rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: {
 1-...D } 2636 jiffies s: 41153 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):

Sending NMI from CPU 0 to CPUs 1:
, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900000432f0 (&ldata->atomic_read_lock){+.+.}-{3:3}
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 4897 Comm: udevd Not tainted 6.12.0-rc4-syzkaller-00052-gc6d9e43954bf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__sanitizer_cov_trace_pc+0x46/0x70 kernel/kcov.c:220
Code: 74 1d f6 c4 01 74 43 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
RSP: 0018:ffffc900001b7bc8 EFLAGS: 00000046
RAX: 0000000000000002 RBX: ffffffff8728c781 RCX: ffffffff86e69d60
RDX: ffff88811c8bd7c0 RSI: ffffffff86e69d71 RDI: 0000000000000001
RBP: 0000000000000025 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000025 R11: 00000000006c98e0 R12: ffffc900001b7cd0
R13: ffffffff8728c781 R14: 0000000000000001 R15: dffffc0000000000
FS:  00007f8130223c80(0000) GS:ffff8881f5900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f09eab22000 CR3: 000000011b3cc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 format_decode+0x1a1/0xba0 lib/vsprintf.c:2538
 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
 print_lock_name kernel/locking/lockdep.c:742 [inline]
 print_lock+0x19f/0x310 kernel/locking/lockdep.c:779
 lockdep_print_held_locks+0x10f/0x220 kernel/locking/lockdep.c:800
 debug_show_all_locks+0x1ac/0x390 kernel/locking/lockdep.c:6724
 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire.part.0+0x155/0x380 kernel/locking/lockdep.c:5790
Code: b8 ff ff ff ff 65 0f c1 05 50 1f cf 7e 83 f8 01 0f 85 d0 01 00 00 9c 58 f6 c4 02 0f 85 e5 01 00 00 48 85 ed 0f 85 b6 01 00 00 <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7
RSP: 0018:ffffc9000c197840 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 1ffff92001832f09 RCX: 0000000000000001
RDX: 0000000000000001 RSI: ffffffff8727f520 RDI: ffffffff8746ebc0
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff1f561b6
R10: ffffffff8fab0db7 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff8903e4c0 R14: 0000000000000000 R15: 0000000000000000
 __fs_reclaim_acquire mm/page_alloc.c:3834 [inline]
 fs_reclaim_acquire+0x102/0x150 mm/page_alloc.c:3848
 might_alloc include/linux/sched/mm.h:318 [inline]
 slab_pre_alloc_hook mm/slub.c:4036 [inline]
 slab_alloc_node mm/slub.c:4114 [inline]
 __kmalloc_cache_noprof+0x51/0x2c0 mm/slub.c:4290
 kmalloc_noprof include/linux/slab.h:878 [inline]
 kzalloc_noprof include/linux/slab.h:1014 [inline]
 kernfs_fop_open+0x28b/0xdb0 fs/kernfs/file.c:623
 do_dentry_open+0x6cb/0x1390 fs/open.c:958
 vfs_open+0x82/0x3f0 fs/open.c:1088
 do_open fs/namei.c:3774 [inline]
 path_openat+0x1e6a/0x2d60 fs/namei.c:3933
 do_filp_open+0x1dc/0x430 fs/namei.c:3960
 do_sys_openat2+0x17a/0x1e0 fs/open.c:1415
 do_sys_open fs/open.c:1430 [inline]
 __do_sys_openat fs/open.c:1446 [inline]
 __se_sys_openat fs/open.c:1441 [inline]
 __x64_sys_openat+0x175/0x210 fs/open.c:1441
 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: 0033:0x7f813034e9a4
Code: 24 20 48 8d 44 24 30 48 89 44 24 28 64 8b 04 25 18 00 00 00 85 c0 75 2c 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 60 48 8b 15 55 a4 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffc64e30620 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000555ee53adfd0 RCX: 00007f813034e9a4
RDX: 0000000000080000 RSI: 00007ffc64e30738 RDI: 00000000ffffff9c
RBP: 00007ffc64e30738 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000080000
R13: 0000555ee53ae0c0 R14: 00007ffc64e30738 R15: 00007ffc64e32009
 </TASK>
, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
3 locks held by syz-executor/2642:
 #0: 
ffff88810df48ec8 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:704 [inline]
ffff88810df48ec8 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x13e/0x980 mm/memory.c:6232
 #1: ffff888113e5e4f0 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x177/0x380 mm/memory.c:3162
 #2: ffff888113ee2958 (jbd2_handle
){++++}-{0:0}, at: start_this_handle+0xf6c/0x1430 fs/jbd2/transaction.c:448
6 locks held by udevd/4897:
 #0: 
ffff88812de8bc38
 (kn->active
#17
){++++}-{0:0}
, at: kernfs_fop_open+0xa2/0xdb0 fs/kernfs/file.c:601
 #1: ffffffff8903e4c0 (fs_reclaim){+.+.}-{0:0}, at: might_alloc include/linux/sched/mm.h:318 [inline]
