rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-...D } 2641 jiffies s: 90333 root: 0x1/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 1 to CPUs 0: schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2591 NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 4979 Comm: kworker/0:5 Not tainted 6.12.0-rc4-syzkaller-00052-gc6d9e43954bf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events console_callback RIP: 0010:__sanitizer_cov_trace_pc+0x4d/0x70 kernel/kcov.c:223 Code: a9 00 00 0f 00 75 3c a9 00 00 f0 00 75 35 8b 82 54 15 00 00 85 c0 74 2b 8b 82 30 15 00 00 83 f8 02 75 20 48 8b 8a 38 15 00 00 <8b> 92 34 15 00 00 48 8b 01 48 83 c0 01 48 39 d0 73 07 48 89 01 48 RSP: 0018:ffffc90000006af0 EFLAGS: 00000046 RAX: 0000000000000002 RBX: ffffffff8728c784 RCX: ffffc90001001000 RDX: ffff8881017e0000 RSI: ffffffff86e6a082 RDI: 0000000000000001 RBP: 0000000000000075 R08: 0000000000000001 R09: 0000000000000078 R10: 0000000000000075 R11: 000000000125e058 R12: ffffc90000006bf8 R13: 000000000000006c R14: 0000000000000075 R15: 0000000000000005 FS: 0000000000000000(0000) GS:ffff8881f5800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe46fd156c0 CR3: 00000001142ec000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: format_decode+0x4b2/0xba0 lib/vsprintf.c:2664 vsnprintf+0x13d/0x1880 lib/vsprintf.c:2755 sprintf+0xcd/0x110 lib/vsprintf.c:3007 print_time kernel/printk/printk.c:1362 [inline] info_print_prefix+0x25c/0x350 kernel/printk/printk.c:1388 record_print_text+0x141/0x400 kernel/printk/printk.c:1437 printk_get_next_message+0x2a6/0x670 kernel/printk/printk.c:2978 console_emit_next_record kernel/printk/printk.c:3046 [inline] console_flush_all+0x6ec/0xc60 kernel/printk/printk.c:3180 __console_flush_and_unlock kernel/printk/printk.c:3239 [inline] console_unlock+0xd9/0x210 kernel/printk/printk.c:3279 vprintk_emit+0x424/0x6f0 kernel/printk/printk.c:2407 vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:68 _printk+0xc8/0x100 kernel/printk/printk.c:2432 printk_stack_address arch/x86/kernel/dumpstack.c:72 [inline] show_trace_log_lvl+0x1b7/0x3d0 arch/x86/kernel/dumpstack.c:285 sched_show_task kernel/sched/core.c:7604 [inline] sched_show_task+0x3f0/0x5f0 kernel/sched/core.c:7579 show_state_filter+0xee/0x320 kernel/sched/core.c:7649 k_spec drivers/tty/vt/keyboard.c:667 [inline] k_spec+0xed/0x150 drivers/tty/vt/keyboard.c:656 kbd_keycode drivers/tty/vt/keyboard.c:1522 [inline] kbd_event+0xcbd/0x17a0 drivers/tty/vt/keyboard.c:1541 input_handler_events_default+0x116/0x1b0 drivers/input/input.c:2549 input_pass_values+0x777/0x8e0 drivers/input/input.c:126 input_event_dispose drivers/input/input.c:352 [inline] input_handle_event+0xb30/0x14d0 drivers/input/input.c:369 input_event drivers/input/input.c:398 [inline] input_event+0x83/0xa0 drivers/input/input.c:390 hidinput_hid_event+0xa12/0x2410 drivers/hid/hid-input.c:1719 hid_process_event+0x4b7/0x5e0 drivers/hid/hid-core.c:1540 hid_input_array_field+0x535/0x710 drivers/hid/hid-core.c:1652 hid_process_report drivers/hid/hid-core.c:1694 [inline] hid_report_raw_event+0xa02/0x11c0 drivers/hid/hid-core.c:2040 __hid_input_report.constprop.0+0x341/0x440 drivers/hid/hid-core.c:2110 hid_irq_in+0x35e/0x870 drivers/hid/usbhid/hid-core.c:285 __usb_hcd_giveback_urb+0x389/0x6e0 drivers/usb/core/hcd.c:1650 usb_hcd_giveback_urb+0x396/0x450 drivers/usb/core/hcd.c:1734 dummy_timer+0x17f0/0x3930 drivers/usb/gadget/udc/dummy_hcd.c:1993 __run_hrtimer kernel/time/hrtimer.c:1691 [inline] __hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1755 hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1772 handle_softirqs+0x206/0x8d0 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:637 [inline] irq_exit_rcu+0xac/0x110 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:console_flush_all+0x9a4/0xc60 kernel/printk/printk.c:3181 Code: 00 e8 f0 4a 27 