shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-04 18:19:28 +09:00
Code Issues Packages Projects Releases Wiki Activity

usb: gadget: udc: renesas_usb3: Fix sysfs interface of "role"

Browse Source 
commit 5dac665cf4 upstream.

Since the role_store() uses strncmp(), it's possible to refer
out-of-memory if the sysfs data size is smaller than strlen("host").
This patch fixes it by using sysfs_streq() instead of strncmp().

Fixes: cc995c9ec1 ("usb: gadget: udc: renesas_usb3: add support for usb role swap")
Cc: <stable@vger.kernel.org> # v4.12+
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yoshihiro Shimoda
2019-07-31 19:15:43 +09:00
committed by Greg Kroah-Hartman
parent 282a771475
commit 56a3eb5fa5
1 changed files with 3 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/usb/gadget/udc/renesas_usb3.c
View File

@@ -21,6 +21,7 @@
#include <linux/pm_runtime.h>
#include <linux/sizes.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/sys_soc.h>
#include <linux/uaccess.h>
#include <linux/usb/ch9.h>
@@ -2315,9 +2316,9 @@ static ssize_t role_store(struct device *dev, struct device_attribute *attr,
if (usb3->forced_b_device)
return -EBUSY;
if (!strncmp(buf, "host", strlen("host")))
if (sysfs_streq(buf, "host"))
new_mode_is_host = true;
else if (!strncmp(buf, "peripheral", strlen("peripheral")))
else if (sysfs_streq(buf, "peripheral"))
new_mode_is_host = false;
else
return -EINVAL;