package/kernel/mac80211/patches/subsys/312-wifi-cfg80211-move-A-MSDU-check-in-ieee80211_data_to.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Fri, 2 Dec 2022 13:53:11 +0100
   3 Subject: [PATCH] wifi: cfg80211: move A-MSDU check in
   4  ieee80211_data_to_8023_exthdr
   5
   6 When parsing the outer A-MSDU header, don't check for inner bridge tunnel
   7 or RFC1042 headers. This is handled by ieee80211_amsdu_to_8023s already.
   8
   9 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  10 ---
  11
  12 --- a/net/wireless/util.c
  13 +++ b/net/wireless/util.c
  14 @@ -631,8 +631,9 @@ int ieee80211_data_to_8023_exthdr(struct
  15                 break;
  16         }
  17
  18 -       if (likely(skb_copy_bits(skb, hdrlen, &payload, sizeof(payload)) == 0 &&
  19 -                  ((!is_amsdu && ether_addr_equal(payload.hdr, rfc1042_header) &&
  20 +       if (likely(!is_amsdu &&
  21 +                  skb_copy_bits(skb, hdrlen, &payload, sizeof(payload)) == 0 &&
  22 +                  ((ether_addr_equal(payload.hdr, rfc1042_header) &&
  23                      payload.proto != htons(ETH_P_AARP) &&
  24                      payload.proto != htons(ETH_P_IPX)) ||
  25                     ether_addr_equal(payload.hdr, bridge_tunnel_header)))) {