rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-...!: (1 GPs behind) idle=3cb/1/0x4000000000000000 softirq=196710/196714 fqs=2511 (detected by 1, t=10502 jiffies, g=347409, q=1658) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2933 Comm: systemd-journal Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:check_preemption_disabled+0x75/0x1c0 lib/smp_processor_id.c:55 Code: 2a 0f 1f 44 00 00 65 48 8b 04 25 28 00 00 00 48 3b 44 24 08 0f 85 52 01 00 00 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d 48 c7 04 24 00 00 00 00 9c 8f 04 24 4c 8b 24 24 bd 00 02 00 00 RSP: 0018:ffffc90000007c38 EFLAGS: 00000082 RAX: 0000000000000000 RBX: 1ffff92000000f8c RCX: ffff88807a0c0000 RDX: ffff88807a0c0000 RSI: 0000000000010003 RDI: 0000000000000000 RBP: ffffc90000007ce8 R08: ffffffff81737569 R09: fffffbfff1bf9dae R10: fffffbfff1bf9dae R11: 0000000000000000 R12: ffff8880b9a2a240 R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007f85e96c18c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0f5cd84000 CR3: 0000000019efb000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:330 [inline] rcu_is_watching+0x12/0xa0 kernel/rcu/tree.c:1121 rcu_read_lock_held_common kernel/rcu/update.c:108 [inline] rcu_read_lock_sched_held+0x6b/0x130 kernel/rcu/update.c:123 trace_hrtimer_start+0xaf/0x270 include/trace/events/timer.h:195 debug_activate kernel/time/hrtimer.c:476 [inline] enqueue_hrtimer kernel/time/hrtimer.c:1084 [inline] __run_hrtimer kernel/time/hrtimer.c:1702 [inline] __hrtimer_run_queues+0x59e/0xa60 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:85 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x84/0x2f0 mm/kasan/generic.c:189 Code: df 4d 01 ea 4d 89 d6 4d 29 ce 49 83 fe 10 7f 30 4d 85 f6 0f 84 ae 01 00 00 4c 89 cb 4c 29 d3 0f 1f 80 00 00 00 00 45 0f b6 19 <45> 84 db 0f 85 f3 01 00 00 49 ff c1 48 ff c3 75 eb e9 87 01 00 00 RSP: 0018:ffffc90002baf990 EFLAGS: 00000286 RAX: ffffc90002bafa01 RBX: fffffffffffffffc RCX: ffffffff83d93a39 RDX: 0000000000000001 RSI: 0000000000000030 RDI: ffffc90002bafad0 RBP: ffffc90002bafad0 R08: dffffc0000000000 R09: fffff52000575f5c R10: fffff52000575f60 R11: 0000000000000000 R12: 1ffff92000575f5a R13: dffffc0000000001 R14: 0000000000000006 R15: 1ffff92000575f58 memset+0x1f/0x40 mm/kasan/shadow.c:44 tomoyo_supervisor+0x119/0x1300 security/tomoyo/common.c:2065 tomoyo_audit_path_number_log security/tomoyo/file.c:235 [inline] tomoyo_path_number_perm+0x563/0x7c0 security/tomoyo/file.c:734 security_file_ioctl+0x55/0xb0 security/security.c:1541 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl+0x48/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f85e8982017 Code: 00 00 00 48 8b 05 81 7e 2b 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 51 7e 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007fffd310aad8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fffd310b050 RCX: 00007f85e8982017 RDX: 00007fffd310ab0c RSI: 000000000000541b RDI: 0000000000000005 RBP: 00007fffd310ab30 R08: 0000000000000008 R09: 0000000000000070 R10: 00007fffd311d118 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000005 R14: 00005569a673d958 R15: 0005cffa2cdca68d rcu: rcu_preempt kthread starved for 5423 jiffies! g347409 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:26576 pid: 14 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4969 [inline] __schedule+0xb72/0x1460 kernel/sched/core.c:6250 schedule+0x12b/0x1f0 kernel/sched/core.c:6323 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1881 rcu_gp_fqs_loop+0x1fd/0x770 kernel/rcu/tree.c:1955 rcu_gp_kthread+0xa5/0x350 kernel/rcu/tree.c:2128 kthread+0x468/0x490 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 rcu: Stack dump where RCU GP kthread last ran: NMI backtrace for cpu 1 CPU: 1 PID: 28158 Comm: kworker/1:17 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events bpf_prog_free_deferred Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106 nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_check_gp_kthread_starvation+0x1ff/0x270 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+0x23d5/0x2bc0 kernel/rcu/tree.c:2597 update_process_times+0x197/0x200 kernel/time/timer.c:1785 tick_sched_handle kernel/time/tick-sched.c:226 [inline] tick_sched_timer+0x27d/0x420 kernel/time/tick-sched.c:1421 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline] RIP: 0010:smp_call_function_many_cond+0xbb2/0xda0 kernel/smp.c:969 Code: 83 e6 01 31 ff e8 3e b6 0b 00 41 83 e7 01 49 bf 00 00 00 00 00 fc ff df 75 0e e8 19 b2 0b 00 eb 4c 0f 1f 80 00 00 00 00 f3 90 <42> 0f b6 04 3b 84 c0 75 11 41 f7 45 00 01 00 00 00 74 2b e8 f6 b1 RSP: 0018:ffffc9000afe7880 EFLAGS: 00000293 RAX: ffffffff817892ba RBX: 1ffff1101734830d RCX: ffff8880305f0000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000afe79c0 R08: ffffffff81789282 R09: ffffffff84386000 R10: 0000000000000009 R11: ffff8880305f0000 R12: 0000000000000000 R13: ffff8880b9a41868 R14: ffff8880b9b3a600 R15: dffffc0000000000 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1135 __purge_vmap_area_lazy+0x2bf/0x18e0 mm/vmalloc.c:1683 _vm_unmap_aliases+0x474/0x500 mm/vmalloc.c:2107 vm_remove_mappings mm/vmalloc.c:2584 [inline] __vunmap+0x75a/0xa70 mm/vmalloc.c:2611 bpf_jit_free+0x90/0x180 process_one_work+0x853/0x1140 kernel/workqueue.c:2298 worker_thread+0xac1/0x1320 kernel/workqueue.c:2445 kthread+0x468/0x490 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 5: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax c: 00 00 e: 48 3b 44 24 08 cmp 0x8(%rsp),%rax 13: 0f 85 52 01 00 00 jne 0x16b 19: 89 d8 mov %ebx,%eax 1b: 48 83 c4 10 add $0x10,%rsp 1f: 5b pop %rbx 20: 41 5c pop %r12 22: 41 5d pop %r13 24: 41 5e pop %r14 26: 41 5f pop %r15 28: 5d pop %rbp * 29: c3 retq <-- trapping instruction 2a: 48 c7 04 24 00 00 00 movq $0x0,(%rsp) 31: 00 32: 9c pushfq 33: 8f 04 24 popq (%rsp) 36: 4c 8b 24 24 mov (%rsp),%r12 3a: bd 00 02 00 00 mov $0x200,%ebp