INFO: task udevd:5328 blocked for more than 143 seconds.
Not tainted 6.1.0-rc6-next-20221125-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:26296 pid:5328 ppid:4657 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0xb8a/0x5450 kernel/sched/core.c:6561
schedule+0xde/0x1b0 kernel/sched/core.c:6637
io_schedule+0xbe/0x130 kernel/sched/core.c:8817
folio_wait_bit_common+0x394/0x9b0 mm/filemap.c:1296
__folio_lock mm/filemap.c:1659 [inline]
folio_lock include/linux/pagemap.h:938 [inline]
folio_lock include/linux/pagemap.h:934 [inline]
__filemap_get_folio+0xb71/0xd80 mm/filemap.c:1931
truncate_inode_pages_range+0x350/0xec0 mm/truncate.c:377
kill_bdev block/bdev.c:76 [inline]
blkdev_flush_mapping+0x140/0x2f0 block/bdev.c:662
blkdev_put_whole+0xd1/0xf0 block/bdev.c:693
blkdev_put+0x22a/0x770 block/bdev.c:953
blkdev_close+0x68/0x80 block/fops.c:492
__fput+0x27c/0xa90 fs/file_table.c:320
task_work_run+0x16f/0x270 kernel/task_work.c:179
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xaa8/0x28d0 kernel/exit.c:820
do_group_exit+0xd4/0x2a0 kernel/exit.c:950
get_signal+0x21b1/0x2440 kernel/signal.c:2858
arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe989925697
RSP: 002b:00007ffe5bcbbfb0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: 0000000000000008 RBX: 000055c481fd2b30 RCX: 00007fe989925697
RDX: 00000000000a0800 RSI: 000055c481fba150 RDI: 00000000ffffff9c
RBP: 000055c481fba150 R08: 0000000000000001 R09: 00007ffe5bde1080
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 000055c481fb5bf0 R14: 0000000000000001 R15: 000055c481fac910
</TASK>
INFO: task syz-executor112:5341 blocked for more than 143 seconds.
Not tainted 6.1.0-rc6-next-20221125-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor112 state:D stack:28448 pid:5341 ppid:5325 flags:0x00000004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0xb8a/0x5450 kernel/sched/core.c:6561
schedule+0xde/0x1b0 kernel/sched/core.c:6637
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6696
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa48/0x1360 kernel/locking/mutex.c:747
blkdev_get_by_dev.part.0+0x9b/0xb90 block/bdev.c:813
blkdev_get_by_dev+0x6f/0x90 block/bdev.c:856
blkdev_open+0x140/0x2c0 block/fops.c:478
do_dentry_open+0x6cc/0x13f0 fs/open.c:882
do_open fs/namei.c:3557 [inline]
path_openat+0x1bbc/0x2a50 fs/namei.c:3714
do_filp_open+0x1ba/0x410 fs/namei.c:3741
do_sys_openat2+0x16d/0x4c0 fs/open.c:1310
do_sys_open fs/open.c:1326 [inline]
__do_sys_openat fs/open.c:1342 [inline]
__se_sys_openat fs/open.c:1337 [inline]
__x64_sys_openat+0x143/0x1f0 fs/open.c:1337
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f8b63083c24
RSP: 002b:00007f8b63073e70 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8b63083c24
RDX: 0000000000000000 RSI: 00007f8b63073ef0 RDI: 00000000ffffff9c
RBP: 00007f8b63073ef0 R08: 0000000000000000 R09: 00007f8b63074700
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f8b631181a4 R14: 64626e2f7665642f R15: 0000000000022000
</TASK>
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8c78e4d0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8c78e1d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8c78f020 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x57/0x264 kernel/locking/lockdep.c:6494
2 locks held by getty/4971:
#0: ffff88802be34098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc900015962f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
1 lock held by udevd/5328:
#0: ffff88801e7eb4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xc0/0x770 block/bdev.c:911
1 lock held by syz-executor112/5341:
#0: ffff88801e7eb4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb90 block/bdev.c:813
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.0-rc6-next-20221125-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x333/0x3c0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xc75/0xfc0 kernel/hung_task.c:377
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5312 Comm: kworker/u4:2 Not tainted 6.1.0-rc6-next-20221125-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: 0x0 (events_unbound)
RIP: 0010:___update_load_sum kernel/sched/pelt.c:190 [inline]
RIP: 0010:update_rt_rq_load_avg+0x44/0x880 kernel/sched/pelt.c:348
Code: 48 89 f5 53 48 89 fb 48 8d be 40 0b 00 00 48 83 ec 28 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 54 06 00 00 48 8b 95 40 0b 00 00 <48> 89 d8 48 29 d0 0f 88 80 02 00 00 49 89 c5 49 c1 ed 0a 4d 85 ed
RSP: 0018:ffffc90003f2f9f8 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 000000c7f58d2e6c RCX: 0000000000000001
RDX: 000000c7f416e000 RSI: ffff8880b993b580 RDI: ffff8880b993c0c0
RBP: ffff8880b993b580 R08: ffff8880b993bfc8 R09: ffff8880b993c000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff8c119430 R14: ffff8880b993b580 R15: ffff88813ff37400
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005639dbf22680 CR3: 000000000c48e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__update_blocked_others kernel/sched/fair.c:8611 [inline]
update_blocked_averages+0x2ac/0x1dc0 kernel/sched/fair.c:8742
newidle_balance+0x4c2/0x11d0 kernel/sched/fair.c:11564
pick_next_task_fair+0x9a/0x12e0 kernel/sched/fair.c:7824
__pick_next_task kernel/sched/core.c:5871 [inline]
pick_next_task kernel/sched/core.c:5946 [inline]
__schedule+0x405/0x5450 kernel/sched/core.c:6525
schedule+0xde/0x1b0 kernel/sched/core.c:6637
worker_thread+0x160/0x1090 kernel/workqueue.c:2457
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>