Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Eric Dumazet 774bacf121 tcp: fix SO_RCVLOWAT related hangs under mem pressure ... [ Upstream commit f969dc5a885736842c3511ecdea240fbb02d25d9 ] While commit 24adbc1676af ("tcp: fix SO_RCVLOWAT hangs with fat skbs") fixed an issue vs too small sk_rcvbuf for given sk_rcvlowat constraint, it missed to address issue caused by memory pressure. 1) If we are under memory pressure and socket receive queue is empty. First incoming packet is allowed to be queued, after commit 76dfa60820 ("tcp: allow one skb to be received per socket under memory pressure") But we do not send EPOLLIN yet, in case tcp_data_ready() sees sk_rcvlowat is bigger than skb length. 2) Then, when next packet comes, it is dropped, and we directly call sk->sk_data_ready(). 3) If application is using poll(), tcp_poll() will then use tcp_stream_is_readable() and decide the socket receive queue is not yet filled, so nothing will happen. Even when sender retransmits packets, phases 2) & 3) repeat and flow is effectively frozen, until memory pressure is off. Fix is to consider tcp_under_memory_pressure() to take care of global memory pressure or memcg pressure. Fixes: 24adbc1676af ("tcp: fix SO_RCVLOWAT hangs with fat skbs") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Arjun Roy <arjunroy@google.com> Suggested-by: Wei Wang <weiwan@google.com> Reviewed-by: Wei Wang <weiwan@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-03-04 10:26:17 +01:00
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9p
bluetooth	Bluetooth: Disconnect if E0 is used for Level 4	2020-10-17 10:11:22 +02:00
caif
iucv
netfilter	netfilter: nft_dynset: fix timeouts later than 23 days	2020-12-30 11:50:54 +01:00
netns	netfilter: nf_tables: autoload modules from the abort path	2020-01-29 16:45:33 +01:00
nfc	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
phonet
sctp	net: sctp: Fix IPv6 ancestor_size calc in sctp_copy_descendant	2020-09-26 18:03:13 +02:00
tc_act	net: sched: take reference to psample group in flow_action infra	2019-09-16 09:18:03 +02:00
6lowpan.h
act_api.h	net_sched: defer tcf_idr_insert() in tcf_action_init_1()	2020-10-14 10:33:06 +02:00
addrconf.h	ipv6: fix memory leaks on IPV6_ADDRFORM path	2020-08-11 15:33:39 +02:00
af_ieee802154.h
af_rxrpc.h	rxrpc: Make rxrpc_kernel_get_srtt() indicate validity	2020-09-09 19:12:23 +02:00
af_unix.h
af_vsock.h
ah.h
arp.h	net: avoid potential false sharing in neighbor related code	2019-12-31 16:45:03 +01:00
atmclip.h
ax25.h
ax88796.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
bond_3ad.h
bond_alb.h
bond_options.h	bonding: add an option to specify a delay between peer notifications	2019-07-04 12:30:48 -07:00
bonding.h	bonding: wait for sysfs kobject destruction before freeing struct slave	2020-12-08 10:40:24 +01:00
bpf_sk_storage.h	bpf: support cloning sk storage on accept()	2019-08-17 23:18:54 +02:00
busy_poll.h	net: annotate lockless accesses to sk->sk_napi_id	2019-10-30 17:34:35 -07:00
calipso.h
cfg80211-wext.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
cfg80211.h	cfg80211: Fix radar event during another phy CAC	2020-02-05 21:22:46 +00:00
cfg802154.h
checksum.h
cipso_ipv4.h
cls_cgroup.h
codel.h
codel_impl.h
codel_qdisc.h
compat.h
datalink.h
dcbevent.h
dcbnl.h
devlink.h	devlink: disallow reload operation during device cleanup	2019-11-09 19:38:36 -08:00
dn.h
dn_dev.h
dn_fib.h
dn_neigh.h
dn_nsp.h
dn_route.h
drop_monitor.h	net: drop_monitor: use IS_REACHABLE() to guard net_dm_hw_report()	2020-05-27 17:46:24 +02:00
dsa.h	net: dsa: Pass ndo_setup_tc slave callback to drivers	2019-09-16 21:32:57 +02:00
dsfield.h
dst.h	net: Added pointer check for dst->ops->neigh_lookup in dst_neigh_lookup_skb	2020-07-22 09:32:47 +02:00
dst_cache.h
dst_metadata.h
dst_ops.h	net: add bool confirm_neigh parameter for dst_ops.update_pmtu	2020-01-04 19:18:58 +01:00
erspan.h
esp.h
ethoc.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
failover.h
fib_notifier.h
fib_rules.h	fib: add missing attribute validation for tun_id	2020-03-18 07:17:44 +01:00
firewire.h
flow.h	ipv4: Initialize flowi4_multipath_hash in data path	2020-09-26 18:03:12 +02:00
flow_dissector.h	net: sched: correct flower port blocking	2020-03-05 16:43:32 +01:00
flow_offload.h	net: core: rename indirect block ingress cb function	2019-12-18 16:08:47 +01:00
fou.h
fq.h	net/flow_dissector: switch to siphash	2019-10-23 20:13:22 -07:00
fq_impl.h	net/fq_impl: Switch to kvmalloc() for memory allocation	2019-11-08 09:11:49 +01:00
garp.h
gen_stats.h
genetlink.h	genetlink: remove genl_bind	2020-07-22 09:32:46 +02:00
geneve.h
gre.h
gro_cells.h
gtp.h
gue.h	net:gue.h:Fix shifting signed 32-bit value by 31 bits problem	2019-07-01 10:58:23 -07:00
hwbm.h	net: hwbm: if CONFIG_NET_HWBM unset, make stub functions static	2019-10-25 16:24:32 -07:00
icmp.h
ieee80211_radiotap.h
ieee802154_netdev.h
if_inet6.h	ipv6: shrink struct ipv6_mc_socklist	2019-08-28 14:43:03 -07:00
ife.h
ila.h
inet6_connection_sock.h
inet6_hashtables.h
inet_common.h	inet: factor out inet_send_prepare()	2019-07-03 13:51:54 -07:00
inet_connection_sock.h	tcp: fix TCP_USER_TIMEOUT with zero window	2021-01-27 11:47:55 +01:00
inet_ecn.h	inet_ecn: Fix endianness of checksum update when setting ECT(1)	2020-12-08 10:40:25 +01:00
inet_frag.h	inet: frags: re-introduce skb coalescing for local delivery	2019-08-08 15:55:10 -07:00
inet_hashtables.h	dccp: Fix possible memleak in dccp_init and dccp_fini	2020-06-17 16:40:32 +02:00
inet_sock.h	ip: support SO_MARK cmsg	2019-09-13 21:44:19 +02:00
inet_timewait_sock.h	tcp: honor SO_PRIORITY in TIME_WAIT state	2019-09-27 12:05:02 +02:00
inetpeer.h
ip.h	net/ipv4: always honour route mtu during forwarding	2020-10-29 09:57:24 +01:00
ip6_checksum.h
ip6_fib.h	ipv6: Use global sernum for dst validation with nexthop objects	2020-05-14 07:58:20 +02:00
ip6_route.h	net: ipv6: do not consider routes via gateways for anycast address check	2020-04-21 09:04:45 +02:00
ip6_tunnel.h	ip6_tunnel: allow not to count pkts on tstats by passing dev as NULL	2019-06-18 20:48:45 -04:00
ip_fib.h	ipv4: nexthop version of fib_info_nh_uses_dev	2020-06-03 08:21:37 +02:00
ip_tunnels.h	ip_tunnels: Set tunnel option flag when tunnel metadata is present	2020-11-24 13:29:05 +01:00
ip_vs.h	ipvs: allow connection reuse for unconfirmed conntrack	2020-08-19 08:16:10 +02:00
ipcomp.h
ipconfig.h
ipv6.h	net: ipv6: add net argument to ip6_dst_lookup_flow	2019-12-18 16:08:40 +01:00
ipv6_frag.h	inet: fix various use-after-free in defrags units	2019-06-19 11:37:47 -04:00
