INFO: task syz-executor.1:8099 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:23880 pid: 8099 ppid: 1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:178
__loop_clr_fd+0x1ae/0x1070 drivers/block/loop.c:1122
lo_release+0x1ac/0x1f0 drivers/block/loop.c:1761
blkdev_put_whole block/bdev.c:694 [inline]
blkdev_put+0x2fb/0x9e0 block/bdev.c:956
deactivate_locked_super+0x94/0x160 fs/super.c:335
deactivate_super+0xad/0xd0 fs/super.c:366
cleanup_mnt+0x3a2/0x540 fs/namespace.c:1137
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fe980ae4f57
RSP: 002b:00007ffe7484ea88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fe980ae4f57
RDX: 00007ffe7484eb5b RSI: 000000000000000a RDI: 00007ffe7484eb50
RBP: 00007ffe7484eb50 R08: 00000000ffffffff R09: 00007ffe7484e920
R10: 0000555557344873 R11: 0000000000000246 R12: 00007fe980b3d105
R13: 00007ffe7484fc10 R14: 0000555557344810 R15: 00007ffe7484fc50
INFO: task systemd-udevd:18352 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:systemd-udevd state:D stack:27656 pid:18352 ppid: 2971 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:859
blkdev_open+0x154/0x2e0 block/fops.c:501
do_dentry_open+0x4c8/0x1250 fs/open.c:822
do_open fs/namei.c:3426 [inline]
path_openat+0x1cad/0x2750 fs/namei.c:3559
do_filp_open+0x1aa/0x400 fs/namei.c:3586
do_sys_openat2+0x16d/0x4d0 fs/open.c:1212
do_sys_open fs/open.c:1228 [inline]
__do_sys_open fs/open.c:1236 [inline]
__se_sys_open fs/open.c:1232 [inline]
__x64_sys_open+0x119/0x1c0 fs/open.c:1232
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+0x44/0xae
RIP: 0033:0x7f4d242ee840
RSP: 002b:00007ffdca9a7628 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000055b2c931e120 RCX: 00007f4d242ee840
RDX: 000055b2c88cefe3 RSI: 00000000000a0800 RDI: 000055b2c931a430
RBP: 00007ffdca9a77a0 R08: 000055b2c88ce670 R09: 0000000000000010
R10: 000055b2c88ced0c R11: 0000000000000246 R12: 00007ffdca9a76f0
R13: 000055b2c930c7d0 R14: 0000000000000003 R15: 000000000000000e
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb80fe0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by kworker/u4:2/50:
1 lock held by in:imklog/6227:
#0: ffff88801e9f73f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
2 locks held by syz-executor.1/8099:
#0: ffff88801ac70118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x97/0x9e0 block/bdev.c:914
#1: ffff888147431b60 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x7a/0x1070 drivers/block/loop.c:1106
1 lock held by systemd-udevd/18352:
#0: ffff88801ac70118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
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 drivers/acpi/processor_idle.c:109 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_idle_do_entry+0x1c6/0x250 drivers/acpi/processor_idle.c:553