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Pedro Tammela 78a0900e8d net/sched: make psched_mtu() RTNL-less safe 
[ Upstream commit 150e33e62c1fa4af5aaab02776b6c3812711d478 ]

Eric Dumazet says[1]:
-------
Speaking of psched_mtu(), I see that net/sched/sch_pie.c is using it
without holding RTNL, so dev->mtu can be changed underneath.
KCSAN could issue a warning.
-------

Annotate dev->mtu with READ_ONCE() so KCSAN don't issue a warning.

[1] https://lore.kernel.org/all/CANn89iJoJO5VtaJ-2=_d2aOQhb0Xw8iBT_Cxqp2HyuS-zj6azw@mail.gmail.com/

v1 -> v2: Fix commit message

Fixes: d4b36210c2e6 ("net: pkt_sched: PIE AQM scheme")
Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20230711021634.561598-1-pctammela@mojatatu.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-07-23 13:47:45 +02:00
..
9p
9p: Add client parameter to p9_req_put()
2022-08-17 14:24:07 +02:00
bluetooth
Bluetooth: L2CAP: Fix use-after-free caused by l2cap_chan_put
2022-08-03 12:03:40 +02:00
caif
net: remove the caif_hsi driver
2021-07-01 13:19:48 -07:00
iucv
net/af_iucv: don't track individual TX skbs for TRANS_HIPER sockets
2021-01-28 20:36:21 -08:00
netfilter
netfilter: nf_tables: drop map element references from preparation phase
2023-07-23 13:46:44 +02:00
netns
Remove DECnet support from kernel
2023-06-21 15:59:15 +02:00
nfc
NFC: add NCI_UNREG flag to eliminate the race
2021-11-25 09:48:40 +01:00
phonet
…
sctp
sctp: add a refcnt in sctp_stream_priorities to avoid a nested loop
2023-03-11 13:57:28 +01:00
tc_act
net/sched: transition act_pedit to rcu and percpu stats
2023-03-11 13:57:29 +01:00
6lowpan.h
6lowpan: Replace zero-length array with flexible-array member
2020-02-28 14:51:30 +01:00
act_api.h
net_sched: refactor TC action init API
2021-08-02 10:24:38 +01:00
addrconf.h
ipv6/addrconf: fix a null-ptr-deref bug for ip6_ptr
2022-08-03 12:03:47 +02:00
af_ieee802154.h
…
af_rxrpc.h
afs: Don't truncate iter during data fetch
2021-04-23 10:17:26 +01:00
af_unix.h
af_unix: Add unix_stream_proto for sockmap
2021-08-16 18:43:39 -07:00
af_vsock.h
vsock: each transport cycles only on its own sockets
2022-03-23 09:16:41 +01:00
ah.h
…
arp.h
ipv4: Invalidate neighbour for broadcast address upon address addition
2022-04-13 20:59:05 +02:00
atmclip.h
…
ax25.h
ax25: fix reference count leaks of ax25_dev
2022-04-20 09:34:22 +02:00
ax88796.h
ax88796: export ax_NS8390_init() hook
2021-08-03 13:05:25 +01:00
bareudp.h
bareudp: Reverted support to enable & disable rx metadata collection
2020-07-21 18:30:47 -07:00
bond_3ad.h
net: bonding: Share lacpdu_mcast_addr definition
2022-09-28 11:11:48 +02:00
bond_alb.h
bonding (gcc13): synchronize bond_{a,t}lb_xmit() types
2023-06-14 11:13:00 +02:00
bond_options.h
Bonding: add arp_missed_max option
2023-06-05 09:21:19 +02:00
bonding.h
bonding: fix send_peer_notif overflow
2023-06-05 09:21:19 +02:00
bpf_sk_storage.h
bpf: struct sock is declared twice in bpf_sk_storage header
2021-03-26 17:43:55 +01:00
busy_poll.h
net: Fix a data-race around sysctl_net_busy_poll.
