syzbot

=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
5.15.137-syzkaller #0 Not tainted
-----------------------------------------------------
syz-executor.1/12360 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffffffff8c60a058 (tasklist_lock){.+.+}-{2:2}, at: send_sigurg+0xc8/0x380 fs/fcntl.c:851

and this task is already holding:
ffff888076fba638 (&f->f_owner.lock){...-}-{2:2}, at: send_sigurg+0x25/0x380 fs/fcntl.c:835
which would create a new lock dependency:
 (&f->f_owner.lock){...-}-{2:2} -> (tasklist_lock){.+.+}-{2:2}

but this new dependency connects a SOFTIRQ-irq-safe lock:
 (&client->buffer_lock){..-.}-{2:2}

... which became SOFTIRQ-irq-safe at:
  lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
  __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
  _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
  spin_lock include/linux/spinlock.h:363 [inline]
  evdev_pass_values+0xe7/0xb60 drivers/input/evdev.c:261
  evdev_events+0x198/0x2c0 drivers/input/evdev.c:306
  input_to_handler drivers/input/input.c:126 [inline]
  input_pass_values+0x873/0x1200 drivers/input/input.c:156
  input_handle_event+0xd3d/0x1600 drivers/input/input.c:426
  input_event+0x9d/0xd0 drivers/input/input.c:457
  hidinput_hid_event+0x1137/0x18e0 drivers/hid/hid-input.c:1467
  hid_process_event+0x433/0x580 drivers/hid/hid-core.c:1532
  hid_input_field drivers/hid/hid-core.c:1590 [inline]
  hid_report_raw_event+0x10d0/0x1640 drivers/hid/hid-core.c:1800
  hid_input_report+0x419/0x4d0 drivers/hid/hid-core.c:1867
  hid_irq_in+0x45c/0x690 drivers/hid/usbhid/hid-core.c:284
  __usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1674
  dummy_timer+0x8ad/0x3200 drivers/usb/gadget/udc/dummy_hcd.c:1987
  call_timer_fn+0x16d/0x560 kernel/time/timer.c:1421
  expire_timers kernel/time/timer.c:1466 [inline]
  __run_timers+0x67c/0x890 kernel/time/timer.c:1737
  run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1750
  __do_softirq+0x3b3/0x93a kernel/softirq.c:558
  invoke_softirq kernel/softirq.c:432 [inline]
  __irq_exit_rcu+0x155/0x240 kernel/softirq.c:637
  irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
  sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
  asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
  native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
  arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
  acpi_safe_halt drivers/acpi/processor_idle.c:109 [inline]
  acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:570
  acpi_idle_enter+0x352/0x4f0 drivers/acpi/processor_idle.c:705
  cpuidle_enter_state+0x521/0xef0 drivers/cpuidle/cpuidle.c:237
  cpuidle_enter+0x59/0x90 drivers/cpuidle/cpuidle.c:351
  call_cpuidle kernel/sched/idle.c:158 [inline]
  cpuidle_idle_call kernel/sched/idle.c:239 [inline]
  do_idle+0x3e4/0x670 kernel/sched/idle.c:306
  cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:403
  start_kernel+0x48c/0x535 init/main.c:1133
  secondary_startup_64_no_verify+0xb1/0xbb

to a SOFTIRQ-irq-unsafe lock:
 (tasklist_lock){.+.+}-{2:2}

... which became SOFTIRQ-irq-unsafe at:
...
  lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
  __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
  _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
  do_wait+0x2a7/0xaf0 kernel/exit.c:1576
  kernel_wait+0xe5/0x230 kernel/exit.c:1766
  call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
  call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166
  process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
  worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
  kthread+0x3f6/0x4f0 kernel/kthread.c:319
  ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

other info that might help us debug this:

Chain exists of:
  &client->buffer_lock --> &f->f_owner.lock --> tasklist_lock

 Possible interrupt unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(tasklist_lock);
                               local_irq_disable();
                               lock(&client->buffer_lock);
                               lock(&f->f_owner.lock);
  <Interrupt>
    lock(&client->buffer_lock);

