====================================================== WARNING: possible circular locking dependency detected 6.9.0-rc5-syzkaller-00042-ge88c4cfcb7b8 #0 Not tainted ------------------------------------------------------ syz-executor.0/5481 is trying to acquire lock: ffff88807fa8cd20 (team->team_lock_key){+.+.}-{3:3}, at: team_del_slave+0x2e/0x1c0 drivers/net/team/team.c:1988 but task is already holding lock: ffff88802be60768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: nl80211_del_interface+0x116/0x130 net/wireless/nl80211.c:4389 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&rdev->wiphy.mtx){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x132/0xd60 kernel/locking/mutex.c:752 wiphy_lock include/net/cfg80211.h:5953 [inline] ieee80211_open+0xe3/0x1f0 net/mac80211/iface.c:449 __dev_open+0x2cf/0x440 net/core/dev.c:1430 dev_open+0xaa/0x1b0 net/core/dev.c:1466 team_port_add drivers/net/team/team.c:1214 [inline] team_add_slave+0x9af/0x2740 drivers/net/team/team.c:1974 do_set_master net/core/rtnetlink.c:2685 [inline] do_setlink+0xe6c/0x41e0 net/core/rtnetlink.c:2891 rtnl_setlink+0x409/0x5a0 net/core/rtnetlink.c:3185 rtnetlink_rcv_msg+0x897/0x10d0 net/core/rtnetlink.c:6595 netlink_rcv_skb+0x1df/0x430 net/netlink/af_netlink.c:2559 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x7e6/0x980 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x8dd/0xcb0 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x521/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2ac/0x3a0 net/socket.c:2667 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x84/0x190 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e -> #0 (team->team_lock_key){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x3a1f/0x7fa0 kernel/locking/lockdep.c:5137 lock_acquire+0x1e9/0x540 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x132/0xd60 kernel/locking/mutex.c:752 team_del_slave+0x2e/0x1c0 drivers/net/team/team.c:1988 team_device_event+0x1fc/0x5b0 drivers/net/team/team.c:3029 notifier_call_chain+0x19f/0x3d0 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:1988 [inline] call_netdevice_notifiers net/core/dev.c:2002 [inline] unregister_netdevice_many_notify+0xd8f/0x16b0 net/core/dev.c:11105 unregister_netdevice_many net/core/dev.c:11163 [inline] unregister_netdevice_queue+0x2ff/0x370 net/core/dev.c:11042 unregister_netdevice include/linux/netdevice.h:3115 [inline] _cfg80211_unregister_wdev+0x162/0x560 net/wireless/core.c:1206 ieee80211_if_remove+0x259/0x3a0 net/mac80211/iface.c:2242 ieee80211_del_iface+0x15/0x20 net/mac80211/cfg.c:202 rdev_del_virtual_intf net/wireless/rdev-ops.h:62 [inline] cfg80211_remove_virtual_intf+0x23b/0x400 net/wireless/util.c:2847 genl_family_rcv_msg_doit net/netlink/genetlink.c:1113 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1193 [inline] genl_rcv_msg+0xb10/0xec0 net/netlink/genetlink.c:1208 netlink_rcv_skb+0x1df/0x430 net/netlink/af_netlink.c:2559 genl_rcv+0x24/0x40 net/netlink/genetlink.c:1217 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x7e6/0x980 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x8dd/0xcb0 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x521/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2ac/0x3a0 net/socket.c:2667 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x84/0x190 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&rdev->wiphy.mtx); lock(team->team_lock_key); lock(&rdev->wiphy.mtx); lock(team->team_lock_key); *** DEADLOCK *** 3 locks held by syz-executor.0/5481: #0: ffffffff8ef85a30 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:1216 #1: ffffffff8ef20d48 (rtnl_mutex){+.+.}-{3:3}, at: nl80211_pre_doit+0x5b/0x8b0 net/wireless/nl80211.c:16401 #2: ffff88802be60768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: nl80211_del_interface+0x116/0x130 net/wireless/nl80211.c:4389 stack backtrace: CPU: 1 PID: 5481 Comm: syz-executor.0 Not tainted 6.9.0-rc5-syzkaller-00042-ge88c4cfcb7b8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x23d/0x360 lib/dump_stack.c:114 check_noncircular+0x375/0x4a0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x3a1f/0x7fa0 kernel/locking/lockdep.c:5137 lock_acquire+0x1e9/0x540 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x132/0xd60 kernel/locking/mutex.c:752 team_del_slave+0x2e/0x1c0 drivers/net/team/team.c:1988 team_device_event+0x1fc/0x5b0 drivers/net/team/team.c:3029 notifier_call_chain+0x19f/0x3d0 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:1988 [inline] call_netdevice_notifiers net/core/dev.c:2002 [inline] unregister_netdevice_many_notify+0xd8f/0x16b0 net/core/dev.c:11105 unregister_netdevice_many net/core/dev.c:11163 [inline] unregister_netdevice_queue+0x2ff/0x370 net/core/dev.c:11042 unregister_netdevice include/linux/netdevice.h:3115 [inline] _cfg80211_unregister_wdev+0x162/0x560 net/wireless/core.c:1206 ieee80211_if_remove+0x259/0x3a0 net/mac80211/iface.c:2242 ieee80211_del_iface+0x15/0x20 net/mac80211/cfg.c:202 rdev_del_virtual_intf net/wireless/rdev-ops.h:62 [inline] cfg80211_remove_virtual_intf+0x23b/0x400 net/wireless/util.c:2847 genl_family_rcv_msg_doit net/netlink/genetlink.c:1113 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1193 [inline] genl_rcv_msg+0xb10/0xec0 net/netlink/genetlink.c:1208 netlink_rcv_skb+0x1df/0x430 net/netlink/af_netlink.c:2559 genl_rcv+0x24/0x40 net/netlink/genetlink.c:1217 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x7e6/0x980 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x8dd/0xcb0 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x521/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2ac/0x3a0 net/socket.c:2667 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x84/0x190 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7fa763e7dda9 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:00007fa764c850c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fa763fac050 RCX: 00007fa763e7dda9 RDX: 0000000000000000 RSI: 0000000020000400 RDI: 0000000000000004 RBP: 00007fa763eca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fa763fac050 R15: 00007ffcd22fa7c8 team0: Port device wlan0 removed