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Commit 2f787b0b authored by YOSHIFUJI Hideaki / 吉藤英明's avatar YOSHIFUJI Hideaki / 吉藤英明 Committed by David S. Miller
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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 22bedad3.. ("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: default avatarYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Reviewed-by: default avatarJiri Pirko <jpirko@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e4008276

net/mac80211/main.c

+3 −0
Original line number Original line Diff line number Diff line
@@ -388,6 +388,9 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 
	local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;

	local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;





	INIT_LIST_HEAD(&local->interfaces);

	INIT_LIST_HEAD(&local->interfaces);



	__hw_addr_init(&local->mc_list);



	mutex_init(&local->iflist_mtx);

	mutex_init(&local->iflist_mtx);

	mutex_init(&local->scan_mtx);

	mutex_init(&local->scan_mtx);