batman_adv: batadv0: Interface deactivated: veth71 batman_adv: batadv0: Removing interface: veth71 device bridge_slave_1 left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state ============================================ WARNING: possible recursive locking detected 5.8.0-rc2-syzkaller #0 Not tainted -------------------------------------------- kworker/u4:3/10071 is trying to acquire lock: ffff88805bb38280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: netif_addr_lock_nested include/linux/netdevice.h:4243 [inline] ffff88805bb38280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_mc_unsync net/core/dev_addr_lists.c:915 [inline] ffff88805bb38280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_mc_unsync+0xf4/0x190 net/core/dev_addr_lists.c:909 but task is already holding lock: ffff888057b3c280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:358 [inline] ffff888057b3c280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: netif_addr_lock_bh include/linux/netdevice.h:4248 [inline] ffff888057b3c280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_mc_unsync net/core/dev_addr_lists.c:914 [inline] ffff888057b3c280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_mc_unsync+0xb0/0x190 net/core/dev_addr_lists.c:909 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 5 locks held by kworker/u4:3/10071: #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: ffffc90003d9fda8 (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: ffff888057b3c280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:358 [inline] #4: ffff888057b3c280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: netif_addr_lock_bh include/linux/netdevice.h:4248 [inline] #4: ffff888057b3c280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_mc_unsync net/core/dev_addr_lists.c:914 [inline] #4: ffff888057b3c280 (&vlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_mc_unsync+0xb0/0x190 net/core/dev_addr_lists.c:909 stack backtrace: CPU: 1 PID: 10071 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 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_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 device veth61 left promiscuous mode device veth41 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 bond15 (unregistering): Released all slaves bond14 (unregistering): Released all slaves bond13 (unregistering): Released all slaves bond12 (unregistering): (slave bridge88): Removing an active aggregator bond12 (unregistering): (slave bridge88): Releasing backup interface bond12 (unregistering): Released all slaves bond11 (unregistering): Released all slaves bond10 (unregistering): (slave bridge86): Releasing active interface device bridge83 entered promiscuous mode bond10 (unregistering): (slave bridge85): Releasing active interface bond10 (unregistering): (slave bridge84): Releasing active interface bond10 (unregistering): (slave bridge83): Releasing active interface device bridge83 left promiscuous mode bond10 (unregistering): Released all slaves bond9 (unregistering): Released all slaves bond8 (unregistering): Released all slaves bond7 (unregistering): (slave wireguard2): Releasing backup interface bond7 (unregistering): (slave wireguard1): Releasing backup interface bond7 (unregistering): (slave wireguard0): Releasing backup interface bond7 (unregistering): Destroying bond invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 10071 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 RIP: 0010:rollback_registered_many+0x2be/0xf60 net/core/dev.c:8947 Code: 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 0f 85 91 0c 00 00 48 b8 22 01 00 00 00 00 ad de 48 89 43 70 e9 b9 fe ff ff e8 12 0b 3e fb <0f> 0b 4c 8d 7b 68 4c 8d 6b 70 eb a5 e8 01 0b 3e fb 48 8b 74 24 10 RSP: 0018:ffffc90003d9f6b0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff8880525f8000 RCX: ffffffff863543e8 RDX: ffff8880a78e44c0 RSI: ffffffff8635453e RDI: 0000000000000001 RBP: ffffc90003d9f770 R08: 0000000000000000 R09: ffffffff8a7b0887 R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8880525f8068 R14: ffffc90003d9f718 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcd16e9c000 CR3: 00000000930c1000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rollback_registered net/core/dev.c:9021 [inline] unregister_netdevice_queue+0x2dd/0x570 net/core/dev.c:10102 unregister_netdevice include/linux/netdevice.h:2754 [inline] bond_release_and_destroy drivers/net/bonding/bond_main.c:2201 [inline] bond_slave_netdev_event drivers/net/bonding/bond_main.c:3274 [inline] bond_netdev_event.cold+0xc1/0x10e drivers/net/bonding/bond_main.c:3387 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2033 call_netdevice_notifiers_extack net/core/dev.c:2045 [inline] call_netdevice_notifiers net/core/dev.c:2059 [inline] rollback_registered_many+0x665/0xf60 net/core/dev.c:8976 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 Modules linked in: ---[ end trace e1ab2db09297f761 ]--- RIP: 0010:rollback_registered_many+0x2be/0xf60 net/core/dev.c:8947 Code: 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 0f 85 91 0c 00 00 48 b8 22 01 00 00 00 00 ad de 48 89 43 70 e9 b9 fe ff ff e8 12 0b 3e fb <0f> 0b 4c 8d 7b 68 4c 8d 6b 70 eb a5 e8 01 0b 3e fb 48 8b 74 24 10 RSP: 0018:ffffc90003d9f6b0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff8880525f8000 RCX: ffffffff863543e8 RDX: ffff8880a78e44c0 RSI: ffffffff8635453e RDI: 0000000000000001 RBP: ffffc90003d9f770 R08: 0000000000000000 R09: ffffffff8a7b0887 R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8880525f8068 R14: ffffc90003d9f718 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcd16e9c000 CR3: 00000000a6570000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400