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| author | Johannes Berg <johannes.berg@intel.com> | 2017-02-27 09:38:11 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-15 10:02:48 +0800 |
| commit | b507df2e236e5edc868ea8ac572567f1de0107f7 (patch) | |
| tree | 5c31791fd7d90aa0510b235a2eec217cf0fb3327 /net/mac80211 | |
| parent | 39813849996f96a764df9b993ba726e995aa1dda (diff) | |
| download | linux-stable-b507df2e236e5edc868ea8ac572567f1de0107f7.tar.gz linux-stable-b507df2e236e5edc868ea8ac572567f1de0107f7.tar.bz2 linux-stable-b507df2e236e5edc868ea8ac572567f1de0107f7.zip | |
mac80211: use driver-indicated transmitter STA only for data frames
commit 19d19e960598161be92a7e4828eb7706c6410ce6 upstream.
When I originally introduced using the driver-indicated station as an
optimisation to avoid the hashtable lookup/iteration, of course it
wasn't intended to really functionally change anything.
I neglected, however, to take into account VLAN interfaces, which have
the property that management and data frames are handled differently:
data frames go directly to the station and the VLAN while management
frames continue to be processed over the underlying/associated AP-type
interface. As a consequence, when a driver used this optimisation for
management frames and the user enabled VLANs, my change broke things
since any management frames, particularly disassoc/deauth, were missed
by hostapd.
Fix this by restoring the original code path for non-data frames, they
aren't critical for performance to begin with.
This fixes https://bugzilla.kernel.org/show_bug.cgi?id=194713.
Big thanks goes to Jarek who bisected the issue and provided a very
detailed bug report, including the crucial information that he was
using VLANs in his configuration.
Fixes: 771e846bea9e ("mac80211: allow passing transmitter station on RX")
Reported-and-tested-by: Jarek Kamiński <jarek@freeside.be>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/mac80211')
| -rw-r--r-- | net/mac80211/rx.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 8a344bd3b52a..a697ddf56334 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -4092,15 +4092,17 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, ieee80211_is_beacon(hdr->frame_control))) ieee80211_scan_rx(local, skb); - if (pubsta) { - rx.sta = container_of(pubsta, struct sta_info, sta); - rx.sdata = rx.sta->sdata; - if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) - return; - goto out; - } else if (ieee80211_is_data(fc)) { + if (ieee80211_is_data(fc)) { struct sta_info *sta, *prev_sta; + if (pubsta) { + rx.sta = container_of(pubsta, struct sta_info, sta); + rx.sdata = rx.sta->sdata; + if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) + return; + goto out; + } + prev_sta = NULL; for_each_sta_info(local, hdr->addr2, sta, tmp) { |