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Jakub Kicinski 58bdab02b2 net: sched: gred: prevent races when adding offloads to stats 
[ Upstream commit 339346d49ae0859fe19b860998867861d37f1a76 ]

Naresh reports seeing a warning that gred is calling
u64_stats_update_begin() with preemption enabled.
Arnd points out it's coming from _bstats_update().

We should be holding the qdisc lock when writing
to stats, they are also updated from the datapath.

Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
Link: https://lore.kernel.org/all/CA+G9fYsTr9_r893+62u6UGD3dVaCE-kN9C-Apmb2m=hxjc1Cqg@mail.gmail.com/
Fixes: e49efd5288bd ("net: sched: gred: support reporting stats from offloads")
Link: https://lore.kernel.org/r/20230113044137.1383067-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-02-01 08:34:25 +01:00
..
act_api.c
net: sched: act_api: implement generic walker and search for tc action
2022-09-09 08:24:41 +01:00
act_bpf.c
net: sched: act_bpf: simplify code logic in tcf_bpf_init()
2022-09-28 09:38:56 +01:00
act_connmark.c
netfilter: conntrack: Fix data-races around ct mark
2022-11-18 15:21:00 +01:00
act_csum.c
net: sched: act_csum: get rid of tcf_csum_walker and tcf_csum_search
2022-09-09 08:24:41 +01:00
act_ct.c
netfilter: conntrack: Fix data-races around ct mark
2022-11-18 15:21:00 +01:00
act_ctinfo.c
netfilter: conntrack: Fix data-races around ct mark
2022-11-18 15:21:00 +01:00
act_gact.c
treewide: use prandom_u32_max() when possible, part 1
2022-10-11 17:42:55 -06:00
act_gate.c
net: sched: act_gate: get rid of tcf_gate_walker and tcf_gate_search
2022-09-09 08:24:42 +01:00
act_ife.c
net: sched: act_ife: get rid of tcf_ife_walker and tcf_ife_search
2022-09-09 08:24:42 +01:00
act_ipt.c
net: sched: act_ipt: get rid of tcf_ipt_walker/tcf_xt_walker and tcf_ipt_search/tcf_xt_search
2022-09-09 08:24:42 +01:00
act_meta_mark.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
act_meta_skbprio.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
act_meta_skbtcindex.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
act_mirred.c
net: sched: remove unused tcf_result extension
2022-09-21 18:32:33 -07:00
act_mpls.c
net/sched: act_mpls: Fix warning during failed attribute validation
2023-01-18 11:58:29 +01:00
act_nat.c
net: sched: act_nat: get rid of tcf_nat_walker and tcf_nat_search
2022-09-09 08:24:42 +01:00
act_pedit.c
net: sched: act_pedit: get rid of tcf_pedit_walker and tcf_pedit_search
2022-09-09 08:24:42 +01:00
act_police.c
net: sched: act_police: get rid of tcf_police_walker and tcf_police_search
2022-09-09 08:24:42 +01:00
act_sample.c
treewide: use prandom_u32_max() when possible, part 1
2022-10-11 17:42:55 -06:00
act_simple.c
net: sched: act_simple: get rid of tcf_simp_walker and tcf_simp_search
2022-09-09 08:24:42 +01:00
act_skbedit.c
net: sched: act_skbedit: get rid of tcf_skbedit_walker and tcf_skbedit_search
2022-09-09 08:24:42 +01:00
act_skbmod.c
net: sched: act_skbmod: get rid of tcf_skbmod_walker and tcf_skbmod_search
2022-09-09 08:24:42 +01:00
act_tunnel_key.c
net: sched: act_tunnel_key: get rid of tunnel_key_walker and tunnel_key_search
2022-09-09 08:24:42 +01:00
act_vlan.c
net: sched: act_vlan: get rid of tcf_vlan_walker and tcf_vlan_search
2022-09-09 08:24:43 +01:00
cls_api.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2022-09-22 13:02:10 -07:00
cls_basic.c
net: sched: use tc_cls_bind_class() in filter
2022-10-02 16:07:17 +01:00
cls_bpf.c
net: sched: use tc_cls_bind_class() in filter
2022-10-02 16:07:17 +01:00
cls_cgroup.c
net_sched: refactor TC action init API
2021-08-02 10:24:38 +01:00
cls_flow.c
net/sched: use tc_cls_stats_dump() in filter
2022-09-20 15:54:13 -07:00
cls_flower.c
net: sched: use tc_cls_bind_class() in filter
2022-10-02 16:07:17 +01:00
cls_fw.c
net: sched: use tc_cls_bind_class() in filter
2022-10-02 16:07:17 +01:00
cls_matchall.c
net: sched: use tc_cls_bind_class() in filter
2022-10-02 16:07:17 +01:00
cls_route.c
net: sched: use tc_cls_bind_class() in filter
2022-10-02 16:07:17 +01:00
cls_rsvp6.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
cls_rsvp.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
cls_rsvp.h
net: sched: use tc_cls_bind_class() in filter
2022-10-02 16:07:17 +01:00
cls_tcindex.c
net: sched: fix memory leak in tcindex_set_parms
2023-01-12 12:02:01 +01:00
