===================================================== WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected 6.1.134-syzkaller #0 Not tainted ----------------------------------------------------- syz.7.1802/11430 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffff888073e8a0c0 (&new->fa_lock){...-}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:988 [inline] ffff888073e8a0c0 (&new->fa_lock){...-}-{2:2}, at: kill_fasync+0x196/0x4d0 fs/fcntl.c:1009 and this task is already holding: ffff8880271d6028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] ffff8880271d6028 (&client->buffer_lock){....}-{2:2}, at: evdev_pass_values+0xee/0xad0 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){-.-.}-{2:2} ... which became HARDIRQ-irq-safe at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162 input_event+0x8d/0xd0 drivers/input/input.c:430 input_report_key include/linux/input.h:425 [inline] psmouse_report_standard_buttons drivers/input/mouse/psmouse-base.c:121 [inline] psmouse_report_standard_packet+0x50/0x200 drivers/input/mouse/psmouse-base.c:139 psmouse_process_byte+0x45b/0x640 drivers/input/mouse/psmouse-base.c:230 psmouse_handle_byte+0x46/0x4b0 drivers/input/mouse/psmouse-base.c:272 psmouse_interrupt+0x697/0x10a0 drivers/input/mouse/psmouse-base.c:424 serio_interrupt+0x88/0x130 drivers/input/serio/serio.c:998 i8042_interrupt+0x357/0x750 drivers/input/serio/i8042.c:610 __handle_irq_event_percpu+0x2a8/0xb20 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x85/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x245/0xbf0 kernel/irq/chip.c:819 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline] handle_irq arch/x86/kernel/irq.c:233 [inline] __common_interrupt+0xd7/0x1f0 arch/x86/kernel/irq.c:252 common_interrupt+0xae/0xd0 arch/x86/kernel/irq.c:242 asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:682 PageHuge+0x0/0x1f0 SetPageAnonExclusive include/linux/page-flags.h:1034 [inline] __page_set_anon_rmap+0x35b/0x8b0 mm/rmap.c:1152 do_anonymous_page mm/memory.c:4230 [inline] handle_pte_fault mm/memory.c:5029 [inline] __handle_mm_fault mm/memory.c:5173 [inline] handle_mm_fault+0x46e3/0x5340 mm/memory.c:5294 faultin_page mm/gup.c:1026 [inline] __get_user_pages+0x4f3/0x1190 mm/gup.c:1250 __get_user_pages_locked mm/gup.c:1454 [inline] __get_user_pages_remote+0x1cd/0x750 mm/gup.c:2201 get_arg_page+0x1dc/0x440 fs/exec.c:223 copy_string_kernel+0x174/0x240 fs/exec.c:641 kernel_execve+0x58e/0xa10 fs/exec.c:2026 call_usermodehelper_exec_async+0x22f/0x370 kernel/umh.c:113 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 to a HARDIRQ-irq-unsafe lock: (tasklist_lock){.+.+}-{2:2} ... which became HARDIRQ-irq-unsafe at: ... lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x2c6/0xb80 kernel/exit.c:1604 kernel_wait+0xe5/0x230 kernel/exit.c:1794 call_usermodehelper_exec_sync kernel/umh.c:140 [inline] call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:167 process_one_work+0x917/0x1260 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 other info that might help us debug this: Chain exists of: &dev->event_lock#2 --> &client->buffer_lock --> tasklist_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(tasklist_lock); local_irq_disable(); lock(&dev->event_lock#2); lock(&client->buffer_lock); lock(&dev->event_lock#2); *** DEADLOCK *** 7 locks held by syz.7.1802/11430: #0: ffff88802972c110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x182/0x580 drivers/input/evdev.c:513 #1: ffff8881423c8230 (&dev->event_lock#2){-.-.}-{2:2}, at: input_inject_event+0xc1/0x330 drivers/input/input.c:456 #2: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #2: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #2: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: input_inject_event+0xd1/0x330 drivers/input/input.c:458 #3: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #3: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #3: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: input_pass_values+0xa3/0x12a0 drivers/input/input.c:151 #4: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #4: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #4: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: evdev_events+0x6b/0x2f0 drivers/input/evdev.c:298 #5: ffff8880271d6028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #5: ffff8880271d6028 (&client->buffer_lock){....}-{2:2}, at: evdev_pass_values+0xee/0xad0 drivers/input/evdev.c:261 #6: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #6: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #6: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x51/0x4d0 fs/fcntl.c:1008 the dependencies between HARDIRQ-irq-safe lock and the holding lock: -> (&dev->event_lock#2){-.-.}-{2:2} { IN-HARDIRQ-W at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162 input_event+0x8d/0xd0 drivers/input/input.c:430 input_report_key include/linux/input.h:425 [inline] psmouse_report_standard_buttons drivers/input/mouse/psmouse-base.c:121 [inline] psmouse_report_standard_packet+0x50/0x200 drivers/input/mouse/psmouse-base.c:139 psmouse_process_byte+0x45b/0x640 drivers/input/mouse/psmouse-base.c:230 psmouse_handle_byte+0x46/0x4b0 drivers/input/mouse/psmouse-base.c:272 psmouse_interrupt+0x697/0x10a0 drivers/input/mouse/psmouse-base.c:424 serio_interrupt+0x88/0x130 drivers/input/serio/serio.c:998 i8042_interrupt+0x357/0x750 drivers/input/serio/i8042.c:610 __handle_irq_event_percpu+0x2a8/0xb20 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x85/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x245/0xbf0 kernel/irq/chip.c:819 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline] handle_irq arch/x86/kernel/irq.c:233 [inline] __common_interrupt+0xd7/0x1f0 arch/x86/kernel/irq.c:252 common_interrupt+0xae/0xd0 arch/x86/kernel/irq.c:242 asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:682 PageHuge+0x0/0x1f0 SetPageAnonExclusive include/linux/page-flags.h:1034 [inline] __page_set_anon_rmap+0x35b/0x8b0 mm/rmap.c:1152 do_anonymous_page mm/memory.c:4230 [inline] handle_pte_fault mm/memory.c:5029 [inline] __handle_mm_fault mm/memory.c:5173 [inline] handle_mm_fault+0x46e3/0x5340 mm/memory.c:5294 faultin_page mm/gup.c:1026 [inline] __get_user_pages+0x4f3/0x1190 mm/gup.c:1250 __get_user_pages_locked mm/gup.c:1454 [inline] __get_user_pages_remote+0x1cd/0x750 mm/gup.c:2201 get_arg_page+0x1dc/0x440 fs/exec.c:223 copy_string_kernel+0x174/0x240 fs/exec.c:641 kernel_execve+0x58e/0xa10 fs/exec.c:2026 call_usermodehelper_exec_async+0x22f/0x370 kernel/umh.c:113 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 IN-SOFTIRQ-W at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162 input_event+0x8d/0xd0 drivers/input/input.c:430 input_sync include/linux/input.h:450 [inline] hidinput_report_event+0x8f/0xf0 drivers/hid/hid-input.c:1727 hid_report_raw_event+0x15d5/0x17e0 drivers/hid/hid-core.c:2027 hid_input_report+0x420/0x4e0 drivers/hid/hid-core.c:2088 hid_irq_in+0x45c/0x690 drivers/hid/usbhid/hid-core.c:284 __usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1675 dummy_timer+0x8dc/0x32b0 drivers/usb/gadget/udc/dummy_hcd.c:1994 __run_hrtimer kernel/time/hrtimer.c:1691 [inline] __hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1755 hrtimer_run_softirq+0x196/0x2c0 kernel/time/hrtimer.c:1772 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0x157/0x240 kernel/softirq.c:661 irq_exit_rcu+0x5/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202 process_one_work+0x7d6/0x1260 kernel/workqueue.c:2265 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 INITIAL USE at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162 input_inject_event+0xc1/0x330 drivers/input/input.c:456 led_trigger_event+0x130/0x210 drivers/leds/led-triggers.c:392 kbd_led_trigger_activate+0xb9/0x100 drivers/tty/vt/keyboard.c:1036 led_trigger_set+0x55a/0x970 drivers/leds/led-triggers.c:211 led_trigger_set_default+0x1c2/0x200 drivers/leds/led-triggers.c:275 led_classdev_register_ext+0x5ee/0x800 drivers/leds/led-class.c:426 led_classdev_register include/linux/leds.h:196 [inline] input_leds_connect+0x48f/0x630 drivers/input/input-leds.c:139 input_attach_handler drivers/input/input.c:1060 [inline] input_register_device+0xd65/0x1250 drivers/input/input.c:2470 atkbd_connect+0x79d/0x9e0 drivers/input/keyboard/atkbd.c:1321 serio_connect_driver drivers/input/serio/serio.c:44 [inline] serio_driver_probe+0x74/0x90 drivers/input/serio/serio.c:775 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x2ab/0xcb0 drivers/base/dd.c:639 __driver_probe_device+0x1a2/0x3d0 drivers/base/dd.c:785 driver_probe_device+0x50/0x420 drivers/base/dd.c:815 __driver_attach+0x458/0x6f0 drivers/base/dd.c:1201 bus_for_each_dev+0x17c/0x1f0 drivers/base/bus.c:303 serio_attach_driver drivers/input/serio/serio.c:804 [inline] serio_handle_event+0x56a/0x8f0 drivers/input/serio/serio.c:224 process_one_work+0x917/0x1260 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 } ... key at: [] input_allocate_device.__key.5+0x0/0x20 -> (&client->buffer_lock){....}-{2:2} { INITIAL USE at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] evdev_pass_values+0xee/0xad0 drivers/input/evdev.c:261 evdev_events+0x1be/0x2f0 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:127 [inline] input_pass_values+0x8e0/0x12a0 drivers/input/input.c:159 input_event_dispose+0x366/0x650 drivers/input/input.c:374 input_handle_event+0x97d/0xb00 drivers/input/input.c:402 input_inject_event+0x224/0x330 drivers/input/input.c:461 evdev_write+0x389/0x580 drivers/input/evdev.c:530 vfs_write+0x2d9/0xbc0 fs/read_write.c:582 ksys_write+0x19c/0x2c0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 } ... key at: [] evdev_open.__key.28+0x0/0x20 ... acquired at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] evdev_pass_values+0xee/0xad0 drivers/input/evdev.c:261 evdev_events+0x1be/0x2f0 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:127 [inline] input_pass_values+0x8e0/0x12a0 drivers/input/input.c:159 input_event_dispose+0x366/0x650 drivers/input/input.c:374 input_handle_event+0x97d/0xb00 drivers/input/input.c:402 input_inject_event+0x224/0x330 drivers/input/input.c:461 evdev_write+0x389/0x580 drivers/input/evdev.c:530 vfs_write+0x2d9/0xbc0 fs/read_write.c:582 ksys_write+0x19c/0x2c0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock: -> (tasklist_lock){.+.+}-{2:2} { HARDIRQ-ON-R at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x2c6/0xb80 kernel/exit.c:1604 kernel_wait+0xe5/0x230 kernel/exit.c:1794 call_usermodehelper_exec_sync kernel/umh.c:140 [inline] call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:167 process_one_work+0x917/0x1260 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 SOFTIRQ-ON-R at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x2c6/0xb80 kernel/exit.c:1604 kernel_wait+0xe5/0x230 kernel/exit.c:1794 call_usermodehelper_exec_sync kernel/umh.c:140 [inline] call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:167 process_one_work+0x917/0x1260 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 INITIAL USE at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:326 copy_process+0x24f6/0x40a0 kernel/fork.c:2400 kernel_clone+0x222/0x920 kernel/fork.c:2681 user_mode_thread+0x140/0x1b0 kernel/fork.c:2757 rest_init+0x23/0x300 init/main.c:698 start_kernel+0x0/0x53f init/main.c:893 start_kernel+0x496/0x53f init/main.c:1140 secondary_startup_64_no_verify+0xcf/0xdb INITIAL READ USE at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x2c6/0xb80 kernel/exit.c:1604 kernel_wait+0xe5/0x230 kernel/exit.c:1794 call_usermodehelper_exec_sync kernel/umh.c:140 [inline] call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:167 process_one_work+0x917/0x1260 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 } ... key at: [] tasklist_lock+0x18/0x40 ... acquired at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 send_sigurg+0xea/0x3b0 fs/fcntl.c:825 sk_send_sigurg+0x6a/0xb0 net/core/sock.c:3366 queue_oob+0x81a/0xaf0 net/unix/af_unix.c:2128 unix_stream_sendmsg+0xe10/0x1070 net/unix/af_unix.c:2228 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] ____sys_sendmsg+0x5d3/0x9a0 net/socket.c:2519 ___sys_sendmsg net/socket.c:2573 [inline] __sys_sendmmsg+0x3ab/0x730 net/socket.c:2659 __do_sys_sendmmsg net/socket.c:2688 [inline] __se_sys_sendmmsg net/socket.c:2685 [inline] __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2685 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> (&f->f_owner.lock){...-}-{2:2} { IN-SOFTIRQ-R at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 send_sigio+0x2f/0x360 fs/fcntl.c:770 kill_fasync_rcu fs/fcntl.c:995 [inline] kill_fasync+0x232/0x4d0 fs/fcntl.c:1009 sock_wake_async+0x145/0x170 net/socket.c:-1 sk_wake_async+0x186/0x280 include/net/sock.h:2592 sock_def_readable+0x1a7/0x280 net/core/sock.c:3310 mptcp_data_ready+0x41e/0x790 net/mptcp/protocol.c:881 subflow_data_ready+0x254/0x390 net/mptcp/subflow.c:1374 tcp_data_queue+0x25e9/0x7720 net/ipv4/tcp_input.c:5165 tcp_rcv_established+0xe6c/0x1e90 net/ipv4/tcp_input.c:6097 tcp_v4_do_rcv+0x487/0xb10 net/ipv4/tcp_ipv4.c:1683 tcp_v4_rcv+0x23c9/0x2c60 net/ipv4/tcp_ipv4.c:2114 ip_protocol_deliver_rcu+0x386/0x750 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x304/0x580 net/ipv4/ip_input.c:233 NF_HOOK+0x39d/0x450 include/linux/netfilter.h:302 NF_HOOK+0x39d/0x450 include/linux/netfilter.h:302 __netif_receive_skb_one_core net/core/dev.c:5569 [inline] __netif_receive_skb+0x1c6/0x530 net/core/dev.c:5683 process_backlog+0x381/0x760 net/core/dev.c:6011 __napi_poll+0xc7/0x470 net/core/dev.c:6578 napi_poll net/core/dev.c:6645 [inline] net_rx_action+0x70f/0xeb0 net/core/dev.c:6759 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0x157/0x240 kernel/softirq.c:661 irq_exit_rcu+0x5/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 lock_acquire+0x26f/0x5a0 kernel/locking/lockdep.c:5666 lock_sock_nested+0x44/0x100 net/core/sock.c:3488 lock_sock include/net/sock.h:1756 [inline] mptcp_worker+0x83/0x1640 net/mptcp/protocol.c:2758 process_one_work+0x917/0x1260 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 INITIAL USE at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:326 __f_setown+0x38/0x350 fs/fcntl.c:91 generic_add_lease fs/locks.c:1806 [inline] generic_setlease+0xf3f/0x1440 fs/locks.c:1886 vfs_setlease fs/locks.c:1976 [inline] do_fcntl_add_lease fs/locks.c:1997 [inline] fcntl_setlease+0x341/0x3f0 fs/locks.c:2019 do_fcntl+0x10a/0x1500 fs/fcntl.c:395 __do_sys_fcntl fs/fcntl.c:446 [inline] __se_sys_fcntl+0xd5/0x1b0 fs/fcntl.c:431 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 INITIAL READ USE at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 send_sigurg+0x25/0x3b0 fs/fcntl.c:809 sk_send_sigurg+0x6a/0xb0 net/core/sock.c:3366 queue_oob+0x81a/0xaf0 net/unix/af_unix.c:2128 unix_stream_sendmsg+0xe10/0x1070 net/unix/af_unix.c:2228 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] ____sys_sendmsg+0x5d3/0x9a0 net/socket.c:2519 ___sys_sendmsg net/socket.c:2573 [inline] __sys_sendmsg+0x2a9/0x390 net/socket.c:2602 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 } ... key at: [] __alloc_file.