===================================================== WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected 5.18.0-rc4-syzkaller-00036-gcf424ef014ac #0 Not tainted ----------------------------------------------------- syz-executor174/3596 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffffffff8c80a058 (tasklist_lock){.+.+}-{2:2}, at: send_sigio+0xbe/0x300 fs/fcntl.c:792 and this task is already holding: ffff88801e7bda30 (&f->f_owner.lock){....}-{2:2}, at: send_sigio+0x2f/0x300 fs/fcntl.c:778 which would create a new lock dependency: (&f->f_owner.lock){....}-{2:2} -> (tasklist_lock){.+.+}-{2:2} but this new dependency connects a HARDIRQ-irq-safe lock: (&dev->event_lock#2){-...}-{2:2} ... which became HARDIRQ-irq-safe at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162 input_event+0x87/0xb0 drivers/input/input.c:456 input_report_key include/linux/input.h:425 [inline] psmouse_report_standard_buttons drivers/input/mouse/psmouse-base.c:123 [inline] psmouse_report_standard_packet+0x4f/0x200 drivers/input/mouse/psmouse-base.c:141 psmouse_process_byte+0x447/0x630 drivers/input/mouse/psmouse-base.c:232 psmouse_handle_byte+0x44/0x4a0 drivers/input/mouse/psmouse-base.c:274 psmouse_interrupt+0x68a/0x1080 drivers/input/mouse/psmouse-base.c:426 serio_interrupt+0x88/0x130 drivers/input/serio/serio.c:1001 i8042_interrupt+0x32d/0x710 drivers/input/serio/i8042.c:606 __handle_irq_event_percpu+0x200/0x620 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x83/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x245/0xbe0 kernel/irq/chip.c:817 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline] handle_irq arch/x86/kernel/irq.c:231 [inline] __common_interrupt+0xce/0x1e0 arch/x86/kernel/irq.c:250 common_interrupt+0x9f/0xc0 arch/x86/kernel/irq.c:240 asm_common_interrupt+0x1e/0x40 slab_alloc mm/slub.c:3225 [inline] __kmalloc+0x19e/0x370 mm/slub.c:4410 kmalloc include/linux/slab.h:586 [inline] kzalloc include/linux/slab.h:714 [inline] kobject_get_path+0xbb/0x1f0 lib/kobject.c:147 kobject_uevent_env+0x355/0x8e0 lib/kobject_uevent.c:529 driver_register+0x399/0x3e0 drivers/base/driver.c:179 usb_register_driver+0x205/0x3d0 drivers/usb/core/driver.c:1062 do_one_initcall+0xbd/0x2b0 init/main.c:1298 do_initcall_level+0x168/0x218 init/main.c:1371 do_initcalls+0x4b/0x8c init/main.c:1387 kernel_init_freeable+0x43a/0x5c3 init/main.c:1613 kernel_init+0x19/0x2b0 init/main.c:1502 ret_from_fork+0x1f/0x30 to a HARDIRQ-irq-unsafe lock: (tasklist_lock){.+.+}-{2:2} ... which became HARDIRQ-irq-unsafe at: ... lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x224/0x9d0 kernel/exit.c:1508 kernel_wait+0xe4/0x230 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xb4/0x220 kernel/umh.c:166 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 other info that might help us debug this: Chain exists of: &dev->event_lock#2 --> &f->f_owner.lock --> tasklist_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(tasklist_lock); local_irq_disable(); lock(&dev->event_lock#2); lock(&f->f_owner.lock); lock(&dev->event_lock#2); *** DEADLOCK *** 5 locks held by syz-executor174/3596: #0: ffffffff8cb1afe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:267 #1: ffffffff8cb1afe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:267 #2: ffffffff8cb1afe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:267 #3: ffff8880796f20c0 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:996 [inline] #3: ffff8880796f20c0 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x13b/0x430 fs/fcntl.c:1017 #4: ffff88801e7bda30 (&f->f_owner.lock){....}-{2:2}, at: send_sigio+0x2f/0x300 fs/fcntl.c:778 the dependencies between HARDIRQ-irq-safe lock and the holding lock: -> (&dev->event_lock#2){-...