Make sure the protection flags on the memory view of the PE header
match the actual mmap protection.

dlls/ntdll/virtual.c

diff --git a/dlls/ntdll/virtual.c b/dlls/ntdll/virtual.c
index ebaca5e..563e6d2 100644
--- a/dlls/ntdll/virtual.c
+++ b/dlls/ntdll/virtual.c
@@ -738,6 +738,7 @@
 
     /* set the image protections */
 
+    VIRTUAL_SetProt( view, ptr, header_size, VPROT_COMMITTED | VPROT_READ );
     sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
     for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
     {