------------[ cut here ]------------
ODEBUG: free active (active state 0) object type: work_struct hint: tcindex_destroy_rexts_work+0x0/0xd0 net/sched/cls_tcindex.c:57
WARNING: CPU: 0 PID: 82 at lib/debugobjects.c:488 debug_print_object lib/debugobjects.c:485 [inline]
WARNING: CPU: 0 PID: 82 at lib/debugobjects.c:488 __debug_check_no_obj_freed lib/debugobjects.c:967 [inline]
WARNING: CPU: 0 PID: 82 at lib/debugobjects.c:488 debug_check_no_obj_freed+0x468/0x620 lib/debugobjects.c:998
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 82 Comm: kworker/u4:2 Not tainted 5.5.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: tc_filter_workqueue tcindex_destroy_work
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fb/0x318 lib/dump_stack.c:118
 panic+0x264/0x7a9 kernel/panic.c:221
 __warn+0x209/0x210 kernel/panic.c:582
 report_bug+0x1b6/0x2f0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0xcf/0x1c0 arch/x86/kernel/traps.c:267
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:debug_print_object lib/debugobjects.c:485 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:967 [inline]
RIP: 0010:debug_check_no_obj_freed+0x468/0x620 lib/debugobjects.c:998
Code: 08 48 89 df e8 59 f7 10 fe 4c 8b 03 48 c7 c7 85 9c f0 88 48 c7 c6 ef 91 ee 88 4c 89 e2 44 89 f9 4d 89 e9 31 c0 e8 68 b1 a5 fd <0f> 0b 48 ba 00 00 00 00 00 fc ff df 4c 8b 6d b0 ff 05 36 9c c6 05
RSP: 0018:ffffc90001107be0 EFLAGS: 00010046
RAX: c0baa92f55d69400 RBX: ffffffff892d0e30 RCX: ffff8880a9770180
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90001107c78 R08: ffffffff815fb3a4 R09: ffffed1015d44592
R10: ffffed1015d44592 R11: 0000000000000000 R12: ffffffff88f4784a
R13: ffffffff8698c080 R14: ffff888042ad4000 R15: 0000000000000000
 kfree+0xff/0x220 mm/slab.c:3756
 tcindex_destroy_work+0x3e/0x70 net/sched/cls_tcindex.c:231
 process_one_work+0x7f5/0x10f0 kernel/workqueue.c:2264
 worker_thread+0xbbc/0x1630 kernel/workqueue.c:2410
 kthread+0x332/0x350 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..