linux-kernel - [PATCH] cfg80211: Fix memory leak in cfg80211_inform_single_bss

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Message-Id: <20191027180447.8998-1-navid.emamdoost@gmail.com>
Date:   Sun, 27 Oct 2019 13:04:46 -0500
From:   Navid Emamdoost <navid.emamdoost@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     emamd001@....edu, kjlu@....edu, smccaman@....edu,
        Navid Emamdoost <navid.emamdoost@...il.com>,
        Johannes Berg <johannes@...solutions.net>,
        "David S. Miller" <davem@...emloft.net>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] cfg80211: Fix memory leak in cfg80211_inform_single_bss_data

In the implementation of cfg80211_inform_single_bss_data() the allocated
memory for ies is leaked in case of an error. Release ies if
cfg80211_bss_update() fails.

Fixes: 06aa7afaaa21 ("cfg80211: add cfg80211_inform_bss")
Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
---
 net/wireless/scan.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index aef240fdf8df..686eb227bcc3 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -1437,8 +1437,10 @@ cfg80211_inform_single_bss_data(struct wiphy *wiphy,
 	signal_valid = abs(data->chan->center_freq - channel->center_freq) <=
 		wiphy->max_adj_channel_rssi_comp;
 	res = cfg80211_bss_update(wiphy_to_rdev(wiphy), &tmp, signal_valid, ts);
-	if (!res)
+	if (!res) {
+		kfree(ies);
 		return NULL;
+	}
 
 	if (channel->band == NL80211_BAND_60GHZ) {
 		bss_type = res->pub.capability & WLAN_CAPABILITY_DMG_TYPE_MASK;
-- 
2.17.1