multiple parallel timedout vcpu hotunplug requests coming from qemu handled asynchronously by libvirt can cause data corruption as they modify vcpu data during refresh by libvirt. Lock each vcpu before modification and then release the lock Signed-off-by: Shaleen Bathla <shaleen.bathla(a)oracle.com&gt; --- src/qemu/qemu_domain.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index 3469f0d40c59..15ec1b0a771a 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -10084,6 +10084,7 @@ qemuDomainRefreshVcpuInfo(virDomainObj *vm, for (i = 0; i < maxvcpus; i++) { vcpu = virDomainDefGetVcpu(vm->def, i); vcpupriv = QEMU_DOMAIN_VCPU_PRIVATE(vcpu); + virObjectLock(vcpupriv); if (validTIDs) vcpupriv->tid = info[i].tid; @@ -10113,6 +10114,7 @@ qemuDomainRefreshVcpuInfo(virDomainObj *vm, else vcpu->hotpluggable = VIR_TRISTATE_BOOL_NO; } + virObjectUnlock(vcpupriv); } ret = 0; -- 2.39.3