syzbot


possible deadlock in evdev_cleanup

Status: auto-closed as invalid on 2021/09/24 06:27
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 677d, last: 518d

Sample crash report:
=====================================================
WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected
5.13.0-rc7-syzkaller #0 Not tainted
-----------------------------------------------------
syz-executor.0/31496 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffff88806bfe29f0 (&new->fa_lock){.?.?}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1012 [inline]
ffff88806bfe29f0 (&new->fa_lock){.?.?}-{2:2}, at: kill_fasync fs/fcntl.c:1033 [inline]
ffff88806bfe29f0 (&new->fa_lock){.?.?}-{2:2}, at: kill_fasync+0x14b/0x460 fs/fcntl.c:1026

and this task is already holding:
ffff88806c79f028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline]
ffff88806c79f028 (&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 HARDIRQ-irq-safe lock:
 (&evdev->mutex){+.+.}-{3:3}

... which became HARDIRQ-irq-safe at:
  lock_acquire kernel/locking/lockdep.c:5514 [inline]
  lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5479
  __mutex_lock_common kernel/locking/mutex.c:959 [inline]
  __mutex_lock+0x139/0x10c0 kernel/locking/mutex.c:1104
  evdev_mark_dead drivers/input/evdev.c:1314 [inline]
  evdev_cleanup+0x21/0x1a0 drivers/input/evdev.c:1323
  evdev_disconnect+0x45/0xb0 drivers/input/evdev.c:1407
  __input_unregister_device+0x206/0x470 drivers/input/input.c:2189
  input_unregister_device+0xb4/0xf0 drivers/input/input.c:2379
  uinput_destroy_device+0x1f4/0x260 drivers/input/misc/uinput.c:298
  uinput_release+0x37/0x50 drivers/input/misc/uinput.c:710
  __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:175 [inline]
  exit_to_user_mode_prepare+0x281/0x290 kernel/entry/common.c:209
  __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
  syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
  do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:57
  entry_SYSCALL_64_after_hwframe+0x44/0xae

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

... which became HARDIRQ-irq-unsafe at:
...
  lock_acquire kernel/locking/lockdep.c:5514 [inline]
  lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5479
  __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+0x14b/0x460 fs/fcntl.c:1026
  perf_event_wakeup kernel/events/core.c:6387 [inline]
  perf_pending_event+0x432/0x560 kernel/events/core.c:6470
  irq_work_single+0x120/0x1f0 kernel/irq_work.c:155
  irq_work_run_list+0x91/0xc0 kernel/irq_work.c:177
  irq_work_run+0x54/0xd0 kernel/irq_work.c:186
  __sysvec_irq_work+0x95/0x3d0 arch/x86/kernel/irq_work.c:22
  sysvec_irq_work+0x8e/0xc0 arch/x86/kernel/irq_work.c:17
  asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:673
  native_apic_mem_write arch/x86/include/asm/apic.h:107 [inline]
  __default_send_IPI_shortcut arch/x86/kernel/apic/ipi.c:139 [inline]
  default_send_IPI_self+0x5d/0xe0 arch/x86/kernel/apic/ipi.c:242
  arch_irq_work_raise+0x92/0x110 arch/x86/kernel/irq_work.c:31
  __irq_work_queue_local kernel/irq_work.c:59 [inline]
  __irq_work_queue_local+0x133/0x190 kernel/irq_work.c:53
  irq_work_queue kernel/irq_work.c:75 [inline]
  irq_work_queue+0x47/0x80 kernel/irq_work.c:67
  perf_output_wakeup kernel/events/ring_buffer.c:25 [inline]
  perf_output_put_handle+0x2e3/0x3f0 kernel/events/ring_buffer.c:131
  perf_output_end+0x12/0xb0 kernel/events/ring_buffer.c:301
  __perf_event_output kernel/events/core.c:7448 [inline]
  perf_event_output_backward+0x13a/0x270 kernel/events/core.c:7468
  __perf_event_overflow+0x13c/0x3d0 kernel/events/core.c:9135
  perf_swevent_overflow kernel/events/core.c:9211 [inline]
  perf_swevent_event+0x347/0x550 kernel/events/core.c:9239
  do_perf_sw_event kernel/events/core.c:9352 [inline]
  ___perf_sw_event+0x31a/0x570 kernel/events/core.c:9383
  __perf_sw_event+0x54/0x130 kernel/events/core.c:9395
  perf_sw_event include/linux/perf_event.h:1170 [inline]
  do_user_addr_fault+0x5e1/0x1210 arch/x86/mm/fault.c:1294
  handle_page_fault arch/x86/mm/fault.c:1475 [inline]
  exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1531
  asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:577
  __clear_user+0x40/0x70 arch/x86/lib/usercopy_64.c:24
  clear_user+0xd3/0x110 arch/x86/lib/usercopy_64.c:54
  iov_iter_zero+0x242/0x1830 lib/iov_iter.c:1029
  read_iter_zero+0x10f/0x250 drivers/char/mem.c:493
  call_read_iter include/linux/fs.h:2108 [inline]
  do_iter_readv_writev+0x56a/0x740 fs/read_write.c:738
  do_iter_read+0x285/0x6e0 fs/read_write.c:801
  vfs_readv+0xe5/0x150 fs/read_write.c:921
  do_readv+0x139/0x300 fs/read_write.c:958
  do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
  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.0/31496:
 #0: ffff888024afb110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x1d3/0x760 drivers/input/evdev.c:513
 #1: ffff888024958230 (&dev->event_lock){-...}-{2:2}, at: input_inject_event+0xa6/0x310 drivers/input/input.c:471
 #2: ffffffff8bf76da0 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:53 [inline]
 #2: ffffffff8bf76da0 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:50 [inline]
 #2: ffffffff8bf76da0 (rcu_read_lock){....}-{1:2}, at: input_inject_event+0x92/0x310 drivers/input/input.c:470
 #3: ffffffff8bf76da0 (rcu_read_lock){....}-{1:2}, at: input_dev_toggle drivers/input/input.c:1712 [inline]
 #3: ffffffff8bf76da0 (rcu_read_lock){....}-{1:2}, at: input_pass_values.part.0+0x0/0x700 drivers/input/input.c:1832
 #4: ffffffff8bf76da0 (rcu_read_lock){....}-{1:2}, at: evdev_events+0x59/0x3f0 drivers/input/evdev.c:296
 #5: ffff88806c79f028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline]
 #5: ffff88806c79f028 (&client->buffer_lock){....}-{2:2}, at: evdev_pass_values.part.0+0xf6/0x970 drivers/input/evdev.c:261
 #6: ffffffff8bf76da0 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x3d/0x460 fs/fcntl.c:1031

the dependencies between HARDIRQ-irq-safe lock and the holding lock:
 -> (&evdev->mutex){+.+.}-{3:3} {
    HARDIRQ-ON-W at:
                      lock_acquire kernel/locking/lockdep.c:5514 [inline]
                      lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5479
                      __mutex_lock_common kernel/locking/mutex.c:959 [inline]
                      __mutex_lock+0x139/0x10c0 kernel/locking/mutex.c:1104
                      evdev_mark_dead drivers/input/evdev.c:1314 [inline]
                      evdev_cleanup+0x21/0x1a0 drivers/input/evdev.c:1323
                      evdev_disconnect+0x45/0xb0 drivers/input/evdev.c:1407
                      __input_unregister_device+0x206/0x470 drivers/input/input.c:2189
                      input_unregister_device+0xb4/0xf0 drivers/input/input.c:2379
                      uinput_destroy_device+0x1f4/0x260 drivers/input/misc/uinput.c:298
                      uinput_release+0x37/0x50 drivers/input/misc/uinput.c:710
                      __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:175 [inline]
                      exit_to_user_mode_prepare+0x281/0x290 kernel/entry/common.c:209
                      __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
                      syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
                      do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:57
                      entry_SYSCALL_64_after_hwframe+0x44/0xae
    SOFTIRQ-ON-W at:
                      lock_acquire kernel/locking/lockdep.c:5514 [inline]
                      lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5479
                      __mutex_lock_common kernel/locking/mutex.c:959 [inline]
                      __mutex_lock+0x139/0x10c0 kernel/locking/mutex.c:1104
                      evdev_mark_dead drivers/input/evdev.c:1314 [inline]
                      evdev_cleanup+0x21/0x1a0 drivers/input/evdev.c:1323
                      evdev_disconnect+0x45/0xb0 drivers/input/evdev.c:1407
                      __input_unregister_device+0x206/0x470 drivers/input/input.c:2189
                      input_unregister_device+0xb4/0xf0 drivers/input/input.c:2379
                      uinput_destroy_device+0x1f4/0x260 drivers/input/misc/uinput.c:298
                      uinput_release+0x37/0x50 drivers/input/misc/uinput.c:710
