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| author | Johannes Berg <johannes.berg@intel.com> | 2017-02-27 09:38:11 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2017-02-28 07:42:05 +0100 |
| commit | 19d19e960598161be92a7e4828eb7706c6410ce6 (patch) | |
| tree | 883afa1a2e507d58d32c5340b73a3fb2be40d574 | |
| parent | ff4dd73dd2b4806419f8ff65cbce11d5019548d0 (diff) | |
| download | linux-19d19e960598161be92a7e4828eb7706c6410ce6.tar.gz linux-19d19e960598161be92a7e4828eb7706c6410ce6.tar.bz2 linux-19d19e960598161be92a7e4828eb7706c6410ce6.zip | |
mac80211: use driver-indicated transmitter STA only for data frames
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.
Cc: stable@vger.kernel.org
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>
| -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 28cc494a774d..e48724a6725e 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -4086,15 +4086,17 @@ 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) { |