===================================================== WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected 5.10.52 #1 Not tainted ----------------------------------------------------- syz-executor.4/10944 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffff8880161cb210 (&new->fa_lock){.+.+}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1004 [inline] ffff8880161cb210 (&new->fa_lock){.+.+}-{2:2}, at: kill_fasync fs/fcntl.c:1025 [inline] ffff8880161cb210 (&new->fa_lock){.+.+}-{2:2}, at: kill_fasync+0x134/0x470 fs/fcntl.c:1018 and this task is already holding: ffff8880422b0028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline] ffff8880422b0028 (&client->buffer_lock){....}-{2:2}, at: evdev_pass_values.part.0+0xf6/0x910 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 HARDIRQ-irq-safe lock: (&dev->event_lock){-...}-{2:2} ... which became HARDIRQ-irq-safe at: lock_acquire kernel/locking/lockdep.c:5560 [inline] lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x36/0x50 kernel/locking/spinlock.c:159 input_event drivers/input/input.c:440 [inline] input_event+0x7b/0xb0 drivers/input/input.c:433 input_report_key include/linux/input.h:417 [inline] psmouse_report_standard_buttons+0x2c/0x80 drivers/input/mouse/psmouse-base.c:123 psmouse_report_standard_packet drivers/input/mouse/psmouse-base.c:141 [inline] psmouse_process_byte+0x39a/0x8b0 drivers/input/mouse/psmouse-base.c:232 psmouse_handle_byte+0x47/0x1b0 drivers/input/mouse/psmouse-base.c:274 psmouse_interrupt+0x2fa/0xea0 drivers/input/mouse/psmouse-base.c:426 serio_interrupt+0x8d/0x150 drivers/input/serio/serio.c:1002 i8042_interrupt+0x27e/0x520 drivers/input/serio/i8042.c:602 __handle_irq_event_percpu+0x2ef/0x820 kernel/irq/handle.c:156 handle_irq_event_percpu kernel/irq/handle.c:196 [inline] handle_irq_event+0x102/0x290 kernel/irq/handle.c:213 handle_edge_irq+0x249/0xd00 kernel/irq/chip.c:819 asm_call_irq_on_stack+0x12/0x20 __run_irq_on_irqstack arch/x86/include/asm/irq_stack.h:48 [inline] run_irq_on_irqstack_cond arch/x86/include/asm/irq_stack.h:101 [inline] handle_irq arch/x86/kernel/irq.c:230 [inline] __common_interrupt arch/x86/kernel/irq.c:249 [inline] common_interrupt+0xdd/0x190 arch/x86/kernel/irq.c:239 asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:626 native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline] arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0x25/0x40 kernel/locking/spinlock.c:191 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] i8042_command+0x12e/0x150 drivers/input/serio/i8042.c:352 i8042_aux_write+0xd7/0x120 drivers/input/serio/i8042.c:387 serio_write include/linux/serio.h:125 [inline] ps2_do_sendbyte+0x2d8/0x660 drivers/input/serio/libps2.c:40 ps2_sendbyte+0x4b/0x90 drivers/input/serio/libps2.c:92 cypress_ps2_sendbyte drivers/input/mouse/cypress_ps2.c:42 [inline] cypress_ps2_read_cmd_status drivers/input/mouse/cypress_ps2.c:116 [inline] cypress_send_ext_cmd+0x1c1/0x880 drivers/input/mouse/cypress_ps2.c:189 cypress_detect+0x75/0x190 drivers/input/mouse/cypress_ps2.c:205 psmouse_do_detect drivers/input/mouse/psmouse-base.c:1009 [inline] psmouse_try_protocol+0x20a/0x340 drivers/input/mouse/psmouse-base.c:1023 psmouse_extensions+0x557/0x920 drivers/input/mouse/psmouse-base.c:1146 psmouse_switch_protocol+0x53a/0x710 drivers/input/mouse/psmouse-base.c:1542 psmouse_connect+0x5e3/0xfd0 drivers/input/mouse/psmouse-base.c:1632 serio_connect_driver drivers/input/serio/serio.c:47 [inline] serio_driver_probe+0x77/0xa0 drivers/input/serio/serio.c:778 really_probe+0x288/0xd80 drivers/base/dd.c:559 driver_probe_device+0xfe/0x1d0 drivers/base/dd.c:745 __device_attach_driver+0x23a/0x330 drivers/base/dd.c:851 bus_for_each_drv+0x161/0x1e0 drivers/base/bus.c:431 __device_attach+0x21e/0x460 drivers/base/dd.c:919 bus_probe_device+0x1e6/0x290 drivers/base/bus.c:491 device_add+0xb16/0x1bc0 drivers/base/core.c:2963 serio_add_port drivers/input/serio/serio.c:542 [inline] serio_handle_event+0x480/0x900 drivers/input/serio/serio.c:210 process_one_work+0x9a9/0x1590 kernel/workqueue.c:2270 worker_thread+0x61d/0x1310 kernel/workqueue.c:2416 kthread+0x38f/0x470 kernel/kthread.c:292 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:296 to a HARDIRQ-irq-unsafe lock: (&new->fa_lock){.+.+}-{2:2} ... which became HARDIRQ-irq-unsafe at: ... lock_acquire kernel/locking/lockdep.c:5560 [inline] lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x58/0x70 kernel/locking/spinlock.c:223 kill_fasync_rcu fs/fcntl.c:1004 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0x134/0x470 fs/fcntl.c:1018 wakeup_pipe_writers fs/splice.c:373 [inline] splice_from_pipe_end fs/splice.c:536 [inline] __splice_from_pipe+0x69e/0x840 fs/splice.c:564 splice_from_pipe fs/splice.c:597 [inline] generic_splice_sendpage+0xd5/0x140 fs/splice.c:743 do_splice_from fs/splice.c:764 [inline] do_splice+0xba6/0x1ab0 fs/splice.c:1059 __do_splice+0x134/0x250 fs/splice.c:1137 __do_sys_splice fs/splice.c:1343 [inline] __se_sys_splice fs/splice.c:1325 [inline] __x64_sys_splice+0x19c/0x250 fs/splice.c:1325 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 other info that might help us debug this: Chain exists of: &dev->event_lock --> &client->buffer_lock --> &new->fa_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&new->fa_lock); local_irq_disable(); lock(&dev->event_lock); lock(&client->buffer_lock); lock(&dev->event_lock); *** DEADLOCK *** 7 locks held by syz-executor.4/10944: #0: ffff8880097d2110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x157/0x410 drivers/input/evdev.c:513 #1: ffff88800c342230 (&dev->event_lock){-...}-{2:2}, at: input_inject_event+0xa6/0x330 drivers/input/input.c:466 #2: ffffffff84df6660 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:53 [inline] #2: ffffffff84df6660 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:50 [inline] #2: ffffffff84df6660 (rcu_read_lock){....}-{1:2}, at: input_inject_event+0x92/0x330 drivers/input/input.c:465 #3: ffffffff84df6660 (rcu_read_lock){....}-{1:2}, at: input_pass_values.part.0+0x0/0x720 drivers/input/input.c:885 #4: ffffffff84df6660 (rcu_read_lock){....}-{1:2}, at: evdev_events+0x59/0x3e0 drivers/input/evdev.c:296 #5: ffff8880422b0028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline] #5: ffff8880422b0028 (&client->buffer_lock){....}-{2:2}, at: evdev_pass_values.part.0+0xf6/0x910 drivers/input/evdev.c:261 #6: ffffffff84df6660 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x3d/0x470 fs/fcntl.c:1023 the dependencies between HARDIRQ-irq-safe lock and the holding lock: -> (&dev->event_lock){-...}-{2:2} { IN-HARDIRQ-W at: lock_acquire kernel/locking/lockdep.c:5560 [inline] lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x36/0x50 kernel/locking/spinlock.c:159 input_event drivers/input/input.c:440 [inline] input_event+0x7b/0xb0 drivers/input/input.c:433 input_report_key include/linux/input.h:417 [inline] psmouse_report_standard_buttons+0x2c/0x80 drivers/input/mouse/psmouse-base.c:123 psmouse_report_standard_packet drivers/input/mouse/psmouse-base.c:141 [inline] psmouse_process_byte+0x39a/0x8b0 drivers/input/mouse/psmouse-base.c:232 psmouse_handle_byte+0x47/0x1b0 drivers/input/mouse/psmouse-base.c:274 psmouse_interrupt+0x2fa/0xea0 drivers/input/mouse/psmouse-base.c:426 serio_interrupt+0x8d/0x150 drivers/input/serio/serio.c:1002 i8042_interrupt+0x27e/0x520 drivers/input/serio/i8042.c:602 __handle_irq_event_percpu+0x2ef/0x820 kernel/irq/handle.c:156 handle_irq_event_percpu kernel/irq/handle.c:196 [inline] handle_irq_event+0x102/0x290 kernel/irq/handle.c:213 handle_edge_irq+0x249/0xd00 kernel/irq/chip.c:819 asm_call_irq_on_stack+0x12/0x20 __run_irq_on_irqstack arch/x86/include/asm/irq_stack.h:48 [inline] run_irq_on_irqstack_cond arch/x86/include/asm/irq_stack.h:101 [inline] handle_irq arch/x86/kernel/irq.c:230 [inline] __common_interrupt arch/x86/kernel/irq.c:249 [inline] common_interrupt+0xdd/0x190 arch/x86/kernel/irq.c:239 asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:626 native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline] arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0x25/0x40 kernel/locking/spinlock.c:191 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] i8042_command+0x12e/0x150 drivers/input/serio/i8042.c:352 i8042_aux_write+0xd7/0x120 drivers/input/serio/i8042.c:387 serio_write include/linux/serio.h:125 [inline] ps2_do_sendbyte+0x2d8/0x660 drivers/input/serio/libps2.c:40 ps2_sendbyte+0x4b/0x90 drivers/input/serio/libps2.c:92 cypress_ps2_sendbyte drivers/input/mouse/cypress_ps2.c:42 [inline] cypress_ps2_read_cmd_status drivers/input/mouse/cypress_ps2.c:116 [inline] cypress_send_ext_cmd+0x1c1/0x880 drivers/input/mouse/cypress_ps2.c:189 cypress_detect+0x75/0x190 drivers/input/mouse/cypress_ps2.c:205 psmouse_do_detect drivers/input/mouse/psmouse-base.c:1009 [inline] psmouse_try_protocol+0x20a/0x340 drivers/input/mouse/psmouse-base.c:1023 psmouse_extensions+0x557/0x920 drivers/input/mouse/psmouse-base.c:1146 psmouse_switch_protocol+0x53a/0x710 drivers/input/mouse/psmouse-base.c:1542 psmouse_connect+0x5e3/0xfd0 drivers/input/mouse/psmouse-base.c:1632 serio_connect_driver drivers/input/serio/serio.c:47 [inline] serio_driver_probe+0x77/0xa0 drivers/input/serio/serio.c:778 really_probe+0x288/0xd80 drivers/base/dd.c:559 driver_probe_device+0xfe/0x1d0 drivers/base/dd.c:745 __device_attach_driver+0x23a/0x330 drivers/base/dd.c:851 bus_for_each_drv+0x161/0x1e0 drivers/base/bus.c:431 __device_attach+0x21e/0x460 drivers/base/dd.c:919 bus_probe_device+0x1e6/0x290 drivers/base/bus.c:491 device_add+0xb16/0x1bc0 drivers/base/core.c:2963 serio_add_port drivers/input/serio/serio.c:542 [inline] serio_handle_event+0x480/0x900 drivers/input/serio/serio.c:210 process_one_work+0x9a9/0x1590 kernel/workqueue.c:2270 worker_thread+0x61d/0x1310 kernel/workqueue.c:2416 kthread+0x38f/0x470 kernel/kthread.c:292 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:296 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5560 [inline] lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x36/0x50 kernel/locking/spinlock.c:159 input_event drivers/input/input.c:440 [inline] input_event+0x7b/0xb0 drivers/input/input.c:433 input_report_key include/linux/input.h:417 [inline] psmouse_report_standard_buttons+0x2c/0x80 drivers/input/mouse/psmouse-base.c:123 psmouse_report_standard_packet drivers/input/mouse/psmouse-base.c:141 [inline] psmouse_process_byte+0x39a/0x8b0 drivers/input/mouse/psmouse-base.c:232 psmouse_handle_byte+0x47/0x1b0 drivers/input/mouse/psmouse-base.c:274 psmouse_interrupt+0x2fa/0xea0 drivers/input/mouse/psmouse-base.c:426 serio_interrupt+0x8d/0x150 drivers/input/serio/serio.c:1002 i8042_interrupt+0x27e/0x520 drivers/input/serio/i8042.c:602 __handle_irq_event_percpu+0x2ef/0x820 kernel/irq/handle.c:156 handle_irq_event_percpu kernel/irq/handle.c:196 [inline] handle_irq_event+0x102/0x290 kernel/irq/handle.c:213 handle_edge_irq+0x249/0xd00 kernel/irq/chip.c:819 asm_call_irq_on_stack+0x12/0x20 __run_irq_on_irqstack arch/x86/include/asm/irq_stack.h:48 [inline] run_irq_on_irqstack_cond arch/x86/include/asm/irq_stack.h:101 [inline] handle_irq arch/x86/kernel/irq.c:230 [inline] __common_interrupt arch/x86/kernel/irq.c:249 [inline] common_interrupt+0xdd/0x190 arch/x86/kernel/irq.c:239 asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:626 native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline] arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0x25/0x40 kernel/locking/spinlock.c:191 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] i8042_command+0x12e/0x150 drivers/input/serio/i8042.c:352 i8042_aux_write+0xd7/0x120 drivers/input/serio/i8042.c:387 serio_write include/linux/serio.h:125 [inline] ps2_do_sendbyte+0x2d8/0x660 drivers/input/serio/libps2.c:40 ps2_sendbyte+0x4b/0x90 drivers/input/serio/libps2.c:92 cypress_ps2_sendbyte drivers/input/mouse/cypress_ps2.c:42 [inline] cypress_ps2_read_cmd_status drivers/input/mouse/cypress_ps2.c:116 [inline] cypress_send_ext_cmd+0x1c1/0x880 drivers/input/mouse/cypress_ps2.c:189 cypress_detect+0x75/0x190 drivers/input/mouse/cypress_ps2.c:205 psmouse_do_detect drivers/input/mouse/psmouse-base.c:1009 [inline] psmouse_try_protocol+0x20a/0x340 drivers/input/mouse/psmouse-base.c:1023 psmouse_extensions+0x557/0x920 drivers/input/mouse/psmouse-base.c:1146 psmouse_switch_protocol+0x53a/0x710 drivers/input/mouse/psmouse-base.c:1542 psmouse_connect+0x5e3/0xfd0 drivers/input/mouse/psmouse-base.c:1632 serio_connect_driver drivers/input/serio/serio.c:47 [inline] serio_driver_probe+0x77/0xa0 drivers/input/serio/serio.c:778 really_probe+0x288/0xd80 drivers/base/dd.c:559 driver_probe_device+0xfe/0x1d0 drivers/base/dd.c:745 __device_attach_driver+0x23a/0x330 drivers/base/dd.c:851 bus_for_each_drv+0x161/0x1e0 drivers/base/bus.c:431 __device_attach+0x21e/0x460 drivers/base/dd.c:919 bus_probe_device+0x1e6/0x290 drivers/base/bus.c:491 device_add+0xb16/0x1bc0 drivers/base/core.c:2963 serio_add_port drivers/input/serio/serio.c:542 [inline] serio_handle_event+0x480/0x900 drivers/input/serio/serio.c:210 process_one_work+0x9a9/0x1590 kernel/workqueue.c:2270 worker_thread+0x61d/0x1310 kernel/workqueue.c:2416 kthread+0x38f/0x470 kernel/kthread.c:292 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:296 } ... key at: [] __key.5+0x0/0x40 -> (&client->buffer_lock){....}-{2:2} { INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5560 [inline] lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x27/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] evdev_pass_values.part.0+0xf6/0x910 drivers/input/evdev.c:261 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x366/0x3e0 drivers/input/evdev.c:306 input_to_handler+0x297/0x4c0 drivers/input/input.c:115 input_pass_values.part.0+0x239/0x720 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0x3b7/0x1470 drivers/input/input.c:399 input_inject_event+0x1ca/0x330 drivers/input/input.c:471 evdev_write+0x2d5/0x410 drivers/input/evdev.c:530 vfs_write+0x29a/0xa20 fs/read_write.c:603 ksys_write+0x1ee/0x250 fs/read_write.c:658 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 } ... key at: [] __key.4+0x0/0x40 ... acquired at: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x27/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] evdev_pass_values.part.0+0xf6/0x910 drivers/input/evdev.c:261 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x366/0x3e0 drivers/input/evdev.c:306 input_to_handler+0x297/0x4c0 drivers/input/input.c:115 input_pass_values.part.0+0x239/0x720 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0x3b7/0x1470 drivers/input/input.c:399 input_inject_event+0x1ca/0x330 drivers/input/input.c:471 evdev_write+0x2d5/0x410 drivers/input/evdev.c:530 vfs_write+0x29a/0xa20 fs/read_write.c:603 ksys_write+0x1ee/0x250 fs/read_write.c:658 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock: -> (&new->fa_lock){.+.+}-{2:2} { HARDIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5560 [inline] lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x58/0x70 kernel/locking/spinlock.c:223 kill_fasync_rcu fs/fcntl.c:1004 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0x134/0x470 fs/fcntl.c:1018 wakeup_pipe_writers fs/splice.c:373 [inline] splice_from_pipe_end fs/splice.c:536 [inline] __splice_from_pipe+0x69e/0x840 fs/splice.c:564 splice_from_pipe fs/splice.c:597 [inline] generic_splice_sendpage+0xd5/0x140 fs/splice.c:743 do_splice_from fs/splice.c:764 [inline] do_splice+0xba6/0x1ab0 fs/splice.c:1059 __do_splice+0x134/0x250 fs/splice.c:1137 __do_sys_splice fs/splice.c:1343 [inline] __se_sys_splice fs/splice.c:1325 [inline] __x64_sys_splice+0x19c/0x250 fs/splice.c:1325 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 SOFTIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5560 [inline] lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x58/0x70 kernel/locking/spinlock.c:223 kill_fasync_rcu fs/fcntl.c:1004 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0x134/0x470 fs/fcntl.c:1018 wakeup_pipe_writers fs/splice.c:373 [inline] splice_from_pipe_end fs/splice.c:536 [inline] __splice_from_pipe+0x69e/0x840 fs/splice.c:564 splice_from_pipe fs/splice.c:597 [inline] generic_splice_sendpage+0xd5/0x140 fs/splice.c:743 do_splice_from fs/splice.c:764 [inline] do_splice+0xba6/0x1ab0 fs/splice.c:1059 __do_splice+0x134/0x250 fs/splice.c:1137 __do_sys_splice fs/splice.c:1343 [inline] __se_sys_splice fs/splice.c:1325 [inline] __x64_sys_splice+0x19c/0x250 fs/splice.c:1325 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5560 [inline] lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525 __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline] _raw_write_lock_irq+0x2f/0x40 kernel/locking/spinlock.c:311 fasync_remove_entry+0xb6/0x1f0 fs/fcntl.c:882 fasync_helper+0x9e/0xb0 fs/fcntl.c:985 pipe_fasync+0xda/0x230 fs/pipe.c:732 __fput+0x743/0x980 fs/file_table.c:278 task_work_run+0xe2/0x1a0 kernel/task_work.c:151 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0x155/0x160 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x38/0x230 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x44/0xa9 INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5560 [inline] lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x58/0x70 kernel/locking/spinlock.c:223 kill_fasync_rcu fs/fcntl.c:1004 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0x134/0x470 fs/fcntl.c:1018 wakeup_pipe_writers fs/splice.c:373 [inline] splice_from_pipe_end fs/splice.c:536 [inline] __splice_from_pipe+0x69e/0x840 fs/splice.c:564 splice_from_pipe fs/splice.c:597 [inline] generic_splice_sendpage+0xd5/0x140 fs/splice.c:743 do_splice_from fs/splice.c:764 [inline] do_splice+0xba6/0x1ab0 fs/splice.c:1059 __do_splice+0x134/0x250 fs/splice.c:1137 __do_sys_splice fs/splice.c:1343 [inline] __se_sys_splice fs/splice.c:1325 [inline] __x64_sys_splice+0x19c/0x250 fs/splice.c:1325 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 } ... key at: [] __key.0+0x0/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5560 [inline] lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x58/0x70 kernel/locking/spinlock.c:223 kill_fasync_rcu fs/fcntl.c:1004 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0x134/0x470 fs/fcntl.c:1018 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values.part.0+0x639/0x910 drivers/input/evdev.c:278 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x366/0x3e0 drivers/input/evdev.c:306 input_to_handler+0x297/0x4c0 drivers/input/input.c:115 input_pass_values.part.0+0x239/0x720 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0x3b7/0x1470 drivers/input/input.c:399 input_inject_event+0x1ca/0x330 drivers/input/input.c:471 evdev_write+0x2d5/0x410 drivers/input/evdev.c:530 vfs_write+0x29a/0xa20 fs/read_write.c:603 ksys_write+0x1ee/0x250 fs/read_write.c:658 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 stack backtrace: CPU: 0 PID: 10944 Comm: syz-executor.4 Not tainted 5.10.52 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:118 print_bad_irq_dependency kernel/locking/lockdep.c:2559 [inline] check_irq_usage.cold+0x481/0x58d kernel/locking/lockdep.c:2798 check_prev_add kernel/locking/lockdep.c:2989 [inline] check_prevs_add kernel/locking/lockdep.c:3110 [inline] validate_chain kernel/locking/lockdep.c:3725 [inline] __lock_acquire+0x2a0e/0x5b20 kernel/locking/lockdep.c:4950 lock_acquire kernel/locking/lockdep.c:5560 [inline] lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x58/0x70 kernel/locking/spinlock.c:223 kill_fasync_rcu fs/fcntl.c:1004 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0x134/0x470 fs/fcntl.c:1018 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values.part.0+0x639/0x910 drivers/input/evdev.c:278 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x366/0x3e0 drivers/input/evdev.c:306 input_to_handler+0x297/0x4c0 drivers/input/input.c:115 input_pass_values.part.0+0x239/0x720 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0x3b7/0x1470 drivers/input/input.c:399 input_inject_event+0x1ca/0x330 drivers/input/input.c:471 evdev_write+0x2d5/0x410 drivers/input/evdev.c:530 vfs_write+0x29a/0xa20 fs/read_write.c:603 ksys_write+0x1ee/0x250 fs/read_write.c:658 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x466609 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc6326b4188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 0000000000466609 RDX: 000000000000fec4 RSI: 0000000020000100 RDI: 0000000000000005 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffe5f6d96af R14: 00007fc6326b4300 R15: 0000000000022000