possible deadlock in evdev_pass

possible deadlock in evdev_pass_values
Status: upstream: reported on 2021/01/09 11:55
Reported-by: syzbot+44ec99f248f7052472f1@syzkaller.appspotmail.com
First crash: 105d, last: 2d16h

Sample crash report:
=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
5.12.0-rc6-syzkaller #0 Not tainted
-----------------------------------------------------
syz-executor.1/24774 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffff8880112f2138 (&f->f_owner.lock){.+.+}-{2:2}, at: send_sigio+0x24/0x370 fs/fcntl.c:795

and this task is already holding:
ffff88802b24b018 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1012 [inline]
ffff88802b24b018 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1033 [inline]
ffff88802b24b018 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x14b/0x460 fs/fcntl.c:1026
which would create a new lock dependency:
 (&new->fa_lock){....}-{2:2} -> (&f->f_owner.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 kernel/locking/lockdep.c:5510 [inline]
  lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5475
  __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
  _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
  spin_lock include/linux/spinlock.h:354 [inline]
  evdev_pass_values.part.0+0xf6/0x970 drivers/input/evdev.c:261
  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_event drivers/input/input.c:446 [inline]
  input_event+0x8e/0xb0 drivers/input/input.c:438
  input_sync include/linux/input.h:450 [inline]
  report_tp_state drivers/input/mouse/bcm5974.c:642 [inline]
  bcm5974_irq_trackpad+0xb8f/0x1020 drivers/input/mouse/bcm5974.c:755
  __usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1656
  usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1726
  dummy_timer+0x11f4/0x32a0 drivers/usb/gadget/udc/dummy_hcd.c:1971
  call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1431
  expire_timers kernel/time/timer.c:1476 [inline]
  __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1745
  __run_timers kernel/time/timer.c:1726 [inline]
  run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1758
  __do_softirq+0x29b/0x9f6 kernel/softirq.c:345
  invoke_softirq kernel/softirq.c:221 [inline]
  __irq_exit_rcu kernel/softirq.c:422 [inline]
  irq_exit_rcu+0x134/0x200 kernel/softirq.c:434
  sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
  asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
  __sanitizer_cov_trace_pc+0x59/0x60 kernel/kcov.c:204
  phys_addr_valid arch/x86/mm/physaddr.h:7 [inline]
  __phys_addr+0x58/0x140 arch/x86/mm/physaddr.c:28
  virt_to_head_page include/linux/mm.h:878 [inline]
  qlink_to_cache mm/kasan/quarantine.c:120 [inline]
  qlist_free_all+0x76/0xc0 mm/kasan/quarantine.c:162
  kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272
  __kasan_slab_alloc+0x7f/0x90 mm/kasan/common.c:437
  kasan_slab_alloc include/linux/kasan.h:223 [inline]
  slab_post_alloc_hook mm/slab.h:516 [inline]
  slab_alloc_node mm/slub.c:2907 [inline]
  kmem_cache_alloc_node+0x164/0x3b0 mm/slub.c:2943
  __alloc_skb+0x20b/0x340 net/core/skbuff.c:412
  alloc_skb include/linux/skbuff.h:1103 [inline]
  alloc_skb_with_frags+0x93/0x5d0 net/core/skbuff.c:5948
  sock_alloc_send_pskb+0x793/0x920 net/core/sock.c:2356
  unix_dgram_sendmsg+0x3d8/0x1a80 net/unix/af_unix.c:1671
  sock_sendmsg_nosec net/socket.c:654 [inline]
  sock_sendmsg+0xcf/0x120 net/socket.c:674
  ____sys_sendmsg+0x331/0x810 net/socket.c:2350
  ___sys_sendmsg+0xf3/0x170 net/socket.c:2404
  __sys_sendmmsg+0x195/0x470 net/socket.c:2490
  __do_sys_sendmmsg net/socket.c:2519 [inline]
  __se_sys_sendmmsg net/socket.c:2516 [inline]
  __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2516
  do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
  entry_SYSCALL_64_after_hwframe+0x44/0xae

