linux-hardening - Re: [PATCH][next] wifi: mwifiex: Fix memcpy() field-spanning write warning in mwifiex_cmd_802_11_scan

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Message-ID: <Zsc8G-c6xW982XLU@smile.fi.intel.com>
Date: Thu, 22 Aug 2024 16:24:43 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: Brian Norris <briannorris@...omium.org>,
	Francesco Dolcini <francesco@...cini.it>,
	Kalle Valo <kvalo@...nel.org>, linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH][next] wifi: mwifiex: Fix memcpy() field-spanning write
 warning in mwifiex_cmd_802_11_scan_ext()

On Wed, Aug 21, 2024 at 03:23:51PM -0600, Gustavo A. R. Silva wrote:
> Replace one-element array with a flexible-array member in
> `struct host_cmd_ds_802_11_scan_ext`.
> 
> With this, fix the following warning:
> 
> elo 16 17:51:58 surfacebook kernel: ------------[ cut here ]------------
> elo 16 17:51:58 surfacebook kernel: memcpy: detected field-spanning write (size 243) of single field "ext_scan->tlv_buffer" at drivers/net/wireless/marvell/mwifiex/scan.c:2239 (size 1)
> elo 16 17:51:58 surfacebook kernel: WARNING: CPU: 0 PID: 498 at drivers/net/wireless/marvell/mwifiex/scan.c:2239 mwifiex_cmd_802_11_scan_ext+0x83/0x90 [mwifiex]

Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Thank you!

-- 
With Best Regards,
Andy Shevchenko