[src/trunk]: src/sys/dev/usb Stopgap XXX kludge for PR kern/42848 and PR kern...

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

details:   https://anonhg.NetBSD.org/src/rev/48354beb0844
branches:  trunk
changeset: 772736:48354beb0844
user:      jakllsch <jakllsch%NetBSD.org@localhost>
date:      Sat Jan 14 20:51:00 2012 +0000

description:
Stopgap XXX kludge for PR kern/42848 and PR kern/45013.

Someone should really find and fix the real problem,
but it's better to not crash in the meantime.

diffstat:

 sys/dev/usb/ucom.c |  8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diffs (29 lines):

diff -r 58b912d5d453 -r 48354beb0844 sys/dev/usb/ucom.c
--- a/sys/dev/usb/ucom.c        Sat Jan 14 20:41:49 2012 +0000
+++ b/sys/dev/usb/ucom.c        Sat Jan 14 20:51:00 2012 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ucom.c,v 1.95 2012/01/14 20:41:49 jakllsch Exp $       */
+/*     $NetBSD: ucom.c,v 1.96 2012/01/14 20:51:00 jakllsch Exp $       */
 
 /*
  * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc.
@@ -34,7 +34,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ucom.c,v 1.95 2012/01/14 20:41:49 jakllsch Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ucom.c,v 1.96 2012/01/14 20:51:00 jakllsch Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -370,6 +370,10 @@
        int s, i;
        int error;
 
+       /* XXX This is a hopefully temporary stopgap for kern/42848. */
+       if ((flag & (FREAD|FWRITE)) != (FREAD|FWRITE))
+               return (EINVAL);
+
        if (sc == NULL)
                return (ENXIO);