INFO: task khugepaged:37 blocked for more than 143 seconds.
      Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:khugepaged      state:D stack:28160 pid:37    tgid:37    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0xe37/0x5490 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6621
 schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2557
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common+0x3de/0x5f0 kernel/sched/completion.c:116
 __flush_work+0x776/0xc30 kernel/workqueue.c:4216
 __lru_add_drain_all+0x52c/0x740 mm/swap.c:920
 khugepaged_do_scan mm/khugepaged.c:2501 [inline]
 khugepaged+0x108/0x15e0 mm/khugepaged.c:2570
 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>

Showing all locks held in the system:
2 locks held by kworker/0:0/8:
3 locks held by kworker/0:1/9:
1 lock held by khungtaskd/30:
 #0: ffffffff8ddba6a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #0: ffffffff8ddba6a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #0: ffffffff8ddba6a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6626
1 lock held by khugepaged/37:
 #0: ffffffff8dedde88 (lock#3){+.+.}-{3:3}, at: __lru_add_drain_all+0x69/0x740 mm/swap.c:875
3 locks held by kworker/u8:3/52:
4 locks held by kworker/u8:7/2507:
 #0: ffff88801bae3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
 #1: ffffc900090b7d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
 #2: ffffffff8fab4590 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xb40 net/core/net_namespace.c:580
 #3: ffff88809dfc9428 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_destruct+0x151/0x3d0 drivers/net/wireguard/device.c:249
2 locks held by getty/4976:
 #0: ffff88803505a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
2 locks held by kworker/0:5/5292:
5 locks held by kworker/0:3/8030:
7 locks held by syz.1.1975/13574:
6 locks held by syz-executor/13608:
 #0: ffff88802fc9c420 (sb_writers#9){.+.+}-{0:0}, at: ksys_write+0x12f/0x260 fs/read_write.c:736
 #1: ffff888090172088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
 #2: ffff88802783bc38 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326
 #3: ffffffff8f064fc8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
 #4: ffff88802928d0e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
 #4: ffff88802928d0e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1094 [inline]
 #4: ffff88802928d0e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1292
 #5: ffff88802928b250 (&devlink->lock_key#58){+.+.}-{3:3}, at: nsim_drv_remove+0x4a/0x1d0 drivers/net/netdevsim/dev.c:1672
4 locks held by syz-executor/13625:
 #0: ffff88802fc9c420 (sb_writers#9){.+.+}-{0:0}, at: ksys_write+0x12f/0x260 fs/read_write.c:736
 #1: ffff88809dadd088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
 #2: ffff88802783bc38 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326
 #3: ffffffff8f064fc8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/13627:
 #0: ffff88802fc9c420 (sb_writers#9){.+.+}-{0:0}, at: ksys_write+0x12f/0x260 fs/read_write.c:736
 #1: ffff88805c2db888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
 #2: ffff88802783bc38 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326
 #3: ffffffff8f064fc8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/13631:
 #0: ffff88802fc9c420 (sb_writers#9){.+.+}-{0:0}, at: ksys_write+0x12f/0x260 fs/read_write.c:736
 #1: ffff88802a8ec088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
 #2: ffff88802783bc38 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326
 #3: ffffffff8f064fc8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
1 lock held by syz-executor/13650:
 #0: ffffffff8ddc5e38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:296
1 lock held by syz-executor/13662:
 #0: ffffffff8ddc5e38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:328
1 lock held by syz-executor/13677:
 #0: ffffffff8fab4590 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x292/0x6b0 net/core/net_namespace.c:490

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
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+0xf0c/0x1240 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: 13574 Comm: syz.1.1975 Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:deref_stack_reg arch/x86/kernel/unwind_orc.c:403 [inline]
