On Fri, Nov 29, 2013 at 08:31:52PM +0530, Nehal J Wani wrote:
> 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;
> + }
> }
I think it is preferrable to use virNWFilterEntryFree() here.
> if (entry->rule || entry->include) {
Just following this line there is another call to VIR_FREE(entry)
which leaks entry->rule and entry->include. This should be made
to call virNWFilterEntryFree too
Daniel
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