====================================================== WARNING: possible circular locking dependency detected 6.3.0-syzkaller-11733-g825a0714d2b3 #0 Not tainted ------------------------------------------------------ syz-executor.4/9067 is trying to acquire lock: ffff88807db16cf8 (team->team_lock_key#6){+.+.}-{3:3}, at: team_del_slave+0x31/0x1c0 drivers/net/team/team.c:1998 but task is already holding lock: ffff8880467a0728 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: nl80211_del_interface+0xfb/0x190 net/wireless/nl80211.c:4376 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+0x12f/0x1350 kernel/locking/mutex.c:747 wiphy_lock include/net/cfg80211.h:5737 [inline] ieee80211_open net/mac80211/iface.c:437 [inline] ieee80211_open+0x193/0x250 net/mac80211/iface.c:424 __dev_open+0x297/0x4d0 net/core/dev.c:1415 dev_open net/core/dev.c:1451 [inline] dev_open+0xec/0x150 net/core/dev.c:1444 team_port_add drivers/net/team/team.c:1215 [inline] team_add_slave+0xa92/0x2130 drivers/net/team/team.c:1984 do_set_master+0x1c8/0x220 net/core/rtnetlink.c:2626 do_setlink+0x89e/0x3d30 net/core/rtnetlink.c:2829 __rtnl_newlink+0xd69/0x1840 net/core/rtnetlink.c:3626 rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3673 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6395 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2546 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1913 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 ____sys_sendmsg+0x71c/0x900 net/socket.c:2503 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2557 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2586 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 -> #0 (team->team_lock_key#6){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3108 [inline] check_prevs_add kernel/locking/lockdep.c:3227 [inline] validate_chain kernel/locking/lockdep.c:3842 [inline] __lock_acquire+0x2f21/0x5df0 kernel/locking/lockdep.c:5074 lock_acquire kernel/locking/lockdep.c:5691 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5656 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12f/0x1350 kernel/locking/mutex.c:747 team_del_slave+0x31/0x1c0 drivers/net/team/team.c:1998 team_device_event+0xd7/0xad0 drivers/net/team/team.c:3022 notifier_call_chain+0xb6/0x3c0 kernel/notifier.c:93 call_netdevice_notifiers_info+0xb9/0x130 net/core/dev.c:1935 call_netdevice_notifiers_extack net/core/dev.c:1973 [inline] call_netdevice_notifiers net/core/dev.c:1987 [inline] unregister_netdevice_many_notify+0x75f/0x18c0 net/core/dev.c:10882 unregister_netdevice_many net/core/dev.c:10938 [inline] unregister_netdevice_queue+0x2e5/0x3c0 net/core/dev.c:10818 unregister_netdevice include/linux/netdevice.h:3109 [inline] _cfg80211_unregister_wdev+0x64a/0x830 net/wireless/core.c:1157 ieee80211_if_remove+0x1e3/0x390 net/mac80211/iface.c:2239 ieee80211_del_iface+0x16/0x20 net/mac80211/cfg.c:202 rdev_del_virtual_intf net/wireless/rdev-ops.h:62 [inline] cfg80211_remove_virtual_intf+0xd3/0x400 net/wireless/util.c:2574 nl80211_del_interface+0x106/0x190 net/wireless/nl80211.c:4378 genl_family_rcv_msg_doit.isra.0+0x1e6/0x2d0 net/netlink/genetlink.c:968 genl_family_rcv_msg net/netlink/genetlink.c:1048 [inline] genl_rcv_msg+0x4ff/0x7e0 net/netlink/genetlink.c:1065 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2546 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1076 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1913 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 ____sys_sendmsg+0x71c/0x900 net/socket.c:2503 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2557 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2586 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&rdev->wiphy.mtx); lock(team->team_lock_key#6); lock(&rdev->wiphy.mtx); lock(team->team_lock_key#6); *** DEADLOCK *** 3 locks held by syz-executor.4/9067: #0: ffffffff8e1aa6b0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1075 #1: ffffffff8e1171e8 (rtnl_mutex){+.+.}-{3:3}, at: nl80211_pre_doit+0xb4/0xab0 net/wireless/nl80211.c:16380 #2: ffff8880467a0728 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: nl80211_del_interface+0xfb/0x190 net/wireless/nl80211.c:4376 stack backtrace: CPU: 0 PID: 9067 Comm: syz-executor.4 Not tainted 6.3.0-syzkaller-11733-g825a0714d2b3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2188 check_prev_add kernel/locking/lockdep.c:3108 [inline] check_prevs_add kernel/locking/lockdep.c:3227 [inline] validate_chain kernel/locking/lockdep.c:3842 [inline] __lock_acquire+0x2f21/0x5df0 kernel/locking/lockdep.c:5074 lock_acquire kernel/locking/lockdep.c:5691 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5656 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12f/0x1350 kernel/locking/mutex.c:747 team_del_slave+0x31/0x1c0 drivers/net/team/team.c:1998 team_device_event+0xd7/0xad0 drivers/net/team/team.c:3022 notifier_call_chain+0xb6/0x3c0 kernel/notifier.c:93 call_netdevice_notifiers_info+0xb9/0x130 net/core/dev.c:1935 call_netdevice_notifiers_extack net/core/dev.c:1973 [inline] call_netdevice_notifiers net/core/dev.c:1987 [inline] unregister_netdevice_many_notify+0x75f/0x18c0 net/core/dev.c:10882 unregister_netdevice_many net/core/dev.c:10938 [inline] unregister_netdevice_queue+0x2e5/0x3c0 net/core/dev.c:10818 unregister_netdevice include/linux/netdevice.h:3109 [inline] _cfg80211_unregister_wdev+0x64a/0x830 net/wireless/core.c:1157 ieee80211_if_remove+0x1e3/0x390 net/mac80211/iface.c:2239 ieee80211_del_iface+0x16/0x20 net/mac80211/cfg.c:202 rdev_del_virtual_intf net/wireless/rdev-ops.h:62 [inline] cfg80211_remove_virtual_intf+0xd3/0x400 net/wireless/util.c:2574 nl80211_del_interface+0x106/0x190 net/wireless/nl80211.c:4378 genl_family_rcv_msg_doit.isra.0+0x1e6/0x2d0 net/netlink/genetlink.c:968 genl_family_rcv_msg net/netlink/genetlink.c:1048 [inline] genl_rcv_msg+0x4ff/0x7e0 net/netlink/genetlink.c:1065 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2546 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1076 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1913 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 ____sys_sendmsg+0x71c/0x900 net/socket.c:2503 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2557 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2586 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7fd2579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7fcd5cc EFLAGS: 00000296 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000020000240 RDX: 0000000000048044 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 team0: Port device wlan0 removed ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 retq 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi