[net-next PATCH 1/5] flow_dissector: Check for IP fragmentation even if not using IPv4 address
From: Alexander Duyck <hidden>
Date: 2016-02-24 17:29:40
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
This patch corrects the logic for the IPv4 parsing so that it is consistent
with how we handle IPv6. Specifically if we do not have the flow key
indicating we want the addresses we still may need to take a look at the IP
fragmentation bits and to see if we should stop after we have recognized
the L3 header.
Fixes: 807e165dc44f ("flow_dissector: Add control/reporting of fragmentation")
Signed-off-by: Alexander Duyck <redacted>
---
net/core/flow_dissector.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
index 12e700332010..1f88f8280280 100644
--- a/net/core/flow_dissector.c
+++ b/net/core/flow_dissector.c@@ -178,15 +178,16 @@ ip: ip_proto = iph->protocol; - if (!dissector_uses_key(flow_dissector, - FLOW_DISSECTOR_KEY_IPV4_ADDRS)) - break; + if (dissector_uses_key(flow_dissector, + FLOW_DISSECTOR_KEY_IPV4_ADDRS)) { + key_addrs = skb_flow_dissector_target(flow_dissector, + FLOW_DISSECTOR_KEY_IPV4_ADDRS, + target_container); - key_addrs = skb_flow_dissector_target(flow_dissector, - FLOW_DISSECTOR_KEY_IPV4_ADDRS, target_container); - memcpy(&key_addrs->v4addrs, &iph->saddr, - sizeof(key_addrs->v4addrs)); - key_control->addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; + memcpy(&key_addrs->v4addrs, &iph->saddr, + sizeof(key_addrs->v4addrs)); + key_control->addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; + } if (ip_is_fragment(iph)) { key_control->flags |= FLOW_DIS_IS_FRAGMENT;