diff options
| author | Willem de Bruijn <willemb@google.com> | 2017-08-10 12:29:19 -0400 |
|---|---|---|
| committer | Suren Baghdasaryan <surenb@google.com> | 2018-03-26 11:32:14 -0700 |
| commit | 0efe4409860f3de2e41432c70fae369bb07a35ac (patch) | |
| tree | 55d0d1464105e925c3594b8eda02baf353193894 /tools/perf/scripts/python/syscall-counts.py | |
| parent | 4dc9a8217bd1ca4f6c3a6eb9713dff6879627b3f (diff) | |
udp: consistently apply ufo or fragmentation
commit 85f1bd9a7b5a79d5baa8bf44af19658f7bf77bfa upstream.
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.
[gregkh - tweaks for 3.18 for ipv6, hopefully they are correct...]
[wt: s/skb_is_gso/skb_has_frags for 3.10]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Change-Id: Iac75f1be3304c7400e1c5d221a56476a0d60aba3
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions