------------[ cut here ]------------ ODEBUG: free active (active state 0) object: 000000001472e6c2 object type: timer_list hint: arch_atomic_fetch_sub_release arch/arm64/include/asm/atomic.h:51 [inline] ODEBUG: free active (active state 0) object: 000000001472e6c2 object type: timer_list hint: atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:177 [inline] ODEBUG: free active (active state 0) object: 000000001472e6c2 object type: timer_list hint: __refcount_sub_and_test include/linux/refcount.h:272 [inline] ODEBUG: free active (active state 0) object: 000000001472e6c2 object type: timer_list hint: __refcount_dec_and_test include/linux/refcount.h:315 [inline] ODEBUG: free active (active state 0) object: 000000001472e6c2 object type: timer_list hint: refcount_dec_and_test include/linux/refcount.h:333 [inline] ODEBUG: free active (active state 0) object: 000000001472e6c2 object type: timer_list hint: kref_put include/linux/kref.h:64 [inline] ODEBUG: free active (active state 0) object: 000000001472e6c2 object type: timer_list hint: batadv_dat_entry_put net/batman-adv/distributed-arp-table.c:133 [inline] ODEBUG: free active (active state 0) object: 000000001472e6c2 object type: timer_list hint: batadv_dat_purge+0x0/0x154 net/batman-adv/distributed-arp-table.c:1829 WARNING: CPU: 0 PID: 40 at lib/debugobjects.c:508 debug_print_object lib/debugobjects.c:505 [inline] WARNING: CPU: 0 PID: 40 at lib/debugobjects.c:508 __debug_check_no_obj_freed lib/debugobjects.c:1012 [inline] WARNING: CPU: 0 PID: 40 at lib/debugobjects.c:508 debug_check_no_obj_freed+0x410/0x528 lib/debugobjects.c:1043 Modules linked in: CPU: 0 PID: 40 Comm: kworker/u4:3 Not tainted 6.4.0-rc3-syzkaller-geb0f1697d729 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 Workqueue: netns cleanup_net pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : debug_print_object lib/debugobjects.c:505 [inline] pc : __debug_check_no_obj_freed lib/debugobjects.c:1012 [inline] pc : debug_check_no_obj_freed+0x410/0x528 lib/debugobjects.c:1043 lr : debug_print_object lib/debugobjects.c:505 [inline] lr : __debug_check_no_obj_freed lib/debugobjects.c:1012 [inline] lr : debug_check_no_obj_freed+0x410/0x528 lib/debugobjects.c:1043 sp : ffff80001ad075d0 x29: ffff80001ad07620 x28: ffff8000125bb020 x27: dfff800000000000 x26: ffff0001275514f8 x25: 0000000000000000 x24: ffff80001a47f580 x23: ffff8000125bb020 x22: ffff0001275514f8 x21: ffff80001a47f578 x20: ffff800012a71878 x19: ffff000127550000 x18: ffff80001ad06ac0 x17: 626f203263366532 x16: ffff8000124340b0 x15: 0000000000000002 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000001 x11: 0000000000000000 x10: 0000000000000000 x9 : f4ef117038828000 x8 : f4ef117038828000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff80001ad06eb8 x4 : ffff800015f9e800 x3 : ffff800008596160 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: debug_print_object lib/debugobjects.c:505 [inline] __debug_check_no_obj_freed lib/debugobjects.c:1012 [inline] debug_check_no_obj_freed+0x410/0x528 lib/debugobjects.c:1043 slab_free_hook mm/slub.c:1756 [inline] slab_free_freelist_hook mm/slub.c:1807 [inline] slab_free mm/slub.c:3786 [inline] __kmem_cache_free+0x24c/0x49c mm/slub.c:3799 kfree+0xb8/0x19c mm/slab_common.c:1015 kvfree+0x40/0x50 mm/util.c:650 netdev_freemem+0x4c/0x64 net/core/dev.c:10580 netdev_release+0x88/0xb0 net/core/net-sysfs.c:1938 device_release+0x8c/0x1ac kobject_cleanup lib/kobject.c:683 [inline] kobject_release lib/kobject.c:714 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x2a8/0x41c lib/kobject.c:731 netdev_run_todo+0xcf0/0xe08 net/core/dev.c:10400 rtnl_unlock+0x14/0x20 net/core/rtnetlink.c:151 default_device_exit_batch+0x6cc/0x744 net/core/dev.c:11392 ops_exit_list net/core/net_namespace.c:175 [inline] cleanup_net+0x5dc/0x8d0 net/core/net_namespace.c:614 process_one_work+0x788/0x12d4 kernel/workqueue.c:2405 worker_thread+0x8e0/0xfe8 kernel/workqueue.c:2552 kthread+0x288/0x310 kernel/kthread.c:379 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:853 irq event stamp: 3137016 hardirqs last enabled at (3137015): [] __up_console_sem+0x60/0xb4 kernel/printk/printk.c:347 hardirqs last disabled at (3137016): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (3136950): [] spin_unlock_bh include/linux/spinlock.h:395 [inline] softirqs last enabled at (3136950): [] batadv_tvlv_handler_unregister+0x158/0x254 net/batman-adv/tvlv.c:602 softirqs last disabled at (3136948): [] spin_lock_bh include/linux/spinlock.h:355 [inline] softirqs last disabled at (3136948): [] batadv_tvlv_handler_unregister+0xc4/0x254 net/batman-adv/tvlv.c:600 ---[ end trace 0000000000000000 ]---