diff options
| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2019-07-31 13:15:43 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-08-25 11:48:00 +0300 |
| commit | f417f9715f4c745bdf94ad81c731cabc3a795692 (patch) | |
| tree | b51fbf1973a6ca07e966959917b94a4c72111ed6 /drivers/usb/gadget | |
| parent | 7f52d6d2a82df15d7ea01d69d0943d2abc201b43 (diff) | |
| download | linux-f417f9715f4c745bdf94ad81c731cabc3a795692.tar.xz | |
usb: gadget: udc: renesas_usb3: Fix sysfs interface of "role"
commit 5dac665cf403967bb79a7aeb8c182a621fe617ff 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: cc995c9ec118 ("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>
Diffstat (limited to 'drivers/usb/gadget')
| -rw-r--r-- | drivers/usb/gadget/udc/renesas_usb3.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c index fea02c7ad4f4..a5254e82d628 100644 --- a/drivers/usb/gadget/udc/renesas_usb3.c +++ b/drivers/usb/gadget/udc/renesas_usb3.c @@ -19,6 +19,7 @@ #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> @@ -2378,9 +2379,9 @@ 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; |