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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Hendrik Donner <hd@os-cillation.de>,
        David Ahern <dsahern@kernel.org>,
        "David S. Miller" <davem@davemloft.net>
Subject: [PATCH 4.9 02/65] ipv4: Fix table id reference in fib_sync_down_addr
Date:   Mon, 11 Nov 2019 19:28:02 +0100
Message-Id: <20191111181333.187209221@linuxfoundation.org>
In-Reply-To: <20191111181331.917659011@linuxfoundation.org>
References: <20191111181331.917659011@linuxfoundation.org>
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From: David Ahern <dsahern@kernel.org>

[ Upstream commit e0a312629fefa943534fc46f7bfbe6de3fdaf463 ]

Hendrik reported routes in the main table using source address are not
removed when the address is removed. The problem is that fib_sync_down_addr
does not account for devices in the default VRF which are associated
with the main table. Fix by updating the table id reference.

Fixes: 5a56a0b3a45d ("net: Don't delete routes in different VRFs")
Reported-by: Hendrik Donner <hd@os-cillation.de>
Signed-off-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/ipv4/fib_semantics.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -1358,8 +1358,8 @@ int fib_sync_down_addr(struct net_device
 	int ret = 0;
 	unsigned int hash = fib_laddr_hashfn(local);
 	struct hlist_head *head = &fib_info_laddrhash[hash];
+	int tb_id = l3mdev_fib_table(dev) ? : RT_TABLE_MAIN;
 	struct net *net = dev_net(dev);
-	int tb_id = l3mdev_fib_table(dev);
 	struct fib_info *fi;
 
 	if (!fib_info_laddrhash || local == 0)