wifi: cfg80211: move A-MSDU check in ieee80211_data_to_8023_exthdr

When parsing the outer A-MSDU header, don't check for inner bridge tunnel
or RFC1042 headers. This is handled by ieee80211_amsdu_to_8023s already.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20230213100855.34315-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/wireless/util.c b/net/wireless/util.c
index 38d3b43..430962f 100644 (file)
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -631,8 +631,9 @@ int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr,
                break;
        }
 
-       if (likely(skb_copy_bits(skb, hdrlen, &payload, sizeof(payload)) == 0 &&
-                  ((!is_amsdu && ether_addr_equal(payload.hdr, rfc1042_header) &&
+       if (likely(!is_amsdu &&
+                  skb_copy_bits(skb, hdrlen, &payload, sizeof(payload)) == 0 &&
+                  ((ether_addr_equal(payload.hdr, rfc1042_header) &&
                     payload.proto != htons(ETH_P_AARP) &&
                     payload.proto != htons(ETH_P_IPX)) ||
                    ether_addr_equal(payload.hdr, bridge_tunnel_header)))) {