setupapi: Avoid storing uninitialized data in the registry.

dlls/setupapi/devinst.c

@@ -5023,7 +5023,7 @@ BOOL WINAPI SetupDiInstallDevice(HDEVINFO devinfo, SP_DEVINFO_DATA *device_data)
     static const WCHAR dotservicesW[] = {'.','S','e','r','v','i','c','e','s',0};
     static const WCHAR addserviceW[] = {'A','d','d','S','e','r','v','i','c','e',0};
     static const WCHAR rootW[] = {'r','o','o','t','\\',0};
-    WCHAR section[LINE_LEN], section_ext[LINE_LEN], subsection[LINE_LEN], inf_path[MAX_PATH], *extptr, *filepart;
+    WCHAR section_ext[LINE_LEN], subsection[LINE_LEN], inf_path[MAX_PATH], *extptr, *filepart;
     UINT install_flags = SPINST_ALL;
     HKEY driver_key, device_key;
     SC_HANDLE manager, service;
@@ -5112,7 +5112,7 @@ BOOL WINAPI SetupDiInstallDevice(HDEVINFO devinfo, SP_DEVINFO_DATA *device_data)
     TRACE("Copied INF file %s to %s.\n", debugstr_w(driver->inf_path), debugstr_w(inf_path));
 
     RegSetValueExW(driver_key, infpathW, 0, REG_SZ, (BYTE *)filepart, lstrlenW(filepart) * sizeof(WCHAR));
-    RegSetValueExW(driver_key, infsectionW, 0, REG_SZ, (BYTE *)section, lstrlenW(section) * sizeof(WCHAR));
+    RegSetValueExW(driver_key, infsectionW, 0, REG_SZ, (BYTE *)driver->section, lstrlenW(driver->section) * sizeof(WCHAR));
     if (extptr)
         RegSetValueExW(driver_key, infsectionextW, 0, REG_SZ, (BYTE *)extptr, lstrlenW(extptr) * sizeof(WCHAR));