                      __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:175 [inline]
                      exit_to_user_mode_prepare+0x281/0x290 kernel/entry/common.c:209
                      __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
                      syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
                      do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:57
                      entry_SYSCALL_64_after_hwframe+0x44/0xae
    INITIAL USE at:
                     lock_acquire kernel/locking/lockdep.c:5514 [inline]
                     lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5479
                     __mutex_lock_common kernel/locking/mutex.c:959 [inline]
                     __mutex_lock+0x139/0x10c0 kernel/locking/mutex.c:1104
                     evdev_mark_dead drivers/input/evdev.c:1314 [inline]
                     evdev_cleanup+0x21/0x1a0 drivers/input/evdev.c:1323
                     evdev_disconnect+0x45/0xb0 drivers/input/evdev.c:1407
                     __input_unregister_device+0x206/0x470 drivers/input/input.c:2189
                     input_unregister_device+0xb4/0xf0 drivers/input/input.c:2379
                     uinput_destroy_device+0x1f4/0x260 drivers/input/misc/uinput.c:298
                     uinput_release+0x37/0x50 drivers/input/misc/uinput.c:710
                     __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:175 [inline]
                     exit_to_user_mode_prepare+0x281/0x290 kernel/entry/common.c:209
                     __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
                     syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
                     do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:57
                     entry_SYSCALL_64_after_hwframe+0x44/0xae
  }
  ... key      at: [<ffffffff90a9c300>] __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_clk_type drivers/input/evdev.c:201 [inline]
   evdev_do_ioctl+0x726/0x1820 drivers/input/evdev.c:1126
   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+0x3a/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:5514 [inline]
                   lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5479
                   __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_clk_type drivers/input/evdev.c:201 [inline]
                   evdev_do_ioctl+0x726/0x1820 drivers/input/evdev.c:1126
                   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+0x3a/0xb0 arch/x86/entry/common.c:47
                   entry_SYSCALL_64_after_hwframe+0x44/0xae
 }
 ... key      at: [<ffffffff90a9c280>] __key.4+0x0/0x40
 ... acquired at:
   lock_acquire kernel/locking/lockdep.c:5514 [inline]
   lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5479
   __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+0x14b/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+0x28b/0x3f0 drivers/input/evdev.c:306
   input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115
   input_pass_values.part.0+0x284/0x700 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+0x2f5/0x310 drivers/input/input.c:476
   evdev_write+0x430/0x760 drivers/input/evdev.c:530
   vfs_write+0x28e/0xa30 fs/read_write.c:603
   ksys_write+0x1ee/0x250 fs/read_write.c:658
   do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
   entry_SYSCALL_64_after_hwframe+0x44/0xae


the dependencies between the lock to be acquired
 and HARDIRQ-irq-unsafe lock:
-> (&new->fa_lock){.?.?}-{2:2} {
   IN-HARDIRQ-R at:
                    lock_acquire kernel/locking/lockdep.c:5514 [inline]
                    lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5479
                    __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+0x14b/0x460 fs/fcntl.c:1026
                    perf_event_wakeup kernel/events/core.c:6387 [inline]
                    perf_pending_event+0x432/0x560 kernel/events/core.c:6470
                    irq_work_single+0x120/0x1f0 kernel/irq_work.c:155
                    irq_work_run_list+0x91/0xc0 kernel/irq_work.c:177