RIP: 0010:unwind_next_frame+0xd96/0x23a0 arch/x86/kernel/unwind_orc.c:585
Code: ff ff e8 6d cc 4e 00 e8 88 94 c3 ff e9 cd f6 ff ff e8 5e cc 4e 00 49 8d 45 f8 ba 08 00 00 00 48 89 df 48 89 c6 48 89 44 24 28 <e8> e5 ef ff ff 31 ff 41 89 c7 89 c6 e8 19 ce 4e 00 48 8d 4b 34 45
RSP: 0018:ffffc90000007510 EFLAGS: 00000046
RAX: ffffc90000007b48 RBX: ffffc90000007590 RCX: ffffffff813d0689
RDX: 0000000000000008 RSI: ffffc90000007b48 RDI: ffffc90000007590
RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000004
R10: 0000000000000002 R11: 0000000000000000 R12: ffffffff91141bd2
R13: ffffc90000007b50 R14: ffffffff91141bd6 R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f15154656c0 CR3: 0000000024842000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 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
 poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387
 kmalloc_noprof include/linux/slab.h:690 [inline]
 dummy_urb_enqueue+0x8d/0x8a0 drivers/usb/gadget/udc/dummy_hcd.c:1271
 usb_hcd_submit_urb+0x2d1/0x2090 drivers/usb/core/hcd.c:1533
 usb_submit_urb+0x87c/0x1730 drivers/usb/core/urb.c:581
 ath9k_hif_usb_reg_in_cb+0x500/0x720 drivers/net/wireless/ath/ath9k/hif_usb.c:790
 __usb_hcd_giveback_urb+0x466/0x6e0 drivers/usb/core/hcd.c:1650
 usb_hcd_giveback_urb+0x396/0x450 drivers/usb/core/hcd.c:1734
 dummy_timer+0x17c3/0x38d0 drivers/usb/gadget/udc/dummy_hcd.c:1987
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x450 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__schedule+0xe3f/0x5490 kernel/sched/core.c:6399
Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 ba 3f 00 00 48 8b bd 10 ff ff ff 4d 89 77 10 4c 89 f6 e8 79 2b e7 f5 48 89 c7 e8 71 4b 43 f6 <48> 8b 8d a0 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 01 c1 48 c7
RSP: 0018:ffffc9000b3ff428 EFLAGS: 00000202
RAX: 000000000003cc8f RBX: ffff88806e318000 RCX: 1ffffffff2d3c7f8
RDX: 0000000000000000 RSI: ffffffff8b4cdac0 RDI: ffffffff8bb118a0
RBP: ffffc9000b3ff5b8 R08: 0000000000000001 R09: fffffbfff2d39ae7
R10: ffffffff969cd73f R11: 0000000000000000 R12: ffff8880b883f688
R13: 0000000000000000 R14: ffff88806e318000 R15: ffff8880b883eb80
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:6851
 irqentry_exit+0x36/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:native_pmd_val arch/x86/include/asm/pgtable_types.h:401 [inline]
RIP: 0010:pmd_none arch/x86/include/asm/pgtable.h:1014 [inline]
RIP: 0010:is_swap_pmd include/linux/huge_mm.h:365 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1713 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1765 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1786 [inline]
RIP: 0010:unmap_page_range+0x5eb/0x3d30 mm/memory.c:1807
Code: df 48 89 ee e8 a6 2f b9 ff 48 39 eb 4c 0f 43 74 24 30 4c 89 74 24 20 e8 e3 2d b9 ff 48 8b 44 24 10 48 c1 e8 03 42 80 3c 28 00 <0f> 85 14 2d 00 00 48 8b 44 24 10 31 ff 4c 8b 20 4c 89 e3 48 83 e3
RSP: 0018:ffffc9000b3ff698 EFLAGS: 00000246
RAX: 1ffff110135e8f05 RBX: 0000000020bfffff RCX: ffffffff81d2aaea
RDX: ffff88806e318000 RSI: ffffffff81d2aafd RDI: 0000000000000006
RBP: 0000000020b35fff R08: 0000000000000006 R09: 0000000020bfffff
R10: 0000000020b35fff R11: 1ffffffff1bb8af1 R12: fffffffffffffffc
R13: dffffc0000000000 R14: 0000000020b36000 R15: 0000000020a4d000
 unmap_single_vma+0x194/0x2b0 mm/memory.c:1853
 unmap_vmas+0x22f/0x490 mm/memory.c:1897
 exit_mmap+0x1b8/0xb20 mm/mmap.c:3412
 __mmput+0x12a/0x480 kernel/fork.c:1345
 mmput+0x62/0x70 kernel/fork.c:1367
 exit_mm kernel/exit.c:571 [inline]
 do_exit+0x9bf/0x2bb0 kernel/exit.c:869
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1031
 get_signal+0x25fb/0x2770 kernel/signal.c:2917
 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
 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+0x150/0x2a0 kernel/entry/common.c:218
 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f151477dfb7
Code: Unable to access opcode bytes at 0x7f151477df8d.
RSP: 002b:00007fffdcce6b48 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: 0000000000000000 RBX: 00007f15154df6c0 RCX: 00007f151477dfb7
RDX: 0000000000000003 RSI: 0000000000020000 RDI: 00007f15154c0000
RBP: 0000000000000000 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000021000 R11: 0000000000000206 R12: 00007fffdcce6ca0
R13: ffffffffffffffc0 R14: 0000000000001000 R15: 0000000000000000
 </TASK>