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

... which became SOFTIRQ-irq-unsafe at:
...
  lock_acquire kernel/locking/lockdep.c:5510 [inline]
  lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5475
  __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
  _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223
  f_getown+0x23/0x2a0 fs/fcntl.c:153
  sock_ioctl+0x4ba/0x6a0 net/socket.c:1124
  vfs_ioctl fs/ioctl.c:48 [inline]
  __do_sys_ioctl fs/ioctl.c:753 [inline]
  __se_sys_ioctl fs/ioctl.c:739 [inline]
  __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
  do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
  entry_SYSCALL_64_after_hwframe+0x44/0xae

other info that might help us debug this:

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

 Possible interrupt unsafe locking scenario:

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

 *** DEADLOCK ***

8 locks held by syz-executor.1/24774:
 #0: ffff88801c9cf110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x1d3/0x760 drivers/input/evdev.c:513
 #1: ffff8881452b6230 (&dev->event_lock){-.-.}-{2:2}, at: input_inject_event+0xa6/0x310 drivers/input/input.c:471
 #2: ffffffff8bf74320 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:53 [inline]
 #2: ffffffff8bf74320 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:50 [inline]
 #2: ffffffff8bf74320 (rcu_read_lock){....}-{1:2}, at: input_inject_event+0x92/0x310 drivers/input/input.c:470
 #3: ffffffff8bf74320 (rcu_read_lock){....}-{1:2}, at: input_pass_values.part.0+0x0/0x700 drivers/input/input.c:837
 #4: ffffffff8bf74320 (rcu_read_lock){....}-{1:2}, at: evdev_events+0x59/0x3f0 drivers/input/evdev.c:296
 #5: ffff888028fbd028 (&client->buffer_lock){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline]
 #5: ffff888028fbd028 (&client->buffer_lock){..-.}-{2:2}, at: evdev_pass_values.part.0+0xf6/0x970 drivers/input/evdev.c:261
 #6: ffffffff8bf74320 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x3d/0x460 fs/fcntl.c:1031
 #7: ffff88802b24b018 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1012 [inline]
 #7: ffff88802b24b018 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1033 [inline]
 #7: ffff88802b24b018 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x14b/0x460 fs/fcntl.c:1026

