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SubjectRe: [PATCH] tools/usbip: fixes potential (minor) "buffer overflow" (detected on recent gcc with -Werror)
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On 12/05/2017 08:09 AM, julien.boibessot@free.fr wrote:
> From: Julien BOIBESSOT <julien.boibessot@armadeus.com>
>
> Fixes following build error:
> vhci_driver.c: In function 'refresh_imported_device_list':
> vhci_driver.c:118:37: error: 'snprintf' output may be truncated before
> the last format character [-Werror=format-truncation=]
> snprintf(status, sizeof(status), "status.%d", i);
> ^~~~~~~~~~~
> vhci_driver.c:118:4: note: 'snprintf' output between 9 and 18 bytes into
> a destination of size 17
> snprintf(status, sizeof(status), "status.%d", i);
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> cc1: all warnings being treated as errors
>
> Signed-off-by: Julien BOIBESSOT <julien.boibessot@armadeus.com>
> ---
> tools/usb/usbip/libsrc/vhci_driver.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/usb/usbip/libsrc/vhci_driver.c b/tools/usb/usbip/libsrc/vhci_driver.c
> index 5727dfb..a9ce431 100644
> --- a/tools/usb/usbip/libsrc/vhci_driver.c
> +++ b/tools/usb/usbip/libsrc/vhci_driver.c
> @@ -106,7 +106,7 @@ static int parse_status(const char *value)
> return 0;
> }
>
> -#define MAX_STATUS_NAME 16
> +#define MAX_STATUS_NAME 18
>
> static int refresh_imported_device_list(void)
> {
>

I have been thinking about this some and if it indeed a large
ncontrollers value that makes the buffer overflow, we might have
a bigger problem. That said, this patch looks good to fix the
warming.

Greg,

Could you please pick this patch up.

Acked-by: Shuah Khan <shuahkh@osg.samsung.com>

thanks,
-- Shuah

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