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| author | Florian Westphal <fw@strlen.de> | 2019-01-02 23:42:04 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-09 19:14:51 +0300 |
| commit | 052ccb86b31c184d8ed7d76d1c06d7ca0b8fd32e (patch) | |
| tree | d959cee3c67c53429aef7c64a4b3fccd68d311f2 /net | |
| parent | 75af3d78168e654a5cd8bbc4c774f97be836165f (diff) | |
| download | linux-052ccb86b31c184d8ed7d76d1c06d7ca0b8fd32e.tar.xz | |
netfilter: nf_conncount: don't skip eviction when age is negative
commit 4cd273bb91b3001f623f516ec726c49754571b1a upstream.
(not in Linus's tree now, but in nf.git + linux-next.git already.)
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>
[mfo: backport: use older file name, nf_conncount.c -> xt_connlimit.c]
Signed-off-by: Mauricio Faria de Oliveira <mfo@canonical.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/xt_connlimit.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/netfilter/xt_connlimit.c b/net/netfilter/xt_connlimit.c index 913b86ef3a8d..b1646c24a632 100644 --- a/net/netfilter/xt_connlimit.c +++ b/net/netfilter/xt_connlimit.c @@ -141,7 +141,7 @@ find_or_evict(struct net *net, struct xt_connlimit_conn *conn) 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) |