------------[ cut here ]------------ ====================================================== WARNING: possible circular locking dependency detected 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted ------------------------------------------------------ kworker/u8:7/2392 is trying to acquire lock: ffffffff8e126300 (console_owner){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:303 [inline] ffffffff8e126300 (console_owner){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline] ffffffff8e126300 (console_owner){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:286 [inline] ffffffff8e126300 (console_owner){....}-{0:0}, at: console_flush_all+0x152/0xfd0 kernel/printk/printk.c:2965 but task is already holding lock: ffff888016ee8120 ((worker)->lock){....}-{2:2}, at: kthread_queue_work+0x27/0x180 kernel/kthread.c:1019 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 ((worker)->lock){....}-{2:2}: lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 kthread_queue_work+0x27/0x180 kernel/kthread.c:1019 put_pwq kernel/workqueue.c:1642 [inline] put_pwq_unlocked+0x12a/0x190 kernel/workqueue.c:1659 apply_wqattrs_cleanup kernel/workqueue.c:5098 [inline] apply_workqueue_attrs_locked+0x132/0x210 kernel/workqueue.c:5219 apply_workqueue_attrs+0x30/0x50 kernel/workqueue.c:5249 padata_setup_cpumasks kernel/padata.c:435 [inline] padata_alloc+0x22b/0x370 kernel/padata.c:1014 pcrypt_init_padata+0x27/0x100 crypto/pcrypt.c:327 pcrypt_init+0x65/0xe0 crypto/pcrypt.c:352 do_one_initcall+0x23a/0x830 init/main.c:1241 do_initcall_level+0x157/0x210 init/main.c:1303 do_initcalls+0x3f/0x80 init/main.c:1319 kernel_init_freeable+0x435/0x5d0 init/main.c:1550 kernel_init+0x1d/0x2a0 init/main.c:1439 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 -> #3 (&pool->lock){-.-.}-{2:2}: lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 __queue_work+0x6ec/0xec0 queue_work_on+0x14f/0x250 kernel/workqueue.c:2435 queue_work include/linux/workqueue.h:605 [inline] rpm_suspend+0xe99/0x1780 drivers/base/power/runtime.c:662 __pm_runtime_idle+0x131/0x1a0 drivers/base/power/runtime.c:1104 pm_runtime_put include/linux/pm_runtime.h:448 [inline] __device_attach+0x3e5/0x520 drivers/base/dd.c:1048 bus_probe_device+0x189/0x260 drivers/base/bus.c:532 device_add+0x8ff/0xca0 drivers/base/core.c:3639 serial_base_port_add+0x2b6/0x3f0 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+0x393/0x1e30 drivers/tty/serial/serial_core.c:3394 serial8250_register_8250_port+0x1433/0x1cd0 drivers/tty/serial/8250/8250_core.c:1138 serial_pnp_probe+0x7d5/0xa20 drivers/tty/serial/8250/8250_pnp.c:478 pnp_device_probe+0x2bc/0x460 drivers/pnp/driver.c:111 really_probe+0x2a0/0xc50 drivers/base/dd.c:658 __driver_probe_device+0x1a2/0x3e0 drivers/base/dd.c:800 driver_probe_device+0x50/0x430 drivers/base/dd.c:830 __driver_attach+0x45f/0x710 drivers/base/dd.c:1216 bus_for_each_dev+0x23b/0x2b0 drivers/base/bus.c:368 bus_add_driver+0x347/0x620 drivers/base/bus.c:673 driver_register+0x23a/0x320 drivers/base/driver.c:246 serial8250_init+0x9e/0x170 drivers/tty/serial/8250/8250_core.c:1239 do_one_initcall+0x23a/0x830 init/main.c:1241 do_initcall_level+0x157/0x210 init/main.c:1303 do_initcalls+0x3f/0x80 init/main.c:1319 kernel_init_freeable+0x435/0x5d0 init/main.c:1550 kernel_init+0x1d/0x2a0 init/main.c:1439 ret_from_fork+0x4d/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}: lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 __pm_runtime_resume+0x112/0x180 drivers/base/power/runtime.c:1171 pm_runtime_get include/linux/pm_runtime.h:396 [inline] __uart_start+0x17a/0x3c0 drivers/tty/serial/serial_core.c:148 uart_write+0x427/0x5c0 drivers/tty/serial/serial_core.c:615 process_output_block drivers/tty/n_tty.c:574 [inline] n_tty_write+0xd6c/0x1230 drivers/tty/n_tty.c:2379 iterate_tty_write drivers/tty/tty_io.c:1021 [inline] file_tty_write+0x551/0x9b0 drivers/tty/tty_io.c:1096 call_write_iter include/linux/fs.h:2108 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa86/0xcb0 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_64+0xfd/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 -> #1 (&port_lock_key){-.-.