 *** DEADLOCK ***

2 locks held by syz-executor.1/12360:
 #0: ffff88807cf3de88 (&u->lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:363 [inline]
 #0: ffff88807cf3de88 (&u->lock){+.+.}-{2:2}, at: queue_oob+0x404/0x8d0 net/unix/af_unix.c:1998
 #1: ffff888076fba638 (&f->f_owner.lock){...-}-{2:2}, at: send_sigurg+0x25/0x380 fs/fcntl.c:835

the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
  -> (&client->buffer_lock){..-.}-{2:2} {
     IN-SOFTIRQ-W at:
                        lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
                        __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
                        _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
                        spin_lock include/linux/spinlock.h:363 [inline]
                        evdev_pass_values+0xe7/0xb60 drivers/input/evdev.c:261
                        evdev_events+0x198/0x2c0 drivers/input/evdev.c:306
                        input_to_handler drivers/input/input.c:126 [inline]
                        input_pass_values+0x873/0x1200 drivers/input/input.c:156
                        input_handle_event+0xd3d/0x1600 drivers/input/input.c:426
                        input_event+0x9d/0xd0 drivers/input/input.c:457
                        hidinput_hid_event+0x1137/0x18e0 drivers/hid/hid-input.c:1467
                        hid_process_event+0x433/0x580 drivers/hid/hid-core.c:1532
                        hid_input_field drivers/hid/hid-core.c:1590 [inline]
                        hid_report_raw_event+0x10d0/0x1640 drivers/hid/hid-core.c:1800
                        hid_input_report+0x419/0x4d0 drivers/hid/hid-core.c:1867
                        hid_irq_in+0x45c/0x690 drivers/hid/usbhid/hid-core.c:284
                        __usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1674
                        dummy_timer+0x8ad/0x3200 drivers/usb/gadget/udc/dummy_hcd.c:1987
                        call_timer_fn+0x16d/0x560 kernel/time/timer.c:1421
                        expire_timers kernel/time/timer.c:1466 [inline]
                        __run_timers+0x67c/0x890 kernel/time/timer.c:1737
                        run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1750
                        __do_softirq+0x3b3/0x93a kernel/softirq.c:558
                        invoke_softirq kernel/softirq.c:432 [inline]
                        __irq_exit_rcu+0x155/0x240 kernel/softirq.c:637
                        irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
                        sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
                        asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
                        native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
                        arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
                        acpi_safe_halt drivers/acpi/processor_idle.c:109 [inline]
                        acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:570
                        acpi_idle_enter+0x352/0x4f0 drivers/acpi/processor_idle.c:705
                        cpuidle_enter_state+0x521/0xef0 drivers/cpuidle/cpuidle.c:237
                        cpuidle_enter+0x59/0x90 drivers/cpuidle/cpuidle.c:351
                        call_cpuidle kernel/sched/idle.c:158 [inline]
                        cpuidle_idle_call kernel/sched/idle.c:239 [inline]
                        do_idle+0x3e4/0x670 kernel/sched/idle.c:306
                        cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:403
                        start_kernel+0x48c/0x535 init/main.c:1133
                        secondary_startup_64_no_verify+0xb1/0xbb
     INITIAL USE at:
                       lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
                       __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
                       _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
                       spin_lock include/linux/spinlock.h:363 [inline]
                       evdev_pass_values+0xe7/0xb60 drivers/input/evdev.c:261
                       evdev_events+0x198/0x2c0 drivers/input/evdev.c:306
                       input_to_handler drivers/input/input.c:126 [inline]
                       input_pass_values+0x873/0x1200 drivers/input/input.c:156
                       input_handle_event+0xd3d/0x1600 drivers/input/input.c:426
                       input_event+0x9d/0xd0 drivers/input/input.c:457
                       hidinput_hid_event+0x1137/0x18e0 drivers/hid/hid-input.c:1467
                       hid_process_event+0x433/0x580 drivers/hid/hid-core.c:1532
                       hid_input_field drivers/hid/hid-core.c:1590 [inline]
                       hid_report_raw_event+0x10d0/0x1640 drivers/hid/hid-core.c:1800
                       hid_input_report+0x419/0x4d0 drivers/hid/hid-core.c:1867
                       hid_irq_in+0x45c/0x690 drivers/hid/usbhid/hid-core.c:284
                       __usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1674
                       dummy_timer+0x8ad/0x3200 drivers/usb/gadget/udc/dummy_hcd.c:1987
                       call_timer_fn+0x16d/0x560 kernel/time/timer.c:1421
                       expire_timers kernel/time/timer.c:1466 [inline]
                       __run_timers+0x67c/0x890 kernel/time/timer.c:1737
                       run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1750
                       __do_softirq+0x3b3/0x93a kernel/softirq.c:558
                       invoke_softirq kernel/softirq.c:432 [inline]
                       __irq_exit_rcu+0x155/0x240 kernel/softirq.c:637
                       irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
                       sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
                       asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
                       native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
                       arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
                       acpi_safe_halt drivers/acpi/processor_idle.c:109 [inline]
                       acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:570
                       acpi_idle_enter+0x352/0x4f0 drivers/acpi/processor_idle.c:705
                       cpuidle_enter_state+0x521/0xef0 drivers/cpuidle/cpuidle.c:237
                       cpuidle_enter+0x59/0x90 drivers/cpuidle/cpuidle.c:351