                    irq_work_run+0x54/0xd0 kernel/irq_work.c:186
                    __sysvec_irq_work+0x95/0x3d0 arch/x86/kernel/irq_work.c:22
                    sysvec_irq_work+0x8e/0xc0 arch/x86/kernel/irq_work.c:17
                    asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:673
                    native_apic_mem_write arch/x86/include/asm/apic.h:107 [inline]
                    __default_send_IPI_shortcut arch/x86/kernel/apic/ipi.c:139 [inline]
                    default_send_IPI_self+0x5d/0xe0 arch/x86/kernel/apic/ipi.c:242
                    arch_irq_work_raise+0x92/0x110 arch/x86/kernel/irq_work.c:31
                    __irq_work_queue_local kernel/irq_work.c:59 [inline]
                    __irq_work_queue_local+0x133/0x190 kernel/irq_work.c:53
                    irq_work_queue kernel/irq_work.c:75 [inline]
                    irq_work_queue+0x47/0x80 kernel/irq_work.c:67
                    perf_output_wakeup kernel/events/ring_buffer.c:25 [inline]
                    perf_output_put_handle+0x2e3/0x3f0 kernel/events/ring_buffer.c:131
                    perf_output_end+0x12/0xb0 kernel/events/ring_buffer.c:301
                    __perf_event_output kernel/events/core.c:7448 [inline]
                    perf_event_output_backward+0x13a/0x270 kernel/events/core.c:7468
                    __perf_event_overflow+0x13c/0x3d0 kernel/events/core.c:9135
                    perf_swevent_overflow kernel/events/core.c:9211 [inline]
                    perf_swevent_event+0x347/0x550 kernel/events/core.c:9239
                    do_perf_sw_event kernel/events/core.c:9352 [inline]
                    ___perf_sw_event+0x31a/0x570 kernel/events/core.c:9383
                    __perf_sw_event+0x54/0x130 kernel/events/core.c:9395
                    perf_sw_event include/linux/perf_event.h:1170 [inline]
                    do_user_addr_fault+0x5e1/0x1210 arch/x86/mm/fault.c:1294
                    handle_page_fault arch/x86/mm/fault.c:1475 [inline]
                    exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1531
                    asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:577
                    __clear_user+0x40/0x70 arch/x86/lib/usercopy_64.c:24
                    clear_user+0xd3/0x110 arch/x86/lib/usercopy_64.c:54
                    iov_iter_zero+0x242/0x1830 lib/iov_iter.c:1029
                    read_iter_zero+0x10f/0x250 drivers/char/mem.c:493
                    call_read_iter include/linux/fs.h:2108 [inline]
                    do_iter_readv_writev+0x56a/0x740 fs/read_write.c:738
                    do_iter_read+0x285/0x6e0 fs/read_write.c:801
                    vfs_readv+0xe5/0x150 fs/read_write.c:921
                    do_readv+0x139/0x300 fs/read_write.c:958
                    do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
                    entry_SYSCALL_64_after_hwframe+0x44/0xae
   HARDIRQ-ON-R at:
                    lock_acquire kernel/locking/lockdep.c:5514 [inline]
                    lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5479
                    __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+0x14b/0x460 fs/fcntl.c:1026
                    sock_wake_async+0xd2/0x160 net/socket.c:1299
                    sk_wake_async include/net/sock.h:2322 [inline]
                    sk_wake_async include/net/sock.h:2318 [inline]
                    tcp_fin+0x72d/0x970 net/ipv4/tcp_input.c:4348
                    tcp_data_queue+0x20de/0x4b10 net/ipv4/tcp_input.c:4973
                    tcp_rcv_established+0x841/0x1eb0 net/ipv4/tcp_input.c:5881
                    tcp_v4_do_rcv+0x5d1/0x870 net/ipv4/tcp_ipv4.c:1694
                    tcp_v4_rcv+0x3298/0x3950 net/ipv4/tcp_ipv4.c:2077
                    ip_protocol_deliver_rcu+0x5c/0xa20 net/ipv4/ip_input.c:204
                    ip_local_deliver_finish+0x20a/0x370 net/ipv4/ip_input.c:231
                    NF_HOOK include/linux/netfilter.h:301 [inline]
                    NF_HOOK include/linux/netfilter.h:295 [inline]
                    ip_local_deliver+0x1b3/0x200 net/ipv4/ip_input.c:252
                    dst_input include/net/dst.h:458 [inline]
