linux-kernel - [PATCH 5.15 183/277] ipv6: Fix stats accounting in ip6_pkt

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Message-Id: <20220412062947.331978667@linuxfoundation.org>
Date:   Tue, 12 Apr 2022 08:29:46 +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, "Pudak, Filip" <Filip.Pudak@...driver.com>,
        "Xiao, Jiguang" <Jiguang.Xiao@...driver.com>,
        David Ahern <dsahern@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Sasha Levin <sashal@...nel.org>, Pudak@...r.kernel.org,
        Xiao@...r.kernel.org
Subject: [PATCH 5.15 183/277] ipv6: Fix stats accounting in ip6_pkt_drop

From: David Ahern <dsahern@...nel.org>

[ Upstream commit 1158f79f82d437093aeed87d57df0548bdd68146 ]

VRF devices are the loopbacks for VRFs, and a loopback can not be
assigned to a VRF. Accordingly, the condition in ip6_pkt_drop should
be '||' not '&&'.

Fixes: 1d3fd8a10bed ("vrf: Use orig netdev to count Ip6InNoRoutes and a fresh route lookup when sending dest unreach")
Reported-by: Pudak, Filip <Filip.Pudak@...driver.com>
Reported-by: Xiao, Jiguang <Jiguang.Xiao@...driver.com>
Signed-off-by: David Ahern <dsahern@...nel.org>
Link: https://lore.kernel.org/r/20220404150908.2937-1-dsahern@kernel.org
Signed-off-by: Paolo Abeni <pabeni@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/ipv6/route.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index e0766bdf20e7..6b269595efaa 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -4509,7 +4509,7 @@ static int ip6_pkt_drop(struct sk_buff *skb, u8 code, int ipstats_mib_noroutes)
 	struct inet6_dev *idev;
 	int type;
 
-	if (netif_is_l3_master(skb->dev) &&
+	if (netif_is_l3_master(skb->dev) ||
 	    dst->dev == net->loopback_dev)
 		idev = __in6_dev_get_safely(dev_get_by_index_rcu(net, IP6CB(skb)->iif));
 	else
-- 
2.35.1