============================= WARNING: suspicious RCU usage 6.15.0-rc4-syzkaller-gb4432656b36e #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/u8:1/13: #0: ffff88807829f148 ((wq_completion)bond0#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline] #0: ffff88807829f148 ((wq_completion)bond0#2){+.+.}-{0:0}, at: process_scheduled_works+0x9b1/0x17a0 kernel/workqueue.c:3319 #1: ffffc90000127c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline] #1: ffffc90000127c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ec/0x17a0 kernel/workqueue.c:3319 #2: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #2: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #2: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x153/0x2e00 drivers/net/bonding/bond_main.c:2959 stack backtrace: CPU: 1 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Workqueue: bond0 bond_mii_monitor Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 lockdep_rcu_suspicious+0x140/0x1d0 kernel/locking/lockdep.c:6865 dev_deactivate_queue+0x8f/0x1b0 net/sched/sch_generic.c:1285 netdev_for_each_tx_queue include/linux/netdevice.h:2650 [inline] dev_deactivate_many+0xd3/0xd40 net/sched/sch_generic.c:1361 dev_deactivate+0x118/0x1b0 net/sched/sch_generic.c:1398 linkwatch_do_dev+0x10f/0x170 net/core/link_watch.c:184 ethtool_op_get_link+0x15/0x70 net/ethtool/ioctl.c:63 bond_check_dev_link+0x444/0x6c0 drivers/net/bonding/bond_main.c:866 bond_miimon_inspect drivers/net/bonding/bond_main.c:2739 [inline] bond_mii_monitor+0x428/0x2e00 drivers/net/bonding/bond_main.c:2961 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ============================= WARNING: suspicious RCU usage 6.15.0-rc4-syzkaller-gb4432656b36e #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/u8:1/13: #0: ffff88807829f148 ((wq_completion)bond0#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline] #0: ffff88807829f148 ((wq_completion)bond0#2){+.+.}-{0:0}, at: process_scheduled_works+0x9b1/0x17a0 kernel/workqueue.c:3319 #1: ffffc90000127c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline] #1: ffffc90000127c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ec/0x17a0 kernel/workqueue.c:3319 #2: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #2: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #2: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x153/0x2e00 drivers/net/bonding/bond_main.c:2959 stack backtrace: CPU: 0 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Workqueue: bond0 bond_mii_monitor Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 lockdep_rcu_suspicious+0x140/0x1d0 kernel/locking/lockdep.c:6865 dev_ingress_queue include/linux/rtnetlink.h:163 [inline] dev_deactivate_many+0x197/0xd40 net/sched/sch_generic.c:1363 dev_deactivate+0x118/0x1b0 net/sched/sch_generic.c:1398 linkwatch_do_dev+0x10f/0x170 net/core/link_watch.c:184 ethtool_op_get_link+0x15/0x70 net/ethtool/ioctl.c:63 bond_check_dev_link+0x444/0x6c0 drivers/net/bonding/bond_main.c:866 bond_miimon_inspect drivers/net/bonding/bond_main.c:2739 [inline] bond_mii_monitor+0x428/0x2e00 drivers/net/bonding/bond_main.c:2961 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ============================= WARNING: suspicious RCU usage 6.15.0-rc4-syzkaller-gb4432656b36e #0 Not tainted ----------------------------- net/sched/sch_generic.c:1301 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/u8:1/13: #0: ffff88807829f148 ((wq_completion)bond0#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline] #0: ffff88807829f148 ((wq_completion)bond0#2){+.+.}-{0:0}, at: process_scheduled_works+0x9b1/0x17a0 kernel/workqueue.c:3319 #1: ffffc90000127c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline] #1: ffffc90000127c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ec/0x17a0 kernel/workqueue.c:3319 #2: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #2: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #2: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x153/0x2e00 drivers/net/bonding/bond_main.c:2959 stack backtrace: CPU: 0 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Workqueue: bond0 bond_mii_monitor Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 