RAX: ffffffffffffffda RBX: 00007fa7269c76d4 RCX: 0000000000455ab9 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000014 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000015 R13: 00000000004c10e8 R14: 00000000004d1788 R15: 0000000000000003 INFO: rcu_sched detected stalls on CPUs/tasks: (detected by 1, t=100002 jiffies, g=110255, c=110254, q=106) All QSes seen, last rcu_sched kthread activity 100002 (4295372236-4295272234), jiffies_till_next_fqs=3, root ->qsmask 0x0 syz-executor6 R running task 60160 27681 4616 0x0000000a Call Trace: sched_show_task+0x610/0x760 kernel/sched/core.c:5332 print_other_cpu_stall kernel/rcu/tree.c:1441 [inline] check_cpu_stall kernel/rcu/tree.c:1559 [inline] __rcu_pending kernel/rcu/tree.c:3244 [inline] rcu_pending kernel/rcu/tree.c:3291 [inline] rcu_check_callbacks+0x2632/0x29a0 kernel/rcu/tree.c:2646 update_process_times+0x132/0x1a0 kernel/time/timer.c:1636 tick_sched_handle kernel/time/tick-sched.c:164 [inline] tick_sched_timer+0x3bf/0x520 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0xc74/0x1680 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x451/0x13c0 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt+0x6b/0x250 arch/x86/kernel/apic/apic.c:1025 smp_apic_timer_interrupt+0x5a/0x90 arch/x86/kernel/apic/apic.c:1053 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:868 RIP: 0010:rep_nop arch/x86/include/asm/processor.h:658 [inline] RIP: 0010:cpu_relax arch/x86/include/asm/processor.h:663 [inline] RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0x357/0x500 kernel/smp.c:302 Code: 85 93 00 00 00 e8 89 c5 12 00 e9 be 00 00 00 8b 3a e8 1d 74 6e 00 45 85 f6 74 91 41 89 de eb 08 0f 1f 00 e8 6b c5 12 00 f3 90 <8b> 5c 24 58 4c 89 e7 e8 dd 69 6e 00 8b 00 83 e0 01 83 e3 01 85 c0 RSP: 0000:ffff8800a9d0f620 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffffffff815565a5 RBX: 0000000000000001 RCX: ffff880128a6d880 RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea0003fae5a0 RBP: ffff8800a9d0f6f8 R08: 0000000000000000 R09: 0000000000000002 R10: 0000000000000000 R11: ffffffff8117d090 R12: ffff8800a9d0f678 R13: 0000000000000000 R14: 0000000000000000 R15: ffff880128a6e180 smp_call_function_many+0x672/0xe30 kernel/smp.c:434 native_flush_tlb_others+0x4e9/0x510 arch/x86/mm/tlb.c:595 flush_tlb_mm_range+0x358/0x490 arch/x86/mm/tlb.c:644 flush_tlb_page arch/x86/include/asm/tlbflush.h:526 [inline] ptep_clear_flush+0x11c/0x1f0 mm/pgtable-generic.c:87 wp_page_copy+0x1696/0x24f0 mm/memory.c:2538 do_wp_page+0xe8d/0x2fb0 include/linux/spinlock_api_smp.h:152 handle_pte_fault mm/memory.c:3990 [inline] __handle_mm_fault mm/memory.c:4098 [inline] handle_mm_fault+0x35bf/0x85e0 mm/memory.c:4135 __do_page_fault+0xa76/0x1810 arch/x86/mm/fault.c:1397 do_page_fault+0x98/0xd0 arch/x86/mm/fault.c:1474 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1169 RIP: 0033:0x4071ba Code: 83 c4 28 c3 bf ea ab 4b 00 31 c0 e8 b0 9d ff ff e8 9b 22 05 00 90 66 2e 0f 1f 84 00 00 00 00 00 53 c6 07 01 48 89 fb 89 77 04 47 39 01 48 83 c7 24 c7 47 fc 00 00 00 00 c7 07 00 00 00 00 e8 RSP: 002b:0000000000a3e8e0 EFLAGS: 00010246 RAX: 000000000000000e RBX: 000000000072bff0 RCX: ffffffffffffffff RDX: 0000000000000000 RSI: 0000000000000002 RDI: 000000000072bff0 RBP: 0000000000000025 R08: 0000000000000003 R09: 0000000000a3ea30 R10: 0000000000a3e930 R11: 0000000000000246 R12: 000000000000000d R13: 0000000000a3ea30 R14: 000000000072c014 R15: 0000000000000002 rcu_sched kthread starved for 100002 jiffies! g110255 c110254 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 RCU grace-period kthread stack dump: rcu_sched R running task 61768 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2857 [inline] __schedule+0x652/0x780 kernel/sched/core.c:3507 schedule+0x1cc/0x300 kernel/sched/core.c:3551 schedule_timeout+0x416/0x5b0 kernel/time/timer.c:1801 rcu_gp_kthread+0x1ed1/0x3a40 kernel/rcu/tree.c:2179 kthread+0x473/0x4b0 kernel/kthread.c:247 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:415