=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
5.13.0-rc1-next-20210514-syzkaller #0 Not tainted
-----------------------------------------------------
syz-executor.5/15227 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffff88802a12d2b8 (&new->fa_lock){.+.-}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1012 [inline]
ffff88802a12d2b8 (&new->fa_lock){.+.-}-{2:2}, at: kill_fasync fs/fcntl.c:1033 [inline]
ffff88802a12d2b8 (&new->fa_lock){.+.-}-{2:2}, at: kill_fasync+0x132/0x460 fs/fcntl.c:1026

and this task is already holding:
ffff88801f95b028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:359 [inline]
ffff88801f95b028 (&client->buffer_lock){....}-{2:2}, at: evdev_pass_values.part.0+0xf6/0x970 drivers/input/evdev.c:261
which would create a new lock dependency:
 (&client->buffer_lock){....}-{2:2} -> (&new->fa_lock){.+.-}-{2:2}

but this new dependency connects a SOFTIRQ-irq-safe lock:
 (&evdev->mutex){+.+.}-{3:3}

... which became SOFTIRQ-irq-safe at:
  lock_acquire kernel/locking/lockdep.c:5512 [inline]
  lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477
  __mutex_lock_common kernel/locking/mutex.c:949 [inline]
  __mutex_lock+0x139/0x1120 kernel/locking/mutex.c:1096
  evdev_open_device drivers/input/evdev.c:393 [inline]
  evdev_open+0x2f3/0x6a0 drivers/input/evdev.c:487
  chrdev_open+0x266/0x770 fs/char_dev.c:414
  do_dentry_open+0x4b9/0x11c0 fs/open.c:826
  do_open fs/namei.c:3361 [inline]
  path_openat+0x1c09/0x27d0 fs/namei.c:3494
  do_filp_open+0x190/0x3d0 fs/namei.c:3521
  do_sys_openat2+0x16d/0x420 fs/open.c:1196
  do_sys_open fs/open.c:1212 [inline]
  __do_sys_openat fs/open.c:1228 [inline]
  __se_sys_openat fs/open.c:1223 [inline]
  __x64_sys_openat+0x13f/0x1f0 fs/open.c:1223
  do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47
  entry_SYSCALL_64_after_hwframe+0x44/0xae

to a SOFTIRQ-irq-unsafe lock:
 (&new->fa_lock){.+.-}-{2:2}

... which became SOFTIRQ-irq-unsafe at:
...
  lock_acquire kernel/locking/lockdep.c:5512 [inline]
  lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477
  __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
  _raw_read_lock+0x36/0x70 kernel/locking/spinlock.c:223
  kill_fasync_rcu fs/fcntl.c:1012 [inline]
  kill_fasync fs/fcntl.c:1033 [inline]
  kill_fasync+0x132/0x460 fs/fcntl.c:1026
  sock_wake_async+0xd2/0x160 net/socket.c:1312
  sk_wake_async include/net/sock.h:2313 [inline]
  sk_wake_async include/net/sock.h:2309 [inline]
  sock_def_readable+0x349/0x4e0 net/core/sock.c:2912
  dccp_fin net/dccp/input.c:40 [inline]
  dccp_rcv_close+0x147/0x400 net/dccp/input.c:77
  __dccp_rcv_established.constprop.0+0x1f8/0x390 net/dccp/input.c:316
  dccp_rcv_established net/dccp/input.c:376 [inline]
  dccp_rcv_established+0x112/0x160 net/dccp/input.c:364
  dccp_v6_do_rcv+0x989/0xba0 net/dccp/ipv6.c:621
  sk_backlog_rcv include/net/sock.h:1020 [inline]
  __sk_receive_skb+0x29d/0x830 net/core/sock.c:509
  dccp_v6_rcv+0xd8c/0x17e0 net/dccp/ipv6.c:790
  ip6_protocol_deliver_rcu+0x2e9/0x17f0 net/ipv6/ip6_input.c:422
  ip6_input_finish+0x62/0x170 net/ipv6/ip6_input.c:463
  NF_HOOK include/linux/netfilter.h:301 [inline]
  NF_HOOK include/linux/netfilter.h:295 [inline]
  ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:472
  dst_input include/net/dst.h:458 [inline]
  ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline]
  NF_HOOK include/linux/netfilter.h:301 [inline]
  NF_HOOK include/linux/netfilter.h:295 [inline]
  ipv6_rcv+0x28c/0x3c0 net/ipv6/ip6_input.c:297
  __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5440
  __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5554
  process_backlog+0x2a5/0x6c0 net/core/dev.c:6418
  __napi_poll+0xaf/0x440 net/core/dev.c:6973
  napi_poll net/core/dev.c:7040 [inline]
  net_rx_action+0x801/0xb40 net/core/dev.c:7127
  __do_softirq+0x29b/0x9fb kernel/softirq.c:559
  do_softirq.part.0+0xd9/0x130 kernel/softirq.c:460
  do_softirq kernel/softirq.c:452 [inline]
  __local_bh_enable_ip+0x102/0x120 kernel/softirq.c:384
  local_bh_enable include/linux/bottom_half.h:32 [inline]
  rcu_read_unlock_bh include/linux/rcupdate.h:757 [inline]
  ip6_finish_output2+0x6d4/0x1700 net/ipv6/ip6_output.c:118
  __ip6_finish_output net/ipv6/ip6_output.c:182 [inline]
  __ip6_finish_output+0x4c1/0xe10 net/ipv6/ip6_output.c:161
  ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:192
  NF_HOOK_COND include/linux/netfilter.h:290 [inline]
  ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:215
  dst_output include/net/dst.h:448 [inline]
  NF_HOOK include/linux/netfilter.h:301 [inline]
  NF_HOOK include/linux/netfilter.h:295 [inline]
  ip6_xmit+0x1277/0x1ea0 net/ipv6/ip6_output.c:320
  inet6_csk_xmit+0x333/0x630 net/ipv6/inet6_connection_sock.c:135
  dccp_transmit_skb+0x973/0x12c0 net/dccp/output.c:138
  dccp_send_close+0x1f0/0x350 net/dccp/output.c:708
  dccp_terminate_connection net/dccp/proto.c:965 [inline]
  dccp_close+0x9cc/0xe60 net/dccp/proto.c:1028
  inet_release+0x12e/0x280 net/ipv4/af_inet.c:431
  inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:478
  __sock_release+0xcd/0x280 net/socket.c:599
  sock_close+0x18/0x20 net/socket.c:1258
  __fput+0x288/0x920 fs/file_table.c:280
  task_work_run+0xdd/0x1a0 kernel/task_work.c:164
  tracehook_notify_resume include/linux/tracehook.h:189 [inline]
  exit_to_user_mode_loop kernel/entry/common.c:174 [inline]
  exit_to_user_mode_prepare+0x26f/0x280 kernel/entry/common.c:208
  __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
  syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301
  do_syscall_64+0x3e/0xb0 arch/x86/entry/common.c:57
  entry_SYSCALL_64_after_hwframe+0x44/0xae

other info that might help us debug this:

Chain exists of:
  &evdev->mutex --> &client->buffer_lock --> &new->fa_lock

 Possible interrupt unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&new->fa_lock);
                               local_irq_disable();
                               lock(&evdev->mutex);
                               lock(&client->buffer_lock);
  <Interrupt>
    lock(&evdev->mutex);

 *** DEADLOCK ***

7 locks held by syz-executor.5/15227:
 #0: ffff888146c7d110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x1d3/0x760 drivers/input/evdev.c:513
 #1: ffff8881446ce230 (&dev->event_lock){-...}-{2:2}, at: input_inject_event+0xa6/0x320 drivers/input/input.c:471
 #2: ffffffff8c17afe0 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:53 [inline]
 #2: ffffffff8c17afe0 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:50 [inline]
 #2: ffffffff8c17afe0 (rcu_read_lock){....}-{1:2}, at: input_inject_event+0x92/0x320 drivers/input/input.c:470
 #3: ffffffff8c17afe0 (rcu_read_lock){....}-{1:2}, at: input_dev_toggle drivers/input/input.c:1712 [inline]
 #3: ffffffff8c17afe0 (rcu_read_lock){....}-{1:2}, at: input_pass_values.part.0+0x0/0x710 drivers/input/input.c:1832
 #4: ffffffff8c17afe0 (rcu_read_lock){....}-{1:2}, at: evdev_events+0x59/0x3e0 drivers/input/evdev.c:296
 #5: ffff88801f95b028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:359 [inline]
 #5: ffff88801f95b028 (&client->buffer_lock){....}-{2:2}, at: evdev_pass_values.part.0+0xf6/0x970 drivers/input/evdev.c:261
 #6: ffffffff8c17afe0 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x3d/0x460 fs/fcntl.c:1031

the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
 -> (&evdev->mutex){+.+.}-{3:3} {
    HARDIRQ-ON-W at:
                      lock_acquire kernel/locking/lockdep.c:5512 [inline]
                      lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477
                      __mutex_lock_common kernel/locking/mutex.c:949 [inline]
                      __mutex_lock+0x139/0x1120 kernel/locking/mutex.c:1096
                      evdev_open_device drivers/input/evdev.c:393 [inline]
                      evdev_open+0x2f3/0x6a0 drivers/input/evdev.c:487
                      chrdev_open+0x266/0x770 fs/char_dev.c:414
                      do_dentry_open+0x4b9/0x11c0 fs/open.c:826
                      do_open fs/namei.c:3361 [inline]
                      path_openat+0x1c09/0x27d0 fs/namei.c:3494
                      do_filp_open+0x190/0x3d0 fs/namei.c:3521
                      do_sys_openat2+0x16d/0x420 fs/open.c:1196
                      do_sys_open fs/open.c:1212 [inline]
                      __do_sys_openat fs/open.c:1228 [inline]
                      __se_sys_openat fs/open.c:1223 [inline]
