Module Name: src
Committed By: maxv
Date: Wed Sep 12 15:58:08 UTC 2018
Modified Files:
src/sys/uvm: uvm_map.c
Log Message:
Remove this check, it has never protected against mmap on page zero, and
has since been replaced by the code in exec_vm_minaddr.
To generate a diff of this commit:
cvs rdiff -u -r1.355 -r1.356 src/sys/uvm/uvm_map.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/uvm/uvm_map.c
diff -u src/sys/uvm/uvm_map.c:1.355 src/sys/uvm/uvm_map.c:1.356
--- src/sys/uvm/uvm_map.c:1.355 Mon Sep 3 16:29:37 2018
+++ src/sys/uvm/uvm_map.c Wed Sep 12 15:58:08 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: uvm_map.c,v 1.355 2018/09/03 16:29:37 riastradh Exp $ */
+/* $NetBSD: uvm_map.c,v 1.356 2018/09/12 15:58:08 maxv Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
@@ -66,7 +66,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uvm_map.c,v 1.355 2018/09/03 16:29:37 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uvm_map.c,v 1.356 2018/09/12 15:58:08 maxv Exp $");
#include "opt_ddb.h"
#include "opt_pax.h"
@@ -1064,15 +1064,6 @@ uvm_map(struct vm_map *map, vaddr_t *sta
KASSERT((size & PAGE_MASK) == 0);
-#ifndef __USER_VA0_IS_SAFE
- if ((flags & UVM_FLAG_FIXED) && *startp == 0 &&
- !VM_MAP_IS_KERNEL(map) && user_va0_disable) {
- uprintf("%s: process wants to map virtual address 0; see "
- "vm.user_va0_disable in sysctl(7).\n", __func__);
- return EACCES;
- }
-#endif
-
/*
* for pager_map, allocate the new entry first to avoid sleeping
* for memory while we have the map locked.
