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statvfs(2) returns bogus result from union mounted file systems with

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`-r' option, since it uses uninitialized buffer in the case of no
lower-layer file system.

So, add M_ZERO to malloc(9) flags to initialize the buffer.
This commit is contained in:
nakayama 2005-08-24 15:21:28 +00:00
parent b465609030
commit d8c6d7b24e
1 changed files with 3 additions and 3 deletions
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6
sys/fs/union/union_vfsops.c
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@ -1,4 +1,4 @@
/* $NetBSD: union_vfsops.c,v 1.27 2005/05/29 21:00:29 christos Exp $ */
/* $NetBSD: union_vfsops.c,v 1.28 2005/08/24 15:21:28 nakayama Exp $ */
/*
* Copyright (c) 1994 The Regents of the University of California.
@ -77,7 +77,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: union_vfsops.c,v 1.27 2005/05/29 21:00:29 christos Exp $");
__KERNEL_RCSID(0, "$NetBSD: union_vfsops.c,v 1.28 2005/08/24 15:21:28 nakayama Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -483,7 +483,7 @@ union_statvfs(mp, sbp, p)
{
int error;
struct union_mount *um = MOUNTTOUNIONMOUNT(mp);
struct statvfs *sbuf = malloc(sizeof(*sbuf), M_TEMP, M_WAITOK);
struct statvfs *sbuf = malloc(sizeof(*sbuf), M_TEMP, M_WAITOK | M_ZERO);
unsigned long lbsize;
#ifdef UNION_DIAGNOSTIC