mac80211: Ensure initializing private mc_list in prepare_multicast().
Fix kernel panic by NULL pointer dereference in the context of
ieee80211_ops->prepare_multicast().
This bug was introduced by commit 22bedad3c.. ("net: convert
multicast list to list_head").
Call __hw_addr_init() in ieee80211_alloc_hw() to initialize
list_head of private device multicast list, like we do in
bond_init().
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Reviewed-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 84ad249..0b82cd2 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -388,6 +388,9 @@
local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
INIT_LIST_HEAD(&local->interfaces);
+
+ __hw_addr_init(&local->mc_list);
+
mutex_init(&local->iflist_mtx);
mutex_init(&local->scan_mtx);