INFO: task syz.1.868:9269 blocked for more than 143 seconds.
      Not tainted 6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.868       state:D stack:27328 pid:9269  tgid:9266  ppid:5834   flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x1850/0x4c30 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6848
 __lock_sock+0x1cd/0x330 net/core/sock.c:3079
 lock_sock_nested+0x9e/0x100 net/core/sock.c:3647
 lock_sock include/net/sock.h:1618 [inline]
 sockopt_lock_sock net/core/sock.c:1133 [inline]
 sk_setsockopt+0xebc/0x3290 net/core/sock.c:1290
 do_sock_setsockopt+0x2fb/0x720 net/socket.c:2320
 __sys_setsockopt net/socket.c:2349 [inline]
 __do_sys_setsockopt net/socket.c:2355 [inline]
 __se_sys_setsockopt net/socket.c:2352 [inline]
 __x64_sys_setsockopt+0x1ee/0x280 net/socket.c:2352
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd890185d29
RSP: 002b:00007fd890ef6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fd890375fa0 RCX: 00007fd890185d29
RDX: 0000000000000007 RSI: 0000000000000001 RDI: 0000000000000005
RBP: 00007fd890201b08 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd890375fa0 R15: 00007ffc3d14e788
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/u8:0/11:
1 lock held by khungtaskd/30:
 #0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
3 locks held by kworker/u8:6/2114:
 #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
 #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
 #1: ffffc90004b5fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc90004b5fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
 #2: ffffffff8fcb3988 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:281
2 locks held by getty/5587:
 #0: ffff88814d5170a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
3 locks held by syz-executor/5833:
 #0: ffff888069a9cd80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close net/bluetooth/hci_core.c:480 [inline]
 #0: ffff888069a9cd80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2697
 #1: ffff888069a9c078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x5c8/0x11c0 net/bluetooth/hci_sync.c:5200
 #2: ffffffff8e93cff8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
 #2: ffffffff8e93cff8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976
2 locks held by kworker/u8:10/7013:
2 locks held by kworker/u8:21/7375:
1 lock held by syz.1.868/9269:
 #0: ffff888028e98258 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1618 [inline]
 #0: ffff888028e98258 (sk_lock-AF_INET6){+.+.}-{0:0}, at: sockopt_lock_sock net/core/sock.c:1133 [inline]
 #0: ffff888028e98258 (sk_lock-AF_INET6){+.+.}-{0:0}, at: sk_setsockopt+0xebc/0x3290 net/core/sock.c:1290
1 lock held by syz.1.868/9270:
1 lock held by syz-executor/11072:
2 locks held by syz-executor/11127:
 #0: ffff888069648d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close net/bluetooth/hci_core.c:480 [inline]
 #0: ffff888069648d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2697
 #1: ffff888069648078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x5c8/0x11c0 net/bluetooth/hci_sync.c:5200

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
 watchdog+0xff6/0x1040 kernel/hung_task.c:397
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 1 Comm: init Not tainted 6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__ClearPageBuddy include/linux/page-flags.h:1019 [inline]
RIP: 0010:__del_page_from_free_list+0x221/0x470 mm/page_alloc.c:703
Code: 85 e6 00 00 00 8b 45 00 83 f8 ff 74 24 25 00 00 00 ff 3d 00 00 00 f0 0f 85 f0 01 00 00 42 0f b6 04 3b 84 c0 0f 85 de 00 00 00 <c7> 45 00 ff ff ff ff 49 83 c5 28 4c 89 e8 48 c1 e8 03 42 80 3c 38
RSP: 0018:ffffc900000677b8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 1ffffd40002af586 RCX: 0000000000000000
RDX: ffffea000157ac08 RSI: ffff88813fffbc80 RDI: ffffea000157ac10
RBP: ffffea000157ac30 R08: ffffea000157ac37 R09: 1ffffd40002af586
R10: dffffc0000000000 R11: fffff940002af587 R12: ffffea0001837e88
R13: ffffea000157ac00 R14: ffff88813fffbe68 R15: dffffc0000000000
FS:  00007f964eaa4380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f83386a7d60 CR3: 0000000033c24000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __free_one_page+0x372/0x9c0 mm/page_alloc.c:825
 free_pcppages_bulk+0x3c7/0x5e0 mm/page_alloc.c:1220
 free_unref_page_commit+0x582/0x1140 mm/page_alloc.c:2632
 free_unref_page+0x711/0x1010 mm/page_alloc.c:2680
 discard_slab mm/slub.c:2688 [inline]
 __put_partials+0x160/0x1c0 mm/slub.c:3157
 put_cpu_partial+0x17c/0x250 mm/slub.c:3232
 __slab_free+0x290/0x380 mm/slub.c:4483
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4119 [inline]
 slab_alloc_node mm/slub.c:4168 [inline]
 kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4175
 getname_flags+0xb7/0x540 fs/namei.c:139
 user_path_at+0x24/0x60 fs/namei.c:3069
 do_faccessat+0x5e2/0xb80 fs/open.c:485
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f964ebf8c91
Code: 28 c3 c3 b8 08 00 00 00 0f 05 48 3d 00 f0 ff ff 76 10 48 8b 15 88 a1 0d 00 f7 d8 64 89 02 48 83 c8 ff c3 b8 15 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 10 48 8b 15 68 a1 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffeef6181d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00000000000016c4 RCX: 00007f964ebf8c91
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 00007f964ed9ff4d
RBP: 00007f964ed9ff4d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 00000000000016c4
 </TASK>