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domain: Fix crash if trying to live update disk <serial>

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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.

(cherry picked from commit c7790408d7e16b1ad00a690433d9310f104994f7)
This commit is contained in:
Cole Robinson 2015-08-10 19:01:43 -04:00
parent 85cf1ad5aa
commit 79be4dbecb
1 changed files with 4 additions and 4 deletions
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8
src/conf/domain_conf.c
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@ -5815,28 +5815,28 @@ 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");