lkml.org 
[lkml]   [2018]   [Apr]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.9 057/310] usb: dwc3: keystone: check return value
Date
4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

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) {

\
 
 \ /
  Last update: 2018-04-11 22:09    [W:0.845 / U:0.080 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site