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| author | Pablo Neira <pablo@netfilter.org> | 2016-05-10 21:33:38 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-05-10 15:56:23 -0400 |
| commit | 93edb8c7f94fb3d384790ac8a83c3fb9389f6ca5 (patch) | |
| tree | 76baacecad6ebd442b864df240b9ed5224107e41 /drivers/net/gtp.c | |
| parent | 1dee3f59a8d5e711797dc82628aaf94a64e99922 (diff) | |
| download | linux-93edb8c7f94fb3d384790ac8a83c3fb9389f6ca5.tar.gz linux-93edb8c7f94fb3d384790ac8a83c3fb9389f6ca5.tar.bz2 linux-93edb8c7f94fb3d384790ac8a83c3fb9389f6ca5.zip | |
gtp: reload GTPv1 header after pskb_may_pull()
The GTPv1 header flags indicate the presence of optional extensions
after this header. Refresh the pointer to the GTPv1 header as skb->head
might have be reallocated via pskb_may_pull().
Fixes: 459aa660eb1d ("gtp: add initial driver for datapath of GPRS Tunneling Protocol (GTP-U)")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/gtp.c')
| -rw-r--r-- | drivers/net/gtp.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c index 8ce1104e4fdb..f7caf1e35d83 100644 --- a/drivers/net/gtp.c +++ b/drivers/net/gtp.c @@ -253,6 +253,8 @@ static int gtp1u_udp_encap_recv(struct gtp_dev *gtp, struct sk_buff *skb, if (!pskb_may_pull(skb, hdrlen)) return -1; + gtp1 = (struct gtp1_header *)(skb->data + sizeof(struct udphdr)); + rcu_read_lock(); pctx = gtp1_pdp_find(gtp, ntohl(gtp1->tid)); if (!pctx) { |