INFO: task syz-executor247:5087 blocked for more than 143 seconds.
Not tainted 6.3.0-rc3-next-20230322-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor247 state:D stack:27440 pid:5087 ppid:5085 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5305 [inline]
__schedule+0x1d23/0x5650 kernel/sched/core.c:6623
schedule+0xde/0x1a0 kernel/sched/core.c:6699
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6758
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747
blkdev_put+0xc0/0x770 block/bdev.c:833
blkdev_close+0x68/0x80 block/fops.c:507
__fput+0x27c/0xa90 fs/file_table.c:321
task_work_run+0x16f/0x270 kernel/task_work.c:179
ptrace_notify+0x118/0x140 kernel/signal.c:2354
ptrace_report_syscall include/linux/ptrace.h:411 [inline]
ptrace_report_syscall_exit include/linux/ptrace.h:473 [inline]
syscall_exit_work kernel/entry/common.c:252 [inline]
syscall_exit_to_user_mode_prepare+0x129/0x220 kernel/entry/common.c:279
__syscall_exit_to_user_mode_work kernel/entry/common.c:284 [inline]
syscall_exit_to_user_mode+0xd/0x50 kernel/entry/common.c:297
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f44ae61bbbb
RSP: 002b:00007fffa2fdd5c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00007f44ae61bbbb
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000006 R08: 0000000000000000 R09: 0000000000000064
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000f2be
R13: 00007f44ae6e44dc R14: 00007fffa2fdd620 R15: 00007f44ae6e44c0
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8c795a70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:516
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8c795770 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:516
1 lock held by khungtaskd/28:
#0: ffffffff8c796680 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x390 kernel/locking/lockdep.c:6545
2 locks held by getty/4763:
#0: ffff888028452098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2176
1 lock held by syz-executor247/5087:
#0: ffff888146b3b4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xc0/0x770 block/bdev.c:833
1 lock held by udevd/5089:
#0: ffff888146b3b4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb80 block/bdev.c:735
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc3-next-20230322-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x2a4/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xe16/0x1090 kernel/hung_task.c:379
kthread+0x33e/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2801 Comm: kworker/u4:6 Not tainted 6.3.0-rc3-next-20230322-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:decay_load+0x9/0xa0 kernel/sched/pelt.c:32
Code: 0c 48 2d b0 01 00 00 5b c3 31 c0 5b c3 0f 0b eb f0 e8 bb 9e 77 00 eb b5 e8 d4 9e 77 00 eb d6 66 90 48 81 fe e0 07 00 00 77 65 <55> 89 f0 48 89 e5 41 54 53 48 89 fb 48 83 e4 f0 48 83 fe 1f 77 52
RSP: 0018:ffffc9000c1c7698 EFLAGS: 00000087
RAX: 000000000000001a RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000000ba7e
RBP: ffff8880b993c500 R08: ffff8880b993d0d0 R09: ffff8880b993d0c8
R10: fffffbfff1cf1072 R11: ffff8880b993d0d8 R12: 0000000000000001
R13: ffff8880b993d0dc R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563246f0f680 CR3: 000000000c571000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__accumulate_pelt_segments kernel/sched/pelt.c:75 [inline]
accumulate_sum kernel/sched/pelt.c:135 [inline]
___update_load_sum kernel/sched/pelt.c:226 [inline]
update_irq_load_avg+0x74d/0xd40 kernel/sched/pelt.c:457
update_rq_clock_task kernel/sched/core.c:725 [inline]
update_rq_clock kernel/sched/core.c:749 [inline]
update_rq_clock+0x3e5/0xaa0 kernel/sched/core.c:730
load_balance+0xb00/0x2c40 kernel/sched/fair.c:10751
newidle_balance+0x6e2/0x11e0 kernel/sched/fair.c:11767
pick_next_task_fair+0x9a/0x1290 kernel/sched/fair.c:8070
__pick_next_task kernel/sched/core.c:5933 [inline]
pick_next_task kernel/sched/core.c:6008 [inline]
__schedule+0x45c/0x5650 kernel/sched/core.c:6587
schedule+0xde/0x1a0 kernel/sched/core.c:6699
toggle_allocation_gate mm/kfence/core.c:805 [inline]
toggle_allocation_gate+0x1ad/0x230 mm/kfence/core.c:795
process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
kthread+0x33e/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.195 msecs