===================================================== WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected 5.11.0-rc1-syzkaller #0 Not tainted ----------------------------------------------------- syz-executor.1/17505 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffff888029bfcb38 (&f->f_owner.lock){.+.?}-{2:2}, at: send_sigio+0x24/0x360 fs/fcntl.c:787 and this task is already holding: ffff888021487018 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1004 [inline] ffff888021487018 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1025 [inline] ffff888021487018 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x14b/0x460 fs/fcntl.c:1018 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} ... which became HARDIRQ-irq-safe at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402 __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+0x7b/0xb0 drivers/input/input.c:438 input_report_key include/linux/input.h:425 [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+0x1e1/0x890 drivers/input/mouse/psmouse-base.c:232 psmouse_handle_byte+0x41/0x1b0 drivers/input/mouse/psmouse-base.c:274 psmouse_interrupt+0x304/0xf00 drivers/input/mouse/psmouse-base.c:426 serio_interrupt+0x88/0x150 drivers/input/serio/serio.c:1002 i8042_interrupt+0x27a/0x520 drivers/input/serio/i8042.c:602 __handle_irq_event_percpu+0x303/0x8f0 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+0x25f/0xd00 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:619 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+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+0x2ca/0x710 drivers/input/serio/libps2.c:40 ps2_sendbyte+0x58/0x150 drivers/input/serio/libps2.c:92 cypress_ps2_sendbyte+0x2e/0x160 drivers/input/mouse/cypress_ps2.c:42 cypress_ps2_read_cmd_status drivers/input/mouse/cypress_ps2.c:116 [inline] cypress_send_ext_cmd+0x1d0/0x8d0 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+0x211/0x370 drivers/input/mouse/psmouse-base.c:1023 psmouse_extensions+0x557/0x930 drivers/input/mouse/psmouse-base.c:1146 psmouse_switch_protocol+0x52a/0x740 drivers/input/mouse/psmouse-base.c:1542 psmouse_connect+0x5e6/0xfc0 drivers/input/mouse/psmouse-base.c:1632 serio_connect_driver drivers/input/serio/serio.c:47 [inline] serio_driver_probe+0x72/0xa0 drivers/input/serio/serio.c:778 really_probe+0x291/0xde0 drivers/base/dd.c:561 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:745 device_driver_attach+0x228/0x290 drivers/base/dd.c:1020 __driver_attach+0x15b/0x2f0 drivers/base/dd.c:1097 bus_for_each_dev+0x147/0x1d0 drivers/base/bus.c:305 serio_attach_driver drivers/input/serio/serio.c:808 [inline] serio_handle_event+0x5f6/0xa30 drivers/input/serio/serio.c:227 process_one_work+0x98d/0x15f0 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 to a HARDIRQ-irq-unsafe lock: (&f->f_owner.lock){.+.?}-{2:2} ... which became HARDIRQ-irq-unsafe at: ... lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223 f_getown+0x1b/0xb0 fs/fcntl.c:152 sock_ioctl+0x4ba/0x6a0 net/socket.c:1122 compat_sock_ioctl_trans net/socket.c:3425 [inline] compat_sock_ioctl+0x3bb/0x1d30 net/socket.c:3498 __do_compat_sys_ioctl+0x1d3/0x230 fs/ioctl.c:842 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c other info that might help us debug this: Chain exists of: &dev->event_lock --> &new->fa_lock --> &f->f_owner.lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&f->f_owner.lock); local_irq_disable(); lock(&dev->event_lock); lock(&new->fa_lock); lock(&dev->event_lock); *** DEADLOCK *** 8 locks held by syz-executor.1/17505: #0: ffff88801cf11110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x1d3/0x760 drivers/input/evdev.c:513 #1: ffff888144e0c230 (&dev->event_lock){-.-.}-{2:2}, at: input_inject_event+0xa6/0x310 drivers/input/input.c:471 #2: ffffffff8b363860 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:53 [inline] #2: ffffffff8b363860 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:50 [inline] #2: ffffffff8b363860 (rcu_read_lock){....}-{1:2}, at: input_inject_event+0x92/0x310 drivers/input/input.c:470 #3: ffffffff8b363860 (rcu_read_lock){....}-{1:2}, at: input_pass_values.part.0+0x0/0x700 drivers/input/input.c:837 #4: ffffffff8b363860 (rcu_read_lock){....}-{1:2}, at: evdev_events+0x59/0x3f0 drivers/input/evdev.c:296 #5: ffff888062755028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline] #5: ffff888062755028 (&client->buffer_lock){....}-{2:2}, at: evdev_pass_values.part.0+0xf6/0x970 drivers/input/evdev.c:261 #6: ffffffff8b363860 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x3d/0x460 fs/fcntl.c:1023 #7: ffff888021487018 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1004 [inline] #7: ffff888021487018 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1025 [inline] #7: ffff888021487018 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x14b/0x460 fs/fcntl.c:1018 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:5437 [inline] lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402 __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+0x7b/0xb0 drivers/input/input.c:438 input_report_key include/linux/input.h:425 [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+0x1e1/0x890 drivers/input/mouse/psmouse-base.c:232 psmouse_handle_byte+0x41/0x1b0 drivers/input/mouse/psmouse-base.c:274 psmouse_interrupt+0x304/0xf00 drivers/input/mouse/psmouse-base.c:426 serio_interrupt+0x88/0x150 drivers/input/serio/serio.c:1002 i8042_interrupt+0x27a/0x520 drivers/input/serio/i8042.c:602 __handle_irq_event_percpu+0x303/0x8f0 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+0x25f/0xd00 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:619 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+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+0x2ca/0x710 drivers/input/serio/libps2.c:40 ps2_sendbyte+0x58/0x150 drivers/input/serio/libps2.c:92 cypress_ps2_sendbyte+0x2e/0x160 drivers/input/mouse/cypress_ps2.c:42 cypress_ps2_read_cmd_status drivers/input/mouse/cypress_ps2.c:116 [inline] cypress_send_ext_cmd+0x1d0/0x8d0 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+0x211/0x370 drivers/input/mouse/psmouse-base.c:1023 psmouse_extensions+0x557/0x930 drivers/input/mouse/psmouse-base.c:1146 psmouse_switch_protocol+0x52a/0x740 drivers/input/mouse/psmouse-base.c:1542 psmouse_connect+0x5e6/0xfc0 drivers/input/mouse/psmouse-base.c:1632 serio_connect_driver drivers/input/serio/serio.c:47 [inline] serio_driver_probe+0x72/0xa0 drivers/input/serio/serio.c:778 really_probe+0x291/0xde0 drivers/base/dd.c:561 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:745 device_driver_attach+0x228/0x290 drivers/base/dd.c:1020 __driver_attach+0x15b/0x2f0 drivers/base/dd.c:1097 bus_for_each_dev+0x147/0x1d0 drivers/base/bus.c:305 serio_attach_driver drivers/input/serio/serio.c:808 [inline] serio_handle_event+0x5f6/0xa30 drivers/input/serio/serio.c:227 process_one_work+0x98d/0x15f0 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 IN-SOFTIRQ-W at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402 __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+0xa6/0x310 drivers/input/input.c:471 kd_sound_helper+0x122/0x260 drivers/tty/vt/keyboard.c:252 input_handler_for_each_handle+0xf4/0x210 drivers/input/input.c:2462 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1417 expire_timers kernel/time/timer.c:1462 [inline] __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1731 __run_timers kernel/time/timer.c:1712 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744 __do_softirq+0x2a5/0x9f7 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu kernel/softirq.c:420 [inline] irq_exit_rcu+0x134/0x200 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 __sanitizer_cov_trace_pc+0xd/0x60 kernel/kcov.c:193 rcu_read_lock include/linux/rcupdate.h:643 [inline] batadv_nc_process_nc_paths.part.0+0x106/0x3b0 net/batman-adv/network-coding.c:683 batadv_nc_process_nc_paths net/batman-adv/network-coding.c:675 [inline] batadv_nc_worker+0xb90/0xe50 net/batman-adv/network-coding.c:731 process_one_work+0x98d/0x15f0 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 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:5437 [inline] lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402 __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+0xa6/0x310 drivers/input/input.c:471 __led_set_brightness drivers/leds/led-core.c:48 [inline] led_set_brightness_nopm drivers/leds/led-core.c:275 [inline] led_set_brightness_nosleep+0xe6/0x1a0 drivers/leds/led-core.c:292 led_set_brightness+0x134/0x170 drivers/leds/led-core.c:267 led_trigger_event drivers/leds/led-triggers.c:387 [inline] led_trigger_event+0x70/0xd0 drivers/leds/led-triggers.c:377 kbd_led_trigger_activate+0xfa/0x130 drivers/tty/vt/keyboard.c:1017 led_trigger_set+0x61e/0xbd0 drivers/leds/led-triggers.c:195 led_trigger_set_default drivers/leds/led-triggers.c:259 [inline] led_trigger_set_default+0x1a6/0x230 drivers/leds/led-triggers.c:246 led_classdev_register_ext+0x5b1/0x7c0 drivers/leds/led-class.c:417 led_classdev_register include/linux/leds.h:190 [inline] input_leds_connect+0x3fb/0x740 drivers/input/input-leds.c:139 input_attach_handler+0x180/0x1f0 drivers/input/input.c:1035 input_register_device.cold+0xf0/0x307 drivers/input/input.c:2335 atkbd_connect+0x736/0xa00 drivers/input/keyboard/atkbd.c:1293 serio_connect_driver drivers/input/serio/serio.c:47 [inline] serio_driver_probe+0x72/0xa0 drivers/input/serio/serio.c:778 really_probe+0x291/0xde0 drivers/base/dd.c:561 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:745 device_driver_attach+0x228/0x290 drivers/base/dd.c:1020 __driver_attach+0x15b/0x2f0 drivers/base/dd.c:1097 bus_for_each_dev+0x147/0x1d0 drivers/base/bus.c:305 serio_attach_driver drivers/input/serio/serio.c:808 [inline] serio_handle_event+0x5f6/0xa30 drivers/input/serio/serio.c:227 process_one_work+0x98d/0x15f0 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 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_handle_get_val+0x70/0x5e0 drivers/input/evdev.c:900 evdev_do_ioctl+0xf3d/0x1820 drivers/input/evdev.c:1159 evdev_ioctl_handler drivers/input/evdev.c:1272 [inline] evdev_ioctl_compat+0x144/0x1a0 drivers/input/evdev.c:1288 __do_compat_sys_ioctl+0x1d3/0x230 fs/ioctl.c:842 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c -> (&client->buffer_lock){....}-{2:2} { INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402 __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_handle_get_val+0x70/0x5e0 drivers/input/evdev.c:900 evdev_do_ioctl+0xf3d/0x1820 drivers/input/evdev.c:1159 evdev_ioctl_handler drivers/input/evdev.c:1272 [inline] evdev_ioctl_compat+0x144/0x1a0 drivers/input/evdev.c:1288 __do_compat_sys_ioctl+0x1d3/0x230 fs/ioctl.c:842 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c } ... key at: [] __key.4+0x0/0x40 ... acquired at: __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+0x14b/0x460 fs/fcntl.c:1018 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values.part.0+0x64e/0x970 drivers/input/evdev.c:278 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x28b/0x3f0 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115 input_pass_values.part.0+0x284/0x700 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0x373/0x1440 drivers/input/input.c:404 input_inject_event+0x2f5/0x310 drivers/input/input.c:476 evdev_write+0x430/0x760 drivers/input/evdev.c:530 vfs_write+0x28e/0xa30 fs/read_write.c:603 ksys_write+0x1ee/0x250 fs/read_write.c:658 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c -> (&new->fa_lock){....}-{2:2} { INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402 __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+0x14b/0x460 fs/fcntl.c:1018 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values.part.0+0x64e/0x970 drivers/input/evdev.c:278 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x28b/0x3f0 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115 input_pass_values.part.0+0x284/0x700 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0x373/0x1440 drivers/input/input.c:404 input_inject_event+0x2f5/0x310 drivers/input/input.c:476 evdev_write+0x430/0x760 drivers/input/evdev.c:530 vfs_write+0x28e/0xa30 fs/read_write.c:603 ksys_write+0x1ee/0x250 fs/read_write.c:658 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c } ... key at: [] __key.0+0x0/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:231 send_sigio+0x24/0x360 fs/fcntl.c:787 kill_fasync_rcu fs/fcntl.c:1011 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0x205/0x460 fs/fcntl.c:1018 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values.part.0+0x64e/0x970 drivers/input/evdev.c:278 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x28b/0x3f0 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115 input_pass_values.part.0+0x284/0x700 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0x373/0x1440 drivers/input/input.c:404 input_inject_event+0x2f5/0x310 drivers/input/input.c:476 evdev_write+0x430/0x760 drivers/input/evdev.c:530 vfs_write+0x28e/0xa30 fs/read_write.c:603 ksys_write+0x1ee/0x250 fs/read_write.c:658 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock: -> (&f->f_owner.lock){.+.?}-{2:2} { HARDIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223 f_getown+0x1b/0xb0 fs/fcntl.c:152 sock_ioctl+0x4ba/0x6a0 net/socket.c:1122 compat_sock_ioctl_trans net/socket.c:3425 [inline] compat_sock_ioctl+0x3bb/0x1d30 net/socket.c:3498 __do_compat_sys_ioctl+0x1d3/0x230 fs/ioctl.c:842 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c IN-SOFTIRQ-R at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0x45/0x90 kernel/locking/spinlock.c:231 send_sigurg+0x1e/0xac0 fs/fcntl.c:826 sk_send_sigurg+0x76/0x300 net/core/sock.c:2938 tcp_check_urg.isra.0+0x1f4/0x710 net/ipv4/tcp_input.c:5508 tcp_urg net/ipv4/tcp_input.c:5549 [inline] tcp_rcv_established+0x106c/0x1eb0 net/ipv4/tcp_input.c:5883 tcp_v4_do_rcv+0x5d1/0x870 net/ipv4/tcp_ipv4.c:1676 tcp_v4_rcv+0x2d10/0x3750 net/ipv4/tcp_ipv4.c:2058 ip_protocol_deliver_rcu+0x5c/0x8a0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x20a/0x370 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] NF_HOOK include/linux/netfilter.h:295 [inline] ip_local_deliver+0x1b3/0x200 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x1da/0x2f0 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] NF_HOOK include/linux/netfilter.h:295 [inline] ip_rcv+0xaa/0xd0 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5323 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5437 process_backlog+0x232/0x6c0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x461/0xe10 net/core/dev.c:6888 __do_softirq+0x2a5/0x9f7 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu kernel/softirq.c:420 [inline] irq_exit_rcu+0x134/0x200 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 bytes_is_nonzero mm/kasan/generic.c:84 [inline] memory_is_nonzero mm/kasan/generic.c:101 [inline] memory_is_poisoned_n mm/kasan/generic.c:127 [inline] memory_is_poisoned mm/kasan/generic.c:158 [inline] check_memory_region_inline mm/kasan/generic.c:176 [inline] check_memory_region+0xde/0x180 mm/kasan/generic.c:185 instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic64_sub include/asm-generic/atomic-instrumented.h:961 [inline] atomic_long_sub include/asm-generic/atomic-long.h:107 [inline] __vunmap+0x8d5/0xb50 mm/vmalloc.c:2288 __vfree+0x3c/0xd0 mm/vmalloc.c:2333 vfree+0x5a/0x90 mm/vmalloc.c:2364 xt_compat_flush_offsets+0x8b/0x160 net/netfilter/x_tables.c:669 compat_get_entries+0x1fa/0x750 net/ipv4/netfilter/ip_tables.c:1601 do_ipt_get_ctl+0x4d2/0x9d0 net/ipv4/netfilter/ip_tables.c:1657 nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:116 ip_getsockopt net/ipv4/ip_sockglue.c:1777 [inline] ip_getsockopt+0x164/0x1c0 net/ipv4/ip_sockglue.c:1756 tcp_getsockopt+0x86/0xd0 net/ipv4/tcp.c:4141 __sys_getsockopt+0x219/0x4c0 net/socket.c:2156 __do_compat_sys_socketcall+0x513/0x660 net/compat.c:495 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c SOFTIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223 f_getown+0x1b/0xb0 fs/fcntl.c:152 sock_ioctl+0x4ba/0x6a0 net/socket.c:1122 compat_sock_ioctl_trans net/socket.c:3425 [inline] compat_sock_ioctl+0x3bb/0x1d30 net/socket.c:3498 __do_compat_sys_ioctl+0x1d3/0x230 fs/ioctl.c:842 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223 f_getown+0x1b/0xb0 fs/fcntl.c:152 sock_ioctl+0x4ba/0x6a0 net/socket.c:1122 compat_sock_ioctl_trans net/socket.c:3425 [inline] compat_sock_ioctl+0x3bb/0x1d30 net/socket.c:3498 __do_compat_sys_ioctl+0x1d3/0x230 fs/ioctl.c:842 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c } ... key at: [] __key.5+0x0/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:231 send_sigio+0x24/0x360 fs/fcntl.c:787 kill_fasync_rcu fs/fcntl.c:1011 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0x205/0x460 fs/fcntl.c:1018 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values.part.0+0x64e/0x970 drivers/input/evdev.c:278 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x28b/0x3f0 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115 input_pass_values.part.0+0x284/0x700 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0x373/0x1440 drivers/input/input.c:404 input_inject_event+0x2f5/0x310 drivers/input/input.c:476 evdev_write+0x430/0x760 drivers/input/evdev.c:530 vfs_write+0x28e/0xa30 fs/read_write.c:603 ksys_write+0x1ee/0x250 fs/read_write.c:658 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c stack backtrace: CPU: 1 PID: 17505 Comm: syz-executor.1 Not tainted 5.11.0-rc1-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+0x107/0x163 lib/dump_stack.c:120 print_bad_irq_dependency kernel/locking/lockdep.c:2452 [inline] check_irq_usage.cold+0x4f5/0x6c8 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+0x2af6/0x5500 kernel/locking/lockdep.c:4832 lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:231 send_sigio+0x24/0x360 fs/fcntl.c:787 kill_fasync_rcu fs/fcntl.c:1011 [inline] kill_fasync fs/fcntl.c:1025 [inline] kill_fasync+0x205/0x460 fs/fcntl.c:1018 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values.part.0+0x64e/0x970 drivers/input/evdev.c:278 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x28b/0x3f0 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115 input_pass_values.part.0+0x284/0x700 drivers/input/input.c:145 input_pass_values drivers/input/input.c:134 [inline] input_handle_event+0x373/0x1440 drivers/input/input.c:404 input_inject_event+0x2f5/0x310 drivers/input/input.c:476 evdev_write+0x430/0x760 drivers/input/evdev.c:530 vfs_write+0x28e/0xa30 fs/read_write.c:603 ksys_write+0x1ee/0x250 fs/read_write.c:658 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f3a549 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f55340cc EFLAGS: 00000296 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000040 RDX: 00000000000002b8 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000