------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted
------------------------------------------------------
syz-executor.3/5240 is trying to acquire lock:
ffffffff8d6c1f80 (console_owner){....}-{0:0}, at: console_lock_spinning_enable kernel/printk/printk.c:1873 [inline]
ffffffff8d6c1f80 (console_owner){....}-{0:0}, at: console_emit_next_record kernel/printk/printk.c:2901 [inline]
ffffffff8d6c1f80 (console_owner){....}-{0:0}, at: console_flush_all+0x4ff/0xd70 kernel/printk/printk.c:2973

but task is already holding lock:
ffff8880b953d618 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x39e/0x1170 kernel/workqueue.c:2360

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&pool->lock){-.-.}-{2:2}:
       __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
       _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
       __queue_work+0x39e/0x1170 kernel/workqueue.c:2360
       queue_work_on+0xf4/0x120 kernel/workqueue.c:2435
       queue_work include/linux/workqueue.h:605 [inline]
       rpm_suspend+0xe36/0x11c0 drivers/base/power/runtime.c:662
       rpm_idle+0x58c/0x700 drivers/base/power/runtime.c:536
       __pm_runtime_idle+0xbc/0x160 drivers/base/power/runtime.c:1104
       pm_runtime_put include/linux/pm_runtime.h:448 [inline]
       __device_attach+0x382/0x4b0 drivers/base/dd.c:1048
       bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:532
       device_add+0x1188/0x1ab0 drivers/base/core.c:3639
       serial_base_port_add+0x357/0x4b0 drivers/tty/serial/serial_base_bus.c:178
       serial_core_port_device_add drivers/tty/serial/serial_core.c:3353 [inline]
       serial_core_register_port+0x13d/0x1b70 drivers/tty/serial/serial_core.c:3394
       serial8250_register_8250_port+0x1410/0x2090 drivers/tty/serial/8250/8250_core.c:1138
       serial_pnp_probe+0x47d/0x890 drivers/tty/serial/8250/8250_pnp.c:478
       pnp_device_probe+0x2a8/0x4d0 drivers/pnp/driver.c:111
       call_driver_probe drivers/base/dd.c:579 [inline]
       really_probe+0x23d/0xcb0 drivers/base/dd.c:658
       __driver_probe_device+0x1de/0x4b0 drivers/base/dd.c:800
       driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:830
       __driver_attach+0x283/0x580 drivers/base/dd.c:1216
       bus_for_each_dev+0x13f/0x1d0 drivers/base/bus.c:368
       bus_add_driver+0x2ed/0x640 drivers/base/bus.c:673
       driver_register+0x15c/0x4b0 drivers/base/driver.c:246
       serial8250_init+0xbe/0x4c0 drivers/tty/serial/8250/8250_core.c:1239
       do_one_initcall+0x12b/0x690 init/main.c:1241
       do_initcall_level init/main.c:1303 [inline]
       do_initcalls init/main.c:1319 [inline]
       do_basic_setup init/main.c:1338 [inline]
       kernel_init_freeable+0x69d/0xc40 init/main.c:1550
       kernel_init+0x1c/0x2a0 init/main.c:1439
       ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243

-> #2 (&dev->power.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
       __pm_runtime_resume+0xa9/0x170 drivers/base/power/runtime.c:1171
       pm_runtime_get include/linux/pm_runtime.h:396 [inline]
       __uart_start+0x1b0/0x440 drivers/tty/serial/serial_core.c:148
       uart_write+0x301/0x5a0 drivers/tty/serial/serial_core.c:615
       process_output_block drivers/tty/n_tty.c:574 [inline]
       n_tty_write+0x426/0x1150 drivers/tty/n_tty.c:2379
       iterate_tty_write drivers/tty/tty_io.c:1021 [inline]
       file_tty_write.constprop.0+0x51b/0x9b0 drivers/tty/tty_io.c:1096
       tty_write drivers/tty/tty_io.c:1117 [inline]
       redirected_tty_write drivers/tty/tty_io.c:1140 [inline]
       redirected_tty_write+0xaa/0xd0 drivers/tty/tty_io.c:1120
       call_write_iter include/linux/fs.h:2108 [inline]
       new_sync_write fs/read_write.c:497 [inline]
       vfs_write+0x6de/0x1100 fs/read_write.c:590
       ksys_write+0x12f/0x260 fs/read_write.c:643
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xd5/0x260 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x6d/0x75

