------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.12.0-syzkaller-g7b1d1d4cfac0 #0 Not tainted
------------------------------------------------------
syz.4.286/7692 is trying to acquire lock:
ffff80008f98cb00 (console_owner){-.-.}-{0:0}, at: console_lock_spinning_enable+0x88/0xec kernel/printk/printk.c:1901

but task is already holding lock:
ffff0001b3655918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2c/0x44 kernel/sched/core.c:598

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&rq->__lock){-.-.}-{2:2}:
       _raw_spin_lock_nested+0x50/0x6c kernel/locking/spinlock.c:378
       raw_spin_rq_lock_nested kernel/sched/core.c:598 [inline]
       raw_spin_rq_lock kernel/sched/sched.h:1506 [inline]
       task_rq_lock+0xc8/0x2a8 kernel/sched/core.c:700
       cgroup_move_task+0xa0/0x468 kernel/sched/psi.c:1161
       css_set_move_task+0x6c0/0x8d4 kernel/cgroup/cgroup.c:898
       cgroup_post_fork+0x1d4/0x68c kernel/cgroup/cgroup.c:6692
       copy_process+0x2ee8/0x3250 kernel/fork.c:2600
       kernel_clone+0x1d8/0x82c kernel/fork.c:2786
       user_mode_thread+0x110/0x178 kernel/fork.c:2864
       rest_init+0x2c/0x2f4 init/main.c:712
       start_kernel+0x3f4/0x4f4 init/main.c:1105
       __primary_switched+0x8c/0x94 arch/arm64/kernel/head.S:246

-> #3 (&p->pi_lock){-.-.}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162
       class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline]
       try_to_wake_up+0xd8/0x1274 kernel/sched/core.c:4165
       default_wake_function+0x4c/0x60 kernel/sched/core.c:7027
       woken_wake_function+0x48/0x78 kernel/sched/wait.c:444
       __wake_up_common kernel/sched/wait.c:89 [inline]
       __wake_up_common_lock kernel/sched/wait.c:106 [inline]
       __wake_up+0x12c/0x1b0 kernel/sched/wait.c:127
       tty_wakeup+0xd8/0xec drivers/tty/tty_io.c:521
       pty_unthrottle+0x3c/0x8c drivers/tty/pty.c:95
       tty_unthrottle_safe+0xf8/0x17c drivers/tty/tty_ioctl.c:164
       n_tty_receive_buf_common+0xcfc/0x1054 drivers/tty/n_tty.c:1754
       n_tty_receive_buf2+0x40/0x54 drivers/tty/n_tty.c:1785
       tty_ldisc_receive_buf+0xa4/0x15c drivers/tty/tty_buffer.c:387
       tty_port_default_receive_buf+0x74/0xac drivers/tty/tty_port.c:37
       receive_buf drivers/tty/tty_buffer.c:445 [inline]
       flush_to_ldisc+0x284/0x6e4 drivers/tty/tty_buffer.c:495
       process_one_work+0x7bc/0x1600 kernel/workqueue.c:3229
       process_scheduled_works kernel/workqueue.c:3310 [inline]
       worker_thread+0x97c/0xeec kernel/workqueue.c:3391
       kthread+0x288/0x310 kernel/kthread.c:389
       ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862

-> #2 (&tty->write_wait){....}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162
       __wake_up_common_lock kernel/sched/wait.c:105 [inline]
       __wake_up+0x38/0x1b0 kernel/sched/wait.c:127
       tty_wakeup+0xd8/0xec drivers/tty/tty_io.c:521
       tty_port_default_wakeup+0xb0/0x120 drivers/tty/tty_port.c:69
       tty_port_tty_wakeup+0x64/0x78 drivers/tty/tty_port.c:435
       uart_write_wakeup+0x4c/0x64 drivers/tty/serial/serial_core.c:120
       pl011_tx_chars+0xa3c/0x12cc drivers/tty/serial/amba-pl011.c:1478
       pl011_start_tx_pio drivers/tty/serial/amba-pl011.c:1320 [inline]
       pl011_start_tx+0x588/0xbdc drivers/tty/serial/amba-pl011.c:1362
       __uart_start+0x294/0x3d8 drivers/tty/serial/serial_core.c:160
       uart_write+0x270/0x9b4 drivers/tty/serial/serial_core.c:635
