INFO: task udevd:5846 blocked for more than 143 seconds.
      Not tainted 6.12.0-rc7-syzkaller-01702-gd7ef9eeef072 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:22096 pid:5846  tgid:5846  ppid:1      flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5328 [inline]
 __schedule+0x184f/0x4c30 kernel/sched/core.c:6693
 __schedule_loop kernel/sched/core.c:6770 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6785
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615
 wait_for_reconnect drivers/block/nbd.c:1043 [inline]
 nbd_handle_cmd drivers/block/nbd.c:1085 [inline]
 nbd_queue_rq+0x7d9/0x2f30 drivers/block/nbd.c:1143
 blk_mq_dispatch_rq_list+0xb89/0x1b30 block/blk-mq.c:2030
 __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+0xb8a/0x1840 block/blk-mq-sched.c:309
 blk_mq_sched_dispatch_requests+0xcb/0x140 block/blk-mq-sched.c:331
 blk_mq_run_hw_queue+0x576/0xae0 block/blk-mq.c:2243
 blk_mq_flush_plug_list+0x1127/0x1890 block/blk-mq.c:2798
 __blk_flush_plug+0x420/0x500 block/blk-core.c:1199
 blk_finish_plug block/blk-core.c:1226 [inline]
 __submit_bio+0x422/0x560 block/blk-core.c:623
 __submit_bio_noacct_mq block/blk-core.c:696 [inline]
 submit_bio_noacct_nocheck+0x4d3/0xe30 block/blk-core.c:725
 submit_bh fs/buffer.c:2824 [inline]
 block_read_full_folio+0x93b/0xcd0 fs/buffer.c:2451
 filemap_read_folio+0x14b/0x630 mm/filemap.c:2367
 do_read_cache_folio+0x3f5/0x850 mm/filemap.c:3825
 read_mapping_folio include/linux/pagemap.h:1011 [inline]
 read_part_sector+0xb3/0x330 block/partitions/core.c:714
 adfspart_check_ICS+0xd9/0x9a0 block/partitions/acorn.c:360
 check_partition block/partitions/core.c:138 [inline]
 blk_add_partitions block/partitions/core.c:581 [inline]
 bdev_disk_changed+0x72c/0x13f0 block/partitions/core.c:685
 blkdev_get_whole+0x2d2/0x450 block/bdev.c:707
 bdev_open+0x2d4/0xc50 block/bdev.c:916
 blkdev_open+0x3d9/0x560 block/fops.c:631
 do_dentry_open+0x978/0x1460 fs/open.c:958
 vfs_open+0x3e/0x330 fs/open.c:1088
 do_open fs/namei.c:3774 [inline]
 path_openat+0x2c84/0x3590 fs/namei.c:3933
 do_filp_open+0x235/0x490 fs/namei.c:3960
 do_sys_openat2+0x13e/0x1d0 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+0x247/0x2a0 fs/open.c:1441
 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: 0033:0x7f325bb169a4
RSP: 002b:00007fff0ecfb490 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055b416f86860 RCX: 00007f325bb169a4
RDX: 00000000000a0800 RSI: 000055b416fad640 RDI: 00000000ffffff9c
RBP: 000055b416fad640 R08: 0000000000000001 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 000055b416f8d9e0 R14: 0000000000000001 R15: 000055b416f7c910
 </TASK>
INFO: task udevd:5861 blocked for more than 144 seconds.
