------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.11.0-rc5-next-20240827-syzkaller #0 Not tainted
------------------------------------------------------
swapper/0/0 is trying to acquire lock:
ffffffff8e815278 ((console_sem).lock){-...}-{2:2}, at: down_trylock+0x20/0xa0 kernel/locking/semaphore.c:139

but task is already holding lock:
ffff8880b903ead8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:595

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&rq->__lock){-.-.}-{2:2}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
       _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
       raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:587
       raw_spin_rq_lock kernel/sched/sched.h:1488 [inline]
       task_rq_lock+0xc6/0x360 kernel/sched/core.c:689
       cgroup_move_task+0x92/0x2d0 kernel/sched/psi.c:1161
       css_set_move_task+0x72e/0x950 kernel/cgroup/cgroup.c:898
       cgroup_post_fork+0x256/0x880 kernel/cgroup/cgroup.c:6690
       copy_process+0x39e9/0x3d50 kernel/fork.c:2598
       kernel_clone+0x226/0x8f0 kernel/fork.c:2784
       user_mode_thread+0x132/0x1a0 kernel/fork.c:2862
       rest_init+0x23/0x300 init/main.c:712
       start_kernel+0x47f/0x500 init/main.c:1105
       x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
       x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488
       common_startup_64+0x13e/0x147

-> #1 (&p->pi_lock){-.-.}-{2:2}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
       class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline]
       try_to_wake_up+0xb0/0x1480 kernel/sched/core.c:4150
       up+0x72/0x90 kernel/locking/semaphore.c:191
       __up_console_sem kernel/printk/printk.c:342 [inline]
       __console_unlock kernel/printk/printk.c:2828 [inline]
       console_unlock+0x22f/0x4d0 kernel/printk/printk.c:3155
       vprintk_emit+0x87d/0xa10 kernel/printk/printk.c:2399
       dev_vprintk_emit+0x2ae/0x330 drivers/base/core.c:4907
       dev_printk_emit+0xdd/0x120 drivers/base/core.c:4918
       _dev_info+0x122/0x170 drivers/base/core.c:4976
       announce_device drivers/usb/core/hub.c:2369 [inline]
       usb_new_device+0x5e6/0x19a0 drivers/usb/core/hub.c:2632
       hub_port_connect drivers/usb/core/hub.c:5521 [inline]
       hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
       port_event drivers/usb/core/hub.c:5821 [inline]
       hub_event+0x2d6d/0x5150 drivers/usb/core/hub.c:5903
       process_one_work kernel/workqueue.c:3232 [inline]
       process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3313
       worker_thread+0x86d/0xd10 kernel/workqueue.c:3390
       kthread+0x2f0/0x390 kernel/kthread.c:389
       ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

-> #0 ((console_sem).lock){-...}-{2:2}:
       check_prev_add kernel/locking/lockdep.c:3161 [inline]
       check_prevs_add kernel/locking/lockdep.c:3280 [inline]
       validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
       __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
       down_trylock+0x20/0xa0 kernel/locking/semaphore.c:139
       __down_trylock_console_sem+0x109/0x250 kernel/printk/printk.c:325
       console_trylock kernel/printk/printk.c:2811 [inline]
       console_trylock_spinning kernel/printk/printk.c:1985 [inline]
       vprintk_emit+0x4b2/0xa10 kernel/printk/printk.c:2398
       _printk+0xd5/0x120 kernel/printk/printk.c:2424
       __report_bug lib/bug.c:195 [inline]
       report_bug+0x346/0x500 lib/bug.c:219
       handle_bug+0x60/0x90 arch/x86/kernel/traps.c:285
       exc_invalid_op+0x1a/0x50 arch/x86/kernel/traps.c:309
       asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621
       place_entity+0x463/0x520 kernel/sched/fair.c:5337
       enqueue_entity+0x271/0x1920 kernel/sched/fair.c:5409
       enqueue_task_fair+0x206/0xe30 kernel/sched/fair.c:6985
       enqueue_task+0x1a5/0x300 kernel/sched/core.c:2014
       activate_task kernel/sched/core.c:2056 [inline]
       ttwu_do_activate+0x1d1/0x7e0 kernel/sched/core.c:3665
       ttwu_queue kernel/sched/core.c:3940 [inline]
       try_to_wake_up+0x8bc/0x1480 kernel/sched/core.c:4266
       hrtimer_wakeup+0x62/0x80 kernel/time/hrtimer.c:1927
       __run_hrtimer kernel/time/hrtimer.c:1691 [inline]
       __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1755
       hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1817
       local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1026 [inline]
       __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1043
       instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
       sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1037
       asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
       raw_spin_rq_unlock_irq+0x19/0x90 kernel/sched/sched.h:1501
       __schedule+0x1a91/0x4b30 kernel/sched/core.c:6681
       schedule_idle+0x53/0x90 kernel/sched/core.c:6795
       do_idle+0x56a/0x5d0 kernel/sched/idle.c:354
       cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424
       rest_init+0x2dc/0x300 init/main.c:747
       start_kernel+0x47f/0x500 init/main.c:1105
       x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
       x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488
       common_startup_64+0x13e/0x147

other info that might help us debug this:

Chain exists of:
  (console_sem).lock --> &p->pi_lock --> &rq->__lock

 Possible unsafe locking scenario:

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

 *** DEADLOCK ***

2 locks held by swapper/0/0:
 #0: ffff88802e46e418 (&p->pi_lock){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline]
 #0: ffff88802e46e418 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xb0/0x1480 kernel/sched/core.c:4150
 #1: ffff8880b903ead8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:595

stack backtrace:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.11.0-rc5-next-20240827-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074
 check_noncircular+0x36a/0x4a0 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+0x18ef/0x5920 kernel/locking/lockdep.c:3904
 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 down_trylock+0x20/0xa0 kernel/locking/semaphore.c:139
 __down_trylock_console_sem+0x109/0x250 kernel/printk/printk.c:325
 console_trylock kernel/printk/printk.c:2811 [inline]
 console_trylock_spinning kernel/printk/printk.c:1985 [inline]
 vprintk_emit+0x4b2/0xa10 kernel/printk/printk.c:2398
 _printk+0xd5/0x120 kernel/printk/printk.c:2424
 __report_bug lib/bug.c:195 [inline]
 report_bug+0x346/0x500 lib/bug.c:219
 handle_bug+0x60/0x90 arch/x86/kernel/traps.c:285
 exc_invalid_op+0x1a/0x50 arch/x86/kernel/traps.c:309
 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621
RIP: 0010:place_entity+0x463/0x520 kernel/sched/fair.c:5337
Code: 27 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 48 8b 3c 24 4c 89 fe e8 77 14 00 00 48 89 04 24 e9 e0 fd ff ff 90 <0f> 0b 90 41 bd 01 00 00 00 e9 22 ff ff ff 89 d9 80 e1 07 38 c1 0f
RSP: 0018:ffffc90000007a10 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000100000
RDX: 0000000000000400 RSI: ffff88802e46da80 RDI: ffff88802e46db00
RBP: dffffc0000000000 R08: 000000000000022d R09: 1ffffffff20386c5
R10: dffffc0000000000 R11: fffffbfff20386c6 R12: 0000000017ec16df
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88802e46da80
 enqueue_entity+0x271/0x1920 kernel/sched/fair.c:5409
 enqueue_task_fair+0x206/0xe30 kernel/sched/fair.c:6985
 enqueue_task+0x1a5/0x300 kernel/sched/core.c:2014
 activate_task kernel/sched/core.c:2056 [inline]
 ttwu_do_activate+0x1d1/0x7e0 kernel/sched/core.c:3665
 ttwu_queue kernel/sched/core.c:3940 [inline]
 try_to_wake_up+0x8bc/0x1480 kernel/sched/core.c:4266
 hrtimer_wakeup+0x62/0x80 kernel/time/hrtimer.c:1927
 __run_hrtimer kernel/time/hrtimer.c:1691 [inline]
 __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1755
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1817
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1026 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1043
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1037
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:raw_spin_rq_unlock_irq+0x19/0x90 kernel/sched/sched.h:1501
Code: 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 41 56 53 48 89 fb eb 18 48 89 df e8 3e a1 64 0a e8 89 9a 36 00 fb 5b <41> 5e 41 5f c3 cc cc cc cc f3 0f 1e fa 49 bf 00 00 00 00 00 fc ff
RSP: 0018:ffffffff8e607b48 EFLAGS: 00000286
RAX: 1345712f5871b300 RBX: ffff8880b903eac0 RCX: ffffffff94f9b903
RDX: dffffc0000000000 RSI: ffffffff8c0acac0 RDI: ffffffff8c6088c0
RBP: ffffffff8e607d48 R08: ffffffff901c362f R09: 1ffffffff20386c5
R10: dffffc0000000000 R11: fffffbfff20386c6 R12: ffff8880b903f648
R13: ffffffff8e694640 R14: ffff8880b903f8d8 R15: dffffc0000000000
 __schedule+0x1a91/0x4b30 kernel/sched/core.c:6681
 schedule_idle+0x53/0x90 kernel/sched/core.c:6795
 do_idle+0x56a/0x5d0 kernel/sched/idle.c:354
 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424
 rest_init+0x2dc/0x300 init/main.c:747
 start_kernel+0x47f/0x500 init/main.c:1105
 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
 x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488
 common_startup_64+0x13e/0x147
 </TASK>
WARNING: CPU: 0 PID: 0 at kernel/sched/fair.c:5337 place_entity+0x463/0x520 kernel/sched/fair.c:5337
