1880289 – libvirtd crash when trying to save more than one numa cell without 'cpus' setting

Bug 1880289 - libvirtd crash when trying to save more than one numa cell without 'cpus' setting

Summary: libvirtd crash when trying to save more than one numa cell without 'cpus' set...

Keywords:
Status:	CLOSED ERRATA
Alias:	None
Product:	Red Hat Enterprise Linux Advanced Virtualization
Classification:	Red Hat
Component:	libvirt
Sub Component:
Version:	8.3
Hardware:	Unspecified
OS:	Unspecified
Priority:	unspecified
Severity:	unspecified
Target Milestone:	rc
Target Release:	8.3
Assignee:	Michal Privoznik
QA Contact:	Jing Qi
Docs Contact:
URL:
Whiteboard:
Depends On:
Blocks:	1897025
TreeView+	depends on / blocked

Reported:	2020-09-18 08:23 UTC by yafu
Modified:	2021-05-25 06:44 UTC (History)
CC List:	9 users (show)
Fixed In Version:	libvirt-7.0.0-1.el8
Doc Type:	If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed:	2021-05-25 06:43:36 UTC
Type:	Bug
Target Upstream Version:	6.9.0
Embargoed:
Dependent Products:

Attachments	(Terms of Use)

Description yafu 2020-09-18 08:23:42 UTC

Description of problem:
libvirtd crash when trying to save more than one numa cell without 'cpus' setting 

Version-Release number of selected component (if applicable):
libvirt-6.6.0-6.module+el8.3.0+8125+aefcf088.x86_64
qemu-kvm-5.1.0-8.module+el8.3.0+8141+3cd9cd43.x86_64

How reproducible:
100%

Steps to Reproduce:
1.Edit guest xml:
#virsh edit vm1
...
<cpu>
 <numa>
      <cell id='0'  memory='2097152' unit='KiB' memAccess='shared'/>
      <cell id='1'  memory='2097152' unit='KiB' memAccess='shared'/>
    </numa>
  </cpu>
save xml:
error: Disconnected from qemu:///system due to end of file
error: End of file while reading data: Input/output error
Failed. Try again? [y,n,i,f,?]: 

Actual results:
libvirtd crash when trying to save more than one numa cell without 'cpus' setting  

Expected results:
libvirtd should not crash.

Additional info:
1.Backtrace of libvirtd:
Core was generated by `/usr/sbin/libvirtd --timeout 120'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f0044876318 in virBitmapSubtract () from /lib64/libvirt.so.0
[Current thread is 1 (Thread 0x7f003a479700 (LWP 105527))]

