===================================================== WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected 6.1.125-syzkaller #0 Not tainted ----------------------------------------------------- syz.5.1063/8640 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffff888055922360 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:988 [inline] ffff888055922360 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x196/0x4d0 fs/fcntl.c:1009 and this task is already holding: ffff88802a09d230 (&dev->event_lock#2){-...}-{2:2}, at: input_inject_event+0xc1/0x330 drivers/input/input.c:456 which would create a new lock dependency: (&dev->event_lock#2){-...}-{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:231 [inline] __common_interrupt+0xd7/0x1f0 arch/x86/kernel/irq.c:250 common_interrupt+0xae/0xd0 arch/x86/kernel/irq.c:240 asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:682 arch_test_and_set_bit arch/x86/include/asm/bitops.h:138 [inline] test_and_set_bit include/asm-generic/bitops/instrumented-atomic.h:72 [inline] queue_work_on+0x1f4/0x250 kernel/workqueue.c:1547 queue_work include/linux/workqueue.h:512 [inline] call_usermodehelper_exec+0x272/0x480 kernel/umh.c:437 kobject_uevent_env+0x6a5/0x8c0 lib/kobject_uevent.c:633 driver_register+0x35b/0x3a0 drivers/base/driver.c:254 usb_register_driver+0x206/0x3d0 drivers/usb/core/driver.c:1062 do_one_initcall+0x265/0x8f0 init/main.c:1298 do_initcall_level+0x157/0x207 init/main.c:1371 do_initcalls+0x49/0x86 init/main.c:1387 kernel_init_freeable+0x45c/0x60f init/main.c:1626 kernel_init+0x19/0x290 init/main.c:1514 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+0x8a9/0x11d0 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 --> &new->fa_lock --> tasklist_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(tasklist_lock); local_irq_disable(); lock(&dev->event_lock#2); lock(&new->fa_lock); lock(&dev->event_lock#2); *** DEADLOCK *** 6 locks held by syz.5.1063/8640: #0: ffff88802a09f110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x26d/0x7c0 drivers/input/evdev.c:513 #1: ffff88802a09d230 (&dev->event_lock#2){-...}-{2:2}, at: input_inject_event+0xc1/0x330 drivers/input/input.c:456 #2: ffffffff8d32b0c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #2: ffffffff8d32b0c0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #2: ffffffff8d32b0c0 (rcu_read_lock){....}-{1:2}, at: input_inject_event+0xd1/0x330 drivers/input/input.c:458 #3: ffffffff8d32b0c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #3: ffffffff8d32b0c0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #3: ffffffff8d32b0c0 (rcu_read_lock){....}-{1:2}, at: input_pass_values+0xa3/0x12a0 drivers/input/input.c:151 #4: ffffffff8d32b0c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #4: ffffffff8d32b0c0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #4: ffffffff8d32b0c0 (rcu_read_lock){....}-{1:2}, at: mousedev_notify_readers+0x2a/0xc80 drivers/input/mousedev.c:269 #5: ffffffff8d32b0c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #5: ffffffff8d32b0c0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #5: ffffffff8d32b0c0 (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:231 [inline] __common_interrupt+0xd7/0x1f0 arch/x86/kernel/irq.c:250 common_interrupt+0xae/0xd0 arch/x86/kernel/irq.c:240 asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:682 arch_test_and_set_bit arch/x86/include/asm/bitops.h:138 [inline] test_and_set_bit include/asm-generic/bitops/instrumented-atomic.h:72 [inline] queue_work_on+0x1f4/0x250 kernel/workqueue.c:1547 queue_work include/linux/workqueue.h:512 [inline] call_usermodehelper_exec+0x272/0x480 kernel/umh.c:437 kobject_uevent_env+0x6a5/0x8c0 lib/kobject_uevent.c:633 driver_register+0x35b/0x3a0 drivers/base/driver.c:254 usb_register_driver+0x206/0x3d0 drivers/usb/core/driver.c:1062 do_one_initcall+0x265/0x8f0 init/main.c:1298 do_initcall_level+0x157/0x207 init/main.c:1371 do_initcalls+0x49/0x86 init/main.c:1387 kernel_init_freeable+0x45c/0x60f init/main.c:1626 kernel_init+0x19/0x290 init/main.c:1514 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+0x600/0x7e0 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+0xcec/0x1080 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 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+0x8a9/0x11d0 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 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+0x8a9/0x11d0 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+0x8a9/0x11d0 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+0x24b6/0x4060 kernel/fork.c:2400 kernel_clone+0x222/0x920 kernel/fork.c:2681 user_mode_thread+0x12e/0x190 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+0x8a9/0x11d0 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+0x5a5/0x8f0 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/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> (&f->f_owner.lock){....