INFO: task syz-executor3:13545 blocked for more than 140 seconds. Not tainted 4.19.0-rc7+ #58 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D23568 13545 5914 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3575 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 evdev_close_device drivers/input/evdev.c:447 [inline] evdev_release+0xfe/0x1e0 drivers/input/evdev.c:488 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x410ff1 Code: 30 48 89 4c 24 10 e8 8e 09 00 00 48 8b 44 24 28 48 89 04 24 48 8b 44 24 30 48 89 44 24 08 e8 36 5d 04 00 48 8b 6c 24 18 48 83 20 c3 cc cc cc cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff RSP: 002b:00007ffeeef3db80 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000410ff1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffeeef3dab0 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 00000000000000e5 R15: 0000000000000003 INFO: task syz-executor0:13551 blocked for more than 140 seconds. Not tainted 4.19.0-rc7+ #58 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D23568 13551 5915 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3575 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 evdev_close_device drivers/input/evdev.c:447 [inline] evdev_release+0xfe/0x1e0 drivers/input/evdev.c:488 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x410ff1 Code: 30 48 89 4c 24 10 e8 8e 09 00 00 48 8b 44 24 28 48 89 04 24 48 8b 44 24 30 48 89 44 24 08 e8 36 5d 04 00 48 8b 6c 24 18 48 83 20 c3 cc cc cc cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff RSP: 002b:00007ffecb8bd850 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000410ff1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffecb8bd780 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 00000000000000f4 R15: 0000000000000000 INFO: task syz-executor4:13555 blocked for more than 140 seconds. Not tainted 4.19.0-rc7+ #58 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D23000 13555 5921 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3575 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 evdev_close_device drivers/input/evdev.c:447 [inline] evdev_release+0xfe/0x1e0 drivers/input/evdev.c:488 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x410ff1 Code: 30 48 89 4c 24 10 e8 8e 09 00 00 48 8b 44 24 28 48 89 04 24 48 8b 44 24 30 48 89 44 24 08 e8 36 5d 04 00 48 8b 6c 24 18 48 83 20 c3 cc cc cc cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff RSP: 002b:00007ffc672af380 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000410ff1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffc672af2b0 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 00000000000000e8 R15: 0000000000000004 INFO: task syz-executor2:13558 blocked for more than 140 seconds. Not tainted 4.19.0-rc7+ #58 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D22432 13558 5922 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3575 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 evdev_close_device drivers/input/evdev.c:447 [inline] evdev_release+0xfe/0x1e0 drivers/input/evdev.c:488 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x410ff1 Code: 30 48 89 4c 24 10 e8 8e 09 00 00 48 8b 44 24 28 48 89 04 24 48 8b 44 24 30 48 89 44 24 08 e8 36 5d 04 00 48 8b 6c 24 18 48 83 20 c3 cc cc cc cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff RSP: 002b:00007ffe1f1c4680 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000410ff1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffe1f1c45b0 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 00000000000000ef R15: 0000000000000002 INFO: task syz-executor5:13570 blocked for more than 140 seconds. Not tainted 4.19.0-rc7+ #58 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D23480 13570 5917 0x00000006 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3575 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 evdev_close_device drivers/input/evdev.c:447 [inline] evdev_release+0xfe/0x1e0 drivers/input/evdev.c:488 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 get_signal+0x155e/0x1980 kernel/signal.c:2343 do_signal+0x9c/0x21e0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x410ff1 Code: 30 48 89 4c 24 10 e8 8e 09 00 00 48 8b 44 24 28 48 89 04 24 48 8b 44 24 30 48 89 44 24 08 e8 36 5d 04 00 48 8b 6c 24 18 48 83 20 c3 cc cc cc cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff RSP: 002b:00007ffecc8edfb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000410ff1 RDX: 0000000000000000 RSI: 0000000000730488 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffecc8edee0 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 00000000000000ed R15: 0000000000000005 INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 981 Comm: khungtaskd Not tainted 4.19.0-rc7+ #58 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.3+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x1ed lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0xb3e/0x1050 kernel/hung_task.c:265 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:57