[libvirt] [PATCH 08/11] Don't allow renaming of domains by the backdoor

From: "Daniel P. Berrange" <berrange(a)redhat.com&gt; Several APIs allow for custom XML to be passed in. This is checked for ABI stability, which will ensure the UUID is not being changed. There isn't validation that the name did not change though. This could allow renaming of guests via the backdoor, which in turn could allow for bypassing access control restrictions based on names. Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com&gt; --- src/conf/domain_conf.c | 11 +++++++++++ src/qemu/qemu_migration.c | 6 ------ 2 files changed, 11 insertions(+), 6 deletions(-) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index a8b5dfd..d945b74 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -12560,6 +12560,17 @@ virDomainDefCheckABIStability(virDomainDefPtr src, return false; } + /* Not strictly ABI related, but we want to make sure domains + * don't get silently re-named through the backdoor when passing + * custom XML into various APIs, since this would create havoc + */ + if (STRNEQ(src->name, dst->name)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("Target domain name '%s' does not match source '%s'"), + dst->name, src->name); + return false; + } + if (src->mem.max_balloon != dst->mem.max_balloon) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("Target domain max memory %lld does not match source %lld"), diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c index c0b6453..ebd0382 100644 --- a/src/qemu/qemu_migration.c +++ b/src/qemu/qemu_migration.c @@ -1941,12 +1941,6 @@ char *qemuMigrationBegin(virQEMUDriverPtr driver, VIR_DOMAIN_XML_INACTIVE))) goto cleanup; - if (STRNEQ(def->name, vm->def->name)) { - virReportError(VIR_ERR_INVALID_ARG, "%s", - _("target domain name doesn't match source name")); - goto cleanup; - } - if (!virDomainDefCheckABIStability(vm->def, def)) goto cleanup; -- 1.8.1.4