Commit 601555cd authored by Johannes Berg's avatar Johannes Berg

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: default avatarJohannes Berg <>
parent 98f03342
......@@ -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)
if (WARN_ON(!cfg80211_chandef_valid(chandef)))
return -EINVAL;
if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
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