NetworkManager crashed with SIGSEGV in nm_ip4_config_get_nameserver()

[Xavier Bassery]

NetworkManager crashes as soon as I try to activate my VPN connection (openVPN).
As mentioned in bug #915825, removing the new "dns=dnsmasq" line from /etc/NetworkManager/NetworkManager.conf prevents this crash from happening.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: network-manager 0.9.2.0+git201201101813.0b30200-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-8.15-generic-pae 3.2.0
Uname: Linux 3.2.0-8-generic-pae i686
NonfreeKernelModules: nvidia
ApportVersion: 1.90-0ubuntu2
Architecture: i386
CrashCounter: 1
Date: Sat Jan 14 16:36:56 2012
ExecutablePath: /usr/sbin/NetworkManager
ExecutableTimestamp: 1326362903
IfupdownConfig:
 auto lo
 iface lo inet loopback
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110320)
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
ProcCmdline: NetworkManager
ProcCwd: /
ProcEnviron: PATH=(custom, no user)
SegvAnalysis:
 Segfault happened at: 0x80888fa <nm_ip4_config_get_nameserver+106>: mov (%eax,%edx,4),%eax
 PC (0x080888fa) ok
 source "(%eax,%edx,4)" (0x00000000) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: network-manager
StacktraceTop:
 nm_ip4_config_get_nameserver (config=0x91dda30, i=0) at nm-ip4-config.c:223
 add_ip4_config (str=0x91920b0, ip4=0x91dda30, split=1) at nm-dns-dnsmasq.c:85
 update (plugin=0x91926f0, vpn_configs=0x91d2928, dev_configs=0x91bff48, other_configs=0x0, hostname=0x0, iface=0x91d2a38 "tun0") at nm-dns-dnsmasq.c:291
 nm_dns_plugin_update (self=0x91926f0, vpn_configs=0x91d2928, dev_configs=0x91bff48, other_configs=0x0, hostname=0x0, iface=0x91d2a38 "tun0") at nm-dns-plugin.c:63
 update_dns (self=<optimized out>, iface=0x91d2a38 "tun0", no_caching=0, error=0xbffc3b2c) at nm-dns-manager.c:710
Title: NetworkManager crashed with SIGSEGV in nm_ip4_config_get_nameserver()
UpgradeStatus: Upgraded to precise on 2011-10-06 (99 days ago)
UserGroups:

nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH
 eth0 802-3-ethernet unavailable /org/freedesktop/NetworkManager/Devices/0
 wlan0 802-11-wireless connected /org/freedesktop/NetworkManager/Devices/1
nmcli-nm:
 RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
 running 0.9.3.0 connected enabled enabled enabled enabled disabled