linux-kernel - [PATCH 3.19.y-ckt 122/130] netfilter: nf_conntrack: Support expectations in different zones

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Message-Id: <1440713521-5906-123-git-send-email-kamal@canonical.com>
Date:	Thu, 27 Aug 2015 15:11:53 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Joe Stringer <joestringer@...ira.com>,
	Pablo Neira Ayuso <pablo@...filter.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.19.y-ckt 122/130] netfilter: nf_conntrack: Support expectations in different zones

3.19.8-ckt6 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Joe Stringer <joestringer@...ira.com>

commit 4b31814d20cbe5cd4ccf18089751e77a04afe4f2 upstream.

When zones were originally introduced, the expectation functions were
all extended to perform lookup using the zone. However, insertion was
not modified to check the zone. This means that two expectations which
are intended to apply for different connections that have the same tuple
but exist in different zones cannot both be tracked.

Fixes: 5d0aa2ccd4 (netfilter: nf_conntrack: add support for "conntrack zones")
Signed-off-by: Joe Stringer <joestringer@...ira.com>
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 net/netfilter/nf_conntrack_expect.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/netfilter/nf_conntrack_expect.c b/net/netfilter/nf_conntrack_expect.c
index 91a1837..26af451 100644
--- a/net/netfilter/nf_conntrack_expect.c
+++ b/net/netfilter/nf_conntrack_expect.c
@@ -219,7 +219,8 @@ static inline int expect_clash(const struct nf_conntrack_expect *a,
 			a->mask.src.u3.all[count] & b->mask.src.u3.all[count];
 	}
 
-	return nf_ct_tuple_mask_cmp(&a->tuple, &b->tuple, &intersect_mask);
+	return nf_ct_tuple_mask_cmp(&a->tuple, &b->tuple, &intersect_mask) &&
+	       nf_ct_zone(a->master) == nf_ct_zone(b->master);
 }
 
 static inline int expect_matches(const struct nf_conntrack_expect *a,
-- 
1.9.1

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