Since qemuDomainDefPostParse callback requires qemuCaps, we need to make sure it gets the capabilities stored in the domain's private data if the domain is running. Passing NULL may cause QEMU capabilities probing to be triggered in case QEMU binary changed in the meantime. When this happens while a running domain object is locked, QMP event delivered to the domain before QEMU capabilities probing finishes will deadlock the event loop. This patch fixes all paths leading to qemuMigrationCookieXMLParse. Signed-off-by: Jiri Denemark <jdenemar@xxxxxxxxxx> --- src/qemu/qemu_migration_cookie.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/src/qemu/qemu_migration_cookie.c b/src/qemu/qemu_migration_cookie.c index 74a12d1b03..da5bc8d05f 100644 --- a/src/qemu/qemu_migration_cookie.c +++ b/src/qemu/qemu_migration_cookie.c @@ -1197,6 +1197,7 @@ qemuMigrationCookieCapsXMLParse(xmlXPathContextPtr ctxt) static int qemuMigrationCookieXMLParse(qemuMigrationCookiePtr mig, virQEMUDriverPtr driver, + virQEMUCapsPtr qemuCaps, xmlDocPtr doc, xmlXPathContextPtr ctxt, unsigned int flags) @@ -1338,7 +1339,7 @@ qemuMigrationCookieXMLParse(qemuMigrationCookiePtr mig, goto error; } mig->persistent = virDomainDefParseNode(doc, nodes[0], - caps, driver->xmlopt, NULL, + caps, driver->xmlopt, qemuCaps, VIR_DOMAIN_DEF_PARSE_INACTIVE | VIR_DOMAIN_DEF_PARSE_ABI_UPDATE_MIGRATION | VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE); @@ -1391,6 +1392,7 @@ qemuMigrationCookieXMLParse(qemuMigrationCookiePtr mig, static int qemuMigrationCookieXMLParseStr(qemuMigrationCookiePtr mig, virQEMUDriverPtr driver, + virQEMUCapsPtr qemuCaps, const char *xml, unsigned int flags) { @@ -1403,7 +1405,7 @@ qemuMigrationCookieXMLParseStr(qemuMigrationCookiePtr mig, if (!(doc = virXMLParseStringCtxt(xml, _("(qemu_migration_cookie)"), &ctxt))) goto cleanup; - ret = qemuMigrationCookieXMLParse(mig, driver, doc, ctxt, flags); + ret = qemuMigrationCookieXMLParse(mig, driver, qemuCaps, doc, ctxt, flags); cleanup: xmlXPathFreeContext(ctxt); @@ -1505,6 +1507,7 @@ qemuMigrationEatCookie(virQEMUDriverPtr driver, if (cookiein && cookieinlen && qemuMigrationCookieXMLParseStr(mig, driver, + priv->qemuCaps, cookiein, flags) < 0) goto error; -- 2.22.0 -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list