       process_output_block drivers/tty/n_tty.c:574 [inline]
       n_tty_write+0xaec/0xed0 drivers/tty/n_tty.c:2389
       iterate_tty_write drivers/tty/tty_io.c:1015 [inline]
       file_tty_write+0x410/0x7b8 drivers/tty/tty_io.c:1090
       tty_write drivers/tty/tty_io.c:1111 [inline]
       redirected_tty_write+0xa8/0x144 drivers/tty/tty_io.c:1134
       new_sync_write fs/read_write.c:590 [inline]
       vfs_write+0x920/0xcf4 fs/read_write.c:683
       ksys_write+0x15c/0x26c fs/read_write.c:736
       __do_sys_write fs/read_write.c:748 [inline]
       __se_sys_write fs/read_write.c:745 [inline]
       __arm64_sys_write+0x7c/0x90 fs/read_write.c:745
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
       el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

-> #1 (&port_lock_key){-.-.}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162
       uart_port_lock_irqsave include/linux/serial_core.h:711 [inline]
       pl011_console_write+0x158/0xdc0 drivers/tty/serial/amba-pl011.c:2316
       console_emit_next_record kernel/printk/printk.c:3092 [inline]
       console_flush_all+0x604/0xb90 kernel/printk/printk.c:3180
       __console_flush_and_unlock kernel/printk/printk.c:3239 [inline]
       console_unlock+0x138/0x3ac kernel/printk/printk.c:3279
       vprintk_emit+0x308/0x55c kernel/printk/printk.c:2407
       vprintk_default+0xa0/0xe4 kernel/printk/printk.c:2422
       vprintk+0x200/0x300 kernel/printk/printk_safe.c:68
       _printk+0xdc/0x128 kernel/printk/printk.c:2432
       register_console+0x8f0/0xcc0 kernel/printk/printk.c:4069
       uart_configure_port drivers/tty/serial/serial_core.c:2655 [inline]
       serial_core_add_one_port drivers/tty/serial/serial_core.c:3182 [inline]
       serial_core_register_port+0x1688/0x2118 drivers/tty/serial/serial_core.c:3419
       serial_ctrl_register_port+0x28/0x38 drivers/tty/serial/serial_ctrl.c:41
       uart_add_one_port+0x28/0x38 drivers/tty/serial/serial_port.c:143
       pl011_register_port+0x1b4/0x44c drivers/tty/serial/amba-pl011.c:2744
       sbsa_uart_probe+0x488/0x608 drivers/tty/serial/amba-pl011.c:2914
       platform_probe+0x148/0x1c0 drivers/base/platform.c:1404
       really_probe+0x38c/0x8fc drivers/base/dd.c:658
       __driver_probe_device+0x194/0x374 drivers/base/dd.c:800
       driver_probe_device+0x78/0x330 drivers/base/dd.c:830
       __device_attach_driver+0x2a8/0x4f4 drivers/base/dd.c:958
       bus_for_each_drv+0x228/0x2bc drivers/base/bus.c:459
       __device_attach+0x2b4/0x434 drivers/base/dd.c:1030
       device_initial_probe+0x24/0x34 drivers/base/dd.c:1079
       bus_probe_device+0x178/0x240 drivers/base/bus.c:534
       device_add+0x728/0xa6c drivers/base/core.c:3672
       platform_device_add+0x3e8/0x6e8 drivers/base/platform.c:716
       platform_device_register_full+0x4f0/0x608 drivers/base/platform.c:844
       acpi_create_platform_device+0x5bc/0x744 drivers/acpi/acpi_platform.c:177
       acpi_default_enumeration+0x6c/0xdc drivers/acpi/scan.c:2213
       acpi_bus_attach+0x804/0xad4 drivers/acpi/scan.c:2324
       acpi_dev_for_one_check+0xa0/0xb4 drivers/acpi/bus.c:1145
       device_for_each_child+0xf0/0x180 drivers/base/core.c:4001
       acpi_dev_for_each_child+0xc4/0x108 drivers/acpi/bus.c:1157
       acpi_bus_attach+0x868/0xad4 drivers/acpi/scan.c:2329
       acpi_dev_for_one_check+0xa0/0xb4 drivers/acpi/bus.c:1145
