D34174.diff
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	diff --git a/sys/compat/linux/linux_mmap.c b/sys/compat/linux/linux_mmap.c
	--- a/sys/compat/linux/linux_mmap.c
	+++ b/sys/compat/linux/linux_mmap.c
	@@ -176,7 +176,7 @@
	* mmap's return value.
	*/
	PROC_LOCK(p);
	- vms->vm_maxsaddr = (char *)p->p_sysent->sv_usrstack -
	+ vms->vm_maxsaddr = (char *)round_page(vms->vm_stacktop) -
	lim_cur_proc(p, RLIMIT_STACK);
	PROC_UNLOCK(p);
	}
	diff --git a/sys/kern/kern_resource.c b/sys/kern/kern_resource.c
	--- a/sys/kern/kern_resource.c
	+++ b/sys/kern/kern_resource.c
	@@ -770,12 +770,12 @@
	if (limp->rlim_cur > oldssiz.rlim_cur) {
	prot = p->p_sysent->sv_stackprot;
	size = limp->rlim_cur - oldssiz.rlim_cur;
	- addr = p->p_sysent->sv_usrstack -
	+ addr = round_page(p->p_vmspace->vm_stacktop) -
	limp->rlim_cur;
	} else {
	prot = VM_PROT_NONE;
	size = oldssiz.rlim_cur - limp->rlim_cur;
	- addr = p->p_sysent->sv_usrstack -
	+ addr = round_page(p->p_vmspace->vm_stacktop) -
	oldssiz.rlim_cur;
	}
	addr = trunc_page(addr);
	diff --git a/sys/vm/vm_map.c b/sys/vm/vm_map.c
	--- a/sys/vm/vm_map.c
	+++ b/sys/vm/vm_map.c
	@@ -4664,7 +4664,7 @@
	* limit.
	*/
	is_procstack = addr >= (vm_offset_t)vm->vm_maxsaddr &&
	- addr < (vm_offset_t)p->p_sysent->sv_usrstack;
	+ addr < (vm_offset_t)vm->vm_stacktop;
	if (is_procstack && (ctob(vm->vm_ssize) + grow_amount > stacklim))
	return (KERN_NO_SPACE);