Subject: Re: [PATCH v2] ar5523: check NULL before memcpy() in ar5523_cmd()

From: Kalle Valo <[email-masked]>
Date: Wed, 2 Oct 2019 17:22:08 +0000 (UTC)

Denis Efremov <[email-masked]> wrote:

> memcpy() call with "idata == NULL && ilen == 0" results in undefined
> behavior in ar5523_cmd(). For example, NULL is passed in callchain
> "ar5523_stat_work() -> ar5523_cmd_write() -> ar5523_cmd()". This patch
> adds ilen check before memcpy() call in ar5523_cmd() to prevent an
> undefined behavior.
> 
> Cc: Pontus Fuchs <[email-masked]>
> Cc: Kalle Valo <[email-masked]>
> Cc: "David S. Miller" <[email-masked]>
> Cc: David Laight <[email-masked]>
> Cc: [email-masked]
> Signed-off-by: Denis Efremov <[email-masked]>
> Signed-off-by: Kalle Valo <[email-masked]>

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

315cee426f87 ar5523: check NULL before memcpy() in ar5523_cmd()

-- 
https://patchwork.kernel.org/patch/11167401/

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