------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.16.0-rc1-syzkaller-g2c4a1f3fe03e #0 Not tainted
------------------------------------------------------
udevd/6099 is trying to acquire lock:
ffffffff8e4d1dc0 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x9f/0xd0 kernel/printk/printk.c:1924

but task is already holding lock:
ffff88806a63bc98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:614 [inline]
ffff88806a63bc98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:599

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+0x31/0x40 kernel/locking/spinlock.c:378
       raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:606
       raw_spin_rq_lock kernel/sched/sched.h:1532 [inline]
       task_rq_lock+0xcf/0x490 kernel/sched/core.c:708
       cgroup_move_task+0x81/0x2a0 kernel/sched/psi.c:1161
       css_set_move_task+0x288/0x5f0 kernel/cgroup/cgroup.c:918
       cgroup_post_fork+0x201/0x9e0 kernel/cgroup/cgroup.c:6754
       copy_process+0x5cfc/0x76a0 kernel/fork.c:2413
       kernel_clone+0xfc/0x960 kernel/fork.c:2599
       user_mode_thread+0xc7/0x110 kernel/fork.c:2677
       rest_init+0x23/0x2b0 init/main.c:709
       start_kernel+0x3ee/0x4d0 init/main.c:1101
       x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:307
       x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:288
       common_startup_64+0x13e/0x148

-> #3 (&p->pi_lock){-.-.}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
       class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:557 [inline]
       try_to_wake_up+0xb2/0x1680 kernel/sched/core.c:4226
       __wake_up_common+0x132/0x1f0 kernel/sched/wait.c:89
       __wake_up_common_lock kernel/sched/wait.c:106 [inline]
       __wake_up+0x31/0x60 kernel/sched/wait.c:127
       tty_port_default_wakeup+0x2a/0x40 drivers/tty/tty_port.c:69
       serial8250_tx_chars+0x68e/0x860 drivers/tty/serial/8250/8250_port.c:1838
       serial8250_handle_irq+0x761/0xcb0 drivers/tty/serial/8250/8250_port.c:1946
       serial8250_default_handle_irq+0x9a/0x210 drivers/tty/serial/8250/8250_port.c:1966
       serial8250_interrupt+0x103/0x210 drivers/tty/serial/8250/8250_core.c:86
       __handle_irq_event_percpu+0x22c/0x7d0 kernel/irq/handle.c:158
       handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
       handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210
       handle_edge_irq+0x28e/0xab0 kernel/irq/chip.c:789
       generic_handle_irq_desc include/linux/irqdesc.h:173 [inline]
       handle_irq arch/x86/kernel/irq.c:254 [inline]
       call_irq_handler arch/x86/kernel/irq.c:266 [inline]
       __common_interrupt+0xe2/0x250 arch/x86/kernel/irq.c:292
       common_interrupt+0xba/0xe0 arch/x86/kernel/irq.c:285
       asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
       native_pause arch/x86/include/asm/vdso/processor.h:13 [inline]
       cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline]
       csd_lock_wait kernel/smp.c:340 [inline]
       csd_lock kernel/smp.c:355 [inline]
       smp_call_function_single+0x42f/0x6b0 kernel/smp.c:666
       __sync_rcu_exp_select_node_cpus+0x5f5/0xe20 kernel/rcu/tree_exp.h:420
       sync_rcu_exp_select_node_cpus kernel/rcu/tree_exp.h:455 [inline]
       sync_rcu_exp_select_cpus+0x341/0xa30 kernel/rcu/tree_exp.h:522
       rcu_exp_sel_wait_wake kernel/rcu/tree_exp.h:718 [inline]
       wait_rcu_exp_gp+0x2c/0x40 kernel/rcu/tree_exp.h:492
       kthread_worker_fn+0x310/0xc50 kernel/kthread.c:1010
       kthread+0x3c5/0x780 kernel/kthread.c:464
       ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

-> #2 (&tty->write_wait){-.-.}-{3:3}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
       __wake_up_common_lock kernel/sched/wait.c:105 [inline]
       __wake_up+0x1c/0x60 kernel/sched/wait.c:127
       tty_port_default_wakeup+0x2a/0x40 drivers/tty/tty_port.c:69
       serial8250_tx_chars+0x68e/0x860 drivers/tty/serial/8250/8250_port.c:1838
       serial8250_handle_irq+0x761/0xcb0 drivers/tty/serial/8250/8250_port.c:1946
       serial8250_default_handle_irq+0x9a/0x210 drivers/tty/serial/8250/8250_port.c:1966
       serial8250_interrupt+0x103/0x210 drivers/tty/serial/8250/8250_core.c:86
       __handle_irq_event_percpu+0x22c/0x7d0 kernel/irq/handle.c:158
       handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
       handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210
       handle_edge_irq+0x28e/0xab0 kernel/irq/chip.c:789
       generic_handle_irq_desc include/linux/irqdesc.h:173 [inline]
       handle_irq arch/x86/kernel/irq.c:254 [inline]
       call_irq_handler arch/x86/kernel/irq.c:266 [inline]
       __common_interrupt+0xe2/0x250 arch/x86/kernel/irq.c:292
       common_interrupt+0xba/0xe0 arch/x86/kernel/irq.c:285
       asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
       __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
       _raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194
       spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
       uart_port_unlock_irqrestore include/linux/serial_core.h:788 [inline]
       uart_port_unlock_deref drivers/tty/serial/serial_core.c:91 [inline]
       uart_port_unlock_deref drivers/tty/serial/serial_core.c:88 [inline]
       uart_write+0x2a4/0xb30 drivers/tty/serial/serial_core.c:637
       process_output_block drivers/tty/n_tty.c:561 [inline]
       n_tty_write+0x40f/0x1160 drivers/tty/n_tty.c:2377
       iterate_tty_write drivers/tty/tty_io.c:1006 [inline]
       file_tty_write.constprop.0+0x504/0x9b0 drivers/tty/tty_io.c:1081
       tty_write drivers/tty/tty_io.c:1102 [inline]
       redirected_tty_write drivers/tty/tty_io.c:1125 [inline]
       redirected_tty_write+0xd4/0x150 drivers/tty/tty_io.c:1105
       new_sync_write fs/read_write.c:593 [inline]
       vfs_write+0x6c7/0x1150 fs/read_write.c:686
       ksys_write+0x12a/0x250 fs/read_write.c:738
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&port_lock_key){-.-.}-{3:3}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
       uart_port_lock_irqsave include/linux/serial_core.h:717 [inline]
       serial8250_console_write+0x181/0x1890 drivers/tty/serial/8250/8250_port.c:3415
       console_emit_next_record kernel/printk/printk.c:3138 [inline]
       console_flush_all+0x801/0xc60 kernel/printk/printk.c:3226
       __console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
       console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
       vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
       _printk+0xc7/0x100 kernel/printk/printk.c:2475
       register_console+0xc2d/0x11b0 kernel/printk/printk.c:4125
       univ8250_console_init+0x5f/0x90 drivers/tty/serial/8250/8250_core.c:513
       console_init+0x14f/0x680 kernel/printk/printk.c:4323
       start_kernel+0x29f/0x4d0 init/main.c:1035
       x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:307
       x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:288
       common_startup_64+0x13e/0x148

-> #0 (console_owner){....}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3168 [inline]
       check_prevs_add kernel/locking/lockdep.c:3287 [inline]
       validate_chain kernel/locking/lockdep.c:3911 [inline]
       __lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240
       lock_acquire kernel/locking/lockdep.c:5871 [inline]
       lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828
       console_lock_spinning_enable+0xb0/0xd0 kernel/printk/printk.c:1924
       console_emit_next_record kernel/printk/printk.c:3132 [inline]
       console_flush_all+0x7aa/0xc60 kernel/printk/printk.c:3226
       __console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
       console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
       vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
       _printk+0xc7/0x100 kernel/printk/printk.c:2475
       __report_bug lib/bug.c:191 [inline]
       report_bug+0x435/0x580 lib/bug.c:215
       handle_bug+0x184/0x210 arch/x86/kernel/traps.c:338
       exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:392
       asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621
       lockdep_assert_rq_held kernel/sched/sched.h:1523 [inline]
       lockdep_assert_rq_held kernel/sched/sched.h:1521 [inline]
       rq_clock_pelt kernel/sched/pelt.h:67 [inline]
       cfs_rq_clock_pelt kernel/sched/pelt.h:175 [inline]
       update_load_avg+0x106/0x1fc0 kernel/sched/fair.c:4757
       set_next_entity+0x394/0x700 kernel/sched/fair.c:5551
