============================= WARNING: suspicious RCU usage 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #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/u32:9/1146: #0: ffff88802ba3f148 ((wq_completion)bond0){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3204 #1: ffffc9000662fd80 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 #2: ffffffff8e1bb900 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #2: ffffffff8e1bb900 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffffffff8e1bb900 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x140/0x2d90 drivers/net/bonding/bond_main.c:2960 stack backtrace: CPU: 0 UID: 0 PID: 1146 Comm: kworker/u32:9 Not tainted 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: bond0 bond_mii_monitor Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120 lockdep_rcu_suspicious+0x210/0x3c0 kernel/locking/lockdep.c:6845 dev_deactivate_queue+0x167/0x190 net/sched/sch_generic.c:1290 netdev_for_each_tx_queue include/linux/netdevice.h:2562 [inline] dev_deactivate_many+0xe7/0xb20 net/sched/sch_generic.c:1363 dev_deactivate+0xf9/0x1c0 net/sched/sch_generic.c:1403 linkwatch_do_dev+0x11e/0x160 net/core/link_watch.c:180 linkwatch_sync_dev+0x181/0x210 net/core/link_watch.c:268 ethtool_op_get_link+0x1d/0x70 net/ethtool/ioctl.c:62 bond_check_dev_link+0x197/0x490 drivers/net/bonding/bond_main.c:873 bond_miimon_inspect drivers/net/bonding/bond_main.c:2740 [inline] bond_mii_monitor+0x3c1/0x2d90 drivers/net/bonding/bond_main.c:2962 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 ============================= WARNING: suspicious RCU usage 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #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/u32:9/1146: #0: ffff88802ba3f148 ((wq_completion)bond0){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3204 #1: ffffc9000662fd80 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 #2: ffffffff8e1bb900 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #2: ffffffff8e1bb900 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffffffff8e1bb900 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x140/0x2d90 drivers/net/bonding/bond_main.c:2960 stack backtrace: CPU: 0 UID: 0 PID: 1146 Comm: kworker/u32:9 Not tainted 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: bond0 bond_mii_monitor Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120 lockdep_rcu_suspicious+0x210/0x3c0 kernel/locking/lockdep.c:6845 dev_ingress_queue include/linux/rtnetlink.h:156 [inline] dev_deactivate_many+0x8af/0xb20 net/sched/sch_generic.c:1365 dev_deactivate+0xf9/0x1c0 net/sched/sch_generic.c:1403 linkwatch_do_dev+0x11e/0x160 net/core/link_watch.c:180 linkwatch_sync_dev+0x181/0x210 net/core/link_watch.c:268 ethtool_op_get_link+0x1d/0x70 net/ethtool/ioctl.c:62 bond_check_dev_link+0x197/0x490 drivers/net/bonding/bond_main.c:873 bond_miimon_inspect drivers/net/bonding/bond_main.c:2740 [inline] bond_mii_monitor+0x3c1/0x2d90 drivers/net/bonding/bond_main.c:2962 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 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:11403 in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 1146, name: kworker/u32:9 preempt_count: 0, expected: 0 RCU nest depth: 1, expected: 0 3 locks held by kworker/u32:9/1146: #0: ffff88802ba3f148 ((wq_completion)bond0){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3204 #1: ffffc9000662fd80 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 #2: ffffffff8e1bb900 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #2: ffffffff8e1bb900 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffffffff8e1bb900 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x140/0x2d90 drivers/net/bonding/bond_main.c:2960 CPU: 0 UID: 0 PID: 1146 Comm: kworker/u32:9 Not tainted 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: bond0 bond_mii_monitor Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120 __might_resched+0x3c0/0x5e0 kernel/sched/core.c:8758 synchronize_net+0x1b/0x60 net/core/dev.c:11403 dev_deactivate_many+0x2a1/0xb20 net/sched/sch_generic.c:1377 dev_deactivate+0xf9/0x1c0 