Dmitry Timoshkov : ntdll: Don't try to map the PE file past the size of the backing file.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: a0772da5cf507b10800d5358554d682f82f48724
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=a0772da5cf507b10800d53585...

Author: Dmitry Timoshkov <dmitry(a)baikal.ru>
Date:   Wed May  6 15:15:56 2020 +0800

ntdll: Don't try to map the PE file past the size of the backing file.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=42125
Signed-off-by: Dmitry Timoshkov <dmitry(a)baikal.ru>
Signed-off-by: Alexandre Julliard <julliard(a)winehq.org>

---

 dlls/ntdll/virtual.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/dlls/ntdll/virtual.c b/dlls/ntdll/virtual.c
index 7700385eb7..399b0de41f 100644
--- a/dlls/ntdll/virtual.c
+++ b/dlls/ntdll/virtual.c
@@ -1588,6 +1588,7 @@ static NTSTATUS map_image( HANDLE hmapping, ACCESS_MASK access, int fd, int top_
         /* unaligned sections, this happens for native subsystem binaries */
         /* in that case Windows simply maps in the whole file */
 
+        total_size = min( total_size, ROUND_SIZE( 0, st.st_size ));
         if (map_file_into_view( view, fd, 0, total_size, 0, VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
                                 removable ) != STATUS_SUCCESS) goto error;