bond0 (unregistering): (slave bond_slave_0): Releasing backup interface bond0 (unregistering): Released all slaves ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7 at lib/debugobjects.c:505 debug_print_object+0xb0/0xc4 lib/debugobjects.c:505 ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x20 kernel/workqueue.c:1601 Modules linked in: Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.12.0-rc2-syzkaller #0 Hardware name: ARM-Versatile Express Workqueue: netns cleanup_net Backtrace: [<8210a668>] (dump_backtrace) from [<8210a8dc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:252) r7:00000080 r6:60000193 r5:00000000 r4:83966184 [<8210a8c4>] (show_stack) from [<821138b0>] (__dump_stack lib/dump_stack.c:79 [inline]) [<8210a8c4>] (show_stack) from [<821138b0>] (dump_stack+0xb8/0xe8 lib/dump_stack.c:120) [<821137f8>] (dump_stack) from [<8210b470>] (panic+0x130/0x378 kernel/panic.c:231) r7:82932d74 r6:8383dd64 r5:00000000 r4:83b620d0 [<8210b340>] (panic) from [<80244934>] (__warn+0xb0/0x164 kernel/panic.c:605) r3:83822c8c r2:00000000 r1:00000000 r0:82932d74 r7:000001f9 [<80244884>] (__warn) from [<8210b754>] (warn_slowpath_fmt+0x9c/0xd4 kernel/panic.c:635) r7:808aeba8 r6:000001f9 r5:8299f41c r4:8299f3dc [<8210b6bc>] (warn_slowpath_fmt) from [<808aeba8>] (debug_print_object+0xb0/0xc4 lib/debugobjects.c:505) r8:822042a0 r7:82976904 r6:88b7c960 r5:841fe554 r4:838233f8 [<808aeaf8>] (debug_print_object) from [<808b0360>] (__debug_check_no_obj_freed lib/debugobjects.c:987 [inline]) [<808aeaf8>] (debug_print_object) from [<808b0360>] (debug_check_no_obj_freed+0x1f8/0x244 lib/debugobjects.c:1018) r8:00000122 r7:8889d5a0 r6:822042a0 r5:88c41c28 r4:88b7c960 [<808b0168>] (debug_check_no_obj_freed) from [<804af6f8>] (slab_free_hook mm/slub.c:1554 [inline]) [<808b0168>] (debug_check_no_obj_freed) from [<804af6f8>] (slab_free_freelist_hook+0xf4/0x188 mm/slub.c:1600) r10:60000113 r9:88c41000 r8:84525cf4 r7:84525cf0 r6:82bd2888 r5:88c41000 r4:844016c0 [<804af604>] (slab_free_freelist_hook) from [<804b3230>] (slab_free mm/slub.c:3161 [inline]) [<804af604>] (slab_free_freelist_hook) from [<804b3230>] (kfree+0xf8/0x4f8 mm/slub.c:4213) r10:8044cea0 r9:83823128 r8:83a6fec4 r7:00000000 r6:88c41000 r5:844016c0 r4:de19dc00 [<804b3138>] (kfree) from [<8044cea0>] (kvfree+0x2c/0x30 mm/util.c:616) r10:83806d00 r9:83823128 r8:83a6fec4 r7:00000000 r6:88c0b600 r5:88c0a180 r4:88c41000 [<8044ce74>] (kvfree) from [<818a4f80>] (netdev_freemem+0x1c/0x20 net/core/dev.c:10619) r5:88c0a180 r4:88c41000 [<818a4f64>] (netdev_freemem) from [<818da390>] (netdev_release+0x2c/0x34 net/core/net-sysfs.c:1875) [<818da364>] (netdev_release) from [<80ab864c>] (device_release+0x38/0xa8 drivers/base/core.c:2108) r5:88c0a180 r4:88c41378 [<80ab8614>] (device_release) from [<8091adf8>] (kobject_cleanup lib/kobject.c:705 [inline]) [<80ab8614>] (device_release) from [<8091adf8>] (kobject_release lib/kobject.c:736 [inline]) [<80ab8614>] (device_release) from [<8091adf8>] (kref_put include/linux/kref.h:65 [inline]) [<80ab8614>] (device_release) from [<8091adf8>] (kobject_put+0xc8/0x204 lib/kobject.c:753) r5:839776b0 r4:88c41378 [<8091ad30>] (kobject_put) from [<818a4d90>] (netdev_run_todo+0x2fc/0x40c net/core/dev.c:10475) r7:00000000 r6:83822dbc r5:83822c94 r4:88c41338 [<818a4a94>] (netdev_run_todo) from [<818b1288>] (rtnl_unlock+0x10/0x14 net/core/rtnetlink.c:112) r10:818860b4 r9:88840034 r8:83a6fec4 r7:84525e40 r6:88b500c0 r5:84525ea4 r4:88b50098 [<818b1278>] (rtnl_unlock) from [<81898708>] (default_device_exit_batch+0x164/0x190 net/core/dev.c:11426) [<818985a4>] (default_device_exit_batch) from [<818860b0>] (ops_exit_list+0x64/0x68 net/core/net_namespace.c:178) r7:84525ea4 r6:83a71924 r5:84525ea4 r4:84525e40 [<8188604c>] (ops_exit_list) from [<818869d8>] (cleanup_net+0x254/0x3d4 net/core/net_namespace.c:595) r7:84525ea4 r6:83a6fecc r5:83a6fecc r4:83a71924 [<81886784>] (cleanup_net) from [<802696b4>] (process_one_work+0x2d4/0x998 kernel/workqueue.c:2275) r10:00000088 r9:83822c98 r8:83ac76b2 r7:84416800 r6:84420000 r5:844a7780 r4:83a6fe50 [<802693e0>] (process_one_work) from [<80269ddc>] (worker_thread+0x64/0x54c kernel/workqueue.c:2421) r10:00000088 r9:84524000 r8:83806d00 r7:84420038 r6:844a7794 r5:84420000 r4:844a7780 [<80269d78>] (worker_thread) from [<80271f50>] (kthread+0x184/0x1a4 kernel/kthread.c:292) r10:84505e34 r9:844a7780 r8:80269d78 r7:00000000 r6:84524000 r5:844bce40 r4:844a7800 [<80271dcc>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:158) Exception stack(0x84525fb0 to 0x84525ff8) 5fa0: 00000000 00000000 00000000 00000000 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80271dcc r4:844bce40 Dumping ftrace buffer: (ftrace buffer empty) Rebooting in 1 seconds..