netlink: 20 bytes leftover after parsing attributes in process `syz-executor.5'.
netlink: 20 bytes leftover after parsing attributes in process `syz-executor.0'.
netlink: 20 bytes leftover after parsing attributes in process `syz-executor.5'.
INFO: rcu_preempt self-detected stall on CPU
	0-...: (1 GPs behind) idle=e6e/140000000000002/0 softirq=57935/57936 fqs=207 
	 (t=10500 jiffies g=16265 c=16264 q=775)
rcu_preempt kthread starved for 10055 jiffies! g16265 c16264 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1
rcu_preempt     R  running task    29720     8      2 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384
 schedule+0x92/0x1c0 kernel/sched/core.c:3428
 schedule_timeout+0x43e/0xe10 kernel/time/timer.c:1746
 rcu_gp_kthread+0xbf4/0x1ec0 kernel/rcu/tree.c:2255
 kthread+0x319/0x430 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
NMI backtrace for cpu 0
CPU: 0 PID: 26020 Comm: syz-executor.1 Not tainted 4.14.171-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x142/0x197 lib/dump_stack.c:58
 nmi_cpu_backtrace.cold+0x57/0x94 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x141/0x189 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:158 [inline]
 rcu_dump_cpu_stacks+0x186/0x1d2 kernel/rcu/tree.c:1396
 print_cpu_stall kernel/rcu/tree.c:1542 [inline]
 check_cpu_stall kernel/rcu/tree.c:1610 [inline]
 __rcu_pending kernel/rcu/tree.c:3390 [inline]
 rcu_pending kernel/rcu/tree.c:3452 [inline]
 rcu_check_callbacks.cold+0x43d/0xd0a kernel/rcu/tree.c:2792
 update_process_times+0x31/0x70 kernel/time/timer.c:1590
 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:165
 tick_sched_timer+0x43/0x130 kernel/time/tick-sched.c:1223
 __run_hrtimer kernel/time/hrtimer.c:1223 [inline]
 __hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1287
 hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1321
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:lock_acquire+0x1ea/0x430 kernel/locking/lockdep.c:3997
RSP: 0018:ffff8880aec07cf0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff0fe2ce1 RBX: ffff88820eda6480 RCX: 00000000c33a8904
RDX: dffffc0000000000 RSI: ffff88820eda6d28 RDI: 0000000000000282
RBP: ffff8880aec07d38 R08: 0000000000004f4c R09: ffffffff895772e0
R10: ffff88820eda6d28 R11: ffff88820eda6480 R12: ffff8880aec07d90
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 call_timer_fn+0x114/0x670 kernel/time/timer.c:1276
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1636 [inline]
 __run_timers kernel/time/timer.c:1604 [inline]
 run_timer_softirq+0x5b7/0x1520 kernel/time/timer.c:1649
 __do_softirq+0x244/0x9a0 kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x160/0x1b0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:__fget+0x188/0x370 fs/file.c:695
RSP: 0018:ffff8882048f7688 EFLAGS: 00000a03 ORIG_RAX: ffffffffffffff10
RAX: 1ffff11011cf7667 RBX: ffff88820a0f92e0 RCX: ffffc9000a437000
RDX: 0000000000000000 RSI: ffffffff81961fd7 RDI: ffff88808e7bb33c
RBP: ffff8882048f76d8 R08: 0000000000000000 R09: ffff88820eda6d20
R10: ffff88820eda6d00 R11: ffff88820eda6480 R12: ffff88808e7bb2c0
R13: dffffc0000000000 R14: 0000000000000004 R15: 0000000000000010
 __fget_light fs/file.c:744 [inline]
 __fget_light+0x18e/0x1f0 fs/file.c:733
 __fdget+0x1b/0x20 fs/file.c:752
 fdget include/linux/file.h:57 [inline]
 do_select+0x804/0x13b0 fs/select.c:505
 core_sys_select+0x461/0x6d0 fs/select.c:656
 do_pselect fs/select.c:733 [inline]
 SYSC_pselect6 fs/select.c:774 [inline]
 SyS_pselect6+0x3f2/0x460 fs/select.c:759
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c6c9
RSP: 002b:00007f21daba0c78 EFLAGS: 00000246 ORIG_RAX: 000000000000010e
RAX: ffffffffffffffda RBX: 00007f21daba16d4 RCX: 000000000045c6c9
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000040
RBP: 000000000076bf20 R08: 0000000020000200 R09: 0000000000000000
R10: 0000000020000140 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000855 R14: 00000000004cafe9 R15: 000000000076bf2c