      Not tainted 6.12.0-rc7-syzkaller-01702-gd7ef9eeef072 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:21392 pid:5861  tgid:5861  ppid:1      flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5328 [inline]
 __schedule+0x184f/0x4c30 kernel/sched/core.c:6693
 __schedule_loop kernel/sched/core.c:6770 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6785
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615
 wait_for_reconnect drivers/block/nbd.c:1043 [inline]
 nbd_handle_cmd drivers/block/nbd.c:1085 [inline]
 nbd_queue_rq+0x7d9/0x2f30 drivers/block/nbd.c:1143
 blk_mq_dispatch_rq_list+0xb89/0x1b30 block/blk-mq.c:2030
 __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+0xb8a/0x1840 block/blk-mq-sched.c:309
 blk_mq_sched_dispatch_requests+0xcb/0x140 block/blk-mq-sched.c:331
 blk_mq_run_hw_queue+0x576/0xae0 block/blk-mq.c:2243
 blk_mq_flush_plug_list+0x1127/0x1890 block/blk-mq.c:2798
 __blk_flush_plug+0x420/0x500 block/blk-core.c:1199
 blk_finish_plug block/blk-core.c:1226 [inline]
 __submit_bio+0x422/0x560 block/blk-core.c:623
 __submit_bio_noacct_mq block/blk-core.c:696 [inline]
 submit_bio_noacct_nocheck+0x4d3/0xe30 block/blk-core.c:725
 submit_bh fs/buffer.c:2824 [inline]
 block_read_full_folio+0x93b/0xcd0 fs/buffer.c:2451
 filemap_read_folio+0x14b/0x630 mm/filemap.c:2367
 do_read_cache_folio+0x3f5/0x850 mm/filemap.c:3825
 read_mapping_folio include/linux/pagemap.h:1011 [inline]
 read_part_sector+0xb3/0x330 block/partitions/core.c:714
 adfspart_check_ICS+0xd9/0x9a0 block/partitions/acorn.c:360
 check_partition block/partitions/core.c:138 [inline]
 blk_add_partitions block/partitions/core.c:581 [inline]
 bdev_disk_changed+0x72c/0x13f0 block/partitions/core.c:685
 blkdev_get_whole+0x2d2/0x450 block/bdev.c:707
 bdev_open+0x2d4/0xc50 block/bdev.c:916
 blkdev_open+0x3d9/0x560 block/fops.c:631
 do_dentry_open+0x978/0x1460 fs/open.c:958
 vfs_open+0x3e/0x330 fs/open.c:1088
 do_open fs/namei.c:3774 [inline]
 path_openat+0x2c84/0x3590 fs/namei.c:3933
 do_filp_open+0x235/0x490 fs/namei.c:3960
 do_sys_openat2+0x13e/0x1d0 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+0x247/0x2a0 fs/open.c:1441
 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: 0033:0x7f325bb169a4
RSP: 002b:00007fff0ecfb490 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055b416f9ce80 RCX: 00007f325bb169a4
RDX: 00000000000a0800 RSI: 000055b416f7d460 RDI: 00000000ffffff9c
RBP: 000055b416f7d460 R08: 0000000000000001 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 000055b416f87ce0 R14: 0000000000000001 R15: 000055b416f7c910
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/u8:0/11:
 #0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
 #0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: ffffc90000107d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc90000107d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffffffff8fcc88d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:586
1 lock held by khungtaskd/30:
 #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
3 locks held by kworker/u8:8/3435:
 #0: ffff88802fd16948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
 #0: ffff88802fd16948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: ffffc9000c157d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc9000c157d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffffffff8fcd5408 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4196
3 locks held by kworker/u8:10/3568:
 #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/0x1850 kernel/workqueue.c:3310
 #1: ffffc9000c6c7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc9000c6c7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffffffff8fcd5408 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276
2 locks held by getty/5601:
 #0: ffff888030b8a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002fc62f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
3 locks held by udevd/5846:
 #0: ffff8880254934c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xf0/0xc50 block/bdev.c:904
 #1: ffff888025358c90 (set->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
 #1: ffff888025358c90 (set->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
 #1: ffff888025358c90 (set->srcu){.+.+}-{0:0}, at: blk_mq_run_hw_queue+0x54d/0xae0 block/blk-mq.c:2243
 #2: ffff888025510180 (&cmd->lock){+.+.}-{3:3}, at: nbd_queue_rq+0xfe/0x2f30 drivers/block/nbd.c:1135
3 locks held by udevd/5861:
 #0: ffff888143f354c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xf0/0xc50 block/bdev.c:904
 #1: ffff888143b95d90 (set->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
 #1: ffff888143b95d90 (set->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
 #1: ffff888143b95d90 (set->srcu){.+.+}-{0:0}, at: blk_mq_run_hw_queue+0x54d/0xae0 block/blk-mq.c:2243
 #2: ffff8880254d8180 (&cmd->lock){+.+.}-{3:3}, at: nbd_queue_rq+0xfe/0x2f30 drivers/block/nbd.c:1135
3 locks held by kworker/0:6/5926:
