no interfaces have a carrier [ 44.447119][ T3853] 8021q: adding VLAN 0 to HW filter on device bond0 [ 44.458151][ T3853] eql: remember to turn off Van-Jacobson compression on your slave devices Starting crond: OK Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.234' (ED25519) to the list of known hosts. 2026/04/11 12:05:52 parsed 1 programs syzkaller login: [ 72.576678][ T4187] cgroup: Unknown subsys name 'net' [ 72.690256][ T4187] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 74.278770][ T4187] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 76.865852][ T4221] chnl_net:caif_netlink_parms(): no params data found [ 76.935437][ T4221] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.943276][ T4221] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.951587][ T4221] device bridge_slave_0 entered promiscuous mode [ 76.963359][ T4221] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.970545][ T4221] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.980049][ T4221] device bridge_slave_1 entered promiscuous mode [ 77.008737][ T4221] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 77.020570][ T4221] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 77.052470][ T4221] team0: Port device team_slave_0 added [ 77.061280][ T4221] team0: Port device team_slave_1 added [ 77.085662][ T4221] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 77.094052][ T4221] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 77.121478][ T4221] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 77.135248][ T4221] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 77.142420][ T4221] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 77.169848][ T4221] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 77.213124][ T4221] device hsr_slave_0 entered promiscuous mode [ 77.220190][ T4221] device hsr_slave_1 entered promiscuous mode [ 77.370011][ T4221] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 77.383046][ T4221] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 77.395856][ T4221] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 77.406034][ T4221] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 77.443053][ T4221] bridge0: port 2(bridge_slave_1) entered blocking state [ 77.450335][ T4221] bridge0: port 2(bridge_slave_1) entered forwarding state [ 77.458502][ T4221] bridge0: port 1(bridge_slave_0) entered blocking state [ 77.465844][ T4221] bridge0: port 1(bridge_slave_0) entered forwarding state [ 77.537162][ T4221] 8021q: adding VLAN 0 to HW filter on device bond0 [ 77.554690][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 77.568421][ T3061] bridge0: port 1(bridge_slave_0) entered disabled state [ 77.578044][ T3061] bridge0: port 2(bridge_slave_1) entered disabled state [ 77.588237][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 77.605302][ T4221] 8021q: adding VLAN 0 to HW filter on device team0 [ 77.617791][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 77.626564][ T3061] bridge0: port 1(bridge_slave_0) entered blocking state [ 77.633796][ T3061] bridge0: port 1(bridge_slave_0) entered forwarding state [ 77.656601][ T409] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 77.666628][ T409] bridge0: port 2(bridge_slave_1) entered blocking state [ 77.673858][ T409] bridge0: port 2(bridge_slave_1) entered forwarding state [ 77.696602][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 77.705717][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 77.716104][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 77.734675][ T409] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 77.749153][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 77.761168][ T4221] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 77.889704][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 77.897295][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 77.911438][ T4221] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 77.954439][ T409] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 77.976868][ T409] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 77.997329][ T4221] device veth0_vlan entered promiscuous mode [ 78.008783][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 78.022569][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 78.032035][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 78.040517][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 78.057780][ T4221] device veth1_vlan entered promiscuous mode [ 78.087841][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 78.096417][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 78.105747][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 78.115627][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 78.128027][ T4221] device veth0_macvtap entered promiscuous mode [ 78.138017][ T4221] device veth1_macvtap entered promiscuous mode [ 78.156868][ T4221] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 78.164856][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 78.173222][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 78.181178][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 78.190741][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 78.204643][ T4221] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 78.221183][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 78.232009][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 78.244146][ T4221] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 78.253084][ T4221] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 78.261942][ T4221] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 78.271652][ T4221] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 78.379767][ T4221] syz-executor (4221) used greatest stack depth: 20848 bytes left [ 79.935906][ T409] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 79.952005][ T409] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 79.965188][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 80.003401][ T154] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 80.011286][ T154] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 80.025199][ T409] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 80.521743][ T9] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 2026/04/11 12:06:02 executed programs: 0 [ 80.811548][ T4282] chnl_net:caif_netlink_parms(): no params data found [ 80.857649][ T4282] bridge0: port 1(bridge_slave_0) entered blocking state [ 80.865408][ T4282] bridge0: port 1(bridge_slave_0) entered disabled state [ 80.873615][ T4282] device bridge_slave_0 entered promiscuous mode [ 80.882120][ T4282] bridge0: port 2(bridge_slave_1) entered blocking state [ 80.889802][ T4282] bridge0: port 2(bridge_slave_1) entered disabled state [ 80.897969][ T4282] device bridge_slave_1 entered promiscuous mode [ 80.919560][ T4282] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 80.930948][ T4282] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 80.958926][ T4282] team0: Port device team_slave_0 added [ 80.966600][ T4282] team0: Port device team_slave_1 added [ 80.984642][ T4282] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 80.991629][ T4282] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 81.017703][ T4282] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 81.029897][ T4282] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 81.036941][ T4282] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 81.062963][ T4282] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 81.094704][ T4282] device hsr_slave_0 entered promiscuous mode [ 81.101843][ T4282] device hsr_slave_1 entered promiscuous mode [ 81.108640][ T4282] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 81.116690][ T4282] Cannot create hsr debugfs directory [ 82.793605][ T23] Bluetooth: hci0: command 0x0409 tx timeout [ 83.400682][ T9] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 83.460129][ T9] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 83.501078][ T9] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 84.340357][ T4282] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 84.350510][ T4282] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 84.360790][ T4282] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 84.370137][ T4282] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 84.474707][ T4282] 8021q: adding VLAN 0 to HW filter on device bond0 [ 84.487441][ T409] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 84.498717][ T409] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 84.533426][ T4282] 8021q: adding VLAN 0 to HW filter on device team0 [ 84.545683][ T409] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 84.555236][ T409] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 84.564627][ T409] bridge0: port 1(bridge_slave_0) entered blocking state [ 84.571866][ T409] bridge0: port 1(bridge_slave_0) entered forwarding state [ 84.581853][ T409] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 84.590273][ T409] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 84.600039][ T409] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 84.609612][ T409] bridge0: port 2(bridge_slave_1) entered blocking state [ 84.616913][ T409] bridge0: port 2(bridge_slave_1) entered forwarding state [ 