diff -Nru mountall-2.53/debian/changelog mountall-2.53ubuntu1/debian/changelog
--- mountall-2.53/debian/changelog	2014-02-20 00:17:22.000000000 +0000
+++ mountall-2.53ubuntu1/debian/changelog	2018-12-06 03:30:04.000000000 +0000
@@ -1,3 +1,10 @@
+mountall (2.53ubuntu1) trusty; urgency=medium
+
+  * try_udev_device: Ignore udev block device nodes which are missing
+    devnames (LP: #1807077).
+
+ -- Ryan Finnie <ryan.finnie@canonical.com>  Thu, 06 Dec 2018 03:29:27 +0000
+
 mountall (2.53) unstable; urgency=medium
 
   [ James Hunt ]
diff -Nru mountall-2.53/src/mountall.c mountall-2.53ubuntu1/src/mountall.c
--- mountall-2.53/src/mountall.c	2013-10-07 21:03:45.000000000 +0000
+++ mountall-2.53ubuntu1/src/mountall.c	2018-12-06 03:30:32.000000000 +0000
@@ -2853,6 +2853,9 @@
 	    || strcmp (subsystem, "block"))
 		return;
 
+	if (! devname)
+		return;
+
 	if (action
 	    && strcmp (action, "add")
 	    && strcmp (action, "change"))