diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 3562de50098e..3fce632032be 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -502,9 +502,9 @@ static char **realloc_argv(unsigned int *size, char **old_argv)
 	}
 	argv = kmalloc_array(new_size, sizeof(*argv), gfp);
 	if (argv) {
-		*size = new_size;
 		if (old_argv)
 			memcpy(argv, old_argv, *size * sizeof(*argv));
+		*size = new_size;
 	}
 
 	kfree(old_argv);