-> #1 (&port_lock_key){-...}-{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
       uart_port_lock_irqsave include/linux/serial_core.h:616 [inline]
       serial8250_console_write+0xaa6/0x1090 drivers/tty/serial/8250/8250_port.c:3403
       console_emit_next_record kernel/printk/printk.c:2907 [inline]
       console_flush_all+0x53f/0xd70 kernel/printk/printk.c:2973
       console_unlock+0xae/0x290 kernel/printk/printk.c:3042
       vprintk_emit kernel/printk/printk.c:2342 [inline]
       vprintk_emit+0x11a/0x5a0 kernel/printk/printk.c:2297
       vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:45
       _printk+0xc8/0x100 kernel/printk/printk.c:2367
       register_console+0xa7b/0x1060 kernel/printk/printk.c:3548
       univ8250_console_init+0x35/0x50 drivers/tty/serial/8250/8250_core.c:717
       console_init+0xcc/0x5e0 kernel/printk/printk.c:3694
       start_kernel+0x259/0x490 init/main.c:1012
       x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:509
       x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:490
       common_startup_64+0x13e/0x148

-> #0 (console_owner){....}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3134 [inline]
       check_prevs_add kernel/locking/lockdep.c:3253 [inline]
       validate_chain kernel/locking/lockdep.c:3869 [inline]
       __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137
       lock_acquire kernel/locking/lockdep.c:5754 [inline]
       lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719
       console_lock_spinning_enable kernel/printk/printk.c:1873 [inline]
       console_emit_next_record kernel/printk/printk.c:2901 [inline]
       console_flush_all+0x514/0xd70 kernel/printk/printk.c:2973
       console_unlock+0xae/0x290 kernel/printk/printk.c:3042
       vprintk_emit kernel/printk/printk.c:2342 [inline]
       vprintk_emit+0x11a/0x5a0 kernel/printk/printk.c:2297
       vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:45
       _printk+0xc8/0x100 kernel/printk/printk.c:2367
       __report_bug lib/bug.c:195 [inline]
       report_bug+0x4ac/0x580 lib/bug.c:219
       handle_bug+0x3d/0x70 arch/x86/kernel/traps.c:239
       exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:260
       asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621
       __local_bh_enable_ip+0xc3/0x120 kernel/softirq.c:362
       spin_unlock_bh include/linux/spinlock.h:396 [inline]
       sock_hash_delete_elem+0x1f4/0x260 net/core/sock_map.c:947
       bpf_prog_2c29ac5cdc6b1842+0x42/0x4a
       bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
       __bpf_prog_run include/linux/filter.h:657 [inline]
       bpf_prog_run include/linux/filter.h:664 [inline]
       __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline]
       bpf_trace_run1+0x14c/0x410 kernel/trace/bpf_trace.c:2419
       __bpf_trace_workqueue_activate_work+0x98/0xd0 include/trace/events/workqueue.h:59
       trace_workqueue_activate_work include/trace/events/workqueue.h:59 [inline]
       __queue_work+0xd0d/0x1170 kernel/workqueue.c:2399
       queue_work_on+0xf4/0x120 kernel/workqueue.c:2435
       bpf_prog_load+0x19c8/0x2660 kernel/bpf/syscall.c:2944
       __sys_bpf+0x9b4/0x4b40 kernel/bpf/syscall.c:5631
       __do_sys_bpf kernel/bpf/syscall.c:5738 [inline]
       __se_sys_bpf kernel/bpf/syscall.c:5736 [inline]
       __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5736
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xd5/0x260 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x6d/0x75

other info that might help us debug this:

