[libvirt] [PATCH] Fix modifying disk devices in qemu driver

When modifying the disk devices of a live domain and the domain configuration, the function qemuDomainAttachDeviceConfig first sets dev->data->disk to NULL. Later qemuDomainAttachDeviceLive accesses dev->data.disk and causes a segfault. --- src/qemu/qemu_driver.c | 14 ++++++++++---- 1 files changed, 10 insertions(+), 4 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index b8d9c92..55e6314 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -4278,12 +4278,13 @@ qemuDomainModifyDeviceFlags(virDomainPtr dom, const char *xml, "%s", _("cannot modify device on transient domain")); goto endjob; } - dev = virDomainDeviceDefParse(driver->caps, vm->def, xml, - VIR_DOMAIN_XML_INACTIVE); - if (dev == NULL) - goto endjob; if (flags & VIR_DOMAIN_DEVICE_MODIFY_CONFIG) { + dev = virDomainDeviceDefParse(driver->caps, vm->def, xml, + VIR_DOMAIN_XML_INACTIVE); + if (dev == NULL) + goto endjob; + /* Make a copy for updated domain. */ vmdef = virDomainObjCopyPersistentDef(driver->caps, vm); if (!vmdef) @@ -4307,6 +4308,11 @@ qemuDomainModifyDeviceFlags(virDomainPtr dom, const char *xml, ret = 0; if (!ret && (flags & VIR_DOMAIN_DEVICE_MODIFY_LIVE)) { + dev = virDomainDeviceDefParse(driver->caps, vm->def, xml, + VIR_DOMAIN_XML_INACTIVE); + if (dev == NULL) + goto endjob; + switch (action) { case QEMU_DEVICE_ATTACH: ret = qemuDomainAttachDeviceLive(vm, dev, dom); -- 1.7.5.1