                      __x64_sys_openat+0x13f/0x1f0 fs/open.c:1223
                      do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47
                      entry_SYSCALL_64_after_hwframe+0x44/0xae
    SOFTIRQ-ON-W at:
                      lock_acquire kernel/locking/lockdep.c:5512 [inline]
                      lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477
                      __mutex_lock_common kernel/locking/mutex.c:949 [inline]
                      __mutex_lock+0x139/0x1120 kernel/locking/mutex.c:1096
                      evdev_open_device drivers/input/evdev.c:393 [inline]
                      evdev_open+0x2f3/0x6a0 drivers/input/evdev.c:487
                      chrdev_open+0x266/0x770 fs/char_dev.c:414
                      do_dentry_open+0x4b9/0x11c0 fs/open.c:826
                      do_open fs/namei.c:3361 [inline]
                      path_openat+0x1c09/0x27d0 fs/namei.c:3494
                      do_filp_open+0x190/0x3d0 fs/namei.c:3521
                      do_sys_openat2+0x16d/0x420 fs/open.c:1196
                      do_sys_open fs/open.c:1212 [inline]
                      __do_sys_openat fs/open.c:1228 [inline]
                      __se_sys_openat fs/open.c:1223 [inline]
                      __x64_sys_openat+0x13f/0x1f0 fs/open.c:1223
                      do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47
                      entry_SYSCALL_64_after_hwframe+0x44/0xae
    INITIAL USE at:
                     lock_acquire kernel/locking/lockdep.c:5512 [inline]
                     lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477
                     __mutex_lock_common kernel/locking/mutex.c:949 [inline]
                     __mutex_lock+0x139/0x1120 kernel/locking/mutex.c:1096
                     evdev_open_device drivers/input/evdev.c:393 [inline]
                     evdev_open+0x2f3/0x6a0 drivers/input/evdev.c:487
                     chrdev_open+0x266/0x770 fs/char_dev.c:414
                     do_dentry_open+0x4b9/0x11c0 fs/open.c:826
                     do_open fs/namei.c:3361 [inline]
                     path_openat+0x1c09/0x27d0 fs/namei.c:3494
                     do_filp_open+0x190/0x3d0 fs/namei.c:3521
                     do_sys_openat2+0x16d/0x420 fs/open.c:1196
                     do_sys_open fs/open.c:1212 [inline]
                     __do_sys_openat fs/open.c:1228 [inline]
                     __se_sys_openat fs/open.c:1223 [inline]
                     __x64_sys_openat+0x13f/0x1f0 fs/open.c:1223
                     do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47
                     entry_SYSCALL_64_after_hwframe+0x44/0xae
  }
  ... key      at: [<ffffffff90c9bc80>] __key.6+0x0/0x40
  ... acquired at:
   __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
   _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:159
   evdev_set_mask drivers/input/evdev.c:980 [inline]
   evdev_do_ioctl+0x2d7/0x1820 drivers/input/evdev.c:1117
   evdev_ioctl_handler drivers/input/evdev.c:1272 [inline]
   evdev_ioctl+0x145/0x1a0 drivers/input/evdev.c:1281
   vfs_ioctl fs/ioctl.c:51 [inline]
   __do_sys_ioctl fs/ioctl.c:1069 [inline]
   __se_sys_ioctl fs/ioctl.c:1055 [inline]
   __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:1055
   do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47
   entry_SYSCALL_64_after_hwframe+0x44/0xae

-> (&client->buffer_lock){....}-{2:2} {
   INITIAL USE at:
                   lock_acquire kernel/locking/lockdep.c:5512 [inline]
                   lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477
                   __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
                   _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:159
                   evdev_set_mask drivers/input/evdev.c:980 [inline]
                   evdev_do_ioctl+0x2d7/0x1820 drivers/input/evdev.c:1117
                   evdev_ioctl_handler drivers/input/evdev.c:1272 [inline]
                   evdev_ioctl+0x145/0x1a0 drivers/input/evdev.c:1281
                   vfs_ioctl fs/ioctl.c:51 [inline]
                   __do_sys_ioctl fs/ioctl.c:1069 [inline]
                   __se_sys_ioctl fs/ioctl.c:1055 [inline]
