[Bug 940260] Re: resolvconf should deal with corrupted dns-nameservers lines

[Steve Langasek]

*** This bug is a duplicate of bug 932275 ***
    https://bugs.launchpad.net/bugs/932275

no reason to have this as a separate bug.  Marking this as a duplicate
of bug #932275, and opening a resolvconf task there.

** This bug has been marked a duplicate of bug 932275
   Bogus or no nameserver information written to /etc/network/interfaces

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https://bugs.launchpad.net/bugs/940260

Title:
  resolvconf should deal with corrupted dns-nameservers lines

Status in “resolvconf” package in Ubuntu:
  New

Bug description:
  Because of netcfg bug #932275, every system that was installed with
  static network configuration using the flawed netcfg originally had,
  and probably still has, a corrupted /etc/network/interface file.

  IIUC Oneiric systems are affected, not Natty or earlier ones. Someone
  please check this.

  The corruption: The string following "dns-nameservers" consists of
  arbitrary bytes instead of being the string representation of an IP
  address.

  1. We need to check ifupdown and resolvconf code, thinking about what will happen when they get fed such dns-nameservers lines.
  2. Perhaps resolvconf should check the validity of each nameserver address string fed to it. Currently it doesn't do so, even though it does some "normalization" of address strings.
  3. Perhaps the maintainer scripts should detect a flawed-netcfg-corrupted /e/n/i and either notify the admin or give her the opportunity (via debconf?) to repair the corrupted file.
  -- 
  Thomas Hood

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