wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
------------[ cut here ]------------
ODEBUG: free active (active state 0) object type: work_struct hint: tcindex_destroy_rexts_work+0x0/0x20 syzkaller/managers/linux-4-19/kernel/./include/net/pkt_cls.h:301
WARNING: CPU: 1 PID: 34 at lib/debugobjects.c:325 debug_print_object+0x160/0x250 syzkaller/managers/linux-4-19/kernel/lib/debugobjects.c:325
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 34 Comm: kworker/u4:2 Not tainted 4.19.172-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 syzkaller/managers/linux-4-19/kernel/lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef syzkaller/managers/linux-4-19/kernel/lib/dump_stack.c:118
 panic+0x26a/0x50e syzkaller/managers/linux-4-19/kernel/kernel/panic.c:186
 __warn.cold+0x20/0x5a syzkaller/managers/linux-4-19/kernel/kernel/panic.c:541
 report_bug+0x262/0x2b0 syzkaller/managers/linux-4-19/kernel/lib/bug.c:186
 fixup_bug syzkaller/managers/linux-4-19/kernel/arch/x86/kernel/traps.c:178 [inline]
 fixup_bug syzkaller/managers/linux-4-19/kernel/arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 syzkaller/managers/linux-4-19/kernel/arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/entry_64.S:1038
RIP: 0010:debug_print_object+0x160/0x250 syzkaller/managers/linux-4-19/kernel/lib/debugobjects.c:325
Code: dd c0 cd b3 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd c0 cd b3 88 48 c7 c7 e0 c1 b3 88 e8 e5 04 7a 04 <0f> 0b 83 05 13 4e b1 07 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89
RSP: 0018:ffff8880b50c7c28 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff814de0d1 RDI: ffffed1016a18f77
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: ffffffff8c65d05b R12: ffffffff89f53200
R13: ffffffff813d55e0 R14: ffff8880b4c5e0a8 R15: dffffc0000000000
 __debug_check_no_obj_freed syzkaller/managers/linux-4-19/kernel/lib/debugobjects.c:785 [inline]
 debug_check_no_obj_freed+0x271/0x490 syzkaller/managers/linux-4-19/kernel/lib/debugobjects.c:817
 kfree+0xb9/0x210 syzkaller/managers/linux-4-19/kernel/mm/slab.c:3821
 tcindex_destroy_work+0x2e/0x70 syzkaller/managers/linux-4-19/kernel/net/sched/cls_tcindex.c:230
 process_one_work+0x864/0x1570 syzkaller/managers/linux-4-19/kernel/kernel/workqueue.c:2155
 worker_thread+0x64c/0x1130 syzkaller/managers/linux-4-19/kernel/kernel/workqueue.c:2298
 kthread+0x33f/0x460 syzkaller/managers/linux-4-19/kernel/kernel/kthread.c:259
 ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/entry_64.S:415
Kernel Offset: disabled
Rebooting in 86400 seconds..