rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (10500 ticks this GP) idle=50f4/1/0x4000000000000000 softirq=13887/13887 fqs=0
rcu: (t=10500 jiffies g=17813 q=665 ncpus=2)
rcu: rcu_preempt kthread starved for 10500 jiffies! g17813 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0xee1/0x59f0 kernel/sched/core.c:6709
schedule+0xe7/0x1b0 kernel/sched/core.c:6785
schedule_timeout+0x157/0x2c0 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x1ec/0xa50 kernel/rcu/tree.c:1613
rcu_gp_kthread+0x249/0x380 kernel/rcu/tree.c:1812
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
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 5087 Comm: kworker/0:3 Not tainted 6.5.0-rc2-next-20230718-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
Workqueue: events_power_efficient gc_worker
RIP: 0010:pie_calculate_probability+0x66/0x850 net/sched/sch_pie.c:309
Code: fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 53 07 00 00 48 89 da 44 0f b6 65 1a 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 68 07 00 00 48 8b 03 31 ff 44 89 e6 48 89 04 24 e8 83 16 2c
RSP: 0018:ffffc90000007bc0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffc9000f7740a0 RCX: 0000000000000100
RDX: 1ffff92001eee814 RSI: ffffffff885ab181 RDI: ffff88807c04bb1a
RBP: ffff88807c04bb00 R08: 0000000000000004 R09: 000000000000f99d
R10: 0000000000003526 R11: 000000000000004e R12: 0000000000000000
R13: 0000000000000007 R14: ffffed100f80975a R15: 000000000000f99d
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000006a5fe000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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
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 ef ac 8e e8 e9 8b fb f8 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 a7 97 1a f9 48 85 db 58 0f 85 a4 10 00 00 08 9c 1a f9 eb 07 e8 01 9c 1a f9 f3 90 44 8b 35 c8 bd 40 06 31
RSP: 0018:ffffc90003defbf0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801a7bbb80 RSI: ffffffff886c3d03 RDI: 0000000000000007
RBP: ffff88801b400000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000026c88
R13: dffffc0000000000 R14: 000000000004d90f R15: 0000000000040000
process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600
worker_thread+0x687/0x1110 kernel/workqueue.c:2751
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
CPU: 0 PID: 5087 Comm: kworker/0:3 Not tainted 6.5.0-rc2-next-20230718-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
Workqueue: events_power_efficient gc_worker
RIP: 0010:pie_calculate_probability+0x66/0x850 net/sched/sch_pie.c:309
Code: fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 53 07 00 00 48 89 da 44 0f b6 65 1a 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 68 07 00 00 48 8b 03 31 ff 44 89 e6 48 89 04 24 e8 83 16 2c
RSP: 0018:ffffc90000007bc0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffc9000f7740a0 RCX: 0000000000000100
RDX: 1ffff92001eee814 RSI: ffffffff885ab181 RDI: ffff88807c04bb1a
RBP: ffff88807c04bb00 R08: 0000000000000004 R09: 000000000000f99d
R10: 0000000000003526 R11: 000000000000004e R12: 0000000000000000
R13: 0000000000000007 R14: ffffed100f80975a R15: 000000000000f99d
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000006a5fe000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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
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 ef ac 8e e8 e9 8b fb f8 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 a7 97 1a f9 48 85 db 58 0f 85 a4 10 00 00 08 9c 1a f9 eb 07 e8 01 9c 1a f9 f3 90 44 8b 35 c8 bd 40 06 31
RSP: 0018:ffffc90003defbf0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801a7bbb80 RSI: ffffffff886c3d03 RDI: 0000000000000007
RBP: ffff88801b400000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000026c88
R13: dffffc0000000000 R14: 000000000004d90f R15: 0000000000040000
process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600
worker_thread+0x687/0x1110 kernel/workqueue.c:2751
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