(gdb) t a a bt

Thread 17 (Thread 0x7f00337fe700 (LWP 105532)):
#0  0x00007f00410a12fc in futex_wait_cancelable (private=0, expected=0, futex_word=0x55bc79174570)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f00410a12fc in __pthread_cond_wait_common (abstime=0x0, mutex=0x55bc79174480, cond=0x55bc79174548)
    at pthread_cond_wait.c:502
#2  0x00007f00410a12fc in __pthread_cond_wait (cond=0x55bc79174548, mutex=0x55bc79174480) at pthread_cond_wait.c:655
#3  0x00007f00448f57fa in virCondWait () at /lib64/libvirt.so.0
#4  0x00007f00448f63d8 in virThreadPoolWorker () at /lib64/libvirt.so.0
#5  0x00007f00448f594b in virThreadHelper () at /lib64/libvirt.so.0
#6  0x00007f004109b14a in start_thread (arg=<optimized out>) at pthread_create.c:479
#7  0x00007f00409b0f23 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f0038c76700 (LWP 105531)):
#0  0x00007f00410a12fc in futex_wait_cancelable (private=0, expected=0, futex_word=0x55bc791744d0)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f00410a12fc in __pthread_cond_wait_common (abstime=0x0, mutex=0x55bc79174480, cond=0x55bc791744a8)
    at pthread_cond_wait.c:502
#2  0x00007f00410a12fc in __pthread_cond_wait (cond=0x55bc791744a8, mutex=0x55bc79174480) at pthread_cond_wait.c:655
#3  0x00007f00448f57fa in virCondWait () at /lib64/libvirt.so.0
#4  0x00007f00448f641b in virThreadPoolWorker () at /lib64/libvirt.so.0
#5  0x00007f00448f594b in virThreadHelper () at /lib64/libvirt.so.0
#6  0x00007f004109b14a in start_thread (arg=<optimized out>) at pthread_create.c:479
#7  0x00007f00409b0f23 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7efff95f0700 (LWP 105593)):
#0  0x00007f00410a12fc in futex_wait_cancelable (private=0, expected=0, futex_word=0x55bc7917f794)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f00410a12fc in __pthread_cond_wait_common (abstime=0x0, mutex=0x55bc7917f728, cond=0x55bc7917f768)
--Type <RET> for more, q to quit, c to continue without paging--
    at pthread_cond_wait.c:502
#2  0x00007f00410a12fc in __pthread_cond_wait (cond=0x55bc7917f768, mutex=0x55bc7917f728) at pthread_cond_wait.c:655
#3  0x00007f00448f57fa in virCondWait () at /lib64/libvirt.so.0
#4  0x00007f00234563fc in udevEventHandleThread () at /usr/lib64/libvirt/connection-driver/libvirt_driver_nodedev.so
#5  0x00007f00448f594b in virThreadHelper () at /lib64/libvirt.so.0
#6  0x00007f004109b14a in start_thread (arg=<optimized out>) at pthread_create.c:479
#7  0x00007f00409b0f23 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f0032ffd700 (LWP 105533)):
#0  0x00007f00410a12fc in futex_wait_cancelable (private=0, expected=0, futex_word=0x55bc79174570)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f00410a12fc in __pthread_cond_wait_common (abstime=0x0, mutex=0x55bc79174480, cond=0x55bc79174548)
    at pthread_cond_wait.c:502
#2  0x00007f00410a12fc in __pthread_cond_wait (cond=0x55bc79174548, mutex=0x55bc79174480) at pthread_cond_wait.c:655
#3  0x00007f00448f57fa in virCondWait () at /lib64/libvirt.so.0
#4  0x00007f00448f63d8 in virThreadPoolWorker () at /lib64/libvirt.so.0
#5  0x00007f00448f594b in virThreadHelper () at /lib64/libvirt.so.0
#6  0x00007f004109b14a in start_thread (arg=<optimized out>) at pthread_create.c:479
#7  0x00007f00409b0f23 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f0045420c00 (LWP 105526)):
#0  0x00007f00409a5ca1 in __GI___poll (fds=0x55bc791dfa60, nfds=10, timeout=5000) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f00415049b6 in g_main_context_poll
    (priority=<optimized out>, n_fds=10, fds=0x55bc791dfa60, timeout=<optimized out>, context=0x55bc791df400) at gmain.c:4203
#2  0x00007f00415049b6 in g_main_context_iterate
    (context=context@entry=0x55bc791df400, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>)
    at gmain.c:3897
#3  0x00007f0041504ae0 in g_main_context_iteration (context=0x55bc791df400, may_block=1) at gmain.c:3963
#4  0x00007f004489af44 in virEventGLibRunOnce () at /lib64/libvirt.so.0
--Type <RET> for more, q to quit, c to continue without paging--
#5  0x00007f00449e64a5 in virNetDaemonRun () at /lib64/libvirt.so.0
#6  0x000055bc77d804df in main ()

