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xfrm: Only add l3mdev oif to dst lookups

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Subash reported that commit 42a7b32b73 ("xfrm: Add oif to dst lookups")
broke a wifi use case that uses fib rules and xfrms. The intent of
42a7b32b73 was driven by VRFs with IPsec. As a compromise relax the
use of oif in xfrm lookups to L3 master devices only (ie., oif is either
an L3 master device or is enslaved to a master device).

Fixes: 42a7b32b73 ("xfrm: Add oif to dst lookups")
Reported-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
David Ahern
2016-08-14 19:52:56 -07:00
committed by Steffen Klassert
parent 1625f45299
commit 11d7a0bb95
2 changed files with 2 additions and 2 deletions
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2
net/ipv4/xfrm4_policy.c
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@@ -29,7 +29,7 @@ static struct dst_entry *__xfrm4_dst_lookup(struct net *net, struct flowi4 *fl4,
memset(fl4, 0, sizeof(*fl4));
fl4->daddr = daddr->a4;
fl4->flowi4_tos = tos;
fl4->flowi4_oif = oif;
fl4->flowi4_oif = l3mdev_master_ifindex_by_index(net, oif);
if (saddr)
fl4->saddr = saddr->a4;