[src/trunk]: src/sys/dev/usb Check if size is zero, too.

[maya <maya%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/aa3f97441bf2
branches:  trunk
changeset: 460427:aa3f97441bf2
user:      maya <maya%NetBSD.org@localhost>
date:      Wed Oct 23 01:03:36 2019 +0000

description:
Check if size is zero, too.

PR kern/53734

diffstat:

 sys/dev/usb/uvideo.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (27 lines):

diff -r 46efa1e12d46 -r aa3f97441bf2 sys/dev/usb/uvideo.c
--- a/sys/dev/usb/uvideo.c      Wed Oct 23 00:52:39 2019 +0000
+++ b/sys/dev/usb/uvideo.c      Wed Oct 23 01:03:36 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uvideo.c,v 1.50 2019/10/23 00:52:39 maya Exp $ */
+/*     $NetBSD: uvideo.c,v 1.51 2019/10/23 01:03:36 maya Exp $ */
 
 /*
  * Copyright (c) 2008 Patrick Mahoney
@@ -42,7 +42,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uvideo.c,v 1.50 2019/10/23 00:52:39 maya Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uvideo.c,v 1.51 2019/10/23 01:03:36 maya Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_usb.h"
@@ -999,7 +999,7 @@
 uvideo_unit_alloc_controls(struct uvideo_unit *vu, uint8_t size,
                           const uint8_t *controls)
 {
-       if (vu->vu_controls == 0)
+       if ((vu->vu_controls == 0) || (size == 0))
                return USBD_INVAL;
 
        vu->vu_controls = kmem_alloc(sizeof(*vu->vu_controls) * size, KM_SLEEP);