INFO: task udevd:5159 blocked for more than 143 seconds.
Not tainted 6.3.0-rc6-next-20230414-syzkaller-12018-gd3f2cd248191 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:26480 pid:5159 ppid:4443 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5334 [inline]
__schedule+0x1d23/0x5650 kernel/sched/core.c:6659
schedule+0xde/0x1a0 kernel/sched/core.c:6735
io_schedule+0xbe/0x130 kernel/sched/core.c:8969
folio_wait_bit_common+0x394/0x9b0 mm/filemap.c:1301
__folio_lock mm/filemap.c:1664 [inline]
folio_lock include/linux/pagemap.h:955 [inline]
folio_lock include/linux/pagemap.h:951 [inline]
__filemap_get_folio+0x789/0x990 mm/filemap.c:1931
truncate_inode_pages_range+0x350/0xf10 mm/truncate.c:394
kill_bdev block/bdev.c:76 [inline]
blkdev_flush_mapping+0x140/0x310 block/bdev.c:584
blkdev_put_whole+0xd1/0xf0 block/bdev.c:615
blkdev_put+0x224/0x770 block/bdev.c:875
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
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xb0d/0x29f0 kernel/exit.c:871
do_group_exit+0xd4/0x2a0 kernel/exit.c:1021
get_signal+0x2315/0x25b0 kernel/signal.c:2859
arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:307
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x1d/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: 0033:0x7fd83c125697
RSP: 002b:00007ffd016a7cc0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: 0000000000000008 RBX: 000055719e29dd90 RCX: 00007fd83c125697
RDX: 00000000000a0800 RSI: 000055719e26b680 RDI: 00000000ffffff9c
RBP: 000055719e26b680 R08: 0000000000000001 R09: 00007ffd017d9080
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 000055719e2847d0 R14: 0000000000000001 R15: 000055719e26a910
INFO: task syz-executor.0:5215 blocked for more than 143 seconds.
Not tainted 6.3.0-rc6-next-20230414-syzkaller-12018-gd3f2cd248191 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28456 pid:5215 ppid:5194 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5334 [inline]
__schedule+0x1d23/0x5650 kernel/sched/core.c:6659
schedule+0xde/0x1a0 kernel/sched/core.c:6735
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6794
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747
blkdev_get_by_dev.part.0+0x9b/0xb80 block/bdev.c:735
blkdev_get_by_dev+0x6f/0x90 block/bdev.c:778
blkdev_open+0x140/0x2c0 block/fops.c:493
do_dentry_open+0x6cc/0x13f0 fs/open.c:920
do_open fs/namei.c:3560 [inline]
path_openat+0x1baa/0x2750 fs/namei.c:3715
do_filp_open+0x1ba/0x410 fs/namei.c:3742
do_sys_openat2+0x16d/0x4c0 fs/open.c:1356
do_sys_open fs/open.c:1372 [inline]
__do_sys_openat fs/open.c:1388 [inline]
__se_sys_openat fs/open.c:1383 [inline]
__x64_sys_openat+0x143/0x1f0 fs/open.c:1383
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: 0033:0x418484
RSP: 002b:00007fd253da2cc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000418484
RDX: 0000000000000000 RSI: 00007fd253da2d60 RDI: 00000000ffffff9c
RBP: 00007fd253da2d60 R08: 0000000000000000 R09: 002364626e2f7665
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fffeb00ff3f R14: 00007fd253da3300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8c796bb0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8c7968b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/28:
#0: ffffffff8c7977c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x390 kernel/locking/lockdep.c:6545
2 locks held by getty/4762:
#0: ffff888149f73098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2176
1 lock held by udevd/5159:
#0: ffff888146ad44c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xc0/0x770 block/bdev.c:833
1 lock held by syz-executor.0/5215:
#0: ffff888146ad44c8 (&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-rc6-next-20230414-syzkaller-12018-gd3f2cd248191 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
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 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x40/0x50 drivers/acpi/processor_idle.c:112