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| author | Eric Dumazet <edumazet@google.com> | 2016-06-15 06:24:00 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-06-15 22:15:21 -0700 |
| commit | e582615ad33dbd39623084a02e95567b116e1eea (patch) | |
| tree | 16f807a602e42f6918f9991b0725bc6e26847025 /include/net/gre.h | |
| parent | daddef76c3deaaa7922f9d7b18edbf0a061215c3 (diff) | |
| download | linux-e582615ad33dbd39623084a02e95567b116e1eea.tar.gz linux-e582615ad33dbd39623084a02e95567b116e1eea.tar.bz2 linux-e582615ad33dbd39623084a02e95567b116e1eea.zip | |
gre: fix error handler
1) gre_parse_header() can be called from gre_err()
At this point transport header points to ICMP header, not the inner
header.
2) We can not really change transport header as ipgre_err() will later
assume transport header still points to ICMP header (using icmp_hdr())
3) pskb_may_pull() logic in gre_parse_header() really works
if we are interested at zone pointed by skb->data
4) As Jiri explained in commit b7f8fe251e46 ("gre: do not pull header in
ICMP error processing") we should not pull headers in error handler.
So this fix :
A) changes gre_parse_header() to use skb->data instead of
skb_transport_header()
B) Adds a nhs parameter to gre_parse_header() so that we can skip the
not pulled IP header from error path.
This offset is 0 for normal receive path.
C) remove obsolete IPV6 includes
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Tom Herbert <tom@herbertland.com>
Cc: Maciej Żenczykowski <maze@google.com>
Cc: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/gre.h')
| -rw-r--r-- | include/net/gre.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/gre.h b/include/net/gre.h index 5dce30a6abe3..7a54a31d1d4c 100644 --- a/include/net/gre.h +++ b/include/net/gre.h @@ -26,7 +26,7 @@ int gre_del_protocol(const struct gre_protocol *proto, u8 version); struct net_device *gretap_fb_dev_create(struct net *net, const char *name, u8 name_assign_type); int gre_parse_header(struct sk_buff *skb, struct tnl_ptk_info *tpi, - bool *csum_err, __be16 proto); + bool *csum_err, __be16 proto, int nhs); static inline int gre_calc_hlen(__be16 o_flags) { |