Chain exists of:
  console_owner --> &dev->power.lock --> &pool->lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&pool->lock);
                               lock(&dev->power.lock);
                               lock(&pool->lock);
  lock(console_owner);

 *** DEADLOCK ***

5 locks held by syz-executor.3/5240:
 #0: ffffffff8d7b49e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #0: ffffffff8d7b49e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #0: ffffffff8d7b49e0 (rcu_read_lock){....}-{1:2}, at: __queue_work+0xf2/0x1170 kernel/workqueue.c:2324
 #1: ffff8880b953d618 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x39e/0x1170 kernel/workqueue.c:2360
 #2: ffffffff8d7b49e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #2: ffffffff8d7b49e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #2: ffffffff8d7b49e0 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2380 [inline]
 #2: ffffffff8d7b49e0 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run1+0xdc/0x410 kernel/trace/bpf_trace.c:2419
 #3: ffffffff8d7a23c0 (console_lock){+.+.}-{0:0}, at: vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:45
 #4: ffffffff8d7a2430 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:303 [inline]
 #4: ffffffff8d7a2430 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline]
 #4: ffffffff8d7a2430 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:286 [inline]
 #4: ffffffff8d7a2430 (console_srcu){....}-{0:0}, at: console_flush_all+0x12d/0xd70 kernel/printk/printk.c:2965

stack backtrace:
CPU: 1 PID: 5240 Comm: syz-executor.3 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2187
 check_prev_add kernel/locking/lockdep.c:3134 [inline]
 check_prevs_add kernel/locking/lockdep.c:3253 [inline]
 validate_chain kernel/locking/lockdep.c:3869 [inline]
 __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137
 lock_acquire kernel/locking/lockdep.c:5754 [inline]
 lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719
 console_lock_spinning_enable kernel/printk/printk.c:1873 [inline]
 console_emit_next_record kernel/printk/printk.c:2901 [inline]
 console_flush_all+0x514/0xd70 kernel/printk/printk.c:2973
 console_unlock+0xae/0x290 kernel/printk/printk.c:3042
 vprintk_emit kernel/printk/printk.c:2342 [inline]
 vprintk_emit+0x11a/0x5a0 kernel/printk/printk.c:2297
 vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:45
 _printk+0xc8/0x100 kernel/printk/printk.c:2367
 __report_bug lib/bug.c:195 [inline]
 report_bug+0x4ac/0x580 lib/bug.c:219
 handle_bug+0x3d/0x70 arch/x86/kernel/traps.c:239
 exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:260
 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621
RIP: 0010:__local_bh_enable_ip+0xc3/0x120 kernel/softirq.c:362
Code: 00 e8 b1 6c 0b 00 e8 cc 68 42 00 fb 65 8b 05 0c f1 b0 7e 85 c0 74 52 5b 5d e9 d9 44 84 09 65 8b 05 4e a5 af 7e 85 c0 75 9e 90 <0f> 0b 90 eb 98 e8 f3 66 42 00 eb 99 48 89 ef e8 29 e0 19 00 eb a2
RSP: 0018:ffffc90004a5f8a0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000201 RCX: 1ffffffff1f3eed7
RDX: 0000000000000000 RSI: 0000000000000201 RDI: ffffffff88cc0674
RBP: ffffffff88cc0674 R08: 0000000000000000 R09: ffffed10043db401
R10: ffff888021eda00b R11: ffffffff934980a8 R12: fffffffffffffffe
R13: ffff888021eda008 R14: ffff888021eda000 R15: 00000000049396b8
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 sock_hash_delete_elem+0x1f4/0x260 net/core/sock_map.c:947
 bpf_prog_2c29ac5cdc6b1842+0x42/0x4a
 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
 __bpf_prog_run include/linux/filter.h:657 [inline]
 bpf_prog_run include/linux/filter.h:664 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline]
 bpf_trace_run1+0x14c/0x410 kernel/trace/bpf_trace.c:2419
 __bpf_trace_workqueue_activate_work+0x98/0xd0 include/trace/events/workqueue.h:59
 trace_workqueue_activate_work include/trace/events/workqueue.h:59 [inline]
 __queue_work+0xd0d/0x1170 kernel/workqueue.c:2399
 queue_work_on+0xf4/0x120 kernel/workqueue.c:2435
 bpf_prog_load+0x19c8/0x2660 kernel/bpf/syscall.c:2944
 __sys_bpf+0x9b4/0x4b40 kernel/bpf/syscall.c:5631
 __do_sys_bpf kernel/bpf/syscall.c:5738 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5736 [inline]
 __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5736
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd5/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f501147de69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f50121a50c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f50115abf80 RCX: 00007f501147de69
RDX: 0000000000000090 RSI: 0000000020000180 RDI: 0000000000000005
RBP: 00007f50114ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f50115abf80 R15: 00007fff688b0908
 </TASK>
WARNING: CPU: 1 PID: 5240 at kernel/softirq.c:362 __local_bh_enable_ip+0xc3/0x120 kernel/softirq.c:362
Modules linked in:
CPU: 1 PID: 5240 Comm: syz-executor.3 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__local_bh_enable_ip+0xc3/0x120 kernel/softirq.c:362
Code: 00 e8 b1 6c 0b 00 e8 cc 68 42 00 fb 65 8b 05 0c f1 b0 7e 85 c0 74 52 5b 5d e9 d9 44 84 09 65 8b 05 4e a5 af 7e 85 c0 75 9e 90 <0f> 0b 90 eb 98 e8 f3 66 42 00 eb 99 48 89 ef e8 29 e0 19 00 eb a2
RSP: 0018:ffffc90004a5f8a0 EFLAGS: 00010046