                       call_cpuidle kernel/sched/idle.c:158 [inline]
                       cpuidle_idle_call kernel/sched/idle.c:239 [inline]
                       do_idle+0x3e4/0x670 kernel/sched/idle.c:306
                       cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:403
                       start_kernel+0x48c/0x535 init/main.c:1133
                       secondary_startup_64_no_verify+0xb1/0xbb
   }
   ... key      at: [<ffffffff917297c0>] evdev_open.__key.23+0x0/0x20
 -> (&new->fa_lock){...-}-{2:2} {
    IN-SOFTIRQ-R at:
                      lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
                      __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
                      _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
                      kill_fasync_rcu fs/fcntl.c:1014 [inline]
                      kill_fasync+0x16a/0x490 fs/fcntl.c:1035
                      sock_wake_async+0x145/0x170
                      sk_wake_async+0x15d/0x250 include/net/sock.h:2440
                      sock_def_readable+0x181/0x240 net/core/sock.c:3075
                      tcp_rcv_established+0x13c0/0x1e20 net/ipv4/tcp_input.c:5953
                      tcp_v6_do_rcv+0x4f2/0x10f0 net/ipv6/tcp_ipv6.c:1526
                      tcp_v6_rcv+0x2220/0x27b0 net/ipv6/tcp_ipv6.c:1767
                      ip6_protocol_deliver_rcu+0x93d/0x12d0 net/ipv6/ip6_input.c:425
                      ip6_input_finish+0xa2/0x130 net/ipv6/ip6_input.c:466
                      NF_HOOK+0x364/0x410 include/linux/netfilter.h:302
                      NF_HOOK+0x364/0x410 include/linux/netfilter.h:302
                      __netif_receive_skb_one_core net/core/dev.c:5482 [inline]
                      __netif_receive_skb+0x1c6/0x530 net/core/dev.c:5596
                      process_backlog+0x363/0x7f0 net/core/dev.c:6473
                      __napi_poll+0xc7/0x440 net/core/dev.c:7032
                      napi_poll net/core/dev.c:7099 [inline]
                      net_rx_action+0x617/0xda0 net/core/dev.c:7186
                      __do_softirq+0x3b3/0x93a kernel/softirq.c:558
                      run_ksoftirqd+0xc1/0x120 kernel/softirq.c:921
                      smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164
                      kthread+0x3f6/0x4f0 kernel/kthread.c:319
                      ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
    INITIAL USE at:
                     lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
                     __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline]
                     _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:316
                     fasync_remove_entry+0xfb/0x1d0 fs/fcntl.c:891
                     sock_fasync+0x86/0xf0 net/socket.c:1359
                     __fput+0x715/0x890 fs/file_table.c:277
                     task_work_run+0x129/0x1a0 kernel/task_work.c:164
                     tracehook_notify_resume include/linux/tracehook.h:189 [inline]
                     exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175
                     exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
                     __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
                     syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301
                     do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
                     entry_SYSCALL_64_after_hwframe+0x61/0xcb
    INITIAL READ USE at:
                          lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
                          __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
                          _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
                          kill_fasync_rcu fs/fcntl.c:1014 [inline]
                          kill_fasync+0x16a/0x490 fs/fcntl.c:1035
                          sock_wake_async+0x145/0x170
                          sk_wake_async+0x15d/0x250 include/net/sock.h:2440
                          tcp_rcv_state_process+0x2069/0x44b0 net/ipv4/tcp_input.c:6523
                          tcp_v6_do_rcv+0x867/0x10f0 net/ipv6/tcp_ipv6.c:1551
                          sk_backlog_rcv include/net/sock.h:1059 [inline]
                          __release_sock+0x198/0x4b0 net/core/sock.c:2705
                          release_sock+0x5d/0x1c0 net/core/sock.c:3246
                          inet_wait_for_connect net/ipv4/af_inet.c:598 [inline]
                          __inet_stream_connect+0x6fc/0xe50 net/ipv4/af_inet.c:691
                          tcp_sendmsg_fastopen+0x39d/0x600 net/ipv4/tcp.c:1191
                          tcp_sendmsg_locked+0x3453/0x3ab0 net/ipv4/tcp.c:1233
                          tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1462
                          sock_sendmsg_nosec net/socket.c:704 [inline]
                          __sock_sendmsg net/socket.c:716 [inline]
                          __sys_sendto+0x564/0x720 net/socket.c:2056
                          __do_sys_sendto net/socket.c:2068 [inline]
                          __se_sys_sendto net/socket.c:2064 [inline]
                          __x64_sys_sendto+0xda/0xf0 net/socket.c:2064
                          do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                          do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
                          entry_SYSCALL_64_after_hwframe+0x61/0xcb
  }
  ... key      at: [<ffffffff9142cd40>] fasync_insert_entry.__key+0x0/0x20
  ... acquired at:
   lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
   __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
   _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
   kill_fasync_rcu fs/fcntl.c:1014 [inline]
   kill_fasync+0x16a/0x490 fs/fcntl.c:1035
   __pass_event drivers/input/evdev.c:240 [inline]
   evdev_pass_values+0x5ad/0xb60 drivers/input/evdev.c:278
   evdev_events+0x198/0x2c0 drivers/input/evdev.c:306
   input_to_handler drivers/input/input.c:126 [inline]
   input_pass_values+0x873/0x1200 drivers/input/input.c:156
   input_handle_event+0xc9b/0x1600 drivers/input/input.c:415
   input_inject_event+0x1fc/0x300 drivers/input/input.c:487
   evdev_write+0x668/0x7c0 drivers/input/evdev.c:530
   vfs_write+0x30c/0xe50 fs/read_write.c:592
   ksys_write+0x1a2/0x2c0 fs/read_write.c:647
   do_syscall_x64 arch/x86/entry/common.c:50 [inline]
   do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
   entry_SYSCALL_64_after_hwframe+0x61/0xcb