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 4e aa 1f 00 48 85 db 0f 85 55 01 00 00 e8 d0 a7 1f 00 fb 4c 89 e0 <48> c1 e8 03 42 80 3c 38 00 0f 84 11 ff ff ff 4c 89 e7 e8 65 2f 78 RSP: 0018:ffffc900020bfa70 EFLAGS: 00000293 RAX: ffffffff8939d738 RBX: 0000000000000000 RCX: ffffffff81364ae2 RDX: ffff8881017e0000 RSI: ffffffff81364af0 RDI: 0000000000000007 RBP: 0000000000000001 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8939d738 R13: ffffffff8939d6e0 R14: ffffc900020bfb00 R15: dffffc0000000000 __console_flush_and_unlock kernel/printk/printk.c:3239 [inline] console_unlock+0xd9/0x210 kernel/printk/printk.c:3279 console_callback+0x27d/0x4c0 drivers/tty/vt/vt.c:3150 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x3e1/0x600 kernel/sched/completion.c:116 wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion_interruptible+0x1f/0x40 kernel/sched/completion.c:216 raw_process_ep_io+0x5d7/0xb90 drivers/usb/gadget/legacy/raw_gadget.c:1121 raw_ioctl_ep_write drivers/usb/gadget/legacy/raw_gadget.c:1152 [inline] raw_ioctl+0xa4d/0x2b90 drivers/usb/gadget/legacy/raw_gadget.c:1324 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x18f/0x220 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3ffc39dbfb RSP: 002b:00007f3ffb015f70 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000ffffff75 RCX: 00007f3ffc39dbfb RDX: 00007f3ffb015ff0 RSI: 0000000040085507 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00007f3ffc680320 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 00000000200002c0 R13: 0000000000000000 R14: 00007f3ffc555f80 R15: 00007ffd3566bc68 task:syz.3.6234 state:D stack:28656 pid:30065 tgid:30064 ppid:28089 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6782 synchronize_rcu_expedited+0x392/0x450 kernel/rcu/tree_exp.h:991 module_remove_driver+0x2e/0x260 drivers/base/module.c:106 bus_remove_driver+0x143/0x2c0 drivers/base/bus.c:745 driver_unregister+0x76/0xb0 drivers/base/driver.c:274 usb_gadget_register_driver_owner+0x20f/0x330 drivers/usb/gadget/udc/core.c:1722 raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:595 [inline] raw_ioctl+0x1731/0x2b90 drivers/usb/gadget/legacy/raw_gadget.c:1306 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x18f/0x220 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb7a3cfdbfb RSP: 002b:00007fb7a2974f10 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007fb7a3cfdbfb RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000006 RBP: 00007fb7a2975fe0 R08: 0000000000000000 R09: 00332e6364755f79 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb7a2974fb0 R14: 0000000020001000 R15: 00007fb7a3fe1c58 task:syz.0.6236 state:D stack:28256 pid:30070 tgid:30069 ppid:26887 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6782 exp_funnel_lock+0x344/0x3b0 kernel/rcu/tree_exp.h:320 synchronize_rcu_expedited+0x290/0x450 kernel/rcu/tree_exp.h:976 module_remove_driver+0x2e/0x260 drivers/base/module.c:106 bus_remove_driver+0x143/0x2c0 drivers/base/bus.c:745 driver_unregister+0x76/0xb0 drivers/base/driver.c:274 usb_gadget_unregister_driver+0x49/0x70 drivers/usb/gadget/udc/core.c:1732 raw_release+0x1ae/0x2b0 drivers/usb/gadget/legacy/raw_gadget.c:462 __fput+0x3f6/0xb60 fs/file_table.c:431 task_work_run+0x14e/0x250 kernel/task_work.c:239 get_signal+0x1ca/0x2770 kernel/signal.c:2690 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x147/0x260 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe24d4cdbfb RSP: 002b:00007fe24c13ef10 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 00007fe24d4cdbfb RDX: 00007fe24c13ffe0 RSI: 0000000080085502 RDI: 0000000000000003 RBP: 00007fe24c13ffe0 R08: 0000000000000080 R09: 00007fe24c13efd8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000080085502 R13: 0000000800000000 R14: 0000000000000008 R15: 00007fe24d54a273 task:syz.4.6237 state:D stack:27856 pid:30071 tgid:30071 