[src/netbsd-9]: src/sys/compat/ossaudio Pull up following revision(s) (reques...

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

details:   https://anonhg.NetBSD.org/src/rev/b9619f5331bd
branches:  netbsd-9
changeset: 1001666:b9619f5331bd
user:      martin <martin%NetBSD.org@localhost>
date:      Wed Apr 22 18:12:26 2020 +0000

description:
Pull up following revision(s) (requested by maxv in ticket #841):

        sys/compat/ossaudio/ossaudio.c: revision 1.83

ossaudio: Avoid giving userland uninitialized memory. Noticed by maxv.

The uninitalized field in this structure is `fillers`, an array that
simply reserves space for later changes in OSSv4, which this version
of the OSS compat layer (specifically for Linux applications) makes no
effort to implement.

diffstat:

 sys/compat/ossaudio/ossaudio.c |  5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diffs (26 lines):

diff -r 8b422b334cec -r b9619f5331bd sys/compat/ossaudio/ossaudio.c
--- a/sys/compat/ossaudio/ossaudio.c    Wed Apr 22 18:07:37 2020 +0000
+++ b/sys/compat/ossaudio/ossaudio.c    Wed Apr 22 18:12:26 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ossaudio.c,v 1.74.4.2 2019/11/19 11:01:27 martin Exp $ */
+/*     $NetBSD: ossaudio.c,v 1.74.4.3 2020/04/22 18:12:26 martin Exp $ */
 
 /*-
  * Copyright (c) 1997, 2008 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ossaudio.c,v 1.74.4.2 2019/11/19 11:01:27 martin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ossaudio.c,v 1.74.4.3 2020/04/22 18:12:26 martin Exp $");
 
 #include <sys/param.h>
 #include <sys/proc.h>
@@ -1084,6 +1084,7 @@
                            __func__, error));
                        goto out;
                }
+               memset(&omi, 0, sizeof omi);
                omi.modify_counter = 1;
                strncpy(omi.id, adev.name, sizeof omi.id);
                strncpy(omi.name, adev.name, sizeof omi.name);