84.639594][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 84.653799][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 84.666475][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 84.676516][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 84.686271][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 84.697685][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 84.706963][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 84.740349][ T4282] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 84.751905][ T4282] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 84.764121][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 84.773287][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 84.781952][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 84.791793][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 84.801476][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 84.883069][ T13] Bluetooth: hci0: command 0x041b tx timeout [ 84.931440][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 84.939206][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 84.954239][ T4282] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 84.972540][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 84.981739][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 85.020554][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 85.029285][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 85.039114][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 85.047096][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 85.058988][ T4282] device veth0_vlan entered promiscuous mode [ 85.088689][ T4282] device veth1_vlan entered promiscuous mode [ 85.109436][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 85.118722][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 85.127577][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 85.136933][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 85.147755][ T4282] device veth0_macvtap entered promiscuous mode [ 85.158598][ T4282] device veth1_macvtap entered promiscuous mode [ 85.193947][ T4282] batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 [ 85.207096][ T4282] batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! [ 85.219937][ T4282] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 85.229107][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 85.237360][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 85.245453][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 85.254847][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 85.267630][ T4282] batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 [ 85.280729][ T4282] batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! [ 85.291822][ T4282] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 85.306626][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 85.315479][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 85.326677][ T4282] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 85.336829][ T4282] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 85.348212][ T4282] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 85.357184][ T4282] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 85.435317][ T144] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 85.446170][ T144] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 85.459594][ T9] device hsr_slave_0 left promiscuous mode [ 85.466432][ T9] device hsr_slave_1 left promiscuous mode [ 85.474609][ T9] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 85.482328][ T9] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 85.491064][ T9] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 85.499943][ T9] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 85.508255][ T9] device bridge_slave_1 left promiscuous mode [ 85.516958][ T9] bridge0: port 2(bridge_slave_1) entered disabled state [ 85.531307][ T9] device bridge_slave_0 left promiscuous mode [ 85.539021][ T9] bridge0: port 1(bridge_slave_0) entered disabled state [ 85.558370][ T9] device veth1_macvtap left promiscuous mode [ 85.564943][ T9] device veth0_macvtap left promiscuous mode [ 85.571020][ T9] device veth1_vlan left promiscuous mode [ 85.578672][ T9] device veth0_vlan left promiscuous mode [ 85.771151][ T9] team0 (unregistering): Port device team_slave_1 removed [ 85.785975][ T9] team0 (unregistering): Port device team_slave_0 removed [ 85.799705][ T9] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 85.816927][ T9] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 85.878476][ T9] bond0 (unregistering): Released all slaves [ 