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Message-ID: <cfd01e87-6edc-2547-894a-72e7cd5ba9ef@embeddedor.com>
Date: Thu, 30 Mar 2023 14:09:20 -0600
From: "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>,
Jussi Kivilinna <jussi.kivilinna@....fi>,
Kalle Valo <kvalo@...nel.org>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
Cc: linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH][next] wifi: rndis_wlan: Replace fake flex-array with
flexible-array member
Hi all,
Friendly ping: who can take this, please? 😄
Thanks
--
Gustavo
On 3/22/23 12:26, Gustavo A. R. Silva wrote:
> Zero-length arrays as fake flexible arrays are deprecated and we are
> moving towards adopting C99 flexible-array members instead.
>
> Address the following warning found with GCC-13 and
> -fstrict-flex-array=3 enabled:
> drivers/net/wireless/rndis_wlan.c:2902:23: warning: array subscript 0 is outside array bounds of ‘struct ndis_80211_auth_request[0]’ [-Warray-bounds=]
>
> This helps with the ongoing efforts to tighten the FORTIFY_SOURCE
> routines on memcpy() and help us make progress towards globally
> enabling -fstrict-flex-arrays=3 [1].
>
> Link: https://github.com/KSPP/linux/issues/21
> Link: https://github.com/KSPP/linux/issues/274
> Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1]
> Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
> ---
> drivers/net/wireless/legacy/rndis_wlan.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/wireless/legacy/rndis_wlan.c b/drivers/net/wireless/legacy/rndis_wlan.c
> index bf72e5fd39cf..54c347fa54c4 100644
> --- a/drivers/net/wireless/legacy/rndis_wlan.c
> +++ b/drivers/net/wireless/legacy/rndis_wlan.c
> @@ -209,7 +209,7 @@ struct ndis_80211_status_indication {
> union {
> __le32 media_stream_mode;
> __le32 radio_status;
> - struct ndis_80211_auth_request auth_request[0];
> + DECLARE_FLEX_ARRAY(struct ndis_80211_auth_request, auth_request);
> struct ndis_80211_pmkid_cand_list cand_list;
> } u;
> } __packed;
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