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Message-Id: <20210329075633.914203344@linuxfoundation.org>
Date: Mon, 29 Mar 2021 09:57:53 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, wenxu <wenxu@...oud.cn>,
Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 142/221] net/sched: cls_flower: fix only mask bit check in the validate_ct_state
From: wenxu <wenxu@...oud.cn>
[ Upstream commit afa536d8405a9ca36e45ba035554afbb8da27b82 ]
The ct_state validate should not only check the mask bit and also
check mask_bit & key_bit..
For the +new+est case example, The 'new' and 'est' bits should be
set in both state_mask and state flags. Or the -new-est case also
will be reject by kernel.
When Openvswitch with two flows
ct_state=+trk+new,action=commit,forward
ct_state=+trk+est,action=forward
A packet go through the kernel and the contrack state is invalid,
The ct_state will be +trk-inv. Upcall to the ovs-vswitchd, the
finally dp action will be drop with -new-est+trk.
Fixes: 1bcc51ac0731 ("net/sched: cls_flower: Reject invalid ct_state flags rules")
Fixes: 3aed8b63336c ("net/sched: cls_flower: validate ct_state for invalid and reply flags")
Signed-off-by: wenxu <wenxu@...oud.cn>
Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
net/sched/cls_flower.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index 46c1b3e9f66a..14316ba9b3b3 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -1432,7 +1432,7 @@ static int fl_set_key_ct(struct nlattr **tb,
&mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK,
sizeof(key->ct_state));
- err = fl_validate_ct_state(mask->ct_state,
+ err = fl_validate_ct_state(key->ct_state & mask->ct_state,
tb[TCA_FLOWER_KEY_CT_STATE_MASK],
extack);
if (err)
--
2.30.1
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