}-{2:2}: lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 uart_port_lock_irqsave include/linux/serial_core.h:616 [inline] serial8250_console_write+0x1a8/0x1840 drivers/tty/serial/8250/8250_port.c:3403 console_emit_next_record kernel/printk/printk.c:2907 [inline] console_flush_all+0x867/0xfd0 kernel/printk/printk.c:2973 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3042 vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2342 _printk+0xd5/0x120 kernel/printk/printk.c:2367 register_console+0x70a/0xcd0 kernel/printk/printk.c:3548 univ8250_console_init+0x49/0x50 drivers/tty/serial/8250/8250_core.c:717 console_init+0x198/0x680 kernel/printk/printk.c:3694 start_kernel+0x2d3/0x500 init/main.c:1012 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:509 x86_64_start_kernel+0x99/0xa0 arch/x86/kernel/head64.c:490 common_startup_64+0x13e/0x147 -> #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+0x18cb/0x58e0 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754 console_lock_spinning_enable kernel/printk/printk.c:1873 [inline] console_emit_next_record kernel/printk/printk.c:2901 [inline] console_flush_all+0x810/0xfd0 kernel/printk/printk.c:2973 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3042 vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2342 _printk+0xd5/0x120 kernel/printk/printk.c:2367 __report_bug lib/bug.c:195 [inline] report_bug+0x346/0x500 lib/bug.c:219 handle_bug+0x3e/0x70 arch/x86/kernel/traps.c:239 exc_invalid_op+0x1a/0x50 arch/x86/kernel/traps.c:260 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621 __local_bh_enable_ip+0x1be/0x200 kernel/softirq.c:362 spin_unlock_bh include/linux/spinlock.h:396 [inline] __sock_map_delete net/core/sock_map.c:424 [inline] sock_map_delete_elem+0xca/0x140 net/core/sock_map.c:446 bpf_prog_d247abf228e51871+0x69/0x71 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_run2+0x206/0x420 kernel/trace/bpf_trace.c:2420 trace_sched_kthread_work_queue_work include/trace/events/sched.h:64 [inline] kthread_insert_work+0x3f4/0x460 kernel/kthread.c:993 kthread_queue_work+0xff/0x180 kernel/kthread.c:1021 synchronize_rcu_expedited_queue_work kernel/rcu/tree_exp.h:469 [inline] synchronize_rcu_expedited+0x593/0x820 kernel/rcu/tree_exp.h:949 synchronize_rcu+0x136/0x3e0 kernel/rcu/tree.c:3611 sock_map_free+0x29/0x3e0 net/core/sock_map.c:341 bpf_map_free_deferred+0xe8/0x110 kernel/bpf/syscall.c:734 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0xa02/0x1770 kernel/workqueue.c:3335 worker_thread+0x86d/0xd70 kernel/workqueue.c:3416 kthread+0x2f2/0x390 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 other info that might help us debug this: Chain exists of: console_owner --> &pool->lock --> (worker)->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock((worker)->lock); lock(&pool->lock); lock((worker)->lock); lock(console_owner); *** DEADLOCK *** 7 locks held by kworker/u8:7/2392: #0: ffff888014c79148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline] #0: ffff888014c79148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x1770 kernel/workqueue.c:3335 #1: ffffc90009027d00 ((work_completion)(&map->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline] #1: ffffc90009027d00 ((work_completion)(&map->work)){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335 #2: ffffffff8e1373b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline] #2: ffffffff8e1373b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x39a/0x820 kernel/rcu/tree_exp.h:939 #3: ffff888016ee8120 ((worker)->lock){....}-{2:2}, at: kthread_queue_work+0x27/0x180 kernel/kthread.c:1019 #4: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #4: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #4: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2380 [inline] #4: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x114/0x420 kernel/trace/bpf_trace.c:2420 #5: ffffffff8e00dc20 (console_lock){+.+.}-{0:0}, at: _printk+0xd5/0x120 kernel/printk/printk.c:2367 #6: ffffffff8e00d850 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:303 [inline] #6: ffffffff8e00d850 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline] #6: ffffffff8e00d850 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:286 [inline] #6: ffffffff8e00d850 (console_srcu){....