RAX: 0000000000000000 RBX: 0000000000000201 RCX: 1ffffffff1f3eed7
RDX: 0000000000000000 RSI: 0000000000000201 RDI: ffffffff88cc0674
RBP: ffffffff88cc0674 R08: 0000000000000000 R09: ffffed10043db401
R10: ffff888021eda00b R11: ffffffff934980a8 R12: fffffffffffffffe
R13: ffff888021eda008 R14: ffff888021eda000 R15: 00000000049396b8
FS:  00007f50121a56c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000005a9aa000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 sock_hash_delete_elem+0x1f4/0x260 net/core/sock_map.c:947
 bpf_prog_2c29ac5cdc6b1842+0x42/0x4a
 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
 __bpf_prog_run include/linux/filter.h:657 [inline]
 bpf_prog_run include/linux/filter.h:664 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline]
 bpf_trace_run1+0x14c/0x410 kernel/trace/bpf_trace.c:2419
 __bpf_trace_workqueue_activate_work+0x98/0xd0 include/trace/events/workqueue.h:59
 trace_workqueue_activate_work include/trace/events/workqueue.h:59 [inline]
 __queue_work+0xd0d/0x1170 kernel/workqueue.c:2399
 queue_work_on+0xf4/0x120 kernel/workqueue.c:2435
 bpf_prog_load+0x19c8/0x2660 kernel/bpf/syscall.c:2944
 __sys_bpf+0x9b4/0x4b40 kernel/bpf/syscall.c:5631
 __do_sys_bpf kernel/bpf/syscall.c:5738 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5736 [inline]
 __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5736
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd5/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f501147de69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f50121a50c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f50115abf80 RCX: 00007f501147de69
RDX: 0000000000000090 RSI: 0000000020000180 RDI: 0000000000000005
RBP: 00007f50114ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f50115abf80 R15: 00007fff688b0908
 </TASK>