}-{2:2} { 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/0xb0 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 tcp_check_urg+0x202/0x740 net/ipv4/tcp_input.c:5700 tcp_urg+0x154/0x440 net/ipv4/tcp_input.c:5741 tcp_rcv_established+0xe58/0x1f00 net/ipv4/tcp_input.c:6094 tcp_v4_do_rcv+0x487/0xb00 net/ipv4/tcp_ipv4.c:1683 sk_backlog_rcv include/net/sock.h:1119 [inline] __release_sock+0x198/0x4b0 net/core/sock.c:2939 release_sock+0x5d/0x1c0 net/core/sock.c:3503 tcp_sendmsg+0x36/0x40 net/ipv4/tcp.c:1491 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] ____sys_sendmsg+0x5a5/0x8f0 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/0xb0 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 sk_wake_async+0x186/0x280 include/net/sock.h:2592 unix_write_space+0x248/0x370 net/unix/af_unix.c:531 sock_wfree+0x1b3/0x610 net/core/sock.c:2447 unix_destruct_scm+0x2e3/0x350 net/unix/scm.c:152 skb_release_head_state+0xf9/0x230 net/core/skbuff.c:843 skb_release_all net/core/skbuff.c:854 [inline] __kfree_skb net/core/skbuff.c:870 [inline] kfree_skb_reason+0x13d/0x390 net/core/skbuff.c:893 kfree_skb include/linux/skbuff.h:1220 [inline] unix_dgram_sendmsg+0xa24/0x2050 net/unix/af_unix.c:2068 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] ____sys_sendmsg+0x5a5/0x8f0 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/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> (&new->fa_lock){....}-{2:2} { 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 lease_modify+0x19c/0x380 fs/locks.c:1386 locks_remove_lease fs/locks.c:2622 [inline] locks_remove_file+0x5d3/0x1040 fs/locks.c:2647 __fput+0x363/0x8d0 fs/file_table.c:312 task_work_run+0x246/0x300 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177 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+0x47/0xb0 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 sk_wake_async+0x186/0x280 include/net/sock.h:2592 unix_write_space+0x248/0x370 net/unix/af_unix.c:531 sock_wfree+0x1b3/0x610 net/core/sock.c:2447 unix_destruct_scm+0x2e3/0x350 net/unix/scm.c:152 skb_release_head_state+0xf9/0x230 net/core/skbuff.c:843 skb_release_all net/core/skbuff.c:854 [inline] __kfree_skb net/core/skbuff.c:870 [inline] kfree_skb_reason+0x13d/0x390 net/core/skbuff.c:893 kfree_skb include/linux/skbuff.h:1220 [inline] unix_dgram_sendmsg+0xa24/0x2050 net/unix/af_unix.c:2068 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] ____sys_sendmsg+0x5a5/0x8f0 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/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 } ... 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 mousedev_notify_readers+0x719/0xc80 drivers/input/mousedev.c:309 mousedev_event+0x554/0x1260 drivers/input/mousedev.c:394 input_to_handler drivers/input/input.c:130 [inline] input_pass_values+0x9ee/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+0x668/0x7c0 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/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 stack backtrace: CPU: 0 PID: 8640 Comm: syz.5.1063 Not tainted 6.1.125-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 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 mousedev_notify_readers+0x719/0xc80 drivers/input/mousedev.c:309 mousedev_event+0x554/0x1260 drivers/input/mousedev.c:394 input_to_handler drivers/input/input.c:130 [inline] input_pass_values+0x9ee/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+0x668/0x7c0 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/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f54f5185d29 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:00007f54f603d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f54f5375fa0 RCX: 00007f54f5185d29 RDX: 0000000000000078 RSI: 00000000200003c0 RDI: 0000000000000004 RBP: 00007f54f5201b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f54f5375fa0 R15: 00007ffc28c058c8