linux-kernel - Re: [PATCH liburing v1 0/2] 2 fixes for recv-msgall.c

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Date:   Wed, 10 May 2023 09:17:52 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Ammar Faizi <ammarfaizi2@...weeb.org>
Cc:     Barnabás Pőcze <pobrn@...tonmail.com>,
        Michael William Jonathan <moe@...weeb.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        io-uring Mailing List <io-uring@...r.kernel.org>,
        GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>
Subject: Re: [PATCH liburing v1 0/2] 2 fixes for recv-msgall.c


On Wed, 10 May 2023 21:39:25 +0700, Ammar Faizi wrote:
> This is the follow up patchset for the recent issue found in
> recv-msgall.c. There are two patches in this series.
> 
> 1. Fix undefined behavior in `recv_prep()`.
> The lifetime of `struct msghdr msg;` must be long enough until the CQE
> is generated because the recvmsg operation will write to that storage. I
> found this test segfault when compiling with -O0 optimization. This is
> undefined behavior and may behave randomly. Fix this by making the
> lifetime of `struct msghdr msg;` long enough.
> 
> [...]

Applied, thanks!

[1/2] recv-msgall: Fix undefined behavior in `recv_prep()`
      commit: 05c6317367cab6fd4b8cf38c68cea1563bf31c5f
[2/2] recv-msgall: Fix invalid mutex usage
      commit: 09c3661278bebb8431fbc10ed213e42181e7cac7

Best regards,
-- 
Jens Axboe