linux-kernel - [PATCH] rtnetlink: Fix an error handling path in rtnl

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Message-ID: <881a292603df853c52c6197ea23cc44ed9141b86.1729952851.git.christophe.jaillet@wanadoo.fr>
Date: Sat, 26 Oct 2024 16:28:08 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: Johannes Berg <johannes@...solutions.net>,
	Miri Korenblit <miriam.rachel.korenblit@...el.com>
Cc: linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	Johannes Berg <johannes.berg@...el.com>,
	linux-wireless@...r.kernel.org
Subject: [PATCH] rtnetlink: Fix an error handling path in rtnl_newlink()

All error handling paths go to "out", except this one. Before the commit in
Fixes, error in the previous code would also end to "out".

So, go to "out" also in this case to free some resources before returning.

Fixes: 62262dd00c31 ("wifi: cfg80211: disallow SMPS in AP mode")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
Compile tested only
---
 net/wireless/nl80211.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 1ac8a196f376..d9cc33474b85 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -6273,8 +6273,10 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
 	}
 
 	if (info->attrs[NL80211_ATTR_SMPS_MODE] &&
-	    nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]) != NL80211_SMPS_OFF)
-		return -EOPNOTSUPP;
+	    nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]) != NL80211_SMPS_OFF) {
+		err = -EOPNOTSUPP;
+		goto out;
+	}
 
 	params->pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
 	if (params->pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ]) {
-- 
2.47.0