device bridge_slave_1 left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state ====================================================== WARNING: possible circular locking dependency detected 5.8.0-rc2-syzkaller #0 Not tainted ------------------------------------------------------ kworker/u4:3/91 is trying to acquire lock: ffff8880a25c8280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: netif_addr_lock_nested include/linux/netdevice.h:4243 [inline] ffff8880a25c8280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_uc_unsync net/core/dev_addr_lists.c:694 [inline] ffff8880a25c8280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_uc_unsync+0xf4/0x190 net/core/dev_addr_lists.c:688 but task is already holding lock: ffff8880a74f2280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:358 [inline] ffff8880a74f2280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: netif_addr_lock_bh include/linux/netdevice.h:4248 [inline] ffff8880a74f2280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_uc_unsync net/core/dev_addr_lists.c:693 [inline] ffff8880a74f2280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_uc_unsync+0xb0/0x190 net/core/dev_addr_lists.c:688 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}: _raw_spin_lock_nested+0x30/0x40 kernel/locking/spinlock.c:361 netif_addr_lock_nested include/linux/netdevice.h:4243 [inline] dev_mc_unsync net/core/dev_addr_lists.c:915 [inline] dev_mc_unsync+0xf4/0x190 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 -> #0 (&vlan_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_unsync net/core/dev_addr_lists.c:694 [inline] dev_uc_unsync+0xf4/0x190 net/core/dev_addr_lists.c:688 macvlan_stop+0xfe/0x4c0 drivers/net/macvlan.c:678 __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(&macvlan_netdev_addr_lock_key/1); lock(&vlan_netdev_addr_lock_key/1); lock(&macvlan_netdev_addr_lock_key/1); lock(&vlan_netdev_addr_lock_key/1); *** DEADLOCK *** 5 locks held by kworker/u4:3/91: #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: ffffc90000e57da8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 kernel/workqueue.c:2244 #2: ffffffff8a7a4930 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xa00 net/core/net_namespace.c:565 #3: ffffffff8a7b17a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock_unregistering net/core/dev.c:10557 [inline] #3: ffffffff8a7b17a8 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0xea/0x3d0 net/core/dev.c:10595 #4: ffff8880a74f2280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:358 [inline] #4: ffff8880a74f2280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: netif_addr_lock_bh include/linux/netdevice.h:4248 [inline] #4: ffff8880a74f2280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_uc_unsync net/core/dev_addr_lists.c:693 [inline] #4: ffff8880a74f2280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_uc_unsync+0xb0/0x190 net/core/dev_addr_lists.c:688 stack backtrace: CPU: 1 PID: 91 Comm: kworker/u4:3 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_unsync net/core/dev_addr_lists.c:694 [inline] dev_uc_unsync+0xf4/0x190 net/core/dev_addr_lists.c:688 macvlan_stop+0xfe/0x4c0 drivers/net/macvlan.c:678 __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_to_batadv left promiscuous mode device veth0_to_team left promiscuous mode device veth1_to_bridge left promiscuous mode device veth0 left promiscuous mode device veth1_macvtap left promiscuous mode device veth0_macvtap left promiscuous mode device veth1_vlan left promiscuous mode device veth0_vlan left promiscuous mode bond0 (unregistering): (slave macvlan60): Releasing backup interface bond0 (unregistering): (slave macvlan59): Releasing backup interface bond0 (unregistering): (slave macvlan58): Releasing backup interface bond0 (unregistering): (slave macvlan57): Releasing backup interface bond0 (unregistering): (slave macvlan56): Releasing backup interface bond0 (unregistering): (slave macvlan55): Releasing backup interface bond0 (unregistering): (slave macvlan54): Releasing backup interface bond0 (unregistering): (slave macvlan53): Releasing backup interface bond0 (unregistering): (slave macvlan52): Releasing backup interface bond0 (unregistering): (slave macvlan51): Releasing backup interface bond0 (unregistering): (slave macvlan50): Releasing backup interface bond0 (unregistering): (slave macvlan49): Releasing backup interface bond0 (unregistering): (slave macvlan48): Releasing backup interface bond0 (unregistering): (slave macvlan47): Releasing backup interface bond0 (unregistering): (slave macvlan46): Releasing backup interface bond0 (unregistering): (slave macvlan45): Releasing backup interface bond0 (unregistering): (slave macvlan44): Releasing backup interface bond0 (unregistering): (slave macvlan43): Releasing backup interface bond0 (unregistering): (slave macvlan42): Releasing backup interface bond0 (unregistering): (slave macvlan41): Releasing backup interface bond0 (unregistering): (slave macvlan40): Releasing backup interface bond0 (unregistering): (slave macvlan39): Releasing backup interface bond0 (unregistering): (slave macvlan38): Releasing backup interface bond0 (unregistering): (slave macvlan37): Releasing backup interface bond0 (unregistering): (slave macvlan36): Releasing backup interface bond0 (unregistering): (slave macvlan35): Releasing backup interface bond0 (unregistering): (slave macvlan34): Releasing backup interface bond0 (unregistering): (slave macvlan33): Releasing backup interface bond0 (unregistering): (slave macvlan32): Releasing backup interface bond0 (unregistering): (slave macvlan31): Releasing backup interface bond0 (unregistering): (slave macvlan30): Releasing backup interface bond0 (unregistering): (slave macvlan29): Releasing backup interface bond0 (unregistering): (slave macvlan28): Releasing backup interface bond0 (unregistering): (slave macvlan27): Releasing backup interface bond0 (unregistering): (slave macvlan26): Releasing backup interface bond0 (unregistering): (slave macvlan25): Releasing backup interface bond0 (unregistering): (slave macvlan24): Releasing backup interface bond0 (unregistering): (slave macvlan23): Releasing backup interface bond0 (unregistering): (slave macvlan22): Releasing backup interface bond0 (unregistering): (slave macvlan21): Releasing backup interface bond0 (unregistering): (slave macvlan20): Releasing backup interface bond0 (unregistering): (slave macvlan19): Releasing backup interface bond0 (unregistering): (slave macvlan18): Releasing backup interface bond0 (unregistering): (slave macvlan17): Releasing backup interface bond0 (unregistering): (slave macvlan16): Releasing backup interface bond0 (unregistering): (slave macvlan15): Releasing backup interface bond0 (unregistering): (slave macvlan14): Releasing backup interface bond0 (unregistering): (slave macvlan13): Releasing backup interface bond0 (unregistering): (slave macvlan12): Releasing backup interface bond0 (unregistering): (slave macvlan11): Releasing backup interface bond0 (unregistering): (slave macvlan10): Releasing backup interface bond0 (unregistering): (slave macvlan9): Releasing backup interface bond0 (unregistering): (slave macvlan8): Releasing backup interface bond0 (unregistering): (slave macvlan7): Releasing backup interface bond0 (unregistering): (slave macvlan6): Releasing backup interface bond0 (unregistering): (slave macvlan5): Releasing backup interface bond0 (unregistering): (slave macvlan4): Releasing backup interface bond0 (unregistering): (slave macvlan3): Releasing backup interface bond0 (unregistering): (slave macvlan2): Releasing backup interface 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