====================================================== WARNING: possible circular locking dependency detected 5.15.179-syzkaller #0 Not tainted ------------------------------------------------------ syz.8.1318/8997 is trying to acquire lock: ffff88807dc50d00 (team->team_lock_key#15){+.+.}-{3:3}, at: team_del_slave+0x2e/0x1f0 drivers/net/team/team.c:2004 but task is already holding lock: ffff8880249e8628 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: nl80211_del_interface+0x127/0x370 net/wireless/nl80211.c:4116 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&rdev->wiphy.mtx){+.+.}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 wiphy_lock include/net/cfg80211.h:5314 [inline] ieee80211_open+0x13a/0x1f0 net/mac80211/iface.c:361 __dev_open+0x2c3/0x430 net/core/dev.c:1537 dev_open+0xaa/0x1a0 net/core/dev.c:1573 team_port_add drivers/net/team/team.c:1220 [inline] team_add_slave+0x9b9/0x2810 drivers/net/team/team.c:1990 do_set_master net/core/rtnetlink.c:2572 [inline] do_setlink+0xddd/0x3d80 net/core/rtnetlink.c:2783 __rtnl_newlink net/core/rtnetlink.c:3447 [inline] rtnl_newlink+0x17bf/0x2050 net/core/rtnetlink.c:3569 rtnetlink_rcv_msg+0x99d/0xef0 net/core/rtnetlink.c:5647 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2489 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline] netlink_unicast+0x7c0/0x990 net/netlink/af_netlink.c:1337 netlink_sendmsg+0xa30/0xd60 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2436 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2490 __sys_sendmsg net/socket.c:2519 [inline] __do_sys_sendmsg net/socket.c:2528 [inline] __se_sys_sendmsg+0x19a/0x260 net/socket.c:2526 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (team->team_lock_key#15){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 team_del_slave+0x2e/0x1f0 drivers/net/team/team.c:2004 team_device_event+0x264/0x580 drivers/net/team/team.c:3048 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391 call_netdevice_notifiers_extack net/core/dev.c:2061 [inline] call_netdevice_notifiers net/core/dev.c:2075 [inline] unregister_netdevice_many+0xe98/0x1840 net/core/dev.c:11133 unregister_netdevice_queue+0x2e6/0x350 net/core/dev.c:11066 unregister_netdevice include/linux/netdevice.h:3020 [inline] _cfg80211_unregister_wdev+0x181/0x510 net/wireless/core.c:1129 ieee80211_if_remove+0x1cc/0x2c0 net/mac80211/iface.c:2105 ieee80211_del_iface+0x15/0x20 net/mac80211/cfg.c:145 rdev_del_virtual_intf net/wireless/rdev-ops.h:57 [inline] nl80211_del_interface+0x1f5/0x370 net/wireless/nl80211.c:4118 genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline] genl_family_rcv_msg net/netlink/genetlink.c:775 [inline] genl_rcv_msg+0xfc2/0x14a0 net/netlink/genetlink.c:792 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2489 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline] netlink_unicast+0x7c0/0x990 net/netlink/af_netlink.c:1337 netlink_sendmsg+0xa30/0xd60 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2436 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2490 __sys_sendmsg net/socket.c:2519 [inline] __do_sys_sendmsg net/socket.c:2528 [inline] __se_sys_sendmsg+0x19a/0x260 net/socket.c:2526 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&rdev->wiphy.mtx); lock(team->team_lock_key#15); lock(&rdev->wiphy.mtx); lock(team->team_lock_key#15); *** DEADLOCK *** 3 locks held by syz.8.1318/8997: #0: ffffffff8dca15f0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:802 #1: ffffffff8dc43ac8 (rtnl_mutex){+.+.}-{3:3}, at: nl80211_pre_doit+0x28/0x550 net/wireless/nl80211.c:14969 #2: ffff8880249e8628 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: nl80211_del_interface+0x127/0x370 net/wireless/nl80211.c:4116 stack backtrace: CPU: 1 PID: 8997 Comm: syz.8.1318 Not tainted 5.15.179-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 team_del_slave+0x2e/0x1f0 drivers/net/team/team.c:2004 team_device_event+0x264/0x580 drivers/net/team/team.c:3048 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391 call_netdevice_notifiers_extack net/core/dev.c:2061 [inline] call_netdevice_notifiers net/core/dev.c:2075 [inline] unregister_netdevice_many+0xe98/0x1840 net/core/dev.c:11133 unregister_netdevice_queue+0x2e6/0x350 net/core/dev.c:11066 unregister_netdevice include/linux/netdevice.h:3020 [inline] _cfg80211_unregister_wdev+0x181/0x510 net/wireless/core.c:1129 ieee80211_if_remove+0x1cc/0x2c0 net/mac80211/iface.c:2105 ieee80211_del_iface+0x15/0x20 net/mac80211/cfg.c:145 rdev_del_virtual_intf net/wireless/rdev-ops.h:57 [inline] nl80211_del_interface+0x1f5/0x370 net/wireless/nl80211.c:4118 genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline] genl_family_rcv_msg net/netlink/genetlink.c:775 [inline] genl_rcv_msg+0xfc2/0x14a0 net/netlink/genetlink.c:792 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2489 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline] netlink_unicast+0x7c0/0x990 net/netlink/af_netlink.c:1337 netlink_sendmsg+0xa30/0xd60 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2436 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2490 __sys_sendmsg net/socket.c:2519 [inline] __do_sys_sendmsg net/socket.c:2528 [inline] __se_sys_sendmsg+0x19a/0x260 net/socket.c:2526 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fc153f16169 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:00007fc151d7f038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fc15412efa0 RCX: 00007fc153f16169 RDX: 0000000000000000 RSI: 0000400000000200 RDI: 0000000000000003 RBP: 00007fc153f972a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc15412efa0 R15: 00007ffc2195bb38 team0: Port device wlan1 removed