lkml.org 
[lkml]   [2023]   [Sep]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH] wifi: brcmfmac: firmware: Annotate struct brcmf_fw_request with __counted_by
From


On 9/15/23 14:05, Kees Cook 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 checking via CONFIG_UBSAN_BOUNDS
> (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
> functions).
>
> As found with Coccinelle[1], add __counted_by for struct brcmf_fw_request.
>
> [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
>
> Cc: Arend van Spriel <aspriel@gmail.com>
> Cc: Franky Lin <franky.lin@broadcom.com>
> Cc: Hante Meuleman <hante.meuleman@broadcom.com>
> Cc: Kalle Valo <kvalo@kernel.org>
> Cc: Matthias Brugger <mbrugger@suse.com>
> Cc: Hector Martin <marcan@marcan.st>
> Cc: "Alvin Šipraga" <alsi@bang-olufsen.dk>
> Cc: Hans de Goede <hdegoede@redhat.com>
> Cc: linux-wireless@vger.kernel.org
> Cc: brcm80211-dev-list.pdl@broadcom.com
> Cc: SHA-cyfmac-dev-list@infineon.com
> Signed-off-by: Kees Cook <keescook@chromium.org>

Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>

Thanks
--
Gustavo

> ---
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.h
> index 1266cbaee072..4002d326fd21 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.h
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.h
> @@ -69,7 +69,7 @@ struct brcmf_fw_request {
> u16 bus_nr;
> u32 n_items;
> const char *board_types[BRCMF_FW_MAX_BOARD_TYPES];
> - struct brcmf_fw_item items[];
> + struct brcmf_fw_item items[] __counted_by(n_items);
> };
>
> struct brcmf_fw_name {

\
 
 \ /
  Last update: 2023-09-15 22:33    [W:0.069 / U:1.368 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site