=============================
WARNING: suspicious RCU usage
6.14.0-syzkaller-09584-g7d06015d936c #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/u8:8/5112:
 #0: ffff88805e19a948 ((wq_completion)bond0){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
 #0: ffff88805e19a948 ((wq_completion)bond0){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
 #1: ffffc900109f7c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
 #1: ffffc900109f7c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
 #2: ffffffff8ed3a2a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #2: ffffffff8ed3a2a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #2: ffffffff8ed3a2a0 (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: 5112 Comm: kworker/u8:8 Not tainted 6.14.0-syzkaller-09584-g7d06015d936c #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:6862
 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-09584-g7d06015d936c #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/u8:8/5112:
 #0: ffff88805e19a948 ((wq_completion)bond0){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
 #0: ffff88805e19a948 ((wq_completion)bond0){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
 #1: ffffc900109f7c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
 #1: ffffc900109f7c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
 #2: ffffffff8ed3a2a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #2: ffffffff8ed3a2a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #2: ffffffff8ed3a2a0 (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: 5112 Comm: kworker/u8:8 Not tainted 6.14.0-syzkaller-09584-g7d06015d936c #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:6862
 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-09584-g7d06015d936c #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/u8:8/5112:
 #0: ffff88805e19a948 ((wq_completion)bond0){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
 #0: ffff88805e19a948 ((wq_completion)bond0){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
 #1: ffffc900109f7c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
 #1: ffffc900109f7c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
 #2: ffffffff8ed3a2a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #2: ffffffff8ed3a2a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #2: ffffffff8ed3a2a0 (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: 5112 Comm: kworker/u8:8 Not tainted 6.14.0-syzkaller-09584-g7d06015d936c #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:6862
 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>
BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1523
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 5112, name: kworker/u8:8
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
3 locks held by kworker/u8:8/5112:
 #0: ffff88805e19a948 ((wq_completion)bond0){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
 #0: ffff88805e19a948 ((wq_completion)bond0){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
 #1: ffffc900109f7c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
 #1: ffffc900109f7c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
 #2: ffffffff8ed3a2a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #2: ffffffff8ed3a2a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #2: ffffffff8ed3a2a0 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x17f/0x3170 drivers/net/bonding/bond_main.c:2954
CPU: 1 UID: 0 PID: 5112 Comm: kworker/u8:8 Not tainted 6.14.0-syzkaller-09584-g7d06015d936c #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
 __might_resched+0x558/0x6c0 kernel/sched/core.c:8818
 down_read+0x90/0xa50 kernel/locking/rwsem.c:1523
 wireless_nlevent_flush net/wireless/wext-core.c:351 [inline]
 wext_netdev_notifier_call+0x1f/0x120 net/wireless/wext-core.c:371
 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85
 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>

=============================
[ BUG: Invalid wait context ]
6.14.0-syzkaller-09584-g7d06015d936c #0 Tainted: G        W         
-----------------------------
kworker/u8:8/5112 is trying to lock:
ffffffff900e67d0 (net_rwsem){++++}-{4:4}, at: wireless_nlevent_flush net/wireless/wext-core.c:351 [inline]
ffffffff900e67d0 (net_rwsem){++++}-{4:4}, at: wext_netdev_notifier_call+0x1f/0x120 net/wireless/wext-core.c:371
other info that might help us debug this:
context-{5:5}
3 locks held by kworker/u8:8/5112:
 #0: ffff88805e19a948 ((wq_completion)bond0){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
 #0: ffff88805e19a948 ((wq_completion)bond0){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
 #1: ffffc900109f7c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
 #1: ffffc900109f7c60 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
 #2: ffffffff8ed3a2a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #2: ffffffff8ed3a2a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #2: ffffffff8ed3a2a0 (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: 5112 Comm: kworker/u8:8 Tainted: G        W          6.14.0-syzkaller-09584-g7d06015d936c #0 PREEMPT(full) 
Tainted: [W]=WARN
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
 print_lock_invalid_wait_context kernel/locking/lockdep.c:4831 [inline]
 check_wait_context kernel/locking/lockdep.c:4903 [inline]
 __lock_acquire+0xc30/0xd80 kernel/locking/lockdep.c:5185
 lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866
 down_read+0xb3/0xa50 kernel/locking/rwsem.c:1524
 wireless_nlevent_flush net/wireless/wext-core.c:351 [inline]
 wext_netdev_notifier_call+0x1f/0x120 net/wireless/wext-core.c:371
 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85
 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>
BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:321
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 5112, name: kworker/u8:8
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
INFO: lockdep is turned off.
CPU: 0 UID: 0 PID: 5112 Comm: kworker/u8:8 Tainted: G        W          6.14.0-syzkaller-09584-g7d06015d936c #0 PREEMPT(full) 
Tainted: [W]=WARN
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
 __might_resched+0x558/0x6c0 kernel/sched/core.c:8818
 might_alloc include/linux/sched/mm.h:321 [inline]
 slab_pre_alloc_hook mm/slub.c:4089 [inline]
 slab_alloc_node mm/slub.c:4167 [inline]
 kmem_cache_alloc_node_noprof+0x6e/0x3b0 mm/slub.c:4239
 __alloc_skb+0x1c2/0x480 net/core/skbuff.c:658
 alloc_skb include/linux/skbuff.h:1340 [inline]
 nlmsg_new include/net/netlink.h:1019 [inline]
 rtmsg_ifinfo_build_skb+0x84/0x260 net/core/rtnetlink.c:4397
 rtmsg_ifinfo_event net/core/rtnetlink.c:4439 [inline]
 rtmsg_ifinfo+0x91/0x1b0 net/core/rtnetlink.c:4448
 netdev_state_change+0x13d/0x1a0 net/core/dev.c:1538
 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>
bond0: (slave team0): link status definitely up, 0 Mbps full duplex
bond0: active interface up!