From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Cc: gregkh@linuxfoundation.org, sashal@kernel.org, stable@vger.kernel.org
Subject: [PATCH -stable,5.4 13/26] netfilter: nf_tables: GC transaction race with netns dismantle
Date: Tue, 21 Nov 2023 13:13:20 +0100 [thread overview]
Message-ID: <20231121121333.294238-14-pablo@netfilter.org> (raw)
In-Reply-To: <20231121121333.294238-1-pablo@netfilter.org>
commit 02c6c24402bf1c1e986899c14ba22a10b510916b upstream.
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 cd4974674568..e76ceefd8e01 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -7052,9 +7052,14 @@ 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;
--
2.30.2
next prev parent reply other threads:[~2023-11-21 12:13 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-21 12:13 [PATCH -stable,5.4 00/26] Netfilter stable fixes for 5.4 Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 01/26] netfilter: nf_tables: pass context to nft_set_destroy() Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 02/26] netfilter: nftables: rename set element data activation/deactivation functions Pablo Neira Ayuso
2023-11-21 16:19 ` [PATCH 2/26] " kernel test robot
2023-11-21 12:13 ` [PATCH -stable,5.4 03/26] netfilter: nf_tables: drop map element references from preparation phase Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 04/26] netfilter: nft_set_rbtree: Switch to node list walk for overlap detection Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 05/26] netfilter: nft_set_rbtree: fix null deref on element insertion Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 06/26] netfilter: nft_set_rbtree: fix overlap expiration walk Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 07/26] netfilter: nf_tables: don't skip expired elements during walk Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 08/26] netfilter: nf_tables: GC transaction API to avoid race with control plane Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 09/26] netfilter: nf_tables: adapt set backend to use GC transaction API Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 10/26] netfilter: nft_set_hash: mark set element as dead when deleting from packet path Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 11/26] netfilter: nf_tables: remove busy mark and gc batch API Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 12/26] netfilter: nf_tables: fix GC transaction races with netns and netlink event exit path Pablo Neira Ayuso
2023-11-21 12:13 ` Pablo Neira Ayuso [this message]
2023-11-21 12:13 ` [PATCH -stable,5.4 14/26] netfilter: nf_tables: GC transaction race with abort path Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 15/26] netfilter: nf_tables: use correct lock to protect gc_list Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 16/26] netfilter: nf_tables: defer gc run if previous batch is still pending Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 17/26] netfilter: nft_set_rbtree: skip sync GC for new elements in this transaction Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 18/26] netfilter: nft_set_rbtree: use read spinlock to avoid datapath contention Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 19/26] netfilter: nft_set_hash: try later when GC hits EAGAIN on iteration Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 20/26] netfilter: nf_tables: fix memleak when more than 255 elements expired Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 21/26] netfilter: nf_tables: unregister flowtable hooks on netns exit Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 22/26] netfilter: nf_tables: double hook unregistration in netns path Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 23/26] netfilter: nftables: update table flags from the commit phase Pablo Neira Ayuso
2023-11-22 16:21 ` Sasha Levin
2023-11-22 17:32 ` Pablo Neira Ayuso
2023-11-23 10:36 ` Pablo Neira Ayuso
2023-11-24 16:23 ` Greg KH
2023-11-21 12:13 ` [PATCH -stable,5.4 24/26] netfilter: nf_tables: fix table flag updates Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 25/26] netfilter: nf_tables: disable toggling dormant table state more than once Pablo Neira Ayuso
2023-11-21 12:13 ` [PATCH -stable,5.4 26/26] netfilter: nf_tables: bogus EBUSY when deleting flowtable after flush (for 5.4) Pablo Neira Ayuso
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