openwrtv4/package/kernel/mac80211/patches/388-mac80211-fix-an-off-by-one-issue-in-A-MSDU-max_subfr.patch
Koen Vandeputte 77024a9d95 mac80211: backport upstream fixes
Backport most significant upstream fixes (excl. hwsim fixes)
Refreshed all patches.

Contains important fixes for CSA (Channel Switch Announcement)
and A-MSDU frames.

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
2018-09-07 17:21:24 +02:00

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Diff

From: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Date: Fri, 31 Aug 2018 01:04:13 +0200
Subject: [PATCH] mac80211: fix an off-by-one issue in A-MSDU
max_subframe computation
Initialize 'n' to 2 in order to take into account also the first
packet in the estimation of max_subframe limit for a given A-MSDU
since frag_tail pointer is NULL when ieee80211_amsdu_aggregate
routine analyzes the second frame.
Fixes: 6e0456b54545 ("mac80211: add A-MSDU tx support")
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -3166,7 +3166,7 @@ static bool ieee80211_amsdu_aggregate(st
void *data;
bool ret = false;
unsigned int orig_len;
- int n = 1, nfrags, pad = 0;
+ int n = 2, nfrags, pad = 0;
u16 hdrlen;
if (!ieee80211_hw_check(&local->hw, TX_AMSDU))