                    ip_rcv_finish+0x1da/0x2f0 net/ipv4/ip_input.c:429
                    NF_HOOK include/linux/netfilter.h:301 [inline]
                    NF_HOOK include/linux/netfilter.h:295 [inline]
                    ip_rcv+0xaa/0xd0 net/ipv4/ip_input.c:540
                    __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5459
                    __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5573
                    process_backlog+0x232/0x6c0 net/core/dev.c:6437
                    __napi_poll+0xaf/0x440 net/core/dev.c:6985
                    napi_poll net/core/dev.c:7052 [inline]
                    net_rx_action+0x801/0xb40 net/core/dev.c:7139
                    __do_softirq+0x29b/0x9f6 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:746 [inline]
                    ip_finish_output2+0x88b/0x21f0 net/ipv4/ip_output.c:231
                    __ip_finish_output net/ipv4/ip_output.c:308 [inline]
                    __ip_finish_output+0x396/0x640 net/ipv4/ip_output.c:290
                    ip_finish_output+0x35/0x200 net/ipv4/ip_output.c:318
                    NF_HOOK_COND include/linux/netfilter.h:290 [inline]
                    ip_output+0x196/0x310 net/ipv4/ip_output.c:432
                    dst_output include/net/dst.h:448 [inline]
                    ip_local_out net/ipv4/ip_output.c:126 [inline]
                    __ip_queue_xmit+0x905/0x1a20 net/ipv4/ip_output.c:533
                    __tcp_transmit_skb+0x1883/0x38f0 net/ipv4/tcp_output.c:1405
                    tcp_transmit_skb net/ipv4/tcp_output.c:1423 [inline]
                    tcp_write_xmit+0xdee/0x6040 net/ipv4/tcp_output.c:2689
                    __tcp_push_pending_frames+0xaa/0x390 net/ipv4/tcp_output.c:2873
                    tcp_send_fin+0x117/0xbb0 net/ipv4/tcp_output.c:3422
                    __tcp_close+0xaca/0x1170 net/ipv4/tcp.c:2790
                    tcp_close+0x29/0xc0 net/ipv4/tcp.c:2880
                    inet_release+0x12e/0x280 net/ipv4/af_inet.c:431
                    __sock_release+0xcd/0x280 net/socket.c:599
                    sock_close+0x18/0x20 net/socket.c:1245
                    __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:175 [inline]
                    exit_to_user_mode_prepare+0x281/0x290 kernel/entry/common.c:209
                    __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
                    syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
                    do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:57
                    entry_SYSCALL_64_after_hwframe+0x44/0xae
   IN-SOFTIRQ-R at:
                    lock_acquire kernel/locking/lockdep.c:5514 [inline]
                    lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5479
                    __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+0x14b/0x460 fs/fcntl.c:1026
                    sock_wake_async+0xd2/0x160 net/socket.c:1299
                    sk_wake_async include/net/sock.h:2322 [inline]
                    sk_wake_async include/net/sock.h:2318 [inline]
                    tcp_fin+0x72d/0x970 net/ipv4/tcp_input.c:4348
                    tcp_data_queue+0x20de/0x4b10 net/ipv4/tcp_input.c:4973
                    tcp_rcv_established+0x841/0x1eb0 net/ipv4/tcp_input.c:5881
                    tcp_v4_do_rcv+0x5d1/0x870 net/ipv4/tcp_ipv4.c:1694
                    tcp_v4_rcv+0x3298/0x3950 net/ipv4/tcp_ipv4.c:2077
                    ip_protocol_deliver_rcu+0x5c/0xa20 net/ipv4/ip_input.c:204
                    ip_local_deliver_finish+0x20a/0x370 net/ipv4/ip_input.c:231
                    NF_HOOK include/linux/netfilter.h:301 [inline]
                    NF_HOOK include/linux/netfilter.h:295 [inline]
                    ip_local_deliver+0x1b3/0x200 net/ipv4/ip_input.c:252
                    dst_input include/net/dst.h:458 [inline]
                    ip_rcv_finish+0x1da/0x2f0 net/ipv4/ip_input.c:429
                    NF_HOOK include/linux/netfilter.h:301 [inline]
                    NF_HOOK include/linux/netfilter.h:295 [inline]
                    ip_rcv+0xaa/0xd0 net/ipv4/ip_input.c:540
