* [1/2] usb: gadget: udc: Use scnprintf() instead of snprintf()
@ 2018-02-27 2:04 Jaejoong Kim
0 siblings, 0 replies; 2+ messages in thread
From: Jaejoong Kim @ 2018-02-27 2:04 UTC (permalink / raw)
To: Felipe Balbi, Alan Stern; +Cc: linux-usb, Jaejoong Kim
The show() method should use scnprintf() not snprintf() because snprintf()
may returns a value that exceeds its second argument.
Signed-off-by: Jaejoong Kim <climbbb.kim@gmail.com>
---
drivers/usb/gadget/udc/core.c | 4 ++--
drivers/usb/gadget/udc/dummy_hcd.c | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
index 93eff7de..306d72d 100644
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -1484,7 +1484,7 @@ ssize_t name##_show(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \
- return snprintf(buf, PAGE_SIZE, "%s\n", \
+ return scnprintf(buf, PAGE_SIZE, "%s\n", \
usb_speed_string(udc->gadget->param)); \
} \
static DEVICE_ATTR_RO(name)
@@ -1499,7 +1499,7 @@ ssize_t name##_show(struct device *dev, \
struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \
struct usb_gadget *gadget = udc->gadget; \
\
- return snprintf(buf, PAGE_SIZE, "%d\n", gadget->name); \
+ return scnprintf(buf, PAGE_SIZE, "%d\n", gadget->name); \
} \
static DEVICE_ATTR_RO(name)
diff --git a/drivers/usb/gadget/udc/dummy_hcd.c b/drivers/usb/gadget/udc/dummy_hcd.c
index d0128f9..a09ce9b 100644
--- a/drivers/usb/gadget/udc/dummy_hcd.c
+++ b/drivers/usb/gadget/udc/dummy_hcd.c
@@ -2380,7 +2380,7 @@ static inline ssize_t show_urb(char *buf, size_t size, struct urb *urb)
{
int ep = usb_pipeendpoint(urb->pipe);
- return snprintf(buf, size,
+ return scnprintf(buf, size,
"urb/%p %s ep%d%s%s len %d/%d\n",
urb,
({ char *s;
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [1/2] usb: gadget: udc: Use scnprintf() instead of snprintf()
@ 2018-02-27 2:14 Jaejoong Kim
0 siblings, 0 replies; 2+ messages in thread
From: Jaejoong Kim @ 2018-02-27 2:14 UTC (permalink / raw)
To: Felipe Balbi, Alan Stern; +Cc: USB list, Jaejoong Kim
This is one patch file not series. Sorry for the patch numbering mistake.
Thanks jaejoong
2018-02-27 11:04 GMT+09:00 Jaejoong Kim <climbbb.kim@gmail.com>:
> The show() method should use scnprintf() not snprintf() because snprintf()
> may returns a value that exceeds its second argument.
>
> Signed-off-by: Jaejoong Kim <climbbb.kim@gmail.com>
> ---
> drivers/usb/gadget/udc/core.c | 4 ++--
> drivers/usb/gadget/udc/dummy_hcd.c | 2 +-
> 2 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
> index 93eff7de..306d72d 100644
> --- a/drivers/usb/gadget/udc/core.c
> +++ b/drivers/usb/gadget/udc/core.c
> @@ -1484,7 +1484,7 @@ ssize_t name##_show(struct device *dev, \
> struct device_attribute *attr, char *buf) \
> { \
> struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \
> - return snprintf(buf, PAGE_SIZE, "%s\n", \
> + return scnprintf(buf, PAGE_SIZE, "%s\n", \
> usb_speed_string(udc->gadget->param)); \
> } \
> static DEVICE_ATTR_RO(name)
> @@ -1499,7 +1499,7 @@ ssize_t name##_show(struct device *dev, \
> struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \
> struct usb_gadget *gadget = udc->gadget; \
> \
> - return snprintf(buf, PAGE_SIZE, "%d\n", gadget->name); \
> + return scnprintf(buf, PAGE_SIZE, "%d\n", gadget->name); \
> } \
> static DEVICE_ATTR_RO(name)
>
> diff --git a/drivers/usb/gadget/udc/dummy_hcd.c b/drivers/usb/gadget/udc/dummy_hcd.c
> index d0128f9..a09ce9b 100644
> --- a/drivers/usb/gadget/udc/dummy_hcd.c
> +++ b/drivers/usb/gadget/udc/dummy_hcd.c
> @@ -2380,7 +2380,7 @@ static inline ssize_t show_urb(char *buf, size_t size, struct urb *urb)
> {
> int ep = usb_pipeendpoint(urb->pipe);
>
> - return snprintf(buf, size,
> + return scnprintf(buf, size,
> "urb/%p %s ep%d%s%s len %d/%d\n",
> urb,
> ({ char *s;
> --
> 2.7.4
>
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