                   __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:1055
                   do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47
                   entry_SYSCALL_64_after_hwframe+0x44/0xae
 }
 ... key      at: [<ffffffff90c9bc00>] __key.4+0x0/0x40
 ... acquired at:
   lock_acquire kernel/locking/lockdep.c:5512 [inline]
   lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477
   __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
   _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223
   kill_fasync_rcu fs/fcntl.c:1012 [inline]
   kill_fasync fs/fcntl.c:1033 [inline]
   kill_fasync+0x132/0x460 fs/fcntl.c:1026
   __pass_event drivers/input/evdev.c:240 [inline]
   evdev_pass_values.part.0+0x64e/0x970 drivers/input/evdev.c:278
   evdev_pass_values drivers/input/evdev.c:253 [inline]
   evdev_events+0x359/0x3e0 drivers/input/evdev.c:306
   input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115
   input_pass_values.part.0+0x230/0x710 drivers/input/input.c:145
   input_pass_values drivers/input/input.c:134 [inline]
   input_handle_event+0x373/0x1440 drivers/input/input.c:404
   input_inject_event+0x1bd/0x320 drivers/input/input.c:476
   evdev_write+0x430/0x760 drivers/input/evdev.c:530
   vfs_write+0x28e/0xa40 fs/read_write.c:603
   ksys_write+0x1ee/0x250 fs/read_write.c:658
   do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47
   entry_SYSCALL_64_after_hwframe+0x44/0xae


the dependencies between the lock to be acquired
 and SOFTIRQ-irq-unsafe lock:
-> (&new->fa_lock){.+.-}-{2:2} {
   HARDIRQ-ON-R at:
                    lock_acquire kernel/locking/lockdep.c:5512 [inline]
                    lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477
                    __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                    _raw_read_lock+0x36/0x70 kernel/locking/spinlock.c:223
                    kill_fasync_rcu fs/fcntl.c:1012 [inline]
                    kill_fasync fs/fcntl.c:1033 [inline]
                    kill_fasync+0x132/0x460 fs/fcntl.c:1026
                    sock_wake_async+0xd2/0x160 net/socket.c:1312
                    sk_wake_async include/net/sock.h:2313 [inline]
                    sk_wake_async include/net/sock.h:2309 [inline]
                    sock_def_readable+0x349/0x4e0 net/core/sock.c:2912
                    dccp_fin net/dccp/input.c:40 [inline]
                    dccp_rcv_close+0x147/0x400 net/dccp/input.c:77
                    __dccp_rcv_established.constprop.0+0x1f8/0x390 net/dccp/input.c:316
                    dccp_rcv_established net/dccp/input.c:376 [inline]
                    dccp_rcv_established+0x112/0x160 net/dccp/input.c:364
                    dccp_v6_do_rcv+0x989/0xba0 net/dccp/ipv6.c:621
                    sk_backlog_rcv include/net/sock.h:1020 [inline]
                    __sk_receive_skb+0x29d/0x830 net/core/sock.c:509
                    dccp_v6_rcv+0xd8c/0x17e0 net/dccp/ipv6.c:790
                    ip6_protocol_deliver_rcu+0x2e9/0x17f0 net/ipv6/ip6_input.c:422
                    ip6_input_finish+0x62/0x170 net/ipv6/ip6_input.c:463
                    NF_HOOK include/linux/netfilter.h:301 [inline]
                    NF_HOOK include/linux/netfilter.h:295 [inline]
                    ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:472
                    dst_input include/net/dst.h:458 [inline]
                    ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline]
                    NF_HOOK include/linux/netfilter.h:301 [inline]
                    NF_HOOK include/linux/netfilter.h:295 [inline]
                    ipv6_rcv+0x28c/0x3c0 net/ipv6/ip6_input.c:297
                    __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5440
                    __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5554
                    process_backlog+0x2a5/0x6c0 net/core/dev.c:6418
                    __napi_poll+0xaf/0x440 net/core/dev.c:6973
                    napi_poll net/core/dev.c:7040 [inline]
                    net_rx_action+0x801/0xb40 net/core/dev.c:7127
                    __do_softirq+0x29b/0x9fb kernel/softirq.c:559
                    do_softirq.part.0+0xd9/0x130 kernel/softirq.c:460
                    do_softirq kernel/softirq.c:452 [inline]
                    __local_bh_enable_ip+0x102/0x120 kernel/softirq.c:384
                    local_bh_enable include/linux/bottom_half.h:32 [inline]
                    rcu_read_unlock_bh include/linux/rcupdate.h:757 [inline]
                    ip6_finish_output2+0x6d4/0x1700 net/ipv6/ip6_output.c:118
                    __ip6_finish_output net/ipv6/ip6_output.c:182 [inline]
                    __ip6_finish_output+0x4c1/0xe10 net/ipv6/ip6_output.c:161
                    ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:192
                    NF_HOOK_COND include/linux/netfilter.h:290 [inline]
                    ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:215
                    dst_output include/net/dst.h:448 [inline]
                    NF_HOOK include/linux/netfilter.h:301 [inline]
                    NF_HOOK include/linux/netfilter.h:295 [inline]
                    ip6_xmit+0x1277/0x1ea0 net/ipv6/ip6_output.c:320
                    inet6_csk_xmit+0x333/0x630 net/ipv6/inet6_connection_sock.c:135
                    dccp_transmit_skb+0x973/0x12c0 net/dccp/output.c:138
                    dccp_send_close+0x1f0/0x350 net/dccp/output.c:708
                    dccp_terminate_connection net/dccp/proto.c:965 [inline]
                    dccp_close+0x9cc/0xe60 net/dccp/proto.c:1028
                    inet_release+0x12e/0x280 net/ipv4/af_inet.c:431
                    inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:478
                    __sock_release+0xcd/0x280 net/socket.c:599
                    sock_close+0x18/0x20 net/socket.c:1258
                    __fput+0x288/0x920 fs/file_table.c:280
                    task_work_run+0xdd/0x1a0 kernel/task_work.c:164
                    tracehook_notify_resume include/linux/tracehook.h:189 [inline]
                    exit_to_user_mode_loop kernel/entry/common.c:174 [inline]
                    exit_to_user_mode_prepare+0x26f/0x280 kernel/entry/common.c:208
                    __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
                    syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301
                    do_syscall_64+0x3e/0xb0 arch/x86/entry/common.c:57
                    entry_SYSCALL_64_after_hwframe+0x44/0xae
   IN-SOFTIRQ-R at:
                    lock_acquire kernel/locking/lockdep.c:5512 [inline]
                    lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477
                    __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                    _raw_read_lock+0x36/0x70 kernel/locking/spinlock.c:223
                    kill_fasync_rcu fs/fcntl.c:1012 [inline]
                    kill_fasync fs/fcntl.c:1033 [inline]
                    kill_fasync+0x132/0x460 fs/fcntl.c:1026
                    sock_wake_async+0xd2/0x160 net/socket.c:1312
                    sk_wake_async include/net/sock.h:2313 [inline]
                    sk_wake_async include/net/sock.h:2309 [inline]
                    sock_def_readable+0x349/0x4e0 net/core/sock.c:2912
                    dccp_fin net/dccp/input.c:40 [inline]
                    dccp_rcv_close+0x147/0x400 net/dccp/input.c:77
                    __dccp_rcv_established.constprop.0+0x1f8/0x390 net/dccp/input.c:316
                    dccp_rcv_established net/dccp/input.c:376 [inline]
                    dccp_rcv_established+0x112/0x160 net/dccp/input.c:364
                    dccp_v6_do_rcv+0x989/0xba0 net/dccp/ipv6.c:621
                    sk_backlog_rcv include/net/sock.h:1020 [inline]
                    __sk_receive_skb+0x29d/0x830 net/core/sock.c:509
                    dccp_v6_rcv+0xd8c/0x17e0 net/dccp/ipv6.c:790
                    ip6_protocol_deliver_rcu+0x2e9/0x17f0 net/ipv6/ip6_input.c:422
                    ip6_input_finish+0x62/0x170 net/ipv6/ip6_input.c:463
                    NF_HOOK include/linux/netfilter.h:301 [inline]
                    NF_HOOK include/linux/netfilter.h:295 [inline]
                    ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:472
                    dst_input include/net/dst.h:458 [inline]
                    ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline]
                    NF_HOOK include/linux/netfilter.h:301 [inline]
