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[PATCH 06/10] exec: Stop relying on address space size

From: Sergey Bugaev
Subject: [PATCH 06/10] exec: Stop relying on address space size
Date: Sat, 23 Mar 2024 14:53:18 +0300

The code here just wants to deallocate the whole address space, and Mach
already contains the logic to limit the passed-in range to the vm_map's
actual bounds (see VM_MAP_RANGE_CHECK).
 exec/exec.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/exec/exec.c b/exec/exec.c
index f6788520..ac226f9a 100644
--- a/exec/exec.c
+++ b/exec/exec.c
@@ -1219,9 +1219,7 @@ do_exec (file_t file,
       munmap ((caddr_t) threads, nthreads * sizeof (thread_t));
       /* Deallocate the entire virtual address space of the task.  */
-      vm_deallocate (oldtask,
+      vm_deallocate (oldtask, 0, (vm_size_t) -1);
       /* Nothing is supposed to go wrong any more.  If anything does, the
         old task is now in a hopeless state and must be killed.  */

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