syzbot

 sign-in | mailing list | source | docs
🐞 Open [653]
🐞 Fixed [66]
🐞 Invalid [755]
⬇ Missing Backports [79]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

possible deadlock in evdev_pass_values (2)

Status: auto-obsoleted due to no activity on 2024/07/10 03:27
Reported-by: syzbot+203331b8c47767c94980@syzkaller.appspotmail.com
First crash: 357d, last: 280d
▶ ▼ Similar bugs (8)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream possible deadlock in evdev_pass_values fuse kernfs 351 664d 1487d 0/28 closed as dup on 2021/07/02 09:55
linux-5.15 possible deadlock in evdev_pass_values (3) 11 161d 194d 0/3 auto-obsoleted due to no activity on 2024/11/05 23:17
linux-6.1 possible deadlock in evdev_pass_values (3) 17 246d 313d 0/3 auto-obsoleted due to no activity on 2024/08/12 15:10
linux-5.15 possible deadlock in evdev_pass_values (4) 2 1d14h 12d 0/3 upstream: reported on 2025/01/23 21:20
linux-6.1 possible deadlock in evdev_pass_values 1 584d 584d 0/3 auto-obsoleted due to no activity on 2023/10/09 19:52
linux-5.15 possible deadlock in evdev_pass_values 6 461d 565d 0/3 auto-obsoleted due to no activity on 2024/02/09 07:09
upstream possible deadlock in evdev_pass_values (2) input 979 17d 655d 0/28 upstream: reported on 2023/04/21 09:42
linux-6.1 possible deadlock in evdev_pass_values (2) 1 445d 445d 0/3 auto-obsoleted due to no activity on 2024/02/25 22:49

Sample crash report:
=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
5.15.157-syzkaller #0 Not tainted
-----------------------------------------------------
syz-executor.0/22785 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffff88801b638750 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1014 [inline]
ffff88801b638750 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x16a/0x490 fs/fcntl.c:1035

and this task is already holding:
ffff888079cb2028 (&client->buffer_lock){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:363 [inline]
ffff888079cb2028 (&client->buffer_lock){..-.}-{2:2}, at: evdev_pass_values+0xe7/0xb60 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:
 (&client->buffer_lock){..-.}-{2:2}

... which became SOFTIRQ-irq-safe at:
  lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
  __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
  _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
  spin_lock include/linux/spinlock.h:363 [inline]
  evdev_pass_values+0xe7/0xb60 drivers/input/evdev.c:261
  evdev_events+0x198/0x2c0 drivers/input/evdev.c:306
  input_to_handler drivers/input/input.c:126 [inline]
  input_pass_values+0x873/0x1200 drivers/input/input.c:156
  input_handle_event+0xd3d/0x1600 drivers/input/input.c:426
  input_event+0x9d/0xd0 drivers/input/input.c:457
  hidinput_hid_event+0x1137/0x18e0 drivers/hid/hid-input.c:1467
  hid_process_event+0x433/0x580 drivers/hid/hid-core.c:1539
  hid_input_field drivers/hid/hid-core.c:1583 [inline]
  hid_report_raw_event+0xe9e/0x1640 drivers/hid/hid-core.c:1807
  hid_input_report+0x419/0x4d0 drivers/hid/hid-core.c:1874
  hid_irq_in+0x45c/0x690 drivers/hid/usbhid/hid-core.c:284
  __usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1674
  dummy_timer+0x8ad/0x3200 drivers/usb/gadget/udc/dummy_hcd.c:1987
  call_timer_fn+0x16d/0x560 kernel/time/timer.c:1451
  expire_timers kernel/time/timer.c:1496 [inline]
  __run_timers+0x67c/0x890 kernel/time/timer.c:1767
  run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
  __do_softirq+0x3b3/0x93a kernel/softirq.c:558
  invoke_softirq kernel/softirq.c:432 [inline]
  __irq_exit_rcu+0x155/0x240 kernel/softirq.c:637
  irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
  sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
  asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
  finish_lock_switch+0x91/0x100 kernel/sched/core.c:4785
  finish_task_switch+0x134/0x630 kernel/sched/core.c:4902
  context_switch kernel/sched/core.c:5033 [inline]
  __schedule+0x12cc/0x45b0 kernel/sched/core.c:6376
  preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6552
  preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6577
  preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
  __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
  _raw_spin_unlock_irq+0x3c/0x40 kernel/locking/spinlock.c:202
  spin_unlock_irq include/linux/spinlock.h:413 [inline]
  rh_call_control drivers/usb/core/hcd.c:739 [inline]
  rh_urb_enqueue drivers/usb/core/hcd.c:848 [inline]
  usb_hcd_submit_urb+0xa5f/0x1de0 drivers/usb/core/hcd.c:1555
  usb_start_wait_urb+0x10f/0x510 drivers/usb/core/message.c:58
  usb_internal_control_msg drivers/usb/core/message.c:102 [inline]
  usb_control_msg+0x2ad/0x4c0 drivers/usb/core/message.c:153
  get_port_status drivers/usb/core/hub.c:590 [inline]
  hub_ext_port_status+0x108/0x660 drivers/usb/core/hub.c:607
  hub_port_status drivers/usb/core/hub.c:629 [inline]
  port_event drivers/usb/core/hub.c:5648 [inline]
  hub_event+0x86d/0x54c0 drivers/usb/core/hub.c:5822
  process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
  process_scheduled_works kernel/workqueue.c:2373 [inline]
  worker_thread+0xdcf/0x1280 kernel/workqueue.c:2459
  kthread+0x3f6/0x4f0 kernel/kthread.c:334
  ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300

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

... which became SOFTIRQ-irq-unsafe at:
...
  lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
  __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
  _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
  do_wait+0x2a7/0xaf0 kernel/exit.c:1576
  kernel_wait+0xe5/0x230 kernel/exit.c:1766
  call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
  call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166
  process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
  worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
  kthread+0x3f6/0x4f0 kernel/kthread.c:334
  ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300

other info that might help us debug this:

Chain exists of:
  &client->buffer_lock --> &new->fa_lock --> tasklist_lock

 Possible interrupt unsafe locking scenario:

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

 *** DEADLOCK ***

7 locks held by syz-executor.0/22785:
 #0: ffff888148094110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x26d/0x7c0 drivers/input/evdev.c:513
 #1: ffff888019aa0230 (&dev->event_lock#2){-.-.}-{2:2}, at: input_inject_event+0xc0/0x300 drivers/input/input.c:482
 #2: ffffffff8c91fb20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:311
 #3: ffffffff8c91fb20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:311
 #4: ffffffff8c91fb20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:311
 #5: ffff888079cb2028 (&client->buffer_lock){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:363 [inline]
 #5: ffff888079cb2028 (&client->buffer_lock){..-.}-{2:2}, at: evdev_pass_values+0xe7/0xb60 drivers/input/evdev.c:261
 #6: ffffffff8c91fb20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:311

the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
-> (&client->buffer_lock){..-.}-{2:2} {
   IN-SOFTIRQ-W at:
                    lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
                    __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
                    _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
                    spin_lock include/linux/spinlock.h:363 [inline]
                    evdev_pass_values+0xe7/0xb60 drivers/input/evdev.c:261
                    evdev_events+0x198/0x2c0 drivers/input/evdev.c:306
                    input_to_handler drivers/input/input.c:126 [inline]
                    input_pass_values+0x873/0x1200 drivers/input/input.c:156
                    input_handle_event+0xd3d/0x1600 drivers/input/input.c:426
                    input_event+0x9d/0xd0 drivers/input/input.c:457
                    hidinput_hid_event+0x1137/0x18e0 drivers/hid/hid-input.c:1467
                    hid_process_event+0x433/0x580 drivers/hid/hid-core.c:1539
                    hid_input_field drivers/hid/hid-core.c:1583 [inline]
                    hid_report_raw_event+0xe9e/0x1640 drivers/hid/hid-core.c:1807
                    hid_input_report+0x419/0x4d0 drivers/hid/hid-core.c:1874
                    hid_irq_in+0x45c/0x690 drivers/hid/usbhid/hid-core.c:284
                    __usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1674
                    dummy_timer+0x8ad/0x3200 drivers/usb/gadget/udc/dummy_hcd.c:1987
                    call_timer_fn+0x16d/0x560 kernel/time/timer.c:1451
                    expire_timers kernel/time/timer.c:1496 [inline]
                    __run_timers+0x67c/0x890 kernel/time/timer.c:1767
                    run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
                    __do_softirq+0x3b3/0x93a kernel/softirq.c:558
                    invoke_softirq kernel/softirq.c:432 [inline]
                    __irq_exit_rcu+0x155/0x240 kernel/softirq.c:637
                    irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
                    sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
                    asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
                    finish_lock_switch+0x91/0x100 kernel/sched/core.c:4785
                    finish_task_switch+0x134/0x630 kernel/sched/core.c:4902
                    context_switch kernel/sched/core.c:5033 [inline]
                    __schedule+0x12cc/0x45b0 kernel/sched/core.c:6376
                    preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6552
                    preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6577
                    preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
                    __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
                    _raw_spin_unlock_irq+0x3c/0x40 kernel/locking/spinlock.c:202
                    spin_unlock_irq include/linux/spinlock.h:413 [inline]
                    rh_call_control drivers/usb/core/hcd.c:739 [inline]
                    rh_urb_enqueue drivers/usb/core/hcd.c:848 [inline]
                    usb_hcd_submit_urb+0xa5f/0x1de0 drivers/usb/core/hcd.c:1555
                    usb_start_wait_urb+0x10f/0x510 drivers/usb/core/message.c:58
                    usb_internal_control_msg drivers/usb/core/message.c:102 [inline]
                    usb_control_msg+0x2ad/0x4c0 drivers/usb/core/message.c:153
                    get_port_status drivers/usb/core/hub.c:590 [inline]
                    hub_ext_port_status+0x108/0x660 drivers/usb/core/hub.c:607
                    hub_port_status drivers/usb/core/hub.c:629 [inline]
                    port_event drivers/usb/core/hub.c:5648 [inline]
                    hub_event+0x86d/0x54c0 drivers/usb/core/hub.c:5822
                    process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
                    process_scheduled_works kernel/workqueue.c:2373 [inline]
                    worker_thread+0xdcf/0x1280 kernel/workqueue.c:2459
                    kthread+0x3f6/0x4f0 kernel/kthread.c:334
                    ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300
   INITIAL USE at:
                   lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
                   __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
                   _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
                   evdev_set_mask drivers/input/evdev.c:980 [inline]
                   evdev_do_ioctl drivers/input/evdev.c:1117 [inline]
                   evdev_ioctl_handler+0x197f/0x2090 drivers/input/evdev.c:1272
                   vfs_ioctl fs/ioctl.c:51 [inline]
                   __do_sys_ioctl fs/ioctl.c:874 [inline]
                   __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860
                   do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                   do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
                   entry_SYSCALL_64_after_hwframe+0x66/0xd0
 }
 ... key      at: [<ffffffff91752ce0>] evdev_open.__key.23+0x0/0x20

the dependencies between the lock to be acquired
 and SOFTIRQ-irq-unsafe lock:
  -> (tasklist_lock){.+.+}-{2:2} {
     HARDIRQ-ON-R at:
                        lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
                        __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                        _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
                        do_wait+0x2a7/0xaf0 kernel/exit.c:1576
                        kernel_wait+0xe5/0x230 kernel/exit.c:1766
                        call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
                        call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166
                        process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
                        worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
                        kthread+0x3f6/0x4f0 kernel/kthread.c:334
                        ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300
     SOFTIRQ-ON-R at:
                        lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
                        __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                        _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
                        do_wait+0x2a7/0xaf0 kernel/exit.c:1576
                        kernel_wait+0xe5/0x230 kernel/exit.c:1766
                        call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
                        call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166
                        process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
                        worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
                        kthread+0x3f6/0x4f0 kernel/kthread.c:334
                        ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300
     INITIAL USE at:
                       lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
                       __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline]
                       _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:316
                       copy_process+0x22be/0x3ef0 kernel/fork.c:2337
                       kernel_clone+0x210/0x960 kernel/fork.c:2604
                       kernel_thread+0x168/0x1e0 kernel/fork.c:2656
                       rest_init+0x21/0x330 init/main.c:706
                       start_kernel+0x48c/0x540 init/main.c:1140
                       secondary_startup_64_no_verify+0xb1/0xbb
     INITIAL READ USE at:
                            lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
                            __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                            _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
                            do_wait+0x2a7/0xaf0 kernel/exit.c:1576
                            kernel_wait+0xe5/0x230 kernel/exit.c:1766
                            call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
                            call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166
                            process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
                            worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
                            kthread+0x3f6/0x4f0 kernel/kthread.c:334
                            ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300
   }
   ... key      at: [<ffffffff8c60a058>] tasklist_lock+0x18/0x40
   ... acquired at:
   lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
   __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
   _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
   send_sigurg+0xc8/0x380 fs/fcntl.c:851
   sk_send_sigurg+0x6a/0xb0 net/core/sock.c:3128
   queue_oob+0x618/0x8d0 net/unix/af_unix.c:2015
   unix_stream_sendmsg+0xe0a/0x1070 net/unix/af_unix.c:2115
   sock_sendmsg_nosec net/socket.c:704 [inline]
   __sock_sendmsg net/socket.c:716 [inline]
   ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2431
   ___sys_sendmsg+0x252/0x2e0 net/socket.c:2485
   __sys_sendmsg net/socket.c:2514 [inline]
   __do_sys_sendmsg net/socket.c:2523 [inline]
   __se_sys_sendmsg+0x19a/0x260 net/socket.c:2521
   do_syscall_x64 arch/x86/entry/common.c:50 [inline]
   do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
   entry_SYSCALL_64_after_hwframe+0x66/0xd0