 #0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
 #0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: ffffc90004327d00 (deferred_process_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc90004327d00 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffffffff8fcd5408 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
1 lock held by syz-executor/9470:
 #0: ffffffff8fcd5408 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline]
 #0: ffffffff8fcd5408 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3b/0x1b0 drivers/net/tun.c:3517
1 lock held by syz-executor/9513:
 #0: ffffffff8fcd5408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_net_lock include/linux/rtnetlink.h:128 [inline]
 #0: ffffffff8fcd5408 (rtnl_mutex){+.+.}-{3:3}, at: inet_rtm_newaddr+0x47e/0x1bd0 net/ipv4/devinet.c:987
2 locks held by syz.3.1165/9707:
 #0: ffff8880294c86c8 (nlk_cb_mutex-ROUTE){+.+.}-{3:3}, at: __netlink_dump_start+0x119/0x790 net/netlink/af_netlink.c:2390
 #1: ffffffff8fcd5408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #1: ffffffff8fcd5408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_dumpit+0x99/0x200 net/core/rtnetlink.c:6779
1 lock held by syz.3.1165/9710:
 #0: ffffffff8fcd5408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd5408 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6917
3 locks held by syz.0.1164/9709:
 #0: ffffffff8fd3bf90 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
 #1: ffffffff8fd3be48 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:35 [inline]
 #1: ffffffff8fd3be48 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:60 [inline]
 #1: ffffffff8fd3be48 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xec0 net/netlink/genetlink.c:1209
 #2: ffffffff8fcd5408 (rtnl_mutex){+.+.}-{3:3}, at: wg_set_device+0x102/0x2160 drivers/net/wireguard/netlink.c:504
2 locks held by syz.0.1164/9712:
 #0: ffffffff8fd3bf90 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
 #1: ffffffff8fcd5408 (rtnl_mutex){+.+.}-{3:3}, at: nl80211_pre_doit+0x5f/0x8b0 net/wireless/nl80211.c:16587
2 locks held by syz.0.1164/9713:
 #0: ffffffff8fd3bf90 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
 #1: ffffffff8fd3be48 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:35 [inline]
 #1: ffffffff8fd3be48 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:60 [inline]
 #1: ffffffff8fd3be48 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xec0 net/netlink/genetlink.c:1209

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc7-syzkaller-01702-gd7ef9eeef072 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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:223 [inline]
 watchdog+0xff4/0x1040 kernel/hung_task.c:379
 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5200 Comm: syslogd Not tainted 6.12.0-rc7-syzkaller-01702-gd7ef9eeef072 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:__asan_memset+0x5/0x50 mm/kasan/shadow.c:83
Code: 01 00 00 00 e9 3c e6 ff ff 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <41> 56 53 48 89 d3 41 89 f6 48 89 fd 48 8b 4c 24 18 48 89 d6 ba 01
RSP: 0018:ffffc900035ff270 EFLAGS: 00000046
RAX: 1ffff110069c35c3 RBX: ffff888034e1ae18 RCX: ffff888079eb5a00
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc900035ff2e0
RBP: ffffc900035ff370 R08: ffffffff901d73ef R09: 1ffffffff203ae7d
R10: dffffc0000000000 R11: fffffbfff203ae7e R12: ffffc90003b81000
R13: ffff888034e1ae00 R14: dffffc0000000000 R15: 1ffff920006bfe58
FS:  00007f6bb4559380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdd41399fb8 CR3: 0000000033426000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __bpf_trace_run kernel/trace/bpf_trace.c:2304 [inline]
 bpf_trace_run1+0xdf/0x520 kernel/trace/bpf_trace.c:2356
 trace_rcu_utilization+0x1b4/0x1e0 include/trace/events/rcu.h:27
 rcu_note_context_switch+0xca/0xff0 kernel/rcu/tree_plugin.h:329
 __schedule+0x34b/0x4c30 kernel/sched/core.c:6573
 __schedule_loop kernel/sched/core.c:6770 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6785
 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2591
 __skb_wait_for_more_packets+0x399/0x600 net/core/datagram.c:121
 __unix_dgram_recvmsg+0x34a/0x12f0 net/unix/af_unix.c:2448
 sock_recvmsg_nosec net/socket.c:1051 [inline]
 sock_recvmsg+0x22f/0x280 net/socket.c:1073
 sock_read_iter+0x2c4/0x3d0 net/socket.c:1143
 new_sync_read fs/read_write.c:488 [inline]
 vfs_read+0x991/0xb70 fs/read_write.c:569
 ksys_read+0x183/0x2b0 fs/read_write.c:712
 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: 0033:0x7f6bb46adb6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff30aec6c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f6bb46adb6a
RDX: 00000000000000ff RSI: 00005647d1159950 RDI: 0000000000000000
RBP: 00005647d1159910 R08: 0000000000000001 R09: 0000000000000000
R10: 00007f6bb484c3a3 R11: 0000000000000246 R12: 00005647d115999c
R13: 00005647d1159950 R14: 0000000000000000 R15: 00007f6bb4890a80
 </TASK>