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beb39db59d
linux/net/ipv4
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Eric Dumazet beb39db59d udp: fix behavior of wrong checksums 
We have two problems in UDP stack related to bogus checksums :

1) We return -EAGAIN to application even if receive queue is not empty.
   This breaks applications using edge trigger epoll()

2) Under UDP flood, we can loop forever without yielding to other
   processes, potentially hanging the host, especially on non SMP.

This patch is an attempt to make things better.

We might in the future add extra support for rt applications
wanting to better control time spent doing a recv() in a hostile
environment. For example we could validate checksums before queuing
packets in socket receive queue.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-31 21:42:18 -07:00
..
netfilter netfilter: ensure number of counters is >0 in do_replace() 2015-05-20 13:46:49 +02:00
af_inet.c ipv4: coding style: comparison for inequality with NULL 2015-04-03 12:11:15 -04:00
ah4.c
arp.c netfilter: Pass socket pointer down through okfn(). 2015-04-07 15:25:55 -04:00
cipso_ipv4.c ipv4: coding style: comparison for inequality with NULL 2015-04-03 12:11:15 -04:00
datagram.c
devinet.c ipv4: coding style: comparison for inequality with NULL 2015-04-03 12:11:15 -04:00
esp4.c esp4: Use high-order sequence number bits for IV generation 2015-05-13 09:34:53 +02:00
fib_frontend.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-04-06 22:34:15 -04:00
fib_lookup.h ipv4: FIB Local/MAIN table collapse 2015-03-11 16:22:14 -04:00
fib_rules.c ipv4: coding style: comparison for equality with NULL 2015-04-03 12:11:15 -04:00
fib_semantics.c ipv4: coding style: comparison for equality with NULL 2015-04-03 12:11:15 -04:00
fib_trie.c ipv4: fill in table id when replacing a route 2015-05-22 14:33:17 -04:00
fou.c fou: avoid missing unlock in failure path 2015-04-16 12:11:19 -04:00
geneve.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-04-14 15:44:14 -04:00
gre_demux.c
gre_offload.c ipv4: coding style: comparison for inequality with NULL 2015-04-03 12:11:15 -04:00
icmp.c ipv4: coding style: comparison for equality with NULL 2015-04-03 12:11:15 -04:00
igmp.c ipv4: coding style: comparison for inequality with NULL 2015-04-03 12:11:15 -04:00
inet_connection_sock.c inet: fix possible panic in reqsk_queue_unlink() 2015-04-24 11:39:15 -04:00
inet_diag.c tcp: prepare CC get_info() access from getsockopt() 2015-04-29 17:10:38 -04:00
inet_fragment.c ipv4: coding style: comparison for equality with NULL 2015-04-03 12:11:15 -04:00
inet_hashtables.c tcp/dccp: get rid of central timewait timer 2015-04-13 16:40:05 -04:00
inet_lro.c
inet_timewait_sock.c tcp/dccp: get rid of central timewait timer 2015-04-13 16:40:05 -04:00
inetpeer.c
ip_forward.c ip_forward: Drop frames with attached skb->sk 2015-04-20 14:07:33 -04:00
ip_fragment.c ipv4: coding style: comparison for inequality with NULL 2015-04-03 12:11:15 -04:00
ip_gre.c ipv4: coding style: comparison for equality with NULL 2015-04-03 12:11:15 -04:00
ip_input.c netfilter: Pass socket pointer down through okfn(). 2015-04-07 15:25:55 -04:00
ip_options.c ipv4: coding style: comparison for inequality with NULL 2015-04-03 12:11:15 -04:00
ip_output.c net: remove extra newlines 2015-04-07 22:24:37 -04:00
ip_sockglue.c ipv4: coding style: comparison for inequality with NULL 2015-04-03 12:11:15 -04:00
ip_tunnel_core.c ipv4: ip_tunnel: use net namespace from rtable not socket 2015-04-08 12:09:42 -04:00
ip_tunnel.c udp_tunnel: Pass UDP socket down through udp_tunnel{, 6}_xmit_skb(). 2015-04-07 15:29:08 -04:00
