INFO: task syz.4.30:5964 blocked for more than 144 seconds.
      Not tainted 6.12.0-rc2-next-20241010-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.30        state:D stack:25072 pid:5964  tgid:5925  ppid:5629   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 xfs_ail_push_all_sync+0x236/0x310 fs/xfs/xfs_trans_ail.c:726
 xfs_log_quiesce+0xdf/0x5b0 fs/xfs/xfs_log.c:1018
 xfs_fs_freeze+0x8d/0x1a0 fs/xfs/xfs_super.c:936
 freeze_super+0x81b/0xee0 fs/super.c:2107
 fs_bdev_freeze+0x1ac/0x320 fs/super.c:1484
 bdev_freeze+0xd6/0x220 block/bdev.c:257
 xfs_fs_goingdown+0xa9/0x160 fs/xfs/xfs_fsops.c:446
 xfs_file_ioctl+0x12e5/0x1a30 fs/xfs/xfs_ioctl.c:1343
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
 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: 0033:0x7f84ead7dff9
RSP: 002b:00007f84ea7de038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f84eaf36058 RCX: 00007f84ead7dff9
RDX: 0000000020000080 RSI: 000000008004587d RDI: 0000000000000006
RBP: 00007f84eadf0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f84eaf36058 R15: 00007ffd819de9e8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffffffff8e939e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8e939e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8e939e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by getty/4992:
 #0: ffff88802e9610a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
3 locks held by kworker/0:4/5285:
 #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: ffffc90003ee7d00 (deferred_process_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc90003ee7d00 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffffffff8fcd9ac8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
3 locks held by kworker/u8:8/5332:
 #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: ffffc900040c7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc900040c7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffffffff8fcd9ac8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276
5 locks held by kworker/u8:16/5397:
 #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: ffffc9000374fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc9000374fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffffffff8fcccfd0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:587
 #3: ffffffff8fcd9ac8 (rtnl_mutex){+.+.}-{3:3}, at: cleanup_net+0x6af/0xcc0 net/core/net_namespace.c:623
 #4: ffffffff8e93f3b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
 #4: ffffffff8e93f3b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976
5 locks held by syz.4.30/5964:
 #0: ffff888148c846b0 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: bdev_freeze+0x2a/0x220 block/bdev.c:248
 #1: ffff88807fa1e420 (sb_writers#23){++++}-{0:0}, at: sb_wait_write fs/super.c:1896 [inline]
 #1: ffff88807fa1e420 (sb_writers#23){++++}-{0:0}, at: freeze_super+0x4e9/0xee0 fs/super.c:2085
 #2: ffff88807fa1e0e0 (&type->s_umount_key#72){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
 #2: ffff88807fa1e0e0 (&type->s_umount_key#72){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
 #2: ffff88807fa1e0e0 (&type->s_umount_key#72){++++}-{3:3}, at: freeze_super+0x4f1/0xee0 fs/super.c:2086
 #3: ffff88807fa1e518 (sb_pagefaults#4){+.+.}-{0:0}, at: sb_wait_write fs/super.c:1896 [inline]
 #3: ffff88807fa1e518 (sb_pagefaults#4){+.+.}-{0:0}, at: freeze_super+0x519/0xee0 fs/super.c:2090
 #4: ffff88807fa1e610 (sb_internal#4){++++}-{0:0}, at: sb_wait_write fs/super.c:1896 [inline]
 #4: ffff88807fa1e610 (sb_internal#4){++++}-{0:0}, at: freeze_super+0x7cc/0xee0 fs/super.c:2104
1 lock held by udevd/7215:
1 lock held by syz.4.289/7443:
 #0: ffff88807fa1e0e0 (&type->s_umount_key#72){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff88807fa1e0e0 (&type->s_umount_key#72){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc2-next-20241010-syzkaller #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: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: 7215 Comm: udevd Not tainted 6.12.0-rc2-next-20241010-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:entry_SYSCALL_64_after_hwframe+0x58/0x7f
Code: ed 45 31 e4 45 31 ed 45 31 f6 45 31 ff 48 89 e7 48 63 f0 66 90 b9 48 00 00 00 65 48 8b 15 e7 79 22 74 89 d0 48 c1 ea 20 0f 30 <90> 0f 1f 44 00 00 eb 0d cc cc cc cc cc cc cc cc cc cc cc cc cc e8
RSP: 0018:ffffc900030eff58 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000048
RDX: 0000000000000000 RSI: 00000000000000e8 RDI: ffffc900030eff58
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f14bf89bc80(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd4c1dcb28 CR3: 000000006de16000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace: