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![]() It is possible for syzbot to side-step the restriction imposed by the
blamed commit in the Fixes: tag, because the taprio UAPI permits a
cycle-time different from (and potentially shorter than) the sum of
entry intervals.
We need one more restriction, which is that the cycle time itself must
be larger than N * ETH_ZLEN bit times, where N is the number of schedule
entries. This restriction needs to apply regardless of whether the cycle
time came from the user or was the implicit, auto-calculated value, so
we move the existing "cycle == 0" check outside the "if "(!new->cycle_time)"
branch. This way covers both conditions and scenarios.
Add a selftest which illustrates the issue triggered by syzbot.
Fixes:
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.. | ||
act_api.c | ||
act_bpf.c | ||
act_connmark.c | ||
act_csum.c | ||
act_ct.c | ||
act_ctinfo.c | ||
act_gact.c | ||
act_gate.c | ||
act_ife.c | ||
act_meta_mark.c | ||
act_meta_skbprio.c | ||
act_meta_skbtcindex.c | ||
act_mirred.c | ||
act_mpls.c | ||
act_nat.c | ||
act_pedit.c | ||
act_police.c | ||
act_sample.c | ||
act_simple.c | ||
act_skbedit.c | ||
act_skbmod.c | ||
act_tunnel_key.c | ||
act_vlan.c | ||
cls_api.c | ||
cls_basic.c | ||
cls_bpf.c | ||
cls_cgroup.c | ||
cls_flow.c | ||
cls_flower.c | ||
cls_fw.c | ||
cls_matchall.c | ||
cls_route.c | ||
cls_u32.c | ||
em_canid.c | ||
em_cmp.c | ||
em_ipset.c | ||
em_ipt.c | ||
em_meta.c | ||
em_nbyte.c | ||
em_text.c | ||
em_u32.c | ||
ematch.c | ||
Kconfig | ||
Makefile | ||
sch_api.c | ||
sch_blackhole.c | ||
sch_cake.c | ||
sch_cbs.c | ||
sch_choke.c | ||
sch_codel.c | ||
sch_drr.c | ||
sch_etf.c | ||
sch_ets.c | ||
sch_fifo.c | ||
sch_fq.c | ||
sch_fq_codel.c | ||
sch_fq_pie.c | ||
sch_frag.c | ||
sch_generic.c | ||
sch_gred.c | ||
sch_hfsc.c | ||
sch_hhf.c | ||
sch_htb.c | ||
sch_ingress.c | ||
sch_mq.c | ||
sch_mqprio.c | ||
sch_mqprio_lib.c | ||
sch_mqprio_lib.h | ||
sch_multiq.c | ||
sch_netem.c | ||
sch_pie.c | ||
sch_plug.c | ||
sch_prio.c | ||
sch_qfq.c | ||
sch_red.c | ||
sch_sfb.c | ||
sch_sfq.c | ||
sch_skbprio.c | ||
sch_taprio.c | ||
sch_tbf.c | ||
sch_teql.c |