===================================================== WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted ----------------------------------------------------- kworker/0:4/5128 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffffffff8e8112d8 (disc_data_lock){.+.+}-{2:2}, at: sp_get+0x18/0xf0 drivers/net/hamradio/6pack.c:376 and this task is already holding: ffffffff949172f8 (&port_lock_key){-.-.}-{2:2}, at: uart_port_lock_irqsave include/linux/serial_core.h:616 [inline] ffffffff949172f8 (&port_lock_key){-.-.}-{2:2}, at: serial_port_runtime_resume+0xd3/0x340 drivers/tty/serial/serial_port.c:38 which would create a new lock dependency: (&port_lock_key){-.-.}-{2:2} -> (disc_data_lock){.+.+}-{2:2} but this new dependency connects a HARDIRQ-irq-safe lock: (&port_lock_key){-.-.}-{2:2} ... which became HARDIRQ-irq-safe at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 uart_port_lock_irqsave include/linux/serial_core.h:616 [inline] serial8250_console_write+0xaa6/0x1090 drivers/tty/serial/8250/8250_port.c:3403 console_emit_next_record kernel/printk/printk.c:2907 [inline] console_flush_all+0x53c/0xd70 kernel/printk/printk.c:2973 console_unlock+0xae/0x290 kernel/printk/printk.c:3042 vprintk_emit kernel/printk/printk.c:2342 [inline] vprintk_emit+0x11a/0x5a0 kernel/printk/printk.c:2297 vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:45 _printk+0xc8/0x100 kernel/printk/printk.c:2367 vkms_vblank_simulate+0xd4/0x3e0 drivers/gpu/drm/vkms/vkms_crtc.c:26 __run_hrtimer kernel/time/hrtimer.c:1692 [inline] __hrtimer_run_queues+0x20c/0xc20 kernel/time/hrtimer.c:1756 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1818 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x10f/0x410 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 __outl arch/x86/include/asm/shared/io.h:24 [inline] iowrite32+0x59/0x80 lib/iomap.c:225 setup_vq+0x1a4/0x2f0 drivers/virtio/virtio_pci_legacy.c:150 vp_setup_vq+0xb1/0x380 drivers/virtio/virtio_pci_common.c:189 vp_find_vqs_msix+0x661/0xe30 drivers/virtio/virtio_pci_common.c:331 vp_find_vqs+0x58/0x560 drivers/virtio/virtio_pci_common.c:408 virtio_find_vqs_ctx include/linux/virtio_config.h:242 [inline] virtnet_find_vqs drivers/net/virtio_net.c:4347 [inline] init_vqs+0xb04/0x1770 drivers/net/virtio_net.c:4436 virtnet_probe+0x15d1/0x3980 drivers/net/virtio_net.c:4756 virtio_dev_probe+0x5ff/0x9b0 drivers/virtio/virtio.c:311 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x23a/0xcb0 drivers/base/dd.c:658 __driver_probe_device+0x1de/0x4b0 drivers/base/dd.c:800 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:830 __driver_attach+0x283/0x580 drivers/base/dd.c:1216 bus_for_each_dev+0x13c/0x1d0 drivers/base/bus.c:368 bus_add_driver+0x2ed/0x640 drivers/base/bus.c:673 driver_register+0x15c/0x4b0 drivers/base/driver.c:246 virtio_net_driver_init+0xac/0xd0 drivers/net/virtio_net.c:5003 do_one_initcall+0x128/0x690 init/main.c:1241 do_initcall_level init/main.c:1303 [inline] do_initcalls init/main.c:1319 [inline] do_basic_setup init/main.c:1338 [inline] kernel_init_freeable+0x69d/0xc40 init/main.c:1550 kernel_init+0x1c/0x2a0 init/main.c:1439 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 to a HARDIRQ-irq-unsafe lock: (disc_data_lock){.+.+}-{2:2} ... which became HARDIRQ-irq-unsafe at: ... lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 sp_get+0x18/0xf0 drivers/net/hamradio/6pack.c:376 sixpack_receive_buf drivers/net/hamradio/6pack.c:439 [inline] sixpack_receive_buf+0x59/0x1c90 drivers/net/hamradio/6pack.c:430 tiocsti drivers/tty/tty_io.c:2299 [inline] tty_ioctl+0x581/0x1590 drivers/tty/tty_io.c:2717 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl fs/ioctl.c:890 [inline] __x64_sys_ioctl+0x193/0x220 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 other info that might help us debug this: Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(disc_data_lock); local_irq_disable(); lock(&port_lock_key); lock(disc_data_lock); lock(&port_lock_key); *** DEADLOCK *** 4 locks held by kworker/0:4/5128: #0: ffff888018689d48 ((wq_completion)pm){+.+.}-{0:0}, at: process_one_work+0x1296/0x1a60 kernel/workqueue.c:3229 #1: ffffc90003e4fd80 ((work_completion)(&dev->power.work)){+.+.}-{0:0}, at: process_one_work+0x906/0x1a60 kernel/workqueue.c:3230 #2: ffffffff949172f8 (&port_lock_key){-.-.}-{2:2}, at: uart_port_lock_irqsave include/linux/serial_core.h:616 [inline] #2: ffffffff949172f8 (&port_lock_key){-.-.}-{2:2}, at: serial_port_runtime_resume+0xd3/0x340 drivers/tty/serial/serial_port.c:38 #3: ffff88801b7aa0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref+0x1c/0x80 drivers/tty/tty_ldisc.c:263 the dependencies between HARDIRQ-irq-safe lock and the holding lock: -> (&port_lock_key){-.-.}-{2:2} { IN-HARDIRQ-W at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 uart_port_lock_irqsave include/linux/serial_core.h:616 [inline] serial8250_console_write+0xaa6/0x1090 drivers/tty/serial/8250/8250_port.c:3403 console_emit_next_record kernel/printk/printk.c:2907 [inline] console_flush_all+0x53c/0xd70 kernel/printk/printk.c:2973 console_unlock+0xae/0x290 kernel/printk/printk.c:3042 vprintk_emit kernel/printk/printk.c:2342 [inline] vprintk_emit+0x11a/0x5a0 kernel/printk/printk.c:2297 vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:45 _printk+0xc8/0x100 kernel/printk/printk.c:2367 vkms_vblank_simulate+0xd4/0x3e0 drivers/gpu/drm/vkms/vkms_crtc.c:26 __run_hrtimer kernel/time/hrtimer.c:1692 [inline] __hrtimer_run_queues+0x20c/0xc20 kernel/time/hrtimer.c:1756 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1818 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x10f/0x410 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 __outl arch/x86/include/asm/shared/io.h:24 [inline] iowrite32+0x59/0x80 lib/iomap.c:225 setup_vq+0x1a4/0x2f0 drivers/virtio/virtio_pci_legacy.c:150 vp_setup_vq+0xb1/0x380 drivers/virtio/virtio_pci_common.c:189 vp_find_vqs_msix+0x661/0xe30 drivers/virtio/virtio_pci_common.c:331 vp_find_vqs+0x58/0x560 drivers/virtio/virtio_pci_common.c:408 virtio_find_vqs_ctx include/linux/virtio_config.h:242 [inline] virtnet_find_vqs drivers/net/virtio_net.c:4347 [inline] init_vqs+0xb04/0x1770 drivers/net/virtio_net.c:4436 virtnet_probe+0x15d1/0x3980 drivers/net/virtio_net.c:4756 virtio_dev_probe+0x5ff/0x9b0 drivers/virtio/virtio.c:311 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x23a/0xcb0 drivers/base/dd.c:658 __driver_probe_device+0x1de/0x4b0 drivers/base/dd.c:800 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:830 __driver_attach+0x283/0x580 drivers/base/dd.c:1216 bus_for_each_dev+0x13c/0x1d0 drivers/base/bus.c:368 bus_add_driver+0x2ed/0x640 drivers/base/bus.c:673 driver_register+0x15c/0x4b0 drivers/base/driver.c:246 virtio_net_driver_init+0xac/0xd0 drivers/net/virtio_net.c:5003 do_one_initcall+0x128/0x690 init/main.c:1241 do_initcall_level init/main.c:1303 [inline] do_initcalls init/main.c:1319 [inline] do_basic_setup init/main.c:1338 [inline] kernel_init_freeable+0x69d/0xc40 init/main.c:1550 kernel_init+0x1c/0x2a0 init/main.c:1439 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 IN-SOFTIRQ-W at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 uart_port_lock_irqsave include/linux/serial_core.h:616 [inline] serial8250_handle_irq+0x95/0x780 drivers/tty/serial/8250/8250_port.c:1913 serial8250_default_handle_irq+0x9a/0x210 drivers/tty/serial/8250/8250_port.c:1962 serial8250_interrupt+0x103/0x210 drivers/tty/serial/8250/8250_core.c:127 __handle_irq_event_percpu+0x229/0x750 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x263/0xd10 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq arch/x86/kernel/irq.c:238 [inline] __common_interrupt+0xde/0x250 