       device_for_each_child+0xf0/0x180 drivers/base/core.c:4001
       acpi_dev_for_each_child+0xc4/0x108 drivers/acpi/bus.c:1157
       acpi_bus_attach+0x868/0xad4 drivers/acpi/scan.c:2329
       acpi_bus_scan+0x118/0x4f0 drivers/acpi/scan.c:2610
       acpi_scan_init+0x214/0x6b0 drivers/acpi/scan.c:2747
       acpi_init+0x190/0x254 drivers/acpi/bus.c:1466
       do_one_initcall+0x24c/0x9c0 init/main.c:1269
       do_initcall_level+0x154/0x214 init/main.c:1331
       do_initcalls+0x58/0xac init/main.c:1347
       do_basic_setup+0x8c/0xa0 init/main.c:1366
       kernel_init_freeable+0x324/0x478 init/main.c:1580
       kernel_init+0x24/0x2a0 init/main.c:1469
       ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862

-> #0 (console_owner){-.-.}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3161 [inline]
       check_prevs_add kernel/locking/lockdep.c:3280 [inline]
       validate_chain kernel/locking/lockdep.c:3904 [inline]
       __lock_acquire+0x33f8/0x77c8 kernel/locking/lockdep.c:5202
       lock_acquire+0x240/0x728 kernel/locking/lockdep.c:5825
       console_lock_spinning_enable+0xb4/0xec kernel/printk/printk.c:1905
       console_emit_next_record kernel/printk/printk.c:3086 [inline]
       console_flush_all+0x5c4/0xb90 kernel/printk/printk.c:3180
       __console_flush_and_unlock kernel/printk/printk.c:3239 [inline]
       console_unlock+0x138/0x3ac kernel/printk/printk.c:3279
       vprintk_emit+0x308/0x55c kernel/printk/printk.c:2407
       vprintk_default+0xa0/0xe4 kernel/printk/printk.c:2422
       vprintk+0x200/0x300 kernel/printk/printk_safe.c:68
       _printk+0xdc/0x128 kernel/printk/printk.c:2432
       __report_bug lib/bug.c:195 [inline]
       report_bug+0x3b8/0x5b0 lib/bug.c:219
       bug_handler+0x50/0x1fc arch/arm64/kernel/traps.c:1010
       call_break_hook arch/arm64/kernel/debug-monitors.c:315 [inline]
       brk_handler+0x1d8/0x288 arch/arm64/kernel/debug-monitors.c:325
       do_debug_exception+0x1e4/0x398 arch/arm64/mm/fault.c:1002
       el1_dbg+0x64/0x80 arch/arm64/kernel/entry-common.c:490
       el1h_64_sync_handler+0x40/0xcc arch/arm64/kernel/entry-common.c:536
       el1h_64_sync+0x6c/0x70 arch/arm64/kernel/entry.S:595
       inc_dl_deadline kernel/sched/deadline.c:1837 [inline]
       inc_dl_tasks kernel/sched/deadline.c:1879 [inline]
       __enqueue_dl_entity kernel/sched/deadline.c:1975 [inline]
       enqueue_dl_entity+0x1090/0x164c kernel/sched/deadline.c:2068
       dl_server_start+0xc0/0x208 kernel/sched/deadline.c:1650
       dl_server_start+0xc0/0x208 kernel/sched/deadline.c:1650
       enqueue_task_fair+0x88c/0xbb8 kernel/sched/fair.c:7044
       enqueue_task+0x7c/0x204 kernel/sched/core.c:2020
       activate_task+0x78/0xd0 kernel/sched/core.c:2067
       attach_task kernel/sched/fair.c:9641 [inline]
       attach_tasks kernel/sched/fair.c:9676 [inline]
       sched_balance_rq+0x501c/0x6e14 kernel/sched/fair.c:11753
       sched_balance_newidle+0x558/0xd40 kernel/sched/fair.c:12795
       pick_next_task_fair+0x48/0x870 kernel/sched/fair.c:8943
       __pick_next_task kernel/sched/core.c:5971 [inline]
       pick_next_task kernel/sched/core.c:6493 [inline]
       __schedule+0x718/0x27d0 kernel/sched/core.c:6647
       __schedule_loop kernel/sched/core.c:6770 [inline]
       schedule+0xbc/0x238 kernel/sched/core.c:6785
       schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6842
       rwsem_down_write_slowpath+0xd10/0x14c8 kernel/locking/rwsem.c:1176
