rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=099c/1/0x4000000000000000 softirq=26746/26746 fqs=0
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P11319/1:b..l P11320/1:b..l
rcu: 	(detected by 1, t=10506 jiffies, g=39485, q=323 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11324 Comm: syz.1.2662 Not tainted 6.11.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:227 [inline]
RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3780 [inline]
RIP: 0010:validate_chain+0x108/0x5900 kernel/locking/lockdep.c:3836
Code: b6 04 20 84 c0 0f 85 fc 4c 00 00 41 8b 5d 00 89 d8 25 00 80 04 00 3d 00 00 04 00 0f 85 7b 04 00 00 81 e3 ff 1f 00 00 48 89 d8 <48> c1 e8 06 48 8d 3c c5 40 48 4f 93 be 08 00 00 00 e8 52 27 87 00
RSP: 0018:ffffc90000007720 EFLAGS: 00000006
RAX: 000000000000096f RBX: 000000000000096f RCX: 1ffff92000000f04
RDX: 0000000000000001 RSI: ffff88806a8728e0 RDI: ffff88806a871e00
RBP: ffffc90000007a20 R08: ffffffff934f496f R09: 1ffffffff269e92d
R10: dffffc0000000000 R11: fffffbfff269e92e R12: dffffc0000000000
R13: ffff88806a872900 R14: b1bd3135ec09def9 R15: ffff88806a872900
FS:  00007f7c1ecf66c0(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31e1eff8 CR3: 000000002ecd0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __lock_acquire+0x137a/0x2040 kernel/locking/lockdep.c:5142
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 advance_sched+0xab/0xca0 net/sched/sch_taprio.c:924
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
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 89 fb 48 83 c7 18 48 8b 74 24 08 e8 5a c2 b7 f5 48 89 df e8 32 05 b9 f5 e8 dd bc e2 f5 fb bf 01 00 00 00 <e8> 42 d0 aa f5 65 8b 05 b3 a4 4b 74 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc900038f7d00 EFLAGS: 00000286
RAX: ab1cce28b4954e00 RBX: ffff8880605e7088 RCX: ffffffff94cec903
RDX: dffffc0000000000 RSI: ffffffff8bead540 RDI: 0000000000000001
RBP: 00000000ffffff83 R08: ffffffff8ff6c4ef R09: 1ffffffff1fed89d
R10: dffffc0000000000 R11: fffffbfff1fed89e R12: ffff8880605e7000
R13: 7fffffffffffffff R14: ffff8880605e7080 R15: 0000000000000003
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 do_timerfd_settime+0xd33/0x1020 fs/timerfd.c:537
 __do_sys_timerfd_settime fs/timerfd.c:583 [inline]
 __se_sys_timerfd_settime fs/timerfd.c:574 [inline]
 __x64_sys_timerfd_settime+0x16f/0x220 fs/timerfd.c:574
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7c1df79e79
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7c1ecf6038 EFLAGS: 00000246 ORIG_RAX: 000000000000011e
RAX: ffffffffffffffda RBX: 00007f7c1e115f80 RCX: 00007f7c1df79e79
RDX: 0000000020000000 RSI: 0000000000000003 RDI: 0000000000000003
RBP: 00007f7c1dfe7916 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7c1e115f80 R15: 00007ffe9c95cf18
 </TASK>
task:syz.3.2663      state:R  running task     stack:23376 pid:11320 tgid:11320 ppid:5216   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6708
 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6732
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
 unwind_next_frame+0x2124/0x2a00 arch/x86/kernel/unwind_orc.c:672
 arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 save_stack+0xfb/0x1f0 mm/page_owner.c:156
 __reset_page_owner+0x76/0x430 mm/page_owner.c:297
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1094 [inline]
 free_unref_folios+0x100f/0x1ac0 mm/page_alloc.c:2660
 folios_put_refs+0x76e/0x860 mm/swap.c:1039
 free_pages_and_swap_cache+0x2ea/0x690 mm/swap_state.c:332
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
 tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373
 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:465
 exit_mmap+0x44f/0xc80 mm/mmap.c:3425
 __mmput+0x115/0x380 kernel/fork.c:1345
 exit_mm+0x220/0x310 kernel/exit.c:571
 do_exit+0x9b2/0x27f0 kernel/exit.c:869
 do_group_exit+0x207/0x2c0 kernel/exit.c:1031
 __do_sys_exit_group kernel/exit.c:1042 [inline]
 __se_sys_exit_group kernel/exit.c:1040 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1040
 x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb333379e79
RSP: 002b:00007fff07af1d48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb333379e79
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fff07af1d9c R08: 00007fff07af1e2f R09: 000000000003c3b6
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000032
R13: 000000000003c3b6 R14: 000000000003c343 R15: 00007fff07af1df0
 </TASK>
task:syz.4.2660      state:R  running task     stack:23800 pid:11319 tgid:11314 ppid:5214   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:seqcount_lockdep_reader_access+0x1e0/0x220 include/linux/seqlock.h:75
Code: 00 4d 85 ed 75 16 e8 df 6b 12 00 eb 15 e8 d8 6b 12 00 e8 33 fc 2c 0a 4d 85 ed 74 ea e8 c9 6b 12 00 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 66 43 c7 44 3c 09 00 00 43 c6 44 3c 0b 00
RSP: 0018:ffffc90003e9f760 EFLAGS: 00000246
RAX: ffffffff81811e97 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc9000aa95000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc90003e9f818 R08: ffffffff81811e6d R09: 1ffffffff1fed89d
R10: dffffc0000000000 R11: fffffbfff1fed89e R12: dffffc0000000000
R13: 0000000000000200 R14: 0000000000000046 R15: 1ffff920007d3eec
 timekeeping_debug_get_ns kernel/time/timekeeping.c:256 [inline]
 timekeeping_get_ns+0x5c/0x420 kernel/time/timekeeping.c:401
 ktime_get+0x89/0xb0 kernel/time/timekeeping.c:850
 ktime_get_ns include/linux/timekeeping.h:169 [inline]
 bpf_test_timer_continue+0x20f/0x350 net/bpf/test_run.c:83
 bpf_test_run+0x594/0xa90 net/bpf/test_run.c:437
 bpf_prog_test_run_skb+0xc97/0x1820 net/bpf/test_run.c:1094
 bpf_prog_test_run+0x33a/0x3b0 kernel/bpf/syscall.c:4313
 __sys_bpf+0x48d/0x810 kernel/bpf/syscall.c:5728
 __do_sys_bpf kernel/bpf/syscall.c:5817 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5815 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5815
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0ea9979e79
RSP: 002b:00007f0eaa70b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f0ea9b16058 RCX: 00007f0ea9979e79
RDX: 0000000000000050 RSI: 0000000020000080 RDI: 000000000000000a
RBP: 00007f0ea99e7916 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0ea9b16058 R15: 00007ffdb2655da8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g39485 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=19325
rcu: rcu_preempt kthread starved for 10506 jiffies! g39485 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:25816 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>