nl80211: fix null-ptr dereference on invalid mesh configuration
authorJohannes Berg <johannes.berg@intel.com>
Mon, 18 Sep 2017 20:46:36 +0000 (22:46 +0200)
committerJohannes Berg <johannes.berg@intel.com>
Mon, 18 Sep 2017 20:51:07 +0000 (22:51 +0200)
commit265698d7e6132a2d41471135534f4f36ad15b09c
treedcf575e252d1108b92cd98ebb0b7e77b304819c9
parente785fa0a164aa11001cba931367c7f94ffaff888
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>
net/wireless/nl80211.c