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netfilter: nf_tables: use rcu chain hook list iterator from netlink dump path

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BugLink: https://bugs.launchpad.net/bugs/2089340

[ Upstream commit 4ffcf5ca81c3b83180473eb0d3c010a1a7c6c4de ]

Lockless iteration over hook list is possible from netlink dump path,
use rcu variant to iterate over the hook list as is done with flowtable
hooks.

Fixes: b9703ed44f ("netfilter: nf_tables: support for adding new devices to an existing netdev chain")
Reported-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Portia Stephens <portia.stephens@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Pablo Neira Ayuso
2024-09-17 23:07:46 +02:00
committed by Mehmet Basaran
parent 9549faca97
commit c8d733abe1
1 changed files with 1 additions and 1 deletions
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net/netfilter/nf_tables_api.c
+1 -1
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@@ -1783,7 +1783,7 @@ static int nft_dump_basechain_hook(struct sk_buff *skb, int family,
if (!hook_list)
hook_list = &basechain->hook_list;
list_for_each_entry(hook, hook_list, list) {
list_for_each_entry_rcu(hook, hook_list, list) {
if (!first)
first = hook;