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| author | Simon Wunderlich <simon.wunderlich@s2003.tu-chemnitz.de> | 2013-01-23 15:15:57 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2013-01-24 16:05:30 +0100 |
| commit | 683d41ae6755e6ae297ec09603c229795ab9566e (patch) | |
| tree | 528f940800257f790c98cac635af0f622e0c1a1c /net/wireless/util.c | |
| parent | f68d776a04bfcebc426f605c4440ffe38c583a4b (diff) | |
| download | lwn-683d41ae6755e6ae297ec09603c229795ab9566e.tar.gz lwn-683d41ae6755e6ae297ec09603c229795ab9566e.zip | |
cfg80211: fix channel check in cfg80211_can_use_iftype_chan
In commit "cfg80211: check radar interface combinations" a regression
was introduced which might lead to NULL dereference if the argument
chan = NULL, which might happen in IBSS/wext case (and probably
others).
Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/util.c')
| -rw-r--r-- | net/wireless/util.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/wireless/util.c b/net/wireless/util.c index 1c2795d52db0..d7873c7ae0ec 100644 --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -1212,7 +1212,8 @@ int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, case NL80211_IFTYPE_MESH_POINT: case NL80211_IFTYPE_P2P_GO: case NL80211_IFTYPE_WDS: - radar_required = !!(chan->flags & IEEE80211_CHAN_RADAR); + radar_required = !!(chan && + (chan->flags & IEEE80211_CHAN_RADAR)); break; case NL80211_IFTYPE_P2P_CLIENT: case NL80211_IFTYPE_STATION: |