===================================================== WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected 5.11.0-syzkaller #0 Not tainted ----------------------------------------------------- syz-executor.0/5893 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffff8880192850c0 (&new->fa_lock){.+.+}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1004 [inline] ffff8880192850c0 (&new->fa_lock){.+.+}-{2:2}, at: kill_fasync fs/fcntl.c:1025 [inline] ffff8880192850c0 (&new->fa_lock){.+.+}-{2:2}, at: kill_fasync+0xec/0x310 fs/fcntl.c:1018 and this task is already holding: ffff88801028a028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline] ffff88801028a028 (&client->buffer_lock){....}-{2:2}, at: evdev_pass_values.part.0+0xef/0xb10 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:5442 [inline] lock_acquire+0x1a8/0x720 kernel/locking/lockdep.c:5407 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:159 input_event drivers/input/input.c:445 [inline] input_event+0x41/0x80 drivers/input/input.c:438 input_report_key include/linux/input.h:425 [inline] psmouse_report_standard_buttons+0x1b/0x50 drivers/input/mouse/psmouse-base.c:123 psmouse_report_standard_packet drivers/input/mouse/psmouse-base.c:141 [inline] psmouse_process_byte+0x1ae/0x7a0 drivers/input/mouse/psmouse-base.c:232 psmouse_handle_byte+0x3c/0x180 drivers/input/mouse/psmouse-base.c:274 psmouse_interrupt+0x22b/0xd60 drivers/input/mouse/psmouse-base.c:426 serio_interrupt+0x7e/0x110 drivers/input/serio/serio.c:1002 i8042_interrupt+0x17b/0x410 drivers/input/serio/i8042.c:602 __handle_irq_event_percpu+0x256/0x680 kernel/irq/handle.c:156 handle_irq_event_percpu kernel/irq/handle.c:196 [inline] handle_irq_event+0xfa/0x260 kernel/irq/handle.c:213 handle_edge_irq+0x203/0xb50 kernel/irq/chip.c:819 asm_call_irq_on_stack+0xf/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+0x120/0x200 arch/x86/kernel/irq.c:239 asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:620 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+0x25/0x50 kernel/locking/spinlock.c:191 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] i8042_command+0x8b/0xb0 drivers/input/serio/i8042.c:352 i8042_aux_write+0xb1/0x100 drivers/input/serio/i8042.c:387 serio_write include/linux/serio.h:125 [inline] ps2_do_sendbyte+0x1f2/0x5a0 drivers/input/serio/libps2.c:40 ps2_sendbyte+0x53/0x140 drivers/input/serio/libps2.c:92 cypress_ps2_sendbyte+0x21/0x130 drivers/input/mouse/cypress_ps2.c:42 cypress_ps2_read_cmd_status drivers/input/mouse/cypress_ps2.c:116 [inline] cypress_send_ext_cmd+0x1ae/0x7b0 drivers/input/mouse/cypress_ps2.c:189 cypress_detect+0x6c/0x130 drivers/input/mouse/cypress_ps2.c:205 psmouse_do_detect drivers/input/mouse/psmouse-base.c:1009 [inline] psmouse_try_protocol+0x194/0x3a0 drivers/input/mouse/psmouse-base.c:1023 psmouse_extensions+0x3f8/0x680 drivers/input/mouse/psmouse-base.c:1146 psmouse_switch_protocol+0x4a2/0x690 drivers/input/mouse/psmouse-base.c:1542 psmouse_connect+0x57b/0xe70 drivers/input/mouse/psmouse-base.c:1632 serio_connect_driver drivers/input/serio/serio.c:47 [inline] serio_driver_probe+0x6d/0xa0 drivers/input/serio/serio.c:778 really_probe+0x1fd/0xc60 drivers/base/dd.c:554 driver_probe_device+0x1ed/0x380 drivers/base/dd.c:740 device_driver_attach+0x1da/0x240 drivers/base/dd.c:1015 __driver_attach+0xee/0x260 drivers/base/dd.c:1092 bus_for_each_dev+0x119/0x1a0 drivers/base/bus.c:305 serio_attach_driver drivers/input/serio/serio.c:808 [inline] serio_handle_event+0x48f/0x750 drivers/input/serio/serio.c:227 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275 worker_thread+0x598/0xf80 kernel/workqueue.c:2421 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/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:5442 [inline] lock_acquire+0x1a8/0x720 kernel/locking/lockdep.c:5407 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223 kill_fasync_rcu fs/fcntl.c:1004 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0xec/0x310 fs/fcntl.c:1018 sock_wake_async+0xce/0x110 net/socket.c:1310 sk_wake_async include/net/sock.h:2286 [inline] sk_wake_async include/net/sock.h:2282 [inline] sock_def_readable+0x1cc/0x340 net/core/sock.c:2904 unix_dgram_sendmsg+0xcad/0x1710 net/unix/af_unix.c:1799 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:672 ____sys_sendmsg+0x392/0x7a0 net/socket.c:2345 ___sys_sendmsg+0xd3/0x150 net/socket.c:2399 __sys_sendmmsg+0x141/0x300 net/socket.c:2489 __do_sys_sendmmsg net/socket.c:2518 [inline] __se_sys_sendmmsg net/socket.c:2515 [inline] __x64_sys_sendmmsg+0x94/0x100 net/socket.c:2515 do_syscall_64+0x2d/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.0/5893: #0: ffff888147364110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x121/0x350 drivers/input/evdev.c:513 #1: ffff888145b70230 (&dev->event_lock){-...}-{2:2}, at: input_inject_event+0x6c/0x220 drivers/input/input.c:471 #2: ffffffff8a76ac00 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:53 [inline] #2: ffffffff8a76ac00 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:50 [inline] #2: ffffffff8a76ac00 (rcu_read_lock){....}-{1:2}, at: input_inject_event+0x5d/0x220 drivers/input/input.c:470 #3: ffffffff8a76ac00 (rcu_read_lock){....}-{1:2}, at: input_pass_values.part.0+0x0/0x550 drivers/input/input.c:837 #4: ffffffff8a76ac00 (rcu_read_lock){....}-{1:2}, at: evdev_events+0x50/0x2f0 drivers/input/evdev.c:296 #5: ffff88801028a028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline] #5: ffff88801028a028 (&client->buffer_lock){....}-{2:2}, at: evdev_pass_values.part.0+0xef/0xb10 drivers/input/evdev.c:261 #6: ffffffff8a76ac00 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x36/0x310 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:5442 [inline] lock_acquire+0x1a8/0x720 kernel/locking/lockdep.c:5407 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:159 input_event drivers/input/input.c:445 [inline] input_event+0x41/0x80 drivers/input/input.c:438 input_report_key include/linux/input.h:425 [inline] psmouse_report_standard_buttons+0x1b/0x50 drivers/input/mouse/psmouse-base.c:123 psmouse_report_standard_packet drivers/input/mouse/psmouse-base.c:141 [inline] psmouse_process_byte+0x1ae/0x7a0 drivers/input/mouse/psmouse-base.c:232 psmouse_handle_byte+0x3c/0x180 drivers/input/mouse/psmouse-base.c:274 psmouse_interrupt+0x22b/0xd60 drivers/input/mouse/psmouse-base.c:426 serio_interrupt+0x7e/0x110 drivers/input/serio/serio.c:1002 i8042_interrupt+0x17b/0x410 drivers/input/serio/i8042.c:602 __handle_irq_event_percpu+0x256/0x680 kernel/irq/handle.c:156 handle_irq_event_percpu kernel/irq/handle.c:196 [inline] handle_irq_event+0xfa/0x260 kernel/irq/handle.c:213 handle_edge_irq+0x203/0xb50 kernel/irq/chip.c:819 asm_call_irq_on_stack+0xf/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+0x120/0x200 arch/x86/kernel/irq.c:239 asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:620 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+0x25/0x50 kernel/locking/spinlock.c:191 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] i8042_command+0x8b/0xb0 drivers/input/serio/i8042.c:352 i8042_aux_write+0xb1/0x100 drivers/input/serio/i8042.c:387 serio_write include/linux/serio.h:125 [inline] ps2_do_sendbyte+0x1f2/0x5a0 drivers/input/serio/libps2.c:40 ps2_sendbyte+0x53/0x140 drivers/input/serio/libps2.c:92 cypress_ps2_sendbyte+0x21/0x130 drivers/input/mouse/cypress_ps2.c:42 cypress_ps2_read_cmd_status drivers/input/mouse/cypress_ps2.c:116 [inline] cypress_send_ext_cmd+0x1ae/0x7b0 drivers/input/mouse/cypress_ps2.c:189 cypress_detect+0x6c/0x130 drivers/input/mouse/cypress_ps2.c:205 psmouse_do_detect drivers/input/mouse/psmouse-base.c:1009 [inline] psmouse_try_protocol+0x194/0x3a0 drivers/input/mouse/psmouse-base.c:1023 psmouse_extensions+0x3f8/0x680 drivers/input/mouse/psmouse-base.c:1146 psmouse_switch_protocol+0x4a2/0x690 drivers/input/mouse/psmouse-base.c:1542 psmouse_connect+0x57b/0xe70 drivers/input/mouse/psmouse-base.c:1632 serio_connect_driver drivers/input/serio/serio.c:47 [inline] serio_driver_probe+0x6d/0xa0 drivers/input/serio/serio.c:778 really_probe+0x1fd/0xc60 drivers/base/dd.c:554 driver_probe_device+0x1ed/0x380 drivers/base/dd.c:740 device_driver_attach+0x1da/0x240 drivers/base/dd.c:1015 __driver_attach+0xee/0x260 drivers/base/dd.c:1092 bus_for_each_dev+0x119/0x1a0 drivers/base/bus.c:305 serio_attach_driver drivers/input/serio/serio.c:808 [inline] serio_handle_event+0x48f/0x750 drivers/input/serio/serio.c:227 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275 worker_thread+0x598/0xf80 kernel/workqueue.c:2421 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5442 [inline] lock_acquire+0x1a8/0x720 kernel/locking/lockdep.c:5407 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:159 input_inject_event+0x6c/0x220 drivers/input/input.c:471 led_trigger_event drivers/leds/led-triggers.c:388 [inline] led_trigger_event+0x66/0xc0 drivers/leds/led-triggers.c:377 kbd_led_trigger_activate+0xb3/0xf0 drivers/tty/vt/keyboard.c:1017 led_trigger_set+0x5ae/0xbe0 drivers/leds/led-triggers.c:195 led_trigger_set_default drivers/leds/led-triggers.c:259 [inline] led_trigger_set_default+0x167/0x200 drivers/leds/led-triggers.c:246 led_classdev_register_ext+0x4d7/0x710 drivers/leds/led-class.c:417 led_classdev_register include/linux/leds.h:190 [inline] input_leds_connect+0x351/0x750 drivers/input/input-leds.c:139 input_attach_handler+0xfb/0x150 drivers/input/input.c:1035 input_register_device.cold+0xb7/0x29a drivers/input/input.c:2335 atkbd_connect+0x669/0x8e0 drivers/input/keyboard/atkbd.c:1293 serio_connect_driver drivers/input/serio/serio.c:47 [inline] serio_driver_probe+0x6d/0xa0 drivers/input/serio/serio.c:778 really_probe+0x1fd/0xc60 drivers/base/dd.c:554 driver_probe_device+0x1ed/0x380 drivers/base/dd.c:740 device_driver_attach+0x1da/0x240 drivers/base/dd.c:1015 __driver_attach+0xee/0x260 drivers/base/dd.c:1092 bus_for_each_dev+0x119/0x1a0 drivers/base/bus.c:305 serio_attach_driver drivers/input/serio/serio.c:808 [inline] serio_handle_event+0x48f/0x750 drivers/input/serio/serio.c:227 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275 worker_thread+0x598/0xf80 kernel/workqueue.c:2421 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 } ... key at: [] __key.8+0x0/0x40 ... acquired at: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] evdev_pass_values.part.0+0xef/0xb10 drivers/input/evdev.c:261 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x1d5/0x2f0 drivers/input/evdev.c:306 input_to_handler+0x23d/0x4a0 drivers/input/input.c:115 input_pass_values.part.0+0x1be/0x550 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0xc18/0x1160 drivers/input/input.c:404 input_inject_event+0x200/0x220 drivers/input/input.c:476 evdev_write+0x253/0x350 drivers/input/evdev.c:530 vfs_write+0x1c4/0x870 fs/read_write.c:603 ksys_write+0x171/0x1d0 fs/read_write.c:658 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 -> (&client->buffer_lock){....}-{2:2} { INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5442 [inline] lock_acquire+0x1a8/0x720 kernel/locking/lockdep.c:5407 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] evdev_pass_values.part.0+0xef/0xb10 drivers/input/evdev.c:261 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x1d5/0x2f0 drivers/input/evdev.c:306 input_to_handler+0x23d/0x4a0 drivers/input/input.c:115 input_pass_values.part.0+0x1be/0x550 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0xc18/0x1160 drivers/input/input.c:404 input_inject_event+0x200/0x220 drivers/input/input.c:476 evdev_write+0x253/0x350 drivers/input/evdev.c:530 vfs_write+0x1c4/0x870 fs/read_write.c:603 ksys_write+0x171/0x1d0 fs/read_write.c:658 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 } ... key at: [] __key.4+0x0/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5442 [inline] lock_acquire+0x1a8/0x720 kernel/locking/lockdep.c:5407 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223 kill_fasync_rcu fs/fcntl.c:1004 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0xec/0x310 fs/fcntl.c:1018 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values.part.0+0x57b/0xb10 drivers/input/evdev.c:278 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x1d5/0x2f0 drivers/input/evdev.c:306 input_to_handler+0x23d/0x4a0 drivers/input/input.c:115 input_pass_values.part.0+0x1be/0x550 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0xc18/0x1160 drivers/input/input.c:404 input_inject_event+0x200/0x220 drivers/input/input.c:476 evdev_write+0x253/0x350 drivers/input/evdev.c:530 vfs_write+0x1c4/0x870 fs/read_write.c:603 ksys_write+0x171/0x1d0 fs/read_write.c:658 do_syscall_64+0x2d/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:5442 [inline] lock_acquire+0x1a8/0x720 kernel/locking/lockdep.c:5407 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223 kill_fasync_rcu fs/fcntl.c:1004 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0xec/0x310 fs/fcntl.c:1018 sock_wake_async+0xce/0x110 net/socket.c:1310 sk_wake_async include/net/sock.h:2286 [inline] sk_wake_async include/net/sock.h:2282 [inline] sock_def_readable+0x1cc/0x340 net/core/sock.c:2904 unix_dgram_sendmsg+0xcad/0x1710 net/unix/af_unix.c:1799 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:672 ____sys_sendmsg+0x392/0x7a0 net/socket.c:2345 ___sys_sendmsg+0xd3/0x150 net/socket.c:2399 __sys_sendmmsg+0x141/0x300 net/socket.c:2489 __do_sys_sendmmsg net/socket.c:2518 [inline] __se_sys_sendmmsg net/socket.c:2515 [inline] __x64_sys_sendmmsg+0x94/0x100 net/socket.c:2515 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 SOFTIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5442 [inline] lock_acquire+0x1a8/0x720 kernel/locking/lockdep.c:5407 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223 kill_fasync_rcu fs/fcntl.c:1004 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0xec/0x310 fs/fcntl.c:1018 sock_wake_async+0xce/0x110 net/socket.c:1310 sk_wake_async include/net/sock.h:2286 [inline] sk_wake_async include/net/sock.h:2282 [inline] sock_def_readable+0x1cc/0x340 net/core/sock.c:2904 unix_dgram_sendmsg+0xcad/0x1710 net/unix/af_unix.c:1799 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:672 ____sys_sendmsg+0x392/0x7a0 net/socket.c:2345 ___sys_sendmsg+0xd3/0x150 net/socket.c:2399 __sys_sendmmsg+0x141/0x300 net/socket.c:2489 __do_sys_sendmmsg net/socket.c:2518 [inline] __se_sys_sendmmsg net/socket.c:2515 [inline] __x64_sys_sendmmsg+0x94/0x100 net/socket.c:2515 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5442 [inline] lock_acquire+0x1a8/0x720 kernel/locking/lockdep.c:5407 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223 kill_fasync_rcu fs/fcntl.c:1004 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0xec/0x310 fs/fcntl.c:1018 sock_wake_async+0xce/0x110 net/socket.c:1310 sk_wake_async include/net/sock.h:2286 [inline] sk_wake_async include/net/sock.h:2282 [inline] sock_def_readable+0x1cc/0x340 net/core/sock.c:2904 unix_dgram_sendmsg+0xcad/0x1710 net/unix/af_unix.c:1799 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:672 ____sys_sendmsg+0x392/0x7a0 net/socket.c:2345 ___sys_sendmsg+0xd3/0x150 net/socket.c:2399 __sys_sendmmsg+0x141/0x300 net/socket.c:2489 __do_sys_sendmmsg net/socket.c:2518 [inline] __se_sys_sendmmsg net/socket.c:2515 [inline] __x64_sys_sendmmsg+0x94/0x100 net/socket.c:2515 do_syscall_64+0x2d/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:5442 [inline] lock_acquire+0x1a8/0x720 kernel/locking/lockdep.c:5407 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223 kill_fasync_rcu fs/fcntl.c:1004 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0xec/0x310 fs/fcntl.c:1018 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values.part.0+0x57b/0xb10 drivers/input/evdev.c:278 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x1d5/0x2f0 drivers/input/evdev.c:306 input_to_handler+0x23d/0x4a0 drivers/input/input.c:115 input_pass_values.part.0+0x1be/0x550 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0xc18/0x1160 drivers/input/input.c:404 input_inject_event+0x200/0x220 drivers/input/input.c:476 evdev_write+0x253/0x350 drivers/input/evdev.c:530 vfs_write+0x1c4/0x870 fs/read_write.c:603 ksys_write+0x171/0x1d0 fs/read_write.c:658 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 stack backtrace: CPU: 0 PID: 5893 Comm: syz-executor.0 Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x9a/0xcc lib/dump_stack.c:120 print_bad_irq_dependency kernel/locking/lockdep.c:2452 [inline] check_irq_usage.cold+0x50d/0x744 kernel/locking/lockdep.c:2681 check_prev_add kernel/locking/lockdep.c:2872 [inline] check_prevs_add kernel/locking/lockdep.c:2993 [inline] validate_chain kernel/locking/lockdep.c:3608 [inline] __lock_acquire+0x2b51/0x57d0 kernel/locking/lockdep.c:4832 lock_acquire kernel/locking/lockdep.c:5442 [inline] lock_acquire+0x1a8/0x720 kernel/locking/lockdep.c:5407 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223 kill_fasync_rcu fs/fcntl.c:1004 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0xec/0x310 fs/fcntl.c:1018 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values.part.0+0x57b/0xb10 drivers/input/evdev.c:278 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x1d5/0x2f0 drivers/input/evdev.c:306 input_to_handler+0x23d/0x4a0 drivers/input/input.c:115 input_pass_values.part.0+0x1be/0x550 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0xc18/0x1160 drivers/input/input.c:404 input_inject_event+0x200/0x220 drivers/input/input.c:476 evdev_write+0x253/0x350 drivers/input/evdev.c:530 vfs_write+0x1c4/0x870 fs/read_write.c:603 ksys_write+0x171/0x1d0 fs/read_write.c:658 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7feb5f455109 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007feb5ebca168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007feb5f567f60 RCX: 00007feb5f455109 RDX: 0000000000003888 RSI: 0000000020000080 RDI: 0000000000000005 RBP: 00007feb5f4af08d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff907a2faf R14: 00007feb5ebca300 R15: 0000000000022000