Package: libvirt-daemon
Version: 1.2.9-4
Severity: serious
libvirt_lxc dies with null pointer access almost immediately.
Kernel log shows:
| libvirt_lxc[5030]: segfault at 0 ip 7fe434292fb6 sp 7fe43851ddf8
error 4 in libc-2.19.so[7fe43416e000+19f000]
strace shows:
| access(/sbin/init, F_OK) = 0
| --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0} ---
| +++ killed by SIGSEGV (core dumped) +++
The core file shows:
| #0 0x7fabd5168fb6 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
| #1 0x7fabd87cabd9 in lxcContainerGetNetDef (vmDef=optimized out,
vmDef=optimized out, devName=optimized out)
| at ../../../src/lxc/lxc_container.c:476
| #2 lxcContainerRenameAndEnableInterfaces (veths=optimized out,
nveths=optimized out, vmDef=optimized out)
| at ../../../src/lxc/lxc_container.c:506
| #3 lxcContainerChild (data=0x7fabda1212b0) at
../../../src/lxc/lxc_container.c:2127
| #4 0x7fabd5129ccd in clone () from /lib/x86_64-linux-gnu/libc.so.6
| (gdb) f 1
| #1 0x7fabd87cabd9 in lxcContainerGetNetDef (vmDef=optimized out,
vmDef=optimized out, devName=optimized out)
| at ../../../src/lxc/lxc_container.c:476
| 476 ../../../src/lxc/lxc_container.c: No such file or directory.
| (gdb) info locals
| i = 0
| netDef = 0x7fabda13bde0
| (gdb) p netDef
| $1 = (virDomainNetDefPtr) 0x7fabda13bde0
| (gdb) p *netDef.ifname_guest_actual
| Cannot access memory at address 0x0
Relevant vm config:
| domain type='lxc'
| nameexample/name
| uuide315c3e7-e257-4635-a9a0-75e4cd909fa0/uuid
| memory unit='KiB'50/memory
| currentMemory unit='KiB'50/currentMemory
| vcpu placement='static'1/vcpu
| resource
| partition/machine/partition
| /resource
| os
| type arch='x86_64'exe/type
| init/sbin/init/init
| /os
| clock offset='utc'/
| on_poweroffdestroy/on_poweroff
| on_rebootrestart/on_reboot
| on_crashdestroy/on_crash
| devices
| emulator/usr/lib/libvirt/libvirt_lxc/emulator
| filesystem type='mount' accessmode='passthrough'
| source dir='/vm'/
| target dir='/'/
| /filesystem
| interface type='direct'
| mac address='52:54:00:f3:21:f9'/
| source dev='eth0' mode='private'/
| /interface
| console type='pty'
| target type='lxc' port='0'/
| /console
| /devices
| /domain
Bastian
-- System Information:
Debian Release: jessie/sid
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable'), (500, 'stable'), (1,
'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 3.16-3-amd64 (SMP w/4 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
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