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authorAndreas Müller <goo@stapelspeicher.org>2014-12-12 12:11:11 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-01-08 10:00:49 -0800
commit57caf9bdf9d529e0c1100a0d04dc60e63d8472b1 (patch)
tree540089457ad043c53580f41c26d464ff39e603a7 /net
parent26090b176d22a611d8b0e7526f5aafd78b2f77d7 (diff)
mac80211: fix multicast LED blinking and counter
commit d025933e29872cb1fe19fc54d80e4dfa4ee5779c upstream. As multicast-frames can't be fragmented, "dot11MulticastReceivedFrameCount" stopped being incremented after the use-after-free fix. Furthermore, the RX-LED will be triggered by every multicast frame (which wouldn't happen before) which wouldn't allow the LED to rest at all. Fixes https://bugzilla.kernel.org/show_bug.cgi?id=89431 which also had the patch. Fixes: b8fff407a180 ("mac80211: fix use-after-free in defragmentation") Signed-off-by: Andreas Müller <goo@stapelspeicher.org> [rewrite commit message] Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
-rw-r--r--net/mac80211/rx.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 095c16037bc5..1e4dc4ed5e0d 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1679,14 +1679,14 @@ ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
sc = le16_to_cpu(hdr->seq_ctrl);
frag = sc & IEEE80211_SCTL_FRAG;
- if (likely(!ieee80211_has_morefrags(fc) && frag == 0))
- goto out;
-
if (is_multicast_ether_addr(hdr->addr1)) {
rx->local->dot11MulticastReceivedFrameCount++;
- goto out;
+ goto out_no_led;
}
+ if (likely(!ieee80211_has_morefrags(fc) && frag == 0))
+ goto out;
+
I802_DEBUG_INC(rx->local->rx_handlers_fragments);
if (skb_linearize(rx->skb))
@@ -1777,9 +1777,10 @@ ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
status->rx_flags |= IEEE80211_RX_FRAGMENTED;
out:
+ ieee80211_led_rx(rx->local);
+ out_no_led:
if (rx->sta)
rx->sta->rx_packets++;
- ieee80211_led_rx(rx->local);
return RX_CONTINUE;
}