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mac80211: mesh: drop frames appearing to be from us 

Upstream backport to fix issues arising from devices with duplicate MAC
addresses

Signed-off-by: Felix Fietkau <nbd@nbd.name>
openwrt-18.06
Felix Fietkau 2018-01-19 18:34:10 +01:00
parent 21d3643828
commit 166741240a
1 changed files with 25 additions and 0 deletions
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From: Johannes Berg <johannes.berg@intel.com>
Date: Thu, 4 Jan 2018 15:51:53 +0100
Subject: [PATCH] mac80211: mesh: drop frames appearing to be from us
If there are multiple mesh stations with the same MAC address,
they will both get confused and start throwing warnings.
Obviously in this case nothing can actually work anyway, so just
drop frames that look like they're from ourselves early on.
Reported-by: Gui Iribarren <gui@altermundi.net>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -3632,6 +3632,8 @@ static bool ieee80211_accept_frame(struc
}
return true;
case NL80211_IFTYPE_MESH_POINT:
+ if (ether_addr_equal(sdata->vif.addr, hdr->addr2))
+ return false;
if (multicast)
return true;
return ether_addr_equal(sdata->vif.addr, hdr->addr1);