INFO: task udevd:5807 blocked for more than 144 seconds.
      Not tainted 6.13.0-rc7-syzkaller-00019-gc45323b7560e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:24464 pid:5807  tgid:5807  ppid:5191   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6848
 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
 wait_for_reconnect drivers/block/nbd.c:1043 [inline]
 nbd_handle_cmd drivers/block/nbd.c:1085 [inline]
 nbd_queue_rq+0xcbc/0x1220 drivers/block/nbd.c:1143
 blk_mq_dispatch_rq_list+0x443/0x1dc0 block/blk-mq.c:2118
 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:170 [inline]
 blk_mq_do_dispatch_sched block/blk-mq-sched.c:184 [inline]
 __blk_mq_sched_dispatch_requests+0xcdf/0x1620 block/blk-mq-sched.c:309
 blk_mq_sched_dispatch_requests+0xd8/0x1b0 block/blk-mq-sched.c:331
 blk_mq_run_hw_queue+0x239/0x670 block/blk-mq.c:2352
 blk_mq_dispatch_plug_list block/blk-mq.c:2862 [inline]
 blk_mq_flush_plug_list+0x673/0x1c60 block/blk-mq.c:2913
 __blk_flush_plug+0x2c5/0x4b0 block/blk-core.c:1213
 blk_finish_plug block/blk-core.c:1240 [inline]
 blk_finish_plug block/blk-core.c:1237 [inline]
 __submit_bio+0x439/0x540 block/blk-core.c:637
 __submit_bio_noacct_mq block/blk-core.c:710 [inline]
 submit_bio_noacct_nocheck+0x698/0xd70 block/blk-core.c:739
 submit_bio_noacct+0x93a/0x1e20 block/blk-core.c:868
 submit_bh fs/buffer.c:2819 [inline]
 block_read_full_folio+0x812/0xa50 fs/buffer.c:2446
 filemap_read_folio+0xc6/0x2a0 mm/filemap.c:2357
 do_read_cache_folio+0x263/0x5c0 mm/filemap.c:3817
 read_mapping_folio include/linux/pagemap.h:1011 [inline]
 read_part_sector+0xd4/0x310 block/partitions/core.c:722
 adfspart_check_ICS+0x94/0x940 block/partitions/acorn.c:360
 check_partition block/partitions/core.c:141 [inline]
 blk_add_partitions block/partitions/core.c:589 [inline]
 bdev_disk_changed+0x71f/0x1520 block/partitions/core.c:693
 blkdev_get_whole+0x187/0x290 block/bdev.c:706
 bdev_open+0x2c7/0xe20 block/bdev.c:915
 blkdev_open+0x329/0x400 block/fops.c:627
 do_dentry_open+0xf59/0x1ea0 fs/open.c:945
 vfs_open+0x82/0x3f0 fs/open.c:1075
 do_open fs/namei.c:3828 [inline]
 path_openat+0x1e6a/0x2d60 fs/namei.c:3987
 do_filp_open+0x20c/0x470 fs/namei.c:4014
 do_sys_openat2+0x17a/0x1e0 fs/open.c:1402
 do_sys_open fs/open.c:1417 [inline]
 __do_sys_openat fs/open.c:1433 [inline]
 __se_sys_openat fs/open.c:1428 [inline]
 __x64_sys_openat+0x175/0x210 fs/open.c:1428
 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: 0033:0x7f277fb149a4
RSP: 002b:00007ffc963d30e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000558baf364200 RCX: 00007f277fb149a4
RDX: 00000000000a0800 RSI: 0000558baf337350 RDI: 00000000ffffff9c
RBP: 0000558baf337350 R08: 0000000000000001 R09: 00007f277ff31000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 0000558baf360890 R14: 0000000000000001 R15: 0000558baf32b2c0
 </TASK>
INFO: task udevd:5832 blocked for more than 144 seconds.
      Not tainted 6.13.0-rc7-syzkaller-00019-gc45323b7560e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:24208 pid:5832  tgid:5832  ppid:5191   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6848
 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
 wait_for_reconnect drivers/block/nbd.c:1043 [inline]
 nbd_handle_cmd drivers/block/nbd.c:1085 [inline]
 nbd_queue_rq+0xcbc/0x1220 drivers/block/nbd.c:1143
 blk_mq_dispatch_rq_list+0x443/0x1dc0 block/blk-mq.c:2118
 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:170 [inline]
 blk_mq_do_dispatch_sched block/blk-mq-sched.c:184 [inline]
 __blk_mq_sched_dispatch_requests+0xcdf/0x1620 block/blk-mq-sched.c:309
 blk_mq_sched_dispatch_requests+0xd8/0x1b0 block/blk-mq-sched.c:331
 blk_mq_run_hw_queue+0x239/0x670 block/blk-mq.c:2352
 blk_mq_dispatch_plug_list block/blk-mq.c:2862 [inline]
 blk_mq_flush_plug_list+0x673/0x1c60 block/blk-mq.c:2913
 __blk_flush_plug+0x2c5/0x4b0 block/blk-core.c:1213
 blk_finish_plug block/blk-core.c:1240 [inline]
 blk_finish_plug block/blk-core.c:1237 [inline]
 __submit_bio+0x439/0x540 block/blk-core.c:637
 __submit_bio_noacct_mq block/blk-core.c:710 [inline]
 submit_bio_noacct_nocheck+0x698/0xd70 block/blk-core.c:739
 submit_bio_noacct+0x93a/0x1e20 block/blk-core.c:868
 submit_bh fs/buffer.c:2819 [inline]
 block_read_full_folio+0x812/0xa50 fs/buffer.c:2446
 filemap_read_folio+0xc6/0x2a0 mm/filemap.c:2357
 do_read_cache_folio+0x263/0x5c0 mm/filemap.c:3817
 read_mapping_folio include/linux/pagemap.h:1011 [inline]
 read_part_sector+0xd4/0x310 block/partitions/core.c:722
 adfspart_check_ICS+0x94/0x940 block/partitions/acorn.c:360
 check_partition block/partitions/core.c:141 [inline]
 blk_add_partitions block/partitions/core.c:589 [inline]
 bdev_disk_changed+0x71f/0x1520 block/partitions/core.c:693
 blkdev_get_whole+0x187/0x290 block/bdev.c:706
 bdev_open+0x2c7/0xe20 block/bdev.c:915
 blkdev_open+0x329/0x400 block/fops.c:627
 do_dentry_open+0xf59/0x1ea0 fs/open.c:945
 vfs_open+0x82/0x3f0 fs/open.c:1075
 do_open fs/namei.c:3828 [inline]
 path_openat+0x1e6a/0x2d60 fs/namei.c:3987
 do_filp_open+0x20c/0x470 fs/namei.c:4014
 do_sys_openat2+0x17a/0x1e0 fs/open.c:1402
 do_sys_open fs/open.c:1417 [inline]
 __do_sys_openat fs/open.c:1433 [inline]
 __se_sys_openat fs/open.c:1428 [inline]
 __x64_sys_openat+0x175/0x210 fs/open.c:1428
 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: 0033:0x7f277fb149a4
RSP: 002b:00007ffc963d30e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000558baf36bff0 RCX: 00007f277fb149a4
RDX: 00000000000a0800 RSI: 0000558baf362e40 RDI: 00000000ffffff9c
RBP: 0000558baf362e40 R08: 0000000000000001 R09: 00007f277ff31000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 0000558baf36ccd0 R14: 0000000000000001 R15: 0000558baf32b2c0
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_exp_gp_kthr/19:
1 lock held by khungtaskd/30:
 #0: ffffffff8e1bb900 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8e1bb900 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8e1bb900 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6744
2 locks held by kworker/u8:2/35:
 #0: ffff8881476a3948 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3211
 #1: ffffc90000ab7d80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3212
2 locks held by getty/5569:
 #0: ffff8880370f20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
3 locks held by udevd/5806:
 #0: ffff8880260674c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x41a/0xe20 block/bdev.c:903
 #1: ffff888143397f90 (set->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:158 [inline]
 #1: ffff888143397f90 (set->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:249 [inline]
 #1: ffff888143397f90 (set->srcu){.+.+}-{0:0}, at: blk_mq_run_hw_queue+0x22b/0x670 block/blk-mq.c:2352
 #2: ffff888026137178 (&cmd->lock){+.+.}-{4:4}, at: nbd_queue_rq+0xbe/0x1220 drivers/block/nbd.c:1135
3 locks held by udevd/5807:
 #0: ffff8880260634c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x41a/0xe20 block/bdev.c:903
 #1: ffff888143397a10 (set->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:158 [inline]
 #1: ffff888143397a10 (set->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:249 [inline]
 #1: ffff888143397a10 (set->srcu){.+.+}-{0:0}, at: blk_mq_run_hw_queue+0x22b/0x670 block/blk-mq.c:2352
