binder: undelivered death notification, 0000000000000000 binder: release 16752:16757 transaction 17915 out, still active binder: unexpected work type, 4, not freed binder: undelivered TRANSACTION_COMPLETE binder: send failed reply for transaction 17915, target dead INFO: task init:14254 blocked for more than 140 seconds. Not tainted 4.4.174+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D ffff8801d5a2f718 29280 14254 1 0x00000000 ffff8801d5a2f718 ffff8801d7630000 18b6d4f9f16bd924 ffff8801d7630000 0000000000000000 ffff8801d7630800 ffff8801db71f180 ffff8801db71f1a8 ffff8801db71e898 ffff8800a09e8000 ffff8801d7630000 ffffed003ab45001 Call Trace: [] schedule+0x99/0x1d0 kernel/sched/core.c:3355 [] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3388 [] __mutex_lock_common kernel/locking/mutex.c:582 [inline] [] mutex_lock_nested+0x3c2/0xb80 kernel/locking/mutex.c:621 [] tty_open+0x56a/0xf50 drivers/tty/tty_io.c:2067 [] chrdev_open+0x230/0x630 fs/char_dev.c:388 [] do_dentry_open+0x38f/0xbd0 fs/open.c:749 [] vfs_open+0x10b/0x210 fs/open.c:862 [] do_last fs/namei.c:3269 [inline] [] path_openat+0x136f/0x4470 fs/namei.c:3406 [] do_filp_open+0x1a1/0x270 fs/namei.c:3440 [] do_sys_open+0x2f8/0x600 fs/open.c:1038 [] SYSC_open fs/open.c:1056 [inline] [] SyS_open+0x2d/0x40 fs/open.c:1051 [] entry_SYSCALL_64_fastpath+0x1e/0x9a 1 lock held by init/14254: #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x56a/0xf50 drivers/tty/tty_io.c:2067 Sending NMI to all CPUs: NMI backtrace for cpu 0 CPU: 0 PID: 2126 Comm: syz-executor.2 Not tainted 4.4.174+ #4 task: ffff8801d596af80 task.stack: ffff8800b7338000 RIP: 0010:[] [] __lock_acquire+0x7f1/0x4f50 kernel/locking/lockdep.c:3156 RSP: 0018:ffff8800b733f9c0 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: 000000000000001d RCX: 1ffff1003ab2d712 RDX: 1ffff1003ab2d710 RSI: 0000000000000001 RDI: ffff8801d596b880 RBP: ffff8800b733fb38 R08: 0000000000000001 R09: 1ffff1003ab2d70d R10: ffffffff82836880 R11: 0000000000000000 R12: ffff8801d596af80 R13: ffff8801d596b870 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000d2d940(0063) GS:ffff8801db600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000710934 CR3: 00000000a6c3e000 CR4: 00000000001606b0 Stack: ffff8801d596af80 ffffffff82ea73a0 0000000000000000 0000000000000000 0000000000000002 ffff8800b733fa68 0000000000000246 ffff8800b733fa38 ffff8801d596b840 ffff8801d596b840 ffff8801d596b890 0000000000000000 Call Trace: [] lock_acquire+0x15e/0x450 kernel/locking/lockdep.c:3592 [] rcu_lock_acquire include/linux/rcupdate.h:477 [inline] [] rcu_read_lock include/linux/rcupdate.h:861 [inline] [] task_has_perm+0x4a/0x330 security/selinux/hooks.c:1521 [] selinux_task_wait+0x24/0x30 security/selinux/hooks.c:3763 [] security_task_wait+0x73/0xb0 security/security.c:993 [] wait_consider_task+0x28b/0x35b0 kernel/exit.c:1334 [] do_wait_thread kernel/exit.c:1447 [inline] [] do_wait+0x350/0xa00 kernel/exit.c:1518 [] SYSC_wait4 kernel/exit.c:1649 [inline] [] SyS_wait4+0x144/0x210 kernel/exit.c:1614 [] entry_SYSCALL_64_fastpath+0x1e/0x9a Code: 85 31 00 00 48 8b 45 18 49 8d 7d 10 48 89 fa 48 c1 ea 03 49 89 45 08 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 78 31 00 00 <48> 8b 84 24 88 00 00 00 49 89 45 10 49 8d 45 18 48 89 c2 48 89 NMI backtrace for cpu 1 CPU: 1 PID: 20 Comm: khungtaskd Not tainted 4.4.174+ #4 task: ffff8801da6f4740 task.stack: ffff8800001d0000 RIP: 0010:[] [] _flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:62 [inline] RIP: 0010:[] [] flat_send_IPI_mask+0xf7/0x1b0 arch/x86/kernel/apic/apic_flat_64.c:69 RSP: 0018:ffff8800001d7c88 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000c00 RCX: 0000000000000000 RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fc300 RBP: ffff8800001d7cb8 R08: 0000000000000018 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246 R13: 0000000003000000 R14: ffffffff82e5f2e0 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fec766bb460 CR3: 00000000b4e30000 CR4: 00000000001606b0 Stack: 0000000000000001 ffffffff82e5f2e0 ffffffff831a6ac0 fffffbfff0634c34 000000000001b6c0 0000000000000008 ffff8800001d7cd8 ffffffff81092bee 0000000000000008 ffffffff82924260 ffff8800001d7d30 ffffffff81ab8252 Call Trace: [] nmi_raise_cpu_backtrace+0x5e/0x80 arch/x86/kernel/apic/hw_nmi.c:33 [] nmi_trigger_all_cpu_backtrace.cold+0xa1/0xae lib/nmi_backtrace.c:85 [] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 [] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline] [] check_hung_task kernel/hung_task.c:125 [inline] [] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline] [] watchdog.cold+0xd3/0xee kernel/hung_task.c:238 [] kthread+0x273/0x310 kernel/kthread.c:211 [] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:537 Code: 00 c3 5f ff 80 e6 10 75 e1 41 c1 e5 18 44 89 2c 25 10 c3 5f ff 44 89 fa 09 da 80 cf 04 41 83 ff 02 0f 44 d3 89 14 25 00 c3 5f ff <41> f7 c4 00 02 00 00 75 1e 4c 89 e7 57 9d 0f 1f 44 00 00 e8 f1