5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: David Ahern <dsahern@xxxxxxxxxx>
commit 748b82c23e25310fec54e1eff2cb63936f391b24 upstream.
The commit referenced in the Fixes tag no longer changes the
flow oif to the l3mdev ifindex. A xfrm use case was expecting
the flowi_oif to be the VRF if relevant and the change broke
that test. Update xfrm_bundle_create to pass oif if set and any
potential flowi_l3mdev if oif is not set.
Fixes: 40867d74c374 ("net: Add l3mdev index to flow struct and avoid oif reset for port devices")
Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
Signed-off-by: David Ahern <dsahern@xxxxxxxxxx>
Signed-off-by: Steffen Klassert <steffen.klassert@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/xfrm/xfrm_policy.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -2593,12 +2593,14 @@ static struct dst_entry *xfrm_bundle_cre
if (xfrm[i]->props.mode != XFRM_MODE_TRANSPORT) {
__u32 mark = 0;
+ int oif;
if (xfrm[i]->props.smark.v || xfrm[i]->props.smark.m)
mark = xfrm_smark_get(fl->flowi_mark, xfrm[i]);
family = xfrm[i]->props.family;
- dst = xfrm_dst_lookup(xfrm[i], tos, fl->flowi_oif,
+ oif = fl->flowi_oif ? : fl->flowi_l3mdev;
+ dst = xfrm_dst_lookup(xfrm[i], tos, oif,
&saddr, &daddr, family, mark);
err = PTR_ERR(dst);
if (IS_ERR(dst))