-> (&f->f_owner.lock){...-}-{2:2} {
   IN-SOFTIRQ-R at:
                    lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
                    __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
                    _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
                    send_sigio+0x2f/0x330 fs/fcntl.c:796
                    kill_fasync_rcu fs/fcntl.c:1021 [inline]
                    kill_fasync+0x20c/0x490 fs/fcntl.c:1035
                    sock_wake_async+0x145/0x170
                    sk_wake_async+0x15d/0x250 include/net/sock.h:2440
                    sock_def_readable+0x181/0x240 net/core/sock.c:3075
                    tcp_rcv_established+0x13c0/0x1e20 net/ipv4/tcp_input.c:5953
                    tcp_v6_do_rcv+0x4f2/0x10f0 net/ipv6/tcp_ipv6.c:1526
                    tcp_v6_rcv+0x2220/0x27b0 net/ipv6/tcp_ipv6.c:1767
                    ip6_protocol_deliver_rcu+0x93d/0x12d0 net/ipv6/ip6_input.c:425
                    ip6_input_finish+0xa2/0x130 net/ipv6/ip6_input.c:466
                    NF_HOOK+0x364/0x410 include/linux/netfilter.h:302
                    NF_HOOK+0x364/0x410 include/linux/netfilter.h:302
                    __netif_receive_skb_one_core net/core/dev.c:5482 [inline]
                    __netif_receive_skb+0x1c6/0x530 net/core/dev.c:5596
                    process_backlog+0x363/0x7f0 net/core/dev.c:6473
                    __napi_poll+0xc7/0x440 net/core/dev.c:7032
                    napi_poll net/core/dev.c:7099 [inline]
                    net_rx_action+0x617/0xda0 net/core/dev.c:7186
                    __do_softirq+0x3b3/0x93a kernel/softirq.c:558
                    run_ksoftirqd+0xc1/0x120 kernel/softirq.c:921
                    smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164
                    kthread+0x3f6/0x4f0 kernel/kthread.c:319
                    ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
   INITIAL USE at:
                   lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
                   __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline]
                   _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:316
                   f_modown+0x38/0x340 fs/fcntl.c:91
                   __f_setown fs/fcntl.c:110 [inline]
                   f_setown+0x127/0x1d0 fs/fcntl.c:138
                   do_fcntl+0x1b7/0x1600 fs/fcntl.c:393
                   __do_sys_fcntl fs/fcntl.c:472 [inline]
                   __se_sys_fcntl+0xd8/0x1b0 fs/fcntl.c:457
                   do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                   do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
                   entry_SYSCALL_64_after_hwframe+0x61/0xcb
   INITIAL READ USE at:
                        lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
                        __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
                        _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
                        send_sigio+0x2f/0x330 fs/fcntl.c:796
                        kill_fasync_rcu fs/fcntl.c:1021 [inline]
                        kill_fasync+0x20c/0x490 fs/fcntl.c:1035
                        sock_wake_async+0x145/0x170
                        sk_wake_async+0x15d/0x250 include/net/sock.h:2440
                        tcp_rcv_state_process+0x2069/0x44b0 net/ipv4/tcp_input.c:6523
                        tcp_v6_do_rcv+0x867/0x10f0 net/ipv6/tcp_ipv6.c:1551
                        sk_backlog_rcv include/net/sock.h:1059 [inline]
                        __release_sock+0x198/0x4b0 net/core/sock.c:2705
                        release_sock+0x5d/0x1c0 net/core/sock.c:3246
                        inet_wait_for_connect net/ipv4/af_inet.c:598 [inline]
                        __inet_stream_connect+0x6fc/0xe50 net/ipv4/af_inet.c:691
                        tcp_sendmsg_fastopen+0x39d/0x600 net/ipv4/tcp.c:1191
                        tcp_sendmsg_locked+0x3453/0x3ab0 net/ipv4/tcp.c:1233
                        tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1462
                        sock_sendmsg_nosec net/socket.c:704 [inline]
                        __sock_sendmsg net/socket.c:716 [inline]
                        __sys_sendto+0x564/0x720 net/socket.c:2056
                        __do_sys_sendto net/socket.c:2068 [inline]
                        __se_sys_sendto net/socket.c:2064 [inline]
                        __x64_sys_sendto+0xda/0xf0 net/socket.c:2064
                        do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                        do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
                        entry_SYSCALL_64_after_hwframe+0x61/0xcb
 }
 ... key      at: [<ffffffff9142c0c0>] __alloc_file.__key+0x0/0x10
 ... acquired at:
   lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
   __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
   _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
   send_sigio+0x2f/0x330 fs/fcntl.c:796
   kill_fasync_rcu fs/fcntl.c:1021 [inline]
   kill_fasync+0x20c/0x490 fs/fcntl.c:1035
   sock_wake_async+0x145/0x170
   sk_wake_async+0x15d/0x250 include/net/sock.h:2440
   tcp_rcv_state_process+0x2069/0x44b0 net/ipv4/tcp_input.c:6523
   tcp_v6_do_rcv+0x867/0x10f0 net/ipv6/tcp_ipv6.c:1551
   sk_backlog_rcv include/net/sock.h:1059 [inline]
   __release_sock+0x198/0x4b0 net/core/sock.c:2705
   release_sock+0x5d/0x1c0 net/core/sock.c:3246
   inet_wait_for_connect net/ipv4/af_inet.c:598 [inline]
   __inet_stream_connect+0x6fc/0xe50 net/ipv4/af_inet.c:691
   tcp_sendmsg_fastopen+0x39d/0x600 net/ipv4/tcp.c:1191
   tcp_sendmsg_locked+0x3453/0x3ab0 net/ipv4/tcp.c:1233
   tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1462
   sock_sendmsg_nosec net/socket.c:704 [inline]
   __sock_sendmsg net/socket.c:716 [inline]
   __sys_sendto+0x564/0x720 net/socket.c:2056
   __do_sys_sendto net/socket.c:2068 [inline]
   __se_sys_sendto net/socket.c:2064 [inline]
   __x64_sys_sendto+0xda/0xf0 net/socket.c:2064
   do_syscall_x64 arch/x86/entry/common.c:50 [inline]
   do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
   entry_SYSCALL_64_after_hwframe+0x61/0xcb