                    __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5459
                    __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5573
                    process_backlog+0x232/0x6c0 net/core/dev.c:6437
                    __napi_poll+0xaf/0x440 net/core/dev.c:6985
                    napi_poll net/core/dev.c:7052 [inline]
                    net_rx_action+0x801/0xb40 net/core/dev.c:7139
                    __do_softirq+0x29b/0x9f6 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:746 [inline]
                    ip_finish_output2+0x88b/0x21f0 net/ipv4/ip_output.c:231
                    __ip_finish_output net/ipv4/ip_output.c:308 [inline]
                    __ip_finish_output+0x396/0x640 net/ipv4/ip_output.c:290
                    ip_finish_output+0x35/0x200 net/ipv4/ip_output.c:318
                    NF_HOOK_COND include/linux/netfilter.h:290 [inline]
                    ip_output+0x196/0x310 net/ipv4/ip_output.c:432
                    dst_output include/net/dst.h:448 [inline]
                    ip_local_out net/ipv4/ip_output.c:126 [inline]
                    __ip_queue_xmit+0x905/0x1a20 net/ipv4/ip_output.c:533
                    __tcp_transmit_skb+0x1883/0x38f0 net/ipv4/tcp_output.c:1405
                    tcp_transmit_skb net/ipv4/tcp_output.c:1423 [inline]
                    tcp_write_xmit+0xdee/0x6040 net/ipv4/tcp_output.c:2689
                    __tcp_push_pending_frames+0xaa/0x390 net/ipv4/tcp_output.c:2873
                    tcp_send_fin+0x117/0xbb0 net/ipv4/tcp_output.c:3422
                    __tcp_close+0xaca/0x1170 net/ipv4/tcp.c:2790
                    tcp_close+0x29/0xc0 net/ipv4/tcp.c:2880
                    inet_release+0x12e/0x280 net/ipv4/af_inet.c:431
                    __sock_release+0xcd/0x280 net/socket.c:599
                    sock_close+0x18/0x20 net/socket.c:1245
                    __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:175 [inline]
                    exit_to_user_mode_prepare+0x281/0x290 kernel/entry/common.c:209
                    __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
                    syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
                    do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:57
                    entry_SYSCALL_64_after_hwframe+0x44/0xae
   SOFTIRQ-ON-R at:
                    lock_acquire kernel/locking/lockdep.c:5514 [inline]
                    lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5479
                    __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+0x14b/0x460 fs/fcntl.c:1026
                    sock_wake_async+0xd2/0x160 net/socket.c:1299
                    sk_wake_async include/net/sock.h:2322 [inline]
                    sk_wake_async include/net/sock.h:2318 [inline]
                    sock_def_readable+0x2cb/0x4c0 net/core/sock.c:2920
                    unix_dgram_sendmsg+0xff9/0x1a80 net/unix/af_unix.c:1801
                    sock_sendmsg_nosec net/socket.c:654 [inline]
                    sock_sendmsg+0xcf/0x120 net/socket.c:674
                    ____sys_sendmsg+0x331/0x810 net/socket.c:2337
                    ___sys_sendmsg+0xf3/0x170 net/socket.c:2391
                    __sys_sendmmsg+0x195/0x470 net/socket.c:2477
                    __do_sys_sendmmsg net/socket.c:2506 [inline]
                    __se_sys_sendmmsg net/socket.c:2503 [inline]
                    __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2503
                    do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
                    entry_SYSCALL_64_after_hwframe+0x44/0xae
   INITIAL USE at:
                   lock_acquire kernel/locking/lockdep.c:5514 [inline]
                   lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5479
                   __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
                   sock_fasync+0x94/0x140 net/socket.c:1270
                   __fput+0x712/0x920 fs/file_table.c:277
                   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:175 [inline]
                   exit_to_user_mode_prepare+0x281/0x290 kernel/entry/common.c:209
