===================================================== WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected 5.15.175-syzkaller #0 Not tainted ----------------------------------------------------- syz.2.405/5611 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffffffff8c80a058 (tasklist_lock){.+.+}-{2:2}, at: send_sigurg+0xc8/0x380 fs/fcntl.c:845 and this task is already holding: ffff888029f8cdb8 (&f->f_owner.lock){....}-{2:2}, at: send_sigurg+0x25/0x380 fs/fcntl.c:829 which would create a new lock dependency: (&f->f_owner.lock){....}-{2:2} -> (tasklist_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+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __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+0x8a/0xd0 drivers/input/input.c:456 input_report_key include/linux/input.h:425 [inline] psmouse_report_standard_buttons drivers/input/mouse/psmouse-base.c:123 [inline] psmouse_report_standard_packet+0x50/0x200 drivers/input/mouse/psmouse-base.c:141 psmouse_process_byte+0x45b/0x640 drivers/input/mouse/psmouse-base.c:232 psmouse_handle_byte+0x46/0x4b0 drivers/input/mouse/psmouse-base.c:274 psmouse_interrupt+0x697/0x10a0 drivers/input/mouse/psmouse-base.c:426 serio_interrupt+0x88/0x130 drivers/input/serio/serio.c:1001 i8042_interrupt+0x355/0x750 drivers/input/serio/i8042.c:606 __handle_irq_event_percpu+0x292/0xa70 kernel/irq/handle.c:156 handle_irq_event_percpu kernel/irq/handle.c:196 [inline] handle_irq_event+0xff/0x2b0 kernel/irq/handle.c:213 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:667 lock_acquire+0x252/0x4f0 kernel/locking/lockdep.c:5627 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:363 [inline] usb_match_dynamic_id drivers/usb/core/driver.c:236 [inline] usb_device_match+0x474/0x560 drivers/usb/core/driver.c:893 driver_match_device drivers/base/base.h:147 [inline] __driver_attach+0x66/0x690 drivers/base/dd.c:1120 bus_for_each_dev+0x17c/0x1f0 drivers/base/bus.c:303 bus_add_driver+0x334/0x600 drivers/base/bus.c:620 driver_register+0x2bf/0x3a0 drivers/base/driver.c:240 usb_register_driver+0x206/0x3d0 drivers/usb/core/driver.c:1061 do_one_initcall+0x22b/0x7a0 init/main.c:1302 do_initcall_level+0x157/0x210 init/main.c:1375 do_initcalls+0x49/0x90 init/main.c:1391 kernel_init_freeable+0x425/0x5c0 init/main.c:1615 kernel_init+0x19/0x290 init/main.c:1506 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 to a HARDIRQ-irq-unsafe lock: (tasklist_lock){.+.+}-{2:2} ... which became HARDIRQ-irq-unsafe at: ... lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x2a7/0xaf0 kernel/exit.c:1578 kernel_wait+0xe5/0x230 kernel/exit.c:1768 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 other info that might help us debug this: Chain exists of: &dev->event_lock#2 --> &f->f_owner.lock --> tasklist_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(tasklist_lock); local_irq_disable(); lock(&dev->event_lock#2); lock(&f->f_owner.lock); lock(&dev->event_lock#2); *** DEADLOCK *** 2 locks held by syz.2.405/5611: #0: ffff88801fd53120 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1678 [inline] #0: ffff88801fd53120 (sk_lock-AF_INET){+.+.}-{0:0}, at: tcp_sendmsg+0x1e/0x40 net/ipv4/tcp.c:1456 #1: ffff888029f8cdb8 (&f->f_owner.lock){....}-{2:2}, at: send_sigurg+0x25/0x380 fs/fcntl.c:829 the dependencies between HARDIRQ-irq-safe lock and the holding lock: -> (&dev->event_lock#2){-...