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2e24cd7555
linux/net/sched
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Cong Wang 2e24cd7555 net_sched: fix ops->bind_class() implementations 
The current implementations of ops->bind_class() are merely
searching for classid and updating class in the struct tcf_result,
without invoking either of cl_ops->bind_tcf() or
cl_ops->unbind_tcf(). This breaks the design of them as qdisc's
like cbq use them to count filters too. This is why syzbot triggered
the warning in cbq_destroy_class().

In order to fix this, we have to call cl_ops->bind_tcf() and
cl_ops->unbind_tcf() like the filter binding path. This patch does
so by refactoring out two helper functions __tcf_bind_filter()
and __tcf_unbind_filter(), which are lockless and accept a Qdisc
pointer, then teaching each implementation to call them correctly.

Note, we merely pass the Qdisc pointer as an opaque pointer to
each filter, they only need to pass it down to the helper
functions without understanding it at all.

Fixes: 07d79fc7d9 ("net_sched: add reverse binding for tc class")
Reported-and-tested-by: syzbot+0a0596220218fcb603a8@syzkaller.appspotmail.com
Reported-and-tested-by: syzbot+63bdb6006961d8c917c6@syzkaller.appspotmail.com
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-27 10:51:43 +01:00
..
act_api.c Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 15:42:43 -08:00
act_bpf.c net: sched: update action implementations to support flags 2019-10-30 18:07:51 -07:00
act_connmark.c net: sched: update action implementations to support flags 2019-10-30 18:07:51 -07:00
act_csum.c Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 15:42:43 -08:00
act_ct.c treewide: Use sizeof_field() macro 2019-12-09 10:36:44 -08:00
act_ctinfo.c net: sched: act_ctinfo: fix memory leak 2020-01-19 16:02:15 +01:00
act_gact.c net: sched: update action implementations to support flags 2019-10-30 18:07:51 -07:00
act_ife.c net/sched: act_ife: initalize ife->metalist earlier 2020-01-17 10:58:15 +01:00
act_ipt.c net: sched: update action implementations to support flags 2019-10-30 18:07:51 -07:00
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: act_mirred: Pull mac prior redir to non mac_header_xmit device 2019-12-27 16:35:32 -08:00
act_mpls.c net: Fixed updating of ethertype in skb_mpls_push() 2019-12-04 17:11:25 -08:00
act_nat.c icmp: remove duplicate code 2019-11-05 14:03:11 -08:00
act_pedit.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-11-22 16:27:24 -08:00
act_police.c Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 15:42:43 -08:00
act_sample.c Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 15:42:43 -08:00
act_simple.c net_sched: extend packet counter to 64bit 2019-11-05 18:20:55 -08:00
act_skbedit.c Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 15:42:43 -08:00
act_skbmod.c net: sched: update action implementations to support flags 2019-10-30 18:07:51 -07:00
act_tunnel_key.c Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 15:42:43 -08:00
act_vlan.c Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 15:42:43 -08:00
cls_api.c net_sched: use validated TCA_KIND attribute in tc_new_tfilter() 2020-01-22 21:11:50 +01:00
cls_basic.c net_sched: fix ops->bind_class() implementations 2020-01-27 10:51:43 +01:00
cls_bpf.c net_sched: fix ops->bind_class() implementations 2020-01-27 10:51:43 +01:00
cls_cgroup.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
cls_flow.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
cls_flower.c net_sched: fix ops->bind_class() implementations 2020-01-27 10:51:43 +01:00
cls_fw.c net_sched: fix ops->bind_class() implementations 2020-01-27 10:51:43 +01:00
cls_matchall.c net_sched: fix ops->bind_class() implementations 2020-01-27 10:51:43 +01:00
cls_route.c net_sched: fix ops->bind_class() implementations 2020-01-27 10:51:43 +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: fix ops->bind_class() implementations 2020-01-27 10:51:43 +01:00
