syzbot


possible deadlock in evdev_pass_values (2)

Status: auto-obsoleted due to no activity on 2024/02/25 22:49
Reported-by: syzbot+28de978c4139bbdfff8f@syzkaller.appspotmail.com
First crash: 208d, last: 208d
Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream possible deadlock in evdev_pass_values fuse kernfs 351 428d 1251d 0/28 closed as dup on 2021/07/02 09:55
linux-6.1 possible deadlock in evdev_pass_values (3) 17 10d 76d 0/3 upstream: reported on 2024/03/28 21:07
linux-6.1 possible deadlock in evdev_pass_values 1 348d 348d 0/3 auto-obsoleted due to no activity on 2023/10/09 19:52
linux-5.15 possible deadlock in evdev_pass_values 6 225d 329d 0/3 auto-obsoleted due to no activity on 2024/02/09 07:09
upstream possible deadlock in evdev_pass_values (2) input 649 1d00h 419d 0/28 upstream: reported on 2023/04/21 09:42
linux-5.15 possible deadlock in evdev_pass_values (2) 22 43d 121d 0/3 upstream: reported on 2024/02/13 17:30

Sample crash report:
=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
6.1.62-syzkaller #0 Not tainted
-----------------------------------------------------
syz-executor.5/10741 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffff888077937600 (&new->fa_lock){...-}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:996 [inline]
ffff888077937600 (&new->fa_lock){...-}-{2:2}, at: kill_fasync+0x196/0x4d0 fs/fcntl.c:1017

and this task is already holding:
ffff8880293ae028 (&client->buffer_lock){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline]
ffff8880293ae028 (&client->buffer_lock){..-.}-{2:2}, at: evdev_pass_values+0xee/0xad0 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+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
  __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
  _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
  spin_lock include/linux/spinlock.h:350 [inline]
  evdev_pass_values+0xee/0xad0 drivers/input/evdev.c:261
  evdev_events+0x1be/0x2f0 drivers/input/evdev.c:306
  input_to_handler drivers/input/input.c:127 [inline]
  input_pass_values+0x8e0/0x12a0 drivers/input/input.c:159
  input_event_dispose+0x3fc/0x650 drivers/input/input.c:385
  input_handle_event+0x97d/0xb00 drivers/input/input.c:402
  input_event+0xa0/0xd0 drivers/input/input.c:431
  hidinput_hid_event+0x13de/0x1d30 drivers/hid/hid-input.c:1706
  hid_process_event+0x433/0x580 drivers/hid/hid-core.c:1537
  hid_process_report drivers/hid/hid-core.c:1685 [inline]
  hid_report_raw_event+0xfd5/0x17e0 drivers/hid/hid-core.c:2012
  hid_input_report+0x420/0x4e0 drivers/hid/hid-core.c:2080
  hid_irq_in+0x45c/0x690 drivers/hid/usbhid/hid-core.c:284
  __usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1675
  dummy_timer+0x8ad/0x3200 drivers/usb/gadget/udc/dummy_hcd.c:1988
  call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1474
  expire_timers kernel/time/timer.c:1519 [inline]
  __run_timers+0x67c/0x890 kernel/time/timer.c:1790
  run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803
  __do_softirq+0x2e9/0xa4c kernel/softirq.c:571
  invoke_softirq kernel/softirq.c:445 [inline]
  __irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
  irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
  sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
  asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
  do_sys_openat2+0xc5/0x500
  do_sys_open fs/open.c:1334 [inline]
  __do_sys_openat fs/open.c:1350 [inline]
  __se_sys_openat fs/open.c:1345 [inline]
  __x64_sys_openat+0x243/0x290 fs/open.c:1345
  do_syscall_x64 arch/x86/entry/common.c:50 [inline]
  do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
  entry_SYSCALL_64_after_hwframe+0x63/0xcd

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

... which became SOFTIRQ-irq-unsafe at:
...
  lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
  __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
  _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
  do_wait+0x2c6/0xb80 kernel/exit.c:1602
  kernel_wait+0xe5/0x230 kernel/exit.c:1792
  call_usermodehelper_exec_sync kernel/umh.c:140 [inline]
  call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:167
  process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
  worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
  kthread+0x28d/0x320 kernel/kthread.c:376
  ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

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.5/10741:
 #0: ffff8881463c1110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x26d/0x7c0 drivers/input/evdev.c:513
 #1: ffff888140baa230 (&dev->event_lock#2){-.-.}-{2:2}, at: input_inject_event+0xc1/0x330 drivers/input/input.c:456
 #2: ffffffff8d12a060 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:306 [inline]
 #2: ffffffff8d12a060 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
 #2: ffffffff8d12a060 (rcu_read_lock){....}-{1:2}, at: input_inject_event+0xd1/0x330 drivers/input/input.c:458
 #3: ffffffff8d12a060 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:306 [inline]
 #3: ffffffff8d12a060 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
 #3: ffffffff8d12a060 (rcu_read_lock){....}-{1:2}, at: input_pass_values+0xa3/0x12a0 drivers/input/input.c:151
 #4: ffffffff8d12a060 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:306 [inline]
 #4: ffffffff8d12a060 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
 #4: ffffffff8d12a060 (rcu_read_lock){....}-{1:2}, at: evdev_events+0x6b/0x2f0 drivers/input/evdev.c:298
 #5: ffff8880293ae028 (&client->buffer_lock){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline]
 #5: ffff8880293ae028 (&client->buffer_lock){..-.}-{2:2}, at: evdev_pass_values+0xee/0xad0 drivers/input/evdev.c:261
 #6: ffffffff8d12a060 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:306 [inline]
 #6: ffffffff8d12a060 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
 #6: ffffffff8d12a060 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x51/0x4d0 fs/fcntl.c:1016

the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
-> (&client->buffer_lock){..-.}-{2:2} {
   IN-SOFTIRQ-W at:
                    lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
                    __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
                    _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
                    spin_lock include/linux/spinlock.h:350 [inline]
                    evdev_pass_values+0xee/0xad0 drivers/input/evdev.c:261
                    evdev_events+0x1be/0x2f0 drivers/input/evdev.c:306
                    input_to_handler drivers/input/input.c:127 [inline]
                    input_pass_values+0x8e0/0x12a0 drivers/input/input.c:159
                    input_event_dispose+0x3fc/0x650 drivers/input/input.c:385
                    input_handle_event+0x97d/0xb00 drivers/input/input.c:402
                    input_event+0xa0/0xd0 drivers/input/input.c:431
                    hidinput_hid_event+0x13de/0x1d30 drivers/hid/hid-input.c:1706
                    hid_process_event+0x433/0x580 drivers/hid/hid-core.c:1537
                    hid_process_report drivers/hid/hid-core.c:1685 [inline]
                    hid_report_raw_event+0xfd5/0x17e0 drivers/hid/hid-core.c:2012
                    hid_input_report+0x420/0x4e0 drivers/hid/hid-core.c:2080
                    hid_irq_in+0x45c/0x690 drivers/hid/usbhid/hid-core.c:284
                    __usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1675
                    dummy_timer+0x8ad/0x3200 drivers/usb/gadget/udc/dummy_hcd.c:1988
                    call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1474
                    expire_timers kernel/time/timer.c:1519 [inline]
                    __run_timers+0x67c/0x890 kernel/time/timer.c:1790
                    run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803
                    __do_softirq+0x2e9/0xa4c kernel/softirq.c:571
                    invoke_softirq kernel/softirq.c:445 [inline]
                    __irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
                    irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
                    sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
                    asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
                    do_sys_openat2+0xc5/0x500
                    do_sys_open fs/open.c:1334 [inline]
                    __do_sys_openat fs/open.c:1350 [inline]
                    __se_sys_openat fs/open.c:1345 [inline]
                    __x64_sys_openat+0x243/0x290 fs/open.c:1345
                    do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                    do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
                    entry_SYSCALL_64_after_hwframe+0x63/0xcd
   INITIAL USE at:
                   lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
                   __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
                   _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
                   spin_lock include/linux/spinlock.h:350 [inline]
                   evdev_pass_values+0xee/0xad0 drivers/input/evdev.c:261
                   evdev_events+0x1be/0x2f0 drivers/input/evdev.c:306
                   input_to_handler drivers/input/input.c:127 [inline]
                   input_pass_values+0x8e0/0x12a0 drivers/input/input.c:159
                   input_event_dispose+0x3fc/0x650 drivers/input/input.c:385
                   input_handle_event+0x97d/0xb00 drivers/input/input.c:402
                   input_event+0xa0/0xd0 drivers/input/input.c:431
                   hidinput_hid_event+0x13de/0x1d30 drivers/hid/hid-input.c:1706
                   hid_process_event+0x433/0x580 drivers/hid/hid-core.c:1537
                   hid_process_report drivers/hid/hid-core.c:1685 [inline]
                   hid_report_raw_event+0xfd5/0x17e0 drivers/hid/hid-core.c:2012
                   hid_input_report+0x420/0x4e0 drivers/hid/hid-core.c:2080
                   hid_irq_in+0x45c/0x690 drivers/hid/usbhid/hid-core.c:284
                   __usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1675
                   dummy_timer+0x8ad/0x3200 drivers/usb/gadget/udc/dummy_hcd.c:1988
                   call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1474
                   expire_timers kernel/time/timer.c:1519 [inline]
                   __run_timers+0x67c/0x890 kernel/time/timer.c:1790
                   run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803
                   __do_softirq+0x2e9/0xa4c kernel/softirq.c:571
                   invoke_softirq kernel/softirq.c:445 [inline]
                   __irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
                   irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
                   sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
                   asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
                   do_sys_openat2+0xc5/0x500
                   do_sys_open fs/open.c:1334 [inline]
                   __do_sys_openat fs/open.c:1350 [inline]
                   __se_sys_openat fs/open.c:1345 [inline]
                   __x64_sys_openat+0x243/0x290 fs/open.c:1345
                   do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                   do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
                   entry_SYSCALL_64_after_hwframe+0x63/0xcd
 }
 ... key      at: [<ffffffff92048520>] evdev_open.__key.25+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+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
                        __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
                        _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
                        do_wait+0x2c6/0xb80 kernel/exit.c:1602
                        kernel_wait+0xe5/0x230 kernel/exit.c:1792
                        call_usermodehelper_exec_sync kernel/umh.c:140 [inline]
                        call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:167
                        process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
                        worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
                        kthread+0x28d/0x320 kernel/kthread.c:376
                        ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
     SOFTIRQ-ON-R at:
                        lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
                        __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
                        _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
                        do_wait+0x2c6/0xb80 kernel/exit.c:1602
                        kernel_wait+0xe5/0x230 kernel/exit.c:1792
                        call_usermodehelper_exec_sync kernel/umh.c:140 [inline]
                        call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:167
                        process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
                        worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
                        kthread+0x28d/0x320 kernel/kthread.c:376
                        ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
     INITIAL USE at:
                       lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
                       __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
                       _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:326
                       copy_process+0x24b6/0x4060 kernel/fork.c:2401
                       kernel_clone+0x222/0x920 kernel/fork.c:2682
                       user_mode_thread+0x12e/0x190 kernel/fork.c:2758
                       rest_init+0x23/0x300 init/main.c:692
                       start_kernel+0x0/0x53f init/main.c:887
                       start_kernel+0x496/0x53f init/main.c:1134
                       secondary_startup_64_no_verify+0xcf/0xdb
     INITIAL READ USE at:
                            lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
                            __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
                            _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
                            do_wait+0x2c6/0xb80 kernel/exit.c:1602
                            kernel_wait+0xe5/0x230 kernel/exit.c:1792
                            call_usermodehelper_exec_sync kernel/umh.c:140 [inline]
                            call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:167
                            process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
                            worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
                            kthread+0x28d/0x320 kernel/kthread.c:376
                            ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
   }
   ... key      at: [<ffffffff8ce0a058>] tasklist_lock+0x18/0x40
   ... acquired at:
   lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
   __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
   _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
   send_sigurg+0xea/0x3b0 fs/fcntl.c:833
   sk_send_sigurg+0x6a/0xb0 net/core/sock.c:3353
   tcp_check_urg+0x202/0x740 net/ipv4/tcp_input.c:5633
   tcp_urg+0x154/0x440 net/ipv4/tcp_input.c:5674
   tcp_rcv_established+0xe58/0x1f00 net/ipv4/tcp_input.c:6021
   tcp_v6_do_rcv+0x53c/0x1270 net/ipv6/tcp_ipv6.c:1489
   sk_backlog_rcv include/net/sock.h:1117 [inline]
   __release_sock+0x198/0x4b0 net/core/sock.c:2926
   release_sock+0x5d/0x1c0 net/core/sock.c:3490
   tcp_sendmsg+0x36/0x40 net/ipv4/tcp.c:1489
   sock_sendmsg_nosec net/socket.c:716 [inline]
   __sock_sendmsg net/socket.c:728 [inline]
   __sys_sendto+0x471/0x5f0 net/socket.c:2134
   __do_sys_sendto net/socket.c:2146 [inline]
   __se_sys_sendto net/socket.c:2142 [inline]
   __x64_sys_sendto+0xda/0xf0 net/socket.c:2142
   do_syscall_x64 arch/x86/entry/common.c:50 [inline]
   do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
   entry_SYSCALL_64_after_hwframe+0x63/0xcd

 -> (&f->f_owner.lock){...-}-{2:2} {
    IN-SOFTIRQ-R at:
                      lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
                      __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
                      _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
                      send_sigurg+0x25/0x3b0 fs/fcntl.c:817
                      sk_send_sigurg+0x6a/0xb0 net/core/sock.c:3353
                      tcp_check_urg+0x202/0x740 net/ipv4/tcp_input.c:5633
                      tcp_urg+0x154/0x440 net/ipv4/tcp_input.c:5674
                      tcp_rcv_established+0xe58/0x1f00 net/ipv4/tcp_input.c:6021
                      tcp_v4_do_rcv+0x487/0xb00 net/ipv4/tcp_ipv4.c:1677
                      tcp_v4_rcv+0x29e0/0x3250 net/ipv4/tcp_ipv4.c:2099
                      ip_protocol_deliver_rcu+0x381/0x740 net/ipv4/ip_input.c:205
                      ip_local_deliver_finish+0x2b4/0x4f0 net/ipv4/ip_input.c:233
                      NF_HOOK+0x39d/0x450 include/linux/netfilter.h:302
                      NF_HOOK+0x39d/0x450 include/linux/netfilter.h:302
                      __netif_receive_skb_one_core net/core/dev.c:5525 [inline]
                      __netif_receive_skb+0x1c6/0x530 net/core/dev.c:5639
                      process_backlog+0x381/0x760 net/core/dev.c:5967
                      __napi_poll+0xc7/0x470 net/core/dev.c:6534
                      napi_poll net/core/dev.c:6601 [inline]
                      net_rx_action+0x70f/0xeb0 net/core/dev.c:6712
                      __do_softirq+0x2e9/0xa4c kernel/softirq.c:571
                      run_ksoftirqd+0xc1/0x120 kernel/softirq.c:934
                      smpboot_thread_fn+0x52c/0xa30 kernel/smpboot.c:164
                      kthread+0x28d/0x320 kernel/kthread.c:376
                      ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
    INITIAL USE at:
                     lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
                     __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
                     _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:326
                     f_modown+0x38/0x340 fs/fcntl.c:91
                     __f_setown fs/fcntl.c:110 [inline]
                     f_setown+0x14c/0x200 fs/fcntl.c:138
                     sock_ioctl+0x58d/0x770 net/socket.c:1251
                     vfs_ioctl fs/ioctl.c:51 [inline]
                     __do_sys_ioctl fs/ioctl.c:870 [inline]
                     __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856
                     do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                     do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
                     entry_SYSCALL_64_after_hwframe+0x63/0xcd
    INITIAL READ USE at:
                          lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
                          __raw_read_lock_irq include/linux/rwlock_api_smp.h:169 [inline]
                          _raw_read_lock_irq+0xd6/0x120 kernel/locking/spinlock.c:244
                          f_getown+0x25/0x280 fs/fcntl.c:154
                          sock_ioctl+0x3ee/0x770 net/socket.c:1255
                          vfs_ioctl fs/ioctl.c:51 [inline]
                          __do_sys_ioctl fs/ioctl.c:870 [inline]
                          __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856
                          do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                          do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
                          entry_SYSCALL_64_after_hwframe+0x63/0xcd
  }
  ... key      at: [<ffffffff91d4e400>] __alloc_file.__key+0x0/0x10
  ... acquired at:
   lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
   __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
   _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
   send_sigio+0x2f/0x360 fs/fcntl.c:778
   kill_fasync_rcu fs/fcntl.c:1003 [inline]
   kill_fasync+0x232/0x4d0 fs/fcntl.c:1017
   pipe_release+0x1be/0x320 fs/pipe.c:730
   __fput+0x3b7/0x890 fs/file_table.c:320
   task_work_run+0x246/0x300 kernel/task_work.c:179
   resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
   exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:171
   exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
   __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
   syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297
   do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
   entry_SYSCALL_64_after_hwframe+0x63/0xcd

-> (&new->fa_lock){...-}-{2:2} {
   IN-SOFTIRQ-R at:
                    lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
                    __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
                    _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
                    kill_fasync_rcu fs/fcntl.c:996 [inline]
                    kill_fasync+0x196/0x4d0 fs/fcntl.c:1017
                    sock_wake_async+0x145/0x170
                    sk_wake_async+0x186/0x280 include/net/sock.h:2566
                    sock_def_readable+0x1a7/0x280 net/core/sock.c:3297
                    tcp_data_queue+0x21c5/0x6fd0 net/ipv4/tcp_input.c:5098
                    tcp_rcv_established+0xe63/0x1f00 net/ipv4/tcp_input.c:6024
                    tcp_v4_do_rcv+0x487/0xb00 net/ipv4/tcp_ipv4.c:1677
                    tcp_v4_rcv+0x29e0/0x3250 net/ipv4/tcp_ipv4.c:2099
                    ip_protocol_deliver_rcu+0x381/0x740 net/ipv4/ip_input.c:205
                    ip_local_deliver_finish+0x2b4/0x4f0 net/ipv4/ip_input.c:233
                    NF_HOOK+0x39d/0x450 include/linux/netfilter.h:302
                    NF_HOOK+0x39d/0x450 include/linux/netfilter.h:302
                    __netif_receive_skb_one_core net/core/dev.c:5525 [inline]
                    __netif_receive_skb+0x1c6/0x530 net/core/dev.c:5639
                    process_backlog+0x381/0x760 net/core/dev.c:5967
                    __napi_poll+0xc7/0x470 net/core/dev.c:6534
                    napi_poll net/core/dev.c:6601 [inline]
                    net_rx_action+0x70f/0xeb0 net/core/dev.c:6712
                    __do_softirq+0x2e9/0xa4c kernel/softirq.c:571
                    run_ksoftirqd+0xc1/0x120 kernel/softirq.c:934
                    smpboot_thread_fn+0x52c/0xa30 kernel/smpboot.c:164
                    kthread+0x28d/0x320 kernel/kthread.c:376
                    ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
   INITIAL USE at:
                   lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
                   __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
                   _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:326
                   fasync_remove_entry+0xfb/0x1d0 fs/fcntl.c:873
                   sock_fasync+0x86/0xf0 net/socket.c:1412
                   __fput+0x70d/0x890 fs/file_table.c:317
                   task_work_run+0x246/0x300 kernel/task_work.c:179
                   resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
                   exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:171
                   exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
                   __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
                   syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297
                   do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
                   entry_SYSCALL_64_after_hwframe+0x63/0xcd
   INITIAL READ USE at:
                        lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
                        __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
                        _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
                        kill_fasync_rcu fs/fcntl.c:996 [inline]
                        kill_fasync+0x196/0x4d0 fs/fcntl.c:1017
                        pipe_release+0x1be/0x320 fs/pipe.c:730
                        __fput+0x3b7/0x890 fs/file_table.c:320
                        task_work_run+0x246/0x300 kernel/task_work.c:179
                        resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
                        exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:171
                        exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
                        __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
                        syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297
                        do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
                        entry_SYSCALL_64_after_hwframe+0x63/0xcd
 }
 ... key      at: [<ffffffff91d4f080>] fasync_insert_entry.__key+0x0/0x20
 ... acquired at:
   lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
   __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
   _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
   kill_fasync_rcu fs/fcntl.c:996 [inline]
   kill_fasync+0x196/0x4d0 fs/fcntl.c:1017
   __pass_event drivers/input/evdev.c:240 [inline]
   evdev_pass_values+0x586/0xad0 drivers/input/evdev.c:278
   evdev_events+0x1be/0x2f0 drivers/input/evdev.c:306
   input_to_handler drivers/input/input.c:127 [inline]
   input_pass_values+0x8e0/0x12a0 drivers/input/input.c:159
   input_event_dispose+0x366/0x650 drivers/input/input.c:374
   input_handle_event+0x97d/0xb00 drivers/input/input.c:402
   input_inject_event+0x224/0x330 drivers/input/input.c:461
   evdev_write+0x668/0x7c0 drivers/input/evdev.c:530
   vfs_write+0x2d9/0xba0 fs/read_write.c:582
   ksys_write+0x19c/0x2c0 fs/read_write.c:637
   do_syscall_x64 arch/x86/entry/common.c:50 [inline]
   do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
   entry_SYSCALL_64_after_hwframe+0x63/0xcd


stack backtrace:
CPU: 0 PID: 10741 Comm: syz-executor.5 Not tainted 6.1.62-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_bad_irq_dependency kernel/locking/lockdep.c:2604 [inline]
 check_irq_usage kernel/locking/lockdep.c:2843 [inline]
 check_prev_add kernel/locking/lockdep.c:3094 [inline]
 check_prevs_add kernel/locking/lockdep.c:3209 [inline]
 validate_chain+0x4d2e/0x58e0 kernel/locking/lockdep.c:3824
 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5048
 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
 _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
 kill_fasync_rcu fs/fcntl.c:996 [inline]
 kill_fasync+0x196/0x4d0 fs/fcntl.c:1017
 __pass_event drivers/input/evdev.c:240 [inline]
 evdev_pass_values+0x586/0xad0 drivers/input/evdev.c:278
 evdev_events+0x1be/0x2f0 drivers/input/evdev.c:306
 input_to_handler drivers/input/input.c:127 [inline]
 input_pass_values+0x8e0/0x12a0 drivers/input/input.c:159
 input_event_dispose+0x366/0x650 drivers/input/input.c:374
 input_handle_event+0x97d/0xb00 drivers/input/input.c:402
 input_inject_event+0x224/0x330 drivers/input/input.c:461
 evdev_write+0x668/0x7c0 drivers/input/evdev.c:530
 vfs_write+0x2d9/0xba0 fs/read_write.c:582
 ksys_write+0x19c/0x2c0 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fd352c7cae9
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:00007fd3539b60c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd352d9bf80 RCX: 00007fd352c7cae9
RDX: 0000000000000373 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007fd352cc847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fd352d9bf80 R15: 00007fffc60e6688
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/11/17 22:49 linux-6.1.y fb2635ac69ab cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan possible deadlock in evdev_pass_values
* Struck through repros no longer work on HEAD.