INFO: rcu_sched detected stalls on CPUs/tasks: (detected by 1, t=120002 jiffies, g=14455, c=14454, q=298) All QSes seen, last rcu_sched kthread activity 120002 (4294874830-4294754828), jiffies_till_next_fqs=3, root ->qsmask 0x0 syz-executor0 R running task 58384 6796 4562 0x8000000a Call Trace: sched_show_task+0x600/0x730 kernel/sched/core.c:5279 print_other_cpu_stall kernel/rcu/tree.c:1480 [inline] check_cpu_stall kernel/rcu/tree.c:1598 [inline] __rcu_pending kernel/rcu/tree.c:3361 [inline] rcu_pending kernel/rcu/tree.c:3423 [inline] rcu_check_callbacks+0x292f/0x2cd0 kernel/rcu/tree.c:2763 update_process_times+0x132/0x1a0 kernel/time/timer.c:1636 tick_sched_handle kernel/time/tick-sched.c:162 [inline] tick_sched_timer+0x33b/0x4b0 kernel/time/tick-sched.c:1194 __run_hrtimer kernel/time/hrtimer.c:1349 [inline] __hrtimer_run_queues+0xc03/0x15d0 kernel/time/hrtimer.c:1411 hrtimer_interrupt+0x426/0xaf0 kernel/time/hrtimer.c:1469 local_apic_timer_interrupt+0x66/0x230 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:857 RIP: 0010:msan_get_shadow_origin_ptr+0x4/0x230 mm/kmsan/kmsan_instr.c:229 RSP: 0018:ffff880148ccf2e0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff12 RAX: ffffffff815134f5 RBX: 0000000000000003 RCX: ffff88014f35bb00 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff880148ccf378 RBP: ffff880148ccf2e0 R08: 0000000000000000 R09: 0000000000000002 R10: 0000000000000000 R11: 0000000000100000 R12: ffff880148ccf378 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8b314000 __msan_metadata_ptr_for_load_4+0x10/0x20 mm/kmsan/kmsan_instr.c:320 csd_lock_wait kernel/smp.c:108 [inline] smp_call_function_single+0x373/0x4f0 kernel/smp.c:302 smp_call_function_many+0x65d/0xde0 kernel/smp.c:434 on_each_cpu_mask kernel/smp.c:632 [inline] on_each_cpu_cond+0x325/0x3f0 kernel/smp.c:684 invalidate_bh_lrus+0x54/0x60 fs/buffer.c:1415 kill_bdev fs/block_dev.c:85 [inline] __blkdev_put+0x43a/0xc80 fs/block_dev.c:1782 blkdev_put+0x435/0x570 fs/block_dev.c:1850 blkdev_close+0xa6/0xf0 fs/block_dev.c:1857 __fput+0x49e/0xa10 fs/file_table.c:209 ____fput+0x37/0x40 fs/file_table.c:243 task_work_run+0x243/0x2c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x10e1/0x38d0 kernel/exit.c:867 do_group_exit+0x1a0/0x360 kernel/exit.c:970 get_signal+0x1320/0x1f20 kernel/signal.c:2469 do_signal+0xb8/0x1c80 arch/x86/kernel/signal.c:809 exit_to_usermode_loop arch/x86/entry/common.c:162 [inline] prepare_exit_to_usermode+0x271/0x3a0 arch/x86/entry/common.c:196 syscall_return_slowpath+0xe9/0x700 arch/x86/entry/common.c:265 ret_from_fork+0x15/0x40 arch/x86/entry/entry_64.S:399 RIP: 0033:0x458309 RSP: 002b:00007fd651a88db0 EFLAGS: 00000202 ORIG_RAX: 0000000000000038 RAX: 0000000000000000 RBX: 00007fd651a89700 RCX: 0000000000458309 RDX: 00007fd651a899d0 RSI: 00007fd651a88db0 RDI: 00000000003d0f00 RBP: 0000000000a3e8a0 R08: 00007fd651a89700 R09: 00007fd651a89700 R10: 00007fd651a899d0 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000a3e81f R14: 00007fd651a899c0 R15: 0000000000000002 rcu_sched kthread starved for 120002 jiffies! g14455 c14454 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 rcu_sched R running task 61968 8 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2866 [inline] __schedule+0x674/0x730 kernel/sched/core.c:3446 schedule+0x1cc/0x2f0 kernel/sched/core.c:3505 schedule_timeout+0x3e7/0x570 kernel/time/timer.c:1801 rcu_gp_kthread+0x21e1/0x38d0 kernel/rcu/tree.c:2230 kthread+0x539/0x720 kernel/kthread.c:239 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:406