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Re: [libvirt] Segfault in virDomainObjListSearchName when listing domains (qemu backend)



On Fri, Jun 25, 2010 at 05:34:56PM +0200, Guido Winkelmann wrote:
> Hi,
> 
> I'm seeing a crash in libvirt when trying to list all domains using virsh. 
> Here's the backtrace:
> 
> =====================
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 0x7fffeebfd710 (LWP 1691)]
> 0x00007ffff7411746 in __strcmp_sse42 () from /lib64/libc.so.6
> Missing separate debuginfos, use: debuginfo-install 
> openssl-1.0.0a-1.fc12.x86_64
> (gdb) bt
> #0  0x00007ffff7411746 in __strcmp_sse42 () from /lib64/libc.so.6
> #1  0x00007ffff7ac9d79 in virDomainObjListSearchName (payload=0x73fdd0, 
> name=<value optimized out>, data=0x7fffdc0008c0) at conf/domain_conf.c:367
> #2  0x00007ffff7ab476e in virHashSearch (table=0x6f9c30, iter=0x7ffff7ac9d50 
> <virDomainObjListSearchName>, data=0x7fffdc0008c0) at util/hash.c:582
> #3  0x00007ffff7ac9d33 in virDomainFindByName (doms=<value optimized out>, 
> name=0x7fffdc0008c0 "basiccentos54image") at conf/domain_conf.c:377
> #4  0x00000000004430f6 in qemudDomainLookupByName (conn=0x7fffe8000a80, 
> name=0x7fffdc0008c0 "basiccentos54image") at qemu/qemu_driver.c:4166
> #5  0x00007ffff7af95cd in virDomainLookupByName (conn=0x7fffe8000a80, 
> name=0x7fffdc0008c0 "basiccentos54image") at libvirt.c:2169
> #6  0x0000000000423e64 in remoteDispatchDomainLookupByName (server=<value 
> optimized out>, client=<value optimized out>, conn=0x7fffe8000a80, hdr=<value 
> optimized out>, rerr=0x7fffeebfcc70,
>     args=<value optimized out>, ret=0x7fffeebfcbc0) at remote.c:2030
> #7  0x0000000000426a91 in remoteDispatchClientCall (server=<value optimized 
> out>, client=0x7ffff0001300, msg=0x7ffff0041570) at dispatch.c:506
> #8  0x0000000000426e43 in remoteDispatchClientRequest (server=0x6e3cd0, 
> client=0x7ffff0001300, msg=0x7ffff0041570) at dispatch.c:388
> #9  0x0000000000417ed8 in qemudWorker (data=0x7ffff0000908) at libvirtd.c:1568
> #10 0x00007ffff7878a3a in start_thread () from /lib64/libpthread.so.0
> #11 0x00007ffff73d377d in clone () from /lib64/libc.so.6
> #12 0x0000000000000000 in ?? ()
> (gdb)
> =====================
> 
> This is with the newest version from git, pulled about 30 minutes ago.
> 
> This happens when I try to start up one of the defined domains using either 
> libvirt or virsh and then try to list all the defined domains in virsh using 
> list --all.
> 
> The attempt to start one of the domains already fails with the following 
> output:
> =====================
> virsh # start testserver-a
> error: Failed to start domain testserver-a
> error: internal error process exited while connecting to monitor: 

Can you provide the XML config for this guest, and the associated
/var/log/libvirt/qemu/testserver-a.log file

> 17:21:14.760: debug : virCgroupNew:542 : New group /libvirt/qemu/testserver-a
> 17:21:14.760: debug : virCgroupDetect:232 : Detected mount/mapping 0:cpu at 
> /mnt/cgroups/cpu in /sysdefault
> 17:21:14.760: debug : virCgroupDetect:232 : Detected mount/mapping 1:cpuacct 
> at /mnt/cgroups/cpuacct in /sysdefault
> 17:21:14.760: debug : virCgroupDetect:232 : Detected mount/mapping 3:memory at 
> /mnt/cgroups/memory in /sysdefault
> 17:21:14.760: debug : virCgroupDetect:232 : Detected mount/mapping 4:devices 
> at /mnt/cgroups/devices in /sysdefault
> 17:21:14.760: debug : virCgroupMakeGroup:484 : Make group 
> /libvirt/qemu/testserver-a
> 17:21:14.760: debug : virCgroupMakeGroup:496 : Make controller 
> /mnt/cgroups/cpu/sysdefault/libvirt/qemu/testserver-a/
> 17:21:14.760: debug : virCgroupMakeGroup:496 : Make controller 
> /mnt/cgroups/cpuacct/sysdefault/libvirt/qemu/testserver-a/
> 17:21:14.760: debug : virCgroupMakeGroup:496 : Make controller 
> /mnt/cgroups/memory/sysdefault/libvirt/qemu/testserver-a/
> =====================
> 
> This happens with all the domains I have currently defined.
> 
> Calling list --all before that produces no problems.
> 
> Calling list --all after that always produces said crash.
> 
> qemu is qemu-kvm 0.12.4, built from sources.
> 
> The host system is a Fedora 12 install.

Daniel
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