lockdep_rcu_suspicious+0x140/0x1d0 kernel/locking/lockdep.c:6865 dev_reset_queue+0x88/0x1b0 net/sched/sch_generic.c:1301 netdev_for_each_tx_queue include/linux/netdevice.h:2650 [inline] dev_deactivate_many+0x720/0xd40 net/sched/sch_generic.c:1375 dev_deactivate+0x118/0x1b0 net/sched/sch_generic.c:1398 linkwatch_do_dev+0x10f/0x170 net/core/link_watch.c:184 ethtool_op_get_link+0x15/0x70 net/ethtool/ioctl.c:63 bond_check_dev_link+0x444/0x6c0 drivers/net/bonding/bond_main.c:866 bond_miimon_inspect drivers/net/bonding/bond_main.c:2739 [inline] bond_mii_monitor+0x428/0x2e00 drivers/net/bonding/bond_main.c:2961 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ============================= WARNING: suspicious RCU usage 6.15.0-rc4-syzkaller-gb4432656b36e #0 Not tainted ----------------------------- net/sched/sch_generic.c:1332 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/u8:1/13: #0: ffff88807829f148 ((wq_completion)bond0#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline] #0: ffff88807829f148 ((wq_completion)bond0#2){+.+.}-{0:0}, at: process_scheduled_works+0x9b1/0x17a0 kernel/workqueue.c:3319 #1: ffffc90000127c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline] #1: ffffc90000127c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ec/0x17a0 kernel/workqueue.c:3319 #2: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #2: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #2: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x153/0x2e00 drivers/net/bonding/bond_main.c:2959 stack backtrace: CPU: 1 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Workqueue: bond0 bond_mii_monitor Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 lockdep_rcu_suspicious+0x140/0x1d0 kernel/locking/lockdep.c:6865 some_qdisc_is_busy net/sched/sch_generic.c:1332 [inline] dev_deactivate_many+0xa22/0xd40 net/sched/sch_generic.c:1383 dev_deactivate+0x118/0x1b0 net/sched/sch_generic.c:1398 linkwatch_do_dev+0x10f/0x170 net/core/link_watch.c:184 ethtool_op_get_link+0x15/0x70 net/ethtool/ioctl.c:63 bond_check_dev_link+0x444/0x6c0 drivers/net/bonding/bond_main.c:866 bond_miimon_inspect drivers/net/bonding/bond_main.c:2739 [inline] bond_mii_monitor+0x428/0x2e00 drivers/net/bonding/bond_main.c:2961 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ------------[ cut here ]------------ RTNL: assertion failed at ./include/net/netdev_lock.h (56) WARNING: CPU: 0 PID: 13 at ./include/net/netdev_lock.h:56 netdev_ops_assert_locked include/net/netdev_lock.h:56 [inline] WARNING: CPU: 0 PID: 13 at ./include/net/netdev_lock.h:56 netdev_ops_assert_locked_or_invisible include/net/netdev_lock.h:64 [inline] WARNING: CPU: 0 PID: 13 at ./include/net/netdev_lock.h:56 netif_state_change+0x317/0x3a0 net/core/dev.c:1523 Modules linked in: CPU: 0 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Workqueue: bond0 bond_mii_monitor RIP: 0010:netdev_ops_assert_locked include/net/netdev_lock.h:56 [inline] RIP: 0010:netdev_ops_assert_locked_or_invisible include/net/netdev_lock.h:64 [inline] RIP: 0010:netif_state_change+0x317/0x3a0 net/core/dev.c:1523 Code: 2f ff ff ff e8 1a 72 81 f8 c6 05 27 86 2a 06 01 90 48 c7 c7 80 08 70 8c 48 c7 c6 e8 06 79 8d ba 38 00 00 00 e8 ca cf 45 f8 90 <0f> 0b 90 90 e9 00 ff ff ff 44 89 f1 80 e1 07 38 c1 0f 8c 67 fd ff RSP: 0018:ffffc90000127640 EFLAGS: 00010246 RAX: 962df3bdb02c2d00 RBX: ffff88802d77a000 RCX: ffff88801b688000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 RBP: ffffc90000127710 R08: ffff8880b8823e93 R09: 1ffff110171047d2 R10: dffffc0000000000 R11: ffffed10171047d3 R12: 0000000000000000 R13: 1ffff92000024ecc R14: 0000000000000000 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881260cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055ad80e76950 CR3: 00000000339b8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: linkwatch_do_dev+0x117/0x170 net/core/link_watch.c:186 ethtool_op_get_link+0x15/0x70 net/ethtool/ioctl.c:63 bond_check_dev_link+0x444/0x6c0 drivers/net/bonding/bond_main.c:866 bond_miimon_inspect drivers/net/bonding/bond_main.c:2739 [inline] bond_mii_monitor+0x428/0x2e00 drivers/net/bonding/bond_main.c:2961 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245