batman_adv: batadv0: Removing interface: batadv_slave_0 batman_adv: batadv0: Removing interface: veth152 batman_adv: batadv0: Removing interface: veth178 batman_adv: batadv0: Removing interface: veth203 device bond10 left promiscuous mode device veth182 left promiscuous mode ====================================================== WARNING: possible circular locking dependency detected 5.8.0-rc2-syzkaller #0 Not tainted ------------------------------------------------------ kworker/u4:6/8166 is trying to acquire lock: ffff88804d882280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: netif_addr_lock_nested include/linux/netdevice.h:4243 [inline] ffff88804d882280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_uc_sync_multiple+0xdc/0x190 net/core/dev_addr_lists.c:670 but task is already holding lock: ffff88805d56c280 (&dev_addr_list_lock_key/2){+...}-{2:2}, at: netif_addr_lock_nested include/linux/netdevice.h:4243 [inline] ffff88805d56c280 (&dev_addr_list_lock_key/2){+...}-{2:2}, at: dev_mc_unsync net/core/dev_addr_lists.c:915 [inline] ffff88805d56c280 (&dev_addr_list_lock_key/2){+...}-{2:2}, at: dev_mc_unsync+0xf4/0x190 net/core/dev_addr_lists.c:909 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&dev_addr_list_lock_key/2){+...}-{2:2}: _raw_spin_lock_nested+0x30/0x40 kernel/locking/spinlock.c:361 netif_addr_lock_nested include/linux/netdevice.h:4243 [inline] dev_uc_sync+0xdc/0x190 net/core/dev_addr_lists.c:640 macvlan_set_mac_lists+0x55/0x110 drivers/net/macvlan.c:802 __dev_set_rx_mode+0x1ea/0x300 net/core/dev.c:8207 dev_set_rx_mode net/core/dev.c:8213 [inline] __dev_open+0x321/0x470 net/core/dev.c:1529 dev_open net/core/dev.c:1557 [inline] dev_open+0xe8/0x150 net/core/dev.c:1550 bond_enslave+0x927/0x48a0 drivers/net/bonding/bond_main.c:1714 do_set_master+0x1c8/0x220 net/core/rtnetlink.c:2476 __rtnl_newlink+0x132f/0x1730 net/core/rtnetlink.c:3366 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3397 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5460 netlink_rcv_skb+0x15a/0x430 net/netlink/af_netlink.c:2469 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2352 ___sys_sendmsg+0xf3/0x170 net/socket.c:2406 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2439 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 -> #0 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}: check_prev_add kernel/locking/lockdep.c:2496 [inline] check_prevs_add kernel/locking/lockdep.c:2601 [inline] validate_chain kernel/locking/lockdep.c:3218 [inline] __lock_acquire+0x2acb/0x56e0 kernel/locking/lockdep.c:4380 lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:4959 _raw_spin_lock_nested+0x30/0x40 kernel/locking/spinlock.c:361 netif_addr_lock_nested include/linux/netdevice.h:4243 [inline] dev_uc_sync_multiple+0xdc/0x190 net/core/dev_addr_lists.c:670 bond_set_rx_mode+0x1ae/0x480 drivers/net/bonding/bond_main.c:3846 __dev_set_rx_mode+0x1ea/0x300 net/core/dev.c:8207 dev_mc_unsync net/core/dev_addr_lists.c:917 [inline] dev_mc_unsync+0x139/0x190 net/core/dev_addr_lists.c:909 vlan_dev_stop+0x51/0x350 net/8021q/vlan_dev.c:315 __dev_close_many+0x1b3/0x2e0 net/core/dev.c:1605 dev_close_many+0x238/0x650 net/core/dev.c:1630 rollback_registered_many+0x3af/0xf60 net/core/dev.c:8953 unregister_netdevice_many.part.0+0x1a/0x2f0 net/core/dev.c:10121 unregister_netdevice_many net/core/dev.c:10120 [inline] default_device_exit_batch+0x30c/0x3d0 net/core/dev.c:10604 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:189 cleanup_net+0x4ea/0xa00 net/core/net_namespace.c:603 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&dev_addr_list_lock_key/2); lock(&macvlan_netdev_addr_lock_key/1); lock(&dev_addr_list_lock_key/2); lock(&macvlan_netdev_addr_lock_key/1); *** DEADLOCK *** 7 locks held by kworker/u4:6/8166: #0: ffff8880a97ad138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880a97ad138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff8880a97ad138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8880a97ad138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff8880a97ad138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff8880a97ad138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 kernel/workqueue.c:2240 #1: ffffc900171a7da8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 kernel/workqueue.c:2244 #2: ffffffff8a7a3a70 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xa00 net/core/net_namespace.c:565 #3: ffffffff8a7b08e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock_unregistering net/core/dev.c:10557 [inline] #3: ffffffff8a7b08e8 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0xea/0x3d0 net/core/dev.c:10595 #4: ffff88805842c280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:358 [inline] #4: ffff88805842c280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: netif_addr_lock_bh include/linux/netdevice.h:4248 [inline] #4: ffff88805842c280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_mc_unsync net/core/dev_addr_lists.c:914 [inline] #4: ffff88805842c280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_mc_unsync+0xb0/0x190 net/core/dev_addr_lists.c:909 #5: ffff88805d56c280 (&dev_addr_list_lock_key/2){+...}-{2:2}, at: netif_addr_lock_nested include/linux/netdevice.h:4243 [inline] #5: ffff88805d56c280 (&dev_addr_list_lock_key/2){+...}-{2:2}, at: dev_mc_unsync net/core/dev_addr_lists.c:915 [inline] #5: ffff88805d56c280 (&dev_addr_list_lock_key/2){+...}-{2:2}, at: dev_mc_unsync+0xf4/0x190 net/core/dev_addr_lists.c:909 #6: ffffffff89bbe640 (rcu_read_lock){....}-{1:2}, at: bond_set_rx_mode+0x0/0x480 drivers/net/bonding/bond_main.c:930 stack backtrace: CPU: 0 PID: 8166 Comm: kworker/u4:6 Not tainted 5.8.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 check_noncircular+0x324/0x3e0 kernel/locking/lockdep.c:1827 check_prev_add kernel/locking/lockdep.c:2496 [inline] check_prevs_add kernel/locking/lockdep.c:2601 [inline] validate_chain kernel/locking/lockdep.c:3218 [inline] __lock_acquire+0x2acb/0x56e0 kernel/locking/lockdep.c:4380 lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:4959 _raw_spin_lock_nested+0x30/0x40 kernel/locking/spinlock.c:361 netif_addr_lock_nested include/linux/netdevice.h:4243 [inline] dev_uc_sync_multiple+0xdc/0x190 net/core/dev_addr_lists.c:670 bond_set_rx_mode+0x1ae/0x480 drivers/net/bonding/bond_main.c:3846 __dev_set_rx_mode+0x1ea/0x300 net/core/dev.c:8207 dev_mc_unsync net/core/dev_addr_lists.c:917 [inline] dev_mc_unsync+0x139/0x190 net/core/dev_addr_lists.c:909 vlan_dev_stop+0x51/0x350 net/8021q/vlan_dev.c:315 __dev_close_many+0x1b3/0x2e0 net/core/dev.c:1605 dev_close_many+0x238/0x650 net/core/dev.c:1630 rollback_registered_many+0x3af/0xf60 net/core/dev.c:8953 unregister_netdevice_many.part.0+0x1a/0x2f0 net/core/dev.c:10121 unregister_netdevice_many net/core/dev.c:10120 [inline] default_device_exit_batch+0x30c/0x3d0 net/core/dev.c:10604 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:189 cleanup_net+0x4ea/0xa00 net/core/net_namespace.c:603 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 device veth1_macvtap left promiscuous mode device veth0_macvtap left promiscuous mode device veth1_vlan left promiscuous mode device veth0_vlan left promiscuous mode bond19 (unregistering): Released all slaves bond0 (unregistering): (slave bond18): Releasing backup interface device bond18 left promiscuous mode bond18 (unregistering): Released all slaves bond0 (unregistering): (slave macvlan6): Releasing backup interface bond17 (unregistering): Released all slaves bond16 (unregistering): Released all slaves bond15 (unregistering): Released all slaves bond14 (unregistering): Released all slaves bond13 (unregistering): Released all slaves bond12 (unregistering): Released all slaves bond11 (unregistering): Released all slaves bond10 (unregistering): Released all slaves bond9 (unregistering): (slave bridge4): Releasing active interface bond9 (unregistering): Released all slaves bond8 (unregistering): Released all slaves bond0 (unregistering): (slave bond7): Releasing backup interface device bond7 left promiscuous mode bond7 (unregistering): Released all slaves bond6 (unregistering): Released all slaves bond5 (unregistering): Released all slaves bond4 (unregistering): Released all slaves bond3 (unregistering): Released all slaves bond2 (unregistering): (slave bridge1): Releasing backup interface device bridge1 left promiscuous mode bond2 (unregistering): Released all slaves bond1 (unregistering): Released all slaves