the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
 -> (&client->buffer_lock){..-.}-{2:2} {
    IN-SOFTIRQ-W at:
                      lock_acquire kernel/locking/lockdep.c:5510 [inline]
                      lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5475
                      __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
                      _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
                      spin_lock include/linux/spinlock.h:354 [inline]
                      evdev_pass_values.part.0+0xf6/0x970 drivers/input/evdev.c:261
                      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_event drivers/input/input.c:446 [inline]
                      input_event+0x8e/0xb0 drivers/input/input.c:438
                      input_sync include/linux/input.h:450 [inline]
                      report_tp_state drivers/input/mouse/bcm5974.c:642 [inline]
                      bcm5974_irq_trackpad+0xb8f/0x1020 drivers/input/mouse/bcm5974.c:755
                      __usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1656
                      usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1726
                      dummy_timer+0x11f4/0x32a0 drivers/usb/gadget/udc/dummy_hcd.c:1971
                      call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1431
                      expire_timers kernel/time/timer.c:1476 [inline]
                      __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1745
                      __run_timers kernel/time/timer.c:1726 [inline]
                      run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1758
                      __do_softirq+0x29b/0x9f6 kernel/softirq.c:345
                      invoke_softirq kernel/softirq.c:221 [inline]
                      __irq_exit_rcu kernel/softirq.c:422 [inline]
                      irq_exit_rcu+0x134/0x200 kernel/softirq.c:434
                      sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
                      asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
                      __sanitizer_cov_trace_pc+0x59/0x60 kernel/kcov.c:204
                      phys_addr_valid arch/x86/mm/physaddr.h:7 [inline]
                      __phys_addr+0x58/0x140 arch/x86/mm/physaddr.c:28
                      virt_to_head_page include/linux/mm.h:878 [inline]
                      qlink_to_cache mm/kasan/quarantine.c:120 [inline]
                      qlist_free_all+0x76/0xc0 mm/kasan/quarantine.c:162
                      kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272
                      __kasan_slab_alloc+0x7f/0x90 mm/kasan/common.c:437
                      kasan_slab_alloc include/linux/kasan.h:223 [inline]
                      slab_post_alloc_hook mm/slab.h:516 [inline]
                      slab_alloc_node mm/slub.c:2907 [inline]
                      kmem_cache_alloc_node+0x164/0x3b0 mm/slub.c:2943
                      __alloc_skb+0x20b/0x340 net/core/skbuff.c:412
                      alloc_skb include/linux/skbuff.h:1103 [inline]
                      alloc_skb_with_frags+0x93/0x5d0 net/core/skbuff.c:5948
                      sock_alloc_send_pskb+0x793/0x920 net/core/sock.c:2356
                      unix_dgram_sendmsg+0x3d8/0x1a80 net/unix/af_unix.c:1671
                      sock_sendmsg_nosec net/socket.c:654 [inline]
                      sock_sendmsg+0xcf/0x120 net/socket.c:674
                      ____sys_sendmsg+0x331/0x810 net/socket.c:2350
                      ___sys_sendmsg+0xf3/0x170 net/socket.c:2404
                      __sys_sendmmsg+0x195/0x470 net/socket.c:2490
                      __do_sys_sendmmsg net/socket.c:2519 [inline]
                      __se_sys_sendmmsg net/socket.c:2516 [inline]
                      __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2516
                      do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
                      entry_SYSCALL_64_after_hwframe+0x44/0xae
    INITIAL USE at:
                     lock_acquire kernel/locking/lockdep.c:5510 [inline]
                     lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5475
                     __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
                     _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
                     spin_lock include/linux/spinlock.h:354 [inline]
                     evdev_pass_values.part.0+0xf6/0x970 drivers/input/evdev.c:261
                     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_event drivers/input/input.c:446 [inline]
                     input_event+0x8e/0xb0 drivers/input/input.c:438
                     input_sync include/linux/input.h:450 [inline]
                     report_tp_state drivers/input/mouse/bcm5974.c:642 [inline]
                     bcm5974_irq_trackpad+0xb8f/0x1020 drivers/input/mouse/bcm5974.c:755
                     __usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1656
                     usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1726
                     dummy_timer+0x11f4/0x32a0 drivers/usb/gadget/udc/dummy_hcd.c:1971
                     call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1431
                     expire_timers kernel/time/timer.c:1476 [inline]
                     __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1745
                     __run_timers kernel/time/timer.c:1726 [inline]
                     run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1758
                     __do_softirq+0x29b/0x9f6 kernel/softirq.c:345
                     invoke_softirq kernel/softirq.c:221 [inline]
                     __irq_exit_rcu kernel/softirq.c:422 [inline]
                     irq_exit_rcu+0x134/0x200 kernel/softirq.c:434
                     sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
                     asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
                     __sanitizer_cov_trace_pc+0x59/0x60 kernel/kcov.c:204
                     phys_addr_valid arch/x86/mm/physaddr.h:7 [inline]
                     __phys_addr+0x58/0x140 arch/x86/mm/physaddr.c:28
                     virt_to_head_page include/linux/mm.h:878 [inline]
                     qlink_to_cache mm/kasan/quarantine.c:120 [inline]
                     qlist_free_all+0x76/0xc0 mm/kasan/quarantine.c:162
                     kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272
                     __kasan_slab_alloc+0x7f/0x90 mm/kasan/common.c:437
                     kasan_slab_alloc include/linux/kasan.h:223 [inline]
                     slab_post_alloc_hook mm/slab.h:516 [inline]
                     slab_alloc_node mm/slub.c:2907 [inline]
                     kmem_cache_alloc_node+0x164/0x3b0 mm/slub.c:2943
                     __alloc_skb+0x20b/0x340 net/core/skbuff.c:412
                     alloc_skb include/linux/skbuff.h:1103 [inline]
                     alloc_skb_with_frags+0x93/0x5d0 net/core/skbuff.c:5948
                     sock_alloc_send_pskb+0x793/0x920 net/core/sock.c:2356
                     unix_dgram_sendmsg+0x3d8/0x1a80 net/unix/af_unix.c:1671
                     sock_sendmsg_nosec net/socket.c:654 [inline]
                     sock_sendmsg+0xcf/0x120 net/socket.c:674
                     ____sys_sendmsg+0x331/0x810 net/socket.c:2350
                     ___sys_sendmsg+0xf3/0x170 net/socket.c:2404
                     __sys_sendmmsg+0x195/0x470 net/socket.c:2490
                     __do_sys_sendmmsg net/socket.c:2519 [inline]
                     __se_sys_sendmmsg net/socket.c:2516 [inline]
                     __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2516
                     do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
                     entry_SYSCALL_64_after_hwframe+0x44/0xae
  }
  ... key      at: [<ffffffff9014cf20>] __key.4+0x0/0x40
  ... acquired at:
   __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+0x2d/0x70 arch/x86/entry/common.c:46
   entry_SYSCALL_64_after_hwframe+0x44/0xae

-> (&new->fa_lock){....}-{2:2} {
   INITIAL USE at:
                   lock_acquire kernel/locking/lockdep.c:5510 [inline]
                   lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5475
                   __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
                   fsnotify_fasync+0x4d/0x80 fs/notify/group.c:163
                   __fput+0x712/0x920 fs/file_table.c:277
                   task_work_run+0xdd/0x1a0 kernel/task_work.c:140
                   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+0x249/0x250 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
                   entry_SYSCALL_64_after_hwframe+0x44/0xae
   INITIAL READ USE at:
                        lock_acquire kernel/locking/lockdep.c:5510 [inline]
                        lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5475
                        __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+0x2d/0x70 arch/x86/entry/common.c:46
                        entry_SYSCALL_64_after_hwframe+0x44/0xae
 }
 ... key      at: [<ffffffff8fe97140>] __key.0+0x0/0x40
 ... acquired at:
   lock_acquire kernel/locking/lockdep.c:5510 [inline]
   lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5475
   __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
   _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:231
   send_sigio+0x24/0x370 fs/fcntl.c:795
   kill_fasync_rcu fs/fcntl.c:1019 [inline]
   kill_fasync fs/fcntl.c:1033 [inline]
   kill_fasync+0x205/0x460 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+0x2d/0x70 arch/x86/entry/common.c:46
   entry_SYSCALL_64_after_hwframe+0x44/0xae


