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virDomainDeviceSpaprVioAddressParseXML: Use virXMLProp*

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This strictens the parser to disallow negative values (interpreted as
`ULLONG_MAX + value + 1`) for attribute `reg`. Allowing negative
numbers to be interpreted this way makes no sense for this attribute, as it
refers to a 32 bit address space.

Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Tim Wiederhake 2021-05-19 16:10:12 +02:00 committed by Michal Privoznik
parent 99037fb2b9
commit 3d5591aede
1 changed files with 6 additions and 8 deletions
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14
src/conf/device_conf.c
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@ -417,19 +417,17 @@ int
virDomainDeviceSpaprVioAddressParseXML(xmlNodePtr node,
virDomainDeviceSpaprVioAddress *addr)
{
g_autofree char *reg = virXMLPropString(node, "reg");
int reg;
memset(addr, 0, sizeof(*addr));
if (reg) {
if (virStrToLong_ull(reg, NULL, 16, &addr->reg) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Cannot parse <address> 'reg' attribute"));
return -1;
}
if ((reg = virXMLPropULongLong(node, "reg", 16, VIR_XML_PROP_NONE,
&addr->reg)) < 0)
return -1;
if (reg != 0)
addr->has_reg = true;
}
return 0;
}