============================= WARNING: suspicious RCU usage 6.12.0-next-20241128-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/u8:0/11: #0: ffff888143f91148 ((wq_completion)bond0#5){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff888143f91148 ((wq_completion)bond0#5){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc90000107d00 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90000107d00 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffffffff8e937b20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #2: ffffffff8e937b20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffffffff8e937b20 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x174/0x3170 drivers/net/bonding/bond_main.c:2960 stack backtrace: CPU: 1 UID: 0 PID: 11 Comm: kworker/u8:0 Not tainted 6.12.0-next-20241128-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: bond0 bond_mii_monitor Call Trace: __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:6845 dev_deactivate_queue+0x8f/0x160 net/sched/sch_generic.c:1290 netdev_for_each_tx_queue include/linux/netdevice.h:2562 [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+0x1f1/0x3f0 drivers/net/bonding/bond_main.c:873 bond_miimon_inspect drivers/net/bonding/bond_main.c:2740 [inline] bond_mii_monitor+0x49a/0x3170 drivers/net/bonding/bond_main.c:2962 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 ============================= WARNING: suspicious RCU usage 6.12.0-next-20241128-syzkaller #0 Not tainted ----------------------------- ./include/linux/rtnetlink.h:156 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/u8:0/11: #0: ffff888143f91148 ((wq_completion)bond0#5){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff888143f91148 ((wq_completion)bond0#5){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc90000107d00 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90000107d00 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffffffff8e937b20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #2: ffffffff8e937b20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffffffff8e937b20 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x174/0x3170 drivers/net/bonding/bond_main.c:2960 stack backtrace: CPU: 0 UID: 0 PID: 11 Comm: kworker/u8:0 Not tainted 6.12.0-next-20241128-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: bond0 bond_mii_monitor Call Trace: __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:6845 dev_ingress_queue include/linux/rtnetlink.h:156 [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+0x1f1/0x3f0 drivers/net/bonding/bond_main.c:873 bond_miimon_inspect drivers/net/bonding/bond_main.c:2740 [inline] bond_mii_monitor+0x49a/0x3170 drivers/net/bonding/bond_main.c:2962 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 BUG: sleeping function called from invalid context at net/core/dev.c:11397 in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 11, name: kworker/u8:0 preempt_count: 0, expected: 0 RCU nest depth: 1, expected: 0 3 locks held by kworker/u8:0/11: #0: ffff888143f91148 ((wq_completion)bond0#5){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff888143f91148 ((wq_completion)bond0#5){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc90000107d00 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90000107d00 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffffffff8e937b20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #2: ffffffff8e937b20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffffffff8e937b20 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x174/0x3170 drivers/net/bonding/bond_main.c:2960 CPU: 0 UID: 0 PID: 11 Comm: kworker/u8:0 Not tainted 6.12.0-next-20241128-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: bond0 bond_mii_monitor Call Trace: __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:8758 synchronize_net+0x1b/0x50 net/core/dev.c:11397 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+0x1f1/0x3f0 drivers/net/bonding/bond_main.c:873 bond_miimon_inspect drivers/net/bonding/bond_main.c:2740 [inline] bond_mii_monitor+0x49a/0x3170 drivers/net/bonding/bond_main.c:2962 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 ============================= WARNING: suspicious RCU usage 6.12.0-next-20241128-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/u8:0/11: #0: ffff888143f91148 ((wq_completion)bond0#5){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff888143f91148 ((wq_completion)bond0#5){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc90000107d00 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90000107d00 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffffffff8e937b20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #2: ffffffff8e937b20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffffffff8e937b20 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x174/0x3170 drivers/net/bonding/bond_main.c:2960 stack backtrace: CPU: 0 UID: 0 PID: 11 Comm: kworker/u8:0 Tainted: G W 6.12.0-next-20241128-syzkaller #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: bond0 bond_mii_monitor Call Trace: __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:6845 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+0x1f1/0x3f0 drivers/net/bonding/bond_main.c:873 bond_miimon_inspect drivers/net/bonding/bond_main.c:2740 [inline] bond_mii_monitor+0x49a/0x3170 drivers/net/bonding/bond_main.c:2962 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 ------------[ cut here ]------------ Voluntary context switch within RCU read-side critical section! WARNING: CPU: 0 PID: 11 at kernel/rcu/tree_plugin.h:331 rcu_note_context_switch+0xcf4/0xff0 kernel/rcu/tree_plugin.h:331 Modules linked in: CPU: 0 UID: 0 PID: 11 Comm: kworker/u8:0 Tainted: G W 6.12.0-next-20241128-syzkaller #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 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 13 fe ff 4c 8b b4 24 80 00 00 00 eb 91 c6 05 b8 df 7d 0e 01 90 48 c7 c7 40 ec 0b 8c e8 bd 2f 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:ffffc90000107100 EFLAGS: 00010046 RAX: 4d3bb30a66c3e300 RBX: ffff88801cecc044 RCX: ffff88801cecbc00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000107250 R08: ffffffff81601ea2 R09: fffffbfff1cfa220 R10: dffffc0000000000 R11: fffffbfff1cfa220 R12: ffff88801cecbc00 R13: 0000000000000000 R14: 1ffff92000020e38 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9eed283d28 CR3: 000000007c6b4000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __schedule+0x34b/0x4c30 kernel/sched/core.c:6661 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 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+0x1f1/0x3f0 drivers/net/bonding/bond_main.c:873 bond_miimon_inspect drivers/net/bonding/bond_main.c:2740 [inline] bond_mii_monitor+0x49a/0x3170 drivers/net/bonding/bond_main.c:2962 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244