Thread 12 (Thread 0x7f0033fff700 (LWP 105530)):
#0  0x00007f00410a12fc in futex_wait_cancelable (private=0, expected=0, futex_word=0x55bc791744d0)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f00410a12fc in __pthread_cond_wait_common (abstime=0x0, mutex=0x55bc79174480, cond=0x55bc791744a8)
    at pthread_cond_wait.c:502
#2  0x00007f00410a12fc in __pthread_cond_wait (cond=0x55bc791744a8, mutex=0x55bc79174480) at pthread_cond_wait.c:655
#3  0x00007f00448f57fa in virCondWait () at /lib64/libvirt.so.0
#4  0x00007f00448f641b in virThreadPoolWorker () at /lib64/libvirt.so.0
#5  0x00007f00448f594b in virThreadHelper () at /lib64/libvirt.so.0
#6  0x00007f004109b14a in start_thread (arg=<optimized out>) at pthread_create.c:479
#7  0x00007f00409b0f23 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f002120a700 (LWP 105540)):
#0  0x00007f00410a12fc in futex_wait_cancelable (private=0, expected=0, futex_word=0x55bc791f8190)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f00410a12fc in __pthread_cond_wait_common (abstime=0x0, mutex=0x55bc791f8140, cond=0x55bc791f8168)
    at pthread_cond_wait.c:502
#2  0x00007f00410a12fc in __pthread_cond_wait (cond=0x55bc791f8168, mutex=0x55bc791f8140) at pthread_cond_wait.c:655
#3  0x00007f00448f57fa in virCondWait () at /lib64/libvirt.so.0
#4  0x00007f00448f641b in virThreadPoolWorker () at /lib64/libvirt.so.0
#5  0x00007f00448f594b in virThreadHelper () at /lib64/libvirt.so.0
#6  0x00007f004109b14a in start_thread (arg=<optimized out>) at pthread_create.c:479
#7  0x00007f00409b0f23 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f0022a0d700 (LWP 105537)):
#0  0x00007f00410a12fc in futex_wait_cancelable (private=0, expected=0, futex_word=0x55bc791f8190)
--Type <RET> for more, q to quit, c to continue without paging--
    at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f00410a12fc in __pthread_cond_wait_common (abstime=0x0, mutex=0x55bc791f8140, cond=0x55bc791f8168)
    at pthread_cond_wait.c:502
#2  0x00007f00410a12fc in __pthread_cond_wait (cond=0x55bc791f8168, mutex=0x55bc791f8140) at pthread_cond_wait.c:655
#3  0x00007f00448f57fa in virCondWait () at /lib64/libvirt.so.0
#4  0x00007f00448f641b in virThreadPoolWorker () at /lib64/libvirt.so.0
#5  0x00007f00448f594b in virThreadHelper () at /lib64/libvirt.so.0
#6  0x00007f004109b14a in start_thread (arg=<optimized out>) at pthread_create.c:479
#7  0x00007f00409b0f23 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f0039477700 (LWP 105529)):
#0  0x00007f00410a12fc in futex_wait_cancelable (private=0, expected=0, futex_word=0x55bc791744d0)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f00410a12fc in __pthread_cond_wait_common (abstime=0x0, mutex=0x55bc79174480, cond=0x55bc791744a8)
    at pthread_cond_wait.c:502
#2  0x00007f00410a12fc in __pthread_cond_wait (cond=0x55bc791744a8, mutex=0x55bc79174480) at pthread_cond_wait.c:655
#3  0x00007f00448f57fa in virCondWait () at /lib64/libvirt.so.0
#4  0x00007f00448f641b in virThreadPoolWorker () at /lib64/libvirt.so.0
#5  0x00007f00448f594b in virThreadHelper () at /lib64/libvirt.so.0
#6  0x00007f004109b14a in start_thread (arg=<optimized out>) at pthread_create.c:479
#7  0x00007f00409b0f23 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f002220c700 (LWP 105538)):
#0  0x00007f00410a12fc in futex_wait_cancelable (private=0, expected=0, futex_word=0x55bc791f8190)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f00410a12fc in __pthread_cond_wait_common (abstime=0x0, mutex=0x55bc791f8140, cond=0x55bc791f8168)
    at pthread_cond_wait.c:502
#2  0x00007f00410a12fc in __pthread_cond_wait (cond=0x55bc791f8168, mutex=0x55bc791f8140) at pthread_cond_wait.c:655
#3  0x00007f00448f57fa in virCondWait () at /lib64/libvirt.so.0
--Type <RET> for more, q to quit, c to continue without paging--
#4  0x00007f00448f641b in virThreadPoolWorker () at /lib64/libvirt.so.0
#5  0x00007f00448f594b in virThreadHelper () at /lib64/libvirt.so.0
#6  0x00007f004109b14a in start_thread (arg=<optimized out>) at pthread_create.c:479
#7  0x00007f00409b0f23 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f0020a09700 (LWP 105541)):
#0  0x00007f00410a12fc in futex_wait_cancelable (private=0, expected=0, futex_word=0x55bc791f8190)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f00410a12fc in __pthread_cond_wait_common (abstime=0x0, mutex=0x55bc791f8140, cond=0x55bc791f8168)
    at pthread_cond_wait.c:502
#2  0x00007f00410a12fc in __pthread_cond_wait (cond=0x55bc791f8168, mutex=0x55bc791f8140) at pthread_cond_wait.c:655
#3  0x00007f00448f57fa in virCondWait () at /lib64/libvirt.so.0
#4  0x00007f00448f641b in virThreadPoolWorker () at /lib64/libvirt.so.0
#5  0x00007f00448f594b in virThreadHelper () at /lib64/libvirt.so.0
#6  0x00007f004109b14a in start_thread (arg=<optimized out>) at pthread_create.c:479
#7  0x00007f00409b0f23 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f0031ffb700 (LWP 105535)):
#0  0x00007f00410a12fc in futex_wait_cancelable (private=0, expected=0, futex_word=0x55bc79174574)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f00410a12fc in __pthread_cond_wait_common (abstime=0x0, mutex=0x55bc79174480, cond=0x55bc79174548)
    at pthread_cond_wait.c:502
#2  0x00007f00410a12fc in __pthread_cond_wait (cond=0x55bc79174548, mutex=0x55bc79174480) at pthread_cond_wait.c:655
#3  0x00007f00448f57fa in virCondWait () at /lib64/libvirt.so.0
#4  0x00007f00448f63d8 in virThreadPoolWorker () at /lib64/libvirt.so.0
#5  0x00007f00448f594b in virThreadHelper () at /lib64/libvirt.so.0
#6  0x00007f004109b14a in start_thread (arg=<optimized out>) at pthread_create.c:479
#7  0x00007f00409b0f23 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

