Eric Dumazet 1c50a0ae29 udp: fix behavior of wrong checksums ... commit beb39db59d14990e401e235faf66a6b9b31240b0 upstream. 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> Signed-off-by: Zefan Li <lizefan@huawei.com>		2015-09-18 09:20:47 +08:00
..
netfilter	netfilter: ipv4: defrag: set local_df flag on defragmented skb	2014-06-16 13:45:45 -07:00
af_inet.c	ipv6: use a stronger hash for tcp	2013-02-28 06:59:06 -08:00
ah4.c	net: ipv4: Standardize prefixes for message logging	2012-03-12 17:05:21 -07:00
arp.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
cipso_ipv4.c	cipso: don't follow a NULL pointer when setsockopt() is called	2012-08-09 08:31:42 -07:00
datagram.c	ipv4: fix possible seqlock deadlock	2013-12-08 07:29:41 -08:00
devinet.c	Disintegrate and delete asm/system.h	2012-03-28 15:58:21 -07:00
esp4.c	esp4: fix error return code in esp_output()	2013-05-01 09:41:07 -07:00
fib_frontend.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
fib_lookup.h
fib_rules.c
fib_semantics.c	ipv4: fib_semantics: increment fib_info_cnt after fib_info allocation	2014-06-07 16:01:59 -07:00
fib_trie.c	fib_trie: remove potential out of bound access	2013-09-14 06:02:09 -07:00
gre.c	net: ipv4: Standardize prefixes for message logging	2012-03-12 17:05:21 -07:00
icmp.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
igmp.c	inetpeer: get rid of ip_id_count	2014-08-14 08:42:35 +08:00
inet_connection_sock.c	inet: Fix kmemleak in tcp_v4/6_syn_recv_sock and dccp_v4/6_request_recv_sock	2013-01-11 09:07:14 -08:00
inet_diag.c	inet_diag: fix inet_diag_dump_icsk() timewait socket state logic	2014-02-06 11:05:48 -08:00
inet_fragment.c	inet: limit length of fragment queue hash table bucket lists	2013-03-28 12:11:54 -07:00
inet_hashtables.c	net: do not call sock_put() on TIMEWAIT sockets	2013-11-04 04:23:40 -08:00
inet_lro.c
inet_timewait_sock.c
inetpeer.c	inetpeer: get rid of ip_id_count	2014-08-14 08:42:35 +08:00
ip_forward.c	Revert: "net: ip, ipv6: handle gso skbs in forwarding path"	2014-08-07 12:00:11 -07:00
ip_fragment.c	net: drop dst before queueing fragments	2013-05-01 09:41:20 -07:00
ip_gre.c	ip_tunnel: fix kernel panic with icmp_dest_unreach	2013-06-27 11:27:32 -07:00
ip_input.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
ip_options.c	ipv4: fix buffer overflow in ip_options_compile()	2014-07-28 07:06:46 -07:00
ip_output.c	Patch for 3.2.x, 3.4.x IP identifier regression	2015-02-02 17:05:26 +08:00
ip_sockglue.c	inet: fix addr_len/msg->msg_namelen assignment in recv_error and rxpmtu functions	2013-12-08 07:29:42 -08:00
ipcomp.c	net: Convert printks to pr_<level>	2012-03-11 23:42:51 -07:00
ipconfig.c	net: Convert printks to pr_<level>	2012-03-11 23:42:51 -07:00
ipip.c	net: tunnels - enable module autoloading	2014-06-26 15:10:28 -04:00
ipmr.c	inetpeer: get rid of ip_id_count	2014-08-14 08:42:35 +08:00
Kconfig	net: Fix build regression when INET_UDP_DIAG=y and IPV6=m	2012-02-07 13:35:28 -05:00
Makefile
netfilter.c
ping.c	ipv4: Missing sk_nulls_node_init() in ping_unhash().	2015-09-18 09:20:46 +08:00
proc.c	tcp: implement RFC 5961 4.2	2013-01-11 09:07:15 -08:00
protocol.c
raw.c	inetpeer: get rid of ip_id_count	2014-08-14 08:42:35 +08:00
route.c	ipv4: disable bh while doing route gc	2014-12-01 18:02:44 +08:00
syncookies.c	tcp: incoming connections might use wrong route under synflood	2013-05-01 09:41:07 -07:00
sysctl_net_ipv4.c	sysctl net: Keep tcp_syn_retries inside the boundary	2013-08-11 15:38:44 -07:00
tcp.c	tcp: fix tcp_md5_hash_skb_data()	2013-06-27 11:27:30 -07:00
tcp_bic.c
tcp_cong.c	tcp: Apply device TSO segment limit earlier	2012-10-02 10:29:34 -07:00
tcp_cubic.c	tcp_cubic: fix the range of delayed_ack	2014-06-07 16:01:59 -07:00
tcp_diag.c
tcp_highspeed.c
tcp_htcp.c
tcp_hybla.c
tcp_illinois.c	net: fix divide by zero in tcp algorithm illinois	2012-11-17 13:16:17 -08:00
tcp_input.c	tcp: fix false undo corner cases	2014-07-28 07:06:45 -07:00
tcp_ipv4.c	inet: fix possible seqlock deadlocks	2013-12-08 07:29:42 -08:00
tcp_lp.c
tcp_memcontrol.c	Merge branch 'for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2012-03-20 18:11:21 -07:00
tcp_minisocks.c	tcp: md5: rcu conversion	2012-01-31 12:14:00 -05:00
tcp_output.c	tcp: fix false undo corner cases	2014-07-28 07:06:45 -07:00
tcp_probe.c	net: ipv4: Standardize prefixes for message logging	2012-03-12 17:05:21 -07:00
tcp_scalable.c
tcp_timer.c	net: ipv4: Standardize prefixes for message logging	2012-03-12 17:05:21 -07:00
tcp_vegas.c	tcp: Fix integer-overflow in TCP vegas	2014-08-14 08:42:36 +08:00
tcp_vegas.h
tcp_veno.c	tcp: Fix integer-overflows in TCP veno	2014-08-14 08:42:36 +08:00
tcp_westwood.c
tcp_yeah.c
tunnel4.c	net: Convert printks to pr_<level>	2012-03-11 23:42:51 -07:00
udp.c	udp: fix behavior of wrong checksums	2015-09-18 09:20:47 +08:00
udp_diag.c	udp_diag: implement idiag_get_info for udp/udplite to get queue information	2012-04-25 20:43:01 -04:00
udp_impl.h
udplite.c	net: ipv4: Standardize prefixes for message logging	2012-03-12 17:05:21 -07:00
xfrm4_input.c
xfrm4_mode_beet.c	ipsec: be careful of non existing mac headers	2012-02-23 16:50:45 -05:00
xfrm4_mode_transport.c
xfrm4_mode_tunnel.c	inetpeer: get rid of ip_id_count	2014-08-14 08:42:35 +08:00
xfrm4_output.c
xfrm4_policy.c
xfrm4_state.c
xfrm4_tunnel.c	net: ipv4: Standardize prefixes for message logging	2012-03-12 17:05:21 -07:00