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| author | Johannes Berg <johannes.berg@intel.com> | 2014-11-27 17:26:56 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2014-11-27 17:27:52 +0100 |
| commit | 601555cd75ddfc2b95ebbb5eb1224c6a995e8203 (patch) | |
| tree | b5074513c5a1c1aa5ab4f07aab6332a1407b1db1 /net/wireless | |
| parent | 98f0334263f177dd22ca7c685cde04b47cc57b05 (diff) | |
| download | blackbird-op-linux-601555cd75ddfc2b95ebbb5eb1224c6a995e8203.tar.gz blackbird-op-linux-601555cd75ddfc2b95ebbb5eb1224c6a995e8203.zip | |
nl80211: don't crash sending invalid chandef
One of the cases for an invalid channel definition is that
the channel pointer is NULL, in which case the warning is
a bit late since we'll dereference the pointer. Bail out
of the function upon warning about this.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless')
| -rw-r--r-- | net/wireless/nl80211.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index e11980e74a04..4fae26d722f8 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -2317,7 +2317,8 @@ static inline u64 wdev_id(struct wireless_dev *wdev) static int nl80211_send_chandef(struct sk_buff *msg, const struct cfg80211_chan_def *chandef) { - WARN_ON(!cfg80211_chandef_valid(chandef)); + if (WARN_ON(!cfg80211_chandef_valid(chandef))) + return -EINVAL; if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chandef->chan->center_freq)) |
