rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P30216/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=163165, q=50 ncpus=2)
task:syz-executor.1 state:R running task stack:27200 pid:30216 tgid:30216 ppid:22541 flags:0x00004002
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:649
RIP: 0010:lock_acquire+0x1ef/0x520 kernel/locking/lockdep.c:5722
Code: c1 05 4d 95 9b 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc900045b7830 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920008b6f08 RCX: 000000005bbd8464
RDX: 0000000000000001 RSI: ffffffff8acca240 RDI: ffffffff8b2ed2a0
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff23e1fd0
R10: ffffffff91f0fe87 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8cfa7d60 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
rcu_read_lock include/linux/rcupdate.h:747 [inline]
page_ext_get+0x3a/0x310 mm/page_ext.c:508
__reset_page_owner+0x2f/0x190 mm/page_owner.c:145
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1137 [inline]
free_unref_page_prepare+0x4fa/0xaa0 mm/page_alloc.c:2347
free_unref_page_list+0xe6/0xb40 mm/page_alloc.c:2533
release_pages+0x32a/0x14f0 mm/swap.c:1042
tlb_batch_pages_flush+0x9a/0x190 mm/mmu_gather.c:98
tlb_flush_mmu_free mm/mmu_gather.c:293 [inline]
tlb_flush_mmu mm/mmu_gather.c:300 [inline]
tlb_finish_mmu+0x14b/0x6f0 mm/mmu_gather.c:392
exit_mmap+0x38b/0xa70 mm/mmap.c:3321
__mmput+0x12a/0x4d0 kernel/fork.c:1349
mmput+0x62/0x70 kernel/fork.c:1371
exit_mm kernel/exit.c:567 [inline]
do_exit+0x9a5/0x2ad0 kernel/exit.c:856
do_group_exit+0xd4/0x2a0 kernel/exit.c:1018
__do_sys_exit_group kernel/exit.c:1029 [inline]
__se_sys_exit_group kernel/exit.c:1027 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1027
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fa51947cce9
RSP: 002b:00007ffee5bacf28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007fa51947cce9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000129 R09: 0000000000000000
R10: 0000001b2ce20000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g163165 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=235963
rcu: rcu_preempt kthread starved for 10502 jiffies! g163165 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:28304 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: 10964 Comm: kworker/1:5 Not tainted 6.7.0-rc6-syzkaller-00044-g1a44b0073b92 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events_freezable_power_ sync_hw_clock
RIP: 0010:preempt_count_sub+0x4/0x160 kernel/sched/core.c:5865
Code: 00 00 00 00 66 90 f3 0f 1e fa 48 c7 c7 e0 5f b4 90 e9 f0 40 5a 00 f3 0f 1e fa 48 c7 c7 e0 5f b4 90 e9 d0 2b 5a 00 f3 0f 1e fa <48> c7 c0 e0 e5 7f 92 53 89 fb 48 ba 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffffc900003f8cf0 EFLAGS: 00000046
RAX: 0000000000000046 RBX: ffffffff929dc638 RCX: ffffffff81675b83
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: 0000000000000001
RBP: 0000000000000002 R08: 0000000000000000 R09: fffffbfff253b8c7
R10: ffffffff929dc63b R11: 0000000000000003 R12: 0000000000000003
R13: ffff88808dbad340 R14: ffffffff8acf1fc0 R15: 1ffff9200007f1a6
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555569b8d8 CR3: 000000005f9ed000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x3b/0x70 kernel/locking/spinlock.c:194
debug_object_activate+0x27f/0x490 lib/debugobjects.c:745
debug_hrtimer_activate kernel/time/hrtimer.c:422 [inline]
debug_activate kernel/time/hrtimer.c:477 [inline]
enqueue_hrtimer+0x23/0x310 kernel/time/hrtimer.c:1087
__run_hrtimer kernel/time/hrtimer.c:1705 [inline]
__hrtimer_run_queues+0xa12/0xc20 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
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:649
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x70 kernel/locking/spinlock.c:194
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 86 47 e4 f6 48 89 df e8 ee be e4 f6 f7 c5 00 02 00 00 75 1f 9c 58 f6 c4 02 75 2f 01 00 00 00 e8 25 78 d6 f6 65 8b 05 a6 20 81 75 85 c0 74 12 5b
RSP: 0018:ffffc90004737bb8 EFLAGS: 00000246
RAX: 0000000000000006 RBX: ffff8880b992b940 RCX: 1ffffffff23f973e
RDX: 0000000000000000 RSI: ffffffff8acc9f40 RDI: ffffffff8b2ed2a0
RBP: 0000000000000246 R08: 0000000000000001 R09: fffffbfff23e2009
R10: ffffffff91f1004f R11: 0000000000000001 R12: 197f932f1a091300
R13: 000000001dcd6500 R14: 0000000225c17d03 R15: 197f932ec0a0e400
hrtimer_start include/linux/hrtimer.h:418 [inline]
sched_sync_hw_clock kernel/time/ntp.c:519 [inline]
sync_hw_clock+0x34a/0x510 kernel/time/ntp.c:660
process_one_work+0x886/0x15d0 kernel/workqueue.c:2627
process_scheduled_works kernel/workqueue.c:2700 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781
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