[Bug 46480] New: Invalid write of size 2 in ntoskrnl.exe/tests/ntoskrnl.c

https://bugs.winehq.org/show_bug.cgi?id=46480

Bug ID: 46480
           Summary: Invalid write of size 2 in
                    ntoskrnl.exe/tests/ntoskrnl.c
           Product: Wine
           Version: 4.0-rc6
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ntoskrnl
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

This was introduced in db8f599863b2158fe854b3d937db8257c660bab5. Note that it
was not present in the original patch by Gijs, but was introduced by the
changes made by Alexandre.

The problem is that one extra WCHAR is copied, but I'm not sure why Alexandre
decided to use offsetof, so I'm not sure how to fix it either.

==20740== Invalid write of size 2
==20740==    at 0x4034F03: memcpy (in
/usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==20740==    by 0x4CD885D: func_ntoskrnl (ntoskrnl.c:163)
==20740==    by 0x4CD9005: run_test (test.h:617)
==20740==    by 0x4CD7CED: main (test.h:701)
==20740==  Address 0x4980818 is 0 bytes after a block of size 80 alloc'd
==20740==    at 0x7BC507B3: RtlAllocateHeap (heap.c:260)
==20740==    by 0x4CD8801: func_ntoskrnl (heap.h:29)
==20740==    by 0x4CD9005: run_test (test.h:617)
==20740==    by 0x4CD7CED: main (test.h:701)