=============================
WARNING: suspicious RCU usage
6.15.0-rc1-syzkaller-00065-g3b07108ada81 #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/u8:7/4843:
 #0: ffff88805dcec148 ((wq_completion)bond0#3){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
 #1: ffffc9000f5e7d18 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
 #2: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #2: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #2: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x134/0x2dc0 drivers/net/bonding/bond_main.c:2954

stack backtrace:
CPU: 1 UID: 0 PID: 4843 Comm: kworker/u8:7 Not tainted 6.15.0-rc1-syzkaller-00065-g3b07108ada81 #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+0x16c/0x1f0 lib/dump_stack.c:120
 lockdep_rcu_suspicious+0x166/0x260 kernel/locking/lockdep.c:6865
 dev_activate+0x45c/0x12d0 net/sched/sch_generic.c:1251
 linkwatch_do_dev+0x13d/0x160 net/core/link_watch.c:182
 linkwatch_sync_dev+0x181/0x210 net/core/link_watch.c:272
 ethtool_op_get_link+0x1d/0x70 net/ethtool/ioctl.c:63
 bond_check_dev_link+0x196/0x480 drivers/net/bonding/bond_main.c:864
 bond_miimon_inspect drivers/net/bonding/bond_main.c:2734 [inline]
 bond_mii_monitor+0x3c0/0x2dc0 drivers/net/bonding/bond_main.c:2956
 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c2/0x780 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

=============================
WARNING: suspicious RCU usage
6.15.0-rc1-syzkaller-00065-g3b07108ada81 #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/u8:7/4843:
 #0: ffff88805dcec148 ((wq_completion)bond0#3){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
 #1: ffffc9000f5e7d18 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
 #2: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #2: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #2: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x134/0x2dc0 drivers/net/bonding/bond_main.c:2954

stack backtrace:
CPU: 1 UID: 0 PID: 4843 Comm: kworker/u8:7 Not tainted 6.15.0-rc1-syzkaller-00065-g3b07108ada81 #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+0x16c/0x1f0 lib/dump_stack.c:120
 lockdep_rcu_suspicious+0x166/0x260 kernel/locking/lockdep.c:6865
 transition_one_qdisc+0x1d4/0x210 net/sched/sch_generic.c:1229
 netdev_for_each_tx_queue include/linux/netdevice.h:2650 [inline]
 dev_activate+0x216/0x12d0 net/sched/sch_generic.c:1259
 linkwatch_do_dev+0x13d/0x160 net/core/link_watch.c:182
 linkwatch_sync_dev+0x181/0x210 net/core/link_watch.c:272
 ethtool_op_get_link+0x1d/0x70 net/ethtool/ioctl.c:63
 bond_check_dev_link+0x196/0x480 drivers/net/bonding/bond_main.c:864
 bond_miimon_inspect drivers/net/bonding/bond_main.c:2734 [inline]
 bond_mii_monitor+0x3c0/0x2dc0 drivers/net/bonding/bond_main.c:2956
 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c2/0x780 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

=============================
WARNING: suspicious RCU usage
6.15.0-rc1-syzkaller-00065-g3b07108ada81 #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/u8:7/4843:
 #0: ffff88805dcec148 ((wq_completion)bond0#3){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
 #1: ffffc9000f5e7d18 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
 #2: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #2: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #2: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x134/0x2dc0 drivers/net/bonding/bond_main.c:2954

stack backtrace:
CPU: 1 UID: 0 PID: 4843 Comm: kworker/u8:7 Not tainted 6.15.0-rc1-syzkaller-00065-g3b07108ada81 #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+0x16c/0x1f0 lib/dump_stack.c:120
 lockdep_rcu_suspicious+0x166/0x260 kernel/locking/lockdep.c:6865
 dev_ingress_queue include/linux/rtnetlink.h:163 [inline]
 dev_activate+0x7f8/0x12d0 net/sched/sch_generic.c:1260
 linkwatch_do_dev+0x13d/0x160 net/core/link_watch.c:182
 linkwatch_sync_dev+0x181/0x210 net/core/link_watch.c:272
 ethtool_op_get_link+0x1d/0x70 net/ethtool/ioctl.c:63
 bond_check_dev_link+0x196/0x480 drivers/net/bonding/bond_main.c:864
 bond_miimon_inspect drivers/net/bonding/bond_main.c:2734 [inline]
 bond_mii_monitor+0x3c0/0x2dc0 drivers/net/bonding/bond_main.c:2956
 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c2/0x780 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 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 (2174)
WARNING: CPU: 1 PID: 4843 at net/core/dev.c:2174 call_netdevice_notifiers_info+0x112/0x140 net/core/dev.c:2174
Modules linked in:
CPU: 1 UID: 0 PID: 4843 Comm: kworker/u8:7 Not tainted 6.15.0-rc1-syzkaller-00065-g3b07108ada81 #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+0x112/0x140 net/core/dev.c:2174
Code: 84 ed 75 89 e8 df 67 70 f8 c6 05 b5 e4 23 07 01 90 ba 7e 08 00 00 48 c7 c6 c0 be c0 8c 48 c7 c7 00 bf c0 8c e8 2f f9 2f f8 90 <0f> 0b 90 90 e9 5a ff ff ff 48 89 df e8 4d cd d5 f8 e9 08 ff ff ff
RSP: 0018:ffffc9000f5e78f8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffffc9000f5e7940 RCX: ffffffff817ad098
RDX: ffff888035d48000 RSI: ffffffff817ad0a5 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000004
R13: ffff88805e61a000 R14: ffff88805e3bc6a8 R15: ffffffff9012fa60
FS:  0000000000000000(0000) GS:ffff888124ab3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000bd000 CR3: 0000000034468000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 netdev_state_change net/core/dev.c:1536 [inline]
 netdev_state_change+0x113/0x150 net/core/dev.c:1529
 linkwatch_do_dev+0x12b/0x160 net/core/link_watch.c:186
 linkwatch_sync_dev+0x181/0x210 net/core/link_watch.c:272
 ethtool_op_get_link+0x1d/0x70 net/ethtool/ioctl.c:63
 bond_check_dev_link+0x196/0x480 drivers/net/bonding/bond_main.c:864
 bond_miimon_inspect drivers/net/bonding/bond_main.c:2734 [inline]
 bond_mii_monitor+0x3c0/0x2dc0 drivers/net/bonding/bond_main.c:2956
 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c2/0x780 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>