rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=feac/1/0x4000000000000000 softirq=75733/75734 fqs=2
rcu: 	(detected by 1, t=10506 jiffies, g=90953, q=462 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11254 Comm: syz-executor Not tainted 6.14.0-rc1-syzkaller-00081-gbb066fe812d6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:230 [inline]
RIP: 0010:mark_lock+0x81/0x360 kernel/locking/lockdep.c:4729
Code: be 01 00 00 00 89 e9 41 d3 e6 49 8d 5f 20 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 3a 02 00 00 8b 1b 81 e3 ff 1f 00 00 <48> 89 d8 48 c1 e8 06 48 8d 3c c5 40 98 2f 94 be 08 00 00 00 e8 96
RSP: 0018:ffffc900000078e8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000008
RDX: 0000000000000008 RSI: ffff888027208c30 RDI: ffff888027208000
RBP: 0000000000000008 R08: ffffffff942f9847 R09: 1ffffffff285f308
R10: dffffc0000000000 R11: fffffbfff285f309 R12: ffff888027208ad4
R13: dffffc0000000000 R14: 0000000000000100 R15: ffff888027208c30
FS:  000055557931e500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2cb15ff8 CR3: 000000004f422000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 mark_usage kernel/locking/lockdep.c:4672 [inline]
 __lock_acquire+0xc3e/0x2100 kernel/locking/lockdep.c:5182
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 debug_object_deactivate+0x158/0x390 lib/debugobjects.c:873
 debug_hrtimer_deactivate kernel/time/hrtimer.c:460 [inline]
 debug_deactivate+0x1b/0x220 kernel/time/hrtimer.c:502
 __run_hrtimer kernel/time/hrtimer.c:1769 [inline]
 __hrtimer_run_queues+0x305/0xd30 kernel/time/hrtimer.c:1865
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x112/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:vm_normal_page+0xa7/0x200 mm/memory.c:654
Code: 0e 4c 89 ef 48 89 de e8 d7 10 b4 ff 49 39 dd 0f 87 ac 00 00 00 48 8b 1d c7 0b 10 0e 48 89 df 4c 89 ee e8 bc 10 b4 ff 4c 39 eb <0f> 84 ad 00 00 00 e8 4e 0e b4 ff 49 c1 e5 06 48 bb 00 00 00 00 00
RSP: 0018:ffffc90003287288 EFLAGS: 00000283
RAX: 0000000000000000 RBX: 00000000000131dd RCX: ffff888027208000
RDX: 0000000000000000 RSI: 000000000006afb1 RDI: 00000000000131dd
RBP: ffffc90003287601 R08: ffffffff820b4fc4 R09: 1ffffffff2036a4e
R10: dffffc0000000000 R11: fffffbfff2036a4f R12: 800000006afb1007
R13: 000000000006afb1 R14: 00007fd1dd11f000 R15: ffff888050a414d8
 copy_present_ptes mm/memory.c:989 [inline]
 copy_pte_range mm/memory.c:1174 [inline]
 copy_pmd_range+0x9ef/0x77a0 mm/memory.c:1262
 copy_pud_range mm/memory.c:1299 [inline]
 copy_p4d_range mm/memory.c:1323 [inline]
 copy_page_range+0x99f/0xe90 mm/memory.c:1421
 dup_mmap kernel/fork.c:748 [inline]
 dup_mm kernel/fork.c:1700 [inline]
 copy_mm+0x1269/0x2160 kernel/fork.c:1752
 copy_process+0x1845/0x3d50 kernel/fork.c:2403
 kernel_clone+0x226/0x8e0 kernel/fork.c:2815
 __do_sys_clone kernel/fork.c:2958 [inline]
 __se_sys_clone kernel/fork.c:2942 [inline]
 __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2942
 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: 0033:0x7fd1de983653
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffcdd4c9c18 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd1de983653
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 000055557931e7d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 0000000000095eb6 R15: 00007ffcdd4c9db0
 </TASK>
rcu: rcu_preempt kthread starved for 10495 jiffies! g90953 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:25584 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6764
 __schedule_loop kernel/sched/core.c:6841 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6856
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
 kthread+0x7ab/0x920 kernel/kthread.c:464
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 19234 Comm: syz.4.4392 Not tainted 6.14.0-rc1-syzkaller-00081-gbb066fe812d6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x1bae/0x2d30 kernel/smp.c:885
Code: 89 e6 83 e6 01 31 ff e8 b0 e8 0b 00 41 83 e4 01 4c 8b 64 24 68 75 07 e8 60 e4 0b 00 eb 41 f3 90 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 03 84 c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 3b e4 0b
RSP: 0018:ffffc9000bbc7400 EFLAGS: 00000293
RAX: dffffc0000000000 RBX: 1ffff110170c8c99 RCX: ffff888030563c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000bbc7600 R08: ffffffff81b379b0 R09: 1ffffffff285f30e
R10: dffffc0000000000 R11: fffffbfff285f30f R12: ffff8880b873fb48
R13: ffff8880b86464c8 R14: ffff8880b873fb40 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2cb0fff8 CR3: 0000000054e74000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:966 [inline]
 flush_tlb_mm_range+0x42d/0x710 arch/x86/mm/tlb.c:1054
 tlb_flush arch/x86/include/asm/tlb.h:20 [inline]
 tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:481 [inline]
 tlb_flush_mmu+0x1aa/0x680 mm/mmu_gather.c:395
 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:488
 exit_mmap+0x52a/0xd40 mm/mmap.c:1297
 __mmput+0x115/0x420 kernel/fork.c:1356
 exit_mm+0x220/0x310 kernel/exit.c:570
 do_exit+0x9ad/0x28e0 kernel/exit.c:925
 do_group_exit+0x207/0x2c0 kernel/exit.c:1087
 get_signal+0x16b2/0x1750 kernel/signal.c:3036
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xce/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7131f8cde9
Code: Unable to access opcode bytes at 0x7f7131f8cdbf.
RSP: 002b:00007f7132e9d0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f71321a5fa8 RCX: 00007f7131f8cde9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f71321a5fa8
RBP: 00007f71321a5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f71321a5fac
R13: 0000000000000000 R14: 00007ffd3efda730 R15: 00007ffd3efda818
 </TASK>