diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 52083d397fc4..b7f940e8b7ff 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -492,9 +492,10 @@ static char **realloc_argv(unsigned *size, char **old_argv)
 		gfp = GFP_NOIO;
 	}
 	argv = kmalloc_array(new_size, sizeof(*argv), gfp);
-	if (argv && old_argv) {
-		memcpy(argv, old_argv, *size * sizeof(*argv));
+	if (argv) {
 		*size = new_size;
+		if (old_argv)
+			memcpy(argv, old_argv, *size * sizeof(*argv));
 	}
 
 	kfree(old_argv);