8021q: adding VLAN 0 to HW filter on device bond0 ====================================================== WARNING: possible circular locking dependency detected 4.18.0-rc8+ #185 Not tainted ------------------------------------------------------ syz-executor2/6421 is trying to acquire lock: 00000000209b4e4b ((wq_completion)bond_dev->name){+.+.}, at: start_flush_work kernel/workqueue.c:2888 [inline] 00000000209b4e4b ((wq_completion)bond_dev->name){+.+.}, at: flush_work+0x4b8/0x900 kernel/workqueue.c:2917 but task is already holding lock: 00000000f0f3d47a (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (rtnl_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:757 [inline] __mutex_lock+0x176/0x1820 kernel/locking/mutex.c:894 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:909 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 bond_netdev_notify drivers/net/bonding/bond_main.c:1310 [inline] bond_netdev_notify_work+0x44/0xd0 drivers/net/bonding/bond_main.c:1320 process_one_work+0xc73/0x1ba0 kernel/workqueue.c:2153 worker_thread+0x189/0x13c0 kernel/workqueue.c:2296 kthread+0x345/0x410 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 -> #1 ((work_completion)(&(&nnw->work)->work)){+.+.}: process_one_work+0xc0b/0x1ba0 kernel/workqueue.c:2129 worker_thread+0x189/0x13c0 kernel/workqueue.c:2296 kthread+0x345/0x410 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 -> #0 ((wq_completion)bond_dev->name){+.+.}: lock_acquire+0x1e4/0x540 kernel/locking/lockdep.c:3924 start_flush_work kernel/workqueue.c:2889 [inline] flush_work+0x4dd/0x900 kernel/workqueue.c:2917 __cancel_work_timer+0x4bd/0x830 kernel/workqueue.c:2989 cancel_delayed_work_sync+0x1a/0x20 kernel/workqueue.c:3121 bond_work_cancel_all drivers/net/bonding/bond_main.c:3318 [inline] bond_close+0x1b/0x130 drivers/net/bonding/bond_main.c:3381 __dev_close_many+0x21e/0x380 net/core/dev.c:1476 __dev_close net/core/dev.c:1488 [inline] __dev_change_flags+0x38d/0x9c0 net/core/dev.c:6989 dev_change_flags+0x89/0x150 net/core/dev.c:7060 dev_ifsioc+0x84f/0xb30 net/core/dev_ioctl.c:237 dev_ioctl+0x1b5/0xcc0 net/core/dev_ioctl.c:493 sock_do_ioctl+0x1d3/0x3e0 net/socket.c:993 sock_ioctl+0x30d/0x680 net/socket.c:1094 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:684 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: (wq_completion)bond_dev->name --> (work_completion)(&(&nnw->work)->work) --> rtnl_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(rtnl_mutex); lock((work_completion)(&(&nnw->work)->work)); lock(rtnl_mutex); lock((wq_completion)bond_dev->name); *** DEADLOCK *** 1 lock held by syz-executor2/6421: #0: 00000000f0f3d47a (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 stack backtrace: CPU: 0 PID: 6421 Comm: syz-executor2 Not tainted 4.18.0-rc8+ #185 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 print_circular_bug.isra.36.cold.57+0x1bd/0x27d kernel/locking/lockdep.c:1227 check_prev_add kernel/locking/lockdep.c:1867 [inline] check_prevs_add kernel/locking/lockdep.c:1980 [inline] validate_chain kernel/locking/lockdep.c:2421 [inline] __lock_acquire+0x3449/0x5020 kernel/locking/lockdep.c:3435 lock_acquire+0x1e4/0x540 kernel/locking/lockdep.c:3924 start_flush_work kernel/workqueue.c:2889 [inline] flush_work+0x4dd/0x900 kernel/workqueue.c:2917 __cancel_work_timer+0x4bd/0x830 kernel/workqueue.c:2989 cancel_delayed_work_sync+0x1a/0x20 kernel/workqueue.c:3121 bond_work_cancel_all drivers/net/bonding/bond_main.c:3318 [inline] bond_close+0x1b/0x130 drivers/net/bonding/bond_main.c:3381 __dev_close_many+0x21e/0x380 net/core/dev.c:1476 __dev_close net/core/dev.c:1488 [inline] __dev_change_flags+0x38d/0x9c0 net/core/dev.c:6989 dev_change_flags+0x89/0x150 net/core/dev.c:7060 dev_ifsioc+0x84f/0xb30 net/core/dev_ioctl.c:237 dev_ioctl+0x1b5/0xcc0 net/core/dev_ioctl.c:493 sock_do_ioctl+0x1d3/0x3e0 net/socket.c:993 kernel msg: ebtables bug: please report to author: Wrong nr of counters sock_ioctl+0x30d/0x680 net/socket.c:1094 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:684 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fee7b2ccc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fee7b2cd6d4 RCX: 0000000000457089 RDX: 0000000020000140 RSI: 0000000000008914 RDI: 0000000000000004 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d19e0 R14: 00000000004c7454 R15: 0000000000000000 8021q: adding VLAN 0 to HW filter on device bond0 (unnamed net_device) (uninitialized): option miimon: invalid value (18446744073709551615) (unnamed net_device) (uninitialized): option miimon: allowed values 0 - 2147483647 (unnamed net_device) (uninitialized): option miimon: invalid value (18446744073709551615) (unnamed net_device) (uninitialized): option miimon: allowed values 0 - 2147483647 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 device bond0 left promiscuous mode IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device bond0