------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
5.18.0-rc3-next-20220420-syzkaller #0 Tainted: G S               
------------------------------------------------------
syz-executor.4/18403 is trying to acquire lock:
ffffffff8bd73b18 ((console_sem).lock){-.-.}-{2:2}, at: down_trylock+0xe/0x60 kernel/locking/semaphore.c:139

but task is already holding lock:
ffffffff8be0ba38 (trace_printk_lock){....}-{2:2}, at: ____bpf_trace_printk kernel/trace/bpf_trace.c:385 [inline]
ffffffff8be0ba38 (trace_printk_lock){....}-{2:2}, at: bpf_trace_printk+0xcf/0x170 kernel/trace/bpf_trace.c:371

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (trace_printk_lock){....}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
       ____bpf_trace_printk kernel/trace/bpf_trace.c:385 [inline]
       bpf_trace_printk+0xcf/0x170 kernel/trace/bpf_trace.c:371
       bpf_prog_0605f9f479290f07+0x2f/0x33
       bpf_dispatcher_nop_func include/linux/bpf.h:804 [inline]
       __bpf_prog_run include/linux/filter.h:628 [inline]
       bpf_prog_run include/linux/filter.h:635 [inline]
       __bpf_trace_run kernel/trace/bpf_trace.c:2022 [inline]
       bpf_trace_run4+0x124/0x360 kernel/trace/bpf_trace.c:2061
       __bpf_trace_sched_switch+0x115/0x160 include/trace/events/sched.h:222
       __traceiter_sched_switch+0x68/0xb0 include/trace/events/sched.h:222
       trace_sched_switch include/trace/events/sched.h:222 [inline]
       __schedule+0x1543/0x4cc0 kernel/sched/core.c:6419
       schedule+0xd2/0x1f0 kernel/sched/core.c:6494
       freezable_schedule include/linux/freezer.h:172 [inline]
       futex_wait_queue+0x144/0x3b0 kernel/futex/waitwake.c:355
       futex_wait+0x2c9/0x670 kernel/futex/waitwake.c:656
       do_futex+0x1af/0x300 kernel/futex/syscalls.c:106
       __do_sys_futex kernel/futex/syscalls.c:183 [inline]
       __se_sys_futex kernel/futex/syscalls.c:164 [inline]
       __x64_sys_futex+0x1b0/0x4a0 kernel/futex/syscalls.c:164
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x44/0xae

-> #2 (&rq->__lock){-.-.}-{2:2}:
       _raw_spin_lock_nested+0x30/0x40 kernel/locking/spinlock.c:378
       raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:541
       raw_spin_rq_lock kernel/sched/sched.h:1304 [inline]
       rq_lock kernel/sched/sched.h:1602 [inline]
       task_fork_fair+0x68/0x520 kernel/sched/fair.c:11266
       sched_cgroup_fork+0x340/0x480 kernel/sched/core.c:4579
       copy_process+0x42f0/0x6fe0 kernel/fork.c:2351
       kernel_clone+0xe7/0xab0 kernel/fork.c:2639
       kernel_thread+0xb5/0xf0 kernel/fork.c:2698
       rest_init+0x23/0x3e0 init/main.c:693
       start_kernel+0x47f/0x4a0 init/main.c:1143
       secondary_startup_64_no_verify+0xce/0xdb

-> #1 (&p->pi_lock){-.-.}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
       try_to_wake_up+0xaa/0x1800 kernel/sched/core.c:4069
       up+0x75/0xb0 kernel/locking/semaphore.c:191
       __up_console_sem+0xa4/0xc0 kernel/printk/printk.c:263
       console_unlock+0x62c/0xdd0 kernel/printk/printk.c:2794
       vprintk_emit+0x1b4/0x5f0 kernel/printk/printk.c:2272
       dev_vprintk_emit+0x36e/0x3b2 drivers/base/core.c:4604
       dev_printk_emit+0xba/0xf1 drivers/base/core.c:4615
       __dev_printk+0xcf/0xf5 drivers/base/core.c:4627
       _dev_warn+0xd7/0x109 drivers/base/core.c:4671
       usb_parse_configuration drivers/usb/core/config.c:661 [inline]
       usb_get_configuration.cold+0x6a/0x14f6 drivers/usb/core/config.c:944
       usb_enumerate_device drivers/usb/core/hub.c:2398 [inline]
       usb_new_device+0x583/0x7d0 drivers/usb/core/hub.c:2536
       hub_port_connect drivers/usb/core/hub.c:5363 [inline]
       hub_port_connect_change drivers/usb/core/hub.c:5507 [inline]
       port_event drivers/usb/core/hub.c:5665 [inline]
       hub_event+0x25c6/0x4680 drivers/usb/core/hub.c:5747
       process_one_work+0x996/0x1610 kernel/workqueue.c:2289
       worker_thread+0x665/0x1080 kernel/workqueue.c:2436
       kthread+0x2e9/0x3a0 kernel/kthread.c:376
       ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

