syzbot

=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
6.1.89-syzkaller #0 Not tainted
-----------------------------------------------------
syz-executor.0/15200 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffffffff8ce0a058 (tasklist_lock){.+.+}-{2:2}, at: send_sigio+0xf8/0x360 fs/fcntl.c:790

and this task is already holding:
ffff888028f36db0 (&f->f_owner.lock){...-}-{2:2}, at: send_sigio+0x2f/0x360 fs/fcntl.c:776
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+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
  __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
  _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
  spin_lock include/linux/spinlock.h:351 [inline]
  evdev_pass_values+0xee/0xad0 drivers/input/evdev.c:261
  evdev_events+0x1be/0x2f0 drivers/input/evdev.c:306
  input_to_handler drivers/input/input.c:127 [inline]
  input_pass_values+0x8e0/0x12a0 drivers/input/input.c:159
  input_event_dispose+0x3fc/0x650 drivers/input/input.c:385
  input_handle_event+0x97d/0xb00 drivers/input/input.c:402
  input_event+0xa0/0xd0 drivers/input/input.c:431
  hidinput_hid_event+0x137f/0x1d30 drivers/hid/hid-input.c:1704
  hid_process_event+0x433/0x580 drivers/hid/hid-core.c:1544
  hid_process_report drivers/hid/hid-core.c:1692 [inline]
  hid_report_raw_event+0xfd5/0x17e0 drivers/hid/hid-core.c:2019
  hid_input_report+0x420/0x4e0 drivers/hid/hid-core.c:2087
  hid_irq_in+0x45c/0x690 drivers/hid/usbhid/hid-core.c:284
  __usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1675
  dummy_timer+0x8ad/0x3200 drivers/usb/gadget/udc/dummy_hcd.c:1988
  call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
  expire_timers kernel/time/timer.c:1549 [inline]
  __run_timers+0x67c/0x890 kernel/time/timer.c:1820
  run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
  __do_softirq+0x2e9/0xa4c kernel/softirq.c:571
  invoke_softirq kernel/softirq.c:445 [inline]
  __irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
  irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
  sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
  asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
  console_emit_next_record+0xd67/0x1000 kernel/printk/printk.c:2786
  console_unlock+0x278/0x7c0 kernel/printk/printk.c:2906
  vprintk_emit+0x523/0x740 kernel/printk/printk.c:2303
  _printk+0xd1/0x111 kernel/printk/printk.c:2328
  set_capacity_and_notify+0x2b0/0x340 block/genhd.c:91
  loop_set_size+0x44/0xa0 drivers/block/loop.c:235
  loop_configure+0xd1d/0x1270 drivers/block/loop.c:1098
  lo_ioctl+0x882/0x2010
  blkdev_ioctl+0x3a9/0x760 block/ioctl.c:618
  vfs_ioctl fs/ioctl.c:51 [inline]
  __do_sys_ioctl fs/ioctl.c:870 [inline]
  __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856
  do_syscall_x64 arch/x86/entry/common.c:51 [inline]
  do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
  entry_SYSCALL_64_after_hwframe+0x68/0xd2

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

... which became SOFTIRQ-irq-unsafe at:
...
  lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
  __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
  _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
  do_wait+0x2c6/0xb80 kernel/exit.c:1602
  kernel_wait+0xe5/0x230 kernel/exit.c:1792
  call_usermodehelper_exec_sync kernel/umh.c:140 [inline]
  call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:167
  process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
  worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
  kthread+0x28d/0x320 kernel/kthread.c:376
  ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

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 ***

6 locks held by syz-executor.0/15200:
 #0: ffff88814b7b8460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393
 #1: ffffffff8d267270 (file_rwsem){.+.+}-{0:0}, at: __break_lease+0x186/0x1550 fs/locks.c:1492
 #2: ffff88801ef39438 (&ctx->flc_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
 #2: ffff88801ef39438 (&ctx->flc_lock){+.+.}-{2:2}, at: __break_lease+0x193/0x1550 fs/locks.c:1493
 #3: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 #3: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
 #3: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x51/0x4d0 fs/fcntl.c:1014
 #4: ffff8880643fb210 (&new->fa_lock){...-}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:994 [inline]
 #4: ffff8880643fb210 (&new->fa_lock){...-}-{2:2}, at: kill_fasync+0x196/0x4d0 fs/fcntl.c:1015
 #5: ffff888028f36db0 (&f->f_owner.lock){...-}-{2:2}, at: send_sigio+0x2f/0x360 fs/fcntl.c:776

the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
  -> (&client->buffer_lock){..-.}-{2:2} {
     IN-SOFTIRQ-W at:
                        lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
                        __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
                        _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
                        spin_lock include/linux/spinlock.h:351 [inline]
                        evdev_pass_values+0xee/0xad0 drivers/input/evdev.c:261
                        evdev_events+0x1be/0x2f0 drivers/input/evdev.c:306
                        input_to_handler drivers/input/input.c:127 [inline]
                        input_pass_values+0x8e0/0x12a0 drivers/input/input.c:159
                        input_event_dispose+0x3fc/0x650 drivers/input/input.c:385
                        input_handle_event+0x97d/0xb00 drivers/input/input.c:402
                        input_event+0xa0/0xd0 drivers/input/input.c:431
                        hidinput_hid_event+0x137f/0x1d30 drivers/hid/hid-input.c:1704
                        hid_process_event+0x433/0x580 drivers/hid/hid-core.c:1544
                        hid_process_report drivers/hid/hid-core.c:1692 [inline]
                        hid_report_raw_event+0xfd5/0x17e0 drivers/hid/hid-core.c:2019
                        hid_input_report+0x420/0x4e0 drivers/hid/hid-core.c:2087
                        hid_irq_in+0x45c/0x690 drivers/hid/usbhid/hid-core.c:284
                        __usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1675
                        dummy_timer+0x8ad/0x3200 drivers/usb/gadget/udc/dummy_hcd.c:1988
                        call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
                        expire_timers kernel/time/timer.c:1549 [inline]
                        __run_timers+0x67c/0x890 kernel/time/timer.c:1820
                        run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
                        __do_softirq+0x2e9/0xa4c kernel/softirq.c:571
                        invoke_softirq kernel/softirq.c:445 [inline]
                        __irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
                        irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
                        sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
                        asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
                        console_emit_next_record+0xd67/0x1000 kernel/printk/printk.c:2786
                        console_unlock+0x278/0x7c0 kernel/printk/printk.c:2906
                        vprintk_emit+0x523/0x740 kernel/printk/printk.c:2303
                        _printk+0xd1/0x111 kernel/printk/printk.c:2328
                        set_capacity_and_notify+0x2b0/0x340 block/genhd.c:91
                        loop_set_size+0x44/0xa0 drivers/block/loop.c:235
                        loop_configure+0xd1d/0x1270 drivers/block/loop.c:1098
                        lo_ioctl+0x882/0x2010
                        blkdev_ioctl+0x3a9/0x760 block/ioctl.c:618
                        vfs_ioctl fs/ioctl.c:51 [inline]
                        __do_sys_ioctl fs/ioctl.c:870 [inline]
