rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: {
0-...D
} 2692 jiffies s: 97209 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 591 Comm: syz.4.6641 Not tainted 6.12.0-rc4-syzkaller-00059-gc67e9601e29a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:io_serial_in+0x87/0xb0 drivers/tty/serial/8250/8250_port.c:407
Code: 68 b5 fe 48 8d 7d 40 44 89 e1 48 b8 00 00 00 00 00 fc ff df 48 89 fa d3 e3 48 c1 ea 03 80 3c 02 00 75 1a 66 03 5d 40 89 da ec <5b> 0f b6 c0 5d 41 5c c3 cc cc cc cc e8 78 ef 0d ff eb a2 e8 01 f0
RSP: 0000:ffffc90000006f00 EFLAGS: 00000002
RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: ffffffff82a08a30 RDI: ffffffff93637660
RBP: ffffffff93637620 R08: 0000000000000001 R09: 000000000000001f
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000020 R14: fffffbfff26c6f1e R15: dffffc0000000000
FS: 000055557a2b5500(0000) GS:ffff8881f5800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f23593f9a28 CR3: 0000000113b64000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
serial_in drivers/tty/serial/8250/8250.h:137 [inline]
serial_lsr_in drivers/tty/serial/8250/8250.h:159 [inline]
wait_for_lsr+0xda/0x180 drivers/tty/serial/8250/8250_port.c:2068
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3315 [inline]
serial8250_console_write+0xf5a/0x17c0 drivers/tty/serial/8250/8250_port.c:3393
console_emit_next_record kernel/printk/printk.c:3092 [inline]
console_flush_all+0x800/0xc60 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:lockdep_enabled kernel/locking/lockdep.c:116 [inline]
RIP: 0010:lock_release+0xbe/0x6f0 kernel/locking/lockdep.c:5838
Code: 00 48 89 e8 48 c1 e8 06 48 8d 3c c5 c8 4e 56 8a e8 c7 27 7b 00 48 0f a3 2d 97 f4 22 09 0f 82 3a 04 00 00 48 c7 c5 78 5e 56 8a <48> b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 0f b6 14 02 48
RSP: 0000:ffffc900041e7d80 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 1ffff9200083cfb2 RCX: ffffffff81335a29
RDX: 0000000000000000 RSI: ffffffff8746eb40 RDI: ffffffff8892ca60
RBP: ffffffff8a565e78 R08: 0000000000000000 R09: fffffbfff14ac9d9
R10: ffffffff8a564ecf R11: 0000000000000000 R12: ffffffff88ebb140
R13: ffff888113838020 R14: 000000000003c40c R15: ffff8881327457c0
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
count_memcg_events_mm.constprop.0+0x13d/0x340 include/linux/memcontrol.h:1046
count_memcg_event_mm include/linux/memcontrol.h:1052 [inline]
mm_account_fault mm/memory.c:5932 [inline]
handle_mm_fault+0x5cc/0xaa0 mm/memory.c:6092
do_user_addr_fault+0x613/0x12c0 arch/x86/mm/fault.c:1338
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f235910e8bf
Code: 1f 84 00 00 00 00 00 0f 1f 40 00 41 89 fb 44 8d 56 04 4c 8d 0d 52 37 2e 00 89 f0 4c 8d 05 49 17 2e 00 89 c2 81 e2 ff 1f 00 00 <49> 8b 0c d1 48 39 f1 74 28 48 85 c9 74 29 45 38 1c 10 75 23 83 c0
RSP: 002b:00007ffedd60d218 EFLAGS: 00010202
RAX: 0000000081162f45 RBX: 00007f2359f35720 RCX: 0000000000000005
RDX: 0000000000000f45 RSI: ffffffff81162f45 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00007f23593f0000 R09: 00007f23593f2000
R10: 0000000081162f49 R11: 0000000000000000 R12: ffffffff81162e6d
R13: 00007f2359406018 R14: 0000000000000008 R15: 000000000000000c
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6869
__cond_resched+0x1b/0x30 kernel/sched/core.c:7214
_cond_resched include/linux/sched.h:2031 [inline]
stop_one_cpu+0x112/0x190 kernel/stop_machine.c:151
sched_exec+0x1dc/0x270 kernel/sched/core.c:5459
bprm_execve fs/exec.c:1838 [inline]
bprm_execve+0x46c/0x1950 fs/exec.c:1821
kernel_execve+0x2ef/0x3b0 fs/exec.c:2012
call_usermodehelper_exec_async+0x255/0x4c0 kernel/umh.c:110
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
task:kworker/u8:4 state:R
running task
stack:32568 pid:847 tgid:847 ppid:642 flags:0x00004000
Call Trace:
__switch_to_asm+0x70/0x70
task:modprobe state:R
running task stack:25136 pid:848 tgid:848 ppid:723 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
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: 0033:0x7f471403ca90
RSP: 002b:00007ffc86eeaa28 EFLAGS: 00000246
ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f471412d860 RCX: 00007f471403ca90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007f471412d860 R08: 0000000000000001 R09: 88f68f7fe114d8d2
R10: 00007ffc86eea8e0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f4714131658 R15: 0000000000000001
task:kworker/u8:8 state:I
stack:30928 pid:852 tgid:852 ppid:2 flags:0x00004000
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
worker_thread+0x2de/0xf00 kernel/workqueue.c:3406
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
Showing all locks held in the system:
2 locks held by getty/2920:
#0:
ffff888100eae0a0 (&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
3 locks held by kworker/0:4/5258:
#0:
ffff888100eed548 ((wq_completion)pm){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204
#1: ffffc9000289fd80 ((work_completion)(&hcd->wakeup_work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
#2: ffff88810b355190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#2: ffff88810b355190 (&dev->mutex){....}-{3:3}, at: usb_remote_wakeup+0x21/0xe0 drivers/usb/core/hub.c:3840
6 locks held by kworker/1:0/10972:
#0:
ffff8881062cb548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204
#1: ffffc9000185fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
#2: ffff88810b710190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#2: ffff88810b710190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5849
#3:
ffff888102f88190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
ffff888102f88190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x10a/0x920 drivers/usb/core/hub.c:2295
#4: ffff888115ce4160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#4: ffff888115ce4160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#4: ffff888115ce4160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1293
#5: ffff888117d55a20 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#5: ffff888117d55a20 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#5: ffff888117d55a20 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1293
1 lock held by syz.6.6636/579:
#0:
ffffffff88ec6a38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329
1 lock held by syz.5.6639/587:
#0: ffffffff88ec6a38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:297
6 locks held by syz.4.6641/591:
#0: ffff88810dfb1d18 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:704 [inline]
#0: ffff88810dfb1d18 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x13e/0x980 mm/memory.c:6232
#1:
ffffffff88ebb140 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
ffffffff88ebb140 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
ffffffff88ebb140 (rcu_read_lock){....}-{1:2}, at: count_memcg_events_mm.constprop.0+0x3a/0x340 include/linux/memcontrol.h:1042
#2: ffff88812df2f230 (&dev->event_lock){..-.}-{2:2}, at: input_event drivers/input/input.c:397 [inline]
#2: ffff88812df2f230 (&dev->event_lock){..-.}-{2:2}, 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]
#3: ffffffff88ebb140 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#3: ffffffff88ebb140 (rcu_read_lock){....}-{1:2}, 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]
#4: ffffffff89387a58 (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]
#5: ffffffff88ebb140 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#5: ffffffff88ebb140 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720
=============================================
keytouch 0003:0926:3333.03C4: can't resubmit intr, dummy_hcd.7-1/input0, status -19