Hi all, I was able to reproduce the old problems shown below with netkit-telnet_0.17.bb. https://patchwork.openembedded.org/patch/96727/ https://bugs.launchpad.net/ubuntu/+source/netkit-telnet/+bug/507455 The evaluated environment is, glibc :2.2 kernel :4.4.32 How to reproduce: Run the script more than once in the background, and please adjust CPU usage to 100%. #!/bin/sh HOST="host.target" USER="root" PASS="password" while : do expect -c " set timeout 10 spawn telnet $HOST expect login:\ ; send \"$USER\r\" expect sword:\ ; send \"$PASS\r\" expect \"# \" ; send \"exit\r\" " > /dev/null done Best regards, Seiichi Ishitsuka