linux-kernel - [PATCH 3.16 271/346] nl80211: validate number of probe response CSA counters

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Date:   Mon, 14 Nov 2016 00:14:20 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org,
        "Johannes Berg" <johannes.berg@...el.com>
Subject: [PATCH 3.16 271/346] nl80211: validate number of probe response
 CSA counters

3.16.39-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Johannes Berg <johannes.berg@...el.com>

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@...el.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 net/wireless/nl80211.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -5980,7 +5980,7 @@ static int nl80211_channel_switch(struct
 
 		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;