                        __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856
                        do_syscall_x64 arch/x86/entry/common.c:51 [inline]
                        do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
                        entry_SYSCALL_64_after_hwframe+0x68/0xd2
     INITIAL USE at:
                       lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
                       __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
                       _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
                       spin_lock include/linux/spinlock.h:351 [inline]
                       evdev_pass_values+0xee/0xad0 drivers/input/evdev.c:261
                       evdev_events+0x1be/0x2f0 drivers/input/evdev.c:306
                       input_to_handler drivers/input/input.c:127 [inline]
                       input_pass_values+0x8e0/0x12a0 drivers/input/input.c:159
                       input_event_dispose+0x366/0x650 drivers/input/input.c:374
                       input_handle_event+0x97d/0xb00 drivers/input/input.c:402
                       input_inject_event+0x224/0x330 drivers/input/input.c:461
                       evdev_write+0x668/0x7c0 drivers/input/evdev.c:530
                       vfs_write+0x2d9/0xba0 fs/read_write.c:582
                       ksys_write+0x19c/0x2c0 fs/read_write.c:637
                       do_syscall_x64 arch/x86/entry/common.c:51 [inline]
                       do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
                       entry_SYSCALL_64_after_hwframe+0x68/0xd2
   }
   ... key      at: [<ffffffff92056660>] evdev_open.__key.25+0x0/0x20
 -> (&new->fa_lock){...-}-{2:2} {
    IN-SOFTIRQ-R at:
                      lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
                      __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
                      _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
                      kill_fasync_rcu fs/fcntl.c:994 [inline]
                      kill_fasync+0x196/0x4d0 fs/fcntl.c:1015
                      sock_wake_async+0x145/0x170
                      sk_wake_async+0x186/0x280 include/net/sock.h:2588
                      sock_def_readable+0x1a7/0x280 net/core/sock.c:3306
                      tcp_data_queue+0x21c5/0x6fd0 net/ipv4/tcp_input.c:5102
                      tcp_rcv_state_process+0x2682/0x4510 net/ipv4/tcp_input.c:6704
                      tcp_v6_do_rcv+0x91c/0x1270 net/ipv6/tcp_ipv6.c:1514
                      tcp_v6_rcv+0x234e/0x2b60 net/ipv6/tcp_ipv6.c:1753
                      ip6_protocol_deliver_rcu+0xb1a/0x1340 net/ipv6/ip6_input.c:438
                      ip6_input_finish+0x183/0x2c0 net/ipv6/ip6_input.c:483
                      NF_HOOK+0x39d/0x450 include/linux/netfilter.h:302
                      NF_HOOK+0x39d/0x450 include/linux/netfilter.h:302
                      __netif_receive_skb_one_core net/core/dev.c:5528 [inline]
                      __netif_receive_skb+0x1c6/0x530 net/core/dev.c:5642
                      process_backlog+0x381/0x760 net/core/dev.c:5970
                      __napi_poll+0xc7/0x470 net/core/dev.c:6537
                      napi_poll net/core/dev.c:6604 [inline]
                      net_rx_action+0x70f/0xeb0 net/core/dev.c:6718
                      __do_softirq+0x2e9/0xa4c kernel/softirq.c:571
                      run_ksoftirqd+0xc1/0x120 kernel/softirq.c:934
                      smpboot_thread_fn+0x52c/0xa30 kernel/smpboot.c:164
                      kthread+0x28d/0x320 kernel/kthread.c:376
                      ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
    INITIAL USE at:
                     lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
                     __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
                     _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:326
                     fasync_remove_entry+0xfb/0x1d0 fs/fcntl.c:871
                     sock_fasync+0x86/0xf0 net/socket.c:1425
                     __fput+0x70d/0x890 fs/file_table.c:317
                     task_work_run+0x246/0x300 kernel/task_work.c:179
                     get_signal+0x15fc/0x17d0 kernel/signal.c:2639
                     arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
                     exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
                     exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
                     __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
                     syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
                     do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
                     entry_SYSCALL_64_after_hwframe+0x68/0xd2
    INITIAL READ USE at:
