rpc.mountd crashed with SIGSEGV

[Uldis Kalniņš]

Crash occurs upon connection from Virtualbox nfs client (Ubuntu 14.04)
Crash occurs at the moment, when client is unable to connect and is terminated with Ctrl^C

cat /etc/exports
/home 10.218.2.100(rw,sync,no_root_squash,no_subtree_check)
/var/nfs 10.218.2.100(rw,sync,no_subtree_check)

lsb_release -rd
Description: Ubuntu Utopic Unicorn (development branch)
Release: 14.10

apt-cache policy nfs-kernel-server
nfs-kernel-server:
  Instalēts: 1:1.2.8-8ubuntu1
  Kandidāts: 1:1.2.8-8ubuntu1
  Versiju tabula:
 *** 1:1.2.8-8ubuntu1 0
        500 http://archive.ubuntu.com/ubuntu/ utopic/main amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Crash
DistroRelease: Ubuntu 14.10
Package: nfs-kernel-server 1:1.2.8-8ubuntu1
ProcVersionSignature: Ubuntu 3.16.0-7.12-lowlatency 3.16.0
Uname: Linux 3.16.0-7-lowlatency x86_64
ApportVersion: 2.14.5-0ubuntu4
Architecture: amd64
CrashCounter: 1
Date: Wed Aug 13 16:08:22 2014
ExecutablePath: /usr/sbin/rpc.mountd
InstallationDate: Installed on 2013-10-17 (299 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
ProcCmdline: /usr/sbin/rpc.mountd --manage-gids
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=lv_LV.UTF-8
SegvAnalysis:
 Segfault happened at: 0x4096a4: cmpb $0x0,(%r15)
 PC (0x004096a4) ok
 source "$0x0" ok
 destination "(%r15)" (0x00000000) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: nfs-utils
StacktraceTop:
 ?? ()
 ?? ()
 ?? ()
 ?? ()
 ?? ()
SystemImageInfo: Error: [Errno 2] No such file or directory: 'system-image-cli'
Title: rpc.mountd crashed with SIGSEGV
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 add_name (add=0x2546300 "10.218.2.100", old=0x0) at client.c:490
 client_compose (ai=ai@entry=0x2546690) at client.c:419
 auth_unix_ip (f=0x2538010) at cache.c:112
 cache_process_req (readfds=readfds@entry=0x7fff4a1b2570) at cache.c:1262
 my_svc_run () at svc_run.c:117

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Tyler Hicks (tyhicks)]

Bumping this up to high since it seems to break nfs mounts.

I'm hitting it with a fully updated utopic client and utopic server running version 1:1.2.8-8ubuntu1 of nfs-utils.

Downgrading the server to 1:1.2.8-6ubuntu4 allows my nfs mounts to succeed.

[Tyler Hicks (tyhicks)]

This bug is dupe of bug #1355829. Debian has a fix for this crasher with package version 1:1.2.8-9.