arch/x86/kernel/irq.c:257 common_interrupt+0x52/0xd0 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 unwind_next_frame+0x5e4/0x23a0 arch/x86/kernel/unwind_orc.c:505 arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:240 [inline] __kasan_slab_free+0x11d/0x1a0 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2106 [inline] slab_free mm/slub.c:4280 [inline] kmem_cache_free+0x12e/0x360 mm/slub.c:4344 rcu_do_batch kernel/rcu/tree.c:2196 [inline] rcu_core+0x828/0x16b0 kernel/rcu/tree.c:2471 __do_softirq+0x218/0x8de kernel/softirq.c:554 invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:633 [inline] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 check_kcov_mode kernel/kcov.c:173 [inline] write_comp_data+0x2e/0x90 kernel/kcov.c:236 __sanitizer_cov_trace_switch+0x54/0x90 kernel/kcov.c:341 unwind_next_frame+0x789/0x23a0 arch/x86/kernel/unwind_orc.c:581 arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc+0x136/0x320 mm/slub.c:3852 kmem_cache_zalloc include/linux/slab.h:739 [inline] __kernfs_new_node+0xd3/0x8a0 fs/kernfs/dir.c:615 kernfs_new_node+0x18c/0x240 fs/kernfs/dir.c:691 __kernfs_create_file+0x53/0x340 fs/kernfs/file.c:1025 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:307 create_files fs/sysfs/group.c:64 [inline] internal_create_group+0x31f/0xb50 fs/sysfs/group.c:152 internal_create_groups+0x9d/0x150 fs/sysfs/group.c:192 device_add_groups drivers/base/core.c:2741 [inline] device_add_attrs drivers/base/core.c:2850 [inline] device_add+0x710/0x1ab0 drivers/base/core.c:3593 netdev_register_kobject+0x187/0x3f0 net/core/net-sysfs.c:2136 register_netdevice+0x12c8/0x1ca0 net/core/dev.c:10274 bpq_new_device drivers/net/hamradio/bpqether.c:499 [inline] bpq_device_event+0x3a2/0xaf0 drivers/net/hamradio/bpqether.c:542 notifier_call_chain+0xb9/0x3e0 kernel/notifier.c:93 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1950 call_netdevice_notifiers_extack net/core/dev.c:1988 [inline] call_netdevice_notifiers net/core/dev.c:2002 [inline] __dev_notify_flags+0x12d/0x2e0 net/core/dev.c:8722 dev_change_flags+0x10c/0x160 net/core/dev.c:8760 devinet_ioctl+0x127a/0x1f10 net/ipv4/devinet.c:1172 inet_ioctl+0x3aa/0x3f0 net/ipv4/af_inet.c:1001 sock_do_ioctl+0x116/0x280 net/socket.c:1222 sock_ioctl+0x22e/0x6c0 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl fs/ioctl.c:890 [inline] __x64_sys_ioctl+0x193/0x220 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 uart_port_lock_irqsave include/linux/serial_core.h:616 [inline] serial8250_do_set_termios+0x334/0x1270 drivers/tty/serial/8250/8250_port.c:2793 serial8250_set_termios+0x6e/0x80 drivers/tty/serial/8250/8250_port.c:2912 uart_set_options+0x31b/0x5f0 drivers/tty/serial/serial_core.c:2320 serial8250_console_setup+0x18a/0x460 drivers/tty/serial/8250/8250_port.c:3507 univ8250_console_setup+0x16c/0x210 drivers/tty/serial/8250/8250_core.c:632 try_enable_preferred_console+0x253/0x480 kernel/printk/printk.c:3308 register_console+0x30e/0x1060 kernel/printk/printk.c:3485 univ8250_console_init+0x35/0x50 drivers/tty/serial/8250/8250_core.c:717 console_init+0xcc/0x5e0 kernel/printk/printk.c:3694 start_kernel+0x259/0x490 init/main.c:1012 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:509 x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:490 common_startup_64+0x13e/0x148 } ... key at: [] port_lock_key+0x0/0x40 the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock: -> (disc_data_lock){.+.