Re: [PATCH][next] wifi: mwifiex: Fix memcpy() field-spanning write warning in mwifiex_cmd_802_11_scan_ext()

[Kalle Valo]

"Gustavo A. R. Silva" <gustavoars@xxxxxxxxxx> 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]
> 
> Reported-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> Closes: https://lore.kernel.org/linux-hardening/ZsZNgfnEwOcPdCly@xxxxxxxxxxxxxxxxxx/
> Signed-off-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> Acked-by: Brian Norris <briannorris@xxxxxxxxxxxx>

Patch applied to wireless-next.git, thanks.

498365e52beb wifi: mwifiex: Fix memcpy() field-spanning write warning in mwifiex_cmd_802_11_scan_ext()

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/ZsZa5xRcsLq9D+RX@elsanto/

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