linux-kernel - [PATCH 4.4 075/131] =?UTF-8?q?mac80211:=20fix=20"warning:=20=E2=80=98target=5Fmetric?= =?UTF-8?q?=E2=80=99=20may=20be=20used=20uninitialized"?=

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Message-Id: <20190401170058.365659273@linuxfoundation.org>
Date:   Mon,  1 Apr 2019 19:02:25 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jeff Mahoney <jeffm@...e.com>,
        Johannes Berg <johannes.berg@...el.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.4 075/131] =?UTF-8?q?mac80211:=20fix=20"warning:=20=E2=80=98target=5Fmetric?= =?UTF-8?q?=E2=80=99=20may=20be=20used=20uninitialized"?=

4.4-stable review patch.  If anyone has any objections, please let me know.

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

[ Upstream commit b4201cc4fc6e1c57d6d306b1f787865043d60129 ]

This fixes:

net/mac80211/mesh_hwmp.c:603:26: warning: ‘target_metric’ may be used uninitialized in this function

target_metric is only consumed when reply = true so no bug exists here,
but not all versions of gcc realize it.  Initialize to 0 to remove the
warning.

Signed-off-by: Jeff Mahoney <jeffm@...e.com>
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/mac80211/mesh_hwmp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 33d5271a9e32..466922f09d04 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -530,7 +530,7 @@ static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata,
 	const u8 *target_addr, *orig_addr;
 	const u8 *da;
 	u8 target_flags, ttl, flags;
-	u32 orig_sn, target_sn, lifetime, target_metric;
+	u32 orig_sn, target_sn, lifetime, target_metric = 0;
 	bool reply = false;
 	bool forward = true;
 	bool root_is_gate;
-- 
2.19.1