From: Paul Fertser <fercerpav@gmail.com>
Date: Fri, 16 Oct 2020 20:24:19 +0000 (+0300)
Subject: mac80211: fix MAC address allocations when local bit set on base addr
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=39c8bc4422f0404af5b85c10eeb2c4098d919cdb;p=openwrt%2Fstaging%2Fthess.git

mac80211: fix MAC address allocations when local bit set on base addr

Testing with hwsim reveals two problems:

1. phyX/addresses has two addresses and mac80211_get_addr keeps
returning the last one when asked for more;

2. The base address has the local bit set and the operation unsets it.

Fix both.

Fixes: 866790fd827cb0187353cdf484eb46a9b38fb6ba
Reported-by: Zero_Chaos
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
---

diff --git a/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh b/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
index 6ca12084cf..e12a804271 100644
--- a/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
+++ b/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
@@ -409,7 +409,7 @@ mac80211_generate_mac() {
 	[ "$mask" = "00:00:00:00:00:00" ] && {
 		mask="ff:ff:ff:ff:ff:ff";
 
-		[ "$(wc -l < /sys/class/ieee80211/${phy}/addresses)" -gt 1 ] && {
+		[ "$(wc -l < /sys/class/ieee80211/${phy}/addresses)" -gt $id ] && {
 			addr="$(mac80211_get_addr "$phy" "$id")"
 			[ -n "$addr" ] && {
 				echo "$addr"
@@ -429,7 +429,7 @@ mac80211_generate_mac() {
 	[ "$((0x$mask1))" -gt 0 ] && {
 		b1="0x$1"
 		[ "$id" -gt 0 ] && \
-			b1=$(($b1 ^ ((($id - !($b1 & 2)) << 2) | 0x2)))
+			b1=$(($b1 ^ ((($id - !($b1 & 2)) << 2)) | 0x2))
 		printf "%02x:%s:%s:%s:%s:%s" $b1 $2 $3 $4 $5 $6
 		return
 	}