       __down_write_common kernel/locking/rwsem.c:1304 [inline]
       __down_write kernel/locking/rwsem.c:1313 [inline]
       down_write+0xb4/0xc0 kernel/locking/rwsem.c:1578
       kernfs_remove_by_name_ns+0x7c/0x188 fs/kernfs/dir.c:1689
       kernfs_remove_by_name include/linux/kernfs.h:625 [inline]
       sysfs_unmerge_group+0xd8/0x138 fs/sysfs/group.c:399
       rpm_sysfs_remove drivers/base/power/sysfs.c:826 [inline]
       dpm_sysfs_remove+0x84/0xd4 drivers/base/power/sysfs.c:835
       device_del+0x21c/0x828 drivers/base/core.c:3836
       serio_destroy_port+0x300/0x414 drivers/input/serio/serio.c:570
       serio_unregister_port+0x11c/0x140 drivers/input/serio/serio.c:706
       userio_char_release+0x94/0xcc drivers/input/serio/userio.c:111
       __fput+0x1bc/0x75c fs/file_table.c:431
       ____fput+0x20/0x30 fs/file_table.c:459
       task_work_run+0x230/0x2e0 kernel/task_work.c:239
       resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
       do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151
       exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
       exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
       el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745
       el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

other info that might help us debug this:

Chain exists of:
  console_owner --> &p->pi_lock --> &rq->__lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&rq->__lock);
                               lock(&p->pi_lock);
                               lock(&rq->__lock);
  lock(console_owner);

 *** DEADLOCK ***

6 locks held by syz.4.286/7692:
 #0: ffff800091b602a8 (serio_mutex){+.+.}-{3:3}, at: serio_unregister_port+0x38/0x140 drivers/input/serio/serio.c:704
 #1: ffff0000c1892948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_remove_by_name_ns+0x7c/0x188 fs/kernfs/dir.c:1689
 #2: ffff80008faafee0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:336
 #3: ffff0001b3655918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2c/0x44 kernel/sched/core.c:598
 #4: ffff80008f98cb60 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x2ec/0x55c kernel/printk/printk.c:2406
 #5: ffff80008f98c770 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire+0x10/0x4c include/linux/rcupdate.h:341

stack backtrace:
CPU: 1 UID: 0 PID: 7692 Comm: syz.4.286 Not tainted 6.12.0-syzkaller-g7b1d1d4cfac0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:484 (C)
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 print_circular_bug+0x154/0x1c0 kernel/locking/lockdep.c:2074
 check_noncircular+0x310/0x404 kernel/locking/lockdep.c:2206
 check_prev_add kernel/locking/lockdep.c:3161 [inline]
 check_prevs_add kernel/locking/lockdep.c:3280 [inline]
 validate_chain kernel/locking/lockdep.c:3904 [inline]
 __lock_acquire+0x33f8/0x77c8 kernel/locking/lockdep.c:5202
 lock_acquire+0x240/0x728 kernel/locking/lockdep.c:5825
 console_lock_spinning_enable+0xb4/0xec kernel/printk/printk.c:1905
 console_emit_next_record kernel/printk/printk.c:3086 [inline]
 console_flush_all+0x5c4/0xb90 kernel/printk/printk.c:3180
 __console_flush_and_unlock kernel/printk/printk.c:3239 [inline]
 console_unlock+0x138/0x3ac kernel/printk/printk.c:3279
 vprintk_emit+0x308/0x55c kernel/printk/printk.c:2407
 vprintk_default+0xa0/0xe4 kernel/printk/printk.c:2422
 vprintk+0x200/0x300 kernel/printk/printk_safe.c:68
 _printk+0xdc/0x128 kernel/printk/printk.c:2432