-> #0 ((console_sem).lock){-.-.}-{2:2}:
       check_prev_add kernel/locking/lockdep.c:3095 [inline]
       check_prevs_add kernel/locking/lockdep.c:3214 [inline]
       validate_chain kernel/locking/lockdep.c:3829 [inline]
       __lock_acquire+0x2abe/0x5660 kernel/locking/lockdep.c:5053
       lock_acquire kernel/locking/lockdep.c:5665 [inline]
       lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
       down_trylock+0xe/0x60 kernel/locking/semaphore.c:139
       __down_trylock_console_sem+0x40/0x120 kernel/printk/printk.c:246
       console_trylock kernel/printk/printk.c:2581 [inline]
       console_trylock_spinning kernel/printk/printk.c:1856 [inline]
       vprintk_emit+0x162/0x5f0 kernel/printk/printk.c:2271
       vprintk+0x80/0x90 kernel/printk/printk_safe.c:50
       _printk+0xba/0xed kernel/printk/printk.c:2293
       __warn_printk+0x9b/0xf3 kernel/panic.c:662
       rb_check_timestamp kernel/trace/ring_buffer.c:2734 [inline]
       rb_add_timestamp kernel/trace/ring_buffer.c:2772 [inline]
       rb_update_event kernel/trace/ring_buffer.c:2809 [inline]
       __rb_reserve_next+0x121a/0x1630 kernel/trace/ring_buffer.c:3565
       rb_reserve_next_event kernel/trace/ring_buffer.c:3635 [inline]
       ring_buffer_lock_reserve+0x44f/0xfa0 kernel/trace/ring_buffer.c:3694
       __trace_buffer_lock_reserve kernel/trace/trace.c:949 [inline]
       trace_event_buffer_lock_reserve+0x11e/0x730 kernel/trace/trace.c:2821
       trace_event_buffer_reserve+0x248/0x3c0 kernel/trace/trace_events.c:496
       trace_event_raw_event_bpf_trace_printk+0xe9/0x1f0 kernel/trace/./bpf_trace.h:11
       trace_bpf_trace_printk+0x116/0x220 kernel/trace/bpf_trace.h:11
       ____bpf_trace_printk kernel/trace/bpf_trace.c:388 [inline]
       bpf_trace_printk+0xfa/0x170 kernel/trace/bpf_trace.c:371
       bpf_prog_0605f9f479290f07+0x2f/0x33
       bpf_dispatcher_nop_func include/linux/bpf.h:804 [inline]
       __bpf_prog_run include/linux/filter.h:628 [inline]
       bpf_prog_run include/linux/filter.h:635 [inline]
       __bpf_trace_run kernel/trace/bpf_trace.c:2022 [inline]
       bpf_trace_run4+0x124/0x360 kernel/trace/bpf_trace.c:2061
       __bpf_trace_sched_switch+0x115/0x160 include/trace/events/sched.h:222
       __traceiter_sched_switch+0x68/0xb0 include/trace/events/sched.h:222
       trace_sched_switch include/trace/events/sched.h:222 [inline]
       __schedule+0x1543/0x4cc0 kernel/sched/core.c:6419
       schedule+0xd2/0x1f0 kernel/sched/core.c:6494
       freezable_schedule include/linux/freezer.h:172 [inline]
       futex_wait_queue+0x144/0x3b0 kernel/futex/waitwake.c:355
       futex_wait+0x2c9/0x670 kernel/futex/waitwake.c:656
       do_futex+0x1af/0x300 kernel/futex/syscalls.c:106
       __do_sys_futex kernel/futex/syscalls.c:183 [inline]
       __se_sys_futex kernel/futex/syscalls.c:164 [inline]
       __x64_sys_futex+0x1b0/0x4a0 kernel/futex/syscalls.c:164
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x44/0xae

other info that might help us debug this:

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

 Possible unsafe locking scenario:

