[Bug 1876554] [NEW] server 18.04 amd64 upgrading from kernel 4.15.0-96 to 4.15.0-99 breaks proftpd

[Hans Otto Lunde]

Public bug reported:

After upgrading the kernel from 4.15.0-96 to 4.15.0-99 it is no longer possible to do a ftp-login using proftpd. A "normal" ftp-login not sftp
In my setup proftpd is started via xinetd.
The login attempts fail with the following in syslog

May  1 09:53:23 ns3 proftpd[30032]: kloppenborglun.de - ProFTPD terminating (signal 11)
May  1 09:53:23 ns3 proftpd[30032]: kloppenborglun.de - FTP session closed.

No entries in proftpd's logs. I guess it crashes..

Reverting to kernel 4.15.0-96 - and everything works again

The following proftpd-packages are installed

ii  proftpd-basic  1.3.5e-1build1 amd64 Versatile, virtual-hosting FTP daemon - binaries
ii  proftpd-doc    1.3.5e-1build1 all   Versatile, virtual-hosting FTP daemon - documentation

** Affects: proftpd-dfsg (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1876554

Title:
  server 18.04 amd64 upgrading from kernel 4.15.0-96 to 4.15.0-99 breaks
  proftpd

Status in proftpd-dfsg package in Ubuntu:
  New

Bug description:
  After upgrading the kernel from 4.15.0-96 to 4.15.0-99 it is no longer possible to do a ftp-login using proftpd. A "normal" ftp-login not sftp
  In my setup proftpd is started via xinetd.
  The login attempts fail with the following in syslog

  May  1 09:53:23 ns3 proftpd[30032]: kloppenborglun.de - ProFTPD terminating (signal 11)
  May  1 09:53:23 ns3 proftpd[30032]: kloppenborglun.de - FTP session closed.

  No entries in proftpd's logs. I guess it crashes..

  Reverting to kernel 4.15.0-96 - and everything works again

  The following proftpd-packages are installed

  ii  proftpd-basic  1.3.5e-1build1 amd64 Versatile, virtual-hosting FTP daemon - binaries
  ii  proftpd-doc    1.3.5e-1build1 all   Versatile, virtual-hosting FTP daemon - documentation

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