:   Mon, 07 Feb 2022 08:38:22 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     Ammar Faizi <ammarfaizi2@...weeb.org>
Cc:     "Chen, Rong A" <rong.a.chen@...el.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Alviro Iskandar Setiawan <alviro.iskandar@...il.com>,
        io-uring Mailing list <io-uring@...r.kernel.org>,
        GNU/Weeb Mailing List <gwml@...weeb.org>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Pavel Begunkov <asml.silence@...il.com>,
        Tea Inside Mailing List <timl@...r.teainside.org>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH io_uring-5.17 v2] io_uring: Clean up a false-positive warning from GCC 9.3.0

On Mon, 7 Feb 2022 21:05:33 +0700, Ammar Faizi wrote:
> From: Alviro Iskandar Setiawan <alviro.iskandar@...il.com>
> 
> In io_recv(), if import_single_range() fails, the @flags variable is
> uninitialized, then it will goto out_free.
> 
> After the goto, the compiler doesn't know that (ret < min_ret) is
> always true, so it thinks the "if ((flags & MSG_WAITALL) ..."  path
> could be taken.
> 
> [...]

Applied, thanks!

[1/1] io_uring: Clean up a false-positive warning from GCC 9.3.0
      commit: 0d7c1153d9291197c1dc473cfaade77acb874b4b

Best regards,
-- 
Jens Axboe