net/sched/sch_generic.c:1403 linkwatch_do_dev+0x11e/0x160 net/core/link_watch.c:180 linkwatch_sync_dev+0x181/0x210 net/core/link_watch.c:268 ethtool_op_get_link+0x1d/0x70 net/ethtool/ioctl.c:62 bond_check_dev_link+0x197/0x490 drivers/net/bonding/bond_main.c:873 bond_miimon_inspect drivers/net/bonding/bond_main.c:2740 [inline] bond_mii_monitor+0x3c1/0x2d90 drivers/net/bonding/bond_main.c:2962 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 ============================= WARNING: suspicious RCU usage 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #0 Tainted: G W ----------------------------- kernel/rcu/tree_exp.h:946 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/u32:9/1146: #0: ffff88802ba3f148 ((wq_completion)bond0){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3204 #1: ffffc9000662fd80 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 #2: ffffffff8e1bb900 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #2: ffffffff8e1bb900 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffffffff8e1bb900 (rcu_read_lock){....}-{1:3}, at: bond_mii_monitor+0x140/0x2d90 drivers/net/bonding/bond_main.c:2960 stack backtrace: CPU: 0 UID: 0 PID: 1146 Comm: kworker/u32:9 Tainted: G W 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #0 Tainted: [W]=WARN Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: bond0 bond_mii_monitor Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120 lockdep_rcu_suspicious+0x210/0x3c0 kernel/locking/lockdep.c:6845 synchronize_rcu_expedited+0x1e5/0x450 kernel/rcu/tree_exp.h:946 synchronize_net+0x3e/0x60 net/core/dev.c:11405 dev_deactivate_many+0x2a1/0xb20 net/sched/sch_generic.c:1377 dev_deactivate+0xf9/0x1c0 net/sched/sch_generic.c:1403 linkwatch_do_dev+0x11e/0x160 net/core/link_watch.c:180 linkwatch_sync_dev+0x181/0x210 net/core/link_watch.c:268 ethtool_op_get_link+0x1d/0x70 net/ethtool/ioctl.c:62 bond_check_dev_link+0x197/0x490 drivers/net/bonding/bond_main.c:873 bond_miimon_inspect drivers/net/bonding/bond_main.c:2740 [inline] bond_mii_monitor+0x3c1/0x2d90 drivers/net/bonding/bond_main.c:2962 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 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: 3 PID: 1146 at kernel/rcu/tree_plugin.h:331 rcu_note_context_switch+0xc5c/0x1ae0 kernel/rcu/tree_plugin.h:331 Modules linked in: CPU: 3 UID: 0 PID: 1146 Comm: kworker/u32:9 Tainted: G W 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #0 Tainted: [W]=WARN Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: bond0 bond_mii_monitor RIP: 0010:rcu_note_context_switch+0xc5c/0x1ae0 kernel/rcu/tree_plugin.h:331 Code: 7b 00 4c 8b 54 24 30 48 8b 44 24 28 8b 4c 24 10 e9 c6 03 00 00 c6 05 2c 6f c6 0e 01 90 48 c7 c7 a0 ae 6e 8b e8 c5 e5 d8 ff 90 <0f> 0b 90 90 e9 a8 f4 ff ff 38 d0 7f 08 84 c0 0f 85 2b 08 00 00 80 RSP: 0018:ffffc9000662f4f8 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88806a93fb80 RCX: ffffffff815a5079 RDX: ffff888027524880 RSI: ffffffff815a5086 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000003 R12: ffff888027524880 R13: ffff888027524880 R14: ffff888027524880 R15: ffff88806a93ebc0 FS: 0000000000000000(0000) GS:ffff88806a900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f74726a56c0 CR3: 0000000030d2a000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __schedule+0x297/0x5ad0 kernel/sched/core.c:6661 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6848 exp_funnel_lock+0x344/0x3b0 kernel/rcu/tree_exp.h:320 synchronize_rcu_expedited+0x290/0x450 kernel/rcu/tree_exp.h:976 synchronize_net+0x3e/0x60 net/core/dev.c:11405 dev_deactivate_many+0x2a1/0xb20 net/sched/sch_generic.c:1377 dev_deactivate+0xf9/0x1c0 net/sched/sch_generic.c:1403 linkwatch_do_dev+0x11e/0x160 net/core/link_watch.c:180 linkwatch_sync_dev+0x181/0x210 net/core/link_watch.c:268 ethtool_op_get_link+0x1d/0x70 net/ethtool/ioctl.c:62 bond_check_dev_link+0x197/0x490 drivers/net/bonding/bond_main.c:873 bond_miimon_inspect drivers/net/bonding/bond_main.c:2740 [inline] bond_mii_monitor+0x3c1/0x2d90 drivers/net/bonding/bond_main.c:2962 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244