ppid:17586 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6782 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329 synchronize_rcu_expedited+0x290/0x450 kernel/rcu/tree_exp.h:976 module_remove_driver+0x2e/0x260 drivers/base/module.c:106 bus_remove_driver+0x143/0x2c0 drivers/base/bus.c:745 driver_unregister+0x76/0xb0 drivers/base/driver.c:274 usb_gadget_unregister_driver+0x49/0x70 drivers/usb/gadget/udc/core.c:1732 raw_release+0x1ae/0x2b0 drivers/usb/gadget/legacy/raw_gadget.c:462 __fput+0x3f6/0xb60 fs/file_table.c:431 task_work_run+0x14e/0x250 kernel/task_work.c:239 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0xadd/0x2ce0 kernel/exit.c:939 do_group_exit+0xd3/0x2a0 kernel/exit.c:1088 get_signal+0x25fb/0x2770 kernel/signal.c:2917 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x147/0x260 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f72065edff9 RSP: 002b:00007ffc091bb8b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffdfc RBX: 00007ffc091bb9e0 RCX: 00007f72065edff9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f72067a5f8c RBP: 00007f72067a5f8c R08: 00007f72072e7080 R09: 00007ffc091bbbaf R10: 00007ffc091bb9c0 R11: 0000000000000246 R12: 00000000002df189 R13: 00007ffc091bb9c0 R14: 0000000000000bea R15: 00000000002de59f task:syz.1.6238 state:D stack:28832 pid:30076 tgid:30073 ppid:28643 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6782 exp_funnel_lock+0x344/0x3b0 kernel/rcu/tree_exp.h:320 synchronize_rcu_expedited+0x290/0x450 kernel/rcu/tree_exp.h:976 module_remove_driver+0x2e/0x260 drivers/base/module.c:106 bus_remove_driver+0x143/0x2c0 drivers/base/bus.c:745 driver_unregister+0x76/0xb0 drivers/base/driver.c:274 usb_gadget_register_driver_owner+0x20f/0x330 drivers/usb/gadget/udc/core.c:1722 raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:595 [inline] raw_ioctl+0x1731/0x2b90 drivers/usb/gadget/legacy/raw_gadget.c:1306 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x18f/0x220 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe46f02dbfb RSP: 002b:00007fe46dc5cf10 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007fe46f02dbfb RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000006 RBP: 00007fe46dc5dfe0 R08: 0000000000000000 R09: 00312e6364755f79 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe46dc5cfb0 R14: 0000000020000280 R15: 00007fe46f310b88 Showing all locks held in the system: 2 locks held by getty/2606: #0: ffff888113f290a0 ( &tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900000432f0 (&ldata->atomic_read_lock){+.+.}-{3:3} , at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211 6 locks held by kworker/0:5/4979: #0: ffff888100080948 ( (wq_completion)events ){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204 #1: ffffc900020bfd80 (console_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 #2: ffff888126383230 (&dev->event_lock){..-.}-{2:2} , at: input_event drivers/input/input.c:397 [inline] , at: input_event+0x70/0xa0 drivers/input/input.c:390 #3: ffffffff88ebb140 (rcu_read_lock){....}-{1:2} , at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] , at: rcu_read_lock include/linux/rcupdate.h:849 [inline] , at: input_pass_values+0x8b/0x8e0 drivers/input/input.c:118 #4: ffffffff89387a58 (kbd_event_lock){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] (kbd_event_lock){..-.}-{2:2}, at: kbd_event+0x8a/0x17a0 drivers/tty/vt/keyboard.c:1535 #5: ffffffff88ebb140 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720 5 locks held by kworker/1:7/5439: 2 locks held by kworker/1:12/29773: 1 lock held by syz.3.6234/30065: #0: ffffffff88ec6a38 ( rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:297 1 lock held by syz.4.6237/30071: #0: ffffffff88ec6a38 (rcu_state.exp_mutex){+.+.}-{3:3} , at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329 =============================================