From: Johannes Berg <johannes.berg@xxxxxxxxx>
If TX rates are specified during mesh join, the channel must
also be specified. Check the channel pointer to avoid a null
pointer dereference if it isn't.
Reported-by: Jouni Malinen <j@xxxxx>
Fixes: 8564e38206de ("cfg80211: add checks for beacon rate, extend to mesh")
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
net/wireless/nl80211.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 8ce85420ecb0..dfc8e6fff677 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -9987,6 +9987,9 @@ static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
if (err)
return err;
+ if (!setup.chandef.chan)
+ return -EINVAL;
+
err = validate_beacon_tx_rate(rdev, setup.chandef.chan->band,
&setup.beacon_rate);
if (err)
--
2.14.1
