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Fix skb luadata leak on netfilter hook registration failure #339

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Fix skb luadata leak on netfilter hook registration failure #339

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8 changes: 8 additions & 0 deletions lib/luanetfilter.c
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Original file line number Diff line number Diff line change
Expand Up @@ -198,10 +198,18 @@ static const luaL_Reg luanetfilter_lib[] = {
static void luanetfilter_release(void *private)
{
luanetfilter_t *nf = (luanetfilter_t *)private;
if (nf->skb) {
luadata_close(nf->skb);
nf->skb = NULL;
}
if (!nf->runtime)
return;

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 13, 0))
nf_unregister_net_hook(&init_net, &nf->nfops);
#else
nf_unregister_hook(&nf->nfops);
#endif
lunatik_putobject(nf->runtime);
nf->runtime = NULL;
}
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