Alexandre Julliard : ntdll: Fix rounding the length of the runtime info parameter.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 4dad4315d52d6125991bdd14d0a6c0ad71e7c24d
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=4dad4315d52d6125991bdd14d0a6c0ad71e7c24d

Author: Alexandre Julliard <julliard at winehq.org>
Date:   Thu Feb 25 22:38:44 2021 +0100

ntdll: Fix rounding the length of the runtime info parameter.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=50723
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/ntdll/unix/env.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/dlls/ntdll/unix/env.c b/dlls/ntdll/unix/env.c
index c7870c6bb4e..c6037afafbc 100644
--- a/dlls/ntdll/unix/env.c
+++ b/dlls/ntdll/unix/env.c
@@ -1622,8 +1622,14 @@ void init_startup_info(void)
     copy_unicode_string( &src, &dst, &params->WindowTitle, info->title_len );
     copy_unicode_string( &src, &dst, &params->Desktop, info->desktop_len );
     copy_unicode_string( &src, &dst, &params->ShellInfo, info->shellinfo_len );
-    copy_unicode_string( &src, &dst, &params->RuntimeInfo, info->runtime_len );
-    params->RuntimeInfo.MaximumLength = params->RuntimeInfo.Length;  /* runtime info isn't a real string */
+    /* runtime info isn't a real string */
+    params->RuntimeInfo.MaximumLength = params->RuntimeInfo.Length = info->runtime_len;
+    params->RuntimeInfo.Buffer = dst;
+    memcpy( dst, src, info->runtime_len );
+    src += (info->runtime_len + 1) / sizeof(WCHAR);
+    dst += (info->runtime_len + 1) / sizeof(WCHAR);
+    assert( (char *)src == (char *)info + info_size );
+
     params->Environment = dst;
     dst += copy_environment( dst, src );
     memcpy( dst, dyn_env, dyn_size );