From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from nbd.name ([46.4.11.11]:35728 "EHLO nbd.name" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750853AbeAQKOL (ORCPT ); Wed, 17 Jan 2018 05:14:11 -0500 From: Felix Fietkau To: linux-wireless@vger.kernel.org Cc: kvalo@codeaurora.org, stijn@linux-ipv6.be Subject: [PATCH] ath9k: discard undersized packets Date: Wed, 17 Jan 2018 11:14:05 +0100 Message-Id: <20180117101405.16700-1-nbd@nbd.name> (sfid-20180117_111415_581150_38C2EF19) Sender: linux-wireless-owner@vger.kernel.org List-ID: Sometimes the hardware will push small packets that trigger a WARN_ON in mac80211. Discard them early to avoid this issue. Reported-by: Stijn Tintel Signed-off-by: Felix Fietkau --- drivers/net/wireless/ath/ath9k/recv.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c index 2197aee2bb72..a8ac42c96d71 100644 --- a/drivers/net/wireless/ath/ath9k/recv.c +++ b/drivers/net/wireless/ath/ath9k/recv.c @@ -826,9 +826,9 @@ static int ath9k_rx_skb_preprocess(struct ath_softc *sc, sc->rx.discard_next = false; /* - * Discard zero-length packets. + * Discard zero-length packets and packets smaller than an ACK */ - if (!rx_stats->rs_datalen) { + if (rx_stats->rs_datalen < 10) { RX_STAT_INC(rx_len_err); goto corrupt; } -- 2.14.2