===================================================== WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected 6.6.0-syzkaller-16159-g3ca112b71f35 #0 Not tainted ----------------------------------------------------- syz-executor102/5072 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffff888015a56d98 (&f->f_owner.lock){....}-{2:2}, at: send_sigio+0x28/0x3c0 fs/fcntl.c:780 and this task is already holding: ffff88806433d018 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:998 [inline] ffff88806433d018 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1019 [inline] ffff88806433d018 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x138/0x4f0 fs/fcntl.c:1012 which would create a new lock dependency: (&new->fa_lock){....}-{2:2} -> (&f->f_owner.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 kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 input_event drivers/input/input.c:434 [inline] input_event+0x70/0xa0 drivers/input/input.c:427 input_report_key include/linux/input.h:425 [inline] psmouse_report_standard_buttons+0x30/0x80 drivers/input/mouse/psmouse-base.c:128 psmouse_report_standard_packet drivers/input/mouse/psmouse-base.c:146 [inline] psmouse_process_byte+0x39c/0x8a0 drivers/input/mouse/psmouse-base.c:237 psmouse_handle_byte+0x41/0x560 drivers/input/mouse/psmouse-base.c:279 psmouse_receive_byte+0x243/0xe10 drivers/input/mouse/psmouse-base.c:426 ps2_interrupt+0x1fe/0x5a0 drivers/input/serio/libps2.c:613 serio_interrupt+0x8d/0x150 drivers/input/serio/serio.c:998 i8042_interrupt+0x3f2/0x8a0 drivers/input/serio/i8042.c:606 __handle_irq_event_percpu+0x22a/0x740 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x261/0xcf0 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq arch/x86/kernel/irq.c:238 [inline] __common_interrupt+0xdb/0x240 arch/x86/kernel/irq.c:257 common_interrupt+0xa9/0xd0 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:636 lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5721 __fs_reclaim_acquire mm/page_alloc.c:3693 [inline] fs_reclaim_acquire+0x100/0x150 mm/page_alloc.c:3707 might_alloc include/linux/sched/mm.h:303 [inline] slab_pre_alloc_hook mm/slab.h:710 [inline] slab_alloc_node mm/slub.c:3460 [inline] slab_alloc mm/slub.c:3486 [inline] __kmem_cache_alloc_lru mm/slub.c:3493 [inline] kmem_cache_alloc+0x4f/0x380 mm/slub.c:3502 kmem_cache_zalloc include/linux/slab.h:711 [inline] __kernfs_new_node+0xd3/0x890 fs/kernfs/dir.c:615 kernfs_new_node+0x94/0x110 fs/kernfs/dir.c:679 __kernfs_create_file+0x53/0x340 fs/kernfs/file.c:1025 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:307 sysfs_create_file_ns+0x13e/0x1d0 fs/sysfs/file.c:368 sysfs_create_file include/linux/sysfs.h:625 [inline] driver_create_file+0x4a/0x70 drivers/base/driver.c:182 add_bind_files drivers/base/bus.c:591 [inline] bus_add_driver+0x4fe/0x630 drivers/base/bus.c:692 driver_register+0x15c/0x4a0 drivers/base/driver.c:246 usb_register_driver+0x24f/0x500 drivers/usb/core/driver.c:1062 do_one_initcall+0x11c/0x640 init/main.c:1236 do_initcall_level init/main.c:1298 [inline] do_initcalls init/main.c:1314 [inline] do_basic_setup init/main.c:1333 [inline] kernel_init_freeable+0x5c2/0x900 init/main.c:1551 kernel_init+0x1c/0x2a0 init/main.c:1441 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 to a HARDIRQ-irq-unsafe lock: (tasklist_lock){.+.