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 mt76_rx_tid. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Felix Fietkau <[email protected]> Cc: Lorenzo Bianconi <[email protected]> Cc: Ryder Lee <[email protected]> Cc: Shayne Chen <[email protected]> Cc: Sean Wang <[email protected]> Cc: Kalle Valo <[email protected]> Cc: Matthias Brugger <[email protected]> Cc: AngeloGioacchino Del Regno <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Signed-off-by: Kees Cook <[email protected]> --- drivers/net/wireless/mediatek/mt76/mt76.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h index e8757865a3d0..03ef617b1527 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76.h +++ b/drivers/net/wireless/mediatek/mt76/mt76.h @@ -376,7 +376,7 @@ struct mt76_rx_tid { u8 started:1, stopped:1, timer_pending:1; - struct sk_buff *reorder_buf[]; + struct sk_buff *reorder_buf[] __counted_by(size); }; #define MT_TX_CB_DMA_DONE BIT(0) -- 2.34.1