                    NF_HOOK include/linux/netfilter.h:295 [inline]
                    ipv6_rcv+0x28c/0x3c0 net/ipv6/ip6_input.c:297
                    __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5440
                    __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5554
                    process_backlog+0x2a5/0x6c0 net/core/dev.c:6418
                    __napi_poll+0xaf/0x440 net/core/dev.c:6973
                    napi_poll net/core/dev.c:7040 [inline]
                    net_rx_action+0x801/0xb40 net/core/dev.c:7127
                    __do_softirq+0x29b/0x9fb kernel/softirq.c:559
                    do_softirq.part.0+0xd9/0x130 kernel/softirq.c:460
                    do_softirq kernel/softirq.c:452 [inline]
                    __local_bh_enable_ip+0x102/0x120 kernel/softirq.c:384
                    local_bh_enable include/linux/bottom_half.h:32 [inline]
                    rcu_read_unlock_bh include/linux/rcupdate.h:757 [inline]
                    ip6_finish_output2+0x6d4/0x1700 net/ipv6/ip6_output.c:118
                    __ip6_finish_output net/ipv6/ip6_output.c:182 [inline]
                    __ip6_finish_output+0x4c1/0xe10 net/ipv6/ip6_output.c:161
                    ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:192
                    NF_HOOK_COND include/linux/netfilter.h:290 [inline]
                    ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:215
                    dst_output include/net/dst.h:448 [inline]
                    NF_HOOK include/linux/netfilter.h:301 [inline]
                    NF_HOOK include/linux/netfilter.h:295 [inline]
                    ip6_xmit+0x1277/0x1ea0 net/ipv6/ip6_output.c:320
                    inet6_csk_xmit+0x333/0x630 net/ipv6/inet6_connection_sock.c:135
                    dccp_transmit_skb+0x973/0x12c0 net/dccp/output.c:138
                    dccp_send_close+0x1f0/0x350 net/dccp/output.c:708
                    dccp_terminate_connection net/dccp/proto.c:965 [inline]
                    dccp_close+0x9cc/0xe60 net/dccp/proto.c:1028
                    inet_release+0x12e/0x280 net/ipv4/af_inet.c:431
                    inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:478
                    __sock_release+0xcd/0x280 net/socket.c:599
                    sock_close+0x18/0x20 net/socket.c:1258
                    __fput+0x288/0x920 fs/file_table.c:280
                    task_work_run+0xdd/0x1a0 kernel/task_work.c:164
                    tracehook_notify_resume include/linux/tracehook.h:189 [inline]
                    exit_to_user_mode_loop kernel/entry/common.c:174 [inline]
                    exit_to_user_mode_prepare+0x26f/0x280 kernel/entry/common.c:208
                    __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
                    syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301
                    do_syscall_64+0x3e/0xb0 arch/x86/entry/common.c:57
                    entry_SYSCALL_64_after_hwframe+0x44/0xae
   INITIAL USE at:
                   lock_acquire kernel/locking/lockdep.c:5512 [inline]
                   lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477
                   __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline]
                   _raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:311
                   fasync_remove_entry+0xb6/0x1f0 fs/fcntl.c:890
                   fasync_helper+0x9e/0xb0 fs/fcntl.c:993
                   lease_modify fs/locks.c:1522 [inline]
                   lease_modify+0x28a/0x370 fs/locks.c:1509
                   locks_remove_lease fs/locks.c:2771 [inline]
                   locks_remove_file+0x29e/0x570 fs/locks.c:2796
                   __fput+0x1bb/0x920 fs/file_table.c:272
                   task_work_run+0xdd/0x1a0 kernel/task_work.c:164
                   tracehook_notify_resume include/linux/tracehook.h:189 [inline]
                   exit_to_user_mode_loop kernel/entry/common.c:174 [inline]
                   exit_to_user_mode_prepare+0x26f/0x280 kernel/entry/common.c:208
                   __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
                   syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301