 __report_bug lib/bug.c:195 [inline]
 report_bug+0x3b8/0x5b0 lib/bug.c:219
 bug_handler+0x50/0x1fc arch/arm64/kernel/traps.c:1010
 call_break_hook arch/arm64/kernel/debug-monitors.c:315 [inline]
 brk_handler+0x1d8/0x288 arch/arm64/kernel/debug-monitors.c:325
 do_debug_exception+0x1e4/0x398 arch/arm64/mm/fault.c:1002
 el1_dbg+0x64/0x80 arch/arm64/kernel/entry-common.c:490
 el1h_64_sync_handler+0x40/0xcc arch/arm64/kernel/entry-common.c:536
 el1h_64_sync+0x6c/0x70 arch/arm64/kernel/entry.S:595
 inc_dl_deadline kernel/sched/deadline.c:1837 [inline] (P)
 inc_dl_tasks kernel/sched/deadline.c:1879 [inline] (P)
 __enqueue_dl_entity kernel/sched/deadline.c:1975 [inline] (P)
 enqueue_dl_entity+0x1090/0x164c kernel/sched/deadline.c:2068 (P)
 dl_server_start+0xc0/0x208 kernel/sched/deadline.c:1650 (L)
 dl_server_start+0xc0/0x208 kernel/sched/deadline.c:1650
 enqueue_task_fair+0x88c/0xbb8 kernel/sched/fair.c:7044
 enqueue_task+0x7c/0x204 kernel/sched/core.c:2020
 activate_task+0x78/0xd0 kernel/sched/core.c:2067
 attach_task kernel/sched/fair.c:9641 [inline]
 attach_tasks kernel/sched/fair.c:9676 [inline]
 sched_balance_rq+0x501c/0x6e14 kernel/sched/fair.c:11753
 sched_balance_newidle+0x558/0xd40 kernel/sched/fair.c:12795
 pick_next_task_fair+0x48/0x870 kernel/sched/fair.c:8943
 __pick_next_task kernel/sched/core.c:5971 [inline]
 pick_next_task kernel/sched/core.c:6493 [inline]
 __schedule+0x718/0x27d0 kernel/sched/core.c:6647
 __schedule_loop kernel/sched/core.c:6770 [inline]
 schedule+0xbc/0x238 kernel/sched/core.c:6785
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6842
 rwsem_down_write_slowpath+0xd10/0x14c8 kernel/locking/rwsem.c:1176
 __down_write_common kernel/locking/rwsem.c:1304 [inline]
 __down_write kernel/locking/rwsem.c:1313 [inline]
 down_write+0xb4/0xc0 kernel/locking/rwsem.c:1578
 kernfs_remove_by_name_ns+0x7c/0x188 fs/kernfs/dir.c:1689
 kernfs_remove_by_name include/linux/kernfs.h:625 [inline]
 sysfs_unmerge_group+0xd8/0x138 fs/sysfs/group.c:399
 rpm_sysfs_remove drivers/base/power/sysfs.c:826 [inline]
 dpm_sysfs_remove+0x84/0xd4 drivers/base/power/sysfs.c:835
 device_del+0x21c/0x828 drivers/base/core.c:3836
 serio_destroy_port+0x300/0x414 drivers/input/serio/serio.c:570
 serio_unregister_port+0x11c/0x140 drivers/input/serio/serio.c:706
 userio_char_release+0x94/0xcc drivers/input/serio/userio.c:111
 __fput+0x1bc/0x75c fs/file_table.c:431
 ____fput+0x20/0x30 fs/file_table.c:459
 task_work_run+0x230/0x2e0 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
 el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
WARNING: CPU: 1 PID: 7692 at kernel/sched/deadline.c:1995 inc_dl_deadline kernel/sched/deadline.c:1837 [inline]
WARNING: CPU: 1 PID: 7692 at kernel/sched/deadline.c:1995 inc_dl_tasks kernel/sched/deadline.c:1879 [inline]
WARNING: CPU: 1 PID: 7692 at kernel/sched/deadline.c:1995 __enqueue_dl_entity kernel/sched/deadline.c:1975 [inline]
WARNING: CPU: 1 PID: 7692 at kernel/sched/deadline.c:1995 enqueue_dl_entity+0x1090/0x164c kernel/sched/deadline.c:2068
Modules linked in:
CPU: 1 UID: 0 PID: 7692 Comm: syz.4.286 Not tainted 6.12.0-syzkaller-g7b1d1d4cfac0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 004000c5 (nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : enqueue_dl_entity+0x1090/0x164c kernel/sched/deadline.c:1837
lr : dl_server_start+0xc0/0x208 kernel/sched/deadline.c:1650
sp : ffff80009e096b60
