[Pkg-pdns-maintainers] Bug#829647: pdns-server: Using an RFC7505 null MX entry crashes pdns-server threads

[Florian Steinel]

Package: pdns-server
Version: 3.4.1-4+deb8u5
Severity: normal

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
     I was adding null MX entrys as defined in RFC7505 to the pdns-server running with the bind backend 
   * What exactly did you do (or not do) that was effective (or
     ineffective)?
     Added "@ IN MX 0 ." for a Host wich does not run a MTA.
   * What was the outcome of this action?
     The pdns-Server threads crashes, the dns changes and any further changes are not published.
     Logentries:
Jul 05 00:00:17 dns pdns_server[8928]: Jul 05 00:00:17 Signing thread died because of std::exception: All data was not consumed
Jul 05 00:00:17 dns pdns[8930]: Signing thread died because of std::exception: All data was not consumed
Jul 05 00:00:17 dns pdns[8930]: Signing thread died because of std::exception: All data was not consumed
Jul 05 00:00:17 dns pdns_server[8928]: Jul 05 00:00:17 Signing thread died because of std::exception: All data was not consumed
Jul 05 00:00:17 dns pdns[8930]: Signing thread died because of std::exception: failed in writen2: Broken pipe  
Jul 05 00:00:17 dns pdns[8930]: TCP Connection Thread died because of STL error: Reading from socket in Signing Pipe loop: Connection reset by peer
Jul 05 00:00:17 dns pdns_server[8928]: Jul 05 00:00:17 Signing thread died because of std::exception: failed in writen2: Broken pipe
Jul 05 00:00:17 dns pdns_server[8928]: Jul 05 00:00:17 TCP Connection Thread died because of STL error: Reading from socket in Signing Pipe loop: Connection reset by peer

   * What outcome did you expect instead?
     The change were published to dns

See Upstream Bug https://github.com/PowerDNS/pdns/issues/2836
and Upstream Commit https://github.com/PowerDNS/pdns/commit/e94c2c40ac6e0ecf8a5fdf7c415da5c59a8330d6

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-- System Information:
Debian Release: 8.5
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages pdns-server depends on:
ii  adduser                         3.113+nmu3
ii  debconf [debconf-2.0]           1.5.56
ii  init-system-helpers             1.22
ii  libboost-program-options1.55.0  1.55.0+dfsg-3
ii  libboost-serialization1.55.0    1.55.0+dfsg-3
ii  libbotan-1.10-0                 1.10.8-2+deb8u1
ii  libc6                           2.19-18+deb8u4
ii  libcrypto++9                    5.6.1-6+deb8u2
ii  libgcc1                         1:4.9.2-10
ii  libgmp10                        2:6.0.0+dfsg-6
ii  liblua5.1-0                     5.1.5-7.1
ii  libpolarssl7                    1.3.9-2.1+deb8u1
ii  libsqlite3-0                    3.8.7.1-1+deb8u1
ii  libstdc++6                      4.9.2-10
ii  lsb-base                        4.1+Debian13+nmu1
ii  ucf                             3.0030

pdns-server recommends no packages.

Versions of packages pdns-server suggests:
ii  pdns-backend-geo [pdns-backend]  3.4.1-4+deb8u5
ii  pdns-recursor                    3.6.2-2+deb8u2

-- debconf information:
* pdns-server/localaddress: 217.70.197.53
* pdns-server/allowrecursion: 127.0.0.1
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