From 5d11bd766ee17d3b9a7d96e184704723c11a99d1 Mon Sep 17 00:00:00 2001
From: Kinga Tanska <kinga.tanska@intel.com>
Date: Fri, 29 May 2020 08:31:36 +0200
Subject: [PATCH 24/27] Block overwriting existing links while manual assembly

Manual assembly with existing link caused overwriting
this link. Add checking link and block this situation.

Signed-off-by: Kinga Tanska <kinga.tanska@intel.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
---
 Assemble.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Assemble.c b/Assemble.c
index f302deb..914c193 100644
--- a/Assemble.c
+++ b/Assemble.c
@@ -1467,6 +1467,10 @@ try_again:
 				name = content->name;
 			break;
 		}
+		if (mddev && map_by_name(&map, mddev) != NULL) {
+			pr_err("Cannot create device with %s because is in use\n", mddev);
+			goto out;
+		}
 		if (!auto_assem)
 			/* If the array is listed in mdadm.conf or on
 			 * command line, then we trust the name
-- 
2.21.1 (Apple Git-122.3)