veth0_vlan: left promiscuous mode veth0_vlan: entered promiscuous mode team0: Device veth0_vlan failed to register rx_handler ============================================ WARNING: possible recursive locking detected 6.8.0-rc6-syzkaller-00149-gb7fb7729c94f #0 Not tainted -------------------------------------------- syz-executor.2/5140 is trying to acquire lock: ffff88801e904d00 (team->team_lock_key#81){+.+.}-{3:3}, at: team_port_change_check+0x51/0x1e0 drivers/net/team/team.c:2997 but task is already holding lock: ffff88801e904d00 (team->team_lock_key#81){+.+.}-{3:3}, at: team_add_slave+0xad/0x2750 drivers/net/team/team.c:1974 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(team->team_lock_key#81); lock(team->team_lock_key#81); *** DEADLOCK *** May be due to missing lock nesting notation 2 locks held by syz-executor.2/5140: #0: ffffffff8f375cc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f375cc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 #1: ffff88801e904d00 (team->team_lock_key#81){+.+.}-{3:3}, at: team_add_slave+0xad/0x2750 drivers/net/team/team.c:1974 stack backtrace: CPU: 1 PID: 5140 Comm: syz-executor.2 Not tainted 6.8.0-rc6-syzkaller-00149-gb7fb7729c94f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106 check_deadlock kernel/locking/lockdep.c:3062 [inline] validate_chain+0x15c0/0x58e0 kernel/locking/lockdep.c:3856 __lock_acquire+0x1345/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 team_port_change_check+0x51/0x1e0 drivers/net/team/team.c:2997 team_device_event+0x161/0x5b0 drivers/net/team/team.c:3023 notifier_call_chain+0x18f/0x3b0 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:2004 [inline] call_netdevice_notifiers net/core/dev.c:2018 [inline] dev_close_many+0x33c/0x4c0 net/core/dev.c:1559 vlan_device_event+0x18b7/0x1de0 net/8021q/vlan.c:449 notifier_call_chain+0x18f/0x3b0 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:2004 [inline] call_netdevice_notifiers net/core/dev.c:2018 [inline] dev_close_many+0x33c/0x4c0 net/core/dev.c:1559 dev_close+0x1c0/0x2c0 net/core/dev.c:1581 team_port_add drivers/net/team/team.c:1312 [inline] team_add_slave+0x1aef/0x2750 drivers/net/team/team.c:1975 do_set_master net/core/rtnetlink.c:2707 [inline] do_setlink+0xe58/0x41c0 net/core/rtnetlink.c:2913 rtnl_setlink+0x40d/0x5a0 net/core/rtnetlink.c:3209 rtnetlink_rcv_msg+0x885/0x1040 net/core/rtnetlink.c:6617 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1367 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 sock_write_iter+0x2dd/0x400 net/socket.c:1160 do_iter_readv_writev+0x46c/0x640 vfs_writev+0x395/0xbb0 fs/read_write.c:971 do_writev+0x1b1/0x350 fs/read_write.c:1018 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7efe46a7dda9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007efe478020c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007efe46babf80 RCX: 00007efe46a7dda9 RDX: 0000000000000001 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 00007efe46aca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007efe46babf80 R15: 00007ffe8805d2b8