                   do_syscall_64+0x3e/0xb0 arch/x86/entry/common.c:57
                   entry_SYSCALL_64_after_hwframe+0x44/0xae
   INITIAL READ USE at:
                        lock_acquire kernel/locking/lockdep.c:5512 [inline]
                        lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477
                        __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                        _raw_read_lock+0x36/0x70 kernel/locking/spinlock.c:223
                        kill_fasync_rcu fs/fcntl.c:1012 [inline]
                        kill_fasync fs/fcntl.c:1033 [inline]
                        kill_fasync+0x132/0x460 fs/fcntl.c:1026
                        sock_wake_async+0xd2/0x160 net/socket.c:1312
                        sk_wake_async include/net/sock.h:2313 [inline]
                        sk_wake_async include/net/sock.h:2309 [inline]
                        sock_def_readable+0x349/0x4e0 net/core/sock.c:2912
                        dccp_fin net/dccp/input.c:40 [inline]
                        dccp_rcv_close+0x147/0x400 net/dccp/input.c:77
                        __dccp_rcv_established.constprop.0+0x1f8/0x390 net/dccp/input.c:316
                        dccp_rcv_established net/dccp/input.c:376 [inline]
                        dccp_rcv_established+0x112/0x160 net/dccp/input.c:364
                        dccp_v6_do_rcv+0x989/0xba0 net/dccp/ipv6.c:621
                        sk_backlog_rcv include/net/sock.h:1020 [inline]
                        __sk_receive_skb+0x29d/0x830 net/core/sock.c:509
                        dccp_v6_rcv+0xd8c/0x17e0 net/dccp/ipv6.c:790
                        ip6_protocol_deliver_rcu+0x2e9/0x17f0 net/ipv6/ip6_input.c:422
                        ip6_input_finish+0x62/0x170 net/ipv6/ip6_input.c:463
                        NF_HOOK include/linux/netfilter.h:301 [inline]
                        NF_HOOK include/linux/netfilter.h:295 [inline]
                        ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:472
                        dst_input include/net/dst.h:458 [inline]
                        ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline]
                        NF_HOOK include/linux/netfilter.h:301 [inline]
                        NF_HOOK include/linux/netfilter.h:295 [inline]
                        ipv6_rcv+0x28c/0x3c0 net/ipv6/ip6_input.c:297
                        __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5440
                        __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5554
                        process_backlog+0x2a5/0x6c0 net/core/dev.c:6418
                        __napi_poll+0xaf/0x440 net/core/dev.c:6973
                        napi_poll net/core/dev.c:7040 [inline]
                        net_rx_action+0x801/0xb40 net/core/dev.c:7127
                        __do_softirq+0x29b/0x9fb kernel/softirq.c:559
                        do_softirq.part.0+0xd9/0x130 kernel/softirq.c:460
                        do_softirq kernel/softirq.c:452 [inline]
                        __local_bh_enable_ip+0x102/0x120 kernel/softirq.c:384
                        local_bh_enable include/linux/bottom_half.h:32 [inline]
                        rcu_read_unlock_bh include/linux/rcupdate.h:757 [inline]
                        ip6_finish_output2+0x6d4/0x1700 net/ipv6/ip6_output.c:118
                        __ip6_finish_output net/ipv6/ip6_output.c:182 [inline]
                        __ip6_finish_output+0x4c1/0xe10 net/ipv6/ip6_output.c:161
                        ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:192
                        NF_HOOK_COND include/linux/netfilter.h:290 [inline]
                        ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:215
                        dst_output include/net/dst.h:448 [inline]
                        NF_HOOK include/linux/netfilter.h:301 [inline]
                        NF_HOOK include/linux/netfilter.h:295 [inline]
                        ip6_xmit+0x1277/0x1ea0 net/ipv6/ip6_output.c:320
                        inet6_csk_xmit+0x333/0x630 net/ipv6/inet6_connection_sock.c:135
                        dccp_transmit_skb+0x973/0x12c0 net/dccp/output.c:138
