netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'.
ODEBUG: free active (active state 0) object type: rcu_head hint:           (null)
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8002 at lib/debugobjects.c:287 debug_print_object.cold+0xa7/0xdb lib/debugobjects.c:287
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 8002 Comm: syz-executor.1 Not tainted 4.14.281-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+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x44 kernel/panic.c:547
 report_bug+0x208/0x250 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:debug_print_object.cold+0xa7/0xdb lib/debugobjects.c:287
RSP: 0018:ffff8880ba507d00 EFLAGS: 00010082
RAX: 0000000000000051 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff878bc600 RDI: ffffed10174a0f96
RBP: ffffffff878b1780 R08: 0000000000000051 R09: 0000000000000000
R10: 0000000000000000 R11: ffff8880b30e4500 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88804d100100 R15: ffff8880a1bb31c0
 __debug_check_no_obj_freed lib/debugobjects.c:747 [inline]
 debug_check_no_obj_freed+0x3b7/0x680 lib/debugobjects.c:776
 kfree+0xb9/0x250 mm/slab.c:3814
 __tcindex_destroy+0x2e/0x70 net/sched/cls_tcindex.c:253
 __rcu_reclaim kernel/rcu/rcu.h:195 [inline]
 rcu_do_batch kernel/rcu/tree.c:2699 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2929 [inline]
 rcu_process_callbacks+0x780/0x1180 kernel/rcu/tree.c:2946
 __do_softirq+0x24d/0x9ff kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x193/0x240 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:638 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106
 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793
 </IRQ>
RIP: 0010:blk_needs_flush_plug include/linux/blkdev.h:1350 [inline]
RIP: 0010:sched_submit_work kernel/sched/core.c:3420 [inline]
RIP: 0010:schedule+0xd4/0x1b0 kernel/sched/core.c:3428
RSP: 0018:ffff8880966dfc90 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: dffffc0000000000 RBX: ffff8880b30e4500 RCX: 0000000000000000
RDX: 1ffff1101661caa3 RSI: 0000000000000001 RDI: ffff8880b30e5518
RBP: 0000000000000000 R08: ffffffff8c030f48 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880966dfde8 R14: ffff8880b30e4500 R15: ffff8880b30e4500
 freezable_schedule include/linux/freezer.h:172 [inline]
 do_nanosleep+0x229/0x600 kernel/time/hrtimer.c:1483
 hrtimer_nanosleep+0x1da/0x4b0 kernel/time/hrtimer.c:1537
 common_nsleep+0x23/0x30 kernel/time/posix-timers.c:1206
 SYSC_clock_nanosleep kernel/time/posix-timers.c:1233 [inline]
 SyS_clock_nanosleep+0x1ff/0x2d0 kernel/time/posix-timers.c:1211
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fc060638e31
RSP: 002b:00007ffe4d606470 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 0000000000000068 RCX: 00007fc060638e31
RDX: 00007ffe4d6064b0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffe4d60653c R08: 0000000000000000 R09: 000000340ba236a9
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 000000000003057e R14: 0000000000000000 R15: 00007ffe4d6065a0

======================================================