}-{2:2} { IN-HARDIRQ-W at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __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+0x8a/0xd0 drivers/input/input.c:456 input_report_key include/linux/input.h:425 [inline] psmouse_report_standard_buttons drivers/input/mouse/psmouse-base.c:123 [inline] psmouse_report_standard_packet+0x50/0x200 drivers/input/mouse/psmouse-base.c:141 psmouse_process_byte+0x45b/0x640 drivers/input/mouse/psmouse-base.c:232 psmouse_handle_byte+0x46/0x4b0 drivers/input/mouse/psmouse-base.c:274 psmouse_interrupt+0x697/0x10a0 drivers/input/mouse/psmouse-base.c:426 serio_interrupt+0x88/0x130 drivers/input/serio/serio.c:1001 i8042_interrupt+0x355/0x750 drivers/input/serio/i8042.c:606 __handle_irq_event_percpu+0x292/0xa70 kernel/irq/handle.c:156 handle_irq_event_percpu kernel/irq/handle.c:196 [inline] handle_irq_event+0xff/0x2b0 kernel/irq/handle.c:213 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:667 lock_acquire+0x252/0x4f0 kernel/locking/lockdep.c:5627 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:363 [inline] usb_match_dynamic_id drivers/usb/core/driver.c:236 [inline] usb_device_match+0x474/0x560 drivers/usb/core/driver.c:893 driver_match_device drivers/base/base.h:147 [inline] __driver_attach+0x66/0x690 drivers/base/dd.c:1120 bus_for_each_dev+0x17c/0x1f0 drivers/base/bus.c:303 bus_add_driver+0x334/0x600 drivers/base/bus.c:620 driver_register+0x2bf/0x3a0 drivers/base/driver.c:240 usb_register_driver+0x206/0x3d0 drivers/usb/core/driver.c:1061 do_one_initcall+0x22b/0x7a0 init/main.c:1302 do_initcall_level+0x157/0x210 init/main.c:1375 do_initcalls+0x49/0x90 init/main.c:1391 kernel_init_freeable+0x425/0x5c0 init/main.c:1615 kernel_init+0x19/0x290 init/main.c:1506 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 INITIAL USE at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __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+0xc0/0x300 drivers/input/input.c:482 led_trigger_event+0x109/0x1e0 drivers/leds/led-triggers.c:392 kbd_led_trigger_activate+0xb9/0x100 drivers/tty/vt/keyboard.c:1029 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+0x6cf/0x8d0 drivers/leds/led-class.c:428 led_classdev_register include/linux/leds.h:196 [inline] input_leds_connect+0x503/0x740 drivers/input/input-leds.c:139 input_attach_handler drivers/input/input.c:1046 [inline] input_register_device+0xdae/0x1150 drivers/input/input.c:2429 atkbd_connect+0x7a7/0xa70 drivers/input/keyboard/atkbd.c:1336 serio_connect_driver drivers/input/serio/serio.c:47 [inline] serio_driver_probe+0x74/0x90 drivers/input/serio/serio.c:778 really_probe+0x24e/0xb60 drivers/base/dd.c:595 __driver_probe_device+0x1a2/0x3d0 drivers/base/dd.c:755 driver_probe_device+0x50/0x420 drivers/base/dd.c:785 __driver_attach+0x479/0x690 drivers/base/dd.c:1164 bus_for_each_dev+0x17c/0x1f0 drivers/base/bus.c:303 serio_attach_driver drivers/input/serio/serio.c:807 [inline] serio_handle_event+0x56a/0x8f0 drivers/input/serio/serio.c:227 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 } ... key at: [] input_allocate_device.__key.6+0x0/0x20 -> (&client->buffer_lock){....}-{2:2} { INITIAL USE at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:363 [inline] evdev_pass_values+0xe7/0xb60 drivers/input/evdev.c:261 evdev_events+0x198/0x2c0 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:126 [inline] input_pass_values+0x873/0x1200 drivers/input/input.c:156 input_handle_event+0xc9b/0x1600 drivers/input/input.c:415 input_inject_event+0x1fc/0x300 drivers/input/input.c:487 evdev_write+0x668/0x7c0 drivers/input/evdev.c:530 vfs_write+0x30c/0xe50 fs/read_write.c:592 ksys_write+0x1a2/0x2c0 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 } ... key at: [] evdev_open.__key.23+0x0/0x20 ... acquired at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:363 [inline] evdev_pass_values+0xe7/0xb60 drivers/input/evdev.c:261 evdev_events+0x198/0x2c0 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:126 [inline] input_pass_values+0x873/0x1200 drivers/input/input.c:156 input_handle_event+0xc9b/0x1600 drivers/input/input.c:415 input_inject_event+0x1fc/0x300 drivers/input/input.c:487 evdev_write+0x668/0x7c0 drivers/input/evdev.c:530 vfs_write+0x30c/0xe50 fs/read_write.c:592 ksys_write+0x1a2/0x2c0 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> (&new->fa_lock){....}-{2:2} { INITIAL USE at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline] _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:316 fasync_remove_entry+0xfb/0x1d0 fs/fcntl.c:885 lease_modify+0x19c/0x380 fs/locks.c:1480 locks_remove_lease fs/locks.c:2711 [inline] locks_remove_file+0x5d3/0x1040 fs/locks.c:2736 __fput+0x368/0x8e0 fs/file_table.c:272 task_work_run+0x129/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 INITIAL READ USE at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:1008 [inline] kill_fasync+0x16a/0x490 fs/fcntl.c:1029 lease_break_callback+0x22/0x30 fs/locks.c:613 __break_lease+0x4d1/0x13b0 fs/locks.c:1615 break_lease include/linux/fs.h:2652 [inline] do_dentry_open+0x77a/0xfb0 fs/open.c:817 do_open fs/namei.c:3608 [inline] path_openat+0x2705/0x2f20 fs/namei.c:3742 do_filp_open+0x21c/0x460 fs/namei.c:3769 do_sys_openat2+0x13b/0x4f0 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1280 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 } ... key at: [] fasync_insert_entry.__key+0x0/0x20 ... acquired at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:1008 [inline] kill_fasync+0x16a/0x490 fs/fcntl.c:1029 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x5ad/0xb60 drivers/input/evdev.c:278 evdev_events+0x198/0x2c0 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:126 [inline] input_pass_values+0x873/0x1200 drivers/input/input.c:156 input_handle_event+0xc9b/0x1600 drivers/input/input.c:415 input_inject_event+0x1fc/0x300 drivers/input/input.c:487 evdev_write+0x668/0x7c0 drivers/input/evdev.c:530 vfs_write+0x30c/0xe50 fs/read_write.c:592 ksys_write+0x1a2/0x2c0 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> (&f->f_owner.lock){....}-{2:2} { INITIAL USE at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline] _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:316 __f_setown+0x38/0x350 fs/fcntl.c:91 generic_add_lease fs/locks.c:1900 [inline] generic_setlease+0xf12/0x1390 fs/locks.c:1980 vfs_setlease fs/locks.c:2070 [inline] do_fcntl_add_lease fs/locks.c:2091 [inline] fcntl_setlease+0x341/0x3f0 fs/locks.c:2113 do_fcntl+0x10a/0x1600 fs/fcntl.c:413 __do_sys_fcntl fs/fcntl.c:466 [inline] __se_sys_fcntl+0xd8/0x1b0 fs/fcntl.c:451 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 INITIAL READ USE at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 send_sigio+0x2f/0x330 fs/fcntl.c:790 kill_fasync_rcu fs/fcntl.c:1015 [inline] kill_fasync+0x20c/0x490 fs/fcntl.c:1029 lease_break_callback+0x22/0x30 fs/locks.c:613 __break_lease+0x4d1/0x13b0 fs/locks.c:1615 break_lease include/linux/fs.h:2652 [inline] do_dentry_open+0x77a/0xfb0 fs/open.c:817 do_open fs/namei.c:3608 [inline] path_openat+0x2705/0x2f20 fs/namei.c:3742 do_filp_open+0x21c/0x460 fs/namei.c:3769 do_sys_openat2+0x13b/0x4f0 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1280 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 } ... key at: [] __alloc_file.__key+0x0/0x10 ... acquired at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236 send_sigio+0x2f/0x330 fs/fcntl.c:790 kill_fasync_rcu fs/fcntl.c:1015 [inline] kill_fasync+0x20c/0x490 fs/fcntl.c:1029 lease_break_callback+0x22/0x30 fs/locks.c:613 __break_lease+0x4d1/0x13b0 fs/locks.c:1615 break_lease include/linux/fs.h:2652 [inline] do_dentry_open+0x77a/0xfb0 fs/open.c:817 do_open fs/namei.c:3608 [inline] path_openat+0x2705/0x2f20 fs/namei.c:3742 do_filp_open+0x21c/0x460 fs/namei.c:3769 do_sys_openat2+0x13b/0x4f0 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1280 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock: -> (tasklist_lock){.