REISERFS warning (device loop5): sh-2021 reiserfs_fill_super: can not find reiserfs on loop5
REISERFS warning (device loop2): super-6502 reiserfs_getopt: unknown mount option "j"
INFO: task kworker/u4:3:2308 blocked for more than 140 seconds.
Not tainted 4.14.159-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:3 D25792 2308 2 0x80000000
Workqueue: events_unbound flush_to_ldisc
Call Trace:
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384
schedule+0x92/0x1c0 kernel/sched/core.c:3428
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908
flush_to_ldisc+0x39/0x400 drivers/tty/tty_buffer.c:499
process_one_work+0x863/0x1600 kernel/workqueue.c:2114
worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248
kthread+0x319/0x430 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Showing all locks held in the system:
1 lock held by khungtaskd/1044:
#0: (tasklist_lock){.+.+}, at: [<ffffffff8148c8d8>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4544
3 locks held by kworker/u4:3/2308:
#0: ("events_unbound"){+.+.}, at: [<ffffffff813d581e>] work_static include/linux/workqueue.h:199 [inline]
#0: ("events_unbound"){+.+.}, at: [<ffffffff813d581e>] set_work_data kernel/workqueue.c:619 [inline]
#0: ("events_unbound"){+.+.}, at: [<ffffffff813d581e>] set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline]
#0: ("events_unbound"){+.+.}, at: [<ffffffff813d581e>] process_one_work+0x76e/0x1600 kernel/workqueue.c:2085
#1: ((&buf->work)){+.+.}, at: [<ffffffff813d585b>] process_one_work+0x7ab/0x1600 kernel/workqueue.c:2089
#2: (&buf->lock){+.+.}, at: [<ffffffff834a0cf9>] flush_to_ldisc+0x39/0x400 drivers/tty/tty_buffer.c:499
1 lock held by rsyslogd/6686:
#0: (&f->f_pos_lock){+.+.}, at: [<ffffffff81966a5b>] __fdget_pos+0xab/0xd0 fs/file.c:769
2 locks held by getty/6809:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff866559d3>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83491bf6>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by getty/6810:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff866559d3>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83491bf6>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by getty/6811:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff866559d3>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83491bf6>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by getty/6812:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff866559d3>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83491bf6>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by getty/6813:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff866559d3>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83491bf6>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by getty/6814:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff866559d3>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83491bf6>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by syz-executor.2/15830:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff866559d3>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83491bf6>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1044 Comm: khungtaskd Not tainted 4.14.159-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x142/0x197 lib/dump_stack.c:58
nmi_cpu_backtrace.cold+0x57/0x94 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x141/0x189 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline]
watchdog+0x5e7/0xb90 kernel/hung_task.c:274
kthread+0x319/0x430 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 31667 Comm: syz-executor.0 Not tainted 4.14.159-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880324cc640 task.stack: ffff8880a8588000
RIP: 0010:lock_release+0x66/0x940 kernel/locking/lockdep.c:4006
RSP: 0018:ffff8880a858f830 EFLAGS: 00000086
RAX: dffffc0000000000 RBX: 1ffff110150b1f0c RCX: ffff8880324ccec0
RDX: ffffed10150b1f0c RSI: 0000000000000001 RDI: ffff8880324ccebc
RBP: ffff8880a858f8c8 R08: ffff8880aec2b558 R09: 0000000000000003
R10: 0000000000000000 R11: ffff8880324cc640 R12: ffff8880aec2b558
R13: ffffffff86644bbb R14: ffff8880324cc640 R15: ffff8880a858f8a0
FS: 00007f5d89918700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c420308000 CR3: 0000000096c9d000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:166 [inline]
_raw_spin_unlock_irq+0x1b/0x90 kernel/locking/spinlock.c:200
rq_unlock_irq kernel/sched/sched.h:1766 [inline]
__schedule+0x137b/0x1cd0 kernel/sched/core.c:3387
schedule+0x92/0x1c0 kernel/sched/core.c:3428
paste_selection+0x293/0x3f2 drivers/tty/vt/selection.c:355
tioclinux+0x10e/0x400 drivers/tty/vt/vt.c:2696
vt_ioctl+0x180c/0x2170 drivers/tty/vt/vt_ioctl.c:364
tty_ioctl+0x841/0x1320 drivers/tty/tty_io.c:2661
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:500 [inline]
do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45a919
RSP: 002b:00007f5d89917c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a919
RDX: 0000000020000040 RSI: 000000000000541c RDI: 0000000000000006
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5d899186d4
R13: 00000000004c5c62 R14: 00000000004dbf18 R15: 00000000ffffffff
Code: 45 a0 da e4 ac 87 65 4c 8b 34 25 40 ee 01 00 49 8d be 7c 08 00 00 48 c7 45 a8 50 99 48 81 c7 02 f1 f1 f1 f1 c7 42 04 04 f3 f3 f3 <48> 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38