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linux/net/ipv6
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Eric Dumazet 95ffa33e3c udp: fix behavior of wrong checksums 
commit beb39db59d 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: Luis Henriques <luis.henriques@canonical.com>
History 2015-06-12 13:35:35 +01:00
..
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2014-05-30 17:54:47 -07:00
addrconf.c ipv6: remove rt6i_genid 2014-10-15 12:05:29 +02:00
addrconf_core.c ipv6: remove rt6i_genid 2014-10-15 12:05:29 +02:00
addrlabel.c ipv6:fix checkpatch errors with assignment in if condition 2014-02-17 16:57:29 -05:00
af_inet6.c net: Eliminate no_check from protosw 2014-05-23 16:28:53 -04:00
ah6.c ah6: Use the IPsec protocol multiplexer API 2014-03-14 07:28:07 +01:00
anycast.c ipv6: restore the behavior of ipv6_sock_ac_drop() 2014-10-15 12:05:28 +02:00
datagram.c ip: zero sockaddr returned on error queue 2015-02-10 13:38:48 +00:00
esp6.c esp6: Use the IPsec protocol multiplexer API 2014-03-14 07:28:07 +01:00
exthdrs.c ipv6/exthdrs: accept tlv which includes only padding 2013-09-11 15:52:27 -04:00
exthdrs_core.c ipv6: ipv6_find_hdr restore prev functionality 2014-02-27 18:27:26 -05:00
exthdrs_offload.c ipv6: Fix exthdrs offload registration. 2014-03-06 16:35:55 -05:00
fib6_rules.c ipv6: fix backtracking for throw routes 2015-03-24 10:34:13 +00:00
icmp.c net: add a sysctl to reflect the fwmark on replies 2014-05-13 18:35:08 -04:00
inet6_connection_sock.c net: support marking accepting TCP sockets 2014-05-13 18:35:09 -04:00
inet6_hashtables.c inet: convert inet_ehash_secret and ipv6_hash_secret to net_get_random_once 2013-10-19 19:45:35 -04:00
ip6_checksum.c udp: Generic functions to set checksum 2014-06-04 22:46:38 -07:00
ip6_fib.c ipv6: fix ECMP route replacement 2015-06-02 13:02:14 +01:00
ip6_flowlabel.c net: ipv6: Introduce ip6_sk_dst_hoplimit. 2014-04-30 13:31:26 -04:00
ip6_gre.c ip6_gre: fix endianness errors in ip6gre_err 2015-03-20 09:38:28 +00:00
ip6_icmp.c ipv6: Kill ipv6 dependency of icmpv6_send(). 2013-04-29 13:54:36 -04:00
ip6_input.c net: Fix memory leak if TPROXY used with TCP early demux 2014-01-27 16:22:11 -08:00
ip6_offload.c gre: Call gso_make_checksum 2014-06-04 22:46:38 -07:00
ip6_offload.h ipv6: Pull IPv6 GSO registration out of the module 2012-11-15 17:39:24 -05:00
ip6_output.c ipv6: protect skb->sk accesses from recursive dereference inside the stack 2015-04-27 09:48:14 +01:00
ip6_tunnel.c ip6_tunnel: Use ip6_tnl_dev_init as the ndo_init function. 2014-11-27 11:21:53 +00:00
ip6_vti.c vti6: fix uninit when using x-netns 2015-05-06 11:33:05 +01:00
ip6mr.c net: ipv6: more places need LOOPBACK_IFINDEX for flowi6_iif 2014-04-28 14:47:03 -04:00
ipcomp6.c ipcomp6: Use the IPsec protocol multiplexer API 2014-03-14 07:28:07 +01:00
ipv6_sockglue.c ipv6: yet another new IPV6_MTU_DISCOVER option IPV6_PMTUDISC_OMIT 2014-02-26 15:51:01 -05:00
Kconfig ip6_vti: Fix build when NET_IP_TUNNEL is not set. 2014-02-20 14:29:49 +01:00
Makefile xfrm6: Add IPsec protocol multiplexer 2014-03-14 07:28:07 +01:00
mcast.c ipv6: mld: fix add_grhead skb_over_panic for devs with large MTUs 2015-03-02 15:04:45 +00:00
mip6.c ipv4/ipv6: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
ndisc.c ipv6: Don't reduce hop limit for an interface 2015-04-10 10:04:08 +01:00
netfilter.c netfilter: Fix potential use after free in ip6_route_me_harder() 2014-05-09 02:36:39 +02:00
output_core.c drivers/net, ipv6: Select IPv6 fragment idents for virtio UFO packets 2014-12-10 17:49:35 +00:00
ping.c net: ping: Return EAFNOSUPPORT when appropriate. 2015-03-12 16:45:17 +00:00
proc.c snmp: fix some left over of snmp stats 2014-05-14 15:33:47 -04:00
protocol.c net: remove outdated comment for ipv4 and ipv6 protocol handler 2013-11-28 18:47:51 -05:00
raw.c net: Eliminate no_check from protosw 2014-05-23 16:28:53 -04:00
reassembly.c ipv6: split inet6_hash_frag for netfilter and initialize secrets with net_get_random_once 2013-10-23 17:01:40 -04:00
route.c ipv6: fix ECMP route replacement 2015-06-02 13:02:14 +01:00
sit.c sit: Use ipip6_tunnel_init as the ndo_init function. 2014-11-27 11:21:53 +00:00
syncookies.c net: support marking accepting TCP sockets 2014-05-13 18:35:09 -04:00
sysctl_net_ipv6.c net: add a sysctl to reflect the fwmark on replies 2014-05-13 18:35:08 -04:00
tcp_ipv6.c tcp/ipv6: fix flow label setting in TIME_WAIT state 2015-06-02 13:00:40 +01:00
tcpv6_offload.c net-gre-gro: Fix a bug that breaks the forwarding path 2014-07-16 14:45:26 -07:00
tunnel6.c ipv4/ipv6: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
udp.c udp: fix behavior of wrong checksums 2015-06-12 13:35:35 +01:00
udp_impl.h net: ipv4/ipv6: Remove extern from function prototypes 2013-10-19 19:12:11 -04:00
udp_offload.c gre: Call gso_make_checksum 2014-06-04 22:46:38 -07:00
udplite.c net: Eliminate no_check from protosw 2014-05-23 16:28:53 -04:00
xfrm6_input.c netfilter: ipv6: use NFPROTO values for NF_HOOK invocation 2010-03-25 16:00:49 +01:00
xfrm6_mode_beet.c ipsec: be careful of non existing mac headers 2012-02-23 16:50:45 -05:00
xfrm6_mode_ro.c ipv4/ipv6: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
xfrm6_mode_transport.c [IPSEC]: Use IPv6 calling convention as the convention for x->mode->output 2007-10-10 16:55:54 -07:00
xfrm6_mode_tunnel.c xfrm6: Remove xfrm_tunnel_notifier 2014-03-14 07:28:08 +01:00
xfrm6_output.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-05-24 00:32:30 -04:00
xfrm6_policy.c xfrm6: Add IPsec protocol multiplexer 2014-03-14 07:28:07 +01:00
xfrm6_protocol.c xfrm6: Properly handle unsupported protocols 2014-05-06 07:08:38 +02:00
xfrm6_state.c xfrm: make local error reporting more robust 2013-08-14 13:07:12 +02:00
xfrm6_tunnel.c ipv4/ipv6: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00