--- iproute2-4.15.0/lib/namespace.c.orig	2018-01-29 17:08:52.000000000 +0100
+++ iproute2-4.15.0/lib/namespace.c	2020-03-16 11:51:59.263397282 +0100
@@ -73,15 +73,6 @@
 			strerror(errno));
 		return -1;
 	}
-	/* Mount a version of /sys that describes the network namespace */
-	if (umount2("/sys", MNT_DETACH) < 0) {
-		fprintf(stderr, "umount of /sys failed: %s\n", strerror(errno));
-		return -1;
-	}
-	if (mount(name, "/sys", "sysfs", 0, NULL) < 0) {
-		fprintf(stderr, "mount of /sys failed: %s\n",strerror(errno));
-		return -1;
-	}
 
 	/* Setup bind mounts for config files in /etc */
 	bind_etc(name);