win32u: Fix device instance value size in link_device.

Signed-off-by: Jacek Caban <jacek@codeweavers.com> Signed-off-by: Huw Davies <huw@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

win32u: Fix device instance value size in link_device.
ef30380d · Jacek Caban · Alexandre Julliard · 66d2321a · ef30380d
Commit ef30380d authored Dec 07, 2021 by Jacek Caban Committed by Alexandre Julliard Dec 07, 2021
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sysparams.c dlls/win32u/sysparams.c +1 -1

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--- a/dlls/win32u/sysparams.c
+++ b/dlls/win32u/sysparams.c
@@ -798,7 +798,7 @@ static void link_device( const WCHAR *instance, const WCHAR *class )
    len += class_len;
    hkey = reg_create_key( control_key, buffer, len * sizeof(WCHAR), 0, NULL );

-    set_reg_value( hkey, device_instanceW, REG_SZ, instance, instance_len * sizeof(WCHAR) );
+    set_reg_value( hkey, device_instanceW, REG_SZ, instance, (instance_len + 1) * sizeof(WCHAR) );

    subkey = reg_create_key( hkey, hashW, sizeof(hashW), REG_OPTION_VOLATILE, NULL );
    NtClose( hkey );