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authorJohannes Berg <johannes.berg@intel.com>2017-09-18 22:46:36 +0200
committerJohannes Berg <johannes.berg@intel.com>2017-09-18 22:51:07 +0200
commit265698d7e6132a2d41471135534f4f36ad15b09c (patch)
treedcf575e252d1108b92cd98ebb0b7e77b304819c9 /net
parente785fa0a164aa11001cba931367c7f94ffaff888 (diff)
downloadlinux-265698d7e6132a2d41471135534f4f36ad15b09c.tar.bz2
nl80211: fix null-ptr dereference on invalid mesh configuration
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@w1.fi> Fixes: 8564e38206de ("cfg80211: add checks for beacon rate, extend to mesh") Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net')
-rw-r--r--net/wireless/nl80211.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index fbd5593e88cb..690874293cfc 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)