Process case of corrupted firmware explicitly.

host/arch/x86/lib/crossystem_arch.c

 /* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <stdio.h>
 #include <string.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>
@@ skipping 374 matching lines @@
   /* Fall back to BINF.0 for legacy systems like Mario. */
   switch(ReadFileInt(ACPI_BINF_PATH ".0")) {
     case BINF0_NORMAL:
     case BINF0_DEVELOPER:
       return VBNV_RECOVERY_NOT_REQUESTED;
     case BINF0_RECOVERY_BUTTON:
       return VBNV_RECOVERY_RO_MANUAL;
     case BINF0_RECOVERY_DEV_SCREEN_KEY:
       return VBNV_RECOVERY_RW_DEV_SCREEN;
     case BINF0_RECOVERY_RW_FW_BAD:
+      return VBNV_RECOVERY_RO_INVALID_RW;
     case BINF0_RECOVERY_NO_OS:
       return VBNV_RECOVERY_RW_NO_OS;
     case BINF0_RECOVERY_BAD_OS:
       return VBNV_RECOVERY_RW_INVALID_OS;
     case BINF0_RECOVERY_OS_INITIATED:
       return VBNV_RECOVERY_LEGACY;
     default:
       /* Other values don't map cleanly to firmware type. */
       return -1;
   }
@@ skipping 213 matching lines @@
 
   return -1;
 }
 
 
 int VbSetArchPropertyString(const char* name, const char* value) {
   /* If there were settable architecture-dependent string properties,
    * they'd be here. */
   return -1;
 }