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netfilter: nf_tables: add missing ->release_ops() in error path of newrule() 

->release_ops() callback releases resources and this is used in error path.
If nf_tables_newrule() fails after ->select_ops(), it should release
resources. but it can not call ->destroy() because that should be called
after ->init().
At this point, ->release_ops() should be used for releasing resources.

Test commands:
   modprobe -rv xt_tcpudp
   iptables-nft -I INPUT -m tcp   <-- error command
   lsmod

Result:
   Module                  Size  Used by
   xt_tcpudp              20480  2      <-- it should be 0

Fixes: b8e2040063 ("netfilter: nft_compat: use .release_ops and remove list of extension")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
hifive-unleashed-5.1
Taehee Yoo 2019-03-19 13:22:41 +09:00 committed by Pablo Neira Ayuso
parent 7c9abe12b3
commit b25a31bf0c
1 changed files with 4 additions and 1 deletions
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5
net/netfilter/nf_tables_api.c
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@ -2806,8 +2806,11 @@ err2:
nf_tables_rule_release(&ctx, rule);
err1:
for (i = 0; i < n; i++) {
if (info[i].ops != NULL)
if (info[i].ops) {
module_put(info[i].ops->type->owner);
if (info[i].ops->type->release_ops)
info[i].ops->type->release_ops(info[i].ops);
}
}
kvfree(info);
return err;