From 8a0af1bec882de66677e1a0cdceff841c39f92b0 Mon Sep 17 00:00:00 2001
From: Marian Csontos <mcsontos@redhat.com>
Date: Thu, 21 Jun 2018 10:20:09 +0200
Subject: [PATCH] libdm: fix buffer overflow

---
 libdm/libdm-common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libdm/libdm-common.c b/libdm/libdm-common.c
index 094e61854..40b366b98 100644
--- a/libdm/libdm-common.c
+++ b/libdm/libdm-common.c
@@ -1763,7 +1763,7 @@ static int _mountinfo_parse_line(const char *line, unsigned *maj, unsigned *min,
 			return 0;
 		}
 		devmapper += 12; /* skip fixed prefix */
-		for (i = 0; devmapper[i] && devmapper[i] != ' ' && i < sizeof(root); ++i)
+		for (i = 0; devmapper[i] && devmapper[i] != ' ' && i < sizeof(root)-1; ++i)
 			root[i] = devmapper[i];
 		root[i] = 0;
 		_unmangle_mountinfo_string(root, buf);