       set_next_task_fair+0x59/0x350 kernel/sched/fair.c:13317
       put_prev_set_next_task kernel/sched/sched.h:2498 [inline]
       pick_next_task kernel/sched/core.c:6341 [inline]
       __schedule+0x16b7/0x5de0 kernel/sched/core.c:6738
       preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7108
       irqentry_exit+0x36/0x90 kernel/entry/common.c:307
       asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
       lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5836
       rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
       rcu_read_lock include/linux/rcupdate.h:841 [inline]
       class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
       unwind_next_frame+0xd1/0x20a0 arch/x86/kernel/unwind_orc.c:479
       arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
       stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
       kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
       kasan_save_track+0x14/0x30 mm/kasan/common.c:68
       kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
       poison_slab_object mm/kasan/common.c:247 [inline]
       __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
       kasan_slab_free include/linux/kasan.h:233 [inline]
       slab_free_hook mm/slub.c:2381 [inline]
       slab_free mm/slub.c:4643 [inline]
       kfree+0x2b4/0x4d0 mm/slub.c:4842
       tomoyo_realpath_from_path+0x19f/0x6e0 security/tomoyo/realpath.c:286
       tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
       tomoyo_check_open_permission+0x2ab/0x3c0 security/tomoyo/file.c:771
       tomoyo_file_open+0x6b/0x90 security/tomoyo/tomoyo.c:334
       security_file_open+0x84/0x1e0 security/security.c:3114
       do_dentry_open+0x596/0x1c10 fs/open.c:941
       vfs_open+0x82/0x3f0 fs/open.c:1094
       do_open fs/namei.c:3887 [inline]
       path_openat+0x1de4/0x2cb0 fs/namei.c:4046
       do_filp_open+0x20b/0x470 fs/namei.c:4073
       do_sys_openat2+0x11b/0x1d0 fs/open.c:1437
       do_sys_open fs/open.c:1452 [inline]
       __do_sys_openat fs/open.c:1468 [inline]
       __se_sys_openat fs/open.c:1463 [inline]
       __x64_sys_openat+0x174/0x210 fs/open.c:1463
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

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 ***

5 locks held by udevd/6099:
 #0: ffffffff8f05e1f0 (tomoyo_ss){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:161 [inline]
 #0: ffffffff8f05e1f0 (tomoyo_ss){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:253 [inline]
 #0: ffffffff8f05e1f0 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_read_lock security/tomoyo/common.h:1108 [inline]
 #0: ffffffff8f05e1f0 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_check_open_permission+0x166/0x3c0 security/tomoyo/file.c:767
 #1: ffffffff8e5c4840 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #1: ffffffff8e5c4840 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #1: ffffffff8e5c4840 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
 #1: ffffffff8e5c4840 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0xbd/0x20a0 arch/x86/kernel/unwind_orc.c:479
 #2: ffff88806a63bc98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:614 [inline]
 #2: ffff88806a63bc98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:599
 #3: ffffffff8e5b2200 (console_lock){+.+.}-{0:0}, at: _printk+0xc7/0x100 kernel/printk/printk.c:2475
 #4: ffffffff8e5b2270 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:336 [inline]
 #4: ffffffff8e5b2270 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:346 [inline]
 #4: ffffffff8e5b2270 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:288 [inline]
 #4: ffffffff8e5b2270 (console_srcu){....}-{0:0}, at: console_flush_all+0x158/0xc60 kernel/printk/printk.c:3203

stack backtrace:
CPU: 3 UID: 0 PID: 6099 Comm: udevd Not tainted 6.16.0-rc1-syzkaller-g2c4a1f3fe03e #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2046
 check_noncircular+0x14c/0x170 kernel/locking/lockdep.c:2178
 check_prev_add kernel/locking/lockdep.c:3168 [inline]
 check_prevs_add kernel/locking/lockdep.c:3287 [inline]
 validate_chain kernel/locking/lockdep.c:3911 [inline]
 __lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240
 lock_acquire kernel/locking/lockdep.c:5871 [inline]
 lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828
 console_lock_spinning_enable+0xb0/0xd0 kernel/printk/printk.c:1924
 console_emit_next_record kernel/printk/printk.c:3132 [inline]
 console_flush_all+0x7aa/0xc60 kernel/printk/printk.c:3226
 __console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
 console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
 vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
 _printk+0xc7/0x100 kernel/printk/printk.c:2475
 __report_bug lib/bug.c:191 [inline]
 report_bug+0x435/0x580 lib/bug.c:215
 handle_bug+0x184/0x210 arch/x86/kernel/traps.c:338
 exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:392
 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1523 [inline]
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1521 [inline]
RIP: 0010:rq_clock_pelt kernel/sched/pelt.h:67 [inline]
RIP: 0010:cfs_rq_clock_pelt kernel/sched/pelt.h:175 [inline]
RIP: 0010:update_load_avg+0x106/0x1fc0 kernel/sched/fair.c:4757
Code: f3 19 00 00 41 8b 84 24 70 0e 00 00 4c 89 e7 85 c0 0f 85 11 15 00 00 48 83 c7 18 be ff ff ff ff e8 5f a3 f2 09 85 c0 75 04 90 <0f> 0b 90 49 8d bc 24 38 0b 00 00 48 b8 00 00 00 00 00 fc ff df 48
RSP: 0018:ffffc90004a0ef20 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880394f7800 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8ddf3a59 RDI: ffffffff8c157060
RBP: ffff888038b124c0 R08: 000000000000a800 R09: 0000000000200b20
R10: 1ffff110049fe927 R11: 0000000000000001 R12: ffff88806a53bc80
R13: 0000000000000001 R14: ffff88806a73bc80 R15: 0000000000000001
 set_next_entity+0x394/0x700 kernel/sched/fair.c:5551
 set_next_task_fair+0x59/0x350 kernel/sched/fair.c:13317
 put_prev_set_next_task kernel/sched/sched.h:2498 [inline]
 pick_next_task kernel/sched/core.c:6341 [inline]
 __schedule+0x16b7/0x5de0 kernel/sched/core.c:6738
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7108
 irqentry_exit+0x36/0x90 kernel/entry/common.c:307
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5875
Code: 42 34 12 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 42 8e 0f 0f 0f 82 74 02 00 00 8b 35 2a c0 0f 0f 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 d9 41 34 12 0f 85 c7 02 00 00 48 83 c4
RSP: 0018:ffffc90004a0f280 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff8e5c4840 RCX: 00000000eb576387
RDX: 0000000000000000 RSI: ffffffff8ddf3a59 RDI: ffffffff8c157060
RBP: 0000000000000002 R08: 7d543858f6d26888 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 rcu_read_lock include/linux/rcupdate.h:841 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
 unwind_next_frame+0xd1/0x20a0 arch/x86/kernel/unwind_orc.c:479
 arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2381 [inline]
 slab_free mm/slub.c:4643 [inline]
 kfree+0x2b4/0x4d0 mm/slub.c:4842
 tomoyo_realpath_from_path+0x19f/0x6e0 security/tomoyo/realpath.c:286
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_check_open_permission+0x2ab/0x3c0 security/tomoyo/file.c:771
 tomoyo_file_open+0x6b/0x90 security/tomoyo/tomoyo.c:334
 security_file_open+0x84/0x1e0 security/security.c:3114
 do_dentry_open+0x596/0x1c10 fs/open.c:941
 vfs_open+0x82/0x3f0 fs/open.c:1094
 do_open fs/namei.c:3887 [inline]
 path_openat+0x1de4/0x2cb0 fs/namei.c:4046
 do_filp_open+0x20b/0x470 fs/namei.c:4073
 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __x64_sys_openat+0x174/0x210 fs/open.c:1463
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f89974a7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffd95f982a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f8997c6f880 RCX: 00007f89974a7407
RDX: 0000000000080000 RSI: 00005585cc3b1fa0 RDI: ffffffffffffff9c
RBP: 00005585cc3b1fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000009
 </TASK>
WARNING: CPU: 3 PID: 6099 at kernel/sched/sched.h:1523 lockdep_assert_rq_held kernel/sched/sched.h:1523 [inline]
WARNING: CPU: 3 PID: 6099 at kernel/sched/sched.h:1523 lockdep_assert_rq_held kernel/sched/sched.h:1521 [inline]
WARNING: CPU: 3 PID: 6099 at kernel/sched/sched.h:1523 rq_clock_pelt kernel/sched/pelt.h:67 [inline]
WARNING: CPU: 3 PID: 6099 at kernel/sched/sched.h:1523 cfs_rq_clock_pelt kernel/sched/pelt.h:175 [inline]
WARNING: CPU: 3 PID: 6099 at kernel/sched/sched.h:1523 update_load_avg+0x106/0x1fc0 kernel/sched/fair.c:4757
Modules linked in:
CPU: 3 UID: 0 PID: 6099 Comm: udevd Not tainted 6.16.0-rc1-syzkaller-g2c4a1f3fe03e #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1523 [inline]
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1521 [inline]
RIP: 0010:rq_clock_pelt kernel/sched/pelt.h:67 [inline]
RIP: 0010:cfs_rq_clock_pelt kernel/sched/pelt.h:175 [inline]
RIP: 0010:update_load_avg+0x106/0x1fc0 kernel/sched/fair.c:4757
Code: f3 19 00 00 41 8b 84 24 70 0e 00 00 4c 89 e7 85 c0 0f 85 11 15 00 00 48 83 c7 18 be ff ff ff ff e8 5f a3 f2 09 85 c0 75 04 90 <0f> 0b 90 49 8d bc 24 38 0b 00 00 48 b8 00 00 00 00 00 fc ff df 48
RSP: 0018:ffffc90004a0ef20 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880394f7800 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8ddf3a59 RDI: ffffffff8c157060
RBP: ffff888038b124c0 R08: 000000000000a800 R09: 0000000000200b20
R10: 1ffff110049fe927 R11: 0000000000000001 R12: ffff88806a53bc80
R13: 0000000000000001 R14: ffff88806a73bc80 R15: 0000000000000001
FS:  00007f8997c6f880(0000) GS:ffff8880d6a54000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020954000 CR3: 000000002a354000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 set_next_entity+0x394/0x700 kernel/sched/fair.c:5551
 set_next_task_fair+0x59/0x350 kernel/sched/fair.c:13317
 put_prev_set_next_task kernel/sched/sched.h:2498 [inline]
 pick_next_task kernel/sched/core.c:6341 [inline]
 __schedule+0x16b7/0x5de0 kernel/sched/core.c:6738
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7108
 irqentry_exit+0x36/0x90 kernel/entry/common.c:307
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5875
Code: 42 34 12 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 42 8e 0f 0f 0f 82 74 02 00 00 8b 35 2a c0 0f 0f 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 d9 41 34 12 0f 85 c7 02 00 00 48 83 c4
RSP: 0018:ffffc90004a0f280 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff8e5c4840 RCX: 00000000eb576387
RDX: 0000000000000000 RSI: ffffffff8ddf3a59 RDI: ffffffff8c157060
RBP: 0000000000000002 R08: 7d543858f6d26888 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 rcu_read_lock include/linux/rcupdate.h:841 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
 unwind_next_frame+0xd1/0x20a0 arch/x86/kernel/unwind_orc.c:479
 arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2381 [inline]
 slab_free mm/slub.c:4643 [inline]
 kfree+0x2b4/0x4d0 mm/slub.c:4842
 tomoyo_realpath_from_path+0x19f/0x6e0 security/tomoyo/realpath.c:286
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_check_open_permission+0x2ab/0x3c0 security/tomoyo/file.c:771
 tomoyo_file_open+0x6b/0x90 security/tomoyo/tomoyo.c:334
 security_file_open+0x84/0x1e0 security/security.c:3114
 do_dentry_open+0x596/0x1c10 fs/open.c:941
 vfs_open+0x82/0x3f0 fs/open.c:1094
 do_open fs/namei.c:3887 [inline]
 path_openat+0x1de4/0x2cb0 fs/namei.c:4046
 do_filp_open+0x20b/0x470 fs/namei.c:4073
 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __x64_sys_openat+0x174/0x210 fs/open.c:1463
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f89974a7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffd95f982a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f8997c6f880 RCX: 00007f89974a7407
RDX: 0000000000080000 RSI: 00005585cc3b1fa0 RDI: ffffffffffffff9c
RBP: 00005585cc3b1fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000009
 </TASK>
----------------
Code disassembly (best guess):
   0:	42 34 12             	rex.X xor $0x12,%al
   3:	83 f8 07             	cmp    $0x7,%eax
   6:	0f 87 bc 02 00 00    	ja     0x2c8
   c:	89 c0                	mov    %eax,%eax
   e:	48 0f a3 05 42 8e 0f 	bt     %rax,0xf0f8e42(%rip)        # 0xf0f8e58
  15:	0f
  16:	0f 82 74 02 00 00    	jb     0x290
  1c:	8b 35 2a c0 0f 0f    	mov    0xf0fc02a(%rip),%esi        # 0xf0fc04c
  22:	85 f6                	test   %esi,%esi
  24:	0f 85 8d 00 00 00    	jne    0xb7
* 2a:	48 8b 44 24 30       	mov    0x30(%rsp),%rax <-- trapping instruction
  2f:	65 48 2b 05 d9 41 34 	sub    %gs:0x123441d9(%rip),%rax        # 0x12344210
  36:	12
  37:	0f 85 c7 02 00 00    	jne    0x304
  3d:	48                   	rex.W
  3e:	83                   	.byte 0x83
  3f:	c4                   	.byte 0xc4