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Xin Long cec326443f sctp: add a refcnt in sctp_stream_priorities to avoid a nested loop 
[ Upstream commit 68ba44639537de6f91fe32783766322d41848127 ]

With this refcnt added in sctp_stream_priorities, we don't need to
traverse all streams to check if the prio is used by other streams
when freeing one stream's prio in sctp_sched_prio_free_sid(). This
can avoid a nested loop (up to 65535 * 65535), which may cause a
stuck as Ying reported:

    watchdog: BUG: soft lockup - CPU#23 stuck for 26s! [ksoftirqd/23:136]
    Call Trace:
     <TASK>
     sctp_sched_prio_free_sid+0xab/0x100 [sctp]
     sctp_stream_free_ext+0x64/0xa0 [sctp]
     sctp_stream_free+0x31/0x50 [sctp]
     sctp_association_free+0xa5/0x200 [sctp]

Note that it doesn't need to use refcount_t type for this counter,
as its accessing is always protected under the sock lock.

v1->v2:
 - add a check in sctp_sched_prio_set to avoid the possible prio_head
   refcnt overflow.

Fixes: 9ed7bfc79542 ("sctp: fix memory leak in sctp_stream_outq_migrate()")
Reported-by: Ying Xu <yinxu@redhat.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Link: https://lore.kernel.org/r/825eb0c905cb864991eba335f4a2b780e543f06b.1677085641.git.lucien.xin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-03-11 16:44:11 +01:00
..
9p
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 188
2019-05-30 11:29:21 -07:00
bluetooth
Bluetooth: L2CAP: Fix use-after-free caused by l2cap_chan_put
2022-08-03 11:59:37 +02:00
caif
net: caif: add proper error handling
2021-06-10 13:37:09 +02:00
iucv
…
netfilter
netfilter: conntrack: re-fetch conntrack after insertion
2022-06-06 08:33:50 +02:00
netns
ipv4: convert fib_num_tclassid_users to atomic_t
2021-12-08 09:01:12 +01:00
nfc
NFC: add NCI_UNREG flag to eliminate the race
2021-12-01 09:23:35 +01:00
phonet
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 336
2019-06-05 17:37:07 +02:00
sctp
sctp: add a refcnt in sctp_stream_priorities to avoid a nested loop
2023-03-11 16:44:11 +01:00
tc_act
net/sched: act_pedit: really ensure the skb is writable
2022-05-18 09:47:25 +02:00
6lowpan.h
…
act_api.h
net: sched: fix police ext initialization
2021-03-04 10:26:53 +01:00
addrconf.h
ipv6/addrconf: fix a null-ptr-deref bug for ip6_ptr
2022-08-03 11:59:39 +02:00
af_ieee802154.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
2019-05-30 11:26:41 -07:00
af_rxrpc.h
rxrpc: Make rxrpc_kernel_get_srtt() indicate validity
2020-09-09 19:12:23 +02:00
af_unix.h
net: split out functions related to registering inflight socket files
2019-02-28 08:24:23 -07:00
af_vsock.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 321
2019-06-05 17:37:05 +02:00
ah.h
…
arp.h
ipv4: Invalidate neighbour for broadcast address upon address addition
2022-04-15 14:18:33 +02:00
atmclip.h
…
ax25.h
ax25: fix reference count leaks of ax25_dev
2022-04-20 09:19:39 +02:00
ax88796.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
bond_3ad.h
bonding: fix data-races around agg_select_timer
2022-02-23 11:59:58 +01:00
bond_alb.h
bonding: make tx_rebalance_counter an atomic
2021-12-14 14:49:00 +01:00
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: Rename slave_arr to usable_slaves
2023-01-18 11:41:05 +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: Fix a data-race around sysctl_net_busy_poll.
2022-09-05 10:27:42 +02:00
calipso.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00
cfg80211-wext.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
cfg80211.h
mac80211: properly handle A-MSDUs that start with an RFC 1042 header
2021-06-03 08:59:01 +02:00
cfg802154.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
2019-05-30 11:26:41 -07:00
checksum.h
net: Force inlining of checksum functions in net/checksum.h
2022-03-02 11:41:08 +01:00
cipso_ipv4.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00
cls_cgroup.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
codel_impl.h
…
codel_qdisc.h
…
codel.h
…
compat.h
net: rework SIOCGSTAMP ioctl handling
2019-04-19 14:07:40 -07:00
datalink.h
…
dcbevent.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201
2019-05-30 11:29:52 -07:00
dcbnl.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201
2019-05-30 11:29:52 -07:00
devlink.h
devlink: disallow reload operation during device cleanup
2019-11-09 19:38:36 -08:00
dn_dev.h
…
dn_fib.h
…
dn_neigh.h
…
dn_nsp.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 24
2019-05-21 11:52:39 +02:00
dn_route.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 24
2019-05-21 11:52:39 +02:00
dn.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_cache.h
…
dst_metadata.h
net: fix a memleak when uncloning an skb dst and its metadata
2022-02-16 12:52:51 +01:00
dst_ops.h
net: add bool confirm_neigh parameter for dst_ops.update_pmtu
2020-01-04 19:18:58 +01:00
dst.h
net: add atomic_long_t to net_device_stats fields
2023-01-18 11:41:37 +01:00
erspan.h
…
esp.h
esp: limit skb_page_frag_refill use to a single page
2022-07-12 16:30:45 +02:00
ethoc.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
failover.h
…
fib_notifier.h
net: fib: drop include of module.h from fib_notifier.h
2019-04-22 21:50:53 -07:00
fib_rules.h
ipv6: fix memory leak in fib6_rule_suppress
2021-12-08 09:01:13 +01:00
firewire.h
…
flow_dissector.h
net/sched: flower: fix parsing of ethertype following VLAN header
2022-04-20 09:19:34 +02:00
flow_offload.h
net: core: rename indirect block ingress cb function
2019-12-18 16:08:47 +01:00
flow.h
ipv4: Initialize flowi4_multipath_hash in data path
2020-09-26 18:03:12 +02:00
fou.h
…
fq_impl.h
net/fq_impl: Switch to kvmalloc() for memory allocation
2019-11-08 09:11:49 +01:00
fq.h
net/flow_dissector: switch to siphash
2019-10-23 20:13:22 -07:00
garp.h
…
gen_stats.h
…
genetlink.h
genetlink: remove genl_bind
2020-07-22 09:32:46 +02:00
geneve.h
net: Move the definition of the default Geneve udp port to public header file
2019-03-22 12:09:31 -07:00
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
net: icmp: pass zeroed opts from icmp{,v6}_ndo_send before sending
2021-03-04 10:26:53 +01:00
ieee80211_radiotap.h
wireless-drivers-next patches for 5.1
2019-02-22 12:56:24 -08:00
ieee802154_netdev.h
net: ieee802154: return -EINVAL for unknown addr type
2022-10-26 13:22:59 +02:00
if_inet6.h
ipv6: fix locking issues with loops over idev->addr_list
2022-06-14 18:11:25 +02:00
ife.h
net: ife: drop include of module.h from net/ife.h
2019-04-22 21:50:53 -07:00
ila.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
inet6_connection_sock.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
inet6_hashtables.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
inet_common.h
inet: factor out inet_send_prepare()
2019-07-03 13:51:54 -07:00
inet_connection_sock.h
tcp: relookup sock for RST+ACK packets handled by obsolete req sock
2021-03-30 14:35:26 +02:00
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: annotate races around fqdir->dead and fqdir->high_thresh
2022-01-27 09:19:54 +01:00
inet_hashtables.h
secure_seq: use the 64 bits of the siphash for port offset calculation
2022-06-06 08:33:49 +02:00
inet_sock.h
tcp/dccp: Fix a data-race around sysctl_tcp_fwmark_accept.
2022-07-29 17:14:11 +02:00
inet_timewait_sock.h
tcp: honor SO_PRIORITY in TIME_WAIT state
2019-09-27 12:05:02 +02:00
inetpeer.h
net: ipv4: use a dedicated counter for icmp_v4 redirect packets
2019-02-08 21:50:15 -08:00
ip6_checksum.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
ip6_fib.h
ipv6: annotate accesses to fn->fn_sernum
2022-02-01 17:24:38 +01:00
ip6_route.h
net: ipv6: fix returned variable type in ip6_skb_dst_mtu
2021-08-12 13:20:57 +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: convert fib_num_tclassid_users to atomic_t
2021-12-08 09:01:12 +01:00
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
ip.h
ip: Fix a data-race around sysctl_fwmark_reflect.
2022-07-29 17:14:11 +02:00
ipcomp.h
…
ipconfig.h
…
ipv6_frag.h
inet: frags: annotate races around fqdir->dead and fqdir->high_thresh
2022-01-27 09:19:54 +01:00
ipv6_stubs.h
net: ipv6: add fib6_nh_release_dsts stub
2021-12-01 09:23:33 +01:00
ipv6.h
net: ipv6: add net argument to ip6_dst_lookup_flow
2019-12-18 16:08:40 +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
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
lag.h
…
lapb.h
…
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
2021-08-04 12:27:39 +02:00
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()
2021-11-17 09:48:47 +01:00
lwtunnel.h
lwtunnel: Pass encap and encap type attributes to lwtunnel_fill_encap
2019-04-23 19:42:29 -07:00
mac80211.h
