x_tables: ip6_tables: rpfilter match: used from hooks PREROUTING/OUTPUT, but only valid from PREROUTING
ODEBUG: free active (active state 0) object type: rcu_head hint:           (null)
------------[ cut here ]------------
WARNING: CPU: 1 PID: 7951 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: 7951 Comm: syz-fuzzer Not tainted 4.14.273-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: 0000:ffff8880ba507d00 EFLAGS: 00010082
RAX: 0000000000000051 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff878bc340 RDI: ffffed10174a0f96
RBP: ffffffff878b14c0 R08: 0000000000000051 R09: 0000000000000000
R10: 0000000000000000 R11: ffff888094d8e340 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88804f0f8280 R15: ffff8880b2cb1000
 __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: 0033:0x50c3d1
RSP: 002b:000000c028306458 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10
RAX: 000000000000c1c0 RBX: 0000000000661140 RCX: 0000000000524980
RDX: 000000c000488000 RSI: 000000c0000a2048 RDI: 0000000000522860
RBP: 000000c028306480 R08: 000000003c84c8af R09: 0000000000000002
R10: 00000000008ac318 R11: 000000c0019ee220 R12: 0000000000000000
R13: 0000000000000000 R14: 000000c000001d40 R15: 00007f501eede522

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