linux-kernel - Re: [PATCH] wifi: wil6210: debugfs: fix uninitialized variable use in `wil_write_file

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Date:   Wed, 27 Jul 2022 10:20:42 +0000 (UTC)
From:   Kalle Valo <kvalo@...nel.org>
To:     Ammar Faizi <ammarfaizi2@...weeb.org>
Cc:     Ammar Faizi <ammarfaizi2@...weeb.org>,
        Kalle Valo <quic_kvalo@...cinc.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Johannes Berg <johannes.berg@...el.com>,
        Linux Wireless Mailing List <linux-wireless@...r.kernel.org>,
        netdev Mailing List <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
        llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] wifi: wil6210: debugfs: fix uninitialized variable use in
 `wil_write_file_wmi()`

Ammar Faizi <ammarfaizi2@...weeb.org> wrote:

> Commit 7a4836560a61 changes simple_write_to_buffer() with memdup_user()
> but it forgets to change the value to be returned that came from
> simple_write_to_buffer() call. It results in the following warning:
> 
>   warning: variable 'rc' is uninitialized when used here [-Wuninitialized]
>            return rc;
>                   ^~
> 
> Remove rc variable and just return the passed in length if the
> memdup_user() succeeds.
> 
> Cc: Dan Carpenter <dan.carpenter@...cle.com>
> Reported-by: kernel test robot <lkp@...el.com>
> Fixes: 7a4836560a6198d245d5732e26f94898b12eb760 ("wifi: wil6210: debugfs: fix info leak in wil_write_file_wmi()")
> Fixes: ff974e4083341383d3dd4079e52ed30f57f376f0 ("wil6210: debugfs interface to send raw WMI command")
> Signed-off-by: Ammar Faizi <ammarfaizi2@...weeb.org>
> Reviewed-by: Dan Carpenter <dan.carpenter@...cle.com>
> Signed-off-by: Kalle Valo <quic_kvalo@...cinc.com>

Patch applied to ath-next branch of ath.git, thanks.

d578e0af3a00 wifi: wil6210: debugfs: fix uninitialized variable use in `wil_write_file_wmi()`

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20220724202452.61846-1-ammar.faizi@intel.com/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches