INFO: task syz-executor314:3609 blocked for more than 143 seconds.
Not tainted 6.0.0-rc1-next-20220819-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor314 state:D stack:27472 pid:3609 ppid:3608 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5197 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6509
schedule+0xda/0x1b0 kernel/sched/core.c:6585
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6644
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747
blkdev_put+0xbc/0x770 block/bdev.c:910
blkdev_close+0x64/0x80 block/fops.c:499
__fput+0x27c/0xa90 fs/file_table.c:320
task_work_run+0xdd/0x1a0 kernel/task_work.c:177
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xc39/0x2b60 kernel/exit.c:814
do_group_exit+0xd0/0x2a0 kernel/exit.c:944
get_signal+0x238c/0x2610 kernel/signal.c:2858
arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f405a4936b9
RSP: 002b:00007fffa05f7ea8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 00007f405a4936b9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fffa05f8048 R09: 00007fffa05f8048
R10: 00007fffa05f8048 R11: 0000000000000246 R12: 00007f405a452740
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
</TASK>
Showing all threads with locks held in the system:
task:rcu_tasks_kthre state:I stack:29000 pid:12 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5197 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6509
schedule+0xda/0x1b0 kernel/sched/core.c:6585
rcu_tasks_one_gp+0x3e5/0xc70 kernel/rcu/tasks.h:514
rcu_tasks_kthread+0x73/0xa0 kernel/rcu/tasks.h:552
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8bf88f30 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
task:rcu_tasks_trace state:I stack:29120 pid:13 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5197 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6509
schedule+0xda/0x1b0 kernel/sched/core.c:6585
rcu_tasks_one_gp+0x3e5/0xc70 kernel/rcu/tasks.h:514
rcu_tasks_kthread+0x73/0xa0 kernel/rcu/tasks.h:552
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8bf88c30 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
task:getty state:S stack:23392 pid:3291 ppid:1 flags:0x00000000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5197 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6509
schedule+0xda/0x1b0 kernel/sched/core.c:6585
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911
wait_woken+0x18b/0x1f0 kernel/sched/wait.c:459
n_tty_read+0x1051/0x13e0 drivers/tty/n_tty.c:2243
iterate_tty_read drivers/tty/tty_io.c:858 [inline]
tty_read+0x33a/0x5d0 drivers/tty/tty_io.c:933
call_read_iter include/linux/fs.h:2182 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x67d/0x930 fs/read_write.c:470
ksys_read+0x127/0x250 fs/read_write.c:607
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5d67df78fe
RSP: 002b:00007ffe224e8e18 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000562f95923910 RCX: 00007f5d67df78fe
RDX: 0000000000000001 RSI: 00007ffe224e8e30 RDI: 0000000000000000
RBP: 0000562f95923970 R08: 0000000000000007 R09: 0000562f95924cd0
R10: 0000000000000063 R11: 0000000000000246 R12: 0000562f959239ac
R13: 00007ffe224e8e30 R14: 0000000000000000 R15: 0000562f959239ac
</TASK>
2 locks held by getty/3291:
#0: ffff888026c16098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002d232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef0/0x13e0 drivers/tty/n_tty.c:2177
task:syz-executor314 state:D stack:27472 pid:3609 ppid:3608 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5197 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6509
schedule+0xda/0x1b0 kernel/sched/core.c:6585
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6644
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747
blkdev_put+0xbc/0x770 block/bdev.c:910
blkdev_close+0x64/0x80 block/fops.c:499
__fput+0x27c/0xa90 fs/file_table.c:320
task_work_run+0xdd/0x1a0 kernel/task_work.c:177
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xc39/0x2b60 kernel/exit.c:814
do_group_exit+0xd0/0x2a0 kernel/exit.c:944
get_signal+0x238c/0x2610 kernel/signal.c:2858
arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f405a4936b9
RSP: 002b:00007fffa05f7ea8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 00007f405a4936b9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fffa05f8048 R09: 00007fffa05f8048
R10: 00007fffa05f8048 R11: 0000000000000246 R12: 00007f405a452740
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
</TASK>
1 lock held by syz-executor314/3609:
#0: ffff88801db724c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xbc/0x770 block/bdev.c:910
task:udevd state:D stack:26240 pid:3611 ppid:2974 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5197 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6509
schedule+0xda/0x1b0 kernel/sched/core.c:6585
io_schedule+0xba/0x130 kernel/sched/core.c:8729
folio_wait_bit_common+0x49f/0xa20 mm/filemap.c:1295
folio_put_wait_locked mm/filemap.c:1464 [inline]
do_read_cache_folio+0x2c0/0x510 mm/filemap.c:3495
read_mapping_folio include/linux/pagemap.h:762 [inline]
read_part_sector+0xf6/0x440 block/partitions/core.c:714
adfspart_check_POWERTEC+0x93/0x680 block/partitions/acorn.c:454
check_partition block/partitions/core.c:146 [inline]
blk_add_partitions block/partitions/core.c:599 [inline]
bdev_disk_changed block/partitions/core.c:685 [inline]
bdev_disk_changed+0x629/0xf60 block/partitions/core.c:652
blkdev_get_whole+0x18a/0x2d0 block/bdev.c:684
blkdev_get_by_dev.part.0+0x5ec/0xb90 block/bdev.c:821
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:855
blkdev_open+0x13c/0x2c0 block/fops.c:485
do_dentry_open+0x6cc/0x13f0 fs/open.c:880
do_open fs/namei.c:3557 [inline]
path_openat+0x1c92/0x28f0 fs/namei.c:3691
do_filp_open+0x1b6/0x400 fs/namei.c:3718
do_sys_openat2+0x16d/0x4c0 fs/open.c:1308
do_sys_open fs/open.c:1324 [inline]
__do_sys_openat fs/open.c:1340 [inline]
__se_sys_openat fs/open.c:1335 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1335
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f01b6125697
RSP: 002b:00007ffedbed9ad0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000563d946a3bd0 RCX: 00007f01b6125697
RDX: 00000000000a0800 RSI: 0000563d9469a790 RDI: 00000000ffffff9c
RBP: 0000563d9469a790 R08: 0000000000000001 R09: 00007ffedbf8e080
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 0000563d946bed40 R14: 00007ffedbed9b7c R15: 0000563d94699910
</TASK>
1 lock held by udevd/3611:
#0: ffff88801db724c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb90 block/bdev.c:812
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc1-next-20220819-syzkaller #0
khungtaskd[28] cmdline: ��a�����
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:122 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:140
nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:227 [inline]
watchdog+0xcf7/0xfd0 kernel/hung_task.c:384
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x6f/0xb0 drivers/acpi/processor_idle.c:112