===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 6.12.0-next-20241120-syzkaller #0 Not tainted ----------------------------------------------------- syz.9.1189/10289 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffff888032484360 (&new->fa_lock){....}-{3:3}, at: kill_fasync_rcu fs/fcntl.c:1121 [inline] ffff888032484360 (&new->fa_lock){....}-{3:3}, at: kill_fasync+0x199/0x4f0 fs/fcntl.c:1145 and this task is already holding: ffff888078596028 (&client->buffer_lock){..-.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline] ffff888078596028 (&client->buffer_lock){..-.}-{3:3}, at: evdev_pass_values+0xf2/0xad0 drivers/input/evdev.c:261 which would create a new lock dependency: (&client->buffer_lock){..-.}-{3:3} -> (&new->fa_lock){....}-{3:3} but this new dependency connects a SOFTIRQ-irq-safe lock: (&client->buffer_lock){..-.}-{3:3} ... which became SOFTIRQ-irq-safe at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __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:351 [inline] evdev_pass_values+0xf2/0xad0 drivers/input/evdev.c:261 evdev_events+0x1c2/0x300 drivers/input/evdev.c:306 input_pass_values+0x268/0x890 drivers/input/input.c:126 input_event_dispose+0x3a4/0x600 drivers/input/input.c:352 input_handle_event+0xa71/0xbe0 drivers/input/input.c:369 input_event+0xa4/0xd0 drivers/input/input.c:398 hidinput_hid_event+0x138c/0x1ca0 drivers/hid/hid-input.c:1719 hid_process_event+0x439/0x590 drivers/hid/hid-core.c:1546 hid_process_report drivers/hid/hid-core.c:1694 [inline] hid_report_raw_event+0xf1f/0x17b0 drivers/hid/hid-core.c:2046 __hid_input_report drivers/hid/hid-core.c:2116 [inline] hid_input_report+0x416/0x500 drivers/hid/hid-core.c:2138 hid_irq_in+0x4a0/0x6d0 drivers/hid/usbhid/hid-core.c:285 __usb_hcd_giveback_urb+0x42c/0x6e0 drivers/usb/core/hcd.c:1650 dummy_timer+0x856/0x4620 drivers/usb/gadget/udc/dummy_hcd.c:1993 __run_hrtimer kernel/time/hrtimer.c:1739 [inline] __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1803 hrtimer_run_softirq+0x19a/0x2c0 kernel/time/hrtimer.c:1820 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:655 irq_exit_rcu+0x9/0x30 kernel/softirq.c:671 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 native_irq_enable arch/x86/include/asm/irqflags.h:42 [inline] arch_local_irq_enable arch/x86/include/asm/irqflags.h:97 [inline] raw_spin_rq_unlock_irq kernel/sched/sched.h:1526 [inline] finish_lock_switch kernel/sched/core.c:5123 [inline] finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5241 context_switch kernel/sched/core.c:5372 [inline] __schedule+0x1858/0x4c30 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 do_nanosleep+0x197/0x600 kernel/time/hrtimer.c:2093 hrtimer_nanosleep+0x1ec/0x410 kernel/time/hrtimer.c:2140 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1402 [inline] __se_sys_clock_nanosleep+0x32b/0x3c0 kernel/time/posix-timers.c:1379 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f to a SOFTIRQ-irq-unsafe lock: (tasklist_lock){.+.+}-{3:3} ... which became SOFTIRQ-irq-unsafe at: ... lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228 __do_wait+0x12d/0x850 kernel/exit.c:1647 do_wait+0x1e9/0x560 kernel/exit.c:1691 kernel_wait+0xe9/0x240 kernel/exit.c:1867 call_usermodehelper_exec_sync kernel/umh.c:136 [inline] call_usermodehelper_exec_work+0xbd/0x230 kernel/umh.c:163 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 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.9.1189/10289: #0: ffff88802a23b118 (&evdev->mutex){+.+.}-{4:4}, at: evdev_write+0x25e/0x790 drivers/input/evdev.c:511 #1: ffff8881476c0230 (&dev->event_lock#2){..-.}-{3:3}, at: input_inject_event+0xc5/0x340 drivers/input/input.c:423 #2: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #2: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: input_inject_event+0xd6/0x340 drivers/input/input.c:425 #3: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #3: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #3: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: input_pass_values+0x8e/0x890 drivers/input/input.c:118 #4: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #4: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #4: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: evdev_events+0x6f/0x300 drivers/input/evdev.c:298 #5: ffff888078596028 (&client->buffer_lock){..-.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline] #5: ffff888078596028 (&client->buffer_lock){..-.}-{3:3}, at: evdev_pass_values+0xf2/0xad0 drivers/input/evdev.c:261 #6: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #6: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #6: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: kill_fasync+0x54/0x4f0 fs/fcntl.c:1144 the dependencies between SOFTIRQ-irq-safe lock and the holding lock: -> (&client->buffer_lock){..-.}-{3:3} { IN-SOFTIRQ-W at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __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:351 [inline] evdev_pass_values+0xf2/0xad0 drivers/input/evdev.c:261 evdev_events+0x1c2/0x300 drivers/input/evdev.c:306 input_pass_values+0x268/0x890 drivers/input/input.c:126 input_event_dispose+0x3a4/0x600 drivers/input/input.c:352 input_handle_event+0xa71/0xbe0 drivers/input/input.c:369 input_event+0xa4/0xd0 drivers/input/input.c:398 hidinput_hid_event+0x138c/0x1ca0 drivers/hid/hid-input.c:1719 hid_process_event+0x439/0x590 drivers/hid/hid-core.c:1546 hid_process_report drivers/hid/hid-core.c:1694 [inline] hid_report_raw_event+0xf1f/0x17b0 drivers/hid/hid-core.c:2046 __hid_input_report drivers/hid/hid-core.c:2116 [inline] hid_input_report+0x416/0x500 drivers/hid/hid-core.c:2138 hid_irq_in+0x4a0/0x6d0 drivers/hid/usbhid/hid-core.c:285 __usb_hcd_giveback_urb+0x42c/0x6e0 drivers/usb/core/hcd.c:1650 dummy_timer+0x856/0x4620 drivers/usb/gadget/udc/dummy_hcd.c:1993 __run_hrtimer kernel/time/hrtimer.c:1739 [inline] __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1803 hrtimer_run_softirq+0x19a/0x2c0 kernel/time/hrtimer.c:1820 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:655 irq_exit_rcu+0x9/0x30 kernel/softirq.c:671 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 native_irq_enable arch/x86/include/asm/irqflags.h:42 [inline] arch_local_irq_enable arch/x86/include/asm/irqflags.h:97 [inline] raw_spin_rq_unlock_irq kernel/sched/sched.h:1526 [inline] finish_lock_switch kernel/sched/core.c:5123 [inline] finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5241 context_switch kernel/sched/core.c:5372 [inline] __schedule+0x1858/0x4c30 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 do_nanosleep+0x197/0x600 kernel/time/hrtimer.c:2093 hrtimer_nanosleep+0x1ec/0x410 kernel/time/hrtimer.c:2140 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1402 [inline] __se_sys_clock_nanosleep+0x32b/0x3c0 kernel/time/posix-timers.c:1379 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f INITIAL USE at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __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:351 [inline] evdev_pass_values+0xf2/0xad0 drivers/input/evdev.c:261 evdev_events+0x1c2/0x300 drivers/input/evdev.c:306 input_pass_values+0x268/0x890 drivers/input/input.c:126 input_event_dispose+0x30f/0x600 drivers/input/input.c:341 input_handle_event+0xa71/0xbe0 drivers/input/input.c:369 input_inject_event+0x22f/0x340 drivers/input/input.c:428 evdev_write+0x5fd/0x790 drivers/input/evdev.c:528 vfs_write+0x2a3/0xd30 fs/read_write.c:677 ksys_write+0x18f/0x2b0 fs/read_write.c:731 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f } ... key at: [] evdev_open.__key.21+0x0/0x20 the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock: -> (tasklist_lock){.+.+}-{3:3} { HARDIRQ-ON-R at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228 __do_wait+0x12d/0x850 kernel/exit.c:1647 do_wait+0x1e9/0x560 kernel/exit.c:1691 kernel_wait+0xe9/0x240 kernel/exit.c:1867 call_usermodehelper_exec_sync kernel/umh.c:136 [inline] call_usermodehelper_exec_work+0xbd/0x230 kernel/umh.c:163 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 SOFTIRQ-ON-R at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228 __do_wait+0x12d/0x850 kernel/exit.c:1647 do_wait+0x1e9/0x560 kernel/exit.c:1691 kernel_wait+0xe9/0x240 kernel/exit.c:1867 call_usermodehelper_exec_sync kernel/umh.c:136 [inline] call_usermodehelper_exec_work+0xbd/0x230 kernel/umh.c:163 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INITIAL USE at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0xd3/0x120 kernel/locking/spinlock.c:326 copy_process+0x2267/0x3d50 kernel/fork.c:2500 kernel_clone+0x226/0x8f0 kernel/fork.c:2784 user_mode_thread+0x132/0x1a0 kernel/fork.c:2862 rest_init+0x23/0x300 init/main.c:712 start_kernel+0x47f/0x500 init/main.c:1102 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507 x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488 common_startup_64+0x13e/0x147 INITIAL READ USE at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228 __do_wait+0x12d/0x850 kernel/exit.c:1647 do_wait+0x1e9/0x560 kernel/exit.c:1691 kernel_wait+0xe9/0x240 kernel/exit.c:1867 call_usermodehelper_exec_sync kernel/umh.c:136 [inline] call_usermodehelper_exec_work+0xbd/0x230 kernel/umh.c:163 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 } ... key at: [] tasklist_lock+0x18/0x40 ... acquired at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228 send_sigio+0x108/0x390 fs/fcntl.c:918 dnotify_handle_event+0x157/0x460 fs/notify/dnotify/dnotify.c:113 fsnotify_handle_event fs/notify/fsnotify.c:353 [inline] send_to_group fs/notify/fsnotify.c:401 [inline] fsnotify+0x1948/0x1f70 fs/notify/fsnotify.c:610 fsnotify_parent include/linux/fsnotify.h:99 [inline] fsnotify_file include/linux/fsnotify.h:131 [inline] fsnotify_access+0x216/0x280 include/linux/fsnotify.h:380 iterate_dir+0x5bf/0x800 fs/readdir.c:110 __do_sys_getdents64 fs/readdir.c:403 [inline] __se_sys_getdents64+0x1e2/0x4b0 fs/readdir.c:389 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> (&f_owner->lock){....}-{3:3} { INITIAL USE at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0xd3/0x120 kernel/locking/spinlock.c:326 __f_setown+0x6b/0x380 fs/fcntl.c:136 fcntl_dirnotify+0x3f0/0x6b0 fs/notify/dnotify/dnotify.c:369 do_fcntl+0x80b/0x1a80 fs/fcntl.c:536 __do_sys_fcntl fs/fcntl.c:588 [inline] __se_sys_fcntl+0xd2/0x1e0 fs/fcntl.c:573 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f INITIAL READ USE at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xdd/0x130 kernel/locking/spinlock.c:236 send_sigio+0x37/0x390 fs/fcntl.c:904 dnotify_handle_event+0x157/0x460 fs/notify/dnotify/dnotify.c:113 fsnotify_handle_event fs/notify/fsnotify.c:353 [inline] send_to_group fs/notify/fsnotify.c:401 [inline] fsnotify+0x1948/0x1f70 fs/notify/fsnotify.c:610 fsnotify_name include/linux/fsnotify.h:55 [inline] fsnotify_dirent include/linux/fsnotify.h:61 [inline] fsnotify_create include/linux/fsnotify.h:278 [inline] open_last_lookups fs/namei.c:3751 [inline] path_openat+0x1686/0x3590 fs/namei.c:3984 do_filp_open+0x27f/0x4e0 fs/namei.c:4014 do_sys_openat2+0x13e/0x1d0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1428 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f } ... key at: [] file_f_owner_allocate.__key+0x0/0x20 ... acquired at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xdd/0x130 kernel/locking/spinlock.c:236 send_sigio+0x37/0x390 fs/fcntl.c:904 kill_fasync_rcu fs/fcntl.c:1130 [inline] kill_fasync+0x256/0x4f0 fs/fcntl.c:1145 lease_break_callback+0x26/0x30 fs/locks.c:558 __break_lease+0x6d5/0x1820 fs/locks.c:1592 break_lease include/linux/filelock.h:441 [inline] do_dentry_open+0xb3a/0x1b70 fs/open.c:936 vfs_open+0x3e/0x330 fs/open.c:1075 do_open fs/namei.c:3828 [inline] path_openat+0x2c84/0x3590 fs/namei.c:3987 do_filp_open+0x27f/0x4e0 fs/namei.c:4014 do_sys_openat2+0x13e/0x1d0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1428 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> (&new->fa_lock){....}-{3:3} { INITIAL USE at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0xd3/0x120 kernel/locking/spinlock.c:326 fasync_remove_entry+0xff/0x1d0 fs/fcntl.c:998 sock_fasync+0x87/0x100 net/socket.c:1433 __fput+0x875/0xa50 fs/file_table.c:447 task_work_run+0x24f/0x310 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f INITIAL READ USE at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xdd/0x130 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:1121 [inline] kill_fasync+0x199/0x4f0 fs/fcntl.c:1145 sock_wake_async+0x147/0x170 sk_wake_async_rcu include/net/sock.h:2468 [inline] sock_def_readable+0x3df/0x5b0 net/core/sock.c:3455 packet_rcv+0xfc4/0x14b0 net/packet/af_packet.c:2277 deliver_skb net/core/dev.c:2239 [inline] deliver_ptype_list_skb net/core/dev.c:2254 [inline] __netif_receive_skb_core+0x3801/0x4690 net/core/dev.c:5623 __netif_receive_skb_one_core net/core/dev.c:5670 [inline] __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785 netif_receive_skb_internal net/core/dev.c:5871 [inline] netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930 tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550 tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007 tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053 new_sync_write fs/read_write.c:586 [inline] vfs_write+0xaeb/0xd30 fs/read_write.c:679 ksys_write+0x18f/0x2b0 fs/read_write.c:731 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f } ... key at: [] fasync_insert_entry.__key+0x0/0x20 ... acquired at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xdd/0x130 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:1121 [inline] kill_fasync+0x199/0x4f0 fs/fcntl.c:1145 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x58a/0xad0 drivers/input/evdev.c:278 evdev_events+0x1c2/0x300 drivers/input/evdev.c:306 input_pass_values+0x268/0x890 drivers/input/input.c:126 input_event_dispose+0x30f/0x600 drivers/input/input.c:341 input_handle_event+0xa71/0xbe0 drivers/input/input.c:369 input_inject_event+0x22f/0x340 drivers/input/input.c:428 evdev_write+0x5fd/0x790 drivers/input/evdev.c:528 vfs_write+0x2a3/0xd30 fs/read_write.c:677 ksys_write+0x18f/0x2b0 fs/read_write.c:731 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f stack backtrace: CPU: 1 UID: 0 PID: 10289 Comm: syz.9.1189 Not tainted 6.12.0-next-20241120-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_bad_irq_dependency kernel/locking/lockdep.c:2647 [inline] check_irq_usage kernel/locking/lockdep.c:2888 [inline] check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x4ebd/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xdd/0x130 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:1121 [inline] kill_fasync+0x199/0x4f0 fs/fcntl.c:1145 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x58a/0xad0 drivers/input/evdev.c:278 evdev_events+0x1c2/0x300 drivers/input/evdev.c:306 input_pass_values+0x268/0x890 drivers/input/input.c:126 input_event_dispose+0x30f/0x600 drivers/input/input.c:341 input_handle_event+0xa71/0xbe0 drivers/input/input.c:369 input_inject_event+0x22f/0x340 drivers/input/input.c:428 evdev_write+0x5fd/0x790 drivers/input/evdev.c:528 vfs_write+0x2a3/0xd30 fs/read_write.c:677 ksys_write+0x18f/0x2b0 fs/read_write.c:731 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa92157e819 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa922322038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fa921735fa0 RCX: 00007fa92157e819 RDX: 0000000000002250 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007fa9215f175e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fa921735fa0 R15: 00007ffc0e015588