 #1: ffffffff8903e4c0 (fs_reclaim){+.+.}-{0:0}, at: slab_pre_alloc_hook mm/slub.c:4036 [inline]
 #1: ffffffff8903e4c0 (fs_reclaim){+.+.}-{0:0}, at: slab_alloc_node mm/slub.c:4114 [inline]
 #1: ffffffff8903e4c0 (fs_reclaim){+.+.}-{0:0}, at: __kmalloc_cache_noprof+0x51/0x2c0 mm/slub.c:4290
 #2: 
ffff888122964230 (&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]
 #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
5 locks held by kworker/0:8/6936:
 #0: ffff8881062b6d48
 (
(wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204
 #1: ffffc90011e77d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
 #2: 
ffff888109747190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
ffff888109747190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5849
 #3: ffff888119d93190 (&dev->mutex){....}-{3:3}
, at: device_lock include/linux/device.h:1014 [inline]
, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
 #4: ffff8881181e1160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
 #4: ffff8881181e1160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
6 locks held by kworker/0:3/10764:
 #0: ffff8881062b6d48
 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204
 #1: ffffc9000ff57d80 ((work_completion)(&hub->events)){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
 #2: ffff8881093af190
 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5849
 #3: ffff88811fb44190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
 #3: ffff88811fb44190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x10a/0x920 drivers/usb/core/hub.c:2295
 #4: ffff88812e38c160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
 #4: ffff88812e38c160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
 #4: ffff88812e38c160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1293
 #5: 
ffff888122969a20 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
ffff888122969a20 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
ffff888122969a20 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1293
1 lock held by syz.4.2719/14202:
 #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.2.2720/14204:
 #0: ffffffff88ec6a38 (
rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329
3 locks held by syz.3.2725/14217:
 #0: ffff888105f0b730 (&vma->vm_lock->lock){++++}-{3:3}
, at: vma_start_read include/linux/mm.h:704 [inline]
, at: lock_vma_under_rcu+0x13e/0x980 mm/memory.c:6232
 #1: ffff888113e5e4f0 (sb_pagefaults
){.+.+}-{0:0}, at: do_page_mkwrite+0x177/0x380 mm/memory.c:3162
 #2: 
ffff888113ee2958
 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xf6c/0x1430 fs/jbd2/transaction.c:448
4 locks held by syz-executor/14219:
 #0: ffff888113e5e3f8 (sb_writers#5){.+.+}-{0:0}, at: filename_create+0x10d/0x530 fs/namei.c:4019
 #1: ffff888113852b38 (&type->i_mutex_dir_key#3
/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:850 [inline]
/1){+.+.}-{3:3}, at: filename_create+0x1c2/0x530 fs/namei.c:4026
 #2: ffff888113ee2958
 (
jbd2_handle){++++}-{0:0}, at: start_this_handle+0xf6c/0x1430 fs/jbd2/transaction.c:448
 #3: ffff88811d1be2e8 (&ei->xattr_sem){++++}-{3:3}
, at: ext4_write_lock_xattr fs/ext4/xattr.h:154 [inline]
, at: ext4_xattr_set_handle+0x159/0x1420 fs/ext4/xattr.c:2373
2 locks held by syz-executor/14220:
 #0: ffff888113e5e3f8
 (sb_writers#5){.+.+}-{0:0}, at: filename_create+0x10d/0x530 fs/namei.c:4019
 #1: 
ffff888113852b38 (&type->i_mutex_dir_key#3/1
){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:850 [inline]
){+.+.}-{3:3}, at: filename_create+0x1c2/0x530 fs/namei.c:4026
2 locks held by syz-executor/14221:
 #0: ffff888113e5e3f8
 (
sb_writers#5){.+.+}-{0:0}, at: filename_create+0x10d/0x530 fs/namei.c:4019
 #1: ffff888113852b38 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:850 [inline]
 #1: ffff888113852b38 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x1c2/0x530 fs/namei.c:4026
2 locks held by syz-executor/14222:
 #0: ffff888113e5e3f8
 (sb_writers
#5
){.+.+}-{0:0}, at: filename_create+0x10d/0x530 fs/namei.c:4019
 #1: ffff888113852b38 (&type->i_mutex_dir_key#3/1
){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:850 [inline]
){+.+.}-{3:3}, at: filename_create+0x1c2/0x530 fs/namei.c:4026

=============================================

keytouch 0003:0926:3333.0177: can't resubmit intr, dummy_hcd.1-1/input0, status -19
keytouch 0003:0926:3333.0177: usb_submit_urb(ctrl) failed: -19