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Vlad Buslov 6ee3728ae8 net/sched: cls_api: Fix lockup on flushing explicitly created chain 
[ Upstream commit c9a82bec02c339cdda99b37c5e62b3b71fc4209c ]

Mingshuai Ren reports:

When a new chain is added by using tc, one soft lockup alarm will be
 generated after delete the prio 0 filter of the chain. To reproduce
 the problem, perform the following steps:
(1) tc qdisc add dev eth0 root handle 1: htb default 1
(2) tc chain add dev eth0
(3) tc filter del dev eth0 chain 0 parent 1: prio 0
(4) tc filter add dev eth0 chain 0 parent 1:

Fix the issue by accounting for additional reference to chains that are
explicitly created by RTM_NEWCHAIN message as opposed to implicitly by
RTM_NEWTFILTER message.

Fixes: 726d061286ce ("net: sched: prevent insertion of new classifiers during chain flush")
Reported-by: Mingshuai Ren <renmingshuai@huawei.com>
Closes: https://lore.kernel.org/lkml/87legswvi3.fsf@nvidia.com/T/
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Link: https://lore.kernel.org/r/20230612093426.2867183-1-vladbu@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-06-21 15:45:40 +02:00
..
act_api.c
net/sched: act_api: Notify user space if any actions were flushed before error
2022-07-07 17:52:18 +02:00
act_bpf.c
flow_offload: fill flags to action structure
2023-02-22 12:55:59 +01:00
act_connmark.c
flow_offload: fill flags to action structure
2023-02-22 12:55:59 +01:00
act_csum.c
net_sched: defer tcf_idr_insert() in tcf_action_init_1()
2020-09-24 19:46:21 -07:00
act_ct.c
netfilter: conntrack: Fix data-races around ct mark
2022-12-02 17:40:00 +01:00
act_ctinfo.c
net/sched: act_ctinfo: use percpu stats
2023-02-22 12:55:59 +01:00
act_gact.c
net_sched: defer tcf_idr_insert() in tcf_action_init_1()
2020-09-24 19:46:21 -07:00
act_gate.c
flow_offload: fill flags to action structure
2023-02-22 12:55:59 +01:00
act_ife.c
flow_offload: fill flags to action structure
2023-02-22 12:55:59 +01:00
act_ipt.c
flow_offload: fill flags to action structure
2023-02-22 12:55:59 +01:00
act_meta_mark.c
…
act_meta_skbprio.c
…
act_meta_skbtcindex.c
…
act_mirred.c
act_mirred: use the backlog for nested calls to mirred ingress
2023-05-30 12:57:56 +01:00
act_mpls.c
flow_offload: fill flags to action structure
2023-02-22 12:55:59 +01:00
act_nat.c
flow_offload: fill flags to action structure
2023-02-22 12:55:59 +01:00
act_pedit.c
flow_offload: fill flags to action structure
2023-02-22 12:55:59 +01:00
act_police.c
flow_offload: fill flags to action structure
2023-02-22 12:55:59 +01:00
act_sample.c
net/sched: act_sample: fix action bind logic
2023-03-11 16:40:13 +01:00
act_simple.c
flow_offload: fill flags to action structure
2023-02-22 12:55:59 +01:00
act_skbedit.c
flow_offload: fill flags to action structure
2023-02-22 12:55:59 +01:00
act_skbmod.c
flow_offload: fill flags to action structure
2023-02-22 12:55:59 +01:00
act_tunnel_key.c
net/sched: act_tunnel_key: fix OOB write in case of IPv6 ERSPAN tunnels
2020-10-20 21:10:41 -07:00
act_vlan.c
net/sched: act_vlan: Fix modify to allow 0
2021-07-14 16:56:19 +02:00
cls_api.c
net/sched: cls_api: Fix lockup on flushing explicitly created chain
2023-06-21 15:45:40 +02:00
cls_basic.c
…
cls_bpf.c
…
cls_cgroup.c
…
cls_flow.c
Remove uninitialized_var() macro for v5.9-rc1
2020-08-04 13:49:43 -07:00
cls_flower.c
net/sched: flower: fix possible OOB write in fl_set_geneve_opt()
2023-06-09 10:30:07 +02:00
cls_fw.c
…
cls_matchall.c
…
cls_route.c
net_sched: cls_route: disallow handle of 0
2022-08-21 15:16:26 +02:00
cls_rsvp6.c
…
cls_rsvp.c
…
cls_rsvp.h
…
cls_u32.c
net/sched: cls_u32: Fix reference counter leak leading to overflow
2023-06-21 15:45:38 +02:00
em_canid.c
net: sched: kerneldoc fixes
2020-07-13 17:20:40 -07:00
em_cmp.c
…
em_ipset.c
sched: consistently handle layer3 header accesses in the presence of VLANs
2020-07-03 14:34:53 -07:00
em_ipt.c
sched: consistently handle layer3 header accesses in the presence of VLANs
2020-07-03 14:34:53 -07:00
em_meta.c
