On 9/15/2023 1:06 PM, 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 ath10k_ce_ring.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Kalle Valo <kvalo@xxxxxxxxxx>
Cc: Jeff Johnson <quic_jjohnson@xxxxxxxxxxx>
Cc: ath10k@xxxxxxxxxxxxxxxxxxx
Cc: linux-wireless@xxxxxxxxxxxxxxx
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
Acked-by: Jeff Johnson <quic_jjohnson@xxxxxxxxxxx>
---
drivers/net/wireless/ath/ath10k/ce.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/ath10k/ce.h b/drivers/net/wireless/ath/ath10k/ce.h
index 666ce384a1d8..27367bd64e95 100644
--- a/drivers/net/wireless/ath/ath10k/ce.h
+++ b/drivers/net/wireless/ath/ath10k/ce.h
@@ -110,7 +110,7 @@ struct ath10k_ce_ring {
struct ce_desc_64 *shadow_base;
/* keep last */
- void *per_transfer_context[];
+ void *per_transfer_context[] __counted_by(nentries);
};
struct ath10k_ce_pipe {