                   __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
                   syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
                   do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:57
                   entry_SYSCALL_64_after_hwframe+0x44/0xae
   INITIAL READ USE at:
                        lock_acquire kernel/locking/lockdep.c:5514 [inline]
                        lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5479
                        __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+0x14b/0x460 fs/fcntl.c:1026
                        sock_wake_async+0xd2/0x160 net/socket.c:1299
                        sk_wake_async include/net/sock.h:2322 [inline]
                        sk_wake_async include/net/sock.h:2318 [inline]
                        tcp_fin+0x72d/0x970 net/ipv4/tcp_input.c:4348
                        tcp_data_queue+0x20de/0x4b10 net/ipv4/tcp_input.c:4973
                        tcp_rcv_established+0x841/0x1eb0 net/ipv4/tcp_input.c:5881
                        tcp_v4_do_rcv+0x5d1/0x870 net/ipv4/tcp_ipv4.c:1694
                        tcp_v4_rcv+0x3298/0x3950 net/ipv4/tcp_ipv4.c:2077
                        ip_protocol_deliver_rcu+0x5c/0xa20 net/ipv4/ip_input.c:204
                        ip_local_deliver_finish+0x20a/0x370 net/ipv4/ip_input.c:231
                        NF_HOOK include/linux/netfilter.h:301 [inline]
                        NF_HOOK include/linux/netfilter.h:295 [inline]
                        ip_local_deliver+0x1b3/0x200 net/ipv4/ip_input.c:252
                        dst_input include/net/dst.h:458 [inline]
                        ip_rcv_finish+0x1da/0x2f0 net/ipv4/ip_input.c:429
                        NF_HOOK include/linux/netfilter.h:301 [inline]
                        NF_HOOK include/linux/netfilter.h:295 [inline]
                        ip_rcv+0xaa/0xd0 net/ipv4/ip_input.c:540
                        __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5459
                        __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5573
                        process_backlog+0x232/0x6c0 net/core/dev.c:6437
                        __napi_poll+0xaf/0x440 net/core/dev.c:6985
                        napi_poll net/core/dev.c:7052 [inline]
                        net_rx_action+0x801/0xb40 net/core/dev.c:7139
                        __do_softirq+0x29b/0x9f6 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:746 [inline]
                        ip_finish_output2+0x88b/0x21f0 net/ipv4/ip_output.c:231
                        __ip_finish_output net/ipv4/ip_output.c:308 [inline]
                        __ip_finish_output+0x396/0x640 net/ipv4/ip_output.c:290
                        ip_finish_output+0x35/0x200 net/ipv4/ip_output.c:318
                        NF_HOOK_COND include/linux/netfilter.h:290 [inline]
                        ip_output+0x196/0x310 net/ipv4/ip_output.c:432
                        dst_output include/net/dst.h:448 [inline]
                        ip_local_out net/ipv4/ip_output.c:126 [inline]
                        __ip_queue_xmit+0x905/0x1a20 net/ipv4/ip_output.c:533
                        __tcp_transmit_skb+0x1883/0x38f0 net/ipv4/tcp_output.c:1405
                        tcp_transmit_skb net/ipv4/tcp_output.c:1423 [inline]
                        tcp_write_xmit+0xdee/0x6040 net/ipv4/tcp_output.c:2689
                        __tcp_push_pending_frames+0xaa/0x390 net/ipv4/tcp_output.c:2873
                        tcp_send_fin+0x117/0xbb0 net/ipv4/tcp_output.c:3422
                        __tcp_close+0xaca/0x1170 net/ipv4/tcp.c:2790
                        tcp_close+0x29/0xc0 net/ipv4/tcp.c:2880
                        inet_release+0x12e/0x280 net/ipv4/af_inet.c:431
                        __sock_release+0xcd/0x280 net/socket.c:599
                        sock_close+0x18/0x20 net/socket.c:1245
                        __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:175 [inline]
                        exit_to_user_mode_prepare+0x281/0x290 kernel/entry/common.c:209
