--- dropbear.orig	2017-02-07 10:54:05.024202311 +0100
+++ dropbear	2017-02-07 11:22:44.196816251 +0100
@@ -20,5 +20,9 @@
 log_begin_msg "Stopping dropbear"
 
 pid=$(cat /run/dropbear.pid)
-ps -eo ppid,pid | sed -nr "s/^\s*$pid\s+([0-9]+)\s*$/\1/p" | xargs -r kill
+ps -l | awk "{if (\$4 == $pid) print \$3}" | while read child_pid; do
+	kill $child_pid 2>/dev/null;
+done
 kill $pid