+.+}-{2:2} { HARDIRQ-ON-R at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x2a7/0xaf0 kernel/exit.c:1578 kernel_wait+0xe5/0x230 kernel/exit.c:1768 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 SOFTIRQ-ON-R at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x2a7/0xaf0 kernel/exit.c:1578 kernel_wait+0xe5/0x230 kernel/exit.c:1768 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 INITIAL USE at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline] _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:316 copy_process+0x22be/0x3ef0 kernel/fork.c:2336 kernel_clone+0x210/0x960 kernel/fork.c:2603 kernel_thread+0x168/0x1e0 kernel/fork.c:2655 rest_init+0x21/0x330 init/main.c:706 start_kernel+0x48c/0x540 init/main.c:1140 secondary_startup_64_no_verify+0xb1/0xbb INITIAL READ USE at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x2a7/0xaf0 kernel/exit.c:1578 kernel_wait+0xe5/0x230 kernel/exit.c:1768 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xb5/0x220 kernel/umh.c:166 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 } ... key at: [] tasklist_lock+0x18/0x40 ... acquired at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 send_sigurg+0xc8/0x380 fs/fcntl.c:845 sk_send_sigurg+0x6a/0xb0 net/core/sock.c:3128 tcp_check_urg net/ipv4/tcp_input.c:5672 [inline] tcp_urg+0x2b8/0xb40 net/ipv4/tcp_input.c:5713 tcp_rcv_established+0xe33/0x1e20 net/ipv4/tcp_input.c:6047 tcp_v4_do_rcv+0x423/0x960 net/ipv4/tcp_ipv4.c:1731 sk_backlog_rcv include/net/sock.h:1061 [inline] __release_sock+0x198/0x4b0 net/core/sock.c:2724 release_sock+0x5d/0x1c0 net/core/sock.c:3265 tcp_sendmsg+0x36/0x40 net/ipv4/tcp.c:1458 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2436 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2490 __sys_sendmmsg+0x2bf/0x560 net/socket.c:2576 __do_sys_sendmmsg net/socket.c:2605 [inline] __se_sys_sendmmsg net/socket.c:2602 [inline] __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2602 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 stack backtrace: CPU: 1 PID: 5611 Comm: syz.2.405 Not tainted 5.15.175-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 print_bad_irq_dependency kernel/locking/lockdep.c:2567 [inline] check_irq_usage kernel/locking/lockdep.c:2806 [inline] check_prev_add kernel/locking/lockdep.c:3057 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x4d01/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 send_sigurg+0xc8/0x380 fs/fcntl.c:845 sk_send_sigurg+0x6a/0xb0 net/core/sock.c:3128 tcp_check_urg net/ipv4/tcp_input.c:5672 [inline] tcp_urg+0x2b8/0xb40 net/ipv4/tcp_input.c:5713 tcp_rcv_established+0xe33/0x1e20 net/ipv4/tcp_input.c:6047 tcp_v4_do_rcv+0x423/0x960 net/ipv4/tcp_ipv4.c:1731 sk_backlog_rcv include/net/sock.h:1061 [inline] __release_sock+0x198/0x4b0 net/core/sock.c:2724 release_sock+0x5d/0x1c0 net/core/sock.c:3265 tcp_sendmsg+0x36/0x40 net/ipv4/tcp.c:1458 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2436 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2490 __sys_sendmmsg+0x2bf/0x560 net/socket.c:2576 __do_sys_sendmmsg net/socket.c:2605 [inline] __se_sys_sendmmsg net/socket.c:2602 [inline] __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2602 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f977f593d29 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:00007f977d404038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f977f783fa0 RCX: 00007f977f593d29 RDX: 0000000000000001 RSI: 000000002000a2c0 RDI: 0000000000000003 RBP: 00007f977f60faa8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000040805 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f977f783fa0 R15: 00007ffe0dbdb6f8