x29: ffff80009e096ba0 x28: 0000000000000000 x27: ffff0001b36562e8
x26: 0000000000000001 x25: 1fffe000366cac67 x24: 1fffe000366cac78
x23: ffff0001b3655900 x22: 0000000000000001 x21: ffff0001b3656300
x20: ffff0001b36563c0 x19: ffff0001b36562e8 x18: ffff80009e096600
x17: 000000000003ce78 x16: ffff8000803541a4 x15: 0000000000000001
x14: 1fffe0001ae55298 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000000 x10: fffffffffffffff0 x9 : 1fffe000366cac5d
x8 : 0000000000000001 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000020 x4 : 0000000000000000 x3 : ffff8000802d0798
x2 : 0000000000083b4e x1 : 0000000000000001 x0 : ffff0001b36562e8
Call trace:
 inc_dl_deadline kernel/sched/deadline.c:1837 [inline] (P)
 inc_dl_tasks kernel/sched/deadline.c:1879 [inline] (P)
 __enqueue_dl_entity kernel/sched/deadline.c:1975 [inline] (P)
 enqueue_dl_entity+0x1090/0x164c kernel/sched/deadline.c:2068 (P)
 dl_server_start+0xc0/0x208 kernel/sched/deadline.c:1650 (L)
 dl_server_start+0xc0/0x208 kernel/sched/deadline.c:1650
 enqueue_task_fair+0x88c/0xbb8 kernel/sched/fair.c:7044
 enqueue_task+0x7c/0x204 kernel/sched/core.c:2020
 activate_task+0x78/0xd0 kernel/sched/core.c:2067
 attach_task kernel/sched/fair.c:9641 [inline]
 attach_tasks kernel/sched/fair.c:9676 [inline]
 sched_balance_rq+0x501c/0x6e14 kernel/sched/fair.c:11753
 sched_balance_newidle+0x558/0xd40 kernel/sched/fair.c:12795
 pick_next_task_fair+0x48/0x870 kernel/sched/fair.c:8943
 __pick_next_task kernel/sched/core.c:5971 [inline]
 pick_next_task kernel/sched/core.c:6493 [inline]
 __schedule+0x718/0x27d0 kernel/sched/core.c:6647
 __schedule_loop kernel/sched/core.c:6770 [inline]
 schedule+0xbc/0x238 kernel/sched/core.c:6785
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6842
 rwsem_down_write_slowpath+0xd10/0x14c8 kernel/locking/rwsem.c:1176
 __down_write_common kernel/locking/rwsem.c:1304 [inline]
 __down_write kernel/locking/rwsem.c:1313 [inline]
 down_write+0xb4/0xc0 kernel/locking/rwsem.c:1578
 kernfs_remove_by_name_ns+0x7c/0x188 fs/kernfs/dir.c:1689
 kernfs_remove_by_name include/linux/kernfs.h:625 [inline]
 sysfs_unmerge_group+0xd8/0x138 fs/sysfs/group.c:399
 rpm_sysfs_remove drivers/base/power/sysfs.c:826 [inline]
 dpm_sysfs_remove+0x84/0xd4 drivers/base/power/sysfs.c:835
 device_del+0x21c/0x828 drivers/base/core.c:3836
 serio_destroy_port+0x300/0x414 drivers/input/serio/serio.c:570
 serio_unregister_port+0x11c/0x140 drivers/input/serio/serio.c:706
 userio_char_release+0x94/0xcc drivers/input/serio/userio.c:111
 __fput+0x1bc/0x75c fs/file_table.c:431
 ____fput+0x20/0x30 fs/file_table.c:459
 task_work_run+0x230/0x2e0 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
 el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
irq event stamp: 2264
hardirqs last  enabled at (2263): [<ffff80008b6395ac>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last  enabled at (2263): [<ffff80008b6395ac>] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:202
hardirqs last disabled at (2264): [<ffff80008b6227a8>] __schedule+0x2bc/0x27d0 kernel/sched/core.c:6572
softirqs last  enabled at (2234): [<ffff80008002f3d8>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (2232): [<ffff80008002f3a4>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 1 PID: 7692 at kernel/sched/deadline.c:1971 enqueue_dl_entity+0x1098/0x164c kernel/sched/deadline.c:1837
Modules linked in:
