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netbsd32_sacopyout: don't leak kernel stack garbage to userland.

This commit is contained in:
yamt 2006-06-25 08:11:06 +00:00
parent 8308eb1f7a
commit bf0859e932
1 changed files with 3 additions and 2 deletions
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5
sys/compat/netbsd32/netbsd32_sa.c
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@ -1,4 +1,4 @@
/* $NetBSD: netbsd32_sa.c,v 1.1 2006/03/29 23:04:12 cube Exp $ */ /* $NetBSD: netbsd32_sa.c,v 1.2 2006/06/25 08:11:06 yamt Exp $ */
/* /*
* Copyright (c) 2005 The NetBSD Foundation. * Copyright (c) 2005 The NetBSD Foundation.
@ -33,7 +33,7 @@
*/ */
#include <sys/cdefs.h> #include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: netbsd32_sa.c,v 1.1 2006/03/29 23:04:12 cube Exp $"); __KERNEL_RCSID(0, "$NetBSD: netbsd32_sa.c,v 1.2 2006/06/25 08:11:06 yamt Exp $");
#include <sys/types.h> #include <sys/types.h>
#include <sys/param.h> #include <sys/param.h>
@ -61,6 +61,7 @@ netbsd32_sacopyout(int type, const void *src, void *dst)
const ucontext_t *u = src; const ucontext_t *u = src;
ucontext32_t u32; ucontext32_t u32;
memset(&u32, 0, sizeof(u32));
u32.uc_flags = u->uc_flags; u32.uc_flags = u->uc_flags;
u32.uc_stack.ss_sp = (uintptr_t)u->uc_stack.ss_sp; u32.uc_stack.ss_sp = (uintptr_t)u->uc_stack.ss_sp;
u32.uc_stack.ss_size = u->uc_stack.ss_size; u32.uc_stack.ss_size = u->uc_stack.ss_size;