===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 6.2.0-rc4-syzkaller-00041-gc1649ec55708 #0 Not tainted ----------------------------------------------------- syz-executor.5/30085 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffff88807c9798a0 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:996 [inline] ffff88807c9798a0 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1017 [inline] ffff88807c9798a0 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x13a/0x480 fs/fcntl.c:1010 and this task is already holding: ffff88807b3fe028 (&client->buffer_lock){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline] ffff88807b3fe028 (&client->buffer_lock){..-.}-{2:2}, at: evdev_pass_values.part.0+0xf6/0x960 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 kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:350 [inline] evdev_pass_values.part.0+0xf6/0x960 drivers/input/evdev.c:261 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x35d/0x3e0 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:128 input_pass_values.part.0+0x230/0x710 drivers/input/input.c:160 input_pass_values drivers/input/input.c:149 [inline] input_event_dispose+0x537/0x730 drivers/input/input.c:386 input_handle_event+0x120/0xe70 drivers/input/input.c:403 input_event drivers/input/input.c:432 [inline] input_event+0x83/0xa0 drivers/input/input.c:424 hidinput_hid_event+0xa2a/0x2010 drivers/hid/hid-input.c:1649 hid_process_event+0x491/0x570 drivers/hid/hid-core.c:1530 hid_process_report drivers/hid/hid-core.c:1678 [inline] hid_report_raw_event+0x9fa/0x1270 drivers/hid/hid-core.c:2001 hid_input_report+0x363/0x4d0 drivers/hid/hid-core.c:2069 hid_irq_in+0x50f/0x690 drivers/hid/usbhid/hid-core.c:284 __usb_hcd_giveback_urb+0x2b6/0x5c0 drivers/usb/core/hcd.c:1671 usb_hcd_giveback_urb+0x384/0x430 drivers/usb/core/hcd.c:1754 dummy_timer+0x1203/0x32d0 drivers/usb/gadget/udc/dummy_hcd.c:1988 call_timer_fn+0x1da/0x7c0 kernel/time/timer.c:1700 expire_timers+0x2c6/0x5c0 kernel/time/timer.c:1751 __run_timers kernel/time/timer.c:2022 [inline] __run_timers kernel/time/timer.c:1995 [inline] run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035 __do_softirq+0x1fb/0xadc kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1107 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649 native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline] acpi_idle_do_entry+0x1fd/0x2a0 drivers/acpi/processor_idle.c:570 acpi_idle_enter+0x368/0x510 drivers/acpi/processor_idle.c:707 cpuidle_enter_state+0x1af/0xd40 drivers/cpuidle/cpuidle.c:239 cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:356 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x3f7/0x590 kernel/sched/idle.c:303 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:400 start_secondary+0x256/0x300 arch/x86/kernel/smpboot.c:264 secondary_startup_64_no_verify+0xce/0xdb to a SOFTIRQ-irq-unsafe lock: (tasklist_lock){.+.+}-{2:2} ... which became SOFTIRQ-irq-unsafe at: ... lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 do_wait+0x2b7/0xd70 kernel/exit.c:1595 kernel_wait+0xa0/0x150 kernel/exit.c:1785 call_usermodehelper_exec_sync kernel/umh.c:140 [inline] call_usermodehelper_exec_work+0xf9/0x180 kernel/umh.c:167 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 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); lock(&client->buffer_lock); *** DEADLOCK *** 7 locks held by syz-executor.5/30085: #0: ffff888022a66110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x1d7/0x760 drivers/input/evdev.c:513 #1: ffff888022a64230 (&dev->event_lock#2){-.-.}-{2:2}, at: input_inject_event+0x9f/0x330 drivers/input/input.c:457 #2: ffffffff8c791b00 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:66 [inline] #2: ffffffff8c791b00 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:63 [inline] #2: ffffffff8c791b00 (rcu_read_lock){....}-{1:2}, at: input_inject_event+0x8b/0x330 drivers/input/input.c:456 #3: ffffffff8c791b00 (rcu_read_lock){....}-{1:2}, at: input_pass_values.part.0+0x0/0x710 drivers/input/input.c:2523 #4: ffffffff8c791b00 (rcu_read_lock){....}-{1:2}, at: evdev_events+0x5d/0x3e0 drivers/input/evdev.c:296 #5: ffff88807b3fe028 (&client->buffer_lock){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline] #5: ffff88807b3fe028 (&client->buffer_lock){..-.}-{2:2}, at: evdev_pass_values.part.0+0xf6/0x960 drivers/input/evdev.c:261 #6: ffffffff8c791b00 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x45/0x480 fs/fcntl.c:1015 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:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:350 [inline] evdev_pass_values.part.0+0xf6/0x960 drivers/input/evdev.c:261 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x35d/0x3e0 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:128 input_pass_values.part.0+0x230/0x710 drivers/input/input.c:160 input_pass_values drivers/input/input.c:149 [inline] input_event_dispose+0x537/0x730 drivers/input/input.c:386 input_handle_event+0x120/0xe70 drivers/input/input.c:403 input_event drivers/input/input.c:432 [inline] input_event+0x83/0xa0 drivers/input/input.c:424 hidinput_hid_event+0xa2a/0x2010 drivers/hid/hid-input.c:1649 hid_process_event+0x491/0x570 drivers/hid/hid-core.c:1530 hid_process_report drivers/hid/hid-core.c:1678 [inline] hid_report_raw_event+0x9fa/0x1270 drivers/hid/hid-core.c:2001 hid_input_report+0x363/0x4d0 drivers/hid/hid-core.c:2069 hid_irq_in+0x50f/0x690 drivers/hid/usbhid/hid-core.c:284 __usb_hcd_giveback_urb+0x2b6/0x5c0 drivers/usb/core/hcd.c:1671 usb_hcd_giveback_urb+0x384/0x430 drivers/usb/core/hcd.c:1754 dummy_timer+0x1203/0x32d0 drivers/usb/gadget/udc/dummy_hcd.c:1988 call_timer_fn+0x1da/0x7c0 kernel/time/timer.c:1700 expire_timers+0x2c6/0x5c0 kernel/time/timer.c:1751 __run_timers kernel/time/timer.c:2022 [inline] __run_timers kernel/time/timer.c:1995 [inline] run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035 __do_softirq+0x1fb/0xadc kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1107 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649 native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline] acpi_idle_do_entry+0x1fd/0x2a0 drivers/acpi/processor_idle.c:570 acpi_idle_enter+0x368/0x510 drivers/acpi/processor_idle.c:707 cpuidle_enter_state+0x1af/0xd40 drivers/cpuidle/cpuidle.c:239 cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:356 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x3f7/0x590 kernel/sched/idle.c:303 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:400 start_secondary+0x256/0x300 arch/x86/kernel/smpboot.c:264 secondary_startup_64_no_verify+0xce/0xdb INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:350 [inline] evdev_pass_values.part.0+0xf6/0x960 drivers/input/evdev.c:261 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x35d/0x3e0 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:128 input_pass_values.part.0+0x230/0x710 drivers/input/input.c:160 input_pass_values drivers/input/input.c:147 [inline] input_event_dispose+0x5cf/0x730 drivers/input/input.c:375 input_handle_event+0x120/0xe70 drivers/input/input.c:403 input_event drivers/input/input.c:432 [inline] input_event+0x83/0xa0 drivers/input/input.c:424 uinput_inject_events drivers/input/misc/uinput.c:591 [inline] uinput_write+0xcd1/0x11e0 drivers/input/misc/uinput.c:613 vfs_write+0x2db/0xdd0 fs/read_write.c:582 ksys_write+0x1ec/0x250 fs/read_write.c:637 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 } ... key at: [] __key.3+0x0/0x40 the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock: -> (tasklist_lock){.+.+}-{2:2} { HARDIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 do_wait+0x2b7/0xd70 kernel/exit.c:1595 kernel_wait+0xa0/0x150 kernel/exit.c:1785 call_usermodehelper_exec_sync kernel/umh.c:140 [inline] call_usermodehelper_exec_work+0xf9/0x180 kernel/umh.c:167 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 SOFTIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 do_wait+0x2b7/0xd70 kernel/exit.c:1595 kernel_wait+0xa0/0x150 kernel/exit.c:1785 call_usermodehelper_exec_sync kernel/umh.c:140 [inline] call_usermodehelper_exec_work+0xf9/0x180 kernel/umh.c:167 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0x36/0x50 kernel/locking/spinlock.c:326 copy_process+0x4efb/0x7520 kernel/fork.c:2400 kernel_clone+0xeb/0x990 kernel/fork.c:2681 user_mode_thread+0xb1/0xf0 kernel/fork.c:2757 rest_init+0x27/0x270 init/main.c:697 arch_call_rest_init+0x13/0x1c init/main.c:894 start_kernel+0x44f/0x470 init/main.c:1148 secondary_startup_64_no_verify+0xce/0xdb INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 do_wait+0x2b7/0xd70 kernel/exit.c:1595 kernel_wait+0xa0/0x150 kernel/exit.c:1785 call_usermodehelper_exec_sync kernel/umh.c:140 [inline] call_usermodehelper_exec_work+0xf9/0x180 kernel/umh.c:167 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 } ... key at: [] tasklist_lock+0x18/0x40 ... acquired at: __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 send_sigurg+0xb1/0xae0 fs/fcntl.c:833 sk_send_sigurg+0x7a/0x320 net/core/sock.c:3355 tcp_check_urg net/ipv4/tcp_input.c:5626 [inline] tcp_urg+0x38e/0xb40 net/ipv4/tcp_input.c:5667 tcp_rcv_established+0x897/0x2230 net/ipv4/tcp_input.c:6014 tcp_v6_do_rcv+0x814/0x13c0 net/ipv6/tcp_ipv6.c:1489 sk_backlog_rcv include/net/sock.h:1113 [inline] __release_sock+0x133/0x3b0 net/core/sock.c:2928 release_sock+0x58/0x1b0 net/core/sock.c:3485 sk_stream_wait_memory+0x72f/0xf30 net/core/stream.c:145 tcp_sendmsg_locked+0x944/0x2950 net/ipv4/tcp.c:1445 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1483 inet6_sendmsg+0x9d/0xe0 net/ipv6/af_inet6.c:660 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xd3/0x120 net/socket.c:734 __sys_sendto+0x23a/0x340 net/socket.c:2117 __do_sys_sendto net/socket.c:2129 [inline] __se_sys_sendto net/socket.c:2125 [inline] __ia32_sys_sendto+0xdf/0x1b0 net/socket.c:2125 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 -> (&f->f_owner.lock){....}-{2:2} { INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0x36/0x50 kernel/locking/spinlock.c:326 f_modown+0x2a/0x390 fs/fcntl.c:91 generic_add_lease fs/locks.c:1806 [inline] generic_setlease+0x127b/0x18e0 fs/locks.c:1885 vfs_setlease+0x101/0x130 fs/locks.c:1975 do_fcntl_add_lease fs/locks.c:1996 [inline] fcntl_setlease+0x138/0x2c0 fs/locks.c:2018 do_fcntl+0xd30/0x11a0 fs/fcntl.c:403 do_compat_fcntl64+0x303/0x630 fs/fcntl.c:658 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236 send_sigio+0x28/0x370 fs/fcntl.c:778 kill_fasync_rcu fs/fcntl.c:1003 [inline] kill_fasync fs/fcntl.c:1017 [inline] kill_fasync+0x1fc/0x480 fs/fcntl.c:1010 lease_break_callback+0x23/0x30 fs/locks.c:521 __break_lease+0x3e2/0x1590 fs/locks.c:1521 break_lease include/linux/fs.h:2638 [inline] break_lease include/linux/fs.h:2628 [inline] do_dentry_open+0x65e/0x13f0 fs/open.c:873 do_open fs/namei.c:3557 [inline] path_openat+0x1bbc/0x2a50 fs/namei.c:3714 do_filp_open+0x1ba/0x410 fs/namei.c:3741 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_compat_sys_openat fs/open.c:1386 [inline] __se_compat_sys_openat fs/open.c:1384 [inline] __ia32_compat_sys_openat+0x143/0x1f0 fs/open.c:1384 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 } ... key at: [] __key.5+0x0/0x40 ... acquired at: __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236 send_sigio+0x28/0x370 fs/fcntl.c:778 kill_fasync_rcu fs/fcntl.c:1003 [inline] kill_fasync fs/fcntl.c:1017 [inline] kill_fasync+0x1fc/0x480 fs/fcntl.c:1010 lease_break_callback+0x23/0x30 fs/locks.c:521 __break_lease+0x3e2/0x1590 fs/locks.c:1521 break_lease include/linux/fs.h:2638 [inline] break_lease include/linux/fs.h:2628 [inline] do_dentry_open+0x65e/0x13f0 fs/open.c:873 do_open fs/namei.c:3557 [inline] path_openat+0x1bbc/0x2a50 fs/namei.c:3714 do_filp_open+0x1ba/0x410 fs/namei.c:3741 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_compat_sys_openat fs/open.c:1386 [inline] __se_compat_sys_openat fs/open.c:1384 [inline] __ia32_compat_sys_openat+0x143/0x1f0 fs/open.c:1384 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 -> (&new->fa_lock){....}-{2:2} { INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0x36/0x50 kernel/locking/spinlock.c:326 fasync_remove_entry+0xba/0x1f0 fs/fcntl.c:873 fasync_helper+0xa2/0xb0 fs/fcntl.c:976 lease_modify fs/locks.c:1386 [inline] lease_modify+0x28e/0x380 fs/locks.c:1373 locks_remove_lease fs/locks.c:2625 [inline] locks_remove_file+0x2a0/0x570 fs/locks.c:2650 __fput+0x1b5/0xa90 fs/file_table.c:312 task_work_run+0x16f/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 __do_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:996 [inline] kill_fasync fs/fcntl.c:1017 [inline] kill_fasync+0x13a/0x480 fs/fcntl.c:1010 lease_break_callback+0x23/0x30 fs/locks.c:521 __break_lease+0x3e2/0x1590 fs/locks.c:1521 break_lease include/linux/fs.h:2638 [inline] break_lease include/linux/fs.h:2628 [inline] do_dentry_open+0x65e/0x13f0 fs/open.c:873 do_open fs/namei.c:3557 [inline] path_openat+0x1bbc/0x2a50 fs/namei.c:3714 do_filp_open+0x1ba/0x410 fs/namei.c:3741 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_compat_sys_openat fs/open.c:1386 [inline] __se_compat_sys_openat fs/open.c:1384 [inline] __ia32_compat_sys_openat+0x143/0x1f0 fs/open.c:1384 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 } ... key at: [] __key.0+0x0/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:996 [inline] kill_fasync fs/fcntl.c:1017 [inline] kill_fasync+0x13a/0x480 fs/fcntl.c:1010 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values.part.0+0x667/0x960 drivers/input/evdev.c:278 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x35d/0x3e0 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:128 input_pass_values.part.0+0x230/0x710 drivers/input/input.c:160 input_pass_values drivers/input/input.c:147 [inline] input_event_dispose+0x5cf/0x730 drivers/input/input.c:375 input_handle_event+0x120/0xe70 drivers/input/input.c:403 input_inject_event+0x1c8/0x330 drivers/input/input.c:462 evdev_write+0x434/0x760 drivers/input/evdev.c:530 vfs_write+0x2db/0xdd0 fs/read_write.c:582 ksys_write+0x1ec/0x250 fs/read_write.c:637 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 stack backtrace: CPU: 1 PID: 30085 Comm: syz-executor.5 Not tainted 6.2.0-rc4-syzkaller-00041-gc1649ec55708 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 print_bad_irq_dependency kernel/locking/lockdep.c:2611 [inline] check_irq_usage.cold+0x4e4/0x761 kernel/locking/lockdep.c:2850 check_prev_add kernel/locking/lockdep.c:3101 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x2a5b/0x56d0 kernel/locking/lockdep.c:5055 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:996 [inline] kill_fasync fs/fcntl.c:1017 [inline] kill_fasync+0x13a/0x480 fs/fcntl.c:1010 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values.part.0+0x667/0x960 drivers/input/evdev.c:278 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x35d/0x3e0 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:128 input_pass_values.part.0+0x230/0x710 drivers/input/input.c:160 input_pass_values drivers/input/input.c:147 [inline] input_event_dispose+0x5cf/0x730 drivers/input/input.c:375 input_handle_event+0x120/0xe70 drivers/input/input.c:403 input_inject_event+0x1c8/0x330 drivers/input/input.c:462 evdev_write+0x434/0x760 drivers/input/evdev.c:530 vfs_write+0x2db/0xdd0 fs/read_write.c:582 ksys_write+0x1ec/0x250 fs/read_write.c:637 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7f65549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7f605cc EFLAGS: 00000296 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000040 RDX: 0000000000001698 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 03 74 c0 01 add 0x1(%rax,%rax,8),%esi 4: 10 05 03 74 b8 01 adc %al,0x1b87403(%rip) # 0x1b8740d a: 10 06 adc %al,(%rsi) c: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 10: 10 07 adc %al,(%rdi) 12: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi 16: 10 08 adc %cl,(%rax) 18: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1c: 00 00 add %al,(%rax) 1e: 00 00 add %al,(%rax) 20: 00 51 52 add %dl,0x52(%rcx) 23: 55 push %rbp 24: 89 e5 mov %esp,%ebp 26: 0f 34 sysenter 28: cd 80 int $0x80 * 2a: 5d pop %rbp <-- trapping instruction 2b: 5a pop %rdx 2c: 59 pop %rcx 2d: c3 retq 2e: 90 nop 2f: 90 nop 30: 90 nop 31: 90 nop 32: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 39: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi