bond0 (unregistering): (slave bond_slave_1): Releasing backup interface bond0 (unregistering): (slave bond_slave_0): Releasing backup interface bond0 (unregistering): Released all slaves ------------[ cut here ]------------ ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x90 kernel/workqueue.c:1592 WARNING: CPU: 0 PID: 440 at lib/debugobjects.c:488 debug_print_object+0x197/0x2b0 lib/debugobjects.c:485 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 440 Comm: kworker/u4:5 Not tainted 5.6.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x96/0xe0 lib/dump_stack.c:118 panic+0x2a1/0x52a kernel/panic.c:221 __warn.cold.10+0x25/0x2f kernel/panic.c:582 report_bug+0x1aa/0x260 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+0x12d/0x1e0 arch/x86/kernel/traps.c:267 do_invalid_op+0x31/0x40 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:debug_print_object+0x197/0x2b0 lib/debugobjects.c:485 Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 e3 00 00 00 48 8b 14 dd 40 cc e0 8a 4c 89 ee 48 c7 c7 60 2c b8 88 e8 b5 cc bd fd <0f> 0b 83 05 64 65 ea 08 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3 RSP: 0018:ffffc900026bf928 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff89e01fc0 RDI: ffffffff8e5481e0 RBP: 0000000000000001 R08: ffffed10173c6479 R09: ffffed10173c6479 R10: ffffed10173c6478 R11: ffff8880b9e323c7 R12: ffffffff8a303b80 R13: ffffffff88b83260 R14: ffffffff81598a70 R15: ffff8880b4445360 __debug_check_no_obj_freed lib/debugobjects.c:967 [inline] debug_check_no_obj_freed+0x2d1/0x410 lib/debugobjects.c:998 slab_free_hook mm/slub.c:1441 [inline] slab_free_freelist_hook+0xc0/0x140 mm/slub.c:1477 slab_free mm/slub.c:3024 [inline] kfree+0xd6/0x3c0 mm/slub.c:3976 device_release+0x65/0x1c0 drivers/base/core.c:1371 kobject_cleanup lib/kobject.c:693 [inline] kobject_release lib/kobject.c:722 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x191/0x430 lib/kobject.c:739 netdev_run_todo+0x44c/0x6a0 net/core/dev.c:9646 default_device_exit_batch+0x2d8/0x3b0 net/core/dev.c:10443 cleanup_net+0x45a/0x900 net/core/net_namespace.c:589 process_one_work+0x8ff/0x1690 kernel/workqueue.c:2266 worker_thread+0x82/0xb50 kernel/workqueue.c:2412 kthread+0x31d/0x3e0 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Kernel Offset: disabled Rebooting in 86400 seconds..