85.950768][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 85.979529][ T144] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 85.990461][ T144] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 2026/04/11 12:06:08 executed programs: 2 [ 86.001876][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 86.121313][ T4339] [ 86.123713][ T4339] ====================================================== [ 86.130818][ T4339] WARNING: possible circular locking dependency detected [ 86.137897][ T4339] syzkaller #0 Not tainted [ 86.142612][ T4339] ------------------------------------------------------ [ 86.149748][ T4339] syz.0.17/4339 is trying to acquire lock: [ 86.155580][ T4339] ffff888027c7cc28 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xfa/0x210 [ 86.166702][ T4339] [ 86.166702][ T4339] but task is already holding lock: [ 86.174103][ T4339] ffffffff8d6c51a8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x18b/0x560 [ 86.183808][ T4339] [ 86.183808][ T4339] which lock already depends on the new lock. [ 86.183808][ T4339] [ 86.194298][ T4339] [ 86.194298][ T4339] the existing dependency chain (in reverse order) is: [ 86.203445][ T4339] [ 86.203445][ T4339] -> #4 (rfkill_global_mutex){+.+.}-{3:3}: [ 86.211570][ T4339] __mutex_lock_common+0x1e3/0x2400 [ 86.217335][ T4339] mutex_lock_nested+0x17/0x20 [ 86.222675][ T4339] rfkill_register+0x33/0x8a0 [ 86.227921][ T4339] hci_register_dev+0x452/0x970 [ 86.233419][ T4339] vhci_create_device+0x32c/0x5c0 [ 86.239001][ T4339] vhci_write+0x391/0x450 [ 86.243888][ T4339] vfs_write+0x745/0xd60 [ 86.248695][ T4339] ksys_write+0x152/0x260 [ 86.253598][ T4339] do_syscall_64+0x4c/0xa0 [ 86.258656][ T4339] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 86.265118][ T4339] [ 86.265118][ T4339] -> #3 (&data->open_mutex){+.+.}-{3:3}: [ 86.273002][ T4339] __mutex_lock_common+0x1e3/0x2400 [ 86.278765][ T4339] mutex_lock_nested+0x17/0x20 [ 86.284096][ T4339] vhci_send_frame+0x88/0x100 [ 86.289340][ T4339] hci_send_frame+0x1a9/0x2e0 [ 86.294810][ T4339] hci_tx_work+0x9f9/0x1710 [ 86.300398][ T4339] process_one_work+0x85f/0x1010 [ 86.305907][ T4339] worker_thread+0xaa6/0x1290 [ 86.311146][ T4339] kthread+0x436/0x520 [ 86.315778][ T4339] ret_from_fork+0x1f/0x30 [ 86.320757][ T4339] [ 86.320757][ T4339] -> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}: [ 86.330093][ T4339] __flush_work+0x116/0x210 [ 86.335174][ T4339] hci_dev_do_close+0x1e7/0x1030 [ 86.340675][ T4339] hci_unregister_dev+0x2d7/0x580 [ 86.346416][ T4339] vhci_release+0x73/0xc0 [ 86.351317][ T4339] __fput+0x234/0x930 [ 86.355870][ T4339] task_work_run+0x125/0x1a0 [ 86.361022][ T4339] do_exit+0x626/0x20c0 [ 86.365851][ T4339] do_group_exit+0x12e/0x300 [ 86.371005][ T4339] get_signal+0x6ca/0x12c0 [ 86.375983][ T4339] arch_do_signal_or_restart+0xe7/0x12c0 [ 86.382184][ T4339] exit_to_user_mode_loop+0x9e/0x130 [ 86.388184][ T4339] exit_to_user_mode_prepare+0xee/0x180 [ 86.394291][ T4339] syscall_exit_to_user_mode+0x16/0x40 [ 86.400319][ T4339] do_syscall_64+0x58/0xa0 [ 86.405415][ T4339] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 86.412310][ T4339] [ 86.412310][ T4339] -> #1 (&hdev->req_lock){+.+.}-{3:3}: [ 86.420002][ T4339] __mutex_lock_common+0x1e3/0x2400 [ 86.425776][ T4339] mutex_lock_nested+0x17/0x20 [ 86.431117][ T4339] bg_scan_update+0x44/0x3b0 [ 86.436268][ T4339] process_one_work+0x85f/0x1010 [ 86.441768][ T4339] worker_thread+0xaa6/0x1290 [ 86.447044][ T4339] kthread+0x436/0x520 [ 86.451712][ T4339] ret_from_fork+0x1f/0x30 [ 86.456692][ T4339] [ 86.456692][ T4339] -> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}: [ 86.466658][ T4339] __lock_acquire+0x2c42/0x7d10 [ 86.472092][ T4339] lock_acquire+0x19e/0x400 [ 86.477164][ T4339] __flush_work+0x116/0x210 [ 86.482239][ T4339] __cancel_work_timer+0x3f4/0x560 [ 86.487949][ T4339] hci_request_cancel_all+0xcc/0x300 [ 86.493828][ T4339] hci_dev_do_close+0x4e/0x1030 [ 86.499246][ T4339] hci_rfkill_set_block+0x10a/0x190 [ 86.505101][ T4339] rfkill_set_block+0x1c6/0x420 [ 86.510517][ T4339] rfkill_fop_write+0x452/0x560 [ 86.515975][ T4339] vfs_write+0x30b/0xd60 [ 86.520772][ T4339] ksys_write+0x152/0x260 [ 86.525657][ T4339] do_syscall_64+0x4c/0xa0 [ 86.530636][ T4339] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 86.537103][ T4339] [ 86.537103][ T4339] other info that might help us debug this: [ 86.537103][ T4339] [ 86.547362][ T4339] Chain exists of: [ 86.547362][ T4339] (work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex [ 86.547362][ T4339] [ 86.563160][ T4339] Possible unsafe locking scenario: [ 86.563160][ T4339] [ 86.570635][ T4339] CPU0 CPU1 [ 86.576038][ T4339] ---- ---- [ 86.581438][ T4339] lock(rfkill_global_mutex); [ 86.586269][ T4339] lock(&data->open_mutex); [ 86.593415][ T4339] lock(rfkill_global_mutex); [ 86.600840][ T4339] lock((work_completion)(&hdev->bg_scan_update)); [ 86.607469][ T4339] [ 86.607469][ T4339] *** DEADLOCK *** [ 86.607469][ T4339] [ 86.615644][ T4339] 1 lock held by syz.0.17/4339: [ 86.620523][ T4339] #0: ffffffff8d6c51a8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x18b/0x560 [ 86.630765][ T4339] [ 86.630765][ T4339] stack backtrace: [ 86.636799][ T4339] CPU: 0 PID: 4339 Comm: syz.0.17 Not tainted syzkaller #0 [ 86.644137][ T4339] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 86.654248][ T4339] Call Trace: [ 86.657570][ T4339] [ 86.660531][ T4339] dump_stack_lvl+0x188/0x250 [ 86.665247][ T4339] ? load_image+0x400/0x400 [ 86.669789][ T4339] ? show_regs_print_info+0x20/0x20 [ 86.675046][ T4339] ? print_circular_bug+0x12b/0x1a0 [ 86.680291][ T4339] check_noncircular+0x296/0x330 [ 86.685267][ T4339] ? look_up_lock_class+0x71/0x110 [ 86.690429][ T4339] ? add_chain_block+0x940/0x940 [ 86.695411][ T4339] ? lockdep_lock+0xf1/0x1f0 [ 86.700042][ T4339] ? __lock_acquire+0x12e8/0x7d10 [ 86.705109][ T4339] ? mark_lock+0x94/0x320 [ 86.709488][ T4339] __lock_acquire+0x2c42/0x7d10 [ 86.714536][ T4339] ? verify_lock_unused+0x140/0x140 [ 86.719776][ T4339] ? verify_lock_unused+0x140/0x140 [ 86.725019][ T4339] ? mark_lock+0x94/0x320 [ 86.729398][ T4339] lock_acquire+0x19e/0x400 [ 86.733945][ T4339] ? __flush_work+0xfa/0x210 [ 86.738578][ T4339] ? __lock_acquire+0x7d10/0x7d10 [ 86.743648][ T4339] ? read_lock_is_recursive+0x10/0x10 [ 86.749068][ T4339] ? start_flush_work+0x776/0x820 [ 86.754141][ T4339] __flush_work+0x116/0x210 [ 86.758685][ T4339] ? __flush_work+0xfa/0x210 [ 86.763320][ T4339] ? flush_work+0x20/0x20 [ 86.767683][ T4339] ? try_to_grab_pending+0xfa/0x7f0 [ 86.772927][ T4339] ? mark_lock+0x94/0x320 [ 86.777289][ T4339] ? lockdep_hardirqs_on_prepare+0x409/0x770 [ 86.783318][ T4339] ? lock_chain_count+0x20/0x20 [ 86.788212][ T4339] ? mark_lock+0x94/0x320 [ 86.792578][ T4339] ? __cancel_work_timer+0x36a/0x560 [ 86.794721][ T1108] cfg80211: failed to load regulatory.db [ 86.797919][ T4339] __cancel_work_timer+0x3f4/0x560 [ 86.808782][ T4339] ? cancel_work_sync+0x20/0x20 [ 86.813680][ T4339] ? __cancel_work+0x1f9/0x2e0 [ 86.818530][ T4339] ? lockdep_hardirqs_on+0x94/0x140 [ 86.823777][ T4339] ? __cancel_work+0x27b/0x2e0 [ 86.828591][ T4339] ? cancel_work+0x20/0x20 [ 86.833042][ T4339] ? lock_chain_count+0x20/0x20 [ 86.837935][ T4339] hci_request_cancel_all+0xcc/0x300 [ 86.843367][ T4339] hci_dev_do_close+0x4e/0x1030 [ 86.848281][ T4339] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 86.854257][ T4339] ? _raw_spin_unlock+0x40/0x40 [ 86.859146][ T4339] hci_rfkill_set_block+0x10a/0x190 [ 86.864535][ T4339] ? rcu_lock_release+0x20/0x20 [ 86.869462][ T4339] rfkill_set_block+0x1c6/0x420 [ 86.874355][ T4339] rfkill_fop_write+0x452/0x560 [ 86.879248][ T4339] ? rfkill_fop_read+0x4d0/0x4d0 [ 86.884229][ T4339] ? common_file_perm+0x110/0x1c0 [ 86.889381][ T4339] ? fsnotify_perm+0x5d/0x560 [ 86.894097][ T4339] ? security_file_permission+0x75/0xa0 [ 86.899775][ T4339] ? rfkill_fop_read+0x4d0/0x4d0 [ 86.904759][ T4339] vfs_write+0x30b/0xd60 [ 86.909047][ T4339] ? file_end_write+0x250/0x250 [ 86.913941][ T4339] ? __context_tracking_exit+0x4c/0x80 [ 86.919447][ T4339] ? __lock_acquire+0x7d10/0x7d10 [ 86.924524][ T4339] ? __fdget_pos+0x1e2/0x370 [ 86.929183][ T4339] ksys_write+0x152/0x260 [ 86.933554][ T4339] ? __ia32_sys_read+0x80/0x80 [ 86.938358][ T4339] ? lockdep_hardirqs_on+0x94/0x140 [ 86.943602][ T4339] do_syscall_64+0x4c/0xa0 [ 86.948052][ T4339] ? clear_bhb_loop+0x30/0x80 [ 86.952768][ T4339] ? clear_bhb_loop+0x30/0x80 [ 86.957486][ T4339] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 86.963436][ T4339] RIP: 0033:0x7fc9244db819 [ 86.967882][ T4339] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 [ 86.987531][ T4339] RSP: 002b:00007ffea7870698 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 86.995989][ T4339] RAX: ffffffffffffffda RBX: 00007fc924754fa0 RCX: 00007fc9244db819 [ 87.004001][ T4339] RDX: 0000000000000008 RSI: 0000200000000180 RDI: 0000000000000003 [ 87.012014][ T4339] RBP: 00007fc924571c91 R08: 0000000000000000 R09: 0000000000000000 [ 87.020024][ T4339] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 87.028030][ T4339] R13: 00007fc924754fac R14: 00007fc924754fa0 R15: 00007fc924754fa0 [ 87.036053][ T4339] [ 87.062863][ T7] Bluetooth: hci0: command 0x040f tx timeout 2026/04/11 12:06:13 executed programs: 202 2026/04/11 12:06:18 executed programs: 498