ipv6_stubs.h	net: ipv6_stub: use ip6_dst_lookup_flow instead of ip6_dst_lookup	2019-12-18 16:08:42 +01:00
ipx.h	bonding/alb: properly access headers in bond_alb_xmit()	2020-02-11 04:35:48 -08:00
iw_handler.h
kcm.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
l3mdev.h
lag.h
lapb.h
lib80211.h
llc.h
llc_c_ac.h
llc_c_ev.h
llc_c_st.h
llc_conn.h	llc: fix sk_buff leak in llc_conn_service()	2019-10-08 13:23:05 -07:00
llc_if.h
llc_pdu.h
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
lwtunnel.h
mac80211.h	mac80211: populate debugfs only after cfg80211 init	2020-04-29 16:33:18 +02:00
mac802154.h
mip6.h
mld.h
mpls.h
mpls_iptunnel.h
mrp.h
ncsi.h
ndisc.h	net: avoid potential false sharing in neighbor related code	2019-12-31 16:45:03 +01:00
neighbour.h	Exempt multicast addresses from five-second neighbor lifetime	2020-11-24 13:28:56 +01:00
net_failover.h
net_namespace.h	ipv6: Use global sernum for dst validation with nexthop objects	2020-05-14 07:58:20 +02:00
net_ratelimit.h
netevent.h
netlabel.h
netlink.h	netlink: Fix nlmsg_parse as a wrapper for strict message parsing	2019-08-13 20:37:16 -07:00
netprio_cgroup.h
netrom.h
nexthop.h	ipv4: nexthop version of fib_info_nh_uses_dev	2020-06-03 08:21:37 +02:00
nl802154.h
nsh.h
p8022.h
page_pool.h	page_pool: do not release pool until inflight == 0.	2019-12-18 16:09:07 +01:00
ping.h
pkt_cls.h	net_sched: fix ops->bind_class() implementations	2020-02-01 09:34:38 +00:00
pkt_sched.h	sched: consistently handle layer3 header accesses in the presence of VLANs	2020-07-22 09:32:48 +02:00
pptp.h
protocol.h
psample.h	net: sched: take reference to psample group in flow_action infra	2019-09-16 09:18:03 +02:00
psnap.h
raw.h
rawv6.h
red.h	net: sched: prevent invalid Scell_log shift count	2021-01-12 20:16:14 +01:00
regulatory.h
request_sock.h	net: add {READ|WRITE}_ONCE() annotations on ->rskq_accept_head	2019-10-09 21:34:31 -07:00
rose.h
route.h	ipv4: Revert removal of rt_uses_gateway	2019-09-20 18:23:33 -07:00
rsi_91x.h
rtnetlink.h
rtnh.h
sch_generic.h	net: sched: replaced invalid qdisc tree flush helper in qdisc_replace	2021-02-10 09:25:33 +01:00
scm.h
secure_seq.h
seg6.h
seg6_hmac.h
seg6_local.h
slhc_vj.h
smc.h
snmp.h
sock.h	net: silence data-races on sk_backlog.tail	2020-10-01 13:17:15 +02:00
sock_reuseport.h	udp: correct reuseport selection with connected sockets	2019-09-16 09:02:18 +02:00
Space.h
stp.h
strparser.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
switchdev.h
tcp.h	tcp: fix SO_RCVLOWAT related hangs under mem pressure	2021-03-04 10:26:17 +01:00
tcp_states.h
timewait_sock.h
tipc.h
tls.h	net/tls: Protect from calling tls_dev_del for TLS RX twice	2020-12-08 10:40:23 +01:00
transp_v6.h
tso.h
tun_proto.h
udp.h	udp: document udp_rcv_segment special case for looped packets	2020-05-10 10:31:33 +02:00
udp_tunnel.h
udplite.h
vsock_addr.h
vxlan.h	vxlan: add adjacent link to limit depth level	2019-10-24 14:53:49 -07:00
wext.h
wimax.h
x25.h
x25device.h
xdp.h	xdp: page_pool related fix to cpumap	2019-06-19 11:23:13 -04:00
xdp_priv.h	page_pool: do not release pool until inflight == 0.	2019-12-18 16:09:07 +01:00
xdp_sock.h	xsk: add support to allow unaligned chunk placement	2019-08-31 01:08:26 +02:00
xfrm.h	xfrm: clone XFRMA_REPLAY_ESN_VAL in xfrm_do_migrate	2020-10-14 10:33:02 +02:00