Error: 500 OOPS: priv_sock_get_cmd [SOLVED]

Troubleshooting

seccomp filter sanboxing with vsftpd 3.0.x

The following error may occur on ftp clients with vsftpd 3.0.x:

500 OOPS: priv_sock_get_cmd

This is caused by seccomp filter sanboxing, which is enabled by default on amd64. To workaround this issue, disable seccomp filter sanboxing:

echo 'seccomp_sandbox=NO' >> vsftpd.conf
service vsftpd restart

For further information, refer to Red Hat bug #845980.