linux-hardening - Re: [PATCH v2][next] wifi: wil6210: wmi: Use __counted_by() in struct wmi_set_link_monitor

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Date: Mon, 29 Apr 2024 10:10:46 -0700
From: Kees Cook <keescook@...omium.org>
To: Kalle Valo <kvalo@...nel.org>
Cc: "Gustavo A. R. Silva" <gustavoars@...nel.org>,
	Jeff Johnson <quic_jjohnson@...cinc.com>,
	linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-hardening@...r.kernel.org
Subject: Re: [PATCH v2][next] wifi: wil6210: wmi: Use __counted_by() in
 struct wmi_set_link_monitor_cmd and avoid -Wfamnae warning

On Thu, Apr 04, 2024 at 10:12:28AM +0000, Kalle Valo wrote:
> "Gustavo A. R. Silva" <gustavoars@...nel.org> wrote:
> 
> > Prepare for the coming implementation by GCC and Clang of the
> > __counted_by attribute. Flexible array members annotated with
> > __counted_by can have their accesses bounds-checked at run-time
> > via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE
> > (for strcpy/memcpy-family functions).
> > 
> > Also, -Wflex-array-member-not-at-end is coming in GCC-14, and we are
> > getting ready to enable it globally.
> > 
> > So, use the `DEFINE_FLEX()` helper for an on-stack definition of
> > a flexible structure where the size of the flexible-array member
> > is known at compile-time, and refactor the rest of the code,
> > accordingly.
> > 
> > So, with these changes, fix the following warning:
> > drivers/net/wireless/ath/wil6210/wmi.c:4018:49: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
> > 
> > Link: https://github.com/KSPP/linux/issues/202
> > Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
> > Reviewed-by: Jeff Johnson <quic_jjohnson@...cinc.com>
> > Signed-off-by: Kalle Valo <quic_kvalo@...cinc.com>
> 
> Patch applied to ath-next branch of ath.git, thanks.
> 
> cbb0697e0ded wifi: wil6210: wmi: Use __counted_by() in struct wmi_set_link_monitor_cmd and avoid -Wfamnae warning

Hi,

I was just walking through our patch tracker and noticed that I don't
see this patch include in -next yet (as of next-20240429). Is there a
flush of the ath-next queue planned soon? Or did I miss some change?

Thanks!

-Kees

-- 
Kees Cook