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nwfilter: fix leaking of filter parameters upon error

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The filter parameters were not correctly free'd when an error hits while
adding to the hash table.

Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2018-04-26 17:52:13 +01:00
parent 94d31e7c0e
commit 1c425d735d
2 changed files with 7 additions and 17 deletions
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22
src/nwfilter/nwfilter_gentech_driver.c
View File

@ -143,19 +143,20 @@ virNWFilterRuleInstFree(virNWFilterRuleInstPtr inst)
*/
static int
virNWFilterVarHashmapAddStdValues(virHashTablePtr table,
char *macaddr,
const char *macaddr,
const virNWFilterVarValue *ipaddr)
{
virNWFilterVarValue *val;
if (macaddr) {
val = virNWFilterVarValueCreateSimple(macaddr);
val = virNWFilterVarValueCreateSimpleCopyValue(macaddr);
if (!val)
return -1;
if (virHashAddEntry(table,
NWFILTER_STD_VAR_MAC,
val) < 0) {
virNWFilterVarValueFree(val);
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Could not add variable 'MAC' to hashmap"));
return -1;
@ -170,6 +171,7 @@ virNWFilterVarHashmapAddStdValues(virHashTablePtr table,
if (virHashAddEntry(table,
NWFILTER_STD_VAR_IP,
val) < 0) {
virNWFilterVarValueFree(val);
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Could not add variable 'IP' to hashmap"));
return -1;
@ -192,7 +194,7 @@ virNWFilterVarHashmapAddStdValues(virHashTablePtr table,
* Returns pointer to hashmap, NULL if an error occurred.
*/
virHashTablePtr
virNWFilterCreateVarHashmap(char *macaddr,
virNWFilterCreateVarHashmap(const char *macaddr,
const virNWFilterVarValue *ipaddr)
{
virHashTablePtr table = virNWFilterHashTableCreate(0);
@ -767,9 +769,7 @@ virNWFilterInstantiateFilterUpdate(virNWFilterDriverStatePtr driver,
virNWFilterDefPtr filter;
virNWFilterDefPtr newFilter;
char vmmacaddr[VIR_MAC_STRING_BUFLEN] = {0};
char *str_macaddr = NULL;
virNWFilterVarValuePtr ipaddr;
char *str_ipaddr = NULL;
techdriver = virNWFilterTechDriverForName(drvname);
@ -788,22 +788,15 @@ virNWFilterInstantiateFilterUpdate(virNWFilterDriverStatePtr driver,
return -1;
virMacAddrFormat(macaddr, vmmacaddr);
if (VIR_STRDUP(str_macaddr, vmmacaddr) < 0) {
rc = -1;
goto err_exit;
}
ipaddr = virNWFilterIPAddrMapGetIPAddr(ifname);
vars1 = virNWFilterCreateVarHashmap(str_macaddr, ipaddr);
vars1 = virNWFilterCreateVarHashmap(vmmacaddr, ipaddr);
if (!vars1) {
rc = -1;
goto err_exit;
}
str_macaddr = NULL;
str_ipaddr = NULL;
vars = virNWFilterCreateVarsFrom(vars1,
filterparams);
if (!vars) {
@ -840,9 +833,6 @@ virNWFilterInstantiateFilterUpdate(virNWFilterDriverStatePtr driver,
err_exit:
virNWFilterObjUnlock(obj);
VIR_FREE(str_ipaddr);
VIR_FREE(str_macaddr);
return rc;
}

2
src/nwfilter/nwfilter_gentech_driver.h
View File

@ -57,7 +57,7 @@ int virNWFilterInstantiateFilterLate(virNWFilterDriverStatePtr driver,
int virNWFilterTeardownFilter(const virDomainNetDef *net);
virHashTablePtr virNWFilterCreateVarHashmap(char *macaddr,
virHashTablePtr virNWFilterCreateVarHashmap(const char *macaddr,
const virNWFilterVarValue *value);
int virNWFilterDomainFWUpdateCB(virDomainObjPtr vm,