--Type <RET> for more, q to quit, c to continue without paging--
Thread 5 (Thread 0x7f0039c78700 (LWP 105528)):
#0  0x00007f00410a12fc in futex_wait_cancelable (private=0, expected=0, futex_word=0x55bc791744d0)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f00410a12fc in __pthread_cond_wait_common (abstime=0x0, mutex=0x55bc79174480, cond=0x55bc791744a8)
    at pthread_cond_wait.c:502
#2  0x00007f00410a12fc in __pthread_cond_wait (cond=0x55bc791744a8, mutex=0x55bc79174480) at pthread_cond_wait.c:655
#3  0x00007f00448f57fa in virCondWait () at /lib64/libvirt.so.0
#4  0x00007f00448f641b in virThreadPoolWorker () at /lib64/libvirt.so.0
#5  0x00007f00448f594b in virThreadHelper () at /lib64/libvirt.so.0
#6  0x00007f004109b14a in start_thread (arg=<optimized out>) at pthread_create.c:479
#7  0x00007f00409b0f23 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f00327fc700 (LWP 105534)):
#0  0x00007f00410a12fc in futex_wait_cancelable (private=0, expected=0, futex_word=0x55bc79174570)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f00410a12fc in __pthread_cond_wait_common (abstime=0x0, mutex=0x55bc79174480, cond=0x55bc79174548)
    at pthread_cond_wait.c:502
#2  0x00007f00410a12fc in __pthread_cond_wait (cond=0x55bc79174548, mutex=0x55bc79174480) at pthread_cond_wait.c:655
#3  0x00007f00448f57fa in virCondWait () at /lib64/libvirt.so.0
#4  0x00007f00448f63d8 in virThreadPoolWorker () at /lib64/libvirt.so.0
#5  0x00007f00448f594b in virThreadHelper () at /lib64/libvirt.so.0
#6  0x00007f004109b14a in start_thread (arg=<optimized out>) at pthread_create.c:479
#7  0x00007f00409b0f23 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f0021a0b700 (LWP 105539)):
#0  0x00007f00410a12fc in futex_wait_cancelable (private=0, expected=0, futex_word=0x55bc791f8190)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f00410a12fc in __pthread_cond_wait_common (abstime=0x0, mutex=0x55bc791f8140, cond=0x55bc791f8168)
    at pthread_cond_wait.c:502
--Type <RET> for more, q to quit, c to continue without paging--
#2  0x00007f00410a12fc in __pthread_cond_wait (cond=0x55bc791f8168, mutex=0x55bc791f8140) at pthread_cond_wait.c:655
#3  0x00007f00448f57fa in virCondWait () at /lib64/libvirt.so.0
#4  0x00007f00448f641b in virThreadPoolWorker () at /lib64/libvirt.so.0
#5  0x00007f00448f594b in virThreadHelper () at /lib64/libvirt.so.0
#6  0x00007f004109b14a in start_thread (arg=<optimized out>) at pthread_create.c:479
#7  0x00007f00409b0f23 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f00317fa700 (LWP 105536)):
#0  0x00007f00410a12fc in futex_wait_cancelable (private=0, expected=0, futex_word=0x55bc79174574)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f00410a12fc in __pthread_cond_wait_common (abstime=0x0, mutex=0x55bc79174480, cond=0x55bc79174548)
    at pthread_cond_wait.c:502
#2  0x00007f00410a12fc in __pthread_cond_wait (cond=0x55bc79174548, mutex=0x55bc79174480) at pthread_cond_wait.c:655
#3  0x00007f00448f57fa in virCondWait () at /lib64/libvirt.so.0
#4  0x00007f00448f63d8 in virThreadPoolWorker () at /lib64/libvirt.so.0
#5  0x00007f00448f594b in virThreadHelper () at /lib64/libvirt.so.0
#6  0x00007f004109b14a in start_thread (arg=<optimized out>) at pthread_create.c:479
#7  0x00007f00409b0f23 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f003a479700 (LWP 105527)):
#0  0x00007f0044876318 in virBitmapSubtract () at /lib64/libvirt.so.0
#1  0x00007f004496b023 in virDomainNumaFillCPUsInNode () at /lib64/libvirt.so.0
#2  0x00007f0022aa4afb in qemuDomainDefNumaCPUsRectify () at /usr/lib64/libvirt/connection-driver/libvirt_driver_qemu.so
#3  0x00007f0022ab4812 in qemuDomainDefPostParse () at /usr/lib64/libvirt/connection-driver/libvirt_driver_qemu.so
#4  0x00007f0044960b6a in virDomainDefPostParse () at /lib64/libvirt.so.0
#5  0x00007f0044961a8c in virDomainDefParseNode () at /lib64/libvirt.so.0
#6  0x00007f0044961b9f in virDomainDefParse () at /lib64/libvirt.so.0
#7  0x00007f0022b35aac in qemuDomainDefineXMLFlags () at /usr/lib64/libvirt/connection-driver/libvirt_driver_qemu.so
#8  0x00007f0044ab3084 in virDomainDefineXMLFlags () at /lib64/libvirt.so.0
--Type <RET> for more, q to quit, c to continue without paging--
#9  0x000055bc77d8c83e in remoteDispatchDomainDefineXMLFlagsHelper ()
#10 0x00007f00449e1aa9 in virNetServerProgramDispatch () at /lib64/libvirt.so.0
#11 0x00007f00449e6ca6 in virNetServerHandleJob () at /lib64/libvirt.so.0
#12 0x00007f00448f634f in virThreadPoolWorker () at /lib64/libvirt.so.0
#13 0x00007f00448f594b in virThreadHelper () at /lib64/libvirt.so.0
#14 0x00007f004109b14a in start_thread (arg=<optimized out>) at pthread_create.c:479
#15 0x00007f00409b0f23 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Comment 1 Michal Privoznik 2020-09-30 09:55:14 UTC

