netlink: 'syz.4.6972': attribute type 10 has an invalid length. ====================================================== WARNING: possible circular locking dependency detected 6.11.0-rc1-syzkaller-00305-g91d516d4de48 #0 Not tainted ------------------------------------------------------ syz.4.6972/31665 is trying to acquire lock: ffff8880615b8768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:6014 [inline] ffff8880615b8768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: ieee80211_open+0xe7/0x200 net/mac80211/iface.c:449 but task is already holding lock: ffff88802ea14d40 (team->team_lock_key#15){+.+.}-{3:3}, at: team_add_slave+0xad/0x2760 drivers/net/team/team_core.c:1975 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (team->team_lock_key#15){+.+.}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759 __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_core.c:2950 team_device_event+0x161/0x5b0 drivers/net/team/team_core.c:2976 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:2032 [inline] call_netdevice_notifiers net/core/dev.c:2046 [inline] dev_close_many+0x33c/0x4c0 net/core/dev.c:1587 unregister_netdevice_many_notify+0x50b/0x1c40 net/core/dev.c:11319 macvlan_device_event+0x7e0/0x870 drivers/net/macvlan.c:1828 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:2032 [inline] call_netdevice_notifiers net/core/dev.c:2046 [inline] unregister_netdevice_many_notify+0xd81/0x1c40 net/core/dev.c:11344 unregister_netdevice_many net/core/dev.c:11406 [inline] unregister_netdevice_queue+0x303/0x370 net/core/dev.c:11281 unregister_netdevice include/linux/netdevice.h:3097 [inline] _cfg80211_unregister_wdev+0x162/0x560 net/wireless/core.c:1211 ieee80211_if_remove+0x25d/0x3a0 net/mac80211/iface.c:2227 ieee80211_del_iface+0x19/0x30 net/mac80211/cfg.c:202 rdev_del_virtual_intf net/wireless/rdev-ops.h:62 [inline] cfg80211_remove_virtual_intf+0x23f/0x410 net/wireless/util.c:2873 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597 ___sys_sendmsg net/socket.c:2651 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&rdev->wiphy.mtx){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3133 [inline] check_prevs_add kernel/locking/lockdep.c:3252 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3868 __lock_acquire+0x137a/0x2040 kernel/locking/lockdep.c:5142 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 wiphy_lock include/net/cfg80211.h:6014 [inline] ieee80211_open+0xe7/0x200 net/mac80211/iface.c:449 __dev_open+0x2d3/0x450 net/core/dev.c:1474 dev_open+0xae/0x1b0 net/core/dev.c:1510 team_port_add drivers/net/team/team_core.c:1216 [inline] team_add_slave+0x9c8/0x2760 drivers/net/team/team_core.c:1976 do_set_master net/core/rtnetlink.c:2701 [inline] do_setlink+0xe70/0x41f0 net/core/rtnetlink.c:2907 __rtnl_newlink net/core/rtnetlink.c:3696 [inline] rtnl_newlink+0x180d/0x20a0 net/core/rtnetlink.c:3743 rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6647 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597 ___sys_sendmsg net/socket.c:2651 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(team->team_lock_key#15); lock(&rdev->wiphy.mtx); lock(team->team_lock_key#15); lock(&rdev->wiphy.mtx); *** DEADLOCK *** 2 locks held by syz.4.6972/31665: #0: ffffffff8fc801c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fc801c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644 #1: ffff88802ea14d40 (team->team_lock_key#15){+.+.}-{3:3}, at: team_add_slave+0xad/0x2760 drivers/net/team/team_core.c:1975 stack backtrace: CPU: 0 UID: 0 PID: 31665 Comm: syz.4.6972 Not tainted 6.11.0-rc1-syzkaller-00305-g91d516d4de48 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2186 check_prev_add kernel/locking/lockdep.c:3133 [inline] check_prevs_add kernel/locking/lockdep.c:3252 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3868 __lock_acquire+0x137a/0x2040 kernel/locking/lockdep.c:5142 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 wiphy_lock include/net/cfg80211.h:6014 [inline] ieee80211_open+0xe7/0x200 net/mac80211/iface.c:449 __dev_open+0x2d3/0x450 net/core/dev.c:1474 dev_open+0xae/0x1b0 net/core/dev.c:1510 team_port_add drivers/net/team/team_core.c:1216 [inline] team_add_slave+0x9c8/0x2760 drivers/net/team/team_core.c:1976 do_set_master net/core/rtnetlink.c:2701 [inline] do_setlink+0xe70/0x41f0 net/core/rtnetlink.c:2907 __rtnl_newlink net/core/rtnetlink.c:3696 [inline] rtnl_newlink+0x180d/0x20a0 net/core/rtnetlink.c:3743 rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6647 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597 ___sys_sendmsg net/socket.c:2651 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f74b93779f9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f74ba083038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f74b9505f80 RCX: 00007f74b93779f9 RDX: 0000000000000000 RSI: 0000000020000600 RDI: 0000000000000008 RBP: 00007f74b93e58ee R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f74b9505f80 R15: 00007fffccac8e88 team0: Port device wlan1 added netlink: 'syz.4.6972': attribute type 10 has an invalid length.