[Bug 1416793] Re: ifquery segfaults if /run/network/ifstate file is not found

[Wladimir J. van der Laan]

I have a similar, but different segfault at VM startup in ifquery with
Ubuntu 15.10:

[    4.184292] ifquery[392]: segfault at 0 ip 00007feb81430b10 sp
00007ffd18d03388 error 4 in libc-2.21.so[7feb813a5000+1c0000]

addr2line -aipfC -e /lib/x86_64-linux-gnu/libc-2.21.so 0x8bb10
0x000000000008bb10: strncmp at ??:?

So it segfaults in a string comparison somewhere. Unfortunately, as I
can't reproduce it besides the startup process, I don't have more of a
traceback.

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https://bugs.launchpad.net/bugs/1416793

Title:
  ifquery segfaults if /run/network/ifstate file is not found

Status in ifupdown package in Ubuntu:
  Confirmed

Bug description:
  This makes the ifup at .service systemd unit file sad.

  version 0.7.48.1ubuntu6 [amd64]

  command:  ifquery --state eth0

  after a mkdir /run/network/ and a touch /run/network/ifstate the
  command above runs, but produces no output.

  Thanks for looking into this!

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