rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10500 ticks this GP) idle=c3d4/0/0x3 softirq=12780/12780 fqs=10
rcu: 	(t=10501 jiffies g=16877 q=738 ncpus=2)
rcu: rcu_preempt kthread starved for 10472 jiffies! g16877 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:R  running task     stack:28672 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+0x2c/0x70 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296
RIP: 0000:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </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: 26 Comm: kworker/1:1 Not tainted 6.5.0-rc2-syzkaller-00224-gd4a7ce642100 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Workqueue: events_power_efficient gc_worker
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:write_comp_data+0x32/0x90 kernel/kcov.c:236
Code: 89 f1 89 c6 49 89 d2 81 e6 00 01 00 00 49 89 f8 65 48 8b 14 25 80 b9 03 00 a9 00 01 ff 00 74 0e 85 f6 74 59 8b 82 04 16 00 00 <85> c0 74 4f 8b 82 e0 15 00 00 83 f8 03 75 44 48 8b 82 e8 15 00 00
RSP: 0018:ffffc900001e0bb8 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffffc9000eeaa830 RCX: ffffffff885874b7
RDX: ffff888018a51dc0 RSI: 0000000000000100 RDI: 0000000000000005
RBP: ffff8880233e6300 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 00000000802953bd R12: 0000000000000000
R13: 0000000000000000 R14: ffffed100467cc5a R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000080 CR3: 000000001f113000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 pie_calculate_probability+0x107/0x850 net/sched/sch_pie.c:324
 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 08 2a ac 8e e8 89 86 fd f8 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 c7 79 1c f9 48 85 db 58 0f 85 a4 10 00 00 <e8> 28 7e 1c f9 eb 07 e8 21 7e 1c f9 f3 90 44 8b 35 68 37 42 06 31
RSP: 0018:ffffc90000a1fbf0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888018a51dc0 RSI: ffffffff8869fe63 RDI: 0000000000000007
RBP: ffff888028400000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 1ffffffff1936249 R12: 0000000000034bd1
R13: dffffc0000000000 R14: 00000000000697a1 R15: 0000000000040000
 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2597
 process_scheduled_works kernel/workqueue.c:2664 [inline]
 worker_thread+0x896/0x1110 kernel/workqueue.c:2750
 kthread+0x33a/0x430 kernel/kthread.c:389
 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296
RIP: 0000:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.709 msecs
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.5.0-rc2-syzkaller-00224-gd4a7ce642100 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:200
Code: a6 fb 98 02 66 0f 1f 44 00 00 f3 0f 1e fa 48 8b be b0 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 <f3> 0f 1e fa 65 8b 05 cd 48 7d 7e 89 c1 48 8b 34 24 81 e1 00 01 00
RSP: 0018:ffffc90000007bb8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc9000c44e4c0 RCX: ffffffff885879fa
RDX: ffffffff8c6957c0 RSI: 0000000000000100 RDI: 0000000000000001
RBP: ffff888079809300 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc9000c44e4f8
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000022445000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 pie_vars_init include/net/pie.h:103 [inline]
 pie_calculate_probability+0x699/0x850 net/sched/sch_pie.c:412
 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:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline]
RIP: 0010:__intel_idle_hlt drivers/idle/intel_idle.c:206 [inline]
RIP: 0010:intel_idle_hlt+0x11/0x20 drivers/idle/intel_idle.c:224
Code: 48 89 de 48 c7 c7 a0 f0 3f 8d e8 9a 7d 1d fa e9 51 ff ff ff 0f 1f 44 00 00 f3 0f 1e fa 89 d0 66 90 0f 00 2d 31 6d 9c 00 fb f4 <fa> c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 89 d0 fb
RSP: 0018:ffffffff8c607da0 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffe8ffffc09a50 RCX: ffffffff8a32276e
RDX: 0000000000000001 RSI: ffffffff8d3ff220 RDI: ffffe8ffffc09a50
RBP: ffffffff8d3ff220 R08: 0000000000000001 R09: ffffed1017306d9d
R10: ffff8880b9836ceb R11: 0000000000000000 R12: 0000000000000001
R13: ffffffff8d3ff2a0 R14: 0000000000000001 R15: 0000000000000000
 cpuidle_enter_state+0x82/0x500 drivers/cpuidle/cpuidle.c:267
 cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:388
 cpuidle_idle_call kernel/sched/idle.c:215 [inline]
 do_idle+0x315/0x3f0 kernel/sched/idle.c:282
 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:379
 rest_init+0x16f/0x2b0 init/main.c:726
 arch_call_rest_init+0x13/0x30 init/main.c:823
 start_kernel+0x39f/0x480 init/main.c:1068
 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:556
 x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:537
 secondary_startup_64_no_verify+0x167/0x16b
 </TASK>