mac80211: populate debugfs only after cfg80211 init
2020-04-29 16:33:18 +02:00
mac802154.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
2019-05-30 11:26:41 -07:00
mip6.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00
mld.h
…
mpls_iptunnel.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295
2019-06-05 17:36:38 +02:00
mpls.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295
2019-06-05 17:36:38 +02:00
mrp.h
mrp: introduce active flags to prevent UAF when applicant uninit
2023-01-18 11:41:37 +01:00
ncsi.h
…
ndisc.h
net: avoid potential false sharing in neighbor related code
2019-12-31 16:45:03 +01:00
neighbour.h
net, neigh: Enable state migration between NUD_PERMANENT and NTF_USE
2021-11-17 09:48:49 +01:00
net_failover.h
…
net_namespace.h
net: make get_net_ns return error if NET_NS is disabled
2021-06-23 14:41:25 +02:00
net_ratelimit.h
…
netevent.h
…
netlabel.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00
netlink.h
netlink: Fix nlmsg_parse as a wrapper for strict message parsing
2019-08-13 20:37:16 -07:00
netprio_cgroup.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
netrom.h
net: netrom: Fix error cleanup path of nr_proto_init
2019-04-11 13:59:49 -07:00
nexthop.h
net: ipv4: Fix rtnexthop len when RTA_FLOW is present
2021-10-06 15:42:33 +02:00
nl802154.h
net: ieee802154: handle iftypes as u32
2021-12-01 09:23:32 +01:00
nsh.h
…
p8022.h
…
page_pool.h
mm: fix struct page layout on 32-bit systems
2021-05-19 10:08:31 +02:00
ping.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
pkt_cls.h
net_sched: fix ops->bind_class() implementations
2020-02-01 09:34:38 +00:00
pkt_sched.h
net: prevent user from passing illegal stab size
2021-10-17 10:42:34 +02:00
pptp.h
…
protocol.h
tcp/udp: Make early_demux back namespacified.
2022-11-10 17:57:55 +01:00
psample.h
psample: Add a fwd declaration for skbuff
2021-08-18 08:56:59 +02:00
psnap.h
…
raw.h
raw: Fix a data-race around sysctl_raw_l3mdev_accept.
2022-07-21 20:59:22 +02:00
rawv6.h
…
red.h
sch_red: fix off-by-one checks in red_check_params()
2021-04-14 08:24:14 +02:00
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: remove sparse error in ip_neigh_gw4()
2022-02-01 17:24:39 +01:00
rsi_91x.h
…
rtnetlink.h
can: dev: Move device back to init netns on owning netns delete
2021-03-30 14:35:29 +02:00
rtnh.h
net: Rename net/nexthop.h net/rtnh.h
2019-04-22 21:47:25 -07:00
sch_generic.h
net/sched: sch_taprio: fix possible use-after-free
2023-02-06 07:52:37 +01:00
scm.h
…
secure_seq.h
secure_seq: use the 64 bits of the siphash for port offset calculation
2022-06-06 08:33:49 +02:00
seg6_hmac.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
seg6_local.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
seg6.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
slhc_vj.h
…
smc.h
net/smc: add smcd support to the pnet table
2019-02-21 10:34:37 -08:00
snmp.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
sock_reuseport.h
udp: correct reuseport selection with connected sockets
2019-09-16 09:02:18 +02:00
sock.h
net: add sock_init_data_uid()
2023-03-11 16:43:40 +01:00
Space.h
…
stp.h
…
strparser.h
bpf: sockmap, strparser, and tls are reusing qdisc_skb_cb and colliding
2021-11-17 09:48:48 +01:00
switchdev.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tcp_states.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tcp.h
tcp/udp: Make early_demux back namespacified.
2022-11-10 17:57:55 +01:00
timewait_sock.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tipc.h
…
tls.h
net/tls: Fix flipped sign in tls_err_abort() calls
2021-11-02 19:46:12 +01:00
transp_v6.h
…
tso.h
…
tun_proto.h
…
udp_tunnel.h
udp: call udp_encap_enable for v6 sockets when enabling encap
2022-04-15 14:18:01 +02:00
udp.h
tcp/udp: Make early_demux back namespacified.
2022-11-10 17:57:55 +01:00
udplite.h
…
vsock_addr.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 321
2019-06-05 17:37:05 +02:00
vxlan.h
vxlan: add adjacent link to limit depth level
2019-10-24 14:53:49 -07:00
wext.h
…
wimax.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 268
2019-06-05 17:30:29 +02:00
x25.h
…
x25device.h
…
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
xdp.h
xdp: page_pool related fix to cpumap
2019-06-19 11:23:13 -04:00
xfrm.h
xfrm: Check if_id in xfrm_migrate
2022-03-19 13:40:16 +01:00