INFO: task syz.0.26:5391 blocked for more than 143 seconds.
      Not tainted 5.15.189-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.26        state:D stack:26432 pid: 5391 ppid:  5368 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x11b8/0x43b0 kernel/sched/core.c:6376
 schedule+0x11b/0x1e0 kernel/sched/core.c:6459
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6518
 rwsem_down_read_slowpath+0x528/0x990 kernel/locking/rwsem.c:1055
 __down_read_common kernel/locking/rwsem.c:1239 [inline]
 __down_read kernel/locking/rwsem.c:1252 [inline]
 down_read+0x96/0x2e0 kernel/locking/rwsem.c:1500
 user_get_super+0x118/0x240 fs/super.c:850
 quotactl_block fs/quota/quota.c:889 [inline]
 __do_sys_quotactl fs/quota/quota.c:953 [inline]
 __se_sys_quotactl+0x45e/0x6c0 fs/quota/quota.c:915
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f8badc4d969
RSP: 002b:00007f8bacebd038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f8bade74fa0 RCX: 00007f8badc4d969
RDX: 0000000000000000 RSI: 0000200000000140 RDI: ffffffff80000800
RBP: 00007f8badccfab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8bade74fa0 R15: 00007ffe644c8b58
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8c11c360 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3945:
 #0: ffff88802bd26098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc900025ce2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5ba/0x1a30 drivers/tty/n_tty.c:2158
2 locks held by kworker/u4:4/4219:
3 locks held by syz.0.16/5091:
 #0: ffff88807bb440e0 (&type->s_umount_key#25/1){+.+.}-{3:3}, at: alloc_super+0x201/0x950 fs/super.c:229
 #1: ffffc900033a10f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
 #1: ffffc900033a10f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
 #1: ffffc900033a10f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
 #2: ffffc900033a1180 (&journal->j_flush_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
 #2: ffffc900033a1180 (&journal->j_flush_mutex){+.+.}-{3:3}, at: flush_journal_list+0x180/0x1ba0 fs/reiserfs/journal.c:1366
3 locks held by syz.1.17/5116:
 #0: ffff88805e6ee0e0 (&type->s_umount_key#25/1){+.+.}-{3:3}, at: alloc_super+0x201/0x950 fs/super.c:229
 #1: ffffc900034d10f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
 #1: ffffc900034d10f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
 #1: ffffc900034d10f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
 #2: ffffc900034d1180 (&journal->j_flush_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
 #2: ffffc900034d1180 (&journal->j_flush_mutex){+.+.}-{3:3}, at: flush_journal_list+0x180/0x1ba0 fs/reiserfs/journal.c:1366
3 locks held by syz.2.18/5140:
6 locks held by syz.3.19/5165:
 #0: ffff8880694d20e0 (&type->s_umount_key#25/1){+.+.}-{3:3}, at: alloc_super+0x201/0x950 fs/super.c:229
 #1: ffffc900037210f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
 #1: ffffc900037210f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
 #1: ffffc900037210f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
 #2: ffffc90003721180 (&journal->j_flush_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
 #2: ffffc90003721180 (&journal->j_flush_mutex){+.+.}-{3:3}, at: flush_journal_list+0x180/0x1ba0 fs/reiserfs/journal.c:1366
 #3: ffff88804f5fc090 (&jl->j_commit_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
 #3: ffff88804f5fc090 (&jl->j_commit_mutex){+.+.}-{3:3}, at: flush_commit_list+0x6d8/0x1d70 fs/reiserfs/journal.c:1005
 #4: ffff8880b913a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475
 #5: ffffe8ffffd7aac8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x495/0x810 kernel/sched/psi.c:882
4 locks held by syz.4.20/5199:
 #0: ffff888074b3c0e0 (&type->s_umount_key#25/1){+.+.}-{3:3}, at: alloc_super+0x201/0x950 fs/super.c:229
 #1: ffffc900038510f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
 #1: ffffc900038510f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
 #1: ffffc900038510f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
 #2: ffffc90003851180 (&journal->j_flush_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
 #2: ffffc90003851180 (&journal->j_flush_mutex){+.+.}-{3:3}, at: flush_journal_list+0x180/0x1ba0 fs/reiserfs/journal.c:1366
 #3: ffff88801e50f890 (&jl->j_commit_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
 #3: ffff88801e50f890 (&jl->j_commit_mutex){+.+.}-{3:3}, at: flush_commit_list+0x6d8/0x1d70 fs/reiserfs/journal.c:1005
4 locks held by syz.5.21/5227:
4 locks held by syz.6.22/5260:
 #0: ffff88802002e0e0 (&type->s_umount_key#25/1){+.+.}-{3:3}, at: alloc_super+0x201/0x950 fs/super.c:229
 #1: ffffc90003b210f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
 #1: ffffc90003b210f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
 #1: ffffc90003b210f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
 #2: ffffc90003b21180 (&journal->j_flush_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
 #2: ffffc90003b21180 (&journal->j_flush_mutex){+.+.}-{3:3}, at: flush_journal_list+0x180/0x1ba0 fs/reiserfs/journal.c:1366
 #3: ffff8880b913a318 (&rq->__lock){-.-.}-{2:2}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
 #3: ffff8880b913a318 (&rq->__lock){-.-.}-{2:2}, at: flush_commit_list+0x6d8/0x1d70 fs/reiserfs/journal.c:1005
4 locks held by syz.7.23/5298:
3 locks held by syz.8.24/5329:
 #0: ffff88801c4e00e0 (&type->s_umount_key#25/1){+.+.}-{3:3}, at: alloc_super+0x201/0x950 fs/super.c:229
 #1: ffffc90003fe10f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
 #1: ffffc90003fe10f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
 #1: ffffc90003fe10f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
 #2: ffffc90003fe1180 (&journal->j_flush_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
 #2: ffffc90003fe1180 (&journal->j_flush_mutex){+.+.}-{3:3}, at: flush_journal_list+0x180/0x1ba0 fs/reiserfs/journal.c:1366
3 locks held by syz.9.25/5359:
 #0: ffff88807b50e0e0 (&type->s_umount_key#25/1){+.+.}-{3:3}, at: alloc_super+0x201/0x950 fs/super.c:229
 #1: ffffc900041410f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
 #1: ffffc900041410f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
 #1: ffffc900041410f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
 #2: ffffc90004141180 (&journal->j_flush_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
 #2: ffffc90004141180 (&journal->j_flush_mutex){+.+.}-{3:3}, at: flush_journal_list+0x180/0x1ba0 fs/reiserfs/journal.c:1366
1 lock held by syz.0.26/5391:
 #0: ffff88807bb440e0 (&type->s_umount_key#53){.+.+}-{3:3}, at: user_get_super+0x118/0x240 fs/super.c:850
1 lock held by syz.1.27/5414:
 #0: ffff88805e6ee0e0 (&type->s_umount_key#53){.+.+}-{3:3}, at: user_get_super+0x118/0x240 fs/super.c:850
1 lock held by syz.2.28/5444:
 #0: ffff888077f7e0e0 (&type->s_umount_key#53){.+.+}-{3:3}, at: user_get_super+0x118/0x240 fs/super.c:850
1 lock held by syz.3.29/5469:
 #0: ffff8880694d20e0 (&type->s_umount_key#53){.+.+}-{3:3}, at: user_get_super+0x118/0x240 fs/super.c:850
1 lock held by syz.4.30/5499:
 #0: ffff888074b3c0e0 (&type->s_umount_key#53){.+.+}-{3:3}, at: user_get_super+0x118/0x240 fs/super.c:850
1 lock held by syz.5.31/5534:
 #0: ffff8880584160e0 (&type->s_umount_key#53){.+.+}-{3:3}, at: user_get_super+0x118/0x240 fs/super.c:850
1 lock held by syz-executor344/5573:
 #0: ffff88807bb440e0 (&type->s_umount_key#53){.+.+}-{3:3}, at: user_get_super+0x118/0x240 fs/super.c:850
1 lock held by syz.6.32/5577:
 #0: ffff88802002e0e0 (&type->s_umount_key#53){.+.+}-{3:3}, at: user_get_super+0x118/0x240 fs/super.c:850

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

NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x397/0x3d0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
 watchdog+0xe0f/0xe50 kernel/hung_task.c:369
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5140 Comm: syz.2.18 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:106 [inline]
RIP: 0010:lock_is_held_type+0x61/0x190 kernel/locking/lockdep.c:5662
Code: 0f 85 f4 00 00 00 65 48 8b 1d 9b 3f 5a 76 83 bb ec 0a 00 00 00 0f 85 df 00 00 00 41 89 f7 49 89 fe 48 c7 04 24 00 00 00 00 9c <8f> 04 24 4c 8b 2c 24 fa 48 c7 c7 c0 23 0b 8a e8 4b 0e 00 00 65 ff
RSP: 0018:ffffc900035ef340 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88801a1cd940 RCX: 3692dde1f27d5100
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8c11c360
RBP: 00000000ffffffff R08: dffffc0000000000 R09: fffffbfff1ff6e19
R10: fffffbfff1ff6e19 R11: 1ffffffff1ff6e18 R12: ffffc900035ef480
R13: ffff888016cf4390 R14: ffffffff8c11c360 R15: 00000000ffffffff
FS:  00007f5ab4bf46c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a1f3a1ba48 CR3: 0000000021285000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 xa_entry include/linux/xarray.h:1182 [inline]
 xas_descend+0x101/0x3b0 lib/xarray.c:204
 xas_load+0xba/0x140 lib/xarray.c:240
 mapping_get_entry mm/filemap.c:1826 [inline]
 pagecache_get_page+0x19d/0xef0 mm/filemap.c:1894
 find_get_page_flags include/linux/pagemap.h:357 [inline]
 __find_get_block_slow fs/buffer.c:202 [inline]
 __find_get_block+0x366/0x10b0 fs/buffer.c:1310
 __getblk_gfp+0x2c/0xb70 fs/buffer.c:1332
 __getblk include/linux/buffer_head.h:416 [inline]
 do_journal_end+0x22ee/0x42d0 fs/reiserfs/journal.c:4204
 do_journal_begin_r+0xa36/0x1010 fs/reiserfs/journal.c:-1
 journal_begin+0x148/0x350 fs/reiserfs/journal.c:3253
 reiserfs_fill_super+0x1654/0x23e0 fs/reiserfs/super.c:2108
 mount_bdev+0x287/0x3c0 fs/super.c:1400
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x24a/0xa40 fs/namespace.c:3014
 do_mount fs/namespace.c:3357 [inline]
 __do_sys_mount fs/namespace.c:3565 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3542
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f5ab598610a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5ab4bf3e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f5ab4bf3ef0 RCX: 00007f5ab598610a
RDX: 0000200000000080 RSI: 0000200000000040 RDI: 00007f5ab4bf3eb0
RBP: 0000200000000080 R08: 00007f5ab4bf3ef0 R09: 000000000000800c
R10: 000000000000800c R11: 0000000000000246 R12: 0000200000000040
R13: 00007f5ab4bf3eb0 R14: 000000000000112d R15: 0000200000000300
 </TASK>