Rémi Bernon : ntdll: Start find_free_area from address_space_start instead of 0.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 5eca6ffa8b392ac852324a5be3cc88d8e60197a8
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=5eca6ffa8b392ac852324a5be...

Author: Rémi Bernon <rbernon(a)codeweavers.com>
Date:   Thu Dec 26 22:27:28 2019 +0100

ntdll: Start find_free_area from address_space_start instead of 0.

The search was initiated with base == 0, which returns NULL immediately
if MEM_TOP_DOWN is not used. Use address_space_start instead.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=47974
Signed-off-by: Rémi Bernon <rbernon(a)codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard(a)winehq.org>

---

 dlls/ntdll/virtual.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/ntdll/virtual.c b/dlls/ntdll/virtual.c
index 953cf58901..5890344f7a 100644
--- a/dlls/ntdll/virtual.c
+++ b/dlls/ntdll/virtual.c
@@ -1267,7 +1267,7 @@ static NTSTATUS map_view( struct file_view **view_ret, void *base, size_t size,
 
         if (zero_bits_64)
         {
-            if (!(ptr = map_free_area( (void*)0, alloc.limit, size, mask, top_down, VIRTUAL_GetUnixProt(vprot) )))
+            if (!(ptr = map_free_area( address_space_start, alloc.limit, size, mask, top_down, VIRTUAL_GetUnixProt(vprot) )))
                 return STATUS_NO_MEMORY;
             TRACE( "got mem with map_free_area %p-%p\n", ptr, (char *)ptr + size );
             goto done;