}-{2:2} { IN-HARDIRQ-W at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162 input_event+0x87/0xb0 drivers/input/input.c:456 input_report_key include/linux/input.h:425 [inline] psmouse_report_standard_buttons drivers/input/mouse/psmouse-base.c:123 [inline] psmouse_report_standard_packet+0x4f/0x200 drivers/input/mouse/psmouse-base.c:141 psmouse_process_byte+0x447/0x630 drivers/input/mouse/psmouse-base.c:232 psmouse_handle_byte+0x44/0x4a0 drivers/input/mouse/psmouse-base.c:274 psmouse_interrupt+0x68a/0x1080 drivers/input/mouse/psmouse-base.c:426 serio_interrupt+0x88/0x130 drivers/input/serio/serio.c:1001 i8042_interrupt+0x32d/0x710 drivers/input/serio/i8042.c:606 __handle_irq_event_percpu+0x200/0x620 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x83/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x245/0xbe0 kernel/irq/chip.c:817 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline] handle_irq arch/x86/kernel/irq.c:231 [inline] __common_interrupt+0xce/0x1e0 arch/x86/kernel/irq.c:250 common_interrupt+0x9f/0xc0 arch/x86/kernel/irq.c:240 asm_common_interrupt+0x1e/0x40 slab_alloc mm/slub.c:3225 [inline] __kmalloc+0x19e/0x370 mm/slub.c:4410 kmalloc include/linux/slab.h:586 [inline] kzalloc include/linux/slab.h:714 [inline] kobject_get_path+0xbb/0x1f0 lib/kobject.c:147 kobject_uevent_env+0x355/0x8e0 lib/kobject_uevent.c:529 driver_register+0x399/0x3e0 drivers/base/driver.c:179 usb_register_driver+0x205/0x3d0 drivers/usb/core/driver.c:1062 do_one_initcall+0xbd/0x2b0 init/main.c:1298 do_initcall_level+0x168/0x218 init/main.c:1371 do_initcalls+0x4b/0x8c init/main.c:1387 kernel_init_freeable+0x43a/0x5c3 init/main.c:1613 kernel_init+0x19/0x2b0 init/main.c:1502 ret_from_fork+0x1f/0x30 INITIAL USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162 input_inject_event+0xb2/0x270 drivers/input/input.c:482 led_trigger_event+0xdb/0x190 drivers/leds/led-triggers.c:390 kbd_led_trigger_activate+0xb8/0x100 drivers/tty/vt/keyboard.c:1036 led_trigger_set+0x53b/0x910 drivers/leds/led-triggers.c:197 led_trigger_set_default+0x1d1/0x210 drivers/leds/led-triggers.c:262 led_classdev_register_ext+0x600/0x7f0 drivers/leds/led-class.c:415 led_classdev_register include/linux/leds.h:196 [inline] input_leds_connect+0x55d/0x780 drivers/input/input-leds.c:139 input_attach_handler drivers/input/input.c:1082 [inline] input_register_device+0xd90/0x1150 drivers/input/input.c:2387 atkbd_connect+0x796/0xa60 drivers/input/keyboard/atkbd.c:1282 serio_connect_driver drivers/input/serio/serio.c:47 [inline] serio_driver_probe+0x76/0x90 drivers/input/serio/serio.c:778 call_driver_probe+0x96/0x250 really_probe+0x222/0x8e0 drivers/base/dd.c:621 __driver_probe_device+0x1f4/0x3f0 drivers/base/dd.c:752 driver_probe_device+0x50/0x240 drivers/base/dd.c:782 __driver_attach+0x35c/0x520 drivers/base/dd.c:1141 bus_for_each_dev+0x188/0x1f0 drivers/base/bus.c:301 serio_attach_driver drivers/input/serio/serio.c:807 [inline] serio_handle_event+0x8bc/0x1060 drivers/input/serio/serio.c:227 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 } ... key at: [] input_allocate_device.__key.6+0x0/0x20 -> (&client->buffer_lock){....}-{2:2} { INITIAL USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __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:349 [inline] evdev_pass_values+0xe7/0xb70 drivers/input/evdev.c:261 evdev_events+0x195/0x280 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:126 [inline] input_pass_values+0x875/0x11e0 drivers/input/input.c:156 input_handle_event+0xbe3/0x1520 drivers/input/input.c:415 input_inject_event+0x187/0x270 drivers/input/input.c:487 evdev_write+0x685/0x7d0 drivers/input/evdev.c:530 vfs_write+0x303/0xd40 fs/read_write.c:589 ksys_write+0x19b/0x2c0 fs/read_write.c:644 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae } ... key at: [] evdev_open.__key.22+0x0/0x20 ... acquired at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __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:349 [inline] evdev_pass_values+0xe7/0xb70 drivers/input/evdev.c:261 evdev_events+0x195/0x280 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:126 [inline] input_pass_values+0x875/0x11e0 drivers/input/input.c:156 input_handle_event+0xbe3/0x1520 drivers/input/input.c:415 input_inject_event+0x187/0x270 drivers/input/input.c:487 evdev_write+0x685/0x7d0 drivers/input/evdev.c:530 vfs_write+0x303/0xd40 fs/read_write.c:589 ksys_write+0x19b/0x2c0 fs/read_write.c:644 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae -> (&new->fa_lock){....}-{2:2} { INITIAL READ USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __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+0x13b/0x430 fs/fcntl.c:1017 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x5df/0xb70 drivers/input/evdev.c:278 evdev_events+0x195/0x280 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:126 [inline] input_pass_values+0x875/0x11e0 drivers/input/input.c:156 input_handle_event+0xbe3/0x1520 drivers/input/input.c:415 input_inject_event+0x187/0x270 drivers/input/input.c:487 evdev_write+0x685/0x7d0 drivers/input/evdev.c:530 vfs_write+0x303/0xd40 fs/read_write.c:589 ksys_write+0x19b/0x2c0 fs/read_write.c:644 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae } ... key at: [] fasync_insert_entry.__key+0x0/0x20 ... acquired at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __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+0x13b/0x430 fs/fcntl.c:1017 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x5df/0xb70 drivers/input/evdev.c:278 evdev_events+0x195/0x280 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:126 [inline] input_pass_values+0x875/0x11e0 drivers/input/input.c:156 input_handle_event+0xbe3/0x1520 drivers/input/input.c:415 input_inject_event+0x187/0x270 drivers/input/input.c:487 evdev_write+0x685/0x7d0 drivers/input/evdev.c:530 vfs_write+0x303/0xd40 fs/read_write.c:589 ksys_write+0x19b/0x2c0 fs/read_write.c:644 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae -> (&f->f_owner.lock){....}-{2:2} { INITIAL USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __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+0x113/0x1a0 fs/fcntl.c:138 sock_ioctl+0x591/0x770 net/socket.c:1182 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae INITIAL READ USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __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/0x300 fs/fcntl.c:778 kill_fasync_rcu fs/fcntl.c:1003 [inline] kill_fasync+0x1e4/0x430 fs/fcntl.c:1017 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x5df/0xb70 drivers/input/evdev.c:278 evdev_events+0x195/0x280 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:126 [inline] input_pass_values+0x875/0x11e0 drivers/input/input.c:156 input_handle_event+0xbe3/0x1520 drivers/input/input.c:415 input_inject_event+0x187/0x270 drivers/input/input.c:487 evdev_write+0x685/0x7d0 drivers/input/evdev.c:530 vfs_write+0x303/0xd40 fs/read_write.c:589 ksys_write+0x19b/0x2c0 fs/read_write.c:644 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae } ... key at: [] __alloc_file.__key+0x0/0x10 ... acquired at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __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/0x300 fs/fcntl.c:778 kill_fasync_rcu fs/fcntl.c:1003 [inline] kill_fasync+0x1e4/0x430 fs/fcntl.c:1017 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x5df/0xb70 drivers/input/evdev.c:278 evdev_events+0x195/0x280 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:126 [inline] input_pass_values+0x875/0x11e0 drivers/input/input.c:156 input_handle_event+0xbe3/0x1520 drivers/input/input.c:415 input_inject_event+0x187/0x270 drivers/input/input.c:487 evdev_write+0x685/0x7d0 drivers/input/evdev.c:530 vfs_write+0x303/0xd40 fs/read_write.c:589 ksys_write+0x19b/0x2c0 fs/read_write.c:644 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock: -> (tasklist_lock){.+.+}-{2:2} { HARDIRQ-ON-R at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x224/0x9d0 kernel/exit.c:1508 kernel_wait+0xe4/0x230 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xb4/0x220 kernel/umh.c:166 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 SOFTIRQ-ON-R at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x224/0x9d0 kernel/exit.c:1508 kernel_wait+0xe4/0x230 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xb4/0x220 kernel/umh.c:166 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 INITIAL USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __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+0x234d/0x3f70 kernel/fork.c:2368 kernel_clone+0x22f/0x7a0 kernel/fork.c:2639 kernel_thread+0x167/0x1e0 kernel/fork.c:2691 rest_init+0x21/0x2e0 init/main.c:691 start_kernel+0x4bf/0x56e init/main.c:1140 secondary_startup_64_no_verify+0xc4/0xcb INITIAL READ USE at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x224/0x9d0 kernel/exit.c:1508 kernel_wait+0xe4/0x230 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xb4/0x220 kernel/umh.c:166 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 } ... key at: [] tasklist_lock+0x18/0x40 ... acquired at: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 send_sigio+0xbe/0x300 fs/fcntl.c:792 kill_fasync_rcu fs/fcntl.c:1003 [inline] kill_fasync+0x1e4/0x430 fs/fcntl.c:1017 sock_wake_async+0x130/0x150 rcu_read_unlock include/linux/rcupdate.h:723 [inline] sk_wake_async+0x12e/0x200 include/net/sock.h:2459 sock_def_readable+0x152/0x200 net/core/sock.c:3164 unix_dgram_sendmsg+0x1553/0x1fc0 net/unix/af_unix.c:2029 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg net/socket.c:725 [inline] ____sys_sendmsg+0x597/0x8e0 net/socket.c:2413 ___sys_sendmsg net/socket.c:2467 [inline] __sys_sendmmsg+0x3d7/0x770 net/socket.c:2553 __do_sys_sendmmsg net/socket.c:2582 [inline] __se_sys_sendmmsg net/socket.c:2579 [inline] __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2579 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae stack backtrace: CPU: 0 PID: 3596 Comm: syz-executor174 Not tainted 5.18.0-rc4-syzkaller-00036-gcf424ef014ac #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __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:2579 [inline] check_irq_usage kernel/locking/lockdep.c:2818 [inline] check_prev_add kernel/locking/lockdep.c:3069 [inline] check_prevs_add kernel/locking/lockdep.c:3188 [inline] validate_chain+0x571e/0x65c0 kernel/locking/lockdep.c:3803 __lock_acquire+0x129a/0x1f80 kernel/locking/lockdep.c:5029 lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 send_sigio+0xbe/0x300 fs/fcntl.c:792 kill_fasync_rcu fs/fcntl.c:1003 [inline] kill_fasync+0x1e4/0x430 fs/fcntl.c:1017 sock_wake_async+0x130/0x150 rcu_read_unlock include/linux/rcupdate.h:723 [inline] sk_wake_async+0x12e/0x200 include/net/sock.h:2459 sock_def_readable+0x152/0x200 net/core/sock.c:3164 unix_dgram_sendmsg+0x1553/0x1fc0 net/unix/af_unix.c:2029 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg net/socket.c:725 [inline] ____sys_sendmsg+0x597/0x8e0 net/socket.c:2413 ___sys_sendmsg net/socket.c:2467 [inline] __sys_sendmmsg+0x3d7/0x770 net/socket.c:2553 __do_sys_sendmmsg net/socket.c:2582 [inline] __se_sys_sendmmsg net/socket.c:2579 [inline] __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2579 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f35b1be7419 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe89aeb4c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f35b1c2b090 RCX: 00007f35b1be7419 RDX: 0307017fdb7a66cb RSI: 0000000020002dc0 RDI: 0000000000000005 RBP: 0000000000000000 R08: 00007ffe89aeb668 R09: 00007ffe89aeb668 R10: 0000000000003ec0 R11: 0000000000000246 R12: 00007f35b1ba64a0 R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000