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linux/net/sched
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Cong Wang 7a1bad565c net_sched: let qdisc_put() accept NULL pointer 
[ Upstream commit 6efb971ba8 ]

When tcf_block_get() fails in sfb_init(), q->qdisc is still a NULL
pointer which leads to a crash in sfb_destroy(). Similar for
sch_dsmark.

Instead of fixing each separately, Linus suggested to just accept
NULL pointer in qdisc_put(), which would make callers easier.

(For sch_dsmark, the bug probably exists long before commit
6529eaba33f0.)

Fixes: 6529eaba33 ("net: sched: introduce tcf block infractructure")
Reported-by: syzbot+d5870a903591faaca4ae@syzkaller.appspotmail.com
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-21 07:16:44 +02:00
..
act_api.c net: sched: don't use tc_action->order during action dump 2019-06-04 08:02:32 +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 net_sched: fix a NULL pointer deref in ipt action 2019-09-10 10:33:39 +01:00
act_csum.c net_sched: fix a NULL pointer deref in ipt action 2019-09-10 10:33:39 +01:00
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
act_meta_skbprio.c
act_meta_skbtcindex.c
act_mirred.c net_sched: fix a NULL pointer deref in ipt action 2019-09-10 10:33:39 +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: fix a NULL pointer deref in ipt action 2019-09-10 10:33:39 +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: fix a NULL pointer deref in ipt action 2019-09-10 10:33:39 +01:00
act_simple.c net_sched: fix a NULL pointer deref in ipt action 2019-09-10 10:33:39 +01:00
act_skbedit.c net_sched: fix a NULL pointer deref in ipt action 2019-09-10 10:33:39 +01:00
act_skbmod.c net_sched: fix a NULL pointer deref in ipt action 2019-09-10 10:33:39 +01:00
act_tunnel_key.c net_sched: fix a NULL pointer deref in ipt action 2019-09-10 10:33:39 +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: verify that q!=NULL before setting q->flags 2019-07-28 08:29:30 +02:00
cls_basic.c sched: fix trailing whitespace 2018-07-24 14:10:42 -07:00
cls_bpf.c cls_bpf: Use kmemdup instead of duplicating it in cls_bpf_prog_from_ops 2018-07-29 13:19:49 -07:00
cls_cgroup.c net_sched: switch to rcu_work 2018-05-24 22:56:15 -04:00
cls_flow.c net_sched: switch to rcu_work 2018-05-24 22:56:15 -04:00
cls_flower.c net: sched: flower: insert new filter to idr after setting its mask 2019-03-19 13:12:41 +01:00
cls_fw.c net_sched: switch to rcu_work 2018-05-24 22:56:15 -04:00
cls_matchall.c net/sched: fix ->get helper of the matchall cls 2019-04-17 08:38:41 +02:00
cls_route.c net_sched: switch to rcu_work 2018-05-24 22:56:15 -04:00
cls_rsvp.c
cls_rsvp.h net_sched: switch to rcu_work 2018-05-24 22:56:15 -04:00
cls_rsvp6.c
cls_tcindex.c net_sched: fix two more memory leaks in cls_tcindex 2019-02-27 10:08:59 +01:00
cls_u32.c net: sched: cls_u32: fix hnode refcounting 2018-10-07 21:02:37 -07:00
em_canid.c
em_cmp.c
em_ipset.c
em_ipt.c net: sched: add em_ipt ematch for calling xtables matches 2018-02-21 13:15:33 -05:00
em_meta.c
em_nbyte.c
em_text.c
em_u32.c
ematch.c
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: Remove TCA_OPTIONS from policy 2018-11-13 11:09:00 -08:00
sch_atm.c
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: Simplify logic in cake_select_tin() 2019-04-27 09:36:32 +02:00
sch_cbq.c
sch_cbs.c cbs: Add support for the graft function 2018-07-26 13:58:30 -07:00
sch_choke.c
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
sch_dsmark.c
sch_etf.c net/sched: Make etf report drops on error_queue 2018-07-04 22:30:28 +09:00
sch_fifo.c
sch_fq_codel.c net_sched: unset TCQ_F_CAN_BYPASS when adding filters 2019-07-28 08:29:27 +02:00
sch_fq.c net_sched: fq: take care of throttled flows before reuse 2018-05-02 16:37:38 -04:00
sch_generic.c net_sched: let qdisc_put() accept NULL pointer 2019-09-21 07:16:44 +02:00
sch_gred.c net: sched: gred: pass the right attribute to gred_change_table_def() 2018-11-04 14:50:51 +01:00
sch_hfsc.c net_sched: remove a bogus warning in hfsc 2018-06-23 10:58:46 +09:00
sch_hhf.c sch_hhf: ensure quantum and hhf_non_hh_weight are non-zero 2019-09-19 09:09:31 +02:00
sch_htb.c net_sched: remove unused htb drop_list 2018-06-24 16:42:46 +09:00
sch_ingress.c
sch_mq.c net: sched: mq: request stats from offloads 2018-05-29 09:49:16 -04:00
sch_mqprio.c
sch_multiq.c
sch_netem.c net: netem: fix skb length BUG_ON in __skb_to_sgvec 2019-03-10 07:17:18 +01:00
sch_pie.c
sch_plug.c
sch_prio.c net: sch: prio: Add offload ability for grafting a child 2018-02-28 12:06:01 -05:00
sch_qfq.c
sch_red.c net: sched: red: avoid hashing NULL child 2018-05-18 13:52:32 -04:00
sch_sfb.c
sch_sfq.c net_sched: unset TCQ_F_CAN_BYPASS when adding filters 2019-07-28 08:29:27 +02:00
sch_skbprio.c net/sched: add skbprio scheduler 2018-07-24 14:44:00 -07:00
sch_tbf.c net: sched: red: avoid hashing NULL child 2018-05-18 13:52:32 -04:00
sch_teql.c