From: Hui Tang <tanghui20@huawei.com>
To: <davem@davemloft.net>, <edumazet@google.com>, <kuba@kernel.org>,
<mw@semihalf.com>, <linux@armlinux.org.uk>, <andrew@lunn.ch>,
<pabeni@redhat.com>
Cc: <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<yusongping@huawei.com>
Subject: [PATCH] net: mdio-ipq4019: fix possible invalid pointer dereference
Date: Tue, 15 Nov 2022 12:50:28 +0800 [thread overview]
Message-ID: <20221115045028.182441-1-tanghui20@huawei.com> (raw)
priv->eth_ldo_rdy is saved the return value of devm_ioremap_resource(),
which !IS_ERR() should be used to check.
Fixes: 23a890d493e3 ("net: mdio: Add the reset function for IPQ MDIO driver")
Signed-off-by: Hui Tang <tanghui20@huawei.com>
---
drivers/net/mdio/mdio-ipq4019.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/mdio/mdio-ipq4019.c b/drivers/net/mdio/mdio-ipq4019.c
index 4eba5a91075c..d7a1f7c56f97 100644
--- a/drivers/net/mdio/mdio-ipq4019.c
+++ b/drivers/net/mdio/mdio-ipq4019.c
@@ -188,7 +188,7 @@ static int ipq_mdio_reset(struct mii_bus *bus)
/* To indicate CMN_PLL that ethernet_ldo has been ready if platform resource 1
* is specified in the device tree.
*/
- if (priv->eth_ldo_rdy) {
+ if (!IS_ERR(priv->eth_ldo_rdy)) {
val = readl(priv->eth_ldo_rdy);
val |= BIT(0);
writel(val, priv->eth_ldo_rdy);
--
2.17.1
next reply other threads:[~2022-11-15 4:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-15 4:50 Hui Tang [this message]
2022-11-15 13:36 ` Andrew Lunn
2022-11-17 8:50 ` Hui Tang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20221115045028.182441-1-tanghui20@huawei.com \
--to=tanghui20@huawei.com \
--cc=andrew@lunn.ch \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=mw@semihalf.com \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=yusongping@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®