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network: Remove memory leak caused by wrong initialization

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This commit fix a wrong variable initialization. There is a variable
called `new_lease` which is being initialized with the content of
parameter `lease`. To avoid memory leak, the proper way is initialize
with NULL first. This wrong statement was added by commit 97a0aa24.
There are some other improvements also.

Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Julio Faracco 2020-04-25 13:35:37 -03:00 committed by Michal Privoznik
parent 4e7f8ba0f3
commit 4aa1ab0e79
2 changed files with 21 additions and 25 deletions
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38
src/conf/network_conf.c
View File

@ -412,38 +412,32 @@ static int
virNetworkDHCPLeaseTimeDefParseXML(virNetworkDHCPLeaseTimeDefPtr *lease,
xmlNodePtr node)
{
virNetworkDHCPLeaseTimeDefPtr new_lease = *lease;
g_autofree char *expiry = NULL;
g_autofree char *unit = NULL;
int unitInt;
virNetworkDHCPLeaseTimeDefPtr new_lease = NULL;
g_autofree char *expirystr = NULL;
g_autofree char *unitstr = NULL;
unsigned long expiry;
int unit = VIR_NETWORK_DHCP_LEASETIME_UNIT_MINUTES;
if (!(expiry = virXMLPropString(node, "expiry")))
if (!(expirystr = virXMLPropString(node, "expiry")))
return 0;
if (VIR_ALLOC(new_lease) < 0)
return -1;
new_lease->unit = VIR_NETWORK_DHCP_LEASETIME_UNIT_MINUTES;
if (virStrToLong_ul(expiry, NULL, 10, &new_lease->expiry) < 0)
if (virStrToLong_ul(expirystr, NULL, 10, &expiry) < 0)
return -1;
if ((unit = virXMLPropString(node, "unit"))) {
if ((unitInt = virNetworkDHCPLeaseTimeUnitTypeFromString(unit)) < 0) {
if ((unitstr = virXMLPropString(node, "unit"))) {
if ((unit = virNetworkDHCPLeaseTimeUnitTypeFromString(unitstr)) < 0) {
virReportError(VIR_ERR_XML_ERROR,
_("Invalid unit: %s"), unit);
_("Invalid unit: %s"), unitstr);
return -1;
}
new_lease->unit = unitInt;
}
/* infinite */
if (new_lease->expiry > 0) {
if (expiry > 0) {
/* This boundary check is related to dnsmasq man page settings:
* "The minimum lease time is two minutes." */
if ((new_lease->unit == VIR_NETWORK_DHCP_LEASETIME_UNIT_SECONDS &&
new_lease->expiry < 120) ||
(new_lease->unit == VIR_NETWORK_DHCP_LEASETIME_UNIT_MINUTES &&
new_lease->expiry < 2)) {
if ((unit == VIR_NETWORK_DHCP_LEASETIME_UNIT_SECONDS && expiry < 120) ||
(unit == VIR_NETWORK_DHCP_LEASETIME_UNIT_MINUTES && expiry < 2)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("The minimum lease time should be greater "
"than 2 minutes"));
@ -451,6 +445,12 @@ virNetworkDHCPLeaseTimeDefParseXML(virNetworkDHCPLeaseTimeDefPtr *lease,
}
}
if (VIR_ALLOC(new_lease) < 0)
return -1;
new_lease->expiry = expiry;
new_lease->unit = unit;
*lease = new_lease;
return 0;

8
src/network/bridge_driver.c
View File

@ -969,7 +969,6 @@ static int networkConnectIsAlive(virConnectPtr conn G_GNUC_UNUSED)
static char *
networkBuildDnsmasqLeaseTime(virNetworkDHCPLeaseTimeDefPtr lease)
{
char *leasetime = NULL;
const char *unit;
g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
@ -984,9 +983,7 @@ networkBuildDnsmasqLeaseTime(virNetworkDHCPLeaseTimeDefPtr lease)
virBufferAsprintf(&buf, "%lu%c", lease->expiry, unit[0]);
}
leasetime = virBufferContentAndReset(&buf);
return leasetime;
return virBufferContentAndReset(&buf);
}
@ -999,14 +996,13 @@ networkBuildDnsmasqDhcpHostsList(dnsmasqContext *dctx,
{
size_t i;
bool ipv6 = false;
g_autofree char *leasetime = NULL;
if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET6))
ipv6 = true;
for (i = 0; i < ipdef->nhosts; i++) {
virNetworkDHCPHostDefPtr host = &(ipdef->hosts[i]);
g_autofree char *leasetime = networkBuildDnsmasqLeaseTime(host->lease);
leasetime = networkBuildDnsmasqLeaseTime(host->lease);
if (VIR_SOCKET_ADDR_VALID(&host->ip))
if (dnsmasqAddDhcpHost(dctx, host->mac, &host->ip,
host->name, host->id, leasetime,