Public bug reported:
Doing a test install of precise with static networking, I noticed bogus
(non-ASCII) data written on the dns-nameservers line in
/etc/network/interfaces, which was then be carried over to resolv.conf
by the resolvconf package. Other times, this line would simply not be in
/etc/network/interfaces at all.
After looking at the code and doing some testing, the problem seems to
be that at the end of static.c, the netcfg_write_resolvconf_options is
called with the nameserver_array array, but this array is never actually
populated. So, in the best-case scenario, it's pointing at zeros in
memory and doesn't put anything in the interfaces file, but in other
cases, spits out whatever happens to be in memory. :-) As near as I can
tell, it looks like this happened somewhere between version 1.68 from
debian and version 1.68ubuntu1.
The fix is to either pass the namserver array from the iface struct, or
just pass the struct itself and deal with it in the
netcfg_write_resolvconf_options function.
I'll attach two patches - a quick-and-dirty one and one that matches the
way the netcfg_write_resolv function works.
I'd love to have someone who's more familiar with the code have a look
and make sure that I'm not doing anything bad, and then if it's helpful,
I'm happy to create a debdiff.
Thanks and let me know if you have any questions or if there's any more
info I can provide.
** Affects: netcfg (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/932275
Title:
Bogus or no nameserver information written to /etc/network/interfaces
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