binder: 2197:2207 ioctl 4018620d 200000c0 returned -22 binder: 2200:2206 ioctl 4018620d 200000c0 returned -22 binder: 2200:2211 ioctl 4018620d 200000c0 returned -22 binder: 2201:2210 ioctl 4018620d 200000c0 returned -22 binder: 2204:2208 ioctl 4018620d 200000c0 returned -22 INFO: task init:26692 blocked for more than 140 seconds. Not tainted 4.4.174+ #17 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D ffff8800b2757718 29280 26692 1 0x00000000 ffff8800b2757718 ffff8801d9ea0000 082133b3ec00416b ffff8801d9ea0000 0000000000000000 ffff8801d9ea0800 ffff8801db61f180 ffff8801db61f1a8 ffff8801db61e898 ffff8801d9ea2f80 ffff8801d9ea0000 ffffed00164ea001 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/26692: #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: 20 Comm: khungtaskd Not tainted 4.4.174+ #17 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:ffff8801db600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000080e3608 CR3: 00000001d16d3000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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 NMI backtrace for cpu 1 CPU: 1 PID: 2248 Comm: syz-executor698 Not tainted 4.4.174+ #17 task: ffff8801d1414740 task.stack: ffff8801d1758000 RIP: 0010:[] [] delay_tsc+0x33/0xc0 arch/x86/lib/delay.c:67 RSP: 0018:ffff8801d175f6c8 EFLAGS: 00000002 RAX: 0000000000000002 RBX: 000002ef54ba83fd RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffffff81b0abec RDI: 0000000000000001 RBP: ffff8801d175f6e8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: ffffffff83fdf1a6 R12: 000002ef54ba7bb9 R13: 0000000000000001 R14: 00000000000008fd R15: fffffbfff092dca5 FS: 0000000000000000(0000) GS:ffff8801db700000(0063) knlGS:00000000f77deb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000009c07194 CR3: 00000001d1903000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffffffff8496e4e0 000000000000270a 0000000000000020 fffffbfff092dce3 ffff8801d175f6f8 ffffffff81ad8d30 ffff8801d175f708 ffffffff81ad8d6a ffff8801d175f758 ffffffff81cc45ff ffffed003a2ebf01 ffffffff8496e528 Call Trace: [] __delay+0x10/0x20 arch/x86/lib/delay.c:160 [] __const_udelay+0x2a/0x30 arch/x86/lib/delay.c:174 [] wait_for_xmitr+0x6f/0x1e0 drivers/tty/serial/8250/8250_port.c:1725 [] serial8250_console_putchar+0x20/0x60 drivers/tty/serial/8250/8250_port.c:2806 [] uart_console_write+0x56/0xe0 drivers/tty/serial/serial_core.c:1789 [] serial8250_console_write+0x2fb/0x870 drivers/tty/serial/8250/8250_port.c:2872 [] univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:594 [] call_console_drivers.constprop.0+0x1ef/0x3f0 kernel/printk/printk.c:1468 [] console_unlock kernel/printk/printk.c:2335 [inline] [] console_unlock+0x602/0xa10 kernel/printk/printk.c:2242 [] vprintk_emit+0x3b2/0x820 kernel/printk/printk.c:1837 [] vprintk+0x28/0x30 kernel/printk/printk.c:1848 [] printk+0xc2/0xf5 kernel/printk/printk.c:1927 [] binder_ioctl.cold+0x179/0x305 drivers/android/binder.c:4896 [] C_SYSC_ioctl fs/compat_ioctl.c:1592 [inline] [] compat_SyS_ioctl+0x403/0x2210 fs/compat_ioctl.c:1544 [] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline] [] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397 [] sysenter_flags_fixed+0xd/0x1a Code: fe bf 01 00 00 00 41 55 41 54 53 e8 28 45 68 ff e8 a3 1f 03 00 41 89 c5 0f ae e8 0f 31 48 c1 e2 20 48 09 c2 49 89 d4 eb 16 f3 90 01 00 00 00 e8 03 45 68 ff e8 7e 1f 03 00 44 39 e8 75 36 0f