device team0 left promiscuous mode device team_slave_0 left promiscuous mode device team_slave_1 left promiscuous mode device vlan4 left promiscuous mode device veth79 left promiscuous mode device veth139 left promiscuous mode ============================================ WARNING: possible recursive locking detected 5.8.0-rc2-syzkaller #0 Not tainted -------------------------------------------- kworker/u4:5/625 is trying to acquire lock: ffff888089f28280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: netif_addr_lock_nested include/linux/netdevice.h:4243 [inline] ffff888089f28280 (&vlan_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: ffff8880586e4280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:358 [inline] ffff8880586e4280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: netif_addr_lock_bh include/linux/netdevice.h:4248 [inline] ffff8880586e4280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_set_rx_mode net/core/dev.c:8212 [inline] ffff8880586e4280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_set_promiscuity+0xbb/0x100 net/core/dev.c:8120 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&vlan_netdev_addr_lock_key/1); lock(&vlan_netdev_addr_lock_key/1); *** DEADLOCK *** May be due to missing lock nesting notation 7 locks held by kworker/u4:5/625: #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: ffffc90002d27da8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 kernel/workqueue.c:2244 #2: ffffffff8a7a3270 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xa00 net/core/net_namespace.c:565 #3: ffffffff8a7b00e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock_unregistering net/core/dev.c:10557 [inline] #3: ffffffff8a7b00e8 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0xea/0x3d0 net/core/dev.c:10595 #4: ffff8880586e4280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:358 [inline] #4: ffff8880586e4280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: netif_addr_lock_bh include/linux/netdevice.h:4248 [inline] #4: ffff8880586e4280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_set_rx_mode net/core/dev.c:8212 [inline] #4: ffff8880586e4280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_set_promiscuity+0xbb/0x100 net/core/dev.c:8120 #5: ffff88805d332280 (&dev_addr_list_lock_key#2/2){+...}-{2:2}, at: netif_addr_lock_nested include/linux/netdevice.h:4243 [inline] #5: ffff88805d332280 (&dev_addr_list_lock_key#2/2){+...}-{2:2}, at: dev_mc_sync+0xdc/0x190 net/core/dev_addr_lists.c:861 #6: ffffffff89bbe640 (rcu_read_lock){....}-{1:2}, at: team_set_rx_mode+0x0/0x220 drivers/net/team/team.c:857 stack backtrace: CPU: 1 PID: 625 Comm: kworker/u4:5 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 print_deadlock_bug kernel/locking/lockdep.c:2391 [inline] check_deadlock kernel/locking/lockdep.c:2432 [inline] validate_chain kernel/locking/lockdep.c:3202 [inline] __lock_acquire.cold+0x178/0x3f8 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 team_set_rx_mode+0xce/0x220 drivers/net/team/team.c:1779 __dev_set_rx_mode+0x1ea/0x300 net/core/dev.c:8207 dev_mc_sync+0x155/0x190 net/core/dev_addr_lists.c:864 vlan_dev_set_rx_mode+0x38/0x80 net/8021q/vlan_dev.c:487 __dev_set_rx_mode+0x1ea/0x300 net/core/dev.c:8207 dev_set_rx_mode net/core/dev.c:8213 [inline] dev_set_promiscuity+0xc3/0x100 net/core/dev.c:8120 nbp_delete_promisc net/bridge/br_if.c:244 [inline] del_nbp+0x11b/0xd30 net/bridge/br_if.c:330 br_dev_delete+0x95/0x190 net/bridge/br_if.c:375 default_device_exit_batch+0x22f/0x3d0 net/core/dev.c:10599 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 bridge1: port 2(vlan1) entered disabled state device bond0 left promiscuous mode device bond_slave_0 left promiscuous mode device bond_slave_1 left promiscuous mode bridge1: port 1(bond0) entered disabled state device hsr_slave_0 left promiscuous mode device hsr_slave_1 left promiscuous mode batman_adv: batadv0: Interface deactivated: batadv_slave_0 batman_adv: batadv0: Removing interface: batadv_slave_0 batman_adv: batadv0: Interface deactivated: batadv_slave_1 batman_adv: batadv0: Removing interface: batadv_slave_1 batman_adv: batadv0: Removing interface: veth15 batman_adv: batadv0: Removing interface: veth25 device bridge_slave_1 left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state device veth0_macvtap left promiscuous mode device veth1_vlan left promiscuous mode bond14 (unregistering): (slave bridge15): Releasing active interface bond14 (unregistering): (slave bridge14): Releasing active interface device bridge14 left promiscuous mode bond14 (unregistering): Released all slaves bond13 (unregistering): Released all slaves team0 (unregistering): Port device veth139 removed bond12 (unregistering): Released all slaves bond11 (unregistering): Released all slaves bond10 (unregistering): Released all slaves bond9 (unregistering): Released all slaves bond8 (unregistering): Released all slaves bond7 (unregistering): Released all slaves bond6 (unregistering): Released all slaves bond5 (unregistering): Released all slaves bond4 (unregistering): (slave bridge7): Releasing backup interface bond4 (unregistering): Released all slaves team0 (unregistering): Port device vlan4 removed bond3 (unregistering): Released all slaves bond2 (unregistering): (slave bridge2): Releasing active interface device bridge2 left promiscuous mode bond2 (unregistering): Released all slaves bond1 (unregistering): Released all slaves team0 (unregistering): Port device team_slave_1 removed team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): (slave bond_slave_1): Releasing backup interface bond0 (unregistering): (slave bond_slave_0): Releasing backup interface bond0 (unregistering): Released all slaves tipc: TX() has been purged, node left! tipc: TX() has been purged, node left! tipc: TX() has been purged, node left! tipc: TX() has been purged, node left!