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linux/net/sched
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Eric Dumazet 7c11350616 fq_codel: reject silly quantum parameters 
[ Upstream commit c7c5e6ff53 ]

syzbot found that forcing a big quantum attribute would crash hosts fast,
essentially using this:

tc qd replace dev eth0 root fq_codel quantum 4294967295

This is because fq_codel_dequeue() would have to loop
~2^31 times in :

	if (flow->deficit <= 0) {
		flow->deficit += q->quantum;
		list_move_tail(&flow->flowchain, &q->old_flows);
		goto begin;
	}

SFQ max quantum is 2^19 (half a megabyte)
Lets adopt a max quantum of one megabyte for FQ_CODEL.

Fixes: 4b549a2ef4 ("fq_codel: Fair Queue Codel AQM")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-09-22 11:48:14 +02:00
..
act_api.c
net: sched: bump refcount for new action in ACT replace mode
2021-04-14 08:22:36 +02:00
act_bpf.c
net_sched: fix a NULL pointer deref in ipt action
2019-09-10 10:33:39 +01:00
act_connmark.c
sched: consistently handle layer3 header accesses in the presence of VLANs
2020-07-22 09:32:00 +02:00
act_csum.c
sched: consistently handle layer3 header accesses in the presence of VLANs
2020-07-22 09:32:00 +02:00
act_gact.c
net_sched: fix a NULL pointer deref in ipt action
2019-09-10 10:33:39 +01:00
act_ife.c
net_sched: fix a NULL pointer deref in ipt action
2019-09-10 10:33:39 +01:00
act_ipt.c
net_sched: fix a NULL pointer deref in ipt action
2019-09-10 10:33:39 +01:00
act_meta_mark.c
net: remove duplicate includes
2017-12-13 13:18:46 -05:00
act_meta_skbprio.c
net sched actions: change IFE modules alias names
2017-10-12 22:13:20 -07:00
act_meta_skbtcindex.c
net: remove duplicate includes
2017-12-13 13:18:46 -05:00
act_mirred.c
act_mirred: Fix mirred_init_module error handling
2020-01-27 14:51:18 +01:00
act_nat.c
net_sched: fix a NULL pointer deref in ipt action
2019-09-10 10:33:39 +01:00
act_pedit.c
net/sched: act_pedit: fix WARN() in the traffic path
2019-12-01 09:16:06 +01:00
act_police.c
net_sched: fix a NULL pointer deref in ipt action
2019-09-10 10:33:39 +01:00
act_sample.c
net/sched: act_sample: don't push mac header on ip6gre ingress
2019-10-05 13:09:28 +02:00
act_simple.c
net_sched: fix a NULL pointer deref in ipt action
2019-09-10 10:33:39 +01:00
act_skbedit.c
sched: consistently handle layer3 header accesses in the presence of VLANs
2020-07-22 09:32:00 +02:00
act_skbmod.c
net/sched: act_skbmod: Skip non-Ethernet packets
2021-07-28 11:13:48 +02:00
act_tunnel_key.c
net/sched: act_tunnel_key: fix OOB write in case of IPv6 ERSPAN tunnels
2020-10-29 09:54:58 +01:00
act_vlan.c
net_sched: fix a NULL pointer deref in ipt action
2019-09-10 10:33:39 +01:00
cls_api.c
net: sched: cls_api: Fix the the wrong parameter
2021-07-28 11:13:49 +02:00
cls_basic.c
net_sched: fix ops->bind_class() implementations
2020-02-01 09:37:06 +00:00
cls_bpf.c
net_sched: fix ops->bind_class() implementations
2020-02-01 09:37:06 +00:00
cls_cgroup.c
net_sched: switch to rcu_work
2018-05-24 22:56:15 -04:00
cls_flow.c
sched: consistently handle layer3 header accesses in the presence of VLANs
2020-07-22 09:32:00 +02:00
cls_flower.c
sched: consistently handle layer3 header accesses in the presence of VLANs
2020-07-22 09:32:00 +02:00
cls_fw.c
net_sched: fix ops->bind_class() implementations
2020-02-01 09:37:06 +00:00
cls_matchall.c
net/sched: matchall: add missing validation of TCA_MATCHALL_FLAGS
2020-02-24 08:34:34 +01:00
cls_route.c
net_sched: cls_route: remove the right filter from hashtable
2020-04-02 15:28:11 +02:00
cls_rsvp6.c
[NET_SCHED]: Remove unnecessary includes
2007-07-10 22:16:41 -07:00
cls_rsvp.c
[NET_SCHED]: Remove unnecessary includes
2007-07-10 22:16:41 -07:00
cls_rsvp.h
cls_rsvp: fix rsvp_policy
2020-02-11 04:33:52 -08:00
cls_tcindex.c
net: sched: fix warning in tcindex_alloc_perfect_hash
2021-07-20 16:15:53 +02:00
cls_u32.c
net_sched: fix ops->bind_class() implementations
2020-02-01 09:37:06 +00:00