2022-08-31 17:16:43 +02:00
calipso.h
…
cfg80211-wext.h
…
cfg80211.h
cfg80211: fix management registrations locking
2021-10-25 15:20:22 +02:00
cfg802154.h
cfg802154: Replace zero-length array with flexible-array member
2020-02-29 14:39:08 +01:00
checksum.h
net: Force inlining of checksum functions in net/checksum.h
2022-03-02 11:47:58 +01:00
cipso_ipv4.h
cipso: Remove unused inline functions
2020-07-15 07:45:24 -07:00
cls_cgroup.h
bpf: Allow to retrieve cgroup v1 classid from v2 hooks
2020-03-27 19:40:38 -07:00
codel_impl.h
…
codel_qdisc.h
…
codel.h
…
compat.h
net/ipv4/ipv6: Replace one-element arraya with flexible-array members
2021-08-05 11:46:42 +01:00
datalink.h
…
dcbevent.h
…
dcbnl.h
…
devlink.h
devlink: Use xarray to store devlink instances
2021-08-14 13:59:10 +01:00
dsa.h
net: dsa: introduce helpers for iterating through ports using dp
2023-06-05 09:21:17 +02:00
dsfield.h
ipv6: Annotate bitwise IPv6 dsfield pointer cast
2019-12-16 16:09:44 -08:00
dst_cache.h
wireguard: device: reset peer src endpoint when netns exits
2021-12-08 09:04:46 +01:00
dst_metadata.h
net: fix a memleak when uncloning an skb dst and its metadata
2022-02-16 12:56:30 +01:00
dst_ops.h
net/dst: use a smaller percpu_counter batch for dst entries accounting
2020-05-08 21:33:33 -07:00
dst.h
net: Remove unused inline function dst_hold_and_use()
2023-06-21 15:59:19 +02:00
erspan.h
erspan: Add type I version 0 support.
2020-05-05 13:23:29 -07:00
esp.h
esp: limit skb_page_frag_refill use to a single page
2022-04-27 14:38:52 +02:00
espintcp.h
xfrm: espintcp: save and call old ->sk_destruct
2020-04-20 07:34:16 +02:00
ethoc.h
…
failover.h
…
fib_notifier.h
ipv6: Remove old route notifications and convert listeners
2019-12-24 22:37:30 -08:00
fib_rules.h
ipv6: fix memory leak in fib6_rule_suppress
2021-12-08 09:04:43 +01:00
firewire.h
…
flow_dissector.h
net/sched: flower: fix parsing of ethertype following VLAN header
2022-04-20 09:34:09 +02:00
flow_offload.h
netfilter: nf_tables: bail out early if hardware offload is not supported
2022-06-14 18:36:17 +02:00
flow.h
net: Remove DECnet leftovers from flow.h.
2023-06-21 15:59:19 +02:00
fou.h
…
fq_impl.h
net/fq_impl: do not maintain a backlog-sorted list of flows
2021-01-21 13:33:45 +01:00
fq.h
net/fq_impl: do not maintain a backlog-sorted list of flows
2021-01-21 13:33:45 +01:00
garp.h
treewide: Use sizeof_field() macro
2019-12-09 10:36:44 -08:00
gen_stats.h
net_sched: extend packet counter to 64bit
2019-11-05 18:20:55 -08:00
genetlink.h
mptcp: avoid lock_fast usage in accept path
2021-02-12 16:31:46 -08:00
geneve.h
…
gre.h
ip_gre: add csum offload support for gre header
2021-01-29 20:39:14 -08:00
gro_cells.h
…
gro.h
gro: add combined call_gro_receive() + INDIRECT_CALL_INET() helper
2021-03-18 19:51:12 -07:00
gtp.h
…
gue.h
GUE: Fix a typo
2020-06-22 21:12:44 -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
ipv6: ICMPV6: add response to ICMPV6 RFC 8335 PROBE messages
2021-06-28 14:29:45 -07:00
ieee80211_radiotap.h
mac80211: Use flex-array for radiotap header bitmap
2021-08-13 09:58:25 +02:00
ieee802154_netdev.h
net: ieee802154: return -EINVAL for unknown addr type
2022-10-26 12:35:54 +02:00
if_inet6.h
ipv6: fix locking issues with loops over idev->addr_list
2022-06-09 10:22:31 +02:00
ife.h
…
ila.h
…
inet6_connection_sock.h
…
inet6_hashtables.h
net: allow unbound socket for packets in VRF when tcp_l3mdev_accept set
2022-08-17 14:23:36 +02:00
inet_common.h
bpf: Allow rewriting to ports under ip_unprivileged_port_start
2021-01-27 18:18:15 -08:00
inet_connection_sock.h
Revert "tcp: change pingpong threshold to 3"
2022-08-03 12:03:45 +02:00
inet_ecn.h
inet_ecn: Use csum16_add() helper for IP_ECN_set_* helpers
2020-12-14 18:38:58 -08:00
inet_frag.h
inet: frags: annotate races around fqdir->dead and fqdir->high_thresh
2022-01-27 11:05:35 +01:00
inet_hashtables.h
net: allow unbound socket for packets in VRF when tcp_l3mdev_accept set
2022-08-17 14:23:36 +02:00
inet_sock.h
net: allow unbound socket for packets in VRF when tcp_l3mdev_accept set
2022-08-17 14:23:36 +02:00
inet_timewait_sock.h
tcp: honor SO_PRIORITY in TIME_WAIT state
2019-09-27 12:05:02 +02:00
inetpeer.h
…
ioam6.h
ipv6: ioam: Support for IOAM injection with lwtunnels
2021-07-21 08:14:33 -07:00
ip6_checksum.h
tcp: remove indirect calls for icsk->icsk_af_ops->send_check
2020-06-20 17:47:53 -07:00
ip6_fib.h
ipv6: fix data-race in fib6_info_hw_flags_set / fib6_purge_rt
2022-02-23 12:03:10 +01:00
ip6_route.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-08-05 15:08:47 -07:00
ip6_tunnel.h
ip_gre, ip6_gre: Fix race condition on o_seqno in collect_md mode
2022-05-09 09:14:36 +02:00
ip_fib.h
ipv4: convert fib_num_tclassid_users to atomic_t
2021-12-08 09:04:49 +01:00
ip_tunnels.h
ip_tunnels: allow VXLAN/GENEVE to inherit TOS/TTL from VLAN
2023-06-28 10:29:44 +02:00
ip_vs.h
ipvs: Update width of source for ip_vs_sync_conn_options
2023-05-24 17:36:46 +01:00
ip.h
ipv{4,6}/raw: fix output xfrm lookup wrt protocol
2023-06-05 09:21:26 +02:00
ipcomp.h
…
ipconfig.h
…
ipv6_frag.h
inet: frags: annotate races around fqdir->dead and fqdir->high_thresh
2022-01-27 11:05:35 +01:00
ipv6_stubs.h
net: ipv6: add fib6_nh_release_dsts stub
2021-12-01 09:04:49 +01:00
ipv6.h
tcp/udp: Call inet6_destroy_sock() in IPv6 sk->sk_destruct().
