INFO: task kworker/u4:4:75 blocked for more than 143 seconds.
      Not tainted 6.2.0-rc2-syzkaller-00010-g69b41ac87e4a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:4    state:D stack:17720 pid:75    ppid:2      flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:2)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x995/0xe20 kernel/sched/core.c:6555
 schedule+0xcb/0x190 kernel/sched/core.c:6631
 queue_log_writer+0x215/0x300 fs/reiserfs/journal.c:2980
 check_journal_end fs/reiserfs/journal.c:3676 [inline]
 do_journal_end+0xa38/0x4a30 fs/reiserfs/journal.c:4042
 reiserfs_write_inode+0x1f8/0x2a0 fs/reiserfs/inode.c:1779
 write_inode fs/fs-writeback.c:1451 [inline]
 __writeback_single_inode+0x4d6/0x670 fs/fs-writeback.c:1663
 writeback_sb_inodes+0x812/0x1050 fs/fs-writeback.c:1889
 wb_writeback+0x41f/0x7b0 fs/fs-writeback.c:2063
 wb_do_writeback fs/fs-writeback.c:2206 [inline]
 wb_workfn+0x3cb/0xef0 fs/fs-writeback.c:2246
 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289
 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
INFO: task syz-executor.2:7856 blocked for more than 144 seconds.
      Not tainted 6.2.0-rc2-syzkaller-00010-g69b41ac87e4a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:19672 pid:7856  ppid:5116   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x995/0xe20 kernel/sched/core.c:6555
 schedule+0xcb/0x190 kernel/sched/core.c:6631
 bit_wait+0xe/0xc0 kernel/sched/wait_bit.c:199
 __wait_on_bit+0xb5/0x170 kernel/sched/wait_bit.c:49
 __inode_wait_for_writeback fs/fs-writeback.c:1472 [inline]
 inode_wait_for_writeback+0x211/0x2c0 fs/fs-writeback.c:1484
 evict+0x277/0x620 fs/inode.c:661
 xattr_unlink fs/reiserfs/xattr.c:96 [inline]
 lookup_and_delete_xattr fs/reiserfs/xattr.c:494 [inline]
 reiserfs_xattr_set_handle+0xae5/0xec0 fs/reiserfs/xattr.c:529
 reiserfs_xattr_set+0x417/0x530 fs/reiserfs/xattr.c:633
 __vfs_removexattr+0x44a/0x480 fs/xattr.c:497
 __vfs_removexattr_locked+0x1fe/0x400 fs/xattr.c:532
 vfs_removexattr+0x104/0x2b0 fs/xattr.c:554
 ovl_do_removexattr fs/overlayfs/overlayfs.h:272 [inline]
 ovl_removexattr fs/overlayfs/overlayfs.h:280 [inline]
 ovl_make_workdir+0x5b9/0xdf0 fs/overlayfs/super.c:1361
 ovl_get_workdir+0x2e4/0x410 fs/overlayfs/super.c:1444
 ovl_fill_super+0x19d7/0x2790 fs/overlayfs/super.c:2000
 mount_nodev+0x52/0xe0 fs/super.c:1405
 legacy_get_tree+0xea/0x180 fs/fs_context.c:610
 vfs_get_tree+0x88/0x270 fs/super.c:1489
 do_new_mount+0x289/0xad0 fs/namespace.c:3145
 do_mount fs/namespace.c:3488 [inline]
 __do_sys_mount fs/namespace.c:3697 [inline]
 __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f536e28c0c9
RSP: 002b:00007f536efc8168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f536e3abf80 RCX: 00007f536e28c0c9
RDX: 0000000020000080 RSI: 00000000200000c0 RDI: 0000000000000000
RBP: 00007f536e2e7ae9 R08: 0000000020000480 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd5c41168f R14: 00007f536efc8300 R15: 0000000000022000
 </TASK>
INFO: task syz-executor.2:7890 blocked for more than 144 seconds.
      Not tainted 6.2.0-rc2-syzkaller-00010-g69b41ac87e4a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:22472 pid:7890  ppid:5116   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x995/0xe20 kernel/sched/core.c:6555
 schedule+0xcb/0x190 kernel/sched/core.c:6631
 wb_wait_for_completion+0x155/0x280 fs/fs-writeback.c:192
 sync_inodes_sb+0x283/0xaa0 fs/fs-writeback.c:2725
 sync_filesystem+0x16b/0x220 fs/sync.c:64
 reiserfs_remount+0x1a9/0x19d0 fs/reiserfs/super.c:1445
 reconfigure_super+0x3bc/0x7b0 fs/super.c:935
 do_remount fs/namespace.c:2807 [inline]
 path_mount+0xd20/0x10c0 fs/namespace.c:3467
 do_mount fs/namespace.c:3488 [inline]
 __do_sys_mount fs/namespace.c:3697 [inline]
 __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f536e28d5fa
RSP: 002b:00007f536efa6f88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f536e28d5fa
RDX: 00000000200000c0 RSI: 0000000020000100 RDI: 0000000000000000
RBP: 00007f536efa7020 R08: 00007f536efa7020 R09: 0000000001a484bc
R10: 0000000001a484bc R11: 0000000000000206 R12: 00000000200000c0
R13: 0000000020000100 R14: 00007f536efa6fe0 R15: 00000000200007c0
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8d326f50 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8d327750 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
2 locks held by kworker/1:1/26:
 #0: ffff888012872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7f2/0xdb0
 #1: ffffc90000a1fd00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264
1 lock held by khungtaskd/28:
 #0: ffffffff8d326d80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by kworker/u4:4/75:
 #0: ffff888017ed5138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x7f2/0xdb0
 #1: ffffc90001597d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264
2 locks held by getty/4747:
 #0: ffff888027e76098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 drivers/tty/n_tty.c:2177
1 lock held by syz-executor.1/5113:
 #0: ffffffff8d32c3f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
 #0: ffffffff8d32c3f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x384/0x860 kernel/rcu/tree_exp.h:946
4 locks held by syz-executor.2/7856:
 #0: ffff8880322940e0 (&type->s_umount_key#47/1){+.+.}-{3:3}, at: alloc_super+0x212/0x920 fs/super.c:228
 #1: ffff8880770e4460 (sb_writers#18){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:508
 #2: ffff88803282a400 (&type->i_mutex_dir_key#11){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline]
 #2: ffff88803282a400 (&type->i_mutex_dir_key#11){++++}-{3:3}, at: vfs_removexattr+0xed/0x2b0 fs/xattr.c:553
 #3: ffff888034e30980 (&type->i_mutex_dir_key#11/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline]
 #3: ffff888034e30980 (&type->i_mutex_dir_key#11/3){+.+.}-{3:3}, at: lookup_and_delete_xattr fs/reiserfs/xattr.c:486 [inline]
 #3: ffff888034e30980 (&type->i_mutex_dir_key#11/3){+.+.}-{3:3}, at: reiserfs_xattr_set_handle+0x521/0xec0 fs/reiserfs/xattr.c:529
2 locks held by syz-executor.2/7890:
 #0: ffff8880770e40e0 (&type->s_umount_key#57){++++}-{3:3}, at: do_remount fs/namespace.c:2804 [inline]
 #0: ffff8880770e40e0 (&type->s_umount_key#57){++++}-{3:3}, at: path_mount+0xcd8/0x10c0 fs/namespace.c:3467
 #1: ffff888146eb07d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline]
 #1: ffff888146eb07d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x264/0xaa0 fs/fs-writeback.c:2723
3 locks held by syz-executor.2/11316:
1 lock held by syz-executor.0/11319:
 #0: ffffffff8d32c3f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline]
 #0: ffffffff8d32c3f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x455/0x860 kernel/rcu/tree_exp.h:946

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

NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc2-syzkaller-00010-g69b41ac87e4a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x46f/0x4f0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x1ba/0x420 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
 watchdog+0xcd5/0xd20 kernel/hung_task.c:377
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5113 Comm: syz-executor.1 Not tainted 6.2.0-rc2-syzkaller-00010-g69b41ac87e4a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:remove_class_from_lock_chain kernel/locking/lockdep.c:5958 [inline]
RIP: 0010:remove_class_from_lock_chains kernel/locking/lockdep.c:5997 [inline]
RIP: 0010:zap_class+0x2da/0x810 kernel/locking/lockdep.c:6039
Code: 49 8b 07 4c 8d 78 f8 48 85 c0 4c 0f 44 f8 4d 85 ff 74 9d 4d 89 fd 49 c1 ed 03 43 8a 44 35 00 84 c0 0f 85 21 02 00 00 41 8b 1f <f6> c3 fc 0f 84 f2 01 00 00 48 c1 eb 08 66 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc900044cfb28 EFLAGS: 00000046
RAX: 1ffffffff20dec00 RBX: 0000000001e3871c RCX: ffffffff816c6d44
RDX: 0000000000000001 RSI: 0000000000000bf6 RDI: 0000000000000bf5
RBP: 000000000000012a R08: dffffc0000000000 R09: fffffbfff23f9d7b
R10: fffffbfff23f9d7b R11: 1ffffffff23f9d7a R12: 0000000000000ba2
R13: 1ffffffff2117d98 R14: dffffc0000000000 R15: ffffffff908becc0
FS:  00005555560e6400(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7647ed56be CR3: 000000002d317000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __lockdep_free_key_range kernel/locking/lockdep.c:6158 [inline]
 lockdep_unregister_key+0x440/0x5b0 kernel/locking/lockdep.c:6354
 wq_unregister_lockdep kernel/workqueue.c:3497 [inline]
 destroy_workqueue+0x85a/0xed0 kernel/workqueue.c:4464
 xfs_destroy_mount_workqueues+0x87/0x100 fs/xfs/xfs_super.c:585
 xfs_fs_put_super+0x245/0x2d0 fs/xfs/xfs_super.c:1122
 generic_shutdown_super+0x130/0x310 fs/super.c:492
 kill_block_super+0x79/0xd0 fs/super.c:1386
 deactivate_locked_super+0xa7/0xf0 fs/super.c:332
 cleanup_mnt+0x494/0x520 fs/namespace.c:1291
 task_work_run+0x243/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4f68e8d537
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd77c4c298 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f4f68e8d537
RDX: 00007ffd77c4c36b RSI: 000000000000000a RDI: 00007ffd77c4c360
RBP: 00007ffd77c4c360 R08: 00000000ffffffff R09: 00007ffd77c4c130
R10: 00005555560e78b3 R11: 0000000000000246 R12: 00007f4f68ee6b24
R13: 00007ffd77c4d420 R14: 00005555560e7810 R15: 00007ffd77c4d460
 </TASK>