From fb745c4bb4e9e788c96510f6be57d2d973e9a3fb Mon Sep 17 00:00:00 2001
From: Jes Sorensen <Jes.Sorensen@redhat.com>
Date: Tue, 1 Nov 2011 16:09:19 +0100
Subject: [PATCH] Incremental(): Check return value of dev_open() before trying
 to use it

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
---
 Incremental.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Incremental.c b/Incremental.c
index 35967391..bc5e9d09 100644
--- a/Incremental.c
+++ b/Incremental.c
@@ -386,6 +386,12 @@ int Incremental(char *devname, int verbose, int runstop,
 			sprintf(dn, "%d:%d", sra->devs->disk.major,
 				sra->devs->disk.minor);
 			dfd2 = dev_open(dn, O_RDONLY);
+			if (dfd2 < 0) {
+				fprintf(stderr, Name
+					": unable to open %s\n", devname);
+				rv = 2;
+				goto out_unlock;
+			}
 			st2 = dup_super(st);
 			if (st2->ss->load_super(st2, dfd2, NULL) ||
 			    st->ss->compare_super(st, st2) != 0) {
-- 
2.39.5