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mac80211: redirect EAP frames on AP VLAN interfaces to the main AP interface to fix a bridging related race condition
SVN-Revision: 26016
This commit is contained in:
parent
ef12d2ba03
commit
0f6ddd5116
@ -0,0 +1,67 @@
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--- a/net/mac80211/rx.c
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+++ b/net/mac80211/rx.c
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@@ -1582,7 +1582,7 @@ ieee80211_drop_unencrypted_mgmt(struct i
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}
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static int
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-__ieee80211_data_to_8023(struct ieee80211_rx_data *rx)
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+__ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control)
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{
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struct ieee80211_sub_if_data *sdata = rx->sdata;
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
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@@ -1590,6 +1590,7 @@ __ieee80211_data_to_8023(struct ieee8021
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struct ethhdr *ehdr;
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int ret;
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+ *port_control = false;
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if (ieee80211_has_a4(hdr->frame_control) &&
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sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta)
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return -1;
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@@ -1608,11 +1609,14 @@ __ieee80211_data_to_8023(struct ieee8021
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return -1;
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ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type);
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- if (ret < 0 || !check_port_control)
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+ if (ret < 0)
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return ret;
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ehdr = (struct ethhdr *) rx->skb->data;
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- if (ehdr->h_proto != rx->sdata->control_port_protocol)
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+ if (ehdr->h_proto == rx->sdata->control_port_protocol)
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+ *port_control = true;
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+
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+ if (check_port_control && !*port_control)
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return -1;
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return 0;
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@@ -1913,6 +1917,7 @@ ieee80211_rx_h_data(struct ieee80211_rx_
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struct net_device *dev = sdata->dev;
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
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__le16 fc = hdr->frame_control;
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+ bool port_control;
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int err;
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if (unlikely(!ieee80211_is_data(hdr->frame_control)))
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@@ -1929,13 +1934,21 @@ ieee80211_rx_h_data(struct ieee80211_rx_
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sdata->vif.type == NL80211_IFTYPE_AP)
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return RX_DROP_MONITOR;
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- err = __ieee80211_data_to_8023(rx);
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+ err = __ieee80211_data_to_8023(rx, &port_control);
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if (unlikely(err))
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return RX_DROP_UNUSABLE;
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if (!ieee80211_frame_allowed(rx, fc))
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return RX_DROP_MONITOR;
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+ if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
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+ unlikely(port_control) && sdata->bss) {
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+ sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
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+ u.ap);
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+ dev = sdata->dev;
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+ rx->sdata = sdata;
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+ }
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+
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rx->skb->dev = dev;
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dev->stats.rx_packets++;
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