On 9/15/23 14:06, 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 wcn36xx_hal_ind_msg.
[1]
https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Loic Poulain <[email protected]>
Cc: Kalle Valo <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Kees Cook <[email protected]>
Reviewed-by: Gustavo A. R. Silva <[email protected]>
Thanks
--
Gustavo
---
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;