CPU: 1 UID: 0 PID: 7692 Comm: syz.4.286 Tainted: G        W          6.12.0-syzkaller-g7b1d1d4cfac0 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 004000c5 (nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __enqueue_dl_entity kernel/sched/deadline.c:1837 [inline]
pc : enqueue_dl_entity+0x1098/0x164c kernel/sched/deadline.c:2068
lr : enqueue_dl_entity+0x6c4/0x164c kernel/sched/deadline.c:2040
sp : ffff80009e096b60
x29: ffff80009e096ba0 x28: 1fffe000366cac66 x27: ffff0001b36562e8
x26: ffff0001b3655900 x25: 1fffe000366cac67 x24: ffff0001b3656438
x23: ffff0001b3656300 x22: ffff0001b3656328 x21: ffff0001b3655900
x20: ffff0001b3656280 x19: ffff0001b365633c x18: ffff80009e096600
x17: 000000000003ce78 x16: ffff80008b547910 x15: 0000000000000001
x14: 1fffe0001ae55298 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000000 x10: dfff800000000000 x9 : 1fffe000366cac5d
x8 : 0000000000000001 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000020 x4 : 0000000000000000 x3 : ffff8000802d0798
x2 : 0000000000083b4e x1 : 0000000000000001 x0 : ffff0001b3656308
Call trace:
 enqueue_dl_entity+0x1098/0x164c kernel/sched/deadline.c:1837 (P)
 enqueue_dl_entity+0x6c4/0x164c kernel/sched/deadline.c:2040 (L)
 dl_server_start+0xc0/0x208 kernel/sched/deadline.c:1650
 enqueue_task_fair+0x88c/0xbb8 kernel/sched/fair.c:7044
 enqueue_task+0x7c/0x204 kernel/sched/core.c:2020
 activate_task+0x78/0xd0 kernel/sched/core.c:2067
 attach_task kernel/sched/fair.c:9641 [inline]
 attach_tasks kernel/sched/fair.c:9676 [inline]
 sched_balance_rq+0x501c/0x6e14 kernel/sched/fair.c:11753
 sched_balance_newidle+0x558/0xd40 kernel/sched/fair.c:12795
 pick_next_task_fair+0x48/0x870 kernel/sched/fair.c:8943
 __pick_next_task kernel/sched/core.c:5971 [inline]
 pick_next_task kernel/sched/core.c:6493 [inline]
 __schedule+0x718/0x27d0 kernel/sched/core.c:6647
 __schedule_loop kernel/sched/core.c:6770 [inline]
 schedule+0xbc/0x238 kernel/sched/core.c:6785
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6842
 rwsem_down_write_slowpath+0xd10/0x14c8 kernel/locking/rwsem.c:1176
 __down_write_common kernel/locking/rwsem.c:1304 [inline]
 __down_write kernel/locking/rwsem.c:1313 [inline]
 down_write+0xb4/0xc0 kernel/locking/rwsem.c:1578
 kernfs_remove_by_name_ns+0x7c/0x188 fs/kernfs/dir.c:1689
 kernfs_remove_by_name include/linux/kernfs.h:625 [inline]
 sysfs_unmerge_group+0xd8/0x138 fs/sysfs/group.c:399
 rpm_sysfs_remove drivers/base/power/sysfs.c:826 [inline]
 dpm_sysfs_remove+0x84/0xd4 drivers/base/power/sysfs.c:835
 device_del+0x21c/0x828 drivers/base/core.c:3836
 serio_destroy_port+0x300/0x414 drivers/input/serio/serio.c:570
 serio_unregister_port+0x11c/0x140 drivers/input/serio/serio.c:706
 userio_char_release+0x94/0xcc drivers/input/serio/userio.c:111
 __fput+0x1bc/0x75c fs/file_table.c:431
 ____fput+0x20/0x30 fs/file_table.c:459
 task_work_run+0x230/0x2e0 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
 el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
irq event stamp: 2264
hardirqs last  enabled at (2263): [<ffff80008b6395ac>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last  enabled at (2263): [<ffff80008b6395ac>] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:202
hardirqs last disabled at (2264): [<ffff80008b6227a8>] __schedule+0x2bc/0x27d0 kernel/sched/core.c:6572
softirqs last  enabled at (2234): [<ffff80008002f3d8>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (2232): [<ffff80008002f3a4>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---