cls_tcindex.c net_sched: fix ops->bind_class() implementations 2020-01-27 10:51:43 +01:00
cls_u32.c net_sched: fix ops->bind_class() implementations 2020-01-27 10:51:43 +01:00
em_canid.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 11 2019-05-21 11:28:45 +02:00
em_cmp.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
em_ipset.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
em_ipt.c net: sched: em_ipt: add support for addrtype matching 2019-06-29 11:15:12 -07:00
em_meta.c net: annotate lockless accesses to sk->sk_max_ack_backlog 2019-11-06 16:14:48 -08:00
em_nbyte.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
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: fix datalen for ematch 2020-01-23 21:34:42 +01:00
Kconfig net: sched: add Flow Queue PIE packet scheduler 2020-01-23 11:38:31 +01:00
Makefile net: sched: add Flow Queue PIE packet scheduler 2020-01-23 11:38:31 +01:00
sch_api.c net_sched: fix ops->bind_class() implementations 2020-01-27 10:51:43 +01:00
sch_atm.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
sch_blackhole.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sch_cake.c net: sched: use skb_list_walk_safe helper for gso segments 2020-01-14 11:48:41 -08:00
sch_cbq.c sch_cbq: validate TCA_CBQ_WRROPT to avoid crash 2019-09-30 11:07:46 -07:00
sch_cbs.c net: sched: cbs: Avoid division by zero when calculating the port rate 2019-10-01 09:51:39 -07:00
sch_choke.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
sch_codel.c net: sched: Fix a possible null-pointer dereference in dequeue_func() 2019-07-29 09:46:58 -07:00
sch_drr.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
sch_dsmark.c sch_dsmark: fix potential NULL deref in dsmark_init() 2019-10-04 18:28:30 -07:00
sch_etf.c sched: etf: Fix ordering of packets with same txtime 2019-10-15 20:32:04 -07:00
sch_ets.c net: sch_ets: Make the ETS qdisc offloadable 2019-12-18 13:32:29 -08:00
sch_fifo.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sch_fq_codel.c fq_codel: do not include <linux/jhash.h> 2019-10-22 15:31:42 -07:00
sch_fq_pie.c net: sched: add Flow Queue PIE packet scheduler 2020-01-23 11:38:31 +01:00
sch_fq.c pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM 2020-01-08 12:40:47 -08:00
sch_generic.c netdev: pass the stuck queue to the timeout handler 2019-12-12 21:38:57 -08:00
sch_gred.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sch_hfsc.c netlink: make validation more configurable for future strictness 2019-04-27 17:07:21 -04:00
sch_hhf.c net/flow_dissector: switch to siphash 2019-10-23 20:13:22 -07:00
sch_htb.c net: sched: sch_htb: don't call qdisc_put() while holding tree lock 2019-09-27 12:13:55 +02:00
sch_ingress.c net: flow_offload: rename TCF_BLOCK_BINDER_TYPE_* to FLOW_BLOCK_BINDER_TYPE_* 2019-07-09 14:38:50 -07:00
sch_mq.c net: sched: fix dump qlen for sch_mq/sch_mqprio with NOLOCK subqueues 2019-12-03 11:53:55 -08:00
sch_mqprio.c mqprio: Fix out-of-bounds access in mqprio_dump 2019-12-06 11:58:45 -08:00
sch_multiq.c net: sched: fix tc -s class show no bstats on class with nolock subqueues 2019-11-30 10:38:40 -08:00
sch_netem.c net: netem: correct the parent's backlog when corrupted packet was dropped 2019-10-19 12:12:36 -07:00
sch_pie.c net: sched: pie: export symbols to be reused by FQ-PIE 2020-01-23 11:38:31 +01:00
sch_plug.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sch_prio.c net: sch_prio: When ungrafting, replace with FIFO 2020-01-08 12:45:53 -08:00
sch_qfq.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
sch_red.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sch_sfb.c net/flow_dissector: switch to siphash 2019-10-23 20:13:22 -07:00
sch_sfq.c net/flow_dissector: switch to siphash 2019-10-23 20:13:22 -07:00
sch_skbprio.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sch_taprio.c taprio: don't reject same mqprio settings 2019-11-19 15:23:15 -08:00
sch_tbf.c net: sched: Make TBF Qdisc offloadable 2020-01-25 10:56:31 +01:00
sch_teql.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00