ubi0: max/mean erase counter: 1/1, WL threshold: 4096, image sequence number: 806427054 ubi0: available PEBs: 28, total reserved PEBs: 4, PEBs reserved for bad PEB handling: 0 ubi0: background thread "ubi_bgt0d" started, PID 2477 ubi0: detaching mtd0 INFO: task syz-executor.4:2446 blocked for more than 140 seconds. Not tainted 4.14.184-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D30048 2446 6357 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x8a6/0x1d70 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x86c/0xe50 kernel/time/timer.c:1723 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 kthread_stop+0xce/0x640 kernel/kthread.c:530 ubi_detach_mtd_dev+0x1e3/0x3cc drivers/mtd/ubi/build.c:1084 ctrl_cdev_ioctl+0x14b/0x220 drivers/mtd/ubi/cdev.c:1040 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45ca59 RSP: 002b:00007f3a90099c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1620 RCX: 000000000045ca59 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000020e R14: 00000000004c4557 R15: 00007f3a9009a6d4 INFO: task syz-executor.4:2452 blocked for more than 140 seconds. Not tainted 4.14.184-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D30080 2452 6357 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x8a6/0x1d70 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x5f0/0x1430 kernel/locking/mutex.c:893 ctrl_cdev_ioctl+0x190/0x220 drivers/mtd/ubi/cdev.c:1014 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45ca59 RSP: 002b:00007f3a90078c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1620 RCX: 000000000045ca59 RDX: 000000000076006e RSI: 0000000040186f40 RDI: 0000000000000004 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000020e R14: 00000000004c4557 R15: 00007f3a900796d4 INFO: task syz-executor.5:2451 blocked for more than 140 seconds. Not tainted 4.14.184-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D30080 2451 24374 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x8a6/0x1d70 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x5f0/0x1430 kernel/locking/mutex.c:893 ctrl_cdev_ioctl+0x142/0x220 drivers/mtd/ubi/cdev.c:1039 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45ca59 RSP: 002b:00007fc67e41ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1620 RCX: 000000000045ca59 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000004 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000020e R14: 00000000004c4557 R15: 00007fc67e41b6d4 INFO: task syz-executor.5:2457 blocked for more than 140 seconds. Not tainted 4.14.184-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28592 2457 24374 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x8a6/0x1d70 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x5f0/0x1430 kernel/locking/mutex.c:893 ctrl_cdev_ioctl+0x190/0x220 drivers/mtd/ubi/cdev.c:1014 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45ca59 RSP: 002b:00007fc67e3f9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1620 RCX: 000000000045ca59 RDX: 000000000076006e RSI: 0000000040186f40 RDI: 0000000000000006 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000020e R14: 00000000004c4557 R15: 00007fc67e3fa6d4 INFO: task syz-executor.0:2464 blocked for more than 140 seconds. Not tainted 4.14.184-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D30080 2464 6356 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x8a6/0x1d70 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x5f0/0x1430 kernel/locking/mutex.c:893 ctrl_cdev_ioctl+0x142/0x220 drivers/mtd/ubi/cdev.c:1039 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45ca59 RSP: 002b:00007f2bbd1a0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1620 RCX: 000000000045ca59 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000004 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000020e R14: 00000000004c4557 R15: 00007f2bbd1a16d4 INFO: task syz-executor.1:2465 blocked for more than 140 seconds. Not tainted 4.14.184-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D30080 2465 6359 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x8a6/0x1d70 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x5f0/0x1430 kernel/locking/mutex.c:893 ctrl_cdev_ioctl+0x142/0x220 drivers/mtd/ubi/cdev.c:1039 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45ca59 RSP: 002b:00007fde903fec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1620 RCX: 000000000045ca59 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000004 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000020e R14: 00000000004c4557 R15: 00007fde903ff6d4 INFO: task syz-executor.2:2474 blocked for more than 140 seconds. Not tainted 4.14.184-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28992 2474 6358 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x8a6/0x1d70 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x5f0/0x1430 kernel/locking/mutex.c:893 ctrl_cdev_ioctl+0x142/0x220 drivers/mtd/ubi/cdev.c:1039 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45ca59 RSP: 002b:00007efcb6a51c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1620 RCX: 000000000045ca59 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000005 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000020e R14: 00000000004c4557 R15: 00007efcb6a526d4 INFO: task syz-executor.2:2478 blocked for more than 140 seconds. Not tainted 4.14.184-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D29200 2478 6358 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x8a6/0x1d70 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x5f0/0x1430 kernel/locking/mutex.c:893 ctrl_cdev_ioctl+0x190/0x220 drivers/mtd/ubi/cdev.c:1014 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45ca59 RSP: 002b:00007efcb6a30c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1620 RCX: 000000000045ca59 RDX: 000000000076006e RSI: 0000000040186f40 RDI: 0000000000000007 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000020e R14: 00000000004c4557 R15: 00007efcb6a316d4 INFO: task syz-executor.3:2483 blocked for more than 140 seconds. Not tainted 4.14.184-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28992 2483 6360 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x8a6/0x1d70 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x5f0/0x1430 kernel/locking/mutex.c:893 ctrl_cdev_ioctl+0x142/0x220 drivers/mtd/ubi/cdev.c:1039 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45ca59 RSP: 002b:00007fd5df2dcc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1620 RCX: 000000000045ca59 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000005 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000020e R14: 00000000004c4557 R15: 00007fd5df2dd6d4 INFO: task syz-executor.3:2486 blocked for more than 140 seconds. Not tainted 4.14.184-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28960 2486 6360 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x8a6/0x1d70 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x5f0/0x1430 kernel/locking/mutex.c:893 ctrl_cdev_ioctl+0x190/0x220 drivers/mtd/ubi/cdev.c:1014 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45ca59 RSP: 002b:00007fd5df2bbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1620 RCX: 000000000045ca59 RDX: 000000000076006e RSI: 0000000040186f40 RDI: 0000000000000007 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000020e R14: 00000000004c4557 R15: 00007fd5df2bc6d4 Showing all locks held in the system: 1 lock held by khungtaskd/1056: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 1 lock held by in:imklog/6017: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xa6/0xc0 fs/file.c:769 1 lock held by syz-executor.4/2446: #0: (ubi_devices_mutex){+.+.}, at: [] ctrl_cdev_ioctl+0x142/0x220 drivers/mtd/ubi/cdev.c:1039 1 lock held by syz-executor.4/2452: #0: (ubi_devices_mutex){+.+.}, at: [] ctrl_cdev_ioctl+0x190/0x220 drivers/mtd/ubi/cdev.c:1014 1 lock held by syz-executor.5/2451: #0: (ubi_devices_mutex){+.+.}, at: [] ctrl_cdev_ioctl+0x142/0x220 drivers/mtd/ubi/cdev.c:1039 1 lock held by syz-executor.5/2457: #0: (ubi_devices_mutex){+.+.}, at: [] ctrl_cdev_ioctl+0x190/0x220 drivers/mtd/ubi/cdev.c:1014 1 lock held by syz-executor.0/2464: #0: (ubi_devices_mutex){+.+.}, at: [] ctrl_cdev_ioctl+0x142/0x220 drivers/mtd/ubi/cdev.c:1039 1 lock held by syz-executor.1/2465: #0: (ubi_devices_mutex){+.+.}, at: [] ctrl_cdev_ioctl+0x142/0x220 drivers/mtd/ubi/cdev.c:1039 1 lock held by syz-executor.2/2474: #0: (ubi_devices_mutex){+.+.}, at: [] ctrl_cdev_ioctl+0x142/0x220 drivers/mtd/ubi/cdev.c:1039 1 lock held by syz-executor.2/2478: #0: (ubi_devices_mutex){+.+.}, at: [] ctrl_cdev_ioctl+0x190/0x220 drivers/mtd/ubi/cdev.c:1014 1 lock held by syz-executor.3/2483: #0: (ubi_devices_mutex){+.+.}, at: [] ctrl_cdev_ioctl+0x142/0x220 drivers/mtd/ubi/cdev.c:1039 1 lock held by syz-executor.3/2486: #0: (ubi_devices_mutex){+.+.}, at: [] ctrl_cdev_ioctl+0x190/0x220 drivers/mtd/ubi/cdev.c:1014 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1056 Comm: khungtaskd Not tainted 4.14.184-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x283 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x17f lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5e2/0xb80 kernel/hung_task.c:274 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 6023 Comm: rs:main Q:Reg Not tainted 4.14.184-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a04aa5c0 task.stack: ffff888089740000 RIP: 0010:__sanitizer_cov_trace_pc+0x15/0x50 kernel/kcov.c:65 RSP: 0018:ffff8880897478c0 EFLAGS: 00000086 RAX: ffff8880a04aa5c0 RBX: ffff8880aec2b580 RCX: 1ffffffff0fe794c RDX: 0000000080000003 RSI: ffff8880a04aae70 RDI: ffff8880a04aae44 RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000a0012 R10: ffff8880a04aae70 R11: ffff8880a04aa5c0 R12: 0000000000000000 R13: ffff8880aec2b580 R14: ffff8880897479b0 R15: ffff8880a04aa5c0 FS: 00007fad29090700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fad20022000 CR3: 00000000a5ec8000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_smp_processor_id+0x5/0x20 lib/smp_processor_id.c:57 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:360 [inline] rcu_is_watching+0x11/0xb0 kernel/rcu/tree.c:1130 rcu_read_lock include/linux/rcupdate.h:630 [inline] __update_idle_core+0x30b/0x3e0 kernel/sched/fair.c:5685 update_idle_core kernel/sched/sched.h:838 [inline] pick_next_task_idle+0x8f/0xf0 kernel/sched/idle_task.c:31 pick_next_task kernel/sched/core.c:3238 [inline] __schedule+0x14ac/0x1d70 kernel/sched/core.c:3357 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 freezable_schedule include/linux/freezer.h:172 [inline] futex_wait_queue_me+0x2e0/0x590 kernel/futex.c:2722 futex_wait+0x1ba/0x540 kernel/futex.c:2837 do_futex+0x129/0x1850 kernel/futex.c:3920 SYSC_futex kernel/futex.c:3980 [inline] SyS_futex+0x1e8/0x2d0 kernel/futex.c:3948 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7fad2bad117f RSP: 002b:00007fad2908fc70 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fad2bad117f RDX: 0000000000004aa9 RSI: 0000000000000080 RDI: 000055d27d0f628c RBP: 000055d27d0f6288 R08: 000055d27d0f6000 R09: 0000000000002554 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fad2908fcd0 R13: 0000000000000000 R14: 000055d27b7c5290 R15: 0000000000000000 Code: e8 9c de ee ff 48 c7 05 26 f2 dd 08 00 00 00 00 e9 be ed ff ff 90 65 48 8b 04 25 40 ee 01 00 48 85 c0 74 1a 65 8b 15 db 47 a7 7e <81> e2 00 01 1f 00 75 0b 8b 90 58 13 00 00 83 fa 01 74 01 c3 48