                          lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
                          __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
                          _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
                          kill_fasync_rcu fs/fcntl.c:994 [inline]
                          kill_fasync+0x196/0x4d0 fs/fcntl.c:1015
                          sock_wake_async+0x145/0x170
                          sk_wake_async+0x186/0x280 include/net/sock.h:2588
                          tcp_rcv_state_process+0x20c1/0x4510 net/ipv4/tcp_input.c:6583
                          tcp_v6_do_rcv+0x91c/0x1270 net/ipv6/tcp_ipv6.c:1514
                          sk_backlog_rcv include/net/sock.h:1117 [inline]
                          __release_sock+0x198/0x4b0 net/core/sock.c:2935
                          release_sock+0x5d/0x1c0 net/core/sock.c:3499
                          tcp_sendmsg+0x36/0x40 net/ipv4/tcp.c:1490
                          sock_sendmsg_nosec net/socket.c:718 [inline]
                          __sock_sendmsg net/socket.c:730 [inline]
                          __sys_sendto+0x480/0x600 net/socket.c:2148
                          __do_sys_sendto net/socket.c:2160 [inline]
                          __se_sys_sendto net/socket.c:2156 [inline]
                          __x64_sys_sendto+0xda/0xf0 net/socket.c:2156
                          do_syscall_x64 arch/x86/entry/common.c:51 [inline]
                          do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
                          entry_SYSCALL_64_after_hwframe+0x68/0xd2
  }
  ... key      at: [<ffffffff91d5d8e0>] fasync_insert_entry.__key+0x0/0x20
  ... acquired at:
   lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
   __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
   _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
   kill_fasync_rcu fs/fcntl.c:994 [inline]
   kill_fasync+0x196/0x4d0 fs/fcntl.c:1015
   __pass_event drivers/input/evdev.c:240 [inline]
   evdev_pass_values+0x586/0xad0 drivers/input/evdev.c:278
   evdev_events+0x1be/0x2f0 drivers/input/evdev.c:306
   input_to_handler drivers/input/input.c:127 [inline]
   input_pass_values+0x8e0/0x12a0 drivers/input/input.c:159
   input_event_dispose+0x366/0x650 drivers/input/input.c:374
   input_handle_event+0x97d/0xb00 drivers/input/input.c:402
   input_inject_event+0x224/0x330 drivers/input/input.c:461
   evdev_write+0x668/0x7c0 drivers/input/evdev.c:530
   vfs_write+0x2d9/0xba0 fs/read_write.c:582
   ksys_write+0x19c/0x2c0 fs/read_write.c:637
   do_syscall_x64 arch/x86/entry/common.c:51 [inline]
   do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
   entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> (&f->f_owner.lock){...-}-{2:2} {
   IN-SOFTIRQ-R at:
                    lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
                    __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
                    _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
                    send_sigurg+0x25/0x3b0 fs/fcntl.c:815
                    sk_send_sigurg+0x6a/0xb0 net/core/sock.c:3362
                    tcp_check_urg+0x202/0x740 net/ipv4/tcp_input.c:5637
                    tcp_urg+0x154/0x440 net/ipv4/tcp_input.c:5678
                    tcp_rcv_state_process+0x247d/0x4510 net/ipv4/tcp_input.c:6672
                    tcp_v6_do_rcv+0x91c/0x1270 net/ipv6/tcp_ipv6.c:1514
                    tcp_v6_rcv+0x234e/0x2b60 net/ipv6/tcp_ipv6.c:1753
                    ip6_protocol_deliver_rcu+0xb1a/0x1340 net/ipv6/ip6_input.c:438
                    ip6_input_finish+0x183/0x2c0 net/ipv6/ip6_input.c:483
                    NF_HOOK+0x39d/0x450 include/linux/netfilter.h:302
                    NF_HOOK+0x39d/0x450 include/linux/netfilter.h:302
                    __netif_receive_skb_one_core net/core/dev.c:5528 [inline]
                    __netif_receive_skb+0x1c6/0x530 net/core/dev.c:5642
                    process_backlog+0x381/0x760 net/core/dev.c:5970
                    __napi_poll+0xc7/0x470 net/core/dev.c:6537
                    napi_poll net/core/dev.c:6604 [inline]
                    net_rx_action+0x70f/0xeb0 net/core/dev.c:6718
                    __do_softirq+0x2e9/0xa4c kernel/softirq.c:571
                    run_ksoftirqd+0xc1/0x120 kernel/softirq.c:934
                    smpboot_thread_fn+0x52c/0xa30 kernel/smpboot.c:164
                    kthread+0x28d/0x320 kernel/kthread.c:376
                    ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
   INITIAL USE at:
                   lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
                   __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
                   _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:326
