[Bug 1728310] Re: libnfsidmap2 fails to obtain username which results in failed translation

[Simon Quigley]

I apologize for the very long delay in this getting attention. Please
edit the bug report to follow the SRU guidelines:
https://wiki.ubuntu.com/StableReleaseUpdates#SRU_Bug_Template

Please resubscribe ~ubuntu-sponsors once that's done.

Thank you.

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https://bugs.launchpad.net/bugs/1728310

Title:
  libnfsidmap2 fails to obtain username which results in failed
  translation

Status in libnfsidmap package in Ubuntu:
  Confirmed
Status in libnfsidmap package in Debian:
  New

Bug description:
  Environment: IPA + NFSv4 (sec=krb5).

  nss.c uses wrong '@' sign to detect the NFS domain resulting in
  "nobody" ownerships and the following error messages in an IPA
  environment:

  Oct 25 16:49:42 ubuntu-16.04-client.sub.localdomain nfsidmap[6163]: key: 0x2c254c26 type: uid value: rns at localdomain@ipa.localdomain timeout 600
  Oct 25 16:49:42 ubuntu-16.04-client.sub.localdomain nfsidmap[6163]: nfs4_name_to_uid: calling nsswitch->name_to_uid
  Oct 25 16:49:42 ubuntu-16.04-client.sub.localdomain nfsidmap[6163]: nss_getpwnam: name 'rns at localdomain@ipa.localdomain' domain 'ipa.localdomain': resulting localname '(null)'
  Oct 25 16:49:42 ubuntu-16.04-client.sub.localdomain nfsidmap[6163]: nss_getpwnam: name 'rns at localdomain@ipa.localdomain' does not map into domain 'ipa.localdomain'
  Oct 25 16:49:42 ubuntu-16.04-client.sub.localdomain nfsidmap[6163]: nfs4_name_to_uid: nsswitch->name_to_uid returned -22
  Oct 25 16:49:42 ubuntu-16.04-client.sub.localdomain nfsidmap[6163]: nfs4_name_to_uid: final return value is -22

  Affects at least libnfsidmap2=0.25-5 and 0.25-5.1 on 16.04, 16.10,
  17.04, 17.10

  Corresponding Debian bug report: https://bugs.debian.org/cgi-
  bin/bugreport.cgi?bug=744768

  Tested patch attached.

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