                        dccp_send_close+0x1f0/0x350 net/dccp/output.c:708
                        dccp_terminate_connection net/dccp/proto.c:965 [inline]
                        dccp_close+0x9cc/0xe60 net/dccp/proto.c:1028
                        inet_release+0x12e/0x280 net/ipv4/af_inet.c:431
                        inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:478
                        __sock_release+0xcd/0x280 net/socket.c:599
                        sock_close+0x18/0x20 net/socket.c:1258
                        __fput+0x288/0x920 fs/file_table.c:280
                        task_work_run+0xdd/0x1a0 kernel/task_work.c:164
                        tracehook_notify_resume include/linux/tracehook.h:189 [inline]
                        exit_to_user_mode_loop kernel/entry/common.c:174 [inline]
                        exit_to_user_mode_prepare+0x26f/0x280 kernel/entry/common.c:208
                        __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
                        syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301
                        do_syscall_64+0x3e/0xb0 arch/x86/entry/common.c:57
                        entry_SYSCALL_64_after_hwframe+0x44/0xae
 }
 ... key      at: [<ffffffff909f5f60>] __key.0+0x0/0x40
 ... acquired at:
   lock_acquire kernel/locking/lockdep.c:5512 [inline]
   lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477
   __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
   _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223
   kill_fasync_rcu fs/fcntl.c:1012 [inline]
   kill_fasync fs/fcntl.c:1033 [inline]
   kill_fasync+0x132/0x460 fs/fcntl.c:1026
   __pass_event drivers/input/evdev.c:240 [inline]
   evdev_pass_values.part.0+0x64e/0x970 drivers/input/evdev.c:278
   evdev_pass_values drivers/input/evdev.c:253 [inline]
   evdev_events+0x359/0x3e0 drivers/input/evdev.c:306
   input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115
   input_pass_values.part.0+0x230/0x710 drivers/input/input.c:145
   input_pass_values drivers/input/input.c:134 [inline]
   input_handle_event+0x373/0x1440 drivers/input/input.c:404
   input_inject_event+0x1bd/0x320 drivers/input/input.c:476
   evdev_write+0x430/0x760 drivers/input/evdev.c:530
   vfs_write+0x28e/0xa40 fs/read_write.c:603
   ksys_write+0x1ee/0x250 fs/read_write.c:658
   do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47
   entry_SYSCALL_64_after_hwframe+0x44/0xae


stack backtrace:
CPU: 1 PID: 15227 Comm: syz-executor.5 Not tainted 5.13.0-rc1-next-20210514-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x13e/0x1d6 lib/dump_stack.c:129
 print_bad_irq_dependency kernel/locking/lockdep.c:2462 [inline]
 check_irq_usage.cold+0x4d6/0x6c5 kernel/locking/lockdep.c:2691
 check_prev_add kernel/locking/lockdep.c:2942 [inline]
 check_prevs_add kernel/locking/lockdep.c:3061 [inline]
 validate_chain kernel/locking/lockdep.c:3676 [inline]
 __lock_acquire+0x2a2f/0x5230 kernel/locking/lockdep.c:4902
 lock_acquire kernel/locking/lockdep.c:5512 [inline]
 lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477
 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
 _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223
 kill_fasync_rcu fs/fcntl.c:1012 [inline]
 kill_fasync fs/fcntl.c:1033 [inline]
 kill_fasync+0x132/0x460 fs/fcntl.c:1026
 __pass_event drivers/input/evdev.c:240 [inline]
 evdev_pass_values.part.0+0x64e/0x970 drivers/input/evdev.c:278
 evdev_pass_values drivers/input/evdev.c:253 [inline]
 evdev_events+0x359/0x3e0 drivers/input/evdev.c:306
 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115
 input_pass_values.part.0+0x230/0x710 drivers/input/input.c:145
 input_pass_values drivers/input/input.c:134 [inline]
 input_handle_event+0x373/0x1440 drivers/input/input.c:404
 input_inject_event+0x1bd/0x320 drivers/input/input.c:476
 evdev_write+0x430/0x760 drivers/input/evdev.c:530
 vfs_write+0x28e/0xa40 fs/read_write.c:603
 ksys_write+0x1ee/0x250 fs/read_write.c:658
 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd6233b3188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665d9
RDX: 0000000000035000 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007fff0a4cb94f R14: 00007fd6233b3300 R15: 0000000000022000