=============================
WARNING: suspicious RCU usage
6.14.0-syzkaller-12456-gacc4d5ff0b61 #0 Not tainted
-----------------------------
net/sched/sch_generic.c:1251 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/u8:2/36:
 #0: ffff88804d285148 ((wq_completion)bond0){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
 #0: ffff88804d285148 ((wq_completion)bond0){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
 #1: ffffc90000ad7c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
 #1: ffffc90000ad7c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
 #2: ffffffff8ed3dfe0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #2: ffffffff8ed3dfe0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #2: ffffffff8ed3dfe0 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x17f/0x3170 drivers/net/bonding/bond_main.c:2954

stack backtrace:
CPU: 1 UID: 0 PID: 36 Comm: kworker/u8:2 Not tainted 6.14.0-syzkaller-12456-gacc4d5ff0b61 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: bond0 bond_mii_monitor
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 lockdep_rcu_suspicious+0x175/0x200 kernel/locking/lockdep.c:6865
 dev_activate+0xff/0x1240 net/sched/sch_generic.c:1251
 linkwatch_do_dev+0xfb/0x170 net/core/link_watch.c:182
 ethtool_op_get_link+0x15/0x60 net/ethtool/ioctl.c:63
 bond_check_dev_link+0x1fb/0x4b0 drivers/net/bonding/bond_main.c:864
 bond_miimon_inspect drivers/net/bonding/bond_main.c:2734 [inline]
 bond_mii_monitor+0x49d/0x3170 drivers/net/bonding/bond_main.c:2956
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
 worker_thread+0x870/0xd50 kernel/workqueue.c:3400
 kthread+0x7b7/0x940 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
 </TASK>

=============================
WARNING: suspicious RCU usage
6.14.0-syzkaller-12456-gacc4d5ff0b61 #0 Not tainted
-----------------------------
net/sched/sch_generic.c:1229 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/u8:2/36:
 #0: ffff88804d285148 ((wq_completion)bond0){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
 #0: ffff88804d285148 ((wq_completion)bond0){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
 #1: ffffc90000ad7c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
 #1: ffffc90000ad7c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
 #2: ffffffff8ed3dfe0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #2: ffffffff8ed3dfe0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #2: ffffffff8ed3dfe0 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x17f/0x3170 drivers/net/bonding/bond_main.c:2954

stack backtrace:
CPU: 1 UID: 0 PID: 36 Comm: kworker/u8:2 Not tainted 6.14.0-syzkaller-12456-gacc4d5ff0b61 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: bond0 bond_mii_monitor
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 lockdep_rcu_suspicious+0x175/0x200 kernel/locking/lockdep.c:6865
 transition_one_qdisc+0x8e/0x1c0 net/sched/sch_generic.c:1229
 netdev_for_each_tx_queue include/linux/netdevice.h:2650 [inline]
 dev_activate+0x835/0x1240 net/sched/sch_generic.c:1259
 linkwatch_do_dev+0xfb/0x170 net/core/link_watch.c:182
 ethtool_op_get_link+0x15/0x60 net/ethtool/ioctl.c:63
 bond_check_dev_link+0x1fb/0x4b0 drivers/net/bonding/bond_main.c:864
 bond_miimon_inspect drivers/net/bonding/bond_main.c:2734 [inline]
 bond_mii_monitor+0x49d/0x3170 drivers/net/bonding/bond_main.c:2956
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
 worker_thread+0x870/0xd50 kernel/workqueue.c:3400
 kthread+0x7b7/0x940 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
 </TASK>

=============================
WARNING: suspicious RCU usage
6.14.0-syzkaller-12456-gacc4d5ff0b61 #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/u8:2/36:
 #0: ffff88804d285148 ((wq_completion)bond0){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
 #0: ffff88804d285148 ((wq_completion)bond0){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
 #1: ffffc90000ad7c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
 #1: ffffc90000ad7c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
 #2: ffffffff8ed3dfe0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #2: ffffffff8ed3dfe0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #2: ffffffff8ed3dfe0 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x17f/0x3170 drivers/net/bonding/bond_main.c:2954

stack backtrace:
CPU: 0 UID: 0 PID: 36 Comm: kworker/u8:2 Not tainted 6.14.0-syzkaller-12456-gacc4d5ff0b61 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: bond0 bond_mii_monitor
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 lockdep_rcu_suspicious+0x175/0x200 kernel/locking/lockdep.c:6865
 dev_ingress_queue include/linux/rtnetlink.h:163 [inline]
 dev_activate+0x922/0x1240 net/sched/sch_generic.c:1260
 linkwatch_do_dev+0xfb/0x170 net/core/link_watch.c:182
 ethtool_op_get_link+0x15/0x60 net/ethtool/ioctl.c:63
 bond_check_dev_link+0x1fb/0x4b0 drivers/net/bonding/bond_main.c:864
 bond_miimon_inspect drivers/net/bonding/bond_main.c:2734 [inline]
 bond_mii_monitor+0x49d/0x3170 drivers/net/bonding/bond_main.c:2956
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
 worker_thread+0x870/0xd50 kernel/workqueue.c:3400
 kthread+0x7b7/0x940 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
 </TASK>
------------[ cut here ]------------
RTNL: assertion failed at net/core/dev.c (2171)
WARNING: CPU: 1 PID: 36 at net/core/dev.c:2171 call_netdevice_notifiers_info+0x106/0x110 net/core/dev.c:2171
Modules linked in:
CPU: 1 UID: 0 PID: 36 Comm: kworker/u8:2 Not tainted 6.14.0-syzkaller-12456-gacc4d5ff0b61 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: bond0 bond_mii_monitor
RIP: 0010:call_netdevice_notifiers_info+0x106/0x110 net/core/dev.c:2171
Code: cc cc cc cc e8 bb 67 d9 f7 c6 05 36 cc 5f 06 01 90 48 c7 c7 e0 2b 50 8d 48 c7 c6 e0 2a 50 8d ba 7b 08 00 00 e8 2b 88 98 f7 90 <0f> 0b 90 90 e9 73 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000ad7638 EFLAGS: 00010246
RAX: b20ea253c0247e00 RBX: ffff88804d042000 RCX: ffff8881412d9e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff818279d2 R09: 1ffff110170c47d2
R10: dffffc0000000000 R11: ffffed10170c47d3 R12: 1ffff9200015aecc
R13: dffffc0000000000 R14: 0000000000000004 R15: ffffc90000ad7680
FS:  0000000000000000(0000) GS:ffff888125099000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000030a0cffc CR3: 000000002f05c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 netdev_state_change+0x123/0x1a0 net/core/dev.c:1536
 linkwatch_do_dev+0x112/0x170 net/core/link_watch.c:186
 ethtool_op_get_link+0x15/0x60 net/ethtool/ioctl.c:63
 bond_check_dev_link+0x1fb/0x4b0 drivers/net/bonding/bond_main.c:864
 bond_miimon_inspect drivers/net/bonding/bond_main.c:2734 [inline]
 bond_mii_monitor+0x49d/0x3170 drivers/net/bonding/bond_main.c:2956
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
 worker_thread+0x870/0xd50 kernel/workqueue.c:3400
 kthread+0x7b7/0x940 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
 </TASK>