From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Cc: davem@davemloft.net, netdev@vger.kernel.org
Subject: [PATCH 3/9] netfilter: nf_conncount: don't skip eviction when age is negative
Date: Sat, 29 Dec 2018 13:57:57 +0100 [thread overview]
Message-ID: <20181229125803.7415-4-pablo@netfilter.org> (raw)
In-Reply-To: <20181229125803.7415-1-pablo@netfilter.org>
From: Florian Westphal <fw@strlen.de>
age is signed integer, so result can be negative when the timestamps
have a large delta. In this case we want to discard the entry.
Instead of using age >= 2 || age < 0, just make it unsigned.
Fixes: b36e4523d4d56 ("netfilter: nf_conncount: fix garbage collection confirm race")
Reviewed-by: Shawn Bohrer <sbohrer@cloudflare.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
net/netfilter/nf_conncount.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/netfilter/nf_conncount.c b/net/netfilter/nf_conncount.c
index 3271a4e00500..8bb4ed85c262 100644
--- a/net/netfilter/nf_conncount.c
+++ b/net/netfilter/nf_conncount.c
@@ -155,7 +155,7 @@ find_or_evict(struct net *net, struct nf_conncount_list *list,
const struct nf_conntrack_tuple_hash *found;
unsigned long a, b;
int cpu = raw_smp_processor_id();
- __s32 age;
+ u32 age;
found = nf_conntrack_find_get(net, &conn->zone, &conn->tuple);
if (found)
--
2.11.0
next prev parent reply other threads:[~2018-12-29 12:57 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-29 12:57 [PATCH 0/9] Netfilter fixes for net Pablo Neira Ayuso
2018-12-29 12:57 ` [PATCH 1/9] netfilter: nf_tables: fix a missing check of nla_put_failure Pablo Neira Ayuso
2018-12-29 12:57 ` [PATCH 2/9] netfilter: nf_conncount: replace CONNCOUNT_LOCK_SLOTS with CONNCOUNT_SLOTS Pablo Neira Ayuso
2018-12-29 12:57 ` Pablo Neira Ayuso [this message]
2018-12-29 12:57 ` [PATCH 4/9] netfilter: nf_conncount: split gc in two phases Pablo Neira Ayuso
2018-12-29 12:57 ` [PATCH 5/9] netfilter: nf_conncount: restart search when nodes have been erased Pablo Neira Ayuso
2018-12-29 12:58 ` [PATCH 6/9] netfilter: nf_conncount: merge lookup and add functions Pablo Neira Ayuso
2018-12-29 12:58 ` [PATCH 7/9] netfilter: nf_conncount: move all list iterations under spinlock Pablo Neira Ayuso
2018-12-29 12:58 ` [PATCH 8/9] netfilter: nf_conncount: speculative garbage collection on empty lists Pablo Neira Ayuso
2018-12-29 12:58 ` [PATCH 9/9] netfilter: nf_conncount: fix argument order to find_next_bit Pablo Neira Ayuso
2018-12-29 22:33 ` [PATCH 0/9] Netfilter fixes for net David Miller
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