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ath9k: discard undersized packets

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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 <stijn@linux-ipv6.be>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2018-01-17 12:32:22 +01:00
parent bdc412941a
commit e2c0e904c0
1 changed files with 25 additions and 0 deletions
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package/kernel/mac80211/patches/322-ath9k-discard-undersized-packets.patch Normal file
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@ -0,0 +1,25 @@
From: Felix Fietkau <nbd@nbd.name>
Date: Wed, 17 Jan 2018 11:11:17 +0100
Subject: [PATCH] ath9k: discard undersized packets
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 <stijn@linux-ipv6.be>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
--- 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(struc
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;
}