From: Christian Marangi <ansuelsmth@gmail.com>
To: Andrew Lunn <andrew@lunn.ch>,
Vivien Didelot <vivien.didelot@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Vladimir Oltean <olteanv@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Christian Marangi <ansuelsmth@gmail.com>,
"Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [net PATCH] net: dsa: qca8k: fix NULL pointer dereference for of_device_get_match_data
Date: Sun, 4 Sep 2022 23:53:19 +0200 [thread overview]
Message-ID: <20220904215319.13070-1-ansuelsmth@gmail.com> (raw)
of_device_get_match_data is called on priv->dev before priv->dev is
actually set. Move of_device_get_match_data after priv->dev is correctly
set to fix this kernel panic.
Fixes: 3bb0844e7bcd ("net: dsa: qca8k: cache match data to speed up access")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
drivers/net/dsa/qca/qca8k-8xxx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/dsa/qca/qca8k-8xxx.c b/drivers/net/dsa/qca/qca8k-8xxx.c
index 1d3e7782a71f..c181346388a4 100644
--- a/drivers/net/dsa/qca/qca8k-8xxx.c
+++ b/drivers/net/dsa/qca/qca8k-8xxx.c
@@ -1889,9 +1889,9 @@ qca8k_sw_probe(struct mdio_device *mdiodev)
if (!priv)
return -ENOMEM;
- priv->info = of_device_get_match_data(priv->dev);
priv->bus = mdiodev->bus;
priv->dev = &mdiodev->dev;
+ priv->info = of_device_get_match_data(priv->dev);
priv->reset_gpio = devm_gpiod_get_optional(priv->dev, "reset",
GPIOD_ASIS);
--
2.37.2
next reply other threads:[~2022-09-04 21:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-04 21:53 Christian Marangi [this message]
2022-09-05 16:50 ` [net PATCH] net: dsa: qca8k: fix NULL pointer dereference for of_device_get_match_data Vladimir Oltean
2022-09-05 16:59 ` Christian Marangi
2022-09-05 17:10 ` Vladimir Oltean
2022-09-06 9:40 ` patchwork-bot+netdevbpf
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