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authorSteffen Klassert <steffen.klassert@secunet.com>2017-04-28 10:54:32 +0200
committerDavid S. Miller <davem@davemloft.net>2017-04-28 16:00:38 -0400
commit9b83e0319840eca758ef586776a427284ff767bf (patch)
treeabeef13146401a752a054b63e092bd4193c3e925
parent504926df6df5383cad25146de3ed0a45e02c0901 (diff)
downloadlinux-9b83e0319840eca758ef586776a427284ff767bf.tar.bz2
ipv4: Don't pass IP fragments to upper layer GRO handlers.
Upper layer GRO handlers can not handle IP fragments, so exit GRO processing in this case. This fixes ESP GRO because the packet must be reassembled before we can decapsulate, otherwise we get authentication failures. It also aligns IPv4 to IPv6 where packets with fragmentation headers are not passed to upper layer GRO handlers. Fixes: 7785bba299a8 ("esp: Add a software GRO codepath") Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/af_inet.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 6b1fc6e4278e..13a9a3297eae 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1343,6 +1343,9 @@ struct sk_buff **inet_gro_receive(struct sk_buff **head, struct sk_buff *skb)
if (*(u8 *)iph != 0x45)
goto out_unlock;
+ if (ip_is_fragment(iph))
+ goto out_unlock;
+
if (unlikely(ip_fast_csum((u8 *)iph, 5)))
goto out_unlock;