the dependencies between the lock to be acquired
 and SOFTIRQ-irq-unsafe lock:
-> (tasklist_lock){.+.+}-{2:2} {
   HARDIRQ-ON-R at:
                    lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
                    __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                    _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
                    do_wait+0x2a7/0xaf0 kernel/exit.c:1576
                    kernel_wait+0xe5/0x230 kernel/exit.c:1766
                    call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
                    call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166
                    process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
                    worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
                    kthread+0x3f6/0x4f0 kernel/kthread.c:319
                    ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
   SOFTIRQ-ON-R at:
                    lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
                    __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                    _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
                    do_wait+0x2a7/0xaf0 kernel/exit.c:1576
                    kernel_wait+0xe5/0x230 kernel/exit.c:1766
                    call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
                    call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166
                    process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
                    worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
                    kthread+0x3f6/0x4f0 kernel/kthread.c:319
                    ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
   INITIAL USE at:
                   lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
                   __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline]
                   _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:316
                   copy_process+0x22be/0x3ef0 kernel/fork.c:2337
                   kernel_clone+0x210/0x960 kernel/fork.c:2604
                   kernel_thread+0x168/0x1e0 kernel/fork.c:2656
                   rest_init+0x21/0x330 init/main.c:699
                   start_kernel+0x48c/0x535 init/main.c:1133
                   secondary_startup_64_no_verify+0xb1/0xbb
   INITIAL READ USE at:
                        lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
                        __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                        _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
                        do_wait+0x2a7/0xaf0 kernel/exit.c:1576
                        kernel_wait+0xe5/0x230 kernel/exit.c:1766
                        call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
                        call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166
                        process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
                        worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
                        kthread+0x3f6/0x4f0 kernel/kthread.c:319
                        ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 }
 ... key      at: [<ffffffff8c60a058>] tasklist_lock+0x18/0x40
 ... acquired at:
   lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
   __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
   _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
   send_sigurg+0xc8/0x380 fs/fcntl.c:851
   sk_send_sigurg+0x6a/0xb0 net/core/sock.c:3109
   queue_oob+0x618/0x8d0 net/unix/af_unix.c:2017
   unix_stream_sendmsg+0xe0a/0x1070 net/unix/af_unix.c:2117
   sock_sendmsg_nosec net/socket.c:704 [inline]
   __sock_sendmsg net/socket.c:716 [inline]
   ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2429
   ___sys_sendmsg+0x252/0x2e0 net/socket.c:2483
   __sys_sendmmsg+0x2bf/0x560 net/socket.c:2569
   __do_sys_sendmmsg net/socket.c:2598 [inline]
   __se_sys_sendmmsg net/socket.c:2595 [inline]
   __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2595
   do_syscall_x64 arch/x86/entry/common.c:50 [inline]
   do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
   entry_SYSCALL_64_after_hwframe+0x61/0xcb


