netlink: 'syz-executor7': attribute type 16 has an invalid length. netlink: 1 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 'syz-executor7': attribute type 16 has an invalid length. netlink: 1 bytes leftover after parsing attributes in process `syz-executor7'. INFO: rcu_sched self-detected stall on CPU 0-....: (1 GPs behind) idle=f22/1/4611686018427387906 softirq=24084/24085 fqs=31231 (t=125000 jiffies g=12417 c=12416 q=2323) NMI backtrace for cpu 0 CPU: 0 PID: 8357 Comm: syz-executor1 Not tainted 4.16.0-rc7+ #7 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+0x194/0x24d lib/dump_stack.c:53 nmi_cpu_backtrace+0x1d2/0x210 lib/nmi_backtrace.c:103 nmi_trigger_cpumask_backtrace+0x123/0x180 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+0x186/0x1de kernel/rcu/tree.c:1375 print_cpu_stall kernel/rcu/tree.c:1524 [inline] check_cpu_stall.isra.61+0xbb8/0x15b0 kernel/rcu/tree.c:1592 __rcu_pending kernel/rcu/tree.c:3361 [inline] rcu_pending kernel/rcu/tree.c:3423 [inline] rcu_check_callbacks+0x238/0xd20 kernel/rcu/tree.c:2763 update_process_times+0x30/0x60 kernel/time/timer.c:1636 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:162 tick_sched_timer+0x42/0x120 kernel/time/tick-sched.c:1194 __run_hrtimer kernel/time/hrtimer.c:1349 [inline] __hrtimer_run_queues+0x39c/0xec0 kernel/time/hrtimer.c:1411 hrtimer_interrupt+0x2a5/0x6f0 kernel/time/hrtimer.c:1469 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline] smp_apic_timer_interrupt+0x14a/0x700 arch/x86/kernel/apic/apic.c:1050 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:857 RIP: 0010:echo_buf drivers/tty/n_tty.c:144 [inline] RIP: 0010:__process_echoes+0x5eb/0x770 drivers/tty/n_tty.c:732 RSP: 0018:ffff88017555f7f0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff12 RAX: 0000000000000590 RBX: ffffc90012a5b000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffc90003ed0000 RDI: ffffc90012a5c7f0 RBP: ffff88017555f858 R08: 1ffff1002eaabea4 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 000000050daf4590 R13: dffffc0000000000 R14: 000000050daf4590 R15: 0000000000000407 flush_echoes drivers/tty/n_tty.c:799 [inline] __receive_buf drivers/tty/n_tty.c:1615 [inline] n_tty_receive_buf_common+0x1380/0x2520 drivers/tty/n_tty.c:1709 n_tty_receive_buf+0x30/0x40 drivers/tty/n_tty.c:1738 tiocsti drivers/tty/tty_io.c:2171 [inline] tty_ioctl+0x9c5/0x1610 drivers/tty/tty_io.c:2557 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x454e79 RSP: 002b:00007f07d028bc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f07d028c6d4 RCX: 0000000000454e79 RDX: 00000000200000c0 RSI: 0000000000005412 RDI: 0000000000000014 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000002f9 R14: 00000000006f67f8 R15: 0000000000000000