Paolo Abeni 5ecb7acce9 udp: fix rx queue len reported by diag and proc interface ...

[ Upstream commit 6c206b2009 ]

After commit 6b229cf77d ("udp: add batching to udp_rmem_release()")
the sk_rmem_alloc field does not measure exactly anymore the
receive queue length, because we batch the rmem release. The issue
is really apparent only after commit 0d4a6608f6 ("udp: do rmem bulk
free even if the rx sk queue is empty"): the user space can easily
check for an empty socket with not-0 queue length reported by the 'ss'
tool or the procfs interface.

We need to use a custom UDP helper to report the correct queue length,
taking into account the forward allocation deficit.

Reported-by: trevor.francis@46labs.com
Fixes: 6b229cf77d ("UDP: add batching to udp_rmem_release()")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-06-26 07:53:55 +08:00

..

ila

rhashtable: Change rhashtable_walk_start to return void

2017-12-11 09:58:38 -05:00

netfilter

netfilter: nf_tables: NAT chain and extensions require NF_TABLES

2018-06-21 04:01:20 +09:00

addrconf_core.c

net: ipv6: Make inet6addr_validator a blocking notifier

2017-10-20 13:15:07 +01:00

addrconf.c

ipv6: addrconf: break critical section in addrconf_verify_rtnl()

2018-01-29 14:23:38 -05:00

addrlabel.c

rtnetlink: ipv6: convert remaining users to rtnl_register_module

2017-12-04 13:35:36 -05:00

af_inet6.c

ipv6: Fix SO_REUSEPORT UDP socket with implicit sk_ipv6only

2018-01-29 11:37:40 -05:00

ah6.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

2017-11-15 11:56:19 -08:00

anycast.c

net: delete /proc THIS_MODULE references

2018-01-16 15:01:33 -05:00

calipso.c

net, calipso: convert calipso_doi.refcount from atomic_t to refcount_t

2017-07-04 22:35:16 +01:00

datagram.c

udp: fix rx queue len reported by diag and proc interface

2018-06-26 07:53:55 +08:00

esp6_offload.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2018-01-23 13:51:56 -05:00

esp6.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2018-01-17 00:10:42 -05:00

exthdrs_core.c

net: ipv6: remove unused code in ipv6_find_hdr()

2017-10-05 21:53:02 -07:00

exthdrs_offload.c

…

exthdrs.c

ipv6: sr: fix TLVs not being copied using setsockopt

2018-01-10 16:03:55 -05:00

fib6_notifier.c

net: Add module reference to FIB notifiers

2017-09-01 20:33:42 -07:00

fib6_rules.c

net: ipv6: avoid overhead when no custom FIB rules are installed

2017-08-08 21:40:08 -07:00

fou6.c

fou: make local function static

2017-05-21 13:42:36 -04:00

icmp.c

ipv6: mark expected switch fall-throughs

2017-10-18 14:13:08 +01:00

inet6_connection_sock.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2017-01-28 10:33:06 -05:00

inet6_hashtables.c

inet: Add a 2nd listener hashtable (port+addr)

2017-12-03 10:18:28 -05:00

ip6_checksum.c

udplite: fix partial checksum initialization

2018-02-16 15:57:42 -05:00

ip6_fib.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2018-01-19 22:59:33 -05:00

ip6_flowlabel.c

net: delete /proc THIS_MODULE references

2018-01-16 15:01:33 -05:00

ip6_gre.c

net: ip6_gre: fix tunnel metadata device sharing.

2018-05-25 16:46:04 +02:00

ip6_icmp.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

ip6_input.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2017-04-20 10:35:33 -04:00

ip6_offload.c

gso: fix payload length when gso_size is zero

2017-10-08 10:12:15 -07:00

ip6_offload.h

…

ip6_output.c

vrf: check the original netdevice for generating redirect

2018-06-11 22:48:17 +02:00

ip6_tunnel.c

ip6_tunnel: remove magic mtu value 0xFFF8

2018-06-11 22:48:14 +02:00

ip6_udp_tunnel.c

ip6_udp_tunnel: remove unused IPCB related codes

2016-11-02 15:18:36 -04:00

ip6_vti.c

vti6: Change minimum MTU to IPV4_MIN_MTU, vti6 can carry IPv4 too

2018-06-21 04:01:27 +09:00

ip6mr.c

ip6mr: only set ip6mr_table from setsockopt when ip6mr_new_table succeeds

2018-06-11 22:48:14 +02:00

ipcomp6.c

net: inet: Support UID-based routing in IP protocols.