2023-04-26 13:51:54 +02:00
iw_handler.h
…
kcm.h
…
l3mdev.h
l3mdev: add infrastructure for table to VRF mapping
2020-06-20 17:22:22 -07:00
lag.h
…
lapb.h
net: lapb: Make "lapb_t1timer_running" able to detect an already running timer
2021-03-23 14:14:50 -07:00
lib80211.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
net: llc: fix skb_over_panic
2021-07-27 13:05:56 +01:00
llc_s_ac.h
…
llc_s_ev.h
…
llc_s_st.h
…
llc_sap.h
…
llc.h
llc: fix out-of-bound array index in llc_sk_dev_hash()
2021-11-18 19:17:10 +01:00
lwtunnel.h
netfilter: add netfilter hooks to SRv6 data plane
2021-08-30 01:51:36 +02:00
mac80211.h
mac80211: Fix Ptk0 rekey documentation
2021-09-27 12:02:54 +02:00
mac802154.h
…
macsec.h
net: macsec: fix the length used to copy the key for offloading
2021-06-24 12:41:12 -07:00
mctp.h
mctp: unify sockaddr_mctp types
2021-10-18 13:47:09 +01:00
mctpdevice.h
mctp: Remove the repeated declaration
2021-08-25 11:23:14 +01:00
mip6.h
net: mip6: Replace zero-length array with flexible-array member
2020-03-02 11:16:27 -08:00
mld.h
mld: add new workqueues for process mld events
2021-03-26 15:14:56 -07:00
mpls_iptunnel.h
net: mpls: Replace zero-length array with flexible-array member
2020-02-28 12:08:37 -08:00
mpls.h
net: Make mpls_entry_encode() available for generic users
2020-05-29 21:20:20 -07:00
mptcp.h
mptcp: remove MPTCP 'ifdef' in TCP SYN cookies
2023-01-12 11:58:52 +01:00
mrp.h
mrp: introduce active flags to prevent UAF when applicant uninit
2022-12-31 13:14:42 +01:00
ncsi.h
…
ndisc.h
ipv6: fix skb drops in igmp6_event_query() and igmp6_event_report()
2022-03-08 19:12:33 +01:00
neighbour.h
neighbour: delete neigh_lookup_nodev as not used
2023-06-21 15:59:19 +02:00
net_failover.h
…
net_namespace.h
net: initialize init_net earlier
2022-04-13 20:59:03 +02:00
net_ratelimit.h
…
netevent.h
…
netlabel.h
…
netlink.h
net: netlink: add the case when nlh is NULL
2021-07-27 11:43:50 +01:00
netprio_cgroup.h
netprio: use css ID instead of cgroup ID
2019-11-12 08:18:03 -08:00
netrom.h
…
nexthop.h
net: ipv4: Fix rtnexthop len when RTA_FLOW is present
2021-09-24 14:07:10 +01:00
nl802154.h
net: ieee802154: handle iftypes as u32
2021-12-01 09:04:46 +01:00
nsh.h
…
p8022.h
…
page_pool.h
page_pool: fix inconsistency for page_pool_ring_[un]lock()
2023-06-05 09:21:22 +02:00
pie.h
pie: realign comment
2020-03-04 13:25:55 -08:00
ping.h
…
pkt_cls.h
sch_htb: Fix inconsistency when leaf qdisc creation fails
2021-08-30 16:33:59 -07:00
pkt_sched.h
net/sched: make psched_mtu() RTNL-less safe
2023-07-23 13:47:45 +02:00
pptp.h
…
protocol.h
tcp/udp: Make early_demux back namespacified.
2022-11-10 18:15:38 +01:00
psample.h
psample: Add a fwd declaration for skbuff
2021-08-09 15:34:21 -07:00
psnap.h
…
raw.h
raw: Fix a data-race around sysctl_raw_l3mdev_accept.
2022-07-21 21:24:27 +02:00
rawv6.h
…
red.h
sch_red: fix off-by-one checks in red_check_params()
2021-03-25 17:40:43 -07:00
regulatory.h
net/wireless: regulatory.h: drop duplicate word in comment
2020-07-31 09:24:23 +02:00
request_sock.h
tcp: bpf: Optionally store mac header in TCP_SAVE_SYN
2020-08-24 14:35:00 -07:00
rose.h
…
route.h
ip: Fix data-races around sysctl_ip_default_ttl.
2022-07-29 17:25:09 +02:00
rpl.h
ipv6: rpl: Fix Route of Death.
