From 5a5a3c69630ea117f54c07e891007fe3374581ba Mon Sep 17 00:00:00 2001
From: Andrei Borzenkov <arvidjaar@gmail.com>
Date: Sat, 9 Jan 2016 21:25:22 +0300
Subject: [PATCH] setup: fix NULL pointer dereference

Check return value of grub_guess_root_devices

Found by: Coverity scan.
CID: 73638, 73751
---
 util/setup.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/util/setup.c b/util/setup.c
index d74567d0a..8aa5a39a7 100644
--- a/util/setup.c
+++ b/util/setup.c
@@ -312,6 +312,9 @@ SETUP (const char *dir,
     char **cur;
     int found = 0;
 
+    if (!root_devices)
+      grub_util_error (_("cannot find a device for %s (is /dev mounted?)"), dir);
+
     for (cur = root_devices; *cur; cur++)
       {
 	char *drive;