xfrm: fix policy lookup for ipv6 gre packets

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On egress side, xfrm lookup is called from __gre6_xmit() with the
fl6_gre_key field not initialized leading to policies selectors check
failure. Consequently, gre packets are sent without encryption.

On ingress side, INET6_PROTO_NOPOLICY was set, thus packets were not
checked against xfrm policies. Like for egress side, fl6_gre_key should be
correctly set, this is now done in decode_session6().

Fixes: c12b395a46 ("gre: Support GRE over IPv6")
Cc: stable@vger.kernel.org
Signed-off-by: Ghalem Boudour <ghalem.boudour@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

...

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Ghalem Boudour 2021-11-19 18:20:16 +01:00 • committed by Steffen Klassert

parent 03a000bfd7

commit bcf141b2eb

2 changed files with 25 additions and 1 deletions

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5

net/ipv6/ip6_gre.c

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21

net/xfrm/xfrm_policy.c

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