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From: Johannes Berg <johannes@sipsolutions.net>
To: linux-wireless@vger.kernel.org
Cc: Johannes Berg <johannes.berg@intel.com>
Subject: [PATCH 2/5] nl80211: always check nla_put* return values
Date: Wed, 14 Sep 2016 10:11:55 +0200	[thread overview]
Message-ID: <1473840718-5605-2-git-send-email-johannes@sipsolutions.net> (raw)
In-Reply-To: <1473840718-5605-1-git-send-email-johannes@sipsolutions.net>

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

A few instances were found where we didn't check them, add the
missing checks even though they'll probably never trigger as
the message should be large enough here.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 net/wireless/nl80211.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 4c8cc743ae7d..ec024cb90faa 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -9444,8 +9444,10 @@ static int nl80211_send_wowlan_nd(struct sk_buff *msg,
 	if (!freqs)
 		return -ENOBUFS;
 
-	for (i = 0; i < req->n_channels; i++)
-		nla_put_u32(msg, i, req->channels[i]->center_freq);
+	for (i = 0; i < req->n_channels; i++) {
+		if (nla_put_u32(msg, i, req->channels[i]->center_freq))
+			return -ENOBUFS;
+	}
 
 	nla_nest_end(msg, freqs);
 
@@ -9459,9 +9461,10 @@ static int nl80211_send_wowlan_nd(struct sk_buff *msg,
 			if (!match)
 				return -ENOBUFS;
 
-			nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
-				req->match_sets[i].ssid.ssid_len,
-				req->match_sets[i].ssid.ssid);
+			if (nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
+				    req->match_sets[i].ssid.ssid_len,
+				    req->match_sets[i].ssid.ssid))
+				return -ENOBUFS;
 			nla_nest_end(msg, match);
 		}
 		nla_nest_end(msg, matches);
-- 
2.8.1

  reply	other threads:[~2016-09-14  8:12 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-14  8:11 [PATCH 1/5] nl80211: always check nla_nest_start() return value Johannes Berg
2016-09-14  8:11 ` Johannes Berg [this message]
2016-09-14  8:11 ` [PATCH 3/5] mac80211: remove unused assignment Johannes Berg
2016-09-14  8:11 ` [PATCH 4/5] mac80211: remove pointless chanctx NULL check Johannes Berg
2016-09-14  8:11 ` [PATCH 5/5] mac80211: remove sta_remove_debugfs driver callback Johannes Berg

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