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 <loic.poul...@linaro.org> Cc: Kalle Valo <kv...@kernel.org> Cc: wcn3...@lists.infradead.org Cc: linux-wirel...@vger.kernel.org Signed-off-by: Kees Cook <keesc...@chromium.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; -- 2.34.1