ODEBUG: free active (active state 0) object type: rcu_head hint:           (null)
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4626 at lib/debugobjects.c:287 debug_print_object.cold+0xa7/0xdb lib/debugobjects.c:287
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 4626 Comm: systemd-udevd Not tainted 4.14.285-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:ffff8880ba407d00 EFLAGS: 00010082
RAX: 0000000000000051 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff878bc880 RDI: ffffed1017480f96
RBP: ffffffff878b1a00 R08: 0000000000000051 R09: 0000000000000000
R10: 0000000000000000 R11: ffff88809f1ae1c0 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888054f80100 R15: ffff8880a5a6a8f8
 __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:unwind_get_return_address arch/x86/kernel/unwind_orc.c:252 [inline]
RIP: 0010:unwind_get_return_address+0x66/0x90 arch/x86/kernel/unwind_orc.c:247
RSP: 0018:ffff88809f1b79a0 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff10
RAX: dffffc0000000000 RBX: ffff88809f1b79c8 RCX: 0000000000000000
RDX: 1ffff11013e36f42 RSI: ffff88809f1b78b8 RDI: ffffffff817eb784
RBP: ffff88809f1b7a10 R08: 0000000000000001 R09: 0000000000000001
R10: ffff88809f1b7ca0 R11: 0000000000000001 R12: ffff88809f1b7a50
R13: 0000000000000000 R14: ffff88823f8c1200 R15: 0000000000001000
 __save_stack_trace+0xa0/0x160 arch/x86/kernel/stacktrace.c:45
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
 kmem_cache_alloc+0x124/0x3c0 mm/slab.c:3552
 getname_flags+0xc8/0x550 fs/namei.c:138
 user_path_at_empty+0x2a/0x50 fs/namei.c:2631
 user_path_at include/linux/namei.h:57 [inline]
 vfs_statx+0xd1/0x180 fs/stat.c:185
 vfs_lstat include/linux/fs.h:3072 [inline]
 SYSC_newlstat fs/stat.c:349 [inline]
 SyS_newlstat+0x83/0xe0 fs/stat.c:343
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fb7f8f9a335
RSP: 002b:00007ffccd4a4128 EFLAGS: 00000246 ORIG_RAX: 0000000000000006
RAX: ffffffffffffffda RBX: 0000557673cc6f00 RCX: 00007fb7f8f9a335
RDX: 00007ffccd4a4160 RSI: 00007ffccd4a4160 RDI: 0000557673cc5f00
RBP: 00007ffccd4a4220 R08: 00007fb7f9259248 R09: 0000000000001010
R10: 0000000000000020 R11: 0000000000000246 R12: 0000557673cc5f00
R13: 0000557673cc5f25 R14: 0000557673cae9c4 R15: 0000557673cae9c5

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