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Index: sys/vm/vm_map.c
===================================================================
--- sys/vm/vm_map.c
+++ sys/vm/vm_map.c
@@ -3640,7 +3640,8 @@
return (KERN_NO_SPACE);
}
- is_procstack = (addr >= (vm_offset_t)vm->vm_maxsaddr) ? 1 : 0;
+ is_procstack = ((addr >= (vm_offset_t)vm->vm_maxsaddr) &&
+ (addr < (vm_offset_t)p->p_sysent->sv_usrstack)) ? 1 : 0;
/*
* If this is the main process stack, see if we're over the stack

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