[src/trunk]: src/sys/compat/netbsd32 Validate usec ranges in compat_50_netbsd...

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

details:   https://anonhg.NetBSD.org/src/rev/264a8c70009c
branches:  trunk
changeset: 965524:264a8c70009c
user:      kamil <kamil%NetBSD.org@localhost>
date:      Fri Sep 20 15:09:07 2019 +0000

description:
Validate usec ranges in compat_50_netbsd32_select()

Later in the code selcommon() checks for proper timespec, check only
correct usec of timeval before type conversions.

diffstat:

 sys/compat/netbsd32/netbsd32_compat_50.c |  8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diffs (29 lines):

diff -r c8f9298db2f4 -r 264a8c70009c sys/compat/netbsd32/netbsd32_compat_50.c
--- a/sys/compat/netbsd32/netbsd32_compat_50.c  Fri Sep 20 15:05:22 2019 +0000
+++ b/sys/compat/netbsd32/netbsd32_compat_50.c  Fri Sep 20 15:09:07 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: netbsd32_compat_50.c,v 1.39 2019/06/27 02:36:27 christos Exp $ */
+/*     $NetBSD: netbsd32_compat_50.c,v 1.40 2019/09/20 15:09:07 kamil Exp $    */
 
 /*-
  * Copyright (c) 2008 The NetBSD Foundation, Inc.
@@ -36,7 +36,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: netbsd32_compat_50.c,v 1.39 2019/06/27 02:36:27 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: netbsd32_compat_50.c,v 1.40 2019/09/20 15:09:07 kamil Exp $");
 
 #if defined(_KERNEL_OPT)
 #include "opt_compat_netbsd.h"
@@ -140,6 +140,10 @@
                error = copyin(SCARG_P32(uap, tv), &tv32, sizeof(tv32));
                if (error != 0)
                        return error;
+
+               if (tv32.tv_usec < 0 || tv32.tv_usec >= 1000000)
+                       return EINVAL;
+
                ats.tv_sec = tv32.tv_sec;
                ats.tv_nsec = tv32.tv_usec * 1000;
                ts = &ats;