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> --- 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 { -- 2.34.1