Patch proposed upstream:

https://www.redhat.com/archives/libvir-list/2020-September/msg01550.html

Comment 3 Michal Privoznik 2020-10-01 08:38:43 UTC

Pushed upstream as:

2752a67826 virDomainNumaFillCPUsInNode: Skip over NUMA nodes without vCPUs

v6.8.0-19-g2752a67826

Comment 4 Michal Privoznik 2020-12-01 12:57:30 UTC

Moving to POST per comment 3.

Comment 5 Jing Qi 2020-12-14 10:01:21 UTC

Tested with libvirt-daemon-6.10.0-1.module+el8.4.0+8898+a84e86e1.x86_64 & 
qemu-kvm-5.2.0-0.module+el8.4.0+8855+a9e237a9.x86_64
s1:
step
1.Edit guest xml:
#virsh edit vm1
  <vcpu placement='static'>4</vcpu>
  <cpu>
   <numa>
    <cell id='0' memory='1' unit='GiB' memAccess='shared'/>
    <cell id='1' memory='1' unit='GiB' memAccess='shared'/>
   </numa>
  </cpu>

2. Save & dump domain xml:

    <numa>
      <cell id='0' cpus='0-3' memory='1048576' unit='KiB' memAccess='shared'/>
      <cell id='1' memory='1048576' unit='KiB' memAccess='shared'/>
    </numa>

Result: No libvirtd crash.

Comment 8 Jing Qi 2021-01-18 08:10:42 UTC

Verified in versions:
libvirt-daemon-7.0.0-1.module+el8.4.0+9464+3e71831a.x86_64
qemu-kvm-5.2.0-2.module+el8.4.0+9186+ec44380f.x86_64

s1: Save domain without setting vcpus in numa nodes and domain still have non-assigned vcpus.
step
1.Edit guest xml:
#virsh edit vm1
  <vcpu placement='static'>4</vcpu>
  <cpu>
   <numa>
    <cell id='0' memory='1' unit='GiB' memAccess='shared'/>
    <cell id='1' memory='1' unit='GiB' memAccess='shared'/>
   </numa>
  </cpu>

2. Save & dump domain xml:

    <numa>
      <cell id='0' cpus='0-3' memory='1048576' unit='KiB' memAccess='shared'/>
      <cell id='1' memory='1048576' unit='KiB' memAccess='shared'/>
    </numa>

3. Start domain.
  # virsh start vm1
Domain 'vm1' started

Result: No libvirtd crash.

Comment 10 errata-xmlrpc 2021-05-25 06:43:36 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (virt:av bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2021:2098

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