Patch "usb: dwc3: keystone: check return value" has been added to the 4.9-stable tree

Patch "usb: dwc3: keystone: check return value" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    usb: dwc3: keystone: check return value

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     usb-dwc3-keystone-check-return-value.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Mon Apr  9 17:09:24 CEST 2018
From: Pan Bian <bianpan2016@163.com>
Date: Sun, 23 Apr 2017 13:55:13 +0800
Subject: usb: dwc3: keystone: check return value

From: Pan Bian <bianpan2016@163.com>


[ Upstream commit 018047a1dba7636e1f7fdae2cc290a528991d648 ]

Function devm_clk_get() returns an ERR_PTR when it fails. However, in
function kdwc3_probe(), its return value is not checked, which may
result in a bad memory access bug. This patch fixes the bug.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/dwc3/dwc3-keystone.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/usb/dwc3/dwc3-keystone.c
+++ b/drivers/usb/dwc3/dwc3-keystone.c
@@ -107,6 +107,10 @@ static int kdwc3_probe(struct platform_d
 		return PTR_ERR(kdwc->usbss);
 
 	kdwc->clk = devm_clk_get(kdwc->dev, "usb");
+	if (IS_ERR(kdwc->clk)) {
+		dev_err(kdwc->dev, "unable to get usb clock\n");
+		return PTR_ERR(kdwc->clk);
+	}
 
 	error = clk_prepare_enable(kdwc->clk);
 	if (error < 0) {


Patches currently in stable-queue which might be from bianpan2016@163.com are

queue-4.9/cx25840-fix-unchecked-return-values.patch
queue-4.9/usb-dwc3-keystone-check-return-value.patch
queue-4.9/rtc-snvs-fix-an-incorrect-check-of-return-value.patch