INFO: task syz-executor.4:5097 blocked for more than 143 seconds.
Not tainted 6.7.0-rc7-syzkaller-00003-gfbafc3e621c3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:20528 pid:5097 tgid:5097 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
rwsem_down_write_slowpath+0xeea/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
__super_lock fs/super.c:56 [inline]
__super_lock_excl fs/super.c:71 [inline]
deactivate_super+0xad/0xf0 fs/super.c:516
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1256
task_work_run+0x24a/0x300 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb1/0x150 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x69/0x2a0 kernel/entry/common.c:296
do_syscall_64+0x52/0x110 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fc0e8c7e017
RSP: 002b:00007ffcee164d18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fc0e8c7e017
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffcee164dd0
RBP: 00007ffcee164dd0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcee165e90
R13: 00007fc0e8cc83b9 R14: 000000000003a76e R15: 0000000000000001
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u4:2/42:
#0: ffff8880b983c358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558
#1: ffff8880b9828808 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
3 locks held by kworker/u4:8/1096:
2 locks held by getty/4817:
#0: ffff88802aa020a0 (&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+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.4/5097:
#0: ffff88807c5ce0e0 (&type->s_umount_key#25){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88807c5ce0e0 (&type->s_umount_key#25){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88807c5ce0e0 (&type->s_umount_key#25){++++}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:516
5 locks held by syz-executor.0/6548:
1 lock held by syz-executor.0/6629:
#0: ffff88807c5ce0e0 (&type->s_umount_key#25){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88807c5ce0e0 (&type->s_umount_key#25){++++}-{3:3}, at: super_lock+0x176/0x3a0 fs/super.c:117
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc7-syzkaller-00003-gfbafc3e621c3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x310 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 6548 Comm: syz-executor.0 Not tainted 6.7.0-rc7-syzkaller-00003-gfbafc3e621c3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:check_preemption_disabled+0x2/0x110 lib/smp_processor_id.c:13
Code: 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 48 c7 c7 40 e0 bd 8b 48 c7 c6 80 e0 bd 8b eb 0c 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 57 <41> 56 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24
RSP: 0018:ffffc900035df010 EFLAGS: 00000046
RAX: 0000000000000006 RBX: 0000000000000000 RCX: ffff88803c0ed940
RDX: ffff88803c0ed940 RSI: ffffffff8b6ab6e0 RDI: ffffffff8bbde0a0
RBP: 0000000000000006 R08: ffffffff8b12d9e9 R09: 1ffffffff21bae6c
R10: dffffc0000000000 R11: fffffbfff21bae6d R12: 0000000000000246
R13: ffff88803c0ed940 R14: 00000000ffffffff R15: ffff88801b1f7018
FS: 00007feaabe306c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc8f000c866 CR3: 0000000028ada000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
lock_is_held_type+0x100/0x190 kernel/locking/lockdep.c:5826
lock_is_held include/linux/lockdep.h:288 [inline]
xa_entry include/linux/xarray.h:1216 [inline]
xas_descend+0xfe/0x470 lib/xarray.c:206
xas_load+0xbe/0x140 lib/xarray.c:244
filemap_get_entry+0x1fe/0x4d0 mm/filemap.c:1806
__filemap_get_folio+0x65/0xbb0 mm/filemap.c:1851
__find_get_block_slow fs/buffer.c:203 [inline]
__find_get_block+0x3de/0x1150 fs/buffer.c:1401
flush_commit_list+0x9fb/0x1c50 fs/reiserfs/journal.c:1052
flush_journal_list+0x2a8/0x1c80 fs/reiserfs/journal.c:1390
flush_used_journal_lists+0x1256/0x15d0 fs/reiserfs/journal.c:1828
do_journal_end+0x3d51/0x4b40
do_journal_begin_r+0x970/0x1030
journal_begin+0x14c/0x360 fs/reiserfs/journal.c:3254
reiserfs_sync_fs+0xb0/0x150 fs/reiserfs/super.c:77
dquot_quota_sync+0xdb/0x490 fs/quota/dquot.c:753
iterate_supers+0xc2/0x180 fs/super.c:971
quota_sync_all fs/quota/quota.c:69 [inline]
__do_sys_quotactl fs/quota/quota.c:938 [inline]
__se_sys_quotactl+0x391/0xa30 fs/quota/quota.c:917
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7feaab07cce9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007feaabe300c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007feaab19c050 RCX: 00007feaab07cce9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007feaab0c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007feaab19c050 R15: 00007ffd47f31838