Modules linked in:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.11.0-rc5-next-20240827-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:place_entity+0x463/0x520 kernel/sched/fair.c:5337
Code: 27 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 48 8b 3c 24 4c 89 fe e8 77 14 00 00 48 89 04 24 e9 e0 fd ff ff 90 <0f> 0b 90 41 bd 01 00 00 00 e9 22 ff ff ff 89 d9 80 e1 07 38 c1 0f
RSP: 0018:ffffc90000007a10 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000100000
RDX: 0000000000000400 RSI: ffff88802e46da80 RDI: ffff88802e46db00
RBP: dffffc0000000000 R08: 000000000000022d R09: 1ffffffff20386c5
R10: dffffc0000000000 R11: fffffbfff20386c6 R12: 0000000017ec16df
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88802e46da80
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32c1fffc CR3: 0000000028ad2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 enqueue_entity+0x271/0x1920 kernel/sched/fair.c:5409
 enqueue_task_fair+0x206/0xe30 kernel/sched/fair.c:6985
 enqueue_task+0x1a5/0x300 kernel/sched/core.c:2014
 activate_task kernel/sched/core.c:2056 [inline]
 ttwu_do_activate+0x1d1/0x7e0 kernel/sched/core.c:3665
 ttwu_queue kernel/sched/core.c:3940 [inline]
 try_to_wake_up+0x8bc/0x1480 kernel/sched/core.c:4266
 hrtimer_wakeup+0x62/0x80 kernel/time/hrtimer.c:1927
 __run_hrtimer kernel/time/hrtimer.c:1691 [inline]
 __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1755
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1817
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1026 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1043
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1037
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:raw_spin_rq_unlock_irq+0x19/0x90 kernel/sched/sched.h:1501
Code: 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 41 56 53 48 89 fb eb 18 48 89 df e8 3e a1 64 0a e8 89 9a 36 00 fb 5b <41> 5e 41 5f c3 cc cc cc cc f3 0f 1e fa 49 bf 00 00 00 00 00 fc ff
RSP: 0018:ffffffff8e607b48 EFLAGS: 00000286
RAX: 1345712f5871b300 RBX: ffff8880b903eac0 RCX: ffffffff94f9b903
RDX: dffffc0000000000 RSI: ffffffff8c0acac0 RDI: ffffffff8c6088c0
RBP: ffffffff8e607d48 R08: ffffffff901c362f R09: 1ffffffff20386c5
R10: dffffc0000000000 R11: fffffbfff20386c6 R12: ffff8880b903f648
R13: ffffffff8e694640 R14: ffff8880b903f8d8 R15: dffffc0000000000
 __schedule+0x1a91/0x4b30 kernel/sched/core.c:6681
 schedule_idle+0x53/0x90 kernel/sched/core.c:6795
 do_idle+0x56a/0x5d0 kernel/sched/idle.c:354
 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424
 rest_init+0x2dc/0x300 init/main.c:747
 start_kernel+0x47f/0x500 init/main.c:1105
 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
 x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488
 common_startup_64+0x13e/0x147
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 90 90 90 90 90    	add    %dl,-0x6f6f6f70(%rax)
   6:	90                   	nop
   7:	90                   	nop
   8:	90                   	nop
   9:	90                   	nop
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	41 57                	push   %r15
  13:	41 56                	push   %r14
  15:	53                   	push   %rbx
  16:	48 89 fb             	mov    %rdi,%rbx
  19:	eb 18                	jmp    0x33
  1b:	48 89 df             	mov    %rbx,%rdi
  1e:	e8 3e a1 64 0a       	call   0xa64a161
  23:	e8 89 9a 36 00       	call   0x369ab1
  28:	fb                   	sti
  29:	5b                   	pop    %rbx
* 2a:	41 5e                	pop    %r14 <-- trapping instruction
  2c:	41 5f                	pop    %r15
  2e:	c3                   	ret
  2f:	cc                   	int3
  30:	cc                   	int3
  31:	cc                   	int3
  32:	cc                   	int3
  33:	f3 0f 1e fa          	endbr64
  37:	49                   	rex.WB
  38:	bf 00 00 00 00       	mov    $0x0,%edi
  3d:	00 fc                	add    %bh,%ah
  3f:	ff                   	.byte 0xff