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> --- The bug is also about some other issue with X Rebirth but these patches should fix the main crash cause. 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 a29517e286d..985a8f5c89e 100644 --- a/dlls/ntdll/virtual.c +++ b/dlls/ntdll/virtual.c @@ -1204,7 +1204,7 @@ static NTSTATUS map_view( struct file_view **view_ret, void *base, size_t size, if (zero_bits_64) { - if (!(ptr = find_free_area( (void*)0, alloc.limit, size, mask, top_down, TRUE, unix_prot ))) + if (!(ptr = find_free_area( address_space_start, alloc.limit, size, mask, top_down, TRUE, unix_prot ))) return STATUS_NO_MEMORY; TRACE( "got mem with find_free_area %p-%p\n", ptr, (char *)ptr + size ); goto done; -- 2.24.1