------------[ cut here ]------------ ODEBUG: free active (active state 0) object type: work_struct hint: tcindex_destroy_rexts_work+0x0/0x30 net/sched/cls_tcindex.c:143 WARNING: CPU: 1 PID: 12316 at lib/debugobjects.c:485 debug_print_object+0x168/0x250 lib/debugobjects.c:485 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 12316 Comm: kworker/u4:10 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+0x197/0x210 lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x3e kernel/panic.c:582 report_bug+0x289/0x300 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] fixup_bug arch/x86/kernel/traps.c:169 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:debug_print_object+0x168/0x250 lib/debugobjects.c:485 Code: dd 00 8c 91 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 00 8c 91 88 48 c7 c7 60 81 91 88 e8 07 13 a2 fd <0f> 0b 83 05 03 78 01 07 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 RSP: 0018:ffffc90007e27c08 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815e5916 RDI: fffff52000fc4f73 RBP: ffffc90007e27c48 R08: ffff88809752a080 R09: ffffed1015d245c9 R10: ffffed1015d245c8 R11: ffff8880ae922e43 R12: 0000000000000001 R13: ffffffff89b78720 R14: ffffffff814c23f0 R15: ffff8880198a6348 __debug_check_no_obj_freed lib/debugobjects.c:967 [inline] debug_check_no_obj_freed+0x2d6/0x441 lib/debugobjects.c:998 kfree+0xf8/0x2c0 mm/slab.c:3756 tcindex_destroy_work+0x33/0x80 net/sched/cls_tcindex.c:231 process_one_work+0xa05/0x17a0 kernel/workqueue.c:2264 worker_thread+0x98/0xe40 kernel/workqueue.c:2410 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Kernel Offset: disabled Rebooting in 86400 seconds..