+}-{2:2} { HARDIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 sp_get+0x18/0xf0 drivers/net/hamradio/6pack.c:376 sixpack_receive_buf drivers/net/hamradio/6pack.c:439 [inline] sixpack_receive_buf+0x59/0x1c90 drivers/net/hamradio/6pack.c:430 tiocsti drivers/tty/tty_io.c:2299 [inline] tty_ioctl+0x581/0x1590 drivers/tty/tty_io.c:2717 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl fs/ioctl.c:890 [inline] __x64_sys_ioctl+0x193/0x220 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 SOFTIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 sp_get+0x18/0xf0 drivers/net/hamradio/6pack.c:376 sixpack_receive_buf drivers/net/hamradio/6pack.c:439 [inline] sixpack_receive_buf+0x59/0x1c90 drivers/net/hamradio/6pack.c:430 tiocsti drivers/tty/tty_io.c:2299 [inline] tty_ioctl+0x581/0x1590 drivers/tty/tty_io.c:2717 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl fs/ioctl.c:890 [inline] __x64_sys_ioctl+0x193/0x220 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0x36/0x50 kernel/locking/spinlock.c:326 sixpack_close+0x1e/0x2d0 drivers/net/hamradio/6pack.c:653 tty_ldisc_close+0x111/0x1a0 drivers/tty/tty_ldisc.c:455 tty_ldisc_kill+0x8e/0x150 drivers/tty/tty_ldisc.c:607 tty_ldisc_release+0x17b/0x2a0 drivers/tty/tty_ldisc.c:775 tty_release_struct+0x23/0xe0 drivers/tty/tty_io.c:1696 tty_release+0xe33/0x1420 drivers/tty/tty_io.c:1867 __fput+0x270/0xb80 fs/file_table.c:422 __fput_sync+0x47/0x50 fs/file_table.c:507 __do_sys_close fs/open.c:1556 [inline] __se_sys_close fs/open.c:1541 [inline] __x64_sys_close+0x86/0x100 fs/open.c:1541 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 sp_get+0x18/0xf0 drivers/net/hamradio/6pack.c:376 sixpack_receive_buf drivers/net/hamradio/6pack.c:439 [inline] sixpack_receive_buf+0x59/0x1c90 drivers/net/hamradio/6pack.c:430 tiocsti drivers/tty/tty_io.c:2299 [inline] tty_ioctl+0x581/0x1590 drivers/tty/tty_io.c:2717 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl fs/ioctl.c:890 [inline] __x64_sys_ioctl+0x193/0x220 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 } ... key at: [] disc_data_lock+0x18/0xf20 ... acquired at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 sp_get+0x18/0xf0 drivers/net/hamradio/6pack.c:376 sixpack_write_wakeup+0x20/0x390 drivers/net/hamradio/6pack.c:397 tty_wakeup+0xe5/0x120 drivers/tty/tty_io.c:523 tty_port_default_wakeup+0x2a/0x40 drivers/tty/tty_port.c:69 serial8250_tx_chars+0x55a/0x8b0 drivers/tty/serial/8250/8250_port.c:1835 __start_tx+0x3e9/0x4a0 drivers/tty/serial/8250/8250_port.c:1544 serial8250_start_tx+0x363/0x530 drivers/tty/serial/8250/8250_port.c:1653 serial_port_runtime_resume+0x2a4/0x340 drivers/tty/serial/serial_port.c:40 __rpm_callback+0xc5/0x4c0 drivers/base/power/runtime.c:394 rpm_callback+0x1da/0x220 drivers/base/power/runtime.c:448 rpm_resume+0xcf9/0x12f0 drivers/base/power/runtime.c:914 pm_runtime_work+0x10c/0x150 drivers/base/power/runtime.c:979 process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 stack backtrace: CPU: 0 PID: 5128 Comm: kworker/0:4 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: pm pm_runtime_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_bad_irq_dependency kernel/locking/lockdep.c:2626 [inline] check_irq_usage+0xe3c/0x1490 kernel/locking/lockdep.c:2865 check_prev_add kernel/locking/lockdep.c:3138 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x248e/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 sp_get+0x18/0xf0 drivers/net/hamradio/6pack.c:376 sixpack_write_wakeup+0x20/0x390 drivers/net/hamradio/6pack.c:397 tty_wakeup+0xe5/0x120 drivers/tty/tty_io.c:523 tty_port_default_wakeup+0x2a/0x40 drivers/tty/tty_port.c:69 serial8250_tx_chars+0x55a/0x8b0 drivers/tty/serial/8250/8250_port.c:1835 __start_tx+0x3e9/0x4a0 drivers/tty/serial/8250/8250_port.c:1544 serial8250_start_tx+0x363/0x530 drivers/tty/serial/8250/8250_port.c:1653 serial_port_runtime_resume+0x2a4/0x340 drivers/tty/serial/serial_port.c:40 __rpm_callback+0xc5/0x4c0 drivers/base/power/runtime.c:394 rpm_callback+0x1da/0x220 drivers/base/power/runtime.c:448 rpm_resume+0xcf9/0x12f0 drivers/base/power/runtime.c:914 pm_runtime_work+0x10c/0x150 drivers/base/power/runtime.c:979 process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243