From: Pablo Neira Ayuso pablo@netfilter.org
[ Upstream commit 02c6c24402bf1c1e986899c14ba22a10b510916b ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- 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 dcf3ed3d5af9d..b280b151a9e98 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -9495,9 +9495,14 @@ 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;