[libvirt] [PATCH] Fix memory leak in virNWFilterDefParseXML()

While running nwfilterxml2xmltest, it was found that valgrind pointed out the following error... ==7466== 16 bytes in 1 blocks are definitely lost in loss record 26 of 90 ==7466== at 0x4A06B6F: calloc (vg_replace_malloc.c:593) ==7466== by 0x4C651AD: virAlloc (viralloc.c:142) ==7466== by 0x4D0450D: virNWFilterDefParseNode (nwfilter_conf.c:2575) ==7466== by 0x4D05D84: virNWFilterDefParse (nwfilter_conf.c:2647) ==7466== by 0x401FDE: testCompareXMLToXMLHelper (nwfilterxml2xmltest.c:39) ==7466== by 0x402DE1: virtTestRun (testutils.c:138) ==7466== by 0x4018E9: mymain (nwfilterxml2xmltest.c:111) ==7466== by 0x403482: virtTestMain (testutils.c:593) ==7466== by 0x341F421A04: (below main) (libc-start.c:225) ...21 times, which are related to 21 tests in nwfilterxml2xmltest.c which sent EXPECT_WARN = false. There were two scenarios in virNWFilterDefParseXML(), when the variable 'entry' was malloc'ed, but not freed. --- src/conf/nwfilter_conf.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/src/conf/nwfilter_conf.c b/src/conf/nwfilter_conf.c index 793cb0e..ee26a62 100644 --- a/src/conf/nwfilter_conf.c +++ b/src/conf/nwfilter_conf.c @@ -2576,11 +2576,15 @@ virNWFilterDefParseXML(xmlXPathContextPtr ctxt) { goto cleanup; if (xmlStrEqual(curr->name, BAD_CAST "rule")) { - if (!(entry->rule = virNWFilterRuleParse(curr))) + if (!(entry->rule = virNWFilterRuleParse(curr))) { + VIR_FREE(entry); goto cleanup; + } } else if (xmlStrEqual(curr->name, BAD_CAST "filterref")) { - if (!(entry->include = virNWFilterIncludeParse(curr))) + if (!(entry->include = virNWFilterIncludeParse(curr))) { + VIR_FREE(entry); goto cleanup; + } } if (entry->rule || entry->include) { -- 1.8.1.4