                   f_modown+0x38/0x340 fs/fcntl.c:91
                   __f_setown fs/fcntl.c:110 [inline]
                   f_setown+0x14c/0x200 fs/fcntl.c:138
                   do_fcntl+0x128/0x1510 fs/fcntl.c:375
                   __do_sys_fcntl fs/fcntl.c:452 [inline]
                   __se_sys_fcntl+0xd5/0x1b0 fs/fcntl.c:437
                   do_syscall_x64 arch/x86/entry/common.c:51 [inline]
                   do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
                   entry_SYSCALL_64_after_hwframe+0x68/0xd2
   INITIAL READ USE at:
                        lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
                        __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
                        _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
                        send_sigurg+0x25/0x3b0 fs/fcntl.c:815
                        sk_send_sigurg+0x6a/0xb0 net/core/sock.c:3362
                        tcp_check_urg+0x202/0x740 net/ipv4/tcp_input.c:5637
                        tcp_urg+0x154/0x440 net/ipv4/tcp_input.c:5678
                        tcp_rcv_established+0xe58/0x1f00 net/ipv4/tcp_input.c:6025
                        tcp_v4_do_rcv+0x487/0xb00 net/ipv4/tcp_ipv4.c:1677
                        sk_backlog_rcv include/net/sock.h:1117 [inline]
                        __release_sock+0x198/0x4b0 net/core/sock.c:2935
                        release_sock+0x5d/0x1c0 net/core/sock.c:3499
                        sk_stream_wait_memory+0x725/0xef0 net/core/stream.c:145
                        tcp_sendmsg_locked+0x17f5/0x4100 net/ipv4/tcp.c:1451
                        tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1489
                        sock_sendmsg_nosec net/socket.c:718 [inline]
                        __sock_sendmsg net/socket.c:730 [inline]
                        __sys_sendto+0x480/0x600 net/socket.c:2148
                        __do_sys_sendto net/socket.c:2160 [inline]
                        __se_sys_sendto net/socket.c:2156 [inline]
                        __x64_sys_sendto+0xda/0xf0 net/socket.c:2156
                        do_syscall_x64 arch/x86/entry/common.c:51 [inline]
                        do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
                        entry_SYSCALL_64_after_hwframe+0x68/0xd2
 }
 ... key      at: [<ffffffff91d5cc60>] __alloc_file.__key+0x0/0x10
 ... acquired at:
   lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
   __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
   _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
   send_sigio+0x2f/0x360 fs/fcntl.c:776
   kill_fasync_rcu fs/fcntl.c:1001 [inline]
   kill_fasync+0x232/0x4d0 fs/fcntl.c:1015
   sock_wake_async+0x145/0x170
   sk_wake_async+0x186/0x280 include/net/sock.h:2588
   tcp_rcv_state_process+0x20c1/0x4510 net/ipv4/tcp_input.c:6583
   tcp_v6_do_rcv+0x91c/0x1270 net/ipv6/tcp_ipv6.c:1514
   sk_backlog_rcv include/net/sock.h:1117 [inline]
   __release_sock+0x198/0x4b0 net/core/sock.c:2935
   release_sock+0x5d/0x1c0 net/core/sock.c:3499
   tcp_sendmsg+0x36/0x40 net/ipv4/tcp.c:1490
   sock_sendmsg_nosec net/socket.c:718 [inline]
   __sock_sendmsg net/socket.c:730 [inline]
   __sys_sendto+0x480/0x600 net/socket.c:2148
   __do_sys_sendto net/socket.c:2160 [inline]
   __se_sys_sendto net/socket.c:2156 [inline]
   __x64_sys_sendto+0xda/0xf0 net/socket.c:2156
   do_syscall_x64 arch/x86/entry/common.c:51 [inline]
   do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
   entry_SYSCALL_64_after_hwframe+0x68/0xd2


the dependencies between the lock to be acquired
 and SOFTIRQ-irq-unsafe lock:
-> (tasklist_lock){.+.+}-{2:2} {
   HARDIRQ-ON-R at:
                    lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
                    __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
                    _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
                    do_wait+0x2c6/0xb80 kernel/exit.c:1602
                    kernel_wait+0xe5/0x230 kernel/exit.c:1792
                    call_usermodehelper_exec_sync kernel/umh.c:140 [inline]
                    call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:167
                    process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
                    worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
                    kthread+0x28d/0x320 kernel/kthread.c:376
                    ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
   SOFTIRQ-ON-R at:
                    lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
                    __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
                    _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
                    do_wait+0x2c6/0xb80 kernel/exit.c:1602
