package/kernel/mac80211/patches/310-v4.16-ath9k-discard-undersized-packets.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Wed, 17 Jan 2018 11:11:17 +0100
   3 Subject: [PATCH] ath9k: discard undersized packets
   4
   5 Sometimes the hardware will push small packets that trigger a WARN_ON
   6 in mac80211. Discard them early to avoid this issue.
   7
   8 Reported-by: Stijn Tintel <stijn@linux-ipv6.be>
   9 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  10 ---
  11
  12 --- a/drivers/net/wireless/ath/ath9k/recv.c
  13 +++ b/drivers/net/wireless/ath/ath9k/recv.c
  14 @@ -826,9 +826,9 @@ static int ath9k_rx_skb_preprocess(struc
  15         sc->rx.discard_next = false;
  16
  17         /*
  18 -        * Discard zero-length packets.
  19 +        * Discard zero-length packets and packets smaller than an ACK
  20          */
  21 -       if (!rx_stats->rs_datalen) {
  22 +       if (rx_stats->rs_datalen < 10) {
  23                 RX_STAT_INC(rx_len_err);
  24                 goto corrupt;
  25         }