 -> (&f->f_owner.lock){...-}-{2:2} {
    IN-SOFTIRQ-R at:
                      lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
                      __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
                      _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
                      send_sigurg+0x25/0x380 fs/fcntl.c:835
                      sk_send_sigurg+0x6a/0xb0 net/core/sock.c:3128
                      tcp_check_urg net/ipv4/tcp_input.c:5609 [inline]
                      tcp_urg+0x2b8/0xb40 net/ipv4/tcp_input.c:5650
                      tcp_rcv_established+0xe33/0x1e20 net/ipv4/tcp_input.c:5984
                      tcp_v6_do_rcv+0x4f2/0x10f0 net/ipv6/tcp_ipv6.c:1526
                      tcp_v6_rcv+0x2220/0x27b0 net/ipv6/tcp_ipv6.c:1767
                      ip6_protocol_deliver_rcu+0x93d/0x12d0 net/ipv6/ip6_input.c:425
                      ip6_input_finish+0xa2/0x130 net/ipv6/ip6_input.c:466
                      NF_HOOK+0x364/0x410 include/linux/netfilter.h:302
                      NF_HOOK+0x364/0x410 include/linux/netfilter.h:302
                      __netif_receive_skb_one_core net/core/dev.c:5485 [inline]
                      __netif_receive_skb+0x1c6/0x530 net/core/dev.c:5599
                      process_backlog+0x363/0x7f0 net/core/dev.c:6476
                      __napi_poll+0xc7/0x440 net/core/dev.c:7035
                      napi_poll net/core/dev.c:7102 [inline]
                      net_rx_action+0x617/0xda0 net/core/dev.c:7192
                      __do_softirq+0x3b3/0x93a kernel/softirq.c:558
                      run_ksoftirqd+0xc1/0x120 kernel/softirq.c:921
                      smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164
                      kthread+0x3f6/0x4f0 kernel/kthread.c:334
                      ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300
    INITIAL USE at:
                     lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
                     __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline]
                     _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:316
                     f_modown+0x38/0x340 fs/fcntl.c:91
                     generic_add_lease fs/locks.c:1900 [inline]
                     generic_setlease+0xf12/0x1390 fs/locks.c:1980
                     vfs_setlease fs/locks.c:2070 [inline]
                     do_fcntl_add_lease fs/locks.c:2091 [inline]
                     fcntl_setlease+0x341/0x3f0 fs/locks.c:2113
                     do_fcntl+0x10a/0x1600 fs/fcntl.c:419
                     __do_sys_fcntl fs/fcntl.c:472 [inline]
                     __se_sys_fcntl+0xd8/0x1b0 fs/fcntl.c:457
                     do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                     do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
                     entry_SYSCALL_64_after_hwframe+0x66/0xd0
    INITIAL READ USE at:
                          lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
                          __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
                          _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
                          send_sigio+0x2f/0x330 fs/fcntl.c:796
                          kill_fasync_rcu fs/fcntl.c:1021 [inline]
                          kill_fasync+0x20c/0x490 fs/fcntl.c:1035
                          fuse_dev_wake_and_unlock+0x34/0x50 fs/fuse/dev.c:214
                          queue_request_and_unlock fs/fuse/dev.c:233 [inline]
                          flush_bg_queue+0x6a3/0x800 fs/fuse/dev.c:268
                          fuse_request_queue_background fs/fuse/dev.c:548 [inline]
                          fuse_simple_background+0x673/0x800 fs/fuse/dev.c:576
                          fuse_file_put+0x178/0x2c0 fs/fuse/file.c:119
                          fuse_priv_ioctl_cleanup fs/fuse/ioctl.c:441 [inline]
                          fuse_fileattr_get+0x539/0x720 fs/fuse/ioctl.c:476
                          vfs_fileattr_get fs/ioctl.c:536 [inline]
                          ioctl_fsgetxattr fs/ioctl.c:744 [inline]
                          do_vfs_ioctl+0x2cd/0x2b70 fs/ioctl.c:846
                          __do_sys_ioctl fs/ioctl.c:872 [inline]
                          __se_sys_ioctl+0x81/0x160 fs/ioctl.c:860
                          do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                          do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
                          entry_SYSCALL_64_after_hwframe+0x66/0xd0
  }
  ... key      at: [<ffffffff91455cc0>] __alloc_file.__key+0x0/0x10
  ... acquired at:
   lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
   __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
   _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
   send_sigio+0x2f/0x330 fs/fcntl.c:796
   kill_fasync_rcu fs/fcntl.c:1021 [inline]
   kill_fasync+0x20c/0x490 fs/fcntl.c:1035
   fuse_dev_wake_and_unlock+0x34/0x50 fs/fuse/dev.c:214
   queue_request_and_unlock fs/fuse/dev.c:233 [inline]
   flush_bg_queue+0x6a3/0x800 fs/fuse/dev.c:268
   fuse_request_queue_background fs/fuse/dev.c:548 [inline]
   fuse_simple_background+0x673/0x800 fs/fuse/dev.c:576
   fuse_file_put+0x178/0x2c0 fs/fuse/file.c:119
   fuse_priv_ioctl_cleanup fs/fuse/ioctl.c:441 [inline]
   fuse_fileattr_get+0x539/0x720 fs/fuse/ioctl.c:476
   vfs_fileattr_get fs/ioctl.c:536 [inline]
   ioctl_fsgetxattr fs/ioctl.c:744 [inline]
   do_vfs_ioctl+0x2cd/0x2b70 fs/ioctl.c:846
   __do_sys_ioctl fs/ioctl.c:872 [inline]
   __se_sys_ioctl+0x81/0x160 fs/ioctl.c:860
   do_syscall_x64 arch/x86/entry/common.c:50 [inline]
   do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
   entry_SYSCALL_64_after_hwframe+0x66/0xd0

-> (&new->fa_lock){....}-{2:2} {
   INITIAL USE at:
                   lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
                   __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline]
                   _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:316
                   fasync_remove_entry+0xfb/0x1d0 fs/fcntl.c:891
                   __fput+0x715/0x890 fs/file_table.c:277
                   task_work_run+0x129/0x1a0 kernel/task_work.c:164
                   tracehook_notify_resume include/linux/tracehook.h:189 [inline]
                   exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:181
                   exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
                   __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
                   syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
                   do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
                   entry_SYSCALL_64_after_hwframe+0x66/0xd0
   INITIAL READ USE at:
                        lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
                        __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
                        _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
                        kill_fasync_rcu fs/fcntl.c:1014 [inline]
                        kill_fasync+0x16a/0x490 fs/fcntl.c:1035
                        fuse_dev_wake_and_unlock+0x34/0x50 fs/fuse/dev.c:214
                        queue_request_and_unlock fs/fuse/dev.c:233 [inline]
                        flush_bg_queue+0x6a3/0x800 fs/fuse/dev.c:268
                        fuse_request_queue_background fs/fuse/dev.c:548 [inline]
                        fuse_simple_background+0x673/0x800 fs/fuse/dev.c:576
                        fuse_file_put+0x178/0x2c0 fs/fuse/file.c:119
                        fuse_priv_ioctl_cleanup fs/fuse/ioctl.c:441 [inline]
                        fuse_fileattr_get+0x539/0x720 fs/fuse/ioctl.c:476
                        vfs_fileattr_get fs/ioctl.c:536 [inline]
                        ioctl_fsgetxattr fs/ioctl.c:744 [inline]
                        do_vfs_ioctl+0x2cd/0x2b70 fs/ioctl.c:846
                        __do_sys_ioctl fs/ioctl.c:872 [inline]
                        __se_sys_ioctl+0x81/0x160 fs/ioctl.c:860
                        do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                        do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
                        entry_SYSCALL_64_after_hwframe+0x66/0xd0
 }
 ... key      at: [<ffffffff91456940>] fasync_insert_entry.__key+0x0/0x20
 ... acquired at:
   lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
   __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
   _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
   kill_fasync_rcu fs/fcntl.c:1014 [inline]
   kill_fasync+0x16a/0x490 fs/fcntl.c:1035
   __pass_event drivers/input/evdev.c:240 [inline]
   evdev_pass_values+0x5ad/0xb60 drivers/input/evdev.c:278
   evdev_events+0x198/0x2c0 drivers/input/evdev.c:306
   input_to_handler drivers/input/input.c:126 [inline]
   input_pass_values+0x873/0x1200 drivers/input/input.c:156
   input_handle_event+0xc9b/0x1600 drivers/input/input.c:415
   input_inject_event+0x1fc/0x300 drivers/input/input.c:487
   evdev_write+0x668/0x7c0 drivers/input/evdev.c:530
   vfs_write+0x30c/0xe50 fs/read_write.c:592
   ksys_write+0x1a2/0x2c0 fs/read_write.c:647
   do_syscall_x64 arch/x86/entry/common.c:50 [inline]
   do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
   entry_SYSCALL_64_after_hwframe+0x66/0xd0