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

 *** DEADLOCK ***

3 locks held by syz-executor.4/18403:
 #0: ffff8880b9c3a018 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:549 [inline]
 #0: ffff8880b9c3a018 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x8c/0x120 kernel/sched/core.c:534
 #1: ffffffff8bd84f60 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x0/0x360 include/linux/filter.h:628
 #2: ffffffff8be0ba38 (trace_printk_lock){....}-{2:2}, at: ____bpf_trace_printk kernel/trace/bpf_trace.c:385 [inline]
 #2: ffffffff8be0ba38 (trace_printk_lock){....}-{2:2}, at: bpf_trace_printk+0xcf/0x170 kernel/trace/bpf_trace.c:371

stack backtrace:
CPU: 0 PID: 18403 Comm: syz-executor.4 Tainted: G S                5.18.0-rc3-next-20220420-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2175
 check_prev_add kernel/locking/lockdep.c:3095 [inline]
 check_prevs_add kernel/locking/lockdep.c:3214 [inline]
 validate_chain kernel/locking/lockdep.c:3829 [inline]
 __lock_acquire+0x2abe/0x5660 kernel/locking/lockdep.c:5053
 lock_acquire kernel/locking/lockdep.c:5665 [inline]
 lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
 down_trylock+0xe/0x60 kernel/locking/semaphore.c:139
 __down_trylock_console_sem+0x40/0x120 kernel/printk/printk.c:246
 console_trylock kernel/printk/printk.c:2581 [inline]
 console_trylock_spinning kernel/printk/printk.c:1856 [inline]
 vprintk_emit+0x162/0x5f0 kernel/printk/printk.c:2271
 vprintk+0x80/0x90 kernel/printk/printk_safe.c:50
 _printk+0xba/0xed kernel/printk/printk.c:2293
 __warn_printk+0x9b/0xf3 kernel/panic.c:662
 rb_check_timestamp kernel/trace/ring_buffer.c:2734 [inline]
 rb_add_timestamp kernel/trace/ring_buffer.c:2772 [inline]
 rb_update_event kernel/trace/ring_buffer.c:2809 [inline]
 __rb_reserve_next+0x121a/0x1630 kernel/trace/ring_buffer.c:3565
 rb_reserve_next_event kernel/trace/ring_buffer.c:3635 [inline]
 ring_buffer_lock_reserve+0x44f/0xfa0 kernel/trace/ring_buffer.c:3694
 __trace_buffer_lock_reserve kernel/trace/trace.c:949 [inline]
 trace_event_buffer_lock_reserve+0x11e/0x730 kernel/trace/trace.c:2821
 trace_event_buffer_reserve+0x248/0x3c0 kernel/trace/trace_events.c:496
 trace_event_raw_event_bpf_trace_printk+0xe9/0x1f0 kernel/trace/./bpf_trace.h:11
 trace_bpf_trace_printk+0x116/0x220 kernel/trace/bpf_trace.h:11
 ____bpf_trace_printk kernel/trace/bpf_trace.c:388 [inline]
 bpf_trace_printk+0xfa/0x170 kernel/trace/bpf_trace.c:371
 bpf_prog_0605f9f479290f07+0x2f/0x33
 bpf_dispatcher_nop_func include/linux/bpf.h:804 [inline]
 __bpf_prog_run include/linux/filter.h:628 [inline]
 bpf_prog_run include/linux/filter.h:635 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2022 [inline]
 bpf_trace_run4+0x124/0x360 kernel/trace/bpf_trace.c:2061
 __bpf_trace_sched_switch+0x115/0x160 include/trace/events/sched.h:222
 __traceiter_sched_switch+0x68/0xb0 include/trace/events/sched.h:222
 trace_sched_switch include/trace/events/sched.h:222 [inline]
 __schedule+0x1543/0x4cc0 kernel/sched/core.c:6419
 schedule+0xd2/0x1f0 kernel/sched/core.c:6494
 freezable_schedule include/linux/freezer.h:172 [inline]
 futex_wait_queue+0x144/0x3b0 kernel/futex/waitwake.c:355
 futex_wait+0x2c9/0x670 kernel/futex/waitwake.c:656
 do_futex+0x1af/0x300 kernel/futex/syscalls.c:106
 __do_sys_futex kernel/futex/syscalls.c:183 [inline]
 __se_sys_futex kernel/futex/syscalls.c:164 [inline]
 __x64_sys_futex+0x1b0/0x4a0 kernel/futex/syscalls.c:164
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fe98d2890e9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe98e347218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fe98d39bf68 RCX: 00007fe98d2890e9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe98d39bf68
RBP: 00007fe98d39bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe98d39bf6c
R13: 00007ffcf281facf R14: 00007fe98e347300 R15: 0000000000022000
 </TASK>