sched: consistently handle layer3 header accesses in the presence of VLANs
2020-07-03 14:34:53 -07:00
em_nbyte.c
…
em_text.c
…
em_u32.c
…
ematch.c
net_sched: reject TCF_EM_SIMPLE case for complex ematch module
2023-01-14 10:16:12 +01:00
Kconfig
net/sched: Retire tcindex classifier
2023-03-11 16:40:08 +01:00
Makefile
net/sched: Retire tcindex classifier
2023-03-11 16:40:08 +01:00
sch_api.c
net: sched: fix NULL pointer dereference in mq_attach
2023-06-09 10:30:06 +02:00
sch_atm.c
net: sched: atm: dont intepret cls results when asked to drop
2023-01-14 10:16:47 +01:00
sch_blackhole.c
Revert "net: sched: Pass root lock to Qdisc_ops.enqueue"
2020-07-16 16:48:34 -07:00
sch_cake.c
net: sched: cake: fix null pointer access issue when cake_init() fails
2022-10-30 09:41:17 +01:00
sch_cbq.c
net: sched: cbq: dont intepret cls results when asked to drop
2023-01-14 10:16:47 +01:00
sch_cbs.c
Revert "net: sched: Pass root lock to Qdisc_ops.enqueue"
2020-07-16 16:48:34 -07:00
sch_choke.c
net: sched: delete duplicate cleanup of backlog and qlen
2022-10-30 09:41:17 +01:00
sch_codel.c
Revert "net: sched: Pass root lock to Qdisc_ops.enqueue"
2020-07-16 16:48:34 -07:00
sch_drr.c
net: sched: delete duplicate cleanup of backlog and qlen
2022-10-30 09:41:17 +01:00
sch_dsmark.c
net: sched: delete duplicate cleanup of backlog and qlen
2022-10-30 09:41:17 +01:00
sch_etf.c
net: sched: delete duplicate cleanup of backlog and qlen
2022-10-30 09:41:17 +01:00
sch_ets.c
net: sched: delete duplicate cleanup of backlog and qlen
2022-10-30 09:41:17 +01:00
sch_fifo.c
net_sched: fix NULL deref in fifo_set_limit()
2021-10-13 10:04:26 +02:00
sch_fq_codel.c
net: sched: delete duplicate cleanup of backlog and qlen
2022-10-30 09:41:17 +01:00
sch_fq_pie.c
net/sched: fq_pie: ensure reasonable TCA_FQ_PIE_QUANTUM values
2023-06-14 11:09:39 +02:00
sch_fq.c
net/sched: sch_fq: fix integer overflow of "credit"
2023-05-17 11:47:53 +02:00
sch_generic.c
net/sched: fix netdevice reference leaks in attach_default_qdiscs()
2022-09-08 11:11:36 +02:00
sch_gred.c
net: sched: validate stab values
2021-03-30 14:31:57 +02:00
sch_hfsc.c
net: sched: delete duplicate cleanup of backlog and qlen
2022-10-30 09:41:17 +01:00
sch_hhf.c
Revert "net: sched: Pass root lock to Qdisc_ops.enqueue"
2020-07-16 16:48:34 -07:00
sch_htb.c
net: sched: sch: Fix off by one in htb_activate_prios()
2023-02-22 12:56:00 +01:00
sch_ingress.c
net/sched: Reserve TC_H_INGRESS (TC_H_CLSACT) for ingress (clsact) Qdiscs
2023-06-09 10:30:06 +02:00
sch_mq.c
net: sched: update default qdisc visibility after Tx queue cnt changes
2021-11-18 14:03:53 +01:00
sch_mqprio.c
net: sched: update default qdisc visibility after Tx queue cnt changes
2021-11-18 14:03:53 +01:00
sch_multiq.c
net: sched: delete duplicate cleanup of backlog and qlen
2022-10-30 09:41:17 +01:00
sch_netem.c
net/sched: sch_netem: Fix arithmetic in netem_dump() for 32-bit platforms
2022-06-29 08:59:47 +02:00
sch_pie.c
Revert "net: sched: Pass root lock to Qdisc_ops.enqueue"
2020-07-16 16:48:34 -07:00
sch_plug.c
Revert "net: sched: Pass root lock to Qdisc_ops.enqueue"
2020-07-16 16:48:34 -07:00
sch_prio.c
net: sched: delete duplicate cleanup of backlog and qlen
2022-10-30 09:41:17 +01:00
sch_qfq.c
net: sched: sch_qfq: prevent slab-out-of-bounds in qfq_activate_agg
2023-04-26 11:27:34 +02:00
sch_red.c
net: sched: Fix use after free in red_enqueue()
2022-11-10 18:14:18 +01:00
sch_sfb.c
net: sched: sfb: fix null pointer access issue when sfb_init() fails
2022-10-30 09:41:17 +01:00
sch_sfq.c
net: sched: validate stab values
2021-03-30 14:31:57 +02:00
sch_skbprio.c
net: sched: delete duplicate cleanup of backlog and qlen
2022-10-30 09:41:17 +01:00
sch_taprio.c
Revert "net/sched: taprio: make qdisc_leaf() see the per-netdev-queue pfifo child qdiscs"
2023-02-25 11:55:04 +01:00
sch_tbf.c
net: sched: delete duplicate cleanup of backlog and qlen
2022-10-30 09:41:17 +01:00
sch_teql.c
net: sched: delete duplicate cleanup of backlog and qlen
2022-10-30 09:41:17 +01:00