rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5104/1:b..l P5154/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=17829, q=349 ncpus=2)
task:kworker/0:4 state:R running task stack:25184 pid:5154 tgid:5154 ppid:2 flags:0x00004000
Workqueue: events_power_efficient gc_worker
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:7008
irqentry_exit+0x36/0x80 kernel/entry/common.c:432
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__sanitizer_cov_trace_pc+0x34/0x60 kernel/kcov.c:207
Code: bd 03 00 65 8b 05 94 3c 7d 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 35 8b 82 fc 15 00 00 85 c0 74 2b 8b 82 d8 15 00 00 <83> f8 02 75 20 48 8b 8a e0 15 00 00 8b 92 dc 15 00 00 48 8b 01 48
RSP: 0018:ffffc9000402fbe8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff88b2138f
RDX: ffff888077a5e1c0 RSI: ffffffff88b21a11 RDI: 0000000000000005
RBP: ffff888026800000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000003 R12: 0000000000000a34
R13: dffffc0000000000 R14: 0000000000001469 R15: 0000000000040000
rcu_read_unlock include/linux/rcupdate.h:776 [inline]
gc_worker+0xa01/0x17e0 net/netfilter/nf_conntrack_core.c:1565
process_one_work+0x886/0x15d0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
task:syz-executor.2 state:R running task stack:23600 pid:5104 tgid:5104 ppid:5088 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6865
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
_raw_spin_unlock_irq+0x40/0x50 kernel/locking/spinlock.c:202
bdi_split_work_to_wbs+0x3d5/0xfa0 fs/fs-writeback.c:994
__writeback_inodes_sb_nr+0x1d0/0x270 fs/fs-writeback.c:2671
sync_filesystem+0xb6/0x280 fs/sync.c:54
generic_shutdown_super+0x7e/0x3d0 fs/super.c:669
kill_block_super+0x3b/0x90 fs/super.c:1667
deactivate_locked_super+0xbc/0x1a0 fs/super.c:484
deactivate_super+0xde/0x100 fs/super.c:517
cleanup_mnt+0x222/0x450 fs/namespace.c:1256
task_work_run+0x14d/0x240 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x217/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296
do_syscall_64+0x4d/0x110 arch/x86/entry/common.c:88
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fcd3287de17
RSP: 002b:00007fff5855b778 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fcd3287de17
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007fff5855b830
RBP: 00007fff5855b830 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff5855c8f0
R13: 00007fcd328c73b9 R14: 00000000000436d2 R15: 0000000000000002
rcu: rcu_preempt kthread starved for 10550 jiffies! g17829 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:28240 pid:16 tgid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
schedule_timeout+0x137/0x290 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x1ec/0xb10 kernel/rcu/tree.c:1631
rcu_gp_kthread+0x24b/0x380 kernel/rcu/tree.c:1830
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
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: 5811 Comm: syz-executor.3 Not tainted 6.7.0-rc4-syzkaller-00009-gbee0e7762ad2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:227 [inline]
RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:239 [inline]
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
RIP: 0010:hlock_class+0x4e/0x130 kernel/locking/lockdep.c:228
Code: 8e d2 00 00 00 0f b7 5b 20 66 81 e3 ff 1f 0f b7 db be 08 00 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 80 fe f0 91 e8 d2 48 76 00 <48> 0f a3 1d 0a dd 8a 10 73 0f 48 69 c3 d0 00 00 00 5b 48 05 a0 02
RSP: 0018:ffffc900003f8c68 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 000000000000004f RCX: ffffffff8166216e
RDX: fffffbfff23e1fd2 RSI: 0000000000000008 RDI: ffffffff91f0fe88
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff23e1fd1
R10: ffffffff91f0fe8f R11: 0000000000000000 R12: ffff888029a36ae8
R13: 0000000000000002 R14: 0000000000000000 R15: 000000000000004f
FS: 00007fc858e336c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc858e32f00 CR3: 0000000028585000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
check_wait_context kernel/locking/lockdep.c:4774 [inline]
__lock_acquire+0x437/0x3b20 kernel/locking/lockdep.c:5087
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719
seqcount_lockdep_reader_access include/linux/seqlock.h:102 [inline]
ktime_get_update_offsets_now+0x84/0x610 kernel/time/timekeeping.c:2317
hrtimer_update_base kernel/time/hrtimer.c:633 [inline]
hrtimer_interrupt+0x142/0x800 kernel/time/hrtimer.c:1796
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
__sysvec_apic_timer_interrupt+0x105/0x400 arch/x86/kernel/apic/apic.c:1082
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 8b 74 24 08 48 89 fb 48 83 c7 18 e8 0a 45 e4 f6 48 89 df e8 72 bc e4 f6 e8 7d 7c 0a f7 fb bf 01 00 00 00 92 75 d6 f6 65 8b 05 43 00 81 75 85 c0 74 02 5b c3 e8 d0 c3 7d
RSP: 0018:ffffc9000367fd00 EFLAGS: 00000202
RAX: 000000000303cb45 RBX: ffff8880452c09c0 RCX: 1ffffffff1e307a1
RDX: 0000000000000000 RSI: ffffffff8acca860 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8f186f97 R11: 0000000000000000 R12: ffff8880452c0e58
R13: 0000000000000021 R14: ffff8880452c0dc0 R15: 1ffff920006cffaf
spin_unlock_irq include/linux/spinlock.h:401 [inline]
get_signal+0x1899/0x2790 kernel/signal.c:2907
arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x121/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296
do_syscall_64+0x4d/0x110 arch/x86/entry/common.c:88
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fc85807cae7
Code: 14 25 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89
RSP: 002b:00007fc858e330c8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007fc85819bf80 RCX: 00007fc85807cae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fc8580c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fc85819bf80 R15: 00007ffc96219d28