no interfaces have a carrier [ 46.751604][ T3849] 8021q: adding VLAN 0 to HW filter on device bond0 [ 46.766611][ T3849] eql: remember to turn off Van-Jacobson compression on your slave devices Starting crond: OK Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.40' (ED25519) to the list of known hosts. 2026/10/02 13:54:20 parsed 1 programs 2026/10/02 13:54:20 serving rpc on tcp://34219 syzkaller login: [ 72.146964][ T4195] cgroup: Unknown subsys name 'net' [ 72.319785][ T4195] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 73.965005][ T4195] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 75.774252][ T4214] chnl_net:caif_netlink_parms(): no params data found [ 75.820253][ T4214] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.829590][ T4214] bridge0: port 1(bridge_slave_0) entered disabled state [ 75.838592][ T4214] device bridge_slave_0 entered promiscuous mode [ 75.848668][ T4214] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.860488][ T4214] bridge0: port 2(bridge_slave_1) entered disabled state [ 75.869387][ T4214] device bridge_slave_1 entered promiscuous mode [ 75.894708][ T4214] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 75.907543][ T4214] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 75.935476][ T4214] team0: Port device team_slave_0 added [ 75.944270][ T4214] team0: Port device team_slave_1 added [ 75.960701][ T4214] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 75.968133][ T4214] 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. [ 76.004244][ T4214] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 76.026045][ T4214] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 76.040981][ T4214] 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. [ 76.086881][ T4214] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 76.127396][ T4214] device hsr_slave_0 entered promiscuous mode [ 76.135994][ T4214] device hsr_slave_1 entered promiscuous mode [ 76.254069][ T4214] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 76.274494][ T4214] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 76.288920][ T4214] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 76.306801][ T4214] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 76.347728][ T4214] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.357251][ T4214] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.369765][ T4214] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.378609][ T4214] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.448235][ T4214] 8021q: adding VLAN 0 to HW filter on device bond0 [ 76.469662][ T1274] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 76.481659][ T1274] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.493028][ T1274] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.501420][ T1274] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 76.518344][ T4214] 8021q: adding VLAN 0 to HW filter on device team0 [ 76.531139][ T1274] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 76.550374][ T1274] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.558404][ T1274] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.584081][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 76.595553][ T144] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.605190][ T144] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.628432][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 76.639505][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 76.666965][ T1274] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 76.678738][ T1274] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 76.689995][ T1274] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 76.704125][ T4214] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 76.870120][ T1274] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 76.878554][ T1274] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 76.894789][ T4214] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 76.929010][ T1274] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 76.939574][ T1274] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 76.965353][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 76.977929][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 76.991252][ T4214] device veth0_vlan entered promiscuous mode [ 77.001029][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 77.010442][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 77.030084][ T4214] device veth1_vlan entered promiscuous mode [ 77.057049][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 77.069977][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 77.080453][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 77.092005][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 77.105577][ T4214] device veth0_macvtap entered promiscuous mode [ 77.118085][ T4214] device veth1_macvtap entered promiscuous mode [ 77.141223][ T4214] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 77.154997][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 77.167241][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 77.179021][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 77.191321][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 77.208408][ T4214] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 77.216788][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 77.230562][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 77.246914][ T4214] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.261038][ T4214] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.273581][ T4214] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.284566][ T4214] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.837266][ T154] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 77.953277][ T144] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.967343][ T144] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.982788][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 78.007166][ T4224] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 78.015509][ T4224] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 78.026189][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 79.965442][ T154] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 82.299184][ T154] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 82.361266][ T154] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 83.418696][ T154] device hsr_slave_0 left promiscuous mode [ 83.440170][ T154] device hsr_slave_1 left promiscuous mode [ 83.463335][ T154] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 83.482711][ T154] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 83.505879][ T154] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 83.525238][ T154] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 83.543873][ T154] device bridge_slave_1 left promiscuous mode [ 83.554211][ T154] bridge0: port 2(bridge_slave_1) entered disabled state [ 83.571184][ T154] device bridge_slave_0 left promiscuous mode [ 83.579230][ T154] bridge0: port 1(bridge_slave_0) entered disabled state [ 83.607968][ T154] device veth1_macvtap left promiscuous mode [ 83.615884][ T154] device veth0_macvtap left promiscuous mode 2026/10/02 13:54:33 executed programs: 0 [ 83.626158][ T154] device veth1_vlan left promiscuous mode [ 83.634778][ T154] device veth0_vlan left promiscuous mode [ 83.817835][ T154] team0 (unregistering): Port device team_slave_1 removed [ 83.832138][ T154] team0 (unregistering): Port device team_slave_0 removed [ 83.845594][ T154] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 83.859526][ T154] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 83.914465][ T154] bond0 (unregistering): Released all slaves [ 84.165735][ T4323] chnl_net:caif_netlink_parms(): no params data found [ 84.254904][ T4323] bridge0: port 1(bridge_slave_0) entered blocking state [ 84.265163][ T4323] bridge0: port 1(bridge_slave_0) entered disabled state [ 84.275665][ T4323] device bridge_slave_0 entered promiscuous mode [ 84.285827][ T4323] bridge0: port 2(bridge_slave_1) entered blocking state [ 84.293381][ T4323] bridge0: port 2(bridge_slave_1) entered disabled state [ 84.301907][ T4323] device bridge_slave_1 entered promiscuous mode [ 84.326810][ T4323] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 84.338951][ T4323] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 84.390218][ T4323] team0: Port device team_slave_0 added [ 84.405626][ T4323] team0: Port device team_slave_1 added [ 84.433826][ T4323] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 84.441025][ T4323] 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. [ 84.469046][ T4323] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 84.482329][ T4323] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 84.490049][ T4323] 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. [ 84.519249][ T4323] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 84.563414][ T4323] device hsr_slave_0 entered promiscuous mode [ 84.570427][ T4323] device hsr_slave_1 entered promiscuous mode [ 85.188624][ T4323] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 85.212142][ T4323] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 85.222748][ T4323] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 85.236277][ T4323] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 85.341181][ T4323] 8021q: adding VLAN 0 to HW filter on device bond0 [ 85.370289][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 85.382130][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 85.394665][ T4323] 8021q: adding VLAN 0 to HW filter on device team0 [ 85.413720][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 85.424188][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 85.435781][ T4224] bridge0: port 1(bridge_slave_0) entered blocking state [ 85.443921][ T4224] bridge0: port 1(bridge_slave_0) entered forwarding state [ 85.463754][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 85.476095][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 85.486545][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 85.499507][ T4224] bridge0: port 2(bridge_slave_1) entered blocking state [ 85.507725][ T4224] bridge0: port 2(bridge_slave_1) entered forwarding state [ 85.524756][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 85.544116][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 85.555093][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 85.566207][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 85.587604][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 85.600655][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 85.619030][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 85.629297][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 85.640705][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 85.656677][ T4323] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 85.669962][ T4323] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 85.679321][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 85.692168][ T4224] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 85.783960][ T23] Bluetooth: hci0: command 0x0409 tx timeout [ 85.945648][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 85.964083][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 85.978582][ T4323] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 86.020340][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 86.044015][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 86.075568][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 86.093954][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 86.116478][ T4323] device veth0_vlan entered promiscuous mode [ 86.126528][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 86.145311][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 86.159960][ T4323] device veth1_vlan entered promiscuous mode [ 86.197351][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 86.208611][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 86.234512][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 86.243428][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 86.256471][ T4323] device veth0_macvