[libvirt] [PATCH] domain: Fix crash if trying to live update disk <serial>

If you pass <disk><serial> XML to UpdateDevice, and the original device didn't have a <serial> block, libvirtd crashes trying to read the original NULL serial string. Use _NULLABLE string comparisons to avoid the crash. A couple other properties needed the change too. --- src/conf/domain_conf.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index fd0450f..f1e02e3 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -5871,28 +5871,28 @@ virDomainDiskDiffersSourceOnly(virDomainDiskDefPtr disk, CHECK_EQ(transient, "transient", true); - if (disk->serial && STRNEQ(disk->serial, orig_disk->serial)) { + if (disk->serial && STRNEQ_NULLABLE(disk->serial, orig_disk->serial)) { virReportError(VIR_ERR_OPERATION_UNSUPPORTED, _("cannot modify field '%s' of the disk"), "serial"); return false; } - if (disk->wwn && STRNEQ(disk->wwn, orig_disk->wwn)) { + if (disk->wwn && STRNEQ_NULLABLE(disk->wwn, orig_disk->wwn)) { virReportError(VIR_ERR_OPERATION_UNSUPPORTED, _("cannot modify field '%s' of the disk"), "wwn"); return false; } - if (disk->vendor && STRNEQ(disk->vendor, orig_disk->vendor)) { + if (disk->vendor && STRNEQ_NULLABLE(disk->vendor, orig_disk->vendor)) { virReportError(VIR_ERR_OPERATION_UNSUPPORTED, _("cannot modify field '%s' of the disk"), "vendor"); return false; } - if (disk->product && STRNEQ(disk->product, orig_disk->product)) { + if (disk->product && STRNEQ_NULLABLE(disk->product, orig_disk->product)) { virReportError(VIR_ERR_OPERATION_UNSUPPORTED, _("cannot modify field '%s' of the disk"), "product"); -- 2.4.3