diff options
| author | Juuso Oikarinen <juuso.oikarinen@nokia.com> | 2010-06-07 07:52:12 (GMT) |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2010-06-08 13:31:21 (GMT) |
| commit | 90b726097ba0dcc1f9725182513e669a30e77db5 (patch) | |
| tree | 34e18b515c3f3d39b3f604ee2034441b85f23c3a /net/mac80211/main.c | |
| parent | 3cfd43f484c8d4bcb38db83f7be19fbd4ac8440c (diff) | |
| download | linux-90b726097ba0dcc1f9725182513e669a30e77db5.tar.xz | |
mac80211: Add netif state checking to ieee80211_ifa_changed
There's a window for ieee80211_ifa_changed() to get called whilst the
managed mode mutex has not been initialized when opening and stopping the
interface. Currently this causes a kernel BUG like the following:
[ 132.460013] kernel BUG at /home/wifi/iwlwifi-2.6/net/mac80211/main.c:380!
[ 132.460013] invalid opcode: 0000 [#1] SMP
The mutex is initialized during open(), hence once netif_running() is true,
the mutex should be valid. Fix by adding a netif_running() check to the
function.
Reported-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Tested-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/main.c')
| -rw-r--r-- | 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 5706156..88b671a 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -359,6 +359,9 @@ static int ieee80211_ifa_changed(struct notifier_block *nb, struct ieee80211_sub_if_data *sdata; struct ieee80211_if_managed *ifmgd; + if (!netif_running(ndev)) + return NOTIFY_DONE; + /* Make sure it's our interface that got changed */ if (!wdev) return NOTIFY_DONE; |