From: Cong Wang <cwang@twopensource.com>
Date: Tue, 15 Apr 2014 23:25:35 +0000 (-0700)
Subject: ipv4, route: pass 0 instead of LOOPBACK_IFINDEX to fib_validate_source()
X-Git-Tag: omap-for-v3.16/soc-signed~41^2~11^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0d5edc68739f1c1e0519acbea1d3f0c1882a15d7;p=pandora-kernel.git

ipv4, route: pass 0 instead of LOOPBACK_IFINDEX to fib_validate_source()

In my special case, when a packet is redirected from veth0 to lo,
its skb->dev->ifindex would be LOOPBACK_IFINDEX. Meanwhile we
pass the hard-coded LOOPBACK_IFINDEX to fib_validate_source()
in ip_route_input_slow(). This would cause the following check
in fib_validate_source() fail:

            (dev->ifindex != oif || !IN_DEV_TX_REDIRECTS(idev))

when rp_filter is disabeld on loopback. As suggested by Julian,
the caller should pass 0 here so that we will not end up by
calling __fib_validate_source().

Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Julian Anastasov <ja@ssi.bg>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Cong Wang <cwang@twopensource.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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