From: Florian Westphal <fw@strlen.de>
To: <netdev@vger.kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>,
<netfilter-devel@vger.kernel.org>,
Pablo Neira Ayuso <pablo@netfilter.org>
Subject: [PATCH net 8/9] netfilter: nf_tables: GC transaction race with netns dismantle
Date: Wed, 16 Aug 2023 00:29:58 +0200 [thread overview]
Message-ID: <20230815223011.7019-9-fw@strlen.de> (raw)
In-Reply-To: <20230815223011.7019-1-fw@strlen.de>
From: Pablo Neira Ayuso <pablo@netfilter.org>
Use maybe_get_net() since GC workqueue might race with netns exit path.
Fixes: 5f68718b34a5 ("netfilter: nf_tables: GC transaction API to avoid race with control plane")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
---
net/netfilter/nf_tables_api.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 8ac4dd8be1a2..3e841e45f2c0 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -9481,9 +9481,14 @@ struct nft_trans_gc *nft_trans_gc_alloc(struct nft_set *set,
if (!trans)
return NULL;
+ trans->net = maybe_get_net(net);
+ if (!trans->net) {
+ kfree(trans);
+ return NULL;
+ }
+
refcount_inc(&set->refs);
trans->set = set;
- trans->net = get_net(net);
trans->seq = gc_seq;
return trans;
--
2.41.0
next prev parent reply other threads:[~2023-08-15 22:31 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-15 22:29 [PATCH net 0/9] netfilter fixes for net Florian Westphal
2023-08-15 22:29 ` [PATCH net 1/9] netfilter: nf_tables: fix false-positive lockdep splat Florian Westphal
2023-08-16 10:20 ` patchwork-bot+netdevbpf
2023-08-15 22:29 ` [PATCH net 2/9] netfilter: nf_tables: fix kdoc warnings after gc rework Florian Westphal
2023-08-15 22:29 ` [PATCH net 3/9] netfilter: nf_tables: deactivate catchall elements in next generation Florian Westphal
2023-08-15 22:29 ` [PATCH net 4/9] netfilter: nf_tables: don't fail inserts if duplicate has expired Florian Westphal
2023-08-15 22:29 ` [PATCH net 5/9] netfilter: set default timeout to 3 secs for sctp shutdown send and recv state Florian Westphal
2023-08-15 22:29 ` [PATCH net 6/9] ipvs: fix racy memcpy in proc_do_sync_threshold Florian Westphal
2023-08-15 22:29 ` [PATCH net 7/9] netfilter: nf_tables: fix GC transaction races with netns and netlink event exit path Florian Westphal
2023-08-15 22:29 ` Florian Westphal [this message]
2023-08-15 22:29 ` [PATCH net 9/9] netfilter: nft_dynset: disallow object maps Florian Westphal
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