]> git.karo-electronics.de Git - linux-beck.git/commit
gro: Disable frag0 optimization on IPv6 ext headers
authorHerbert Xu <herbert@gondor.apana.org.au>
Tue, 10 Jan 2017 20:24:15 +0000 (12:24 -0800)
committerDavid S. Miller <davem@davemloft.net>
Wed, 11 Jan 2017 02:30:33 +0000 (21:30 -0500)
commit57ea52a865144aedbcd619ee0081155e658b6f7d
treeb1a308499831346c7e39072c41c4e503c9113530
parent1272ce87fa017ca4cf32920764d879656b7a005a
gro: Disable frag0 optimization on IPv6 ext headers

The GRO fast path caches the frag0 address.  This address becomes
invalid if frag0 is modified by pskb_may_pull or its variants.
So whenever that happens we must disable the frag0 optimization.

This is usually done through the combination of gro_header_hard
and gro_header_slow, however, the IPv6 extension header path did
the pulling directly and would continue to use the GRO fast path
incorrectly.

This patch fixes it by disabling the fast path when we enter the
IPv6 extension header path.

Fixes: 78a478d0efd9 ("gro: Inline skb_gro_header and cache frag0 virtual address")
Reported-by: Slava Shwartsman <slavash@mellanox.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/linux/netdevice.h
net/ipv6/ip6_offload.c