====================================================== WARNING: possible circular locking dependency detected 6.12.0-rc4-syzkaller-00289-gea1fda89f5b2 #0 Not tainted ------------------------------------------------------ kworker/u32:7/1134 is trying to acquire lock: but task is already holding lock: ffff888035e70768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:6014 [inline] ffff888035e70768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: ieee80211_remove_interfaces+0xfe/0x760 net/mac80211/iface.c:2275 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+0x175/0x9c0 kernel/locking/mutex.c:752 wiphy_lock include/net/cfg80211.h:6014 [inline] ieee80211_open+0x12f/0x260 net/mac80211/iface.c:449 __dev_open+0x2d4/0x4e0 net/core/dev.c:1476 dev_open net/core/dev.c:1512 [inline] dev_open+0xf4/0x160 net/core/dev.c:1505 team_port_add drivers/net/team/team_core.c:1216 [inline] team_add_slave+0xacd/0x20e0 drivers/net/team/team_core.c:1976 do_set_master+0x1bc/0x230 net/core/rtnetlink.c:2730 do_setlink+0xd24/0x41c0 net/core/rtnetlink.c:2936 __rtnl_newlink+0xc35/0x1920 net/core/rtnetlink.c:3725 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3772 rtnetlink_rcv_msg+0x3c7/0xea0 net/core/rtnetlink.c:6675 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2551 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg net/socket.c:744 [inline] ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2607 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2661 __sys_sendmsg+0x117/0x1f0 net/socket.c:2690 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (team->team_lock_key#7){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x250b/0x3ce0 kernel/locking/lockdep.c:5202 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5825 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x175/0x9c0 kernel/locking/mutex.c:752 team_del_slave+0x31/0x1b0 drivers/net/team/team_core.c:1990 team_device_event+0xd0/0x770 drivers/net/team/team_core.c:2984 notifier_call_chain+0xb9/0x410 kernel/notifier.c:93 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996 call_netdevice_notifiers_extack net/core/dev.c:2034 [inline] call_netdevice_notifiers net/core/dev.c:2048 [inline] unregister_netdevice_many_notify+0x8d5/0x1e50 net/core/dev.c:11403 unregister_netdevice_many net/core/dev.c:11465 [inline] unregister_netdevice_queue+0x307/0x3f0 net/core/dev.c:11339 unregister_netdevice include/linux/netdevice.h:3118 [inline] _cfg80211_unregister_wdev+0x624/0x7f0 net/wireless/core.c:1211 ieee80211_remove_interfaces+0x36d/0x760 net/mac80211/iface.c:2300 ieee80211_unregister_hw+0x55/0x3a0 net/mac80211/main.c:1669 mac80211_hwsim_del_radio drivers/net/wireless/virtual/mac80211_hwsim.c:5625 [inline] hwsim_exit_net+0x3ad/0x7d0 drivers/net/wireless/virtual/mac80211_hwsim.c:6505 ops_exit_list+0xb0/0x180 net/core/net_namespace.c:173 cleanup_net+0x5b7/0xb40 net/core/net_namespace.c:626 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&rdev->wiphy.mtx); lock(team->team_lock_key#7); lock(&rdev->wiphy.mtx); lock(team->team_lock_key#7); *** DEADLOCK *** 5 locks held by kworker/u32:7/1134: #0: ffff88801befc948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204 #1: ffffc90005b87d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 #2: ffffffff8fecd0d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xb40 net/core/net_namespace.c:580 #3: ffffffff8fee2a68 (rtnl_mutex){+.+.}-{3:3}, at: ieee80211_unregister_hw+0x4d/0x3a0 net/mac80211/main.c:1662 #4: ffff888035e70768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:6014 [inline] #4: ffff888035e70768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: ieee80211_remove_interfaces+0xfe/0x760 net/mac80211/iface.c:2275 stack backtrace: CPU: 0 UID: 0 PID: 1134 Comm: kworker/u32:7 Not tainted 6.12.0-rc4-syzkaller-00289-gea1fda89f5b2 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x41c/0x610 kernel/locking/lockdep.c:2074 check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x250b/0x3ce0 kernel/locking/lockdep.c:5202 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5825 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x175/0x9c0 kernel/locking/mutex.c:752 team_del_slave+0x31/0x1b0 drivers/net/team/team_core.c:1990 team_device_event+0xd0/0x770 drivers/net/team/team_core.c:2984 notifier_call_chain+0xb9/0x410 kernel/notifier.c:93 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996 call_netdevice_notifiers_extack net/core/dev.c:2034 [inline] call_netdevice_notifiers net/core/dev.c:2048 [inline] unregister_netdevice_many_notify+0x8d5/0x1e50 net/core/dev.c:11403 unregister_netdevice_many net/core/dev.c:11465 [inline] unregister_netdevice_queue+0x307/0x3f0 net/core/dev.c:11339 unregister_netdevice include/linux/netdevice.h:3118 [inline] _cfg80211_unregister_wdev+0x624/0x7f0 net/wireless/core.c:1211 ieee80211_remove_interfaces+0x36d/0x760 net/mac80211/iface.c:2300 ieee80211_unregister_hw+0x55/0x3a0 net/mac80211/main.c:1669 mac80211_hwsim_del_radio drivers/net/wireless/virtual/mac80211_hwsim.c:5625 [inline] hwsim_exit_net+0x3ad/0x7d0 drivers/net/wireless/virtual/mac80211_hwsim.c:6505 ops_exit_list+0xb0/0x180 net/core/net_namespace.c:173 cleanup_net+0x5b7/0xb40 net/core/net_namespace.c:626 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389