__key+0x0/0x10 ... acquired at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 send_sigio+0x2f/0x360 fs/fcntl.c:770 kill_fasync_rcu fs/fcntl.c:995 [inline] kill_fasync+0x232/0x4d0 fs/fcntl.c:1009 sock_wake_async+0x145/0x170 net/socket.c:-1 sk_wake_async+0x186/0x280 include/net/sock.h:2592 sock_def_readable+0x1a7/0x280 net/core/sock.c:3310 mptcp_data_ready+0x41e/0x790 net/mptcp/protocol.c:881 subflow_data_ready+0x254/0x390 net/mptcp/subflow.c:1374 tcp_data_queue+0x25e9/0x7720 net/ipv4/tcp_input.c:5165 tcp_rcv_established+0xe6c/0x1e90 net/ipv4/tcp_input.c:6097 tcp_v4_do_rcv+0x487/0xb10 net/ipv4/tcp_ipv4.c:1683 tcp_v4_rcv+0x23c9/0x2c60 net/ipv4/tcp_ipv4.c:2114 ip_protocol_deliver_rcu+0x386/0x750 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x304/0x580 net/ipv4/ip_input.c:233 NF_HOOK+0x39d/0x450 include/linux/netfilter.h:302 NF_HOOK+0x39d/0x450 include/linux/netfilter.h:302 __netif_receive_skb_one_core net/core/dev.c:5569 [inline] __netif_receive_skb+0x1c6/0x530 net/core/dev.c:5683 process_backlog+0x381/0x760 net/core/dev.c:6011 __napi_poll+0xc7/0x470 net/core/dev.c:6578 napi_poll net/core/dev.c:6645 [inline] net_rx_action+0x70f/0xeb0 net/core/dev.c:6759 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0x157/0x240 kernel/softirq.c:661 irq_exit_rcu+0x5/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 lock_acquire+0x26f/0x5a0 kernel/locking/lockdep.c:5666 lock_sock_nested+0x44/0x100 net/core/sock.c:3488 lock_sock include/net/sock.h:1756 [inline] mptcp_worker+0x83/0x1640 net/mptcp/protocol.c:2758 process_one_work+0x917/0x1260 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 -> (&new->fa_lock){...-}-{2:2} { IN-SOFTIRQ-R at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:988 [inline] kill_fasync+0x196/0x4d0 fs/fcntl.c:1009 sock_wake_async+0x145/0x170 net/socket.c:-1 sk_wake_async+0x186/0x280 include/net/sock.h:2592 sock_def_readable+0x1a7/0x280 net/core/sock.c:3310 mptcp_data_ready+0x41e/0x790 net/mptcp/protocol.c:881 subflow_data_ready+0x254/0x390 net/mptcp/subflow.c:1374 tcp_data_queue+0x25e9/0x7720 net/ipv4/tcp_input.c:5165 tcp_rcv_established+0xe6c/0x1e90 net/ipv4/tcp_input.c:6097 tcp_v4_do_rcv+0x487/0xb10 net/ipv4/tcp_ipv4.c:1683 tcp_v4_rcv+0x23c9/0x2c60 net/ipv4/tcp_ipv4.c:2114 ip_protocol_deliver_rcu+0x386/0x750 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x304/0x580 net/ipv4/ip_input.c:233 NF_HOOK+0x39d/0x450 include/linux/netfilter.h:302 NF_HOOK+0x39d/0x450 include/linux/netfilter.h:302 __netif_receive_skb_one_core net/core/dev.c:5569 [inline] __netif_receive_skb+0x1c6/0x530 net/core/dev.c:5683 process_backlog+0x381/0x760 net/core/dev.c:6011 __napi_poll+0xc7/0x470 net/core/dev.c:6578 napi_poll net/core/dev.c:6645 [inline] net_rx_action+0x70f/0xeb0 net/core/dev.c:6759 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0x157/0x240 kernel/softirq.c:661 irq_exit_rcu+0x5/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 lock_acquire+0x26f/0x5a0 kernel/locking/lockdep.c:5666 lock_sock_nested+0x44/0x100 net/core/sock.c:3488 lock_sock include/net/sock.h:1756 [inline] mptcp_worker+0x83/0x1640 net/mptcp/protocol.c:2758 process_one_work+0x917/0x1260 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 INITIAL USE at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:326 fasync_remove_entry+0xfb/0x1d0 fs/fcntl.c:865 sock_fasync+0x86/0xf0 net/socket.c:1425 __fput+0x75e/0x8d0 fs/file_table.c:317 task_work_run+0x246/0x300 kernel/task_work.c:203 get_signal+0x15d0/0x17a0 kernel/signal.c:2648 arch_do_signal_or_restart+0xb3/0x12a0 arch/x86/kernel/signal.c:871 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303 do_syscall_64+0x47/0x80 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 INITIAL READ USE at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:988 [inline] kill_fasync+0x196/0x4d0 fs/fcntl.c:1009 sock_wake_async+0x145/0x170 net/socket.c:-1 sk_wake_async+0x186/0x280 include/net/sock.h:2592 sock_def_readable+0x1a7/0x280 net/core/sock.c:3310 mptcp_data_ready+0x41e/0x790 net/mptcp/protocol.c:881 subflow_data_ready+0x254/0x390 net/mptcp/subflow.c:1374 tcp_data_queue+0x25e9/0x7720 net/ipv4/tcp_input.c:5165 tcp_rcv_established+0xe6c/0x1e90 net/ipv4/tcp_input.c:6097 tcp_v4_do_rcv+0x487/0xb10 net/ipv4/tcp_ipv4.c:1683 tcp_v4_rcv+0x23c9/0x2c60 net/ipv4/tcp_ipv4.c:2114 ip_protocol_deliver_rcu+0x386/0x750 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x304/0x580 net/ipv4/ip_input.c:233 NF_HOOK+0x39d/0x450 include/linux/netfilter.h:302 NF_HOOK+0x39d/0x450 include/linux/netfilter.h:302 __netif_receive_skb_one_core net/core/dev.c:5569 [inline] __netif_receive_skb+0x1c6/0x530 net/core/dev.c:5683 process_backlog+0x381/0x760 net/core/dev.c:6011 __napi_poll+0xc7/0x470 net/core/dev.c:6578 napi_poll net/core/dev.c:6645 [inline] net_rx_action+0x70f/0xeb0 net/core/dev.c:6759 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0x157/0x240 kernel/softirq.c:661 irq_exit_rcu+0x5/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 lock_acquire+0x26f/0x5a0 kernel/locking/lockdep.c:5666 lock_sock_nested+0x44/0x100 net/core/sock.c:3488 lock_sock include/net/sock.h:1756 [inline] mptcp_worker+0x83/0x1640 net/mptcp/protocol.c:2758 process_one_work+0x917/0x1260 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 } ... key at: [] fasync_insert_entry.__key+0x0/0x20 ... acquired at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:988 [inline] kill_fasync+0x196/0x4d0 fs/fcntl.c:1009 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x586/0xad0 drivers/input/evdev.c:278 evdev_events+0x1be/0x2f0 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:127 [inline] input_pass_values+0x8e0/0x12a0 drivers/input/input.c:159 input_event_dispose+0x366/0x650 drivers/input/input.c:374 input_handle_event+0x97d/0xb00 drivers/input/input.c:402 input_inject_event+0x224/0x330 drivers/input/input.c:461 evdev_write+0x389/0x580 drivers/input/evdev.c:530 vfs_write+0x2d9/0xbc0 fs/read_write.c:582 ksys_write+0x19c/0x2c0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 stack backtrace: CPU: 1 PID: 11430 Comm: syz.7.1802 Not tainted 6.1.134-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_bad_irq_dependency kernel/locking/lockdep.c:2604 [inline] check_irq_usage kernel/locking/lockdep.c:2843 [inline] check_prev_add kernel/locking/lockdep.c:3094 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain+0x4d16/0x5950 kernel/locking/lockdep.c:3825 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:988 [inline] kill_fasync+0x196/0x4d0 fs/fcntl.c:1009 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x586/0xad0 drivers/input/evdev.c:278 evdev_events+0x1be/0x2f0 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:127 [inline] input_pass_values+0x8e0/0x12a0 drivers/input/input.c:159 input_event_dispose+0x366/0x650 drivers/input/input.c:374 input_handle_event+0x97d/0xb00 drivers/input/input.c:402 input_inject_event+0x224/0x330 drivers/input/input.c:461 evdev_write+0x389/0x580 drivers/input/evdev.c:530 vfs_write+0x2d9/0xbc0 fs/read_write.c:582 ksys_write+0x19c/0x2c0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f4aae78e969 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4aaf68f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f4aae9b5fa0 RCX: 00007f4aae78e969 RDX: 0000000000001068 RSI: 0000200000000040 RDI: 0000000000000004 RBP: 00007f4aae810ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f4aae9b5fa0 R15: 00007ffc3e6717c8