Hello, http://git.savannah.gnu.org/cgit/hurd/gnumach.git/tree/vm/vm_object.c#n1371 (http://git.savannah.gnu.org/cgit/hurd/gnumach.git/tree/vm/vm_object.c#n1371)
if the previous call vm_object_enter return VM_OBJECT_NULL in new_object the new_object->shadow dereference of NULL will cause a bug. attached file fix this. Fix the indentation if it is not correct.
0001-fix-possible-dereference-of-NULL.patch
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