linux-kernel - [PATCH 3.16 084/132] ipv4: Use return value of inet_iif() for __raw_v4

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Message-ID: <lsq.1568989415.168503847@decadent.org.uk>
Date:   Fri, 20 Sep 2019 15:23:35 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "David Ahern" <dsahern@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        "Stephen Suryaputra" <ssuryaextr@...il.com>
Subject: [PATCH 3.16 084/132] ipv4: Use return value of inet_iif() for
 __raw_v4_lookup in the while loop

3.16.74-rc1 review patch.  If anyone has any objections, please let me know.

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

From: Stephen Suryaputra <ssuryaextr@...il.com>

commit 38c73529de13e1e10914de7030b659a2f8b01c3b upstream.

In commit 19e4e768064a8 ("ipv4: Fix raw socket lookup for local
traffic"), the dif argument to __raw_v4_lookup() is coming from the
returned value of inet_iif() but the change was done only for the first
lookup. Subsequent lookups in the while loop still use skb->dev->ifIndex.

Fixes: 19e4e768064a8 ("ipv4: Fix raw socket lookup for local traffic")
Signed-off-by: Stephen Suryaputra <ssuryaextr@...il.com>
Reviewed-by: David Ahern <dsahern@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 net/ipv4/raw.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -193,7 +193,7 @@ static int raw_v4_input(struct sk_buff *
 		}
 		sk = __raw_v4_lookup(net, sk_next(sk), iph->protocol,
 				     iph->saddr, iph->daddr,
-				     skb->dev->ifindex);
+				     dif);
 	}
 out:
 	read_unlock(&raw_v4_hashinfo.lock);