Delta way too big! 8384064400207366907 ts=8384064985914658379 before=585707291472 after=585707291472 write stamp=8384064985914658379
WARNING: CPU: 0 PID: 18403 at kernel/trace/ring_buffer.c:2734 rb_check_timestamp kernel/trace/ring_buffer.c:2734 [inline]
WARNING: CPU: 0 PID: 18403 at kernel/trace/ring_buffer.c:2734 rb_add_timestamp kernel/trace/ring_buffer.c:2772 [inline]
WARNING: CPU: 0 PID: 18403 at kernel/trace/ring_buffer.c:2734 rb_update_event kernel/trace/ring_buffer.c:2809 [inline]
WARNING: CPU: 0 PID: 18403 at kernel/trace/ring_buffer.c:2734 __rb_reserve_next+0x121a/0x1630 kernel/trace/ring_buffer.c:3565
Modules linked in:
CPU: 0 PID: 18403 Comm: syz-executor.4 Tainted: G S                5.18.0-rc3-next-20220420-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rb_check_timestamp kernel/trace/ring_buffer.c:2734 [inline]
RIP: 0010:rb_add_timestamp kernel/trace/ring_buffer.c:2772 [inline]
RIP: 0010:rb_update_event kernel/trace/ring_buffer.c:2809 [inline]
RIP: 0010:__rb_reserve_next+0x121a/0x1630 kernel/trace/ring_buffer.c:3565
Code: 80 3c 01 00 0f 85 98 02 00 00 ff 74 24 40 49 89 d8 4c 89 f1 48 c7 c7 c0 5e d1 89 49 8b 74 24 08 4c 8b 4c 24 20 e8 af 6e ac 07 <0f> 0b 58 e9 89 fe ff ff e8 d9 ec 49 00 e9 0f ee ff ff 48 89 ef e8
RSP: 0018:ffffc90005127418 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 000000885ee00350 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff81608bd8 RDI: fffff52000a24e75
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff816035ae R11: 0000000000000000 R12: ffffc90005127550
R13: ffff888010c68800 R14: 000000885ee00350 R15: 0000000000000dd4
FS:  00007fe98e347700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe98d39d090 CR3: 00000000199c5000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000003b DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 rb_reserve_next_event kernel/trace/ring_buffer.c:3635 [inline]
 ring_buffer_lock_reserve+0x44f/0xfa0 kernel/trace/ring_buffer.c:3694
 __trace_buffer_lock_reserve kernel/trace/trace.c:949 [inline]
 trace_event_buffer_lock_reserve+0x11e/0x730 kernel/trace/trace.c:2821
 trace_event_buffer_reserve+0x248/0x3c0 kernel/trace/trace_events.c:496
 trace_event_raw_event_bpf_trace_printk+0xe9/0x1f0 kernel/trace/./bpf_trace.h:11
 trace_bpf_trace_printk+0x116/0x220 kernel/trace/bpf_trace.h:11
 ____bpf_trace_printk kernel/trace/bpf_trace.c:388 [inline]
 bpf_trace_printk+0xfa/0x170 kernel/trace/bpf_trace.c:371
 bpf_prog_0605f9f479290f07+0x2f/0x33
 bpf_dispatcher_nop_func include/linux/bpf.h:804 [inline]
 __bpf_prog_run include/linux/filter.h:628 [inline]
 bpf_prog_run include/linux/filter.h:635 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2022 [inline]
 bpf_trace_run4+0x124/0x360 kernel/trace/bpf_trace.c:2061
 __bpf_trace_sched_switch+0x115/0x160 include/trace/events/sched.h:222
 __traceiter_sched_switch+0x68/0xb0 include/trace/events/sched.h:222
 trace_sched_switch include/trace/events/sched.h:222 [inline]
 __schedule+0x1543/0x4cc0 kernel/sched/core.c:6419
 schedule+0xd2/0x1f0 kernel/sched/core.c:6494
 freezable_schedule include/linux/freezer.h:172 [inline]
 futex_wait_queue+0x144/0x3b0 kernel/futex/waitwake.c:355
 futex_wait+0x2c9/0x670 kernel/futex/waitwake.c:656
 do_futex+0x1af/0x300 kernel/futex/syscalls.c:106
 __do_sys_futex kernel/futex/syscalls.c:183 [inline]
 __se_sys_futex kernel/futex/syscalls.c:164 [inline]
 __x64_sys_futex+0x1b0/0x4a0 kernel/futex/syscalls.c:164
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fe98d2890e9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe98e347218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fe98d39bf68 RCX: 00007fe98d2890e9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe98d39bf68
RBP: 00007fe98d39bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe98d39bf6c
R13: 00007ffcf281facf R14: 00007fe98e347300 R15: 0000000000022000
 </TASK>