ip_vti.c ip_vti/ip6_vti: Preserve skb->mark after rcv_cb call 2015-05-28 06:23:32 +02:00
ipcomp.c ipv4: coding style: comparison for equality with NULL 2015-04-03 12:11:15 -04:00
ipconfig.c ipv4: coding style: comparison for equality with NULL 2015-04-03 12:11:15 -04:00
ipip.c ipv4: coding style: comparison for equality with NULL 2015-04-03 12:11:15 -04:00
ipmr.c netfilter: Pass socket pointer down through okfn(). 2015-04-07 15:25:55 -04:00
Kconfig
Makefile
netfilter.c netfilter: Use nf_hook_state in nf_queue_entry. 2015-04-04 12:25:22 -04:00
ping.c ipv4: Missing sk_nulls_node_init() in ping_unhash(). 2015-05-01 22:02:47 -04:00
proc.c tcp/dccp: get rid of central timewait timer 2015-04-13 16:40:05 -04:00
protocol.c
raw.c Merge branch 'for-davem' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-04-13 18:18:05 -04:00
route.c ipv4: Avoid crashing in ip_error 2015-05-22 14:23:40 -04:00
syncookies.c tcp: fix ipv4 mapped request socks 2015-03-25 00:57:48 -04:00
sysctl_net_ipv4.c ipv4: coding style: comparison for equality with NULL 2015-04-03 12:11:15 -04:00
tcp_bic.c
tcp_cong.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-03-20 18:51:09 -04:00
tcp_cubic.c tcp: restore 1.5x per RTT limit to CUBIC cwnd growth in congestion avoidance 2015-03-11 16:51:51 -04:00
tcp_dctcp.c tcp: prepare CC get_info() access from getsockopt() 2015-04-29 17:10:38 -04:00
tcp_diag.c ipv4: coding style: comparison for inequality with NULL 2015-04-03 12:11:15 -04:00
tcp_fastopen.c tcp: fix a potential deadlock in tcp_get_info() 2015-05-22 13:46:06 -04:00
tcp_highspeed.c
tcp_htcp.c
tcp_hybla.c
tcp_illinois.c tcp: prepare CC get_info() access from getsockopt() 2015-04-29 17:10:38 -04:00
tcp_input.c tcp: fix a potential deadlock in tcp_get_info() 2015-05-22 13:46:06 -04:00
tcp_ipv4.c inet: fix possible panic in reqsk_queue_unlink() 2015-04-24 11:39:15 -04:00
tcp_lp.c
tcp_memcontrol.c
tcp_metrics.c tcp: RFC7413 option support for Fast Open client 2015-04-07 18:36:39 -04:00
tcp_minisocks.c tcp/ipv6: fix flow label setting in TIME_WAIT state 2015-05-17 23:41:59 -04:00
tcp_offload.c
tcp_output.c tcp: avoid looping in tcp_send_fin() 2015-04-24 11:06:48 -04:00
tcp_probe.c
tcp_scalable.c
tcp_timer.c tcp: RFC7413 option support for Fast Open client 2015-04-07 18:36:39 -04:00
tcp_vegas.c tcp: prepare CC get_info() access from getsockopt() 2015-04-29 17:10:38 -04:00
tcp_vegas.h tcp: prepare CC get_info() access from getsockopt() 2015-04-29 17:10:38 -04:00
tcp_veno.c
tcp_westwood.c tcp_westwood: fix tcp_westwood_info() 2015-05-05 19:50:09 -04:00
tcp_yeah.c
tcp.c tcp: fix a potential deadlock in tcp_get_info() 2015-05-22 13:46:06 -04:00
tunnel4.c
udp_diag.c ipv4: coding style: comparison for equality with NULL 2015-04-03 12:11:15 -04:00
udp_impl.h net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
udp_offload.c ipv4: coding style: comparison for inequality with NULL 2015-04-03 12:11:15 -04:00
udp_tunnel.c udp_tunnel: Pass UDP socket down through udp_tunnel{, 6}_xmit_skb(). 2015-04-07 15:29:08 -04:00
udp.c udp: fix behavior of wrong checksums 2015-05-31 21:42:18 -07:00
udplite.c
xfrm4_input.c netfilter: Pass socket pointer down through okfn(). 2015-04-07 15:25:55 -04:00
xfrm4_mode_beet.c
xfrm4_mode_transport.c
xfrm4_mode_tunnel.c ipv4: hash net ptr into fragmentation bucket selection 2015-03-25 14:07:04 -04:00
xfrm4_output.c netfilter: Pass socket pointer down through okfn(). 2015-04-07 15:25:55 -04:00
xfrm4_policy.c ipv4: coding style: comparison for equality with NULL 2015-04-03 12:11:15 -04:00
xfrm4_protocol.c
xfrm4_state.c
xfrm4_tunnel.c