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authorXin Long <lucien.xin@gmail.com>2020-04-10 12:06:01 +0300
committerSteffen Klassert <steffen.klassert@secunet.com>2020-04-15 10:50:03 +0300
commitafcaf61be9d1dbdee5ec186d1dcc67b6b692180f (patch)
tree04db326534ca011a16536e23e882713b27a18cd1 /net/xfrm/xfrm_input.c
parent91fac45cd0061854633036695cf37a11befa8062 (diff)
downloadlinux-afcaf61be9d1dbdee5ec186d1dcc67b6b692180f.tar.xz
xfrm: allow to accept packets with ipv6 NEXTHDR_HOP in xfrm_input
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>
Diffstat (limited to 'net/xfrm/xfrm_input.c')
-rw-r--r--net/xfrm/xfrm_input.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c
index aa35f23c4912..8a202c44f89a 100644
--- a/net/xfrm/xfrm_input.c
+++ b/net/xfrm/xfrm_input.c
@@ -644,7 +644,7 @@ 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);