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| author | Willem de Bruijn | 2017-08-10 18:29:19 +0200 |
|---|---|---|
| committer | David S. Miller | 2017-08-10 18:52:12 +0200 |
| commit | 85f1bd9a7b5a79d5baa8bf44af19658f7bf77bfa (patch) | |
| tree | dcf8a90eb6ae097aa5c962f8bec97e1ce4a5aab7 /net/packet/af_packet.c | |
| parent | net: sched: set xt_tgchk_param par.nft_compat as 0 in ipt_init_target (diff) | |
| download | kernel-qcow2-linux-85f1bd9a7b5a79d5baa8bf44af19658f7bf77bfa.tar.gz kernel-qcow2-linux-85f1bd9a7b5a79d5baa8bf44af19658f7bf77bfa.tar.xz kernel-qcow2-linux-85f1bd9a7b5a79d5baa8bf44af19658f7bf77bfa.zip | |
udp: consistently apply ufo or fragmentation
When iteratively building a UDP datagram with MSG_MORE and that
datagram exceeds MTU, consistently choose UFO or fragmentation.
Once skb_is_gso, always apply ufo. Conversely, once a datagram is
split across multiple skbs, do not consider ufo.
Sendpage already maintains the first invariant, only add the second.
IPv6 does not have a sendpage implementation to modify.
A gso skb must have a partial checksum, do not follow sk_no_check_tx
in udp_send_skb.
Found by syzkaller.
Fixes: e89e9cf539a2 ("[IPv4/IPv6]: UFO Scatter-gather approach")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/packet/af_packet.c')
0 files changed, 0 insertions, 0 deletions