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Message-Id: <201004050457.o354v6ec008492@94.43.138.210.xn.2iij.net>
Date: Mon, 5 Apr 2010 12:59:30 +0900
From: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
To: davem@...emloft.net
CC: jpirko@...hat.com, yoshfuji@...ux-ipv6.org, netdev@...r.kernel.org
Subject: [PATCH] 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@...ux-ipv6.org>
---
net/mac80211/main.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
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 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
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);
--
1.5.6.5
--
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