rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=40f4/1/0x4000000000000000 softirq=11152/11154 fqs=9
rcu: 	(t=10500 jiffies g=10849 q=1035 ncpus=2)
rcu: rcu_preempt kthread starved for 10460 jiffies! g10849 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:28352 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0xee1/0x59f0 kernel/sched/core.c:6710
 schedule+0xe7/0x1b0 kernel/sched/core.c:6786
 schedule_timeout+0x157/0x2c0 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x1ec/0xa50 kernel/rcu/tree.c:1609
 rcu_gp_kthread+0x249/0x380 kernel/rcu/tree.c:1808
 kthread+0x33a/0x430 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5076 Comm: kworker/1:7 Not tainted 6.5.0-rc1-syzkaller-00356-g3223eeaf0545 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
Workqueue: events_power_efficient gc_worker
RIP: 0010:div_u64_rem include/linux/math64.h:29 [inline]
RIP: 0010:div_u64 include/linux/math64.h:130 [inline]
RIP: 0010:pie_calculate_probability+0x284/0x850 net/sched/sch_pie.c:345
Code: 89 c5 48 89 6c 24 38 e8 8a e3 2d f9 47 8d 24 a4 31 d2 4c 89 ff 43 8d 0c 24 49 c1 ee 02 48 b8 ff ff ff ff ff ff ff 00 48 f7 f1 <48> 89 c5 48 89 c6 48 c1 eb 02 49 89 cc e8 6a de 2d f9 49 39 ef 73
RSP: 0018:ffffc900001e0bc0 EFLAGS: 00000203
RAX: 000000a7c5ac471b RBX: 000000000abcc771 RCX: 00000000000186a0
RDX: 0000000000006d1f RSI: ffffffff88589896 RDI: 0000000000000000
RBP: 0000068db8bac710 R08: 0000000000000005 R09: 00000000000f4240
R10: 0000000000002710 R11: 0000000000000000 R12: 000000000000c350
R13: 0000000000000003 R14: 000000000044b82f R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e5e1a6c4a0 CR3: 00000000739ff000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 fq_pie_timer+0x1da/0x4f0 net/sched/sch_fq_pie.c:387
 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x764/0xb10 kernel/time/timer.c:2022
 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035
 __do_softirq+0x218/0x965 kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu kernel/softirq.c:632 [inline]
 irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1109
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__seqprop_spinlock_sequence include/linux/seqlock.h:275 [inline]
RIP: 0010:nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:343 [inline]
RIP: 0010:gc_worker+0x2e3/0x17f0 net/netfilter/nf_conntrack_core.c:1490
Code: 00 00 48 c7 c7 c8 3a ac 8e e8 79 74 fd f8 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 87 67 1c f9 48 85 db 58 0f 85 a4 10 00 00 <e8> e8 6b 1c f9 eb 07 e8 e1 6b 1c f9 f3 90 44 8b 35 78 2a 42 06 31
RSP: 0018:ffffc90003e8fc10 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888021ce3b80 RSI: ffffffff886a1c13 RDI: 0000000000000007
RBP: ffff888028400000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000005e
R13: dffffc0000000000 R14: 00000000000000bb R15: 0000000000040000
 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2597
 worker_thread+0x687/0x1110 kernel/workqueue.c:2748
 kthread+0x33a/0x430 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.079 msecs
CPU: 0 PID: 5122 Comm: syz-executor109 Not tainted 6.5.0-rc1-syzkaller-00356-g3223eeaf0545 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x31/0x70 kernel/kcov.c:207
Code: 5d 3d 7d 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 80 b9 03 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 04 16 00 00 <85> c0 74 2b 8b 82 e0 15 00 00 83 f8 02 75 20 48 8b 8a e8 15 00 00
RSP: 0018:ffffc90000007bc8 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 0000000002af31dc RCX: 0000000000000100
RDX: ffff88801fced940 RSI: ffffffff88589896 RDI: 0000000000000005
RBP: 000000a7c5ac471b R08: 0000000000000005 R09: 00000000000f4240
R10: 00000000000186a0 R11: 00000000a4ab66ce R12: 00000000000186a0
R13: 0000000000000002 R14: 000000000044b82f R15: 0000000000000000
FS:  00005555574fb480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e5e1a5d560 CR3: 000000006a5fa000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 pie_calculate_probability+0x266/0x850 net/sched/sch_pie.c:347
 fq_pie_timer+0x1da/0x4f0 net/sched/sch_fq_pie.c:387
 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x764/0xb10 kernel/time/timer.c:2022
 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035
 __do_softirq+0x218/0x965 kernel/softirq.c:553
 do_softirq kernel/softirq.c:454 [inline]
 do_softirq+0xaa/0xe0 kernel/softirq.c:441
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x120 kernel/softirq.c:381
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 some_qdisc_is_busy net/sched/sch_generic.c:1322 [inline]
 dev_deactivate_many+0x608/0xb10 net/sched/sch_generic.c:1367
 dev_deactivate+0xed/0x1b0 net/sched/sch_generic.c:1382
 qdisc_graft+0xde1/0x1680 net/sched/sch_api.c:1108
 tc_modify_qdisc+0xcd2/0x1bf0 net/sched/sch_api.c:1731
 rtnetlink_rcv_msg+0x439/0xd30 net/core/rtnetlink.c:6423
 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2546
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x539/0x800 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0x93c/0xe30 net/netlink/af_netlink.c:1911
 sock_sendmsg_nosec net/socket.c:725 [inline]
 sock_sendmsg+0xd9/0x180 net/socket.c:748
 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2494
 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2548
 __sys_sendmsg+0x117/0x1e0 net/socket.c:2577
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f7c302c93d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc25172458 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f7c302c93d9
RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000003
RBP: 00000000000f4240 R08: 0000000000000000 R09: 00007ffc251724c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc251724c0
R13: 000000000001647b R14: 00007ffc2517248c R15: 0000000000000003
 </TASK>