=============================
WARNING: suspicious RCU usage
6.12.0-syzkaller #0 Not tainted
-----------------------------
net/sched/sch_generic.c:1290 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/u8:8/3458:
 #0: ffff88807dfc1948 ((wq_completion)bond0#18){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
 #0: ffff88807dfc1948 ((wq_completion)bond0#18){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: ffffc9000c6ffd00 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc9000c6ffd00 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #2: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #2: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: bond_mii_monitor+0x174/0x3170 drivers/net/bonding/bond_main.c:2951

stack backtrace:
CPU: 0 UID: 0 PID: 3458 Comm: kworker/u8:8 Not tainted 6.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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+0x226/0x340 kernel/locking/lockdep.c:6821
 dev_deactivate_queue+0x8f/0x160 net/sched/sch_generic.c:1290
 netdev_for_each_tx_queue include/linux/netdevice.h:2504 [inline]
 dev_deactivate_many+0xc8/0xb10 net/sched/sch_generic.c:1363
 dev_deactivate+0x184/0x280 net/sched/sch_generic.c:1403
 linkwatch_do_dev+0x10a/0x170 net/core/link_watch.c:175
 ethtool_op_get_link+0x15/0x60 net/ethtool/ioctl.c:62
 bond_check_dev_link+0x1f3/0x3f0 drivers/net/bonding/bond_main.c:873
 bond_miimon_inspect drivers/net/bonding/bond_main.c:2731 [inline]
 bond_mii_monitor+0x49a/0x3170 drivers/net/bonding/bond_main.c:2953
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

=============================
WARNING: suspicious RCU usage
6.12.0-syzkaller #0 Not tainted
-----------------------------
include/linux/rtnetlink.h:100 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/u8:8/3458:
 #0: ffff88807dfc1948 ((wq_completion)bond0#18){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
 #0: ffff88807dfc1948 ((wq_completion)bond0#18){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: ffffc9000c6ffd00 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc9000c6ffd00 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #2: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #2: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: bond_mii_monitor+0x174/0x3170 drivers/net/bonding/bond_main.c:2951

stack backtrace:
CPU: 1 UID: 0 PID: 3458 Comm: kworker/u8:8 Not tainted 6.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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+0x226/0x340 kernel/locking/lockdep.c:6821
 dev_ingress_queue include/linux/rtnetlink.h:100 [inline]
 dev_deactivate_many+0x18f/0xb10 net/sched/sch_generic.c:1365
 dev_deactivate+0x184/0x280 net/sched/sch_generic.c:1403
 linkwatch_do_dev+0x10a/0x170 net/core/link_watch.c:175
 ethtool_op_get_link+0x15/0x60 net/ethtool/ioctl.c:62
 bond_check_dev_link+0x1f3/0x3f0 drivers/net/bonding/bond_main.c:873
 bond_miimon_inspect drivers/net/bonding/bond_main.c:2731 [inline]
 bond_mii_monitor+0x49a/0x3170 drivers/net/bonding/bond_main.c:2953
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
BUG: sleeping function called from invalid context at net/core/dev.c:11284
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 3458, name: kworker/u8:8
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
3 locks held by kworker/u8:8/3458:
 #0: ffff88807dfc1948 ((wq_completion)bond0#18){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
 #0: ffff88807dfc1948 ((wq_completion)bond0#18){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: ffffc9000c6ffd00 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc9000c6ffd00 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #2: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #2: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: bond_mii_monitor+0x174/0x3170 drivers/net/bonding/bond_main.c:2951
CPU: 0 UID: 0 PID: 3458 Comm: kworker/u8:8 Not tainted 6.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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
 __might_resched+0x5d4/0x780 kernel/sched/core.c:8656
 synchronize_net+0x1b/0x50 net/core/dev.c:11284
 dev_deactivate_many+0x4a7/0xb10 net/sched/sch_generic.c:1377
 dev_deactivate+0x184/0x280 net/sched/sch_generic.c:1403
 linkwatch_do_dev+0x10a/0x170 net/core/link_watch.c:175
 ethtool_op_get_link+0x15/0x60 net/ethtool/ioctl.c:62
 bond_check_dev_link+0x1f3/0x3f0 drivers/net/bonding/bond_main.c:873
 bond_miimon_inspect drivers/net/bonding/bond_main.c:2731 [inline]
 bond_mii_monitor+0x49a/0x3170 drivers/net/bonding/bond_main.c:2953
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

