kobject: 'ip6gretap0' (00000000837218ab): kobject_add_internal: parent: 'net', set: 'devices' ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x90 kernel/workqueue.c:4941 kobject: 'ip6gretap0' (00000000837218ab): kobject_uevent_env WARNING: CPU: 1 PID: 363 at lib/debugobjects.c:325 debug_print_object+0x168/0x250 lib/debugobjects.c:325 kobject: 'ip6gretap0' (00000000837218ab): fill_kobj_path: path = '/devices/virtual/net/ip6gretap0' Kernel panic - not syncing: panic_on_warn set ... kobject: 'queues' (00000000bd0fc78a): kobject_add_internal: parent: 'ip6gretap0', set: '' CPU: 1 PID: 363 Comm: kworker/u4:7 Not tainted 4.19.93-syzkaller #0 kobject: 'queues' (00000000bd0fc78a): kobject_uevent_env 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+0x197/0x210 lib/dump_stack.c:118 kobject: 'queues' (00000000bd0fc78a): kobject_uevent_env: filter function caused the event to drop! panic+0x26a/0x50e kernel/panic.c:186 kobject: 'rx-0' (00000000b1c6ff7e): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (00000000b1c6ff7e): kobject_uevent_env __warn.cold+0x20/0x53 kernel/panic.c:541 kobject: 'rx-0' (00000000b1c6ff7e): fill_kobj_path: path = '/devices/virtual/net/ip6gretap0/queues/rx-0' kobject: 'tx-0' (00000000db986dec): kobject_add_internal: parent: 'queues', set: 'queues' report_bug+0x263/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x204/0x360 arch/x86/kernel/traps.c:296 kobject: 'tx-0' (00000000db986dec): kobject_uevent_env kobject: 'tx-0' (00000000db986dec): fill_kobj_path: path = '/devices/virtual/net/ip6gretap0/queues/tx-0' do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1037 kobject: 'batman_adv' (00000000037661ea): kobject_add_internal: parent: 'ip6gretap0', set: '' RIP: 0010:debug_print_object+0x168/0x250 lib/debugobjects.c:325 kobject: 'bridge0' (00000000b799f17f): kobject_add_internal: parent: 'net', set: 'devices' Code: dd 60 4d eb 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 60 4d eb 87 48 c7 c7 a0 42 eb 87 e8 a6 98 d4 fd <0f> 0b 83 05 2b 3a 64 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 kobject: 'bridge0' (00000000b799f17f): kobject_uevent_env RSP: 0018:ffff8880a8d9f838 EFLAGS: 00010086 kobject: 'bridge0' (00000000b799f17f): fill_kobj_path: path = '/devices/virtual/net/bridge0' RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8155bc26 RDI: ffffed10151b3ef9 kobject: 'queues' (000000001bc5079f): kobject_add_internal: parent: 'bridge0', set: '' RBP: ffff8880a8d9f878 R08: ffff8880a8d94540 R09: ffffed1015d23ee3 R10: ffffed1015d23ee2 R11: ffff8880ae91f717 R12: 0000000000000001 kobject: 'queues' (000000001bc5079f): kobject_uevent_env R13: ffffffff88fa4420 R14: ffffffff815b31e0 R15: ffff888072ec5620 kobject: 'queues' (000000001bc5079f): kobject_uevent_env: filter function caused the event to drop! __debug_check_no_obj_freed lib/debugobjects.c:785 [inline] debug_check_no_obj_freed+0x29f/0x464 lib/debugobjects.c:817 kobject: 'rx-0' (00000000582a5188): kobject_add_internal: parent: 'queues', set: 'queues' kfree+0xbd/0x220 mm/slab.c:3821 kvfree+0x61/0x70 mm/util.c:452 netdev_freemem+0x4c/0x60 net/core/dev.c:8914 kobject: 'rx-0' (00000000582a5188): kobject_uevent_env netdev_release+0x86/0xb0 net/core/net-sysfs.c:1645 kobject: 'rx-0' (00000000582a5188): fill_kobj_path: path = '/devices/virtual/net/bridge0/queues/rx-0' device_release+0x7b/0x210 drivers/base/core.c:892 kobject_cleanup lib/kobject.c:662 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put.cold+0x289/0x2e6 lib/kobject.c:708 kobject: 'tx-0' (000000005d7e638b): kobject_add_internal: parent: 'queues', set: 'queues' netdev_run_todo+0x53b/0x7a0 net/core/dev.c:8819 kobject: 'tx-0' (000000005d7e638b): kobject_uevent_env rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:117 default_device_exit_batch+0x358/0x410 net/core/dev.c:9602 kobject: 'tx-0' (000000005d7e638b): fill_kobj_path: path = '/devices/virtual/net/bridge0/queues/tx-0' kobject: 'brif' (0000000045ddc325): kobject_add_internal: parent: 'bridge0', set: '' kobject: 'batman_adv' (00000000c68c70b0): kobject_add_internal: parent: 'bridge0', set: '' ops_exit_list.isra.0+0xfc/0x150 net/core/net_namespace.c:156 cleanup_net+0x404/0x960 net/core/net_namespace.c:553 kobject: 'vcan0' (00000000974389b6): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'vcan0' (00000000974389b6): kobject_uevent_env process_one_work+0x989/0x1750 kernel/workqueue.c:2153 kobject: 'vcan0' (00000000974389b6): fill_kobj_path: path = '/devices/virtual/net/vcan0' kobject: 'queues' (0000000052e278e8): kobject_add_internal: parent: 'vcan0', set: '' worker_thread+0x98/0xe40 kernel/workqueue.c:2296 kthread+0x354/0x420 kernel/kthread.c:246 kobject: 'queues' (0000000052e278e8): kobject_uevent_env kobject: 'queues' (0000000052e278e8): kobject_uevent_env: filter function caused the event to drop! ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 ======================================================