From: Dan Carpenter <dan.carpenter@oracle.com>
To: Peter Chen <peter.chen@kernel.org>, Fabio Estevam <festevam@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
NXP Linux Team <linux-imx@nxp.com>,
Frieder Schrempf <frieder.schrempf@kontron.de>,
linux-usb@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [PATCH] usb: chipidea: ci_hdrc_imx: fix potential error pointer dereference in probe
Date: Wed, 17 Nov 2021 10:49:23 +0300 [thread overview]
Message-ID: <20211117074923.GF5237@kili> (raw)
If the first call to devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0)
fails with something other than -ENODEV then it leads to an error
pointer dereference. For those errors we should just jump directly to
the error handling.
Fixes: 8253a34bfae3 ("usb: chipidea: ci_hdrc_imx: Also search for 'phys' phandle")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
drivers/usb/chipidea/ci_hdrc_imx.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
index f1d100671ee6..097142ffb184 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -420,15 +420,15 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
data->phy = devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0);
if (IS_ERR(data->phy)) {
ret = PTR_ERR(data->phy);
- if (ret == -ENODEV) {
- data->phy = devm_usb_get_phy_by_phandle(dev, "phys", 0);
- if (IS_ERR(data->phy)) {
- ret = PTR_ERR(data->phy);
- if (ret == -ENODEV)
- data->phy = NULL;
- else
- goto err_clk;
- }
+ if (ret != -ENODEV)
+ goto err_clk;
+ data->phy = devm_usb_get_phy_by_phandle(dev, "phys", 0);
+ if (IS_ERR(data->phy)) {
+ ret = PTR_ERR(data->phy);
+ if (ret == -ENODEV)
+ data->phy = NULL;
+ else
+ goto err_clk;
}
}
--
2.20.1
next reply other threads:[~2021-11-17 7:50 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-17 7:49 Dan Carpenter [this message]
2021-11-20 6:16 ` [PATCH] usb: chipidea: ci_hdrc_imx: fix potential error pointer dereference in probe Peter Chen
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