Commit d35d1375 authored by Sven Eckelmann's avatar Sven Eckelmann Committed by Kalle Valo
Browse files

ath11k: Build check size of ath11k_skb_cb 



It is rather easy to add more entries to ath11k_skb_cb while forgetting the
size limit of ieee80211_tx_info->driver_data. So just check this during the
build to reduce the change of accidental buffer overflow in the skbuff->cb.

Signed-off-by: default avatarSven Eckelmann <sven@narfation.org>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20201119154235.263250-3-sven@narfation.org
parent 5da7acfe

drivers/net/wireless/ath/ath11k/core.h

+2 −0
Original line number Diff line number Diff line
@@ -909,6 +909,8 @@ static inline const char *ath11k_scan_state_str(enum ath11k_scan_state state) 


static inline struct ath11k_skb_cb *ATH11K_SKB_CB(struct sk_buff *skb)

{

	BUILD_BUG_ON(sizeof(struct ath11k_skb_cb) >

		     IEEE80211_TX_INFO_DRIVER_DATA_SIZE);

	return (struct ath11k_skb_cb *)&IEEE80211_SKB_CB(skb)->driver_data;

}