binder: 9218:9285 ioctl 80000001 200001c0 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: 9218:9235 ioctl 40046207 0 returned -16
binder: 9218:9290 ioctl 80000001 200001c0 returned -22
INFO: rcu_sched self-detected stall on CPU
	0-....: (124999 ticks this GP) idle=cc2/1/4611686018427387906 softirq=30860/30860 fqs=31227 
	 (t=125000 jiffies g=17120 c=17119 q=666)
NMI backtrace for cpu 0
CPU: 0 PID: 9286 Comm: syz-executor4 Not tainted 4.18.0-rc1+ #114
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103
 nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:156 [inline]
 rcu_dump_cpu_stacks+0x175/0x1c2 kernel/rcu/tree.c:1336
 print_cpu_stall kernel/rcu/tree.c:1485 [inline]
 check_cpu_stall.isra.60.cold.78+0x36c/0x5a6 kernel/rcu/tree.c:1553
 __rcu_pending kernel/rcu/tree.c:3244 [inline]
 rcu_pending kernel/rcu/tree.c:3291 [inline]
 rcu_check_callbacks+0x23f/0xcd0 kernel/rcu/tree.c:2646
 update_process_times+0x2d/0x70 kernel/time/timer.c:1636
 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164
 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274
 __run_hrtimer kernel/time/hrtimer.c:1398 [inline]
 __hrtimer_run_queues+0x3eb/0x10c0 kernel/time/hrtimer.c:1460
 hrtimer_interrupt+0x2f3/0x750 kernel/time/hrtimer.c:1518
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
 smp_apic_timer_interrupt+0x165/0x730 arch/x86/kernel/apic/apic.c:1050
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863
 </IRQ>
RIP: 0010:__process_echoes+0x258/0x8d0 drivers/tty/n_tty.c:736
Code: 85 02 06 00 00 47 0f b6 b4 34 60 12 00 00 bf 82 ff ff ff 44 89 f6 e8 b7 bf d7 fd 41 80 fe 82 0f 84 4f 05 00 00 e8 d8 be d7 fd <4c> 8d 73 02 4c 89 f3 e8 cc be d7 fd 4d 89 ee bf df 0e 00 00 49 29 
RSP: 0018:ffff8801681a77c0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000040000 RBX: 0000000299a40e56 RCX: ffffc90004628000
RDX: 0000000000040000 RSI: ffffffff83a45068 RDI: 0000000000000001
RBP: ffff8801681a7828 R08: ffff8801660b4240 R09: 0000000000000006
R10: ffff8801660b4240 R11: 0000000000000000 R12: ffffc90001c24000
R13: 0000000000000021 R14: 0000000000000000 R15: 00000000000000ff
 flush_echoes drivers/tty/n_tty.c:799 [inline]
 __receive_buf drivers/tty/n_tty.c:1615 [inline]
 n_tty_receive_buf_common+0x11dd/0x2c60 drivers/tty/n_tty.c:1709
 n_tty_receive_buf+0x30/0x40 drivers/tty/n_tty.c:1738
 tiocsti drivers/tty/tty_io.c:2180 [inline]
 tty_ioctl+0x7e7/0x1870 drivers/tty/tty_io.c:2566
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:684
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701
 __do_sys_ioctl fs/ioctl.c:708 [inline]
 __se_sys_ioctl fs/ioctl.c:706 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455a99
Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007f7c8e236c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7c8e2376d4 RCX: 0000000000455a99
RDX: 0000000020000000 RSI: 0000000000005412 RDI: 0000000000000017
RBP: 000000000072bff0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004be97b R14: 00000000004cd6c8 R15: 0000000000000002