[PATCH] kernelbase: Fix GetFileVersionInfo*() crashes with malformed resources.

[Arkadiusz Hiler]

Some Unity games ship with an encrypted Assembly-CSharp.dll, including
the resources directory, yet the engine still calls GetFileVersionInfoSizeW()
on those files. This may results in a page fault when trying to find the
version resource and takes the whole process down.

The change fixes crashes when launching Home Behind 2 and Crown Trick.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=50075
Signed-off-by: Arkadiusz Hiler 
---
 dlls/kernelbase/version.c | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/dlls/kernelbase/version.c b/dlls/kernelbase/version.c
index 58c49aa148b..a7b55de9706 100644
--- a/dlls/kernelbase/version.c
+++ b/dlls/kernelbase/version.c
@@ -42,6 +42,7 @@

#include "kernelbase.h"
 #include "wine/debug.h"
+#include "wine/exception.h"

WINE_DEFAULT_DEBUG_CHANNEL(ver);

@@ -547,15 +548,23 @@ static DWORD find_version_resource( HANDLE handle, DWORD *reslen, DWORD *offset,
     if (read_data( handle, mzh.e_lfanew, &magic, sizeof(magic) ) != sizeof(magic)) return 0;
     *offset = mzh.e_lfanew;

-    switch (magic)
+    __TRY
     {
-    case IMAGE_OS2_SIGNATURE:
-        if (!find_ne_resource( handle, reslen, offset )) magic = 0;
-        break;
-    case IMAGE_NT_SIGNATURE:
-        if (!find_pe_resource( handle, reslen, offset, flags )) magic = 0;
-        break;
+        switch (magic)
+        {
+        case IMAGE_OS2_SIGNATURE:
+            if (!find_ne_resource( handle, reslen, offset )) magic = 0;
+            break;
+        case IMAGE_NT_SIGNATURE:
+            if (!find_pe_resource( handle, reslen, offset, flags )) magic = 0;
+            break;
+        }
     }
+    __EXCEPT_PAGE_FAULT
+    {
+        magic = 0;
+    }
+    __ENDTRY
     WARN( "Can't handle %04x files.\n", magic );
     return magic;
 }