}-{0:0}, at: console_flush_all+0x152/0xfd0 kernel/printk/printk.c:2965 stack backtrace: CPU: 1 PID: 2392 Comm: kworker/u8:7 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: events_unbound bpf_map_free_deferred Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 check_noncircular+0x36a/0x4a0 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+0x18cb/0x58e0 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754 console_lock_spinning_enable kernel/printk/printk.c:1873 [inline] console_emit_next_record kernel/printk/printk.c:2901 [inline] console_flush_all+0x810/0xfd0 kernel/printk/printk.c:2973 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3042 vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2342 _printk+0xd5/0x120 kernel/printk/printk.c:2367 __report_bug lib/bug.c:195 [inline] report_bug+0x346/0x500 lib/bug.c:219 handle_bug+0x3e/0x70 arch/x86/kernel/traps.c:239 exc_invalid_op+0x1a/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+0x1be/0x200 kernel/softirq.c:362 Code: 3b 44 24 60 75 52 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d e9 b3 da 25 0a 90 0f 0b 90 e9 ca fe ff ff e8 55 00 00 00 eb 9c 90 <0f> 0b 90 e9 fa fe ff ff 48 c7 c1 9c 6d 87 8f 80 e1 07 80 c1 03 38 RSP: 0018:ffffc900090274a0 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 1ffff92001204e98 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000201 RDI: ffffffff896400ba RBP: ffffc90009027560 R08: ffff88802e1cf9eb R09: 1ffff11005c39f3d R10: dffffc0000000000 R11: ffffed1005c39f3e R12: dffffc0000000000 R13: ffff88802e1c9800 R14: ffffc900090274e0 R15: 0000000000000201 spin_unlock_bh include/linux/spinlock.h:396 [inline] __sock_map_delete net/core/sock_map.c:424 [inline] sock_map_delete_elem+0xca/0x140 net/core/sock_map.c:446 bpf_prog_d247abf228e51871+0x69/0x71 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_run2+0x206/0x420 kernel/trace/bpf_trace.c:2420 trace_sched_kthread_work_queue_work include/trace/events/sched.h:64 [inline] kthread_insert_work+0x3f4/0x460 kernel/kthread.c:993 kthread_queue_work+0xff/0x180 kernel/kthread.c:1021 synchronize_rcu_expedited_queue_work kernel/rcu/tree_exp.h:469 [inline] synchronize_rcu_expedited+0x593/0x820 kernel/rcu/tree_exp.h:949 synchronize_rcu+0x136/0x3e0 kernel/rcu/tree.c:3611 sock_map_free+0x29/0x3e0 net/core/sock_map.c:341 bpf_map_free_deferred+0xe8/0x110 kernel/bpf/syscall.c:734 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0xa02/0x1770 kernel/workqueue.c:3335 worker_thread+0x86d/0xd70 kernel/workqueue.c:3416 kthread+0x2f2/0x390 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 WARNING: CPU: 1 PID: 2392 at kernel/softirq.c:362 __local_bh_enable_ip+0x1be/0x200 kernel/softirq.c:362 Modules linked in: CPU: 1 PID: 2392 Comm: kworker/u8:7 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: events_unbound bpf_map_free_deferred RIP: 0010:__local_bh_enable_ip+0x1be/0x200 kernel/softirq.c:362 Code: 3b 44 24 60 75 52 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d e9 b3 da 25 0a 90 0f 0b 90 e9 ca fe ff ff e8 55 00 00 00 eb 9c 90 <0f> 0b 90 e9 fa fe ff ff 48 c7 c1 9c 6d 87 8f 80 e1 07 80 c1 03 38 RSP: 0018:ffffc900090274a0 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 1ffff92001204e98 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000201 RDI: ffffffff896400ba RBP: ffffc90009027560 R08: ffff88802e1cf9eb R09: 1ffff11005c39f3d R10: dffffc0000000000 R11: ffffed1005c39f3e R12: dffffc0000000000 R13: ffff88802e1c9800 R14: ffffc900090274e0 R15: 0000000000000201 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f694159964c CR3: 000000000df32000 CR4: 0000000000350ef0 Call Trace: spin_unlock_bh include/linux/spinlock.h:396 [inline] __sock_map_delete net/core/sock_map.c:424 [inline] sock_map_delete_elem+0xca/0x140 net/core/sock_map.c:446 bpf_prog_d247abf228e51871+0x69/0x71 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_run2+0x206/0x420 kernel/trace/bpf_trace.c:2420 trace_sched_kthread_work_queue_work include/trace/events/sched.h:64 [inline] kthread_insert_work+0x3f4/0x460 kernel/kthread.c:993 kthread_queue_work+0xff/0x180 kernel/kthread.c:1021 synchronize_rcu_expedited_queue_work kernel/rcu/tree_exp.h:469 [inline] synchronize_rcu_expedited+0x593/0x820 kernel/rcu/tree_exp.h:949 synchronize_rcu+0x136/0x3e0 kernel/rcu/tree.c:3611 sock_map_free+0x29/0x3e0 net/core/sock_map.c:341 bpf_map_free_deferred+0xe8/0x110 kernel/bpf/syscall.c:734 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0xa02/0x1770 kernel/workqueue.c:3335 worker_thread+0x86d/0xd70 kernel/workqueue.c:3416 kthread+0x2f2/0x390 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243