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>

diff --git a/Incremental.c b/Incremental.c
index 3596739192d67533fb9384584495170a2838b34e..bc5e9d096b65e27d3546f67fe8b885978dd21d86 100644 (file)
--- 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) {