                        __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
                        syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
                        do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:57
                        entry_SYSCALL_64_after_hwframe+0x44/0xae
 }
 ... key      at: [<ffffffff907e8940>] __key.0+0x0/0x40
 ... acquired at:
   lock_acquire kernel/locking/lockdep.c:5514 [inline]
   lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5479
   __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+0x14b/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+0x28b/0x3f0 drivers/input/evdev.c:306
   input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115
   input_pass_values.part.0+0x284/0x700 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+0x2f5/0x310 drivers/input/input.c:476
   evdev_write+0x430/0x760 drivers/input/evdev.c:530
   vfs_write+0x28e/0xa30 fs/read_write.c:603
   ksys_write+0x1ee/0x250 fs/read_write.c:658
   do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
   entry_SYSCALL_64_after_hwframe+0x44/0xae


stack backtrace:
CPU: 0 PID: 31496 Comm: syz-executor.0 Not tainted 5.13.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x141/0x1d7 lib/dump_stack.c:120
 print_bad_irq_dependency kernel/locking/lockdep.c:2464 [inline]
 check_irq_usage.cold+0x4d6/0x6c5 kernel/locking/lockdep.c:2693
 check_prev_add kernel/locking/lockdep.c:2944 [inline]
 check_prevs_add kernel/locking/lockdep.c:3063 [inline]
 validate_chain kernel/locking/lockdep.c:3678 [inline]
 __lock_acquire+0x2a2f/0x5230 kernel/locking/lockdep.c:4904
 lock_acquire kernel/locking/lockdep.c:5514 [inline]
 lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5479
 __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+0x14b/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+0x28b/0x3f0 drivers/input/evdev.c:306
 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115
 input_pass_values.part.0+0x284/0x700 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+0x2f5/0x310 drivers/input/input.c:476
 evdev_write+0x430/0x760 drivers/input/evdev.c:530
 vfs_write+0x28e/0xa30 fs/read_write.c:603
 ksys_write+0x1ee/0x250 fs/read_write.c:658
 do_syscall_64+0x3a/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:00007feb9375f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000373 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffe2121109f R14: 00007feb9375f300 R15: 0000000000022000

Crashes (12):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2021/06/26 06:22 upstream b7050b242430 9d2ab5df .config log report info possible deadlock in evdev_cleanup
ci-upstream-kasan-gce-smack-root 2021/05/25 14:45 upstream a050a6d2b7e8 3c7fef33 .config log report info possible deadlock in evdev_cleanup
ci-upstream-kasan-gce 2021/04/18 22:50 upstream c98ff1d013d2 7e2b734b .config log report info possible deadlock in evdev_cleanup
ci-upstream-kasan-gce-selinux-root 2021/04/14 01:19 upstream eebe426d32e1 a184b83e .config log report info possible deadlock in evdev_cleanup
ci-upstream-kasan-gce 2021/02/23 17:06 upstream 3b9cdafb5358 fcc6d71b .config log report info possible deadlock in evdev_cleanup
ci-upstream-kasan-gce-smack-root 2021/02/01 08:05 upstream 1048ba83fb1c fc9fd31e .config log report info possible deadlock in evdev_cleanup
ci-upstream-kasan-gce 2021/01/30 19:22 upstream 0e9bcda5d286 fc9fd31e .config log report info possible deadlock in evdev_cleanup
ci-upstream-kasan-gce 2021/01/18 16:44 upstream 19c329f68089 63631df1 .config log report info possible deadlock in evdev_cleanup
ci-upstream-kasan-gce-386 2021/04/01 20:32 upstream ffd9fb546d49 6a81331a .config log report info possible deadlock in evdev_cleanup
ci-upstream-kasan-gce-386 2021/02/28 09:26 upstream 5695e5161974 4c37c133 .config log report info possible deadlock in evdev_cleanup
ci-upstream-kasan-gce-386 2021/02/02 10:32 upstream 88bb507a74ea 19e09687 .config log report info possible deadlock in evdev_cleanup
ci-upstream-kasan-gce-386 2021/01/18 00:22 upstream a1339d6355ac 813be542 .config log report info possible deadlock in evdev_cleanup
* Struck through repros no longer work on HEAD.