stack backtrace:
CPU: 1 PID: 22785 Comm: syz-executor.0 Not tainted 5.15.157-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 print_bad_irq_dependency kernel/locking/lockdep.c:2567 [inline]
 check_irq_usage kernel/locking/lockdep.c:2806 [inline]
 check_prev_add kernel/locking/lockdep.c:3057 [inline]
 check_prevs_add kernel/locking/lockdep.c:3172 [inline]
 validate_chain+0x4d01/0x5930 kernel/locking/lockdep.c:3788
 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012
 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
 _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
 kill_fasync_rcu fs/fcntl.c:1014 [inline]
 kill_fasync+0x16a/0x490 fs/fcntl.c:1035
 __pass_event drivers/input/evdev.c:240 [inline]
 evdev_pass_values+0x5ad/0xb60 drivers/input/evdev.c:278
 evdev_events+0x198/0x2c0 drivers/input/evdev.c:306
 input_to_handler drivers/input/input.c:126 [inline]
 input_pass_values+0x873/0x1200 drivers/input/input.c:156
 input_handle_event+0xc9b/0x1600 drivers/input/input.c:415
 input_inject_event+0x1fc/0x300 drivers/input/input.c:487
 evdev_write+0x668/0x7c0 drivers/input/evdev.c:530
 vfs_write+0x30c/0xe50 fs/read_write.c:592
 ksys_write+0x1a2/0x2c0 fs/read_write.c:647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fcf28a25ea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fcf26f980c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fcf28b53f80 RCX: 00007fcf28a25ea9
RDX: 0000000000002250 RSI: 0000000020000040 RDI: 0000000000000004
RBP: 00007fcf28a724a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fcf28b53f80 R15: 00007ffd63879b78
 </TASK>

Crashes (22):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/01 03:26 linux-5.15.y b925f60c6ee7 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/29 22:29 linux-5.15.y b925f60c6ee7 f10afd69 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/26 15:28 linux-5.15.y c52b9710c83d 059e9963 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/23 10:41 linux-5.15.y c52b9710c83d 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/22 12:29 linux-5.15.y c52b9710c83d 36c961ad .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/21 15:42 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/18 07:11 linux-5.15.y c52b9710c83d acc528cb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/17 12:49 linux-5.15.y c52b9710c83d 18f6e127 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/15 16:11 linux-5.15.y fa3df276cd36 b9af7e61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/12 03:27 linux-5.15.y cdfd0a7f0139 27de0a5c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/12 03:27 linux-5.15.y cdfd0a7f0139 27de0a5c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/11 07:30 linux-5.15.y cdfd0a7f0139 33b9e058 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/10 16:34 linux-5.15.y cdfd0a7f0139 4320ec32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/10 16:34 linux-5.15.y cdfd0a7f0139 4320ec32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/10 13:41 linux-5.15.y 9465fef4ae35 4320ec32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/09 16:59 linux-5.15.y 9465fef4ae35 f3234354 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/09 03:27 linux-5.15.y 9465fef4ae35 f3234354 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/08 12:53 linux-5.15.y 9465fef4ae35 53df08b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/06 03:08 linux-5.15.y 9465fef4ae35 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/05 08:37 linux-5.15.y 9465fef4ae35 0ee3535e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/04/04 23:58 linux-5.15.y 9465fef4ae35 0ee3535e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
2024/02/13 17:30 linux-5.15.y 6139f2a02fe0 e66542d7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in evdev_pass_values
* Struck through repros no longer work on HEAD.