the dependencies between the lock to be acquired
 and SOFTIRQ-irq-unsafe lock:
-> (&f->f_owner.lock){.+.+}-{2:2} {
   HARDIRQ-ON-R at:
                    lock_acquire kernel/locking/lockdep.c:5510 [inline]
                    lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5475
                    __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                    _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223
                    f_getown+0x23/0x2a0 fs/fcntl.c:153
                    sock_ioctl+0x4ba/0x6a0 net/socket.c:1124
                    vfs_ioctl fs/ioctl.c:48 [inline]
                    __do_sys_ioctl fs/ioctl.c:753 [inline]
                    __se_sys_ioctl fs/ioctl.c:739 [inline]
                    __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
                    do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
                    entry_SYSCALL_64_after_hwframe+0x44/0xae
   SOFTIRQ-ON-R at:
                    lock_acquire kernel/locking/lockdep.c:5510 [inline]
                    lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5475
                    __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                    _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223
                    f_getown+0x23/0x2a0 fs/fcntl.c:153
                    sock_ioctl+0x4ba/0x6a0 net/socket.c:1124
                    vfs_ioctl fs/ioctl.c:48 [inline]
                    __do_sys_ioctl fs/ioctl.c:753 [inline]
                    __se_sys_ioctl fs/ioctl.c:739 [inline]
                    __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
                    do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
                    entry_SYSCALL_64_after_hwframe+0x44/0xae
   INITIAL USE at:
                   lock_acquire kernel/locking/lockdep.c:5510 [inline]
                   lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5475
                   __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline]
                   _raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:311
                   f_modown+0x2a/0x390 fs/fcntl.c:91
                   __f_setown fs/fcntl.c:110 [inline]
                   f_setown+0xf4/0x230 fs/fcntl.c:138
                   sock_ioctl+0x1de/0x6a0 net/socket.c:1120
                   vfs_ioctl fs/ioctl.c:48 [inline]
                   __do_sys_ioctl fs/ioctl.c:753 [inline]
                   __se_sys_ioctl fs/ioctl.c:739 [inline]
                   __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
                   do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
                   entry_SYSCALL_64_after_hwframe+0x44/0xae
   INITIAL READ USE at:
                        lock_acquire kernel/locking/lockdep.c:5510 [inline]
                        lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5475
                        __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                        _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223
                        f_getown+0x23/0x2a0 fs/fcntl.c:153
                        sock_ioctl+0x4ba/0x6a0 net/socket.c:1124
                        vfs_ioctl fs/ioctl.c:48 [inline]
                        __do_sys_ioctl fs/ioctl.c:753 [inline]
                        __se_sys_ioctl fs/ioctl.c:739 [inline]
                        __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
                        do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
                        entry_SYSCALL_64_after_hwframe+0x44/0xae
 }
 ... key      at: [<ffffffff8fe96360>] __key.5+0x0/0x40
 ... acquired at:
   lock_acquire kernel/locking/lockdep.c:5510 [inline]
   lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5475
   __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
   _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:231
   send_sigio+0x24/0x370 fs/fcntl.c:795
   kill_fasync_rcu fs/fcntl.c:1019 [inline]
   kill_fasync fs/fcntl.c:1033 [inline]
   kill_fasync+0x205/0x460 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+0x2d/0x70 arch/x86/entry/common.c:46
   entry_SYSCALL_64_after_hwframe+0x44/0xae


stack backtrace:
CPU: 1 PID: 24774 Comm: syz-executor.1 Not tainted 5.12.0-rc6-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:2460 [inline]
 check_irq_usage.cold+0x50d/0x744 kernel/locking/lockdep.c:2689
 check_prev_add kernel/locking/lockdep.c:2940 [inline]
 check_prevs_add kernel/locking/lockdep.c:3059 [inline]
 validate_chain kernel/locking/lockdep.c:3674 [inline]
 __lock_acquire+0x2b2c/0x54c0 kernel/locking/lockdep.c:4900
 lock_acquire kernel/locking/lockdep.c:5510 [inline]
 lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5475
 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
 _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:231
 send_sigio+0x24/0x370 fs/fcntl.c:795
 kill_fasync_rcu fs/fcntl.c:1019 [inline]
 kill_fasync fs/fcntl.c:1033 [inline]
 kill_fasync+0x205/0x460 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+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x466459
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:00007f2ecabdb188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
RDX: 0000000000000373 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 0000000000a9fb1f R14: 00007f2ecabdb300 R15: 0000000000022000
Crashes (5):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci-upstream-kasan-gce	2021/04/10 10:40	upstream	d4961772	bfeda1b1	.config	log	report	info	possible deadlock in evdev_pass_values
ci-upstream-kasan-gce-386	2021/04/18 14:44	upstream	c98ff1d0	7e2b734b	.config	log	report	info	possible deadlock in evdev_pass_values
ci-upstream-kasan-gce	2021/01/06 03:00	upstream	6207214a	b1c228e1	.config	log	report	info
ci-upstream-kasan-gce	2021/01/05 11:44	upstream	36bbbd0e	a0234d98	.config	log	report	info
ci-upstream-kasan-gce-386	2021/01/09 01:30	upstream	6279d812	c104d4a3	.config	log	report	info