2023-06-14 11:13:02 +02:00
rsi_91x.h
…
rtnetlink.h
net: add extack arg for link ops
2021-08-04 10:01:26 +01:00
rtnh.h
…
sch_generic.h
net/sched: sch_taprio: fix possible use-after-free
2023-02-01 08:27:09 +01:00
scm.h
scm: fix MSG_CTRUNC setting condition for SO_PASSSEC
2023-05-11 23:00:26 +09:00
secure_seq.h
secure_seq: use the 64 bits of the siphash for port offset calculation
2022-05-18 10:26:53 +02:00
seg6_hmac.h
…
seg6_local.h
…
seg6.h
udp6: Use Segment Routing Header for dest address if present
2022-01-27 11:05:05 +01:00
selftests.h
net: selftest: fix build issue if INET is disabled
2021-04-28 14:06:45 -07:00
slhc_vj.h
…
smc.h
net/smc: introduce CHID callback for ISM devices
2020-09-28 15:19:03 -07:00
snmp.h
net/tls: add skeleton of MIB statistics
2019-10-05 16:29:00 -07:00
sock_reuseport.h
soreuseport: Fix socket selection for SO_INCOMING_CPU.
2022-12-31 13:14:07 +01:00
sock.h
netlink: Add __sock_i_ino() for __netlink_diag_dump().
2023-07-23 13:46:56 +02:00
Space.h
wan: remove sbni/granch driver
2021-08-03 13:05:26 +01:00
stp.h
…
strparser.h
bpf, sockmap: sk_skb data_end access incorrect when src_reg = dst_reg
2021-11-18 19:17:11 +01:00
switchdev.h
net: make switchdev_bridge_port_{,unoffload} loosely coupled with the bridge
2021-08-04 12:35:07 +01:00
tcp_states.h
…
tcp.h
bpf, sockmap: Fix missing BPF_F_INGRESS flag when using apply_bytes
2022-12-31 13:14:14 +01:00
timewait_sock.h
…
tipc.h
…
tls_toe.h
net/tls: rename tls_hw_* functions tls_toe_*
2019-10-04 14:07:07 -07:00
tls.h
net/tls: Check for errors in tls_device_init
2022-07-21 21:24:31 +02:00
transp_v6.h
tcp: move ipv4_specific to tcp include file
2020-06-23 20:10:15 -07:00
tso.h
net: tso: cache transport header length
2020-06-18 20:46:23 -07:00
tun_proto.h
…
udp_tunnel.h
rxrpc: Fix ICMP/ICMP6 error handling
2022-09-15 11:30:05 +02:00
udp.h
tcp/udp: Call inet6_destroy_sock() in IPv6 sk->sk_destruct().
2023-04-26 13:51:54 +02:00
udplite.h
tcp/udp: Call inet6_destroy_sock() in IPv6 sk->sk_destruct().
2023-04-26 13:51:54 +02:00
vsock_addr.h
vsock: remove include/linux/vm_sockets.h file
2019-11-14 18:12:17 -08:00
vxlan.h
net: sched: only keep the available bits when setting vxlan md->gbp
2020-09-14 16:49:39 -07:00
wext.h
…
x25.h
net/x25: add new state X25_STATE_5
2019-12-09 10:28:43 -08:00
x25device.h
…
xdp_priv.h
page_pool: do not release pool until inflight == 0.
2019-11-16 12:39:10 -08:00
xdp_sock_drv.h
i40e: xsk: Move tmp desc array from driver to pool
2022-06-14 18:36:18 +02:00
xdp_sock.h
xdp: Add proper __rcu annotations to redirect map entries
2021-06-24 19:41:15 +02:00
xdp.h
xdp: Allow registering memory model without rxq reference
2023-06-05 09:21:21 +02:00
xfrm.h
xfrm: Treat already-verified secpath entries as optional
2023-06-28 10:29:45 +02:00
xsk_buff_pool.h
xsk: Fix unaligned descriptor validation
2023-05-11 23:00:27 +09:00