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virDomainDiskDefGeometryParse: Use virXMLProp*

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This strictens the parser to disallow negative values (interpreted as
`UINT_MAX + value + 1`) for attributes `cyls`, `heads` and `secs`.
Allowing negative numbers to be interpreted this way makes no sense for
these attributes.

Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
This commit is contained in:
Tim Wiederhake 2021-05-18 17:04:46 +02:00 committed by Laine Stump
parent ef18ca1c06
commit 1b1cb2934e
1 changed files with 12 additions and 36 deletions
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48
src/conf/domain_conf.c
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@ -8815,45 +8815,21 @@ static int
virDomainDiskDefGeometryParse(virDomainDiskDef *def,
xmlNodePtr cur)
{
g_autofree char *tmp = NULL;
if (virXMLPropUInt(cur, "cyls", 10, VIR_XML_PROP_NONE,
&def->geometry.cylinders) < 0)
return -1;
if ((tmp = virXMLPropString(cur, "cyls"))) {
if (virStrToLong_ui(tmp, NULL, 10, &def->geometry.cylinders) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("invalid geometry settings (cyls)"));
return -1;
}
VIR_FREE(tmp);
}
if (virXMLPropUInt(cur, "heads", 10, VIR_XML_PROP_NONE,
&def->geometry.heads) < 0)
return -1;
if ((tmp = virXMLPropString(cur, "heads"))) {
if (virStrToLong_ui(tmp, NULL, 10, &def->geometry.heads) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("invalid geometry settings (heads)"));
return -1;
}
VIR_FREE(tmp);
}
if (virXMLPropUInt(cur, "secs", 10, VIR_XML_PROP_NONE,
&def->geometry.sectors) < 0)
return -1;
if ((tmp = virXMLPropString(cur, "secs"))) {
if (virStrToLong_ui(tmp, NULL, 10, &def->geometry.sectors) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("invalid geometry settings (secs)"));
return -1;
}
VIR_FREE(tmp);
}
if ((tmp = virXMLPropString(cur, "trans"))) {
int value;
if ((value = virDomainDiskGeometryTransTypeFromString(tmp)) <= 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("invalid translation value '%s'"),
tmp);
return -1;
}
def->geometry.trans = value;
}
if (virXMLPropEnum(cur, "trans", virDomainDiskGeometryTransTypeFromString,
VIR_XML_PROP_NONZERO, &def->geometry.trans) < 0)
return -1;
return 0;
}