batman_adv: batadv0: Interface deactivated: batadv_slave_1 batman_adv: batadv0: Removing interface: batadv_slave_1 batman_adv: batadv0: Removing interface: macsec1 batman_adv: batadv0: Removing interface: macsec2 rdma_rxe: ignoring netdev event = 10 for virt_wifi0 device virt_wifi0 left promiscuous mode ============================================ WARNING: possible recursive locking detected 5.8.0-rc2-syzkaller #0 Not tainted -------------------------------------------- kworker/u4:2/39 is trying to acquire lock: ffff88804ea2a280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: netif_addr_lock_nested include/linux/netdevice.h:4243 [inline] ffff88804ea2a280 (&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: ffff88808dd50280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:358 [inline] ffff88808dd50280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: netif_addr_lock_bh include/linux/netdevice.h:4248 [inline] ffff88808dd50280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_uc_unsync net/core/dev_addr_lists.c:693 [inline] ffff88808dd50280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_uc_unsync+0xb0/0x190 net/core/dev_addr_lists.c:688 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&macvlan_netdev_addr_lock_key/1); lock(&macvlan_netdev_addr_lock_key/1); *** DEADLOCK *** May be due to missing lock nesting notation 7 locks held by kworker/u4:2/39: #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: ffffc90000ea7da8 (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: ffff88808dd50280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:358 [inline] #4: ffff88808dd50280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: netif_addr_lock_bh include/linux/netdevice.h:4248 [inline] #4: ffff88808dd50280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_uc_unsync net/core/dev_addr_lists.c:693 [inline] #4: ffff88808dd50280 (&macvlan_netdev_addr_lock_key/1){+...}-{2:2}, at: dev_uc_unsync+0xb0/0x190 net/core/dev_addr_lists.c:688 #5: ffff88806642c280 (&dev_addr_list_lock_key/2){+...}-{2:2}, at: netif_addr_lock_nested include/linux/netdevice.h:4243 [inline] #5: ffff88806642c280 (&dev_addr_list_lock_key/2){+...}-{2:2}, at: dev_uc_unsync net/core/dev_addr_lists.c:694 [inline] #5: ffff88806642c280 (&dev_addr_list_lock_key/2){+...}-{2:2}, at: dev_uc_unsync+0xf4/0x190 net/core/dev_addr_lists.c:688 #6: ffffffff89bbe640 (rcu_read_lock){....}-{1:2}, at: bond_set_rx_mode+0x0/0x480 drivers/net/bonding/bond_main.c:930 stack backtrace: CPU: 1 PID: 39 Comm: kworker/u4:2 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 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_uc_unsync net/core/dev_addr_lists.c:696 [inline] dev_uc_unsync+0x139/0x190 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_macvtap left promiscuous mode device veth0_macvtap left promiscuous mode device veth1_vlan left promiscuous mode device veth0_vlan left promiscuous mode infiniband syz0: set down device veth236 left promiscuous mode team0 (unregistering): Port device veth236 removed bond12 (unregistering): Released all slaves bond11 (unregistering): (slave bridge14): Releasing active interface bond11 (unregistering): Released all slaves bond10 (unregistering): Released all slaves bond0 (unregistering): (slave macvlan8): Releasing backup interface device macvlan8 left promiscuous mode bond9 (unregistering): Released all slaves bond8 (unregistering): Released all slaves bond7 (unregistering): Released all slaves bond6 (unregistering): Released all slaves device veth127 left promiscuous mode team0 (unregistering): Port device veth127 removed bond5 (unregistering): Released all slaves bond4 (unregistering): (slave bridge4): Releasing backup interface bond4 (unregistering): Released all slaves bond3 (unregistering): Released all slaves bond2 (unregistering): Released all slaves device bond1 left promiscuous mode team0 (unregistering): Port device bond1 removed bond1 (unregistering): Released all slaves device team_slave_1 left promiscuous mode team0 (unregistering): Port device team_slave_1 removed device team_slave_0 left promiscuous mode team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): (slave bond_slave_1): Releasing backup interface device bond_slave_1 left promiscuous mode bond0 (unregistering): (slave bond_slave_0): Releasing backup interface device bond_slave_0 left promiscuous mode bond0 (unregistering): Released all slaves