INFO: task kworker/u4:2:34 blocked for more than 143 seconds.
Not tainted 6.8.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:2 state:D stack:21552 pid:34 tgid:34 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:3)
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
io_schedule+0x8c/0x110 kernel/sched/core.c:9023
TXN_SLEEP_DROP_LOCK fs/jfs/jfs_txnmgr.c:125 [inline]
txBegin+0x260/0xcd0 fs/jfs/jfs_txnmgr.c:374
jfs_commit_inode+0x223/0x590 fs/jfs/inode.c:101
jfs_write_inode+0x143/0x220 fs/jfs/inode.c:132
write_inode fs/fs-writeback.c:1473 [inline]
__writeback_single_inode+0x69f/0xfd0 fs/fs-writeback.c:1690
writeback_sb_inodes+0x8e3/0x1220 fs/fs-writeback.c:1916
wb_writeback+0x44d/0xc80 fs/fs-writeback.c:2092
wb_do_writeback fs/fs-writeback.c:2239 [inline]
wb_workfn+0x400/0xfb0 fs/fs-writeback.c:2279
process_one_work kernel/workqueue.c:2633 [inline]
process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706
worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
INFO: task syz-executor.3:5088 blocked for more than 143 seconds.
Not tainted 6.8.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:18608 pid:5088 tgid:5088 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
wb_wait_for_completion+0x166/0x290 fs/fs-writeback.c:192
__writeback_inodes_sb_nr+0x2d2/0x380 fs/fs-writeback.c:2672
sync_filesystem+0xa4/0x230 fs/sync.c:54
generic_shutdown_super+0x72/0x2d0 fs/super.c:620
kill_block_super+0x44/0x90 fs/super.c:1675
deactivate_locked_super+0xc4/0x130 fs/super.c:472
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1267
task_work_run+0x24e/0x310 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:108 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0x167/0x360 kernel/entry/common.c:212
do_syscall_64+0x108/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f73e9e7f0d7
RSP: 002b:00007ffc27fe2ba8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f73e9e7f0d7
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffc27fe2c60
RBP: 00007ffc27fe2c60 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc27fe3d20
R13: 00007f73e9ec93b9 R14: 00000000001adc66 R15: 0000000000000002
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u4:2/34:
#0: ffff8880192d1938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff8880192d1938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc90000aafd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc90000aafd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
2 locks held by getty/4814:
#0: ffff88802ac5c0a0 (&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.3/5088:
#0: ffff88808824c0e0 (&type->s_umount_key#94){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88808824c0e0 (&type->s_umount_key#94){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88808824c0e0 (&type->s_umount_key#94){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:504
2 locks held by kworker/u4:8/29288:
#0: ffff8880b943c918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
#1: ffff8880b9428988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 32 Comm: kcompactd0 Not tainted 6.8.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:look_up_lock_class+0x92/0x160 kernel/locking/lockdep.c:932
Code: e8 34 48 8b 1c c5 60 ca ce 93 e8 b9 01 00 00 48 85 db 0f 84 b7 00 00 00 4c 39 7b 40 74 05 48 8b 1b eb e7 48 8b 83 b8 00 00 00 <49> 3b 46 18 0f 84 9d 00 00 00 48 c7 c0 20 83 b1 92 49 39 06 0f 84
RSP: 0018:ffffc90000a8f5f0 EFLAGS: 00000046
RAX: ffffffff8bac9920 RBX: ffffffff929485a0 RCX: ffff88801b6d3b80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90000a8fa88
RBP: ffffc90000a8f700 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff1f0879e R12: ffffc90000a8fa88
R13: ffffc90000a8fa88 R14: ffffc90000a8fa88 R15: ffffffff944932a0
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a2aa8ff680 CR3: 000000000df32000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
register_lock_class+0x102/0x980 kernel/locking/lockdep.c:1284
__lock_acquire+0xd9/0x1fd0 kernel/locking/lockdep.c:5014
lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754
__timer_delete_sync+0x148/0x310 kernel/time/timer.c:1555
timer_delete_sync kernel/time/timer.c:1628 [inline]
del_timer_sync include/linux/timer.h:185 [inline]
schedule_timeout+0x1c7/0x310 kernel/time/timer.c:2184
kcompactd+0xaa9/0x1b80 mm/compaction.c:3108
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243