em_canid.c
net: sched: remove tcf_proto from ematch calls
2014-10-06 18:02:32 -04:00
em_cmp.c
net_sched: cleanups
2011-01-19 23:31:12 -08:00
em_ipset.c
sched: consistently handle layer3 header accesses in the presence of VLANs
2020-07-22 09:32:00 +02:00
em_ipt.c
net: sched: add em_ipt ematch for calling xtables matches
2018-02-21 13:15:33 -05:00
em_meta.c
sched: consistently handle layer3 header accesses in the presence of VLANs
2020-07-22 09:32:00 +02:00
em_nbyte.c
net: sched: em_nbyte: don't add the data offset twice
2018-01-24 14:52:40 -05:00
em_text.c
net: Remove state argument from skb_find_text()
2015-02-22 15:59:54 -05:00
em_u32.c
net_sched: cleanups
2011-01-19 23:31:12 -08:00
ematch.c
net_sched: ematch: reject invalid TCF_EM_SIMPLE
2020-02-01 09:37:05 +00:00
Kconfig
net/sched: add skbprio scheduler
2018-07-24 14:44:00 -07:00
Makefile
net/sched: add skbprio scheduler
2018-07-24 14:44:00 -07:00
sch_api.c
net: sched: avoid duplicates in classes dump
2021-03-17 16:43:43 +01:00
sch_atm.c
net_sched: fix a memory leak in atm_tc_init()
2020-07-22 09:31:59 +02:00
sch_blackhole.c
net_sched: blackhole: tell upper qdisc about dropped packets
2018-06-17 08:42:33 +09:00
sch_cake.c
sch_cake: Fix out of bounds when parsing TCP options and header
2021-06-30 08:48:17 -04:00
sch_cbq.c
net: sched: Fix qdisc_rate_table refcount leak when get tcf_block failed
2021-09-22 11:47:55 +02:00
sch_cbs.c
net: cbs: Fix software cbs to consider packet sending time
2020-04-02 15:28:11 +02:00
sch_choke.c
net: sched: validate stab values
2021-03-30 14:37:03 +02:00
sch_codel.c
net: sched: Fix a possible null-pointer dereference in dequeue_func()
2019-08-09 17:52:32 +02:00
sch_drr.c
net: sch: sch_drr: add extack support
2017-12-21 12:32:51 -05:00
sch_dsmark.c
sch_dsmark: fix a NULL deref in qdisc_reset()
2021-06-03 08:38:12 +02:00
sch_etf.c
sched: etf: do not assume all sockets are full blown
2020-04-29 16:31:21 +02:00
sch_fifo.c
net: sch: api: add extack support in qdisc_create_dflt
2017-12-21 12:32:51 -05:00
sch_fq_codel.c
fq_codel: reject silly quantum parameters
2021-09-22 11:48:14 +02:00
sch_fq.c
net: fq: add missing attribute validation for orphan mask
2020-03-18 07:14:16 +01:00
sch_generic.c
net: sch_generic: fix the missing new qdisc assignment bug
2020-11-18 19:18:53 +01:00
sch_gred.c
net: sched: validate stab values
2021-03-30 14:37:03 +02:00
sch_hfsc.c
net_sched: remove a bogus warning in hfsc
2018-06-23 10:58:46 +09:00
sch_hhf.c
net/flow_dissector: switch to siphash
2019-11-10 11:27:54 +01:00
sch_htb.c
net_sched: remove unused htb drop_list
2018-06-24 16:42:46 +09:00
sch_ingress.c
net: sched: allow ingress and clsact qdiscs to share filter blocks
2018-01-17 14:53:57 -05:00
sch_mq.c
net: sched: fix dump qlen for sch_mq/sch_mqprio with NOLOCK subqueues
2019-12-21 10:57:12 +01:00
sch_mqprio.c
net: sched: fix dump qlen for sch_mq/sch_mqprio with NOLOCK subqueues
2019-12-21 10:57:12 +01:00
sch_multiq.c
net: sched: fix tc -s class show no bstats on class with nolock subqueues
2019-12-05 09:21:32 +01:00
sch_netem.c
netem: fix zero division in tabledist
2020-11-05 11:08:33 +01:00
sch_pie.c
net: sched: sch: add extack for change qdisc ops
2017-12-21 12:32:50 -05:00
sch_plug.c
net: sched: sch: add extack for change qdisc ops
2017-12-21 12:32:50 -05:00
sch_prio.c
net: sch_prio: When ungrafting, replace with FIFO
2020-01-12 12:17:29 +01:00
sch_qfq.c
pkt_sched: sch_qfq: fix qfq_change_class() error path
2021-07-20 16:15:51 +02:00
sch_red.c
net: sched: validate stab values
2021-03-30 14:37:03 +02:00
sch_sfb.c
net/flow_dissector: switch to siphash
2019-11-10 11:27:54 +01:00
sch_sfq.c
net: sched: validate stab values
2021-03-30 14:37:03 +02:00
sch_skbprio.c
net_sched: sch_skbprio: add message validation to skbprio_change()
2020-05-14 07:57:17 +02:00
sch_tbf.c
net: sched: red: avoid hashing NULL child
2018-05-18 13:52:32 -04:00
sch_teql.c
net: sched: sch_teql: fix null-pointer dereference
2021-04-14 08:22:33 +02:00