 #2: ffff888026100178 (&cmd->lock){+.+.}-{4:4}, at: nbd_queue_rq+0xbe/0x1220 drivers/block/nbd.c:1135
2 locks held by syz-executor/5815:
 #0: ffff88802c0fcd80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:480
 #1: ffff88802c0fc078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x3ab/0x11a0 net/bluetooth/hci_sync.c:5201
2 locks held by syz-executor/5825:
 #0: ffff88802c0f8d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:480
 #1: ffff88802c0f8078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x3ab/0x11a0 net/bluetooth/hci_sync.c:5201
3 locks held by udevd/5832:
 #0: ffff888143b7f4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x41a/0xe20 block/bdev.c:903
 #1: ffff8881437f5e90 (set->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:158 [inline]
 #1: ffff8881437f5e90 (set->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:249 [inline]
 #1: ffff8881437f5e90 (set->srcu){.+.+}-{0:0}, at: blk_mq_run_hw_queue+0x22b/0x670 block/blk-mq.c:2352
 #2: ffff8880260d0178 (&cmd->lock){+.+.}-{4:4}, at: nbd_queue_rq+0xbe/0x1220 drivers/block/nbd.c:1135
3 locks held by udevd/5943:
 #0: ffff8880260234c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x41a/0xe20 block/bdev.c:903
 #1: ffff888024c59310 (set->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:158 [inline]
 #1: ffff888024c59310 (set->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:249 [inline]
 #1: ffff888024c59310 (set->srcu){.+.+}-{0:0}, at: blk_mq_run_hw_queue+0x22b/0x670 block/blk-mq.c:2352
 #2: ffff8880261d7178 (&cmd->lock){+.+.}-{4:4}, at: nbd_queue_rq+0xbe/0x1220 drivers/block/nbd.c:1135
2 locks held by syz-executor/9425:
 #0: ffff888030ae8d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:480
 #1: ffff888030ae8078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x3ab/0x11a0 net/bluetooth/hci_sync.c:5201
2 locks held by syz.3.845/9456:
 #0: ffffffff8fedd408 (rtnl_mutex){+.+.}-{4:4}, at: tun_detach drivers/net/tun.c:698 [inline]
 #0: ffffffff8fedd408 (rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x38/0x230 drivers/net/tun.c:3517
 #1: ffffffff8e1c7238 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:297
1 lock held by syz.4.847/9460:
 #0: ffffffff8fec7810 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x292/0x6c0 net/core/net_namespace.c:512

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc7-syzkaller-00019-gc45323b7560e #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+0x116/0x1f0 lib/dump_stack.c:120
 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:234 [inline]
 watchdog+0xf14/0x1240 kernel/hung_task.c:397
 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 7261 Comm: kworker/u8:13 Not tainted 6.13.0-rc7-syzkaller-00019-gc45323b7560e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: wg-kex-wg1 wg_packet_handshake_send_worker
RIP: 0010:preempt_count_add+0x1f/0x150 kernel/sched/core.c:5851
Code: 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 c7 c0 a0 e8 84 9a 55 48 ba 00 00 00 00 00 fc ff df 48 89 c1 53 83 e0 07 89 fb <48> c1 e9 03 83 c0 03 65 01 3d 1b 59 9b 7e 0f b6 14 11 38 d0 7c 08
RSP: 0018:ffffc90002f275d0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff9a84e8a0
RDX: dffffc0000000000 RSI: ffffffff8635f317 RDI: 0000000000000001
RBP: ffffc90002f276a0 R08: ffffc90002f2768c R09: ffffffff914ce676
R10: ffffc90002f27658 R11: 00000000000536cc R12: ffffffff8185e450
R13: ffffc90002f27658 R14: 0000000000000000 R15: ffff888061b64880
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020027000 CR3: 00000000540b8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 unwind_next_frame+0xb1/0x20c0 arch/x86/kernel/unwind_orc.c:479
 arch_stack_walk+0x95/0x100 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
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
 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_node_noprof+0x223/0x3c0 mm/slub.c:4220
 __alloc_skb+0x2b1/0x380 net/core/skbuff.c:668
 alloc_skb include/linux/skbuff.h:1323 [inline]
 wg_socket_send_buffer_to_peer+0x38/0x1a0 drivers/net/wireguard/socket.c:192
 wg_packet_send_handshake_initiation+0x227/0x360 drivers/net/wireguard/send.c:40
 wg_packet_handshake_send_worker+0x1c/0x30 drivers/net/wireguard/send.c:51
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 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>