diff options
author | Xin Long <lucien.xin@gmail.com> | 2020-04-10 17:06:01 +0800 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-03 08:16:44 +0200 |
commit | 918e01babefc91d50c15b25c83421923d86ea65c (patch) | |
tree | f458714e358cb6e74e66a589193d04ad17b31449 /net | |
parent | 724fb3b38b11c919d60a6be8cd5ae0c3d82878c6 (diff) |
xfrm: allow to accept packets with ipv6 NEXTHDR_HOP in xfrm_input
commit afcaf61be9d1dbdee5ec186d1dcc67b6b692180f upstream.
For beet mode, when it's ipv6 inner address with nexthdrs set,
the packet format might be:
----------------------------------------------------
| outer | | dest | | | ESP | ESP |
| IP hdr | ESP | opts.| TCP | Data | Trailer | ICV |
----------------------------------------------------
The nexthdr from ESP could be NEXTHDR_HOP(0), so it should
continue processing the packet when nexthdr returns 0 in
xfrm_input(). Otherwise, when ipv6 nexthdr is set, the
packet will be dropped.
I don't see any error cases that nexthdr may return 0. So
fix it by removing the check for nexthdr == 0.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
-rw-r--r-- | net/xfrm/xfrm_input.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c index 6e3f0254d8a1..1e87639f2c27 100644 --- a/net/xfrm/xfrm_input.c +++ b/net/xfrm/xfrm_input.c @@ -302,7 +302,7 @@ resume: dev_put(skb->dev); spin_lock(&x->lock); - if (nexthdr <= 0) { + if (nexthdr < 0) { if (nexthdr == -EBADMSG) { xfrm_audit_state_icvfail(x, skb, x->type->proto); |