struct vfsconf is tightly packed, but let's M_ZERO it in case that ever

changes to avoid exposing userland memory.

diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c
index a8a5305..8cdeb56 100644 (file)
--- a/sys/kern/vfs_subr.c
+++ b/sys/kern/vfs_subr.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: vfs_subr.c,v 1.257 2017/01/15 23:18:05 bluhm Exp $    */
+/*     $OpenBSD: vfs_subr.c,v 1.258 2017/04/04 18:17:02 deraadt Exp $  */
 /*     $NetBSD: vfs_subr.c,v 1.53 1996/04/22 01:39:13 christos Exp $   */
 
 /*
@@ -1311,7 +1311,7 @@ vfs_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp,
                        return (EOPNOTSUPP);
 
                /* Make a copy, clear out kernel pointers */
-               tmpvfsp = malloc(sizeof(*tmpvfsp), M_TEMP, M_WAITOK);
+               tmpvfsp = malloc(sizeof(*tmpvfsp), M_TEMP, M_WAITOK|M_ZERO);
                memcpy(tmpvfsp, vfsp, sizeof(*tmpvfsp));
                tmpvfsp->vfc_vfsops = NULL;
                tmpvfsp->vfc_next = NULL;