nl80211: validate number of probe response CSA counters

commit ad5987b47e96a0fb6d13fea250e936aed000093c upstream.

Due to an apparent copy/paste bug, the number of counters for the
beacon configuration were checked twice, instead of checking the
number of probe response counters. Fix this to check the number of
probe response counters before parsing those.

Fixes: 9a774c78e211 ("cfg80211: Support multiple CSA counters")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 7d72283901a3bb8fa7d3294e5dcdfbc6cd61e3a2..7d38dd6971a8f817b4d0ded54624bd1393a0f143 100644 (file)
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -6811,7 +6811,7 @@ static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
 
                params.n_counter_offsets_presp = len / sizeof(u16);
                if (rdev->wiphy.max_num_csa_counters &&
-                   (params.n_counter_offsets_beacon >
+                   (params.n_counter_offsets_presp >
                     rdev->wiphy.max_num_csa_counters))
                        return -EINVAL;