hid-generic 0000:0000:0000.0029: unknown main item tag 0x0 hid-generic 0000:0000:0000.0029: unknown main item tag 0x0 hid-generic 0000:0000:0000.0029: unknown main item tag 0x0 hid-generic 0000:0000:0000.0029: unknown main item tag 0x0 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 19443 at lib/debugobjects.c:263 debug_print_object+0x181/0x210 lib/debugobjects.c:260 ODEBUG: free active (active state 0) object type: work_struct hint: flow_cache_gc_task+0x0/0x4b0 net/core/flow.c:247 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 19443 Comm: kworker/u4:19 Not tainted 4.9.141+ #1 Workqueue: netns cleanup_net ffff8801c9427770 ffffffff81b42e79 ffffffff82a38ce0 00000000ffffffff ffffffff82b44c00 0000000000000001 0000000000000009 ffff8801c9427830 ffffffff813f7125 0000000041b58ab3 ffffffff82e2b62b ffffffff813f6f66 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] panic+0x1bf/0x39f kernel/panic.c:179 [] __warn.cold.8+0x2f/0x2f kernel/panic.c:542 [] warn_slowpath_fmt+0xc2/0x100 kernel/panic.c:565 [] debug_print_object+0x181/0x210 lib/debugobjects.c:260 [] __debug_check_no_obj_freed lib/debugobjects.c:720 [inline] [] debug_check_no_obj_freed+0x4ae/0x890 lib/debugobjects.c:749 [] slab_free_hook mm/slub.c:1348 [inline] [] slab_free_freelist_hook mm/slub.c:1377 [inline] [] slab_free mm/slub.c:2958 [inline] [] kmem_cache_free+0x1a4/0x310 mm/slub.c:2980 [] net_free net/core/net_namespace.c:374 [inline] [] net_drop_ns+0x62/0x80 net/core/net_namespace.c:381 [] cleanup_net+0x627/0x8b0 net/core/net_namespace.c:491 [] process_one_work+0x831/0x15f0 kernel/workqueue.c:2092 [] worker_thread+0xd6/0x1140 kernel/workqueue.c:2226 [] kthread+0x26d/0x300 kernel/kthread.c:211 [] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 Kernel Offset: disabled Rebooting in 86400 seconds..