rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-...!: (1 GPs behind) idle=103/1/0x4000000000000000 softirq=102241/102243 fqs=1 rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8126/1:b..l (detected by 0, t=10502 jiffies, g=161965, q=80) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4059 Comm: syz-executor.2 Not tainted 5.16.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:get_bucket lib/debugobjects.c:493 [inline] RIP: 0010:debug_object_activate+0x10c/0x3e0 lib/debugobjects.c:659 Code: 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 89 f8 49 89 fc 49 89 f7 48 ba eb 83 b5 80 46 86 c8 61 48 c1 e8 0c 48 0f af c2 48 c1 e8 32 <48> 8d 1c c0 48 c1 e3 03 4c 8d 83 88 aa 64 90 4c 89 04 24 48 8d ab RSP: 0018:ffffc90000dc0d28 EFLAGS: 00000013 RAX: 0000000000001f25 RBX: ffff8880b9d2a500 RCX: 0000000000000000 RDX: 61c8864680b583eb RSI: ffffffff89ae0400 RDI: ffff88804b5aab40 RBP: ffff88804b5aab40 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8167122d R11: 0000000000000000 R12: ffff88804b5aab40 R13: dffffc0000000000 R14: 1ffff920001b81a7 R15: ffffffff89ae0400 FS: 0000555557497400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f59daa07558 CR3: 000000004b45d000 CR4: 0000000000350ee0 Call Trace: debug_hrtimer_activate kernel/time/hrtimer.c:420 [inline] debug_activate kernel/time/hrtimer.c:475 [inline] enqueue_hrtimer+0x27/0x3e0 kernel/time/hrtimer.c:1084 __run_hrtimer kernel/time/hrtimer.c:1702 [inline] __hrtimer_run_queues+0xb02/0xe50 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__sanitizer_cov_trace_const_cmp4+0xc/0x70 kernel/kcov.c:286 Code: 00 00 00 48 89 7c 30 e8 48 89 4c 30 f0 4c 89 54 d8 20 48 89 10 5b c3 0f 1f 80 00 00 00 00 41 89 f8 bf 03 00 00 00 4c 8b 14 24 <89> f1 65 48 8b 34 25 40 70 02 00 e8 14 f9 ff ff 84 c0 74 4b 48 8b RSP: 0018:ffffc9000568f8d8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000003 RDX: ffff88804bba9d00 RSI: 0000000000000000 RDI: 0000000000000003 RBP: ffff888070d83380 R08: 0000000000000000 R09: 0000000000000003 R10: ffffffff83a32257 R11: 0000000000000010 R12: 0000000000000010 R13: 0000000000000032 R14: dffffc0000000000 R15: 0000000000000000 tomoyo_domain_quota_is_ok+0x307/0x550 security/tomoyo/util.c:1093 tomoyo_supervisor+0x2f2/0xf00 security/tomoyo/common.c:2089 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_path_permission security/tomoyo/file.c:587 [inline] tomoyo_path_permission+0x270/0x3a0 security/tomoyo/file.c:573 tomoyo_path_perm+0x33b/0x400 security/tomoyo/file.c:838 tomoyo_path_rmdir+0x8e/0xd0 security/tomoyo/tomoyo.c:182 security_path_rmdir+0xd7/0x150 security/security.c:1149 do_rmdir+0x284/0x430 fs/namei.c:4026 __do_sys_rmdir fs/namei.c:4049 [inline] __se_sys_rmdir fs/namei.c:4047 [inline] __x64_sys_rmdir+0xc6/0x110 fs/namei.c:4047 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f14bb87d487 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 54 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffeae988b98 EFLAGS: 00000207 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007f14bb87d487 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffeae989d20 RBP: 00007ffeae988c60 R08: 0000000000000000 R09: 00007ffeae988a30 R10: 00005555574988e3 R11: 0000000000000207 R12: 00007f14bb8d7120 R13: 00007ffeae989d20 R14: 0000555557498810 R15: 00007ffeae989d60 task:kworker/u4:0 state:R running task stack:24880 pid: 8126 ppid: 2 flags:0x00004000 Workqueue: bat_events batadv_nc_worker Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6253 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6668 irqentry_exit+0x31/0x80 kernel/entry/common.c:425 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5605 Code: b3 a5 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 83 7c 24 08 00 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:ffffc9000523fba0 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff92000a47f76 RCX: 6a3f9c55cec38b9d RDX: 1ffff1100518188b RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ff72a07 R10: fffffbfff1fee540 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff8bb83b60 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:268 [inline] rcu_read_lock include/linux/rcupdate.h:688 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline] batadv_nc_worker+0x12d/0xfa0 net/batman-adv/network-coding.c:723 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 rcu: rcu_preempt kthread starved for 10500 jiffies! g161965 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:28688 pid: 14 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881 rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1955 rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2128 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 rcu: Stack dump where RCU GP kthread last ran: NMI backtrace for cpu 0 CPU: 0 PID: 12084 Comm: syz-executor.3 Not tainted 5.16.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_check_gp_kthread_starvation.cold+0x1fb/0x200 kernel/rcu/tree_stall.h:481 print_other_cpu_stall kernel/rcu/tree_stall.h:586 [inline] check_cpu_stall kernel/rcu/tree_stall.h:729 [inline] rcu_pending kernel/rcu/tree.c:3878 [inline] rcu_sched_clock_irq+0x2125/0x2200 kernel/rcu/tree.c:2597 update_process_times+0x16d/0x200 kernel/time/timer.c:1785 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline] RIP: 0010:smp_call_function_many_cond+0x452/0xc20 kernel/smp.c:969 Code: 0b 00 85 ed 74 4d 48 b8 00 00 00 00 00 fc ff df 4d 89 f4 4c 89 f5 49 c1 ec 03 83 e5 07 49 01 c4 83 c5 03 e8 80 75 0b 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 33 06 00 00 8b 43 08 31 RSP: 0018:ffffc90002bcf9d8 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff8880b9d3fca0 RCX: 0000000000000000 RDX: ffff88803a418000 RSI: ffffffff816c3540 RDI: 0000000000000003 RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff816c3566 R11: 0000000000000000 R12: ffffed10173a7f95 R13: 0000000000000001 R14: ffff8880b9d3fca8 R15: 0000000000000001 on_each_cpu_cond_mask+0x56/0xa0 kernel/smp.c:1135 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:1112 [inline] text_poke_bp_batch+0x1b3/0x560 arch/x86/kernel/alternative.c:1297 text_poke_flush arch/x86/kernel/alternative.c:1451 [inline] text_poke_flush arch/x86/kernel/alternative.c:1448 [inline] text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1458 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146 jump_label_update+0x1d5/0x430 kernel/jump_label.c:830 static_key_disable_cpuslocked+0x152/0x1b0 kernel/jump_label.c:207 static_key_disable+0x16/0x20 kernel/jump_label.c:215 tracepoint_remove_func kernel/tracepoint.c:417 [inline] tracepoint_probe_unregister+0x632/0xc30 kernel/tracepoint.c:551 trace_event_reg+0x181/0x350 kernel/trace/trace_events.c:517 perf_trace_event_unreg.isra.0+0xac/0x2b0 kernel/trace/trace_event_perf.c:162 perf_trace_destroy+0xb5/0xf0 kernel/trace/trace_event_perf.c:243 _free_event+0x2ee/0x1390 kernel/events/core.c:4982 put_event kernel/events/core.c:5076 [inline] perf_event_release_kernel+0x6f2/0x940 kernel/events/core.c:5191 perf_release+0x33/0x40 kernel/events/core.c:5201 __fput+0x286/0x9f0 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:175 [inline] exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fbf705a075b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007ffd3d3a76f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 00007fbf705a075b RDX: 00007fbf70705b00 RSI: ffffffff815bf90c RDI: 0000000000000004 RBP: 0000000000000005 R08: 0000000000000000 R09: 00007fbf70705b08 R10: 0000000000000b38 R11: 0000000000000293 R12: 00007fbf70700f60 R13: 00000000000fc076 R14: 0000000000000000 R15: 00000000000fc053 ---------------- Code disassembly (best guess): 0: 5b pop %rbx 1: 5d pop %rbp 2: 41 5c pop %r12 4: 41 5d pop %r13 6: 41 5e pop %r14 8: 41 5f pop %r15 a: c3 retq b: 48 89 f8 mov %rdi,%rax e: 49 89 fc mov %rdi,%r12 11: 49 89 f7 mov %rsi,%r15 14: 48 ba eb 83 b5 80 46 movabs $0x61c8864680b583eb,%rdx 1b: 86 c8 61 1e: 48 c1 e8 0c shr $0xc,%rax 22: 48 0f af c2 imul %rdx,%rax 26: 48 c1 e8 32 shr $0x32,%rax * 2a: 48 8d 1c c0 lea (%rax,%rax,8),%rbx <-- trapping instruction 2e: 48 c1 e3 03 shl $0x3,%rbx 32: 4c 8d 83 88 aa 64 90 lea -0x6f9b5578(%rbx),%r8 39: 4c 89 04 24 mov %r8,(%rsp) 3d: 48 rex.W 3e: 8d .byte 0x8d 3f: ab stos %eax,%es:(%rdi)