From f8cbbb224b11c142c6621bd195a59103d119ee3c Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Fri, 15 Sep 2023 13:06:27 -0700 Subject: [PATCH] wifi: wcn36xx: Annotate struct wcn36xx_hal_ind_msg with __counted_by 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 wcn36xx_hal_ind_msg. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Loic Poulain Cc: Kalle Valo Cc: wcn36xx@lists.infradead.org Cc: linux-wireless@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20230915200622.never.820-kees@kernel.org --- drivers/net/wireless/ath/wcn36xx/smd.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/wcn36xx/smd.h b/drivers/net/wireless/ath/wcn36xx/smd.h index cf15cde2a364..2c1ed9e570bf 100644 --- a/drivers/net/wireless/ath/wcn36xx/smd.h +++ b/drivers/net/wireless/ath/wcn36xx/smd.h @@ -47,7 +47,7 @@ struct wcn36xx_fw_msg_status_rsp { struct wcn36xx_hal_ind_msg { struct list_head list; size_t msg_len; - u8 msg[]; + u8 msg[] __counted_by(msg_len); }; struct wcn36xx;