2016-11-04 14:45:23 -04:00

ipv6_sockglue.c

netfilter: drop outermost socket lock in getsockopt()

2018-02-14 20:44:42 +01:00

Kconfig

ipv6: sr: add helper functions for seg6local

2017-08-25 17:10:24 -07:00

Makefile

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

mcast_snoop.c

…

mcast.c

build_bug.h: remove BUILD_BUG_ON_NULL()

2018-02-06 18:32:46 -08:00

mip6.c

ktime: Get rid of ktime_equal()

2016-12-25 17:21:23 +01:00

ndisc.c

vrf: check the original netdevice for generating redirect

2018-06-11 22:48:17 +02:00

netfilter.c

netfilter: use skb_to_full_sk in ip6_route_me_harder

2018-02-25 20:51:13 +01:00

output_core.c

net: accept UFO datagrams from tuntap and packet

2017-11-24 01:37:35 +09:00

ping.c

net/ipv6: Convert icmpv6_push_pending_frames to void

2017-10-06 09:52:31 -07:00

proc.c

net: delete /proc THIS_MODULE references

2018-01-16 15:01:33 -05:00

protocol.c

net: Add sysctl to toggle early demux for tcp and udp

2017-03-24 13:17:07 -07:00

raw.c

Merge tag 'usercopy-v4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

2018-02-03 16:25:42 -08:00

reassembly.c

inet: frags: Convert timers to use timer_setup()

2017-10-18 12:39:55 +01:00

route.c

ipv6: allow PMTU exceptions to local routes

2018-06-26 07:53:53 +08:00

seg6_hmac.c

ipv6: sr: Use ARRAY_SIZE macro

2017-09-01 18:35:23 -07:00

seg6_iptunnel.c

ipv6: sr: fix memory OOB access in seg6_do_srh_encap/inline

2018-06-11 22:48:17 +02:00

seg6_local.c

ipv6: use ARRAY_SIZE for array sizing calculation on array seg6_action_table

2018-01-09 11:40:46 -05:00

seg6.c

rhashtable: Change rhashtable_walk_start to return void

2017-12-11 09:58:38 -05:00

sit.c

ip6_tunnel: remove magic mtu value 0xFFF8

2018-06-11 22:48:14 +02:00

syncookies.c

net/ipv4: disable SMC TCP option with SYN Cookies

2018-03-25 20:53:54 -04:00

sysctl_net_ipv6.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2017-11-04 09:26:51 +09:00

tcp_ipv6.c

tcp: verify the checksum of the first data segment in a new connection

2018-06-26 07:53:54 +08:00

tcpv6_offload.c

gso: validate gso_type in GSO handlers

2018-01-22 16:01:30 -05:00

tunnel6.c

…

udp_impl.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

udp_offload.c

gso: validate gso_type in GSO handlers

2018-01-22 16:01:30 -05:00

udp.c

udp: fix rx queue len reported by diag and proc interface

2018-06-26 07:53:55 +08:00

udplite.c

net: delete /proc THIS_MODULE references

2018-01-16 15:01:33 -05:00

xfrm6_input.c

xfrm: Reinject transport-mode packets through tasklet

2017-12-19 08:23:21 +01:00

xfrm6_mode_beet.c

networking: make skb_pull & friends return void pointers

2017-06-16 11:48:39 -04:00

xfrm6_mode_ro.c

ipv6: xfrm: Handle errors reported by xfrm6_find_1stfragopt()

2017-06-02 13:57:27 -04:00

xfrm6_mode_transport.c

ipv6: xfrm: Handle errors reported by xfrm6_find_1stfragopt()

2017-06-02 13:57:27 -04:00

xfrm6_mode_tunnel.c

xfrm: Verify MAC header exists before overwriting eth_hdr(skb)->h_proto

2018-03-07 10:54:29 +01:00

xfrm6_output.c

net: xfrm: use skb_gso_validate_network_len() to check gso sizes

2018-03-04 17:49:17 -05:00

xfrm6_policy.c

xfrm: reuse uncached_list to track xdsts

2018-02-16 07:03:33 +01:00

xfrm6_protocol.c

xfrm: input: constify xfrm_input_afinfo

2017-02-09 10:22:17 +01:00

xfrm6_state.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

xfrm6_tunnel.c

xfrm6_tunnel: exit_net cleanup check added

2017-11-14 15:46:17 +09:00