=============================
WARNING: suspicious RCU usage
6.12.0-syzkaller #0 Tainted: G        W         
-----------------------------
kernel/rcu/tree_exp.h:949 Illegal synchronize_rcu_expedited() in RCU read-side critical section!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
3 locks held by kworker/u8:8/3458:
 #0: ffff88807dfc1948 ((wq_completion)bond0#18){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
 #0: ffff88807dfc1948 ((wq_completion)bond0#18){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: ffffc9000c6ffd00 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc9000c6ffd00 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #2: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #2: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: bond_mii_monitor+0x174/0x3170 drivers/net/bonding/bond_main.c:2951

stack backtrace:
CPU: 1 UID: 0 PID: 3458 Comm: kworker/u8:8 Tainted: G        W          6.12.0-syzkaller #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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+0x226/0x340 kernel/locking/lockdep.c:6821
 synchronize_rcu_expedited+0x12e/0x830 kernel/rcu/tree_exp.h:946
 dev_deactivate_many+0x4a7/0xb10 net/sched/sch_generic.c:1377
 dev_deactivate+0x184/0x280 net/sched/sch_generic.c:1403
 linkwatch_do_dev+0x10a/0x170 net/core/link_watch.c:175
 ethtool_op_get_link+0x15/0x60 net/ethtool/ioctl.c:62
 bond_check_dev_link+0x1f3/0x3f0 drivers/net/bonding/bond_main.c:873
 bond_miimon_inspect drivers/net/bonding/bond_main.c:2731 [inline]
 bond_mii_monitor+0x49a/0x3170 drivers/net/bonding/bond_main.c:2953
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
BUG: sleeping function called from invalid context at kernel/rcu/tree.c:4003
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 3458, name: kworker/u8:8
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
3 locks held by kworker/u8:8/3458:
 #0: ffff88807dfc1948 ((wq_completion)bond0#18){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
 #0: ffff88807dfc1948 ((wq_completion)bond0#18){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: ffffc9000c6ffd00 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc9000c6ffd00 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #2: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #2: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: bond_mii_monitor+0x174/0x3170 drivers/net/bonding/bond_main.c:2951
CPU: 0 UID: 0 PID: 3458 Comm: kworker/u8:8 Tainted: G        W          6.12.0-syzkaller #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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
 __might_resched+0x5d4/0x780 kernel/sched/core.c:8656
 rcu_blocking_is_gp kernel/rcu/tree.c:4003 [inline]
 synchronize_rcu_expedited+0x148/0x830 kernel/rcu/tree_exp.h:952
 dev_deactivate_many+0x4a7/0xb10 net/sched/sch_generic.c:1377
 dev_deactivate+0x184/0x280 net/sched/sch_generic.c:1403
 linkwatch_do_dev+0x10a/0x170 net/core/link_watch.c:175
 ethtool_op_get_link+0x15/0x60 net/ethtool/ioctl.c:62
 bond_check_dev_link+0x1f3/0x3f0 drivers/net/bonding/bond_main.c:873
 bond_miimon_inspect drivers/net/bonding/bond_main.c:2731 [inline]
 bond_mii_monitor+0x49a/0x3170 drivers/net/bonding/bond_main.c:2953
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
------------[ cut here ]------------
Voluntary context switch within RCU read-side critical section!
WARNING: CPU: 1 PID: 3458 at kernel/rcu/tree_plugin.h:331 rcu_note_context_switch+0xcf4/0xff0 kernel/rcu/tree_plugin.h:331
Modules linked in:
CPU: 1 UID: 0 PID: 3458 Comm: kworker/u8:8 Tainted: G        W          6.12.0-syzkaller #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Workqueue: bond0 bond_mii_monitor
RIP: 0010:rcu_note_context_switch+0xcf4/0xff0 kernel/rcu/tree_plugin.h:331
Code: 00 ba 02 00 00 00 e8 7b f8 fd ff 4c 8b b4 24 80 00 00 00 eb 91 c6 05 aa 13 8b 0e 01 90 48 c7 c7 60 28 0c 8c e8 3d 2a da ff 90 <0f> 0b 90 90 e9 3b f4 ff ff 90 0f 0b 90 45 84 ed 0f 84 00 f4 ff ff
RSP: 0018:ffffc9000c6ff100 EFLAGS: 00010046
RAX: 605a7324726f4c00 RBX: ffff888032265e44 RCX: ffff888032265a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000c6ff250 R08: ffffffff8155e312 R09: fffffbfff1cf9ff8
R10: dffffc0000000000 R11: fffffbfff1cf9ff8 R12: ffff888032265a00
R13: 0000000000000000 R14: 1ffff920018dfe38 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020b03000 CR3: 0000000034182000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __schedule+0x34b/0x4c30 kernel/sched/core.c:6573
 __schedule_loop kernel/sched/core.c:6770 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6785
 exp_funnel_lock kernel/rcu/tree_exp.h:320 [inline]
 synchronize_rcu_expedited+0x70a/0x830 kernel/rcu/tree_exp.h:976
 dev_deactivate_many+0x4a7/0xb10 net/sched/sch_generic.c:1377
 dev_deactivate+0x184/0x280 net/sched/sch_generic.c:1403
 linkwatch_do_dev+0x10a/0x170 net/core/link_watch.c:175
 ethtool_op_get_link+0x15/0x60 net/ethtool/ioctl.c:62
 bond_check_dev_link+0x1f3/0x3f0 drivers/net/bonding/bond_main.c:873
 bond_miimon_inspect drivers/net/bonding/bond_main.c:2731 [inline]
 bond_mii_monitor+0x49a/0x3170 drivers/net/bonding/bond_main.c:2953
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>