netdev - [PATCH net 4/9] netfilter: nft_set_pipapo: stop GC iteration if GC transaction allocation fails

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Message-Id: <20230913215800.107269-5-pablo@netfilter.org>
Date: Wed, 13 Sep 2023 23:57:55 +0200
From: Pablo Neira Ayuso <pablo@...filter.org>
To: netfilter-devel@...r.kernel.org
Cc: davem@...emloft.net,
	netdev@...r.kernel.org,
	kuba@...nel.org,
	pabeni@...hat.com,
	edumazet@...gle.com
Subject: [PATCH net 4/9] netfilter: nft_set_pipapo: stop GC iteration if GC transaction allocation fails

nft_trans_gc_queue_sync() enqueues the GC transaction and it allocates a
new one. If this allocation fails, then stop this GC sync run and retry
later.

Fixes: 5f68718b34a5 ("netfilter: nf_tables: GC transaction API to avoid race with control plane")
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
---
 net/netfilter/nft_set_pipapo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netfilter/nft_set_pipapo.c b/net/netfilter/nft_set_pipapo.c
index 10b89ac74476..c0dcc40de358 100644
--- a/net/netfilter/nft_set_pipapo.c
+++ b/net/netfilter/nft_set_pipapo.c
@@ -1596,7 +1596,7 @@ static void pipapo_gc(const struct nft_set *_set, struct nft_pipapo_match *m)
 
 			gc = nft_trans_gc_queue_sync(gc, GFP_ATOMIC);
 			if (!gc)
-				break;
+				return;
 
 			nft_pipapo_gc_deactivate(net, set, e);
 			pipapo_drop(m, rulemap);
-- 
2.30.2