============================= WARNING: suspicious RCU usage 6.15.0-rc1-syzkaller-g2fe2b96c3818 #0 Not tainted ----------------------------- net/sched/sch_generic.c:1285 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 3 locks held by kworker/u8:2/44: #0: ffff0000ed7b3148 ((wq_completion)bond0){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3212 #1: ffff800098947b80 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3212 #2: ffff800090127de0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:330 stack backtrace: CPU: 1 UID: 0 PID: 44 Comm: kworker/u8:2 Not tainted 6.15.0-rc1-syzkaller-g2fe2b96c3818 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: bond0 bond_mii_monitor Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 lockdep_rcu_suspicious+0x1a8/0x2c0 kernel/locking/lockdep.c:6865 dev_deactivate_queue+0xac/0x1e4 net/sched/sch_generic.c:1285 netdev_for_each_tx_queue include/linux/netdevice.h:2650 [inline] dev_deactivate_many+0x130/0xb70 net/sched/sch_generic.c:1361 dev_deactivate+0x13c/0x1fc net/sched/sch_generic.c:1398 linkwatch_do_dev+0x100/0x1a8 net/core/link_watch.c:184 linkwatch_sync_dev+0x150/0x16c net/core/link_watch.c:272 ethtool_op_get_link+0x20/0x5c net/ethtool/ioctl.c:63 bond_check_dev_link+0x1ac/0x3f4 drivers/net/bonding/bond_main.c:864 bond_miimon_inspect drivers/net/bonding/bond_main.c:2734 [inline] bond_mii_monitor+0x3d8/0x28b4 drivers/net/bonding/bond_main.c:2956 process_one_work+0x810/0x1638 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x97c/0xf08 kernel/workqueue.c:3400 kthread+0x674/0x7dc kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 ============================= WARNING: suspicious RCU usage 6.15.0-rc1-syzkaller-g2fe2b96c3818 #0 Not tainted ----------------------------- ./include/linux/rtnetlink.h:163 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 3 locks held by kworker/u8:2/44: #0: ffff0000ed7b3148 ((wq_completion)bond0){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3212 #1: ffff800098947b80 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3212 #2: ffff800090127de0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:330 stack backtrace: CPU: 1 UID: 0 PID: 44 Comm: kworker/u8:2 Not tainted 6.15.0-rc1-syzkaller-g2fe2b96c3818 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: bond0 bond_mii_monitor Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 lockdep_rcu_suspicious+0x1a8/0x2c0 kernel/locking/lockdep.c:6865 dev_ingress_queue include/linux/rtnetlink.h:163 [inline] dev_deactivate_many+0x208/0xb70 net/sched/sch_generic.c:1363 dev_deactivate+0x13c/0x1fc net/sched/sch_generic.c:1398 linkwatch_do_dev+0x100/0x1a8 net/core/link_watch.c:184 linkwatch_sync_dev+0x150/0x16c net/core/link_watch.c:272 ethtool_op_get_link+0x20/0x5c net/ethtool/ioctl.c:63 bond_check_dev_link+0x1ac/0x3f4 drivers/net/bonding/bond_main.c:864 bond_miimon_inspect drivers/net/bonding/bond_main.c:2734 [inline] bond_mii_monitor+0x3d8/0x28b4 drivers/net/bonding/bond_main.c:2956 process_one_work+0x810/0x1638 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x97c/0xf08 kernel/workqueue.c:3400 kthread+0x674/0x7dc kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862