cls_u32.c
net: sched: use tc_cls_bind_class() in filter
2022-10-02 16:07:17 +01:00
em_canid.c
net: sched: kerneldoc fixes
2020-07-13 17:20:40 -07:00
em_cmp.c
net: sched: fix misspellings using misspell-fixer tool
2020-11-10 17:00:28 -08:00
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
net_sched: em_meta: add READ_ONCE() in var_sk_bound_if()
2022-05-16 10:31:06 +01:00
em_nbyte.c
net: sched: Return the correct errno code
2021-02-06 11:15:28 -08:00
em_text.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
em_u32.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
ematch.c
net_sched: reject TCF_EM_SIMPLE case for complex ematch module
2022-12-31 13:32:55 +01:00
Kconfig
net: sched: allow act_ct to be built without NF_NAT
2022-11-22 12:16:55 +01:00
Makefile
net/sched: sch_frag: add generic packet fragment support.
2020-11-27 14:36:02 -08:00
sch_api.c
net: sched: disallow noqueue for qdisc classes
2023-01-14 10:33:43 +01:00
sch_atm.c
net: sched: atm: dont intepret cls results when asked to drop
2023-01-12 12:02:24 +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
Networking fixes for 6.1-rc2, including fixes from netfilter
2022-10-20 17:24:59 -07:00
sch_cbq.c
net: sched: cbq: dont intepret cls results when asked to drop
2023-01-12 12:02:24 +01:00
sch_cbs.c
net/sched: use tc_qdisc_stats_dump() in qdisc
2022-09-22 17:34:10 -07:00
sch_choke.c
net: sched: choke: remove unused variables in struct choke_sched_data
2022-08-31 19:39:53 -07:00
sch_codel.c
net: sched: remove redundant NULL check in change hook function
2022-09-01 08:06:45 +02:00
sch_drr.c
net/sched: use tc_qdisc_stats_dump() in qdisc
2022-09-22 17:34:10 -07:00
sch_dsmark.c
net/sched: use tc_qdisc_stats_dump() in qdisc
2022-09-22 17:34:10 -07:00
sch_etf.c
net: sched: etf: remove true check in etf_enable_offload()
2022-09-01 20:08:32 -07:00
sch_ets.c
net/sched: use tc_qdisc_stats_dump() in qdisc
2022-09-22 17:34:10 -07:00
sch_fifo.c
net_sched: fix NULL deref in fifo_set_limit()
2021-10-01 14:59:10 -07:00
sch_fq_codel.c
Revert "net: sched: fq_codel: remove redundant resource cleanup in fq_codel_init()"
2022-10-19 13:47:09 +01:00
sch_fq_pie.c
net: sched: remove redundant NULL check in change hook function
2022-09-01 08:06:45 +02:00
sch_fq.c
net: sched: remove redundant NULL check in change hook function
2022-09-01 08:06:45 +02:00
sch_frag.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2021-12-31 14:35:40 +00:00
sch_generic.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2022-09-01 12:58:02 -07:00
sch_gred.c
net: sched: gred: prevent races when adding offloads to stats
2023-02-01 08:34:25 +01:00
sch_hfsc.c
net/sched: use tc_qdisc_stats_dump() in qdisc
2022-09-22 17:34:10 -07:00
sch_hhf.c
net: sched: remove redundant NULL check in change hook function
2022-09-01 08:06:45 +02:00
sch_htb.c
sch_htb: Avoid grafting on htb_destroy_class_offload when destroying htb
2023-02-01 08:34:18 +01:00
sch_ingress.c
net: sched: Pass ingress block to tcf_classify_ingress
2020-02-19 17:49:48 -08:00
sch_mq.c
net/sched: use tc_qdisc_stats_dump() in qdisc
2022-09-22 17:34:10 -07:00
sch_mqprio.c
net/sched: use tc_qdisc_stats_dump() in qdisc
2022-09-22 17:34:10 -07:00
sch_multiq.c
net/sched: use tc_qdisc_stats_dump() in qdisc
2022-09-22 17:34:10 -07:00
sch_netem.c
treewide: use get_random_u32() when possible
2022-10-11 17:42:58 -06:00
sch_pie.c
treewide: use get_random_bytes() when possible
2022-10-11 17:42:58 -06:00
sch_plug.c
net: sched: remove redundant NULL check in change hook function
2022-09-01 08:06:45 +02:00
sch_prio.c
net/sched: use tc_qdisc_stats_dump() in qdisc
2022-09-22 17:34:10 -07:00
sch_qfq.c
net/sched: use tc_qdisc_stats_dump() in qdisc
2022-09-22 17:34:10 -07:00
sch_red.c
net: sched: Fix use after free in red_enqueue()
2022-10-31 11:55:39 +00:00
sch_sfb.c
Networking fixes for 6.1-rc2, including fixes from netfilter
2022-10-20 17:24:59 -07:00
sch_sfq.c
net/sched: use tc_qdisc_stats_dump() in qdisc
2022-09-22 17:34:10 -07:00
sch_skbprio.c
net/sched: use tc_qdisc_stats_dump() in qdisc
2022-09-22 17:34:10 -07:00
sch_taprio.c
net/sched: sch_taprio: fix possible use-after-free
2023-02-01 08:34:19 +01:00
sch_tbf.c
net/sched: use tc_qdisc_stats_dump() in qdisc
2022-09-22 17:34:10 -07:00
sch_teql.c
net: sched: delete duplicate cleanup of backlog and qlen
2022-08-25 15:10:17 +02:00