linux-kernel - [PATCH] net: dsa: vsc73xxx: Fix uninitalized 'val' in vsc73xx_adjust

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Message-Id: <20230312155008.7830-1-listdansp@mail.ru>
Date:   Sun, 12 Mar 2023 15:50:08 +0000
From:   Danila Chernetsov <listdansp@...l.ru>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Danila Chernetsov <listdansp@...l.ru>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, lvc-project@...uxtesting.org
Subject: [PATCH] net: dsa: vsc73xxx: Fix uninitalized 'val' in vsc73xx_adjust_link

Using uninitialized variable after calls vsc73xx_read 
without error checking may cause incorrect driver behavior.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 95711cd5f0b4 ("net: dsa: vsc73xx: Split vsc73xx driver")
Signed-off-by: Danila Chernetsov <listdansp@...l.ru>
---
 drivers/net/dsa/vitesse-vsc73xx-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dsa/vitesse-vsc73xx-core.c b/drivers/net/dsa/vitesse-vsc73xx-core.c
index ae55167ce0a6..729005d6cb7e 100644
--- a/drivers/net/dsa/vitesse-vsc73xx-core.c
+++ b/drivers/net/dsa/vitesse-vsc73xx-core.c
@@ -758,7 +758,7 @@ static void vsc73xx_adjust_link(struct dsa_switch *ds, int port,
 				struct phy_device *phydev)
 {
 	struct vsc73xx *vsc = ds->priv;
-	u32 val;
+	u32 val = 0;
 
 	/* Special handling of the CPU-facing port */
 	if (port == CPU_PORT) {
-- 
2.25.1