                    kernel_wait+0xe5/0x230 kernel/exit.c:1792
                    call_usermodehelper_exec_sync kernel/umh.c:140 [inline]
                    call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:167
                    process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
                    worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
                    kthread+0x28d/0x320 kernel/kthread.c:376
                    ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
   INITIAL USE at:
                   lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
                   __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
                   _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:326
                   copy_process+0x24b6/0x4060 kernel/fork.c:2401
                   kernel_clone+0x222/0x920 kernel/fork.c:2682
                   user_mode_thread+0x12e/0x190 kernel/fork.c:2758
                   rest_init+0x23/0x300 init/main.c:699
                   start_kernel+0x0/0x53f init/main.c:894
                   start_kernel+0x496/0x53f init/main.c:1141
                   secondary_startup_64_no_verify+0xcf/0xdb
   INITIAL READ USE at:
                        lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
                        __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
                        _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
                        do_wait+0x2c6/0xb80 kernel/exit.c:1602
                        kernel_wait+0xe5/0x230 kernel/exit.c:1792
                        call_usermodehelper_exec_sync kernel/umh.c:140 [inline]
                        call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:167
                        process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
                        worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
                        kthread+0x28d/0x320 kernel/kthread.c:376
                        ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 }
 ... key      at: [<ffffffff8ce0a058>] tasklist_lock+0x18/0x40
 ... acquired at:
   lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
   __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
   _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
   send_sigio+0xf8/0x360 fs/fcntl.c:790
   kill_fasync_rcu fs/fcntl.c:1001 [inline]
   kill_fasync+0x232/0x4d0 fs/fcntl.c:1015
   lease_break_callback+0x22/0x30 fs/locks.c:521
   __break_lease+0x4d1/0x1550 fs/locks.c:1521
   break_lease include/linux/fs.h:2714 [inline]
   do_dentry_open+0x76c/0x10f0 fs/open.c:873
   do_open fs/namei.c:3628 [inline]
   path_openat+0x2644/0x2e60 fs/namei.c:3785
   do_filp_open+0x230/0x480 fs/namei.c:3812
   do_sys_openat2+0x13b/0x500 fs/open.c:1318
   do_sys_open fs/open.c:1334 [inline]
   __do_sys_creat fs/open.c:1410 [inline]
   __se_sys_creat fs/open.c:1404 [inline]
   __x64_sys_creat+0x11f/0x160 fs/open.c:1404
   do_syscall_x64 arch/x86/entry/common.c:51 [inline]
   do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
   entry_SYSCALL_64_after_hwframe+0x68/0xd2


stack backtrace:
CPU: 1 PID: 15200 Comm: syz-executor.0 Not tainted 6.1.89-syzkaller #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+0x1e3/0x2cb lib/dump_stack.c:106
 print_bad_irq_dependency kernel/locking/lockdep.c:2604 [inline]
 check_irq_usage kernel/locking/lockdep.c:2843 [inline]
 check_prev_add kernel/locking/lockdep.c:3094 [inline]
 check_prevs_add kernel/locking/lockdep.c:3209 [inline]
 validate_chain+0x4d16/0x5950 kernel/locking/lockdep.c:3825
 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049
 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
 _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
 send_sigio+0xf8/0x360 fs/fcntl.c:790
 kill_fasync_rcu fs/fcntl.c:1001 [inline]
 kill_fasync+0x232/0x4d0 fs/fcntl.c:1015
 lease_break_callback+0x22/0x30 fs/locks.c:521
 __break_lease+0x4d1/0x1550 fs/locks.c:1521
 break_lease include/linux/fs.h:2714 [inline]
 do_dentry_open+0x76c/0x10f0 fs/open.c:873
 do_open fs/namei.c:3628 [inline]
 path_openat+0x2644/0x2e60 fs/namei.c:3785
 do_filp_open+0x230/0x480 fs/namei.c:3812
 do_sys_openat2+0x13b/0x500 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_creat fs/open.c:1410 [inline]
 __se_sys_creat fs/open.c:1404 [inline]
 __x64_sys_creat+0x11f/0x160 fs/open.c:1404
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2ab667dea9
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:00007f2ab740b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f2ab67abf80 RCX: 00007f2ab667dea9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000
RBP: 00007f2ab66ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f2ab67abf80 R15: 00007ffd6f8f9828
 </TASK>