====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ kworker/u4:2/42 is trying to acquire lock: ffff88805e674d00 (team->team_lock_key#22){+.+.}-{3:3}, at: team_del_slave+0x32/0x1c0 drivers/net/team/team.c:2004 but task is already holding lock: ffff888063068768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5777 [inline] ffff888063068768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: ieee80211_remove_interfaces+0x29a/0x690 net/mac80211/iface.c:2344 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:603 [inline] __mutex_lock+0x136/0xcc0 kernel/locking/mutex.c:747 wiphy_lock include/net/cfg80211.h:5777 [inline] ieee80211_open+0x144/0x200 net/mac80211/iface.c:470 __dev_open+0x2cb/0x430 net/core/dev.c:1519 dev_open+0xab/0x190 net/core/dev.c:1555 team_port_add drivers/net/team/team.c:1225 [inline] team_add_slave+0x75f/0x29a0 drivers/net/team/team.c:1990 do_set_master net/core/rtnetlink.c:2709 [inline] do_setlink+0xdfe/0x4130 net/core/rtnetlink.c:2915 __rtnl_newlink net/core/rtnetlink.c:3706 [inline] rtnl_newlink+0x17da/0x20a0 net/core/rtnetlink.c:3753 rtnetlink_rcv_msg+0x869/0xfa0 net/core/rtnetlink.c:6475 netlink_rcv_skb+0x241/0x4d0 net/netlink/af_netlink.c:2545 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x751/0x8d0 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x8d0/0xbf0 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x5ba/0x960 net/socket.c:2594 ___sys_sendmsg+0x2a6/0x360 net/socket.c:2648 __sys_sendmsg net/socket.c:2677 [inline] __do_sys_sendmsg net/socket.c:2686 [inline] __se_sys_sendmsg+0x1c2/0x2b0 net/socket.c:2684 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (team->team_lock_key#22){+.+.}-{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+0x2df1/0x7d40 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x136/0xcc0 kernel/locking/mutex.c:747 team_del_slave+0x32/0x1c0 drivers/net/team/team.c:2004 team_device_event+0x28d/0xa20 drivers/net/team/team.c:3048 notifier_call_chain+0x197/0x380 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:2077 [inline] call_netdevice_notifiers net/core/dev.c:2091 [inline] unregister_netdevice_many_notify+0x100d/0x1900 net/core/dev.c:11124 unregister_netdevice_many net/core/dev.c:11180 [inline] unregister_netdevice_queue+0x32c/0x370 net/core/dev.c:11060 unregister_netdevice include/linux/netdevice.h:3137 [inline] _cfg80211_unregister_wdev+0x16b/0x580 net/wireless/core.c:1216 ieee80211_remove_interfaces+0x49e/0x690 net/mac80211/iface.c:2363 ieee80211_unregister_hw+0x5d/0x2a0 net/mac80211/main.c:1517 mac80211_hwsim_del_radio+0x289/0x480 drivers/net/wireless/virtual/mac80211_hwsim.c:5412 hwsim_exit_net+0x58d/0x650 drivers/net/wireless/virtual/mac80211_hwsim.c:6290 ops_exit_list net/core/net_namespace.c:173 [inline] cleanup_net+0x70a/0xbb0 net/core/net_namespace.c:652 process_one_work kernel/workqueue.c:2653 [inline] process_scheduled_works+0xa5d/0x15d0 kernel/workqueue.c:2730 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2811 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&rdev->wiphy.mtx); lock(team->team_lock_key#22); lock(&rdev->wiphy.mtx); lock(team->team_lock_key#22); *** DEADLOCK *** 5 locks held by kworker/u4:2/42: #0: ffff88801a254938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2628 [inline] #0: ffff88801a254938 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x96f/0x15d0 kernel/workqueue.c:2730 #1: ffffc90000b2fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2628 [inline] #1: ffffc90000b2fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x96f/0x15d0 kernel/workqueue.c:2730 #2: ffffffff8e3b5a90 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x14c/0xbb0 net/core/net_namespace.c:606 #3: ffffffff8e3c2ac8 (rtnl_mutex){+.+.}-{3:3}, at: ieee80211_unregister_hw+0x55/0x2a0 net/mac80211/main.c:1510 #4: ffff888063068768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5777 [inline] #4: ffff888063068768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: ieee80211_remove_interfaces+0x29a/0x690 net/mac80211/iface.c:2344 stack backtrace: CPU: 1 PID: 42 Comm: kworker/u4:2 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Workqueue: netns cleanup_net Call Trace: dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 check_noncircular+0x2fc/0x400 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+0x2df1/0x7d40 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x136/0xcc0 kernel/locking/mutex.c:747 team_del_slave+0x32/0x1c0 drivers/net/team/team.c:2004 team_device_event+0x28d/0xa20 drivers/net/team/team.c:3048 notifier_call_chain+0x197/0x380 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:2077 [inline] call_netdevice_notifiers net/core/dev.c:2091 [inline] unregister_netdevice_many_notify+0x100d/0x1900 net/core/dev.c:11124 unregister_netdevice_many net/core/dev.c:11180 [inline] unregister_netdevice_queue+0x32c/0x370 net/core/dev.c:11060 unregister_netdevice include/linux/netdevice.h:3137 [inline] _cfg80211_unregister_wdev+0x16b/0x580 net/wireless/core.c:1216 ieee80211_remove_interfaces+0x49e/0x690 net/mac80211/iface.c:2363 ieee80211_unregister_hw+0x5d/0x2a0 net/mac80211/main.c:1517 mac80211_hwsim_del_radio+0x289/0x480 drivers/net/wireless/virtual/mac80211_hwsim.c:5412 hwsim_exit_net+0x58d/0x650 drivers/net/wireless/virtual/mac80211_hwsim.c:6290 ops_exit_list net/core/net_namespace.c:173 [inline] cleanup_net+0x70a/0xbb0 net/core/net_namespace.c:652 process_one_work kernel/workqueue.c:2653 [inline] process_scheduled_works+0xa5d/0x15d0 kernel/workqueue.c:2730 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2811 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 team0: Port device wlan0 removed hsr_slave_0: left promiscuous mode hsr_slave_1: left promiscuous mode veth1_macvtap: left promiscuous mode veth0_macvtap: left promiscuous mode veth1_vlan: left promiscuous mode veth0_vlan: left promiscuous mode bond76 (unregistering): Released all slaves bond75 (unregistering): Released all slaves bond74 (unregistering): Released all slaves bond73 (unregistering): Released all slaves bond72 (unregistering): Released all slaves bond71 (unregistering): Released all slaves bond70 (unregistering): Released all slaves bond69 (unregistering): Released all slaves bond68 (unregistering): (slave veth99): Releasing backup interface bond68 (unregistering): Released all slaves bond67 (unregistering): (slave veth97): Releasing backup interface bond67 (unregistering): Released all slaves bond66 (unregistering): Released all slaves bond65 (unregistering): (slave veth95): Releasing backup interface bond65 (unregistering): Released all slaves bond64 (unregistering): Released all slaves bond63 (unregistering): Released all slaves bond62 (unregistering): Released all slaves bond61 (unregistering): Released all slaves bond60 (unregistering): Released all slaves bond59 (unregistering): Released all slaves bond58 (unregistering): Released all slaves bond57 (unregistering): Released all slaves bond56 (unregistering): Released all slaves bond55 (unregistering): Released all slaves bond54 (unregistering): Released all slaves bond53 (unregistering): Released all slaves bond52 (unregistering): Released all slaves bond51 (unregistering): Released all slaves bond50 (unregistering): Released all slaves bond49 (unregistering): Released all slaves bond48 (unregistering): Released all slaves bond47 (unregistering): (slave veth75): Releasing backup interface bond47 (unregistering): Released all slaves bond46 (unregistering): Released all slaves bond45 (unregistering): Released all slaves bond44 (unregistering): Released all slaves bond43 (unregistering): Released all slaves bond42 (unregistering): Released all slaves bond41 (unregistering): Released all slaves bond40 (unregistering): (slave veth71): Releasing backup interface bond40 (unregistering): Released all slaves bond39 (unregistering): Released all slaves bond38 (unregistering): Released all slaves bond37 (unregistering): (slave veth65): Releasing backup interface bond37 (unregistering): Released all slaves bond36 (unregistering): (slave veth63): Releasing backup interface bond36 (unregistering): Released all slaves bond35 (unregistering): (slave veth61): Releasing backup interface bond35 (unregistering): Released all slaves bond34 (unregistering): (slave veth59): Releasing backup interface bond34 (unregistering): Released all slaves bond33 (unregistering): (slave veth57): Releasing backup interface bond33 (unregistering): Released all slaves bond32 (unregistering): (slave veth55): Releasing backup interface bond32 (unregistering): Released all slaves bond31 (unregistering): (slave veth53): Releasing backup interface bond31 (unregistering): Released all slaves bond30 (unregistering): (slave veth51): Releasing backup interface bond30 (unregistering): Released all slaves bond29 (unregistering): (slave veth49): Releasing backup interface bond29 (unregistering): Released all slaves bond28 (unregistering): (slave veth47): Releasing backup interface bond28 (unregistering): Released all slaves bond27 (unregistering): (slave veth45): Releasing backup interface bond27 (unregistering): Released all slaves bond26 (unregistering): (slave veth43): Releasing backup interface bond26 (unregistering): Released all slaves bond25 (unregistering): (slave veth41): Releasing backup interface bond25 (unregistering): Released all slaves bond24 (unregistering): (slave veth39): Releasing backup interface bond24 (unregistering): Released all slaves bond23 (unregistering): (slave veth37): Releasing backup interface bond23 (unregistering): Released all slaves bond22 (unregistering): (slave veth35): Releasing backup interface bond22 (unregistering): Released all slaves bond21 (unregistering): Released all slaves bond20 (unregistering): Released all slaves bond19 (unregistering): (slave veth29): Releasing backup interface bond19 (unregistering): Released all slaves bond18 (unregistering): (slave veth27): Releasing backup interface bond18 (unregistering): Released all slaves bond17 (unregistering): (slave veth25): Releasing backup interface bond17 (unregistering): Released all slaves bond16 (unregistering): (slave veth23): Releasing backup interface bond16 (unregistering): Released all slaves bond15 (unregistering): (slave veth21): Releasing backup interface bond15 (unregistering): Released all slaves bond14 (unregistering): (slave veth19): Releasing backup interface bond14 (unregistering): Released all slaves bond13 (unregistering): (slave veth17): Releasing backup interface bond13 (unregistering): Released all slaves bond12 (unregistering): Released all slaves bond11 (unregistering): Released all slaves bond10 (unregistering): Released all slaves bond9 (unregistering): (slave veth11): Releasing backup interface bond9 (unregistering): Released all slaves bond8 (unregistering): (slave veth9): Releasing backup interface bond8 (unregistering): Released all slaves