stack backtrace:
CPU: 1 PID: 12360 Comm: syz-executor.1 Not tainted 5.15.137-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_bad_irq_dependency kernel/locking/lockdep.c:2567 [inline]
 check_irq_usage kernel/locking/lockdep.c:2806 [inline]
 check_prev_add kernel/locking/lockdep.c:3057 [inline]
 check_prevs_add kernel/locking/lockdep.c:3172 [inline]
 validate_chain+0x4cfe/0x58b0 kernel/locking/lockdep.c:3787
 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011
 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
 _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
 send_sigurg+0xc8/0x380 fs/fcntl.c:851
 sk_send_sigurg+0x6a/0xb0 net/core/sock.c:3109
 queue_oob+0x618/0x8d0 net/unix/af_unix.c:2017
 unix_stream_sendmsg+0xe0a/0x1070 net/unix/af_unix.c:2117
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2429
 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2483
 __sys_sendmmsg+0x2bf/0x560 net/socket.c:2569
 __do_sys_sendmmsg net/socket.c:2598 [inline]
 __se_sys_sendmmsg net/socket.c:2595 [inline]
 __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2595
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7ff3de107ae9
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:00007ff3dc6890c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007ff3de226f80 RCX: 00007ff3de107ae9
RDX: 0000000000000001 RSI: 0000000020003cc0 RDI: 0000000000000003
RBP: 00007ff3de15347a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000081 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007ff3de226f80 R15: 00007ffdb1fb81b8
 </TASK>