INFO: task udevd:4909 blocked for more than 143 seconds.
      Not tainted 6.11.0-rc1-syzkaller-00033-g25f51b76f90f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:23952 pid:4909  tgid:4909  ppid:2546   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0xcda/0x2f80 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6621
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
 device_lock include/linux/device.h:1009 [inline]
 uevent_show+0x188/0x3b0 drivers/base/core.c:2743
 dev_attr_show+0x53/0xe0 drivers/base/core.c:2437
 sysfs_kf_seq_show+0x23e/0x410 fs/sysfs/file.c:59
 seq_read_iter+0x4fa/0x12c0 fs/seq_file.c:230
 kernfs_fop_read_iter+0x41a/0x590 fs/kernfs/file.c:279
 new_sync_read fs/read_write.c:395 [inline]
 vfs_read+0x869/0xbd0 fs/read_write.c:476
 ksys_read+0x12f/0x260 fs/read_write.c:619
 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: 0033:0x7f934cdc7b6a
RSP: 002b:00007fffd239efa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055adf94806f0 RCX: 00007f934cdc7b6a
RDX: 0000000000001000 RSI: 000055adf94cb820 RDI: 0000000000000008
RBP: 000055adf94806f0 R08: 0000000000000008 R09: 0000000000000000
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000003fff R14: 00007fffd239f488 R15: 000000000000000a
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffffffff88cb68a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #0: ffffffff88cb68a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #0: ffffffff88cb68a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6620
2 locks held by kworker/u8:8/1326:
 #0: ffff888100089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
 #1: ffffc9000247fd80 (
(work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
2 locks held by getty/2604:
 #0: ffff88810e3e90a0 (&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+0xfc8/0x1490 drivers/tty/n_tty.c:2211
4 locks held by udevd/4909:
 #0: ffff888106fb32f0 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182
 #1: ffff888115e93088 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
 #2: ffff888117b1b008 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
 #3: ffff88812248e190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
 #3: ffff88812248e190 (&dev->mutex){....}-{3:3}, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2743
6 locks held by kworker/0:3/4923:
6 locks held by kworker/1:0/8724:
3 locks held by kworker/0:5/11515:
 #0: ffff8881052d1948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
 #1: ffffc90010bb7d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
 #2: ffff888108f84190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
 #2: ffff888108f84190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
3 locks held by kworker/1:7/12842:
1 lock held by modprobe/16387:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc1-syzkaller-00033-g25f51b76f90f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xf4e/0x1280 kernel/hung_task.c:379
 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
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 16388 Comm: modprobe Not tainted 6.11.0-rc1-syzkaller-00033-g25f51b76f90f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:220 [inline]
RIP: 0010:unwind_next_frame+0x2fa/0x23a0 arch/x86/kernel/unwind_orc.c:494
Code: 8a 4b 8d 14 76 4c 8d ac 12 20 25 87 8a 83 c0 01 49 81 fd 86 87 fd 8a 89 44 24 34 0f 83 08 0a 00 00 e8 7a 03 3e 00 8b 54 24 34 <48> 8d 14 52 48 8d 94 12 20 25 87 8a 48 81 fa 86 87 fd 8a 0f 87 e6
RSP: 0000:ffffc900105a7360 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffc900105a7438 RCX: ffffffff8115605d
RDX: 0000000000003ff0 RSI: ffffffff81156116 RDI: ffffffff8afdbf20
RBP: 0000000000000001 R08: 0000000000000004 R09: 0000000000000de5
R10: 0000000000062000 R11: 0000000000000000 R12: ffffffff810de5e1
R13: ffffffff8a88a4a2 R14: 0000000000003feb R15: ffffc900105a746d
FS:  00007fc009331380(0000) GS:ffff8881f6200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc00955c750 CR3: 000000012cfc4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __unwind_start+0x5aa/0x880 arch/x86/kernel/unwind_orc.c:760
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0xb2/0x170 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
 save_stack+0x162/0x1f0 mm/page_owner.c:156
 __set_page_owner+0x8b/0x560 mm/page_owner.c:320
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1493
 prep_new_page mm/page_alloc.c:1501 [inline]
 get_page_from_freelist+0x1311/0x25f0 mm/page_alloc.c:3442
 __alloc_pages_noprof+0x21e/0x2290 mm/page_alloc.c:4700
 alloc_pages_mpol_noprof+0xeb/0x400 mm/mempolicy.c:2263
 folio_alloc_mpol_noprof mm/mempolicy.c:2281 [inline]
 vma_alloc_folio_noprof+0xed/0x200 mm/mempolicy.c:2312
 folio_prealloc mm/memory.c:1062 [inline]
 wp_page_copy mm/memory.c:3335 [inline]
 do_wp_page+0x16ab/0x3270 mm/memory.c:3727
 handle_pte_fault mm/memory.c:5538 [inline]
 __handle_mm_fault+0xc56/0x24f0 mm/memory.c:5665
 handle_mm_fault+0x44e/0x7b0 mm/memory.c:5833
 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: 0033:0x7fc009646d4e
Code: 00 00 75 ce eb 27 41 8b 45 08 48 8b 95 78 ff ff ff 49 03 55 00 48 83 f8 26 75 19 48 8b 85 78 ff ff ff 49 03 45 10 49 83 c5 18 <48> 89 02 4c 39 eb 77 d4 eb 9e 48 83 f8 08 74 e1 48 8d 0d 6b a7 01
RSP: 002b:00007ffe80f4dd20 EFLAGS: 00010212
RAX: 00007fc0095613a0 RBX: 00007fc0093e5260 RCX: 00007ffe80f4ddb0
RDX: 00007fc00955c750 RSI: 00007fc0093e5a88 RDI: 00007fc0093e5f38
RBP: 00007ffe80f4de20 R08: 00007fc0093e5a88 R09: 0000000000000001
R10: 0000000053053053 R11: 0000000000000246 R12: 00007fc0096325c0
R13: 00007fc0093de270 R14: 0000000000000000 R15: 00007fc00966a2a0
 </TASK>