+}-{2:2} ... which became HARDIRQ-irq-unsafe at: ... lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 __do_wait+0x105/0x890 kernel/exit.c:1585 do_wait+0x212/0x520 kernel/exit.c:1629 kernel_wait+0xa0/0x150 kernel/exit.c:1805 call_usermodehelper_exec_sync kernel/umh.c:137 [inline] call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:164 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 other info that might help us debug this: Chain exists of: &dev->event_lock#2 --> &new->fa_lock --> tasklist_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(tasklist_lock); local_irq_disable(); lock(&dev->event_lock#2); lock(&new->fa_lock); lock(&dev->event_lock#2); *** DEADLOCK *** 8 locks held by syz-executor102/5072: #0: ffff888021425110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x201/0x750 drivers/input/evdev.c:513 #1: ffff888021421230 (&dev->event_lock#2){-...}-{2:2}, at: input_inject_event+0xa4/0x370 drivers/input/input.c:460 #2: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline] #2: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline] #2: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: input_inject_event+0xca/0x370 drivers/input/input.c:462 #3: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline] #3: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline] #3: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: input_pass_values.part.0+0x3e/0x7a0 drivers/input/input.c:153 #4: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline] #4: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline] #4: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: evdev_events+0x87/0x390 drivers/input/evdev.c:298 #5: ffff88806443a028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #5: ffff88806443a028 (&client->buffer_lock){....}-{2:2}, at: evdev_pass_values+0x10e/0x9b0 drivers/input/evdev.c:261 #6: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline] #6: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline] #6: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: kill_fasync fs/fcntl.c:1018 [inline] #6: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x6d/0x4f0 fs/fcntl.c:1012 #7: ffff88806433d018 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:998 [inline] #7: ffff88806433d018 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1019 [inline] #7: ffff88806433d018 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x138/0x4f0 fs/fcntl.c:1012 the dependencies between HARDIRQ-irq-safe lock and the holding lock: -> (&dev->event_lock#2){-...}-{2:2} { IN-HARDIRQ-W at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 input_event drivers/input/input.c:434 [inline] input_event+0x70/0xa0 drivers/input/input.c:427 input_report_key include/linux/input.h:425 [inline] psmouse_report_standard_buttons+0x30/0x80 drivers/input/mouse/psmouse-base.c:128 psmouse_report_standard_packet drivers/input/mouse/psmouse-base.c:146 [inline] psmouse_process_byte+0x39c/0x8a0 drivers/input/mouse/psmouse-base.c:237 psmouse_handle_byte+0x41/0x560 drivers/input/mouse/psmouse-base.c:279 psmouse_receive_byte+0x243/0xe10 drivers/input/mouse/psmouse-base.c:426 ps2_interrupt+0x1fe/0x5a0 drivers/input/serio/libps2.c:613 serio_interrupt+0x8d/0x150 drivers/input/serio/serio.c:998 i8042_interrupt+0x3f2/0x8a0 drivers/input/serio/i8042.c:606 __handle_irq_event_percpu+0x22a/0x740 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x261/0xcf0 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq arch/x86/kernel/irq.c:238 [inline] __common_interrupt+0xdb/0x240 arch/x86/kernel/irq.c:257 common_interrupt+0xa9/0xd0 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:636 lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5721 __fs_reclaim_acquire mm/page_alloc.c:3693 [inline] fs_reclaim_acquire+0x100/0x150 mm/page_alloc.c:3707 might_alloc include/linux/sched/mm.h:303 [inline] slab_pre_alloc_hook mm/slab.h:710 [inline] slab_alloc_node mm/slub.c:3460 [inline] slab_alloc mm/slub.c:3486 [inline] __kmem_cache_alloc_lru mm/slub.c:3493 [inline] kmem_cache_alloc+0x4f/0x380 mm/slub.c:3502 kmem_cache_zalloc include/linux/slab.h:711 [inline] __kernfs_new_node+0xd3/0x890 fs/kernfs/dir.c:615 kernfs_new_node+0x94/0x110 fs/kernfs/dir.c:679 __kernfs_create_file+0x53/0x340 fs/kernfs/file.c:1025 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:307 sysfs_create_file_ns+0x13e/0x1d0 fs/sysfs/file.c:368 sysfs_create_file include/linux/sysfs.h:625 [inline] driver_create_file+0x4a/0x70 drivers/base/driver.c:182 add_bind_files drivers/base/bus.c:591 [inline] bus_add_driver+0x4fe/0x630 drivers/base/bus.c:692 driver_register+0x15c/0x4a0 drivers/base/driver.c:246 usb_register_driver+0x24f/0x500 drivers/usb/core/driver.c:1062 do_one_initcall+0x11c/0x640 init/main.c:1236 do_initcall_level init/main.c:1298 [inline] do_initcalls init/main.c:1314 [inline] do_basic_setup init/main.c:1333 [inline] kernel_init_freeable+0x5c2/0x900 init/main.c:1551 kernel_init+0x1c/0x2a0 init/main.c:1441 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 input_inject_event+0xa4/0x370 drivers/input/input.c:460 __led_set_brightness drivers/leds/led-core.c:52 [inline] led_set_brightness_nopm drivers/leds/led-core.c:316 [inline] led_set_brightness_nosleep drivers/leds/led-core.c:347 [inline] led_set_brightness+0x211/0x290 drivers/leds/led-core.c:309 led_trigger_event drivers/leds/led-triggers.c:391 [inline] led_trigger_event+0xb2/0x240 drivers/leds/led-triggers.c:381 kbd_led_trigger_activate+0xc6/0x100 drivers/tty/vt/keyboard.c:1036 led_trigger_set+0x589/0xc00 drivers/leds/led-triggers.c:198 led_trigger_set_default drivers/leds/led-triggers.c:263 [inline] led_trigger_set_default+0x1d2/0x230 drivers/leds/led-triggers.c:250 led_classdev_register_ext+0x78d/0xa10 drivers/leds/led-class.c:569 led_classdev_register include/linux/leds.h:279 [inline] input_leds_connect+0x54a/0x8d0 drivers/input/input-leds.c:139 input_attach_handler.isra.0+0x17c/0x250 drivers/input/input.c:1064 input_register_device+0xb1e/0x1130 drivers/input/input.c:2396 atkbd_connect+0x5e2/0xa20 drivers/input/keyboard/atkbd.c:1298 serio_connect_driver drivers/input/serio/serio.c:44 [inline] serio_driver_probe+0x71/0xa0 drivers/input/serio/serio.c:775 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x234/0xc90 drivers/base/dd.c:658 __driver_probe_device+0x1de/0x4b0 drivers/base/dd.c:800 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:830 __driver_attach+0x274/0x570 drivers/base/dd.c:1216 bus_for_each_dev+0x13c/0x1d0 drivers/base/bus.c:368 serio_attach_driver drivers/input/serio/serio.c:804 [inline] serio_handle_event+0x2b8/0xa90 drivers/input/serio/serio.c:224 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 } ... key at: [] __key.6+0x0/0x40 -> (&client->buffer_lock){....}-{2:2} { INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __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+0x10e/0x9b0 drivers/input/evdev.c:261 evdev_events+0x1b7/0x390 drivers/input/evdev.c:306 input_to_handler+0x29e/0x4c0 drivers/input/input.c:129 input_pass_values.part.0+0x52f/0x7a0 drivers/input/input.c:161 input_pass_values drivers/input/input.c:148 [inline] input_event_dispose+0x5ee/0x770 drivers/input/input.c:378 input_handle_event+0x11c/0xd80 drivers/input/input.c:406 input_inject_event+0x1bb/0x370 drivers/input/input.c:465 evdev_write+0x456/0x750 drivers/input/evdev.c:530 vfs_write+0x2a4/0xdf0 fs/read_write.c:582 ksys_write+0x1f0/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b } ... key at: [] __key.3+0x0/0x40 ... acquired at: __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+0x10e/0x9b0 drivers/input/evdev.c:261 evdev_events+0x1b7/0x390 drivers/input/evdev.c:306 input_to_handler+0x29e/0x4c0 drivers/input/input.c:129 input_pass_values.part.0+0x52f/0x7a0 drivers/input/input.c:161 input_pass_values drivers/input/input.c:148 [inline] input_event_dispose+0x5ee/0x770 drivers/input/input.c:378 input_handle_event+0x11c/0xd80 drivers/input/input.c:406 input_inject_event+0x1bb/0x370 drivers/input/input.c:465 evdev_write+0x456/0x750 drivers/input/evdev.c:530 vfs_write+0x2a4/0xdf0 fs/read_write.c:582 ksys_write+0x1f0/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b -> (&new->fa_lock){....}-{2:2} { INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:998 [inline] kill_fasync fs/fcntl.c:1019 [inline] kill_fasync+0x138/0x4f0 fs/fcntl.c:1012 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x619/0x9b0 drivers/input/evdev.c:278 evdev_events+0x1b7/0x390 drivers/input/evdev.c:306 input_to_handler+0x29e/0x4c0 drivers/input/input.c:129 input_pass_values.part.0+0x52f/0x7a0 drivers/input/input.c:161 input_pass_values drivers/input/input.c:148 [inline] input_event_dispose+0x5ee/0x770 drivers/input/input.c:378 input_handle_event+0x11c/0xd80 drivers/input/input.c:406 input_inject_event+0x1bb/0x370 drivers/input/input.c:465 evdev_write+0x456/0x750 drivers/input/evdev.c:530 vfs_write+0x2a4/0xdf0 fs/read_write.c:582 ksys_write+0x1f0/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b } ... key at: [] __key.0+0x0/0x40 ... acquired at: __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:998 [inline] kill_fasync fs/fcntl.c:1019 [inline] kill_fasync+0x138/0x4f0 fs/fcntl.c:1012 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x619/0x9b0 drivers/input/evdev.c:278 evdev_events+0x1b7/0x390 drivers/input/evdev.c:306 input_to_handler+0x29e/0x4c0 drivers/input/input.c:129 input_pass_values.part.0+0x52f/0x7a0 drivers/input/input.c:161 input_pass_values drivers/input/input.c:148 [inline] input_event_dispose+0x5ee/0x770 drivers/input/input.c:378 input_handle_event+0x11c/0xd80 drivers/input/input.c:406 input_inject_event+0x1bb/0x370 drivers/input/input.c:465 evdev_write+0x456/0x750 drivers/input/evdev.c:530 vfs_write+0x2a4/0xdf0 fs/read_write.c:582 ksys_write+0x1f0/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock: -> (tasklist_lock){.+.+}-{2:2} { HARDIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 __do_wait+0x105/0x890 kernel/exit.c:1585 do_wait+0x212/0x520 kernel/exit.c:1629 kernel_wait+0xa0/0x150 kernel/exit.c:1805 call_usermodehelper_exec_sync kernel/umh.c:137 [inline] call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:164 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 SOFTIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 __do_wait+0x105/0x890 kernel/exit.c:1585 do_wait+0x212/0x520 kernel/exit.c:1629 kernel_wait+0xa0/0x150 kernel/exit.c:1805 call_usermodehelper_exec_sync kernel/umh.c:137 [inline] call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:164 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __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+0x45f4/0x74b0 kernel/fork.c:2626 kernel_clone+0xfd/0x920 kernel/fork.c:2907 user_mode_thread+0xb4/0xf0 kernel/fork.c:2985 rest_init+0x27/0x2b0 init/main.c:695 arch_call_rest_init+0x13/0x30 init/main.c:827 start_kernel+0x39f/0x480 init/main.c:1072 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:555 x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:536 secondary_startup_64_no_verify+0x166/0x16b INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 __do_wait+0x105/0x890 kernel/exit.c:1585 do_wait+0x212/0x520 kernel/exit.c:1629 kernel_wait+0xa0/0x150 kernel/exit.c:1805 call_usermodehelper_exec_sync kernel/umh.c:137 [inline] call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:164 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 } ... 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+0xb0/0xc50 fs/fcntl.c:835 sk_send_sigurg+0x7a/0x370 net/core/sock.c:3396 queue_oob net/unix/af_unix.c:2184 [inline] unix_stream_sendmsg+0xdba/0x10a0 net/unix/af_unix.c:2301 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638 __sys_sendmsg+0x117/0x1e0 net/socket.c:2667 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b -> (&f->f_owner.lock){....}-{2:2} { INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __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:92 __f_setown fs/fcntl.c:111 [inline] f_setown+0xd4/0x2a0 fs/fcntl.c:139 do_fcntl+0x11e6/0x1260 fs/fcntl.c:379 __do_sys_fcntl fs/fcntl.c:456 [inline] __se_sys_fcntl fs/fcntl.c:441 [inline] __x64_sys_fcntl+0x16c/0x1e0 fs/fcntl.c:441 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 send_sigurg+0x22/0xc50 fs/fcntl.c:819 sk_send_sigurg+0x7a/0x370 net/core/sock.c:3396 queue_oob net/unix/af_unix.c:2184 [inline] unix_stream_sendmsg+0xdba/0x10a0 net/unix/af_unix.c:2301 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638 __sys_sendmsg+0x117/0x1e0 net/socket.c:2667 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b } ... key at: [] __key.5+0x0/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 send_sigio+0x28/0x3c0 fs/fcntl.c:780 kill_fasync_rcu fs/fcntl.c:1005 [inline] kill_fasync fs/fcntl.c:1019 [inline] kill_fasync+0x1f6/0x4f0 fs/fcntl.c:1012 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x619/0x9b0 drivers/input/evdev.c:278 evdev_events+0x1b7/0x390 drivers/input/evdev.c:306 input_to_handler+0x29e/0x4c0 drivers/input/input.c:129 input_pass_values.part.0+0x52f/0x7a0 drivers/input/input.c:161 input_pass_values drivers/input/input.c:148 [inline] input_event_dispose+0x5ee/0x770 drivers/input/input.c:378 input_handle_event+0x11c/0xd80 drivers/input/input.c:406 input_inject_event+0x1bb/0x370 drivers/input/input.c:465 evdev_write+0x456/0x750 drivers/input/evdev.c:530 vfs_write+0x2a4/0xdf0 fs/read_write.c:582 ksys_write+0x1f0/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b stack backtrace: CPU: 1 PID: 5072 Comm: syz-executor102 Not tainted 6.6.0-syzkaller-16159-g3ca112b71f35 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_bad_irq_dependency kernel/locking/lockdep.c:2626 [inline] check_irq_usage+0x10b8/0x1c70 kernel/locking/lockdep.c:2865 check_prev_add kernel/locking/lockdep.c:3138 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3868 [inline] __lock_acquire+0x2e53/0x5de0 kernel/locking/lockdep.c:5136 lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 send_sigio+0x28/0x3c0 fs/fcntl.c:780 kill_fasync_rcu fs/fcntl.c:1005 [inline] kill_fasync fs/fcntl.c:1019 [inline] kill_fasync+0x1f6/0x4f0 fs/fcntl.c:1012 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x619/0x9b0 drivers/input/evdev.c:278 evdev_events+0x1b7/0x390 drivers/input/evdev.c:306 input_to_handler+0x29e/0x4c0 drivers/input/input.c:129 input_pass_values.part.0+0x52f/0x7a0 drivers/input/input.c:161 input_pass_values drivers/input/input.c:148 [inline] input_event_dispose+0x5ee/0x770 drivers/input/input.c:378 input_handle_event+0x11c/0xd80 drivers/input/input.c:406 input_inject_event+0x1bb/0x370 drivers/input/input.c:465 evdev_write+0x456/0x750 drivers/input/evdev.c:530 vfs_write+0x2a4/0xdf0 fs/read_write.c:582 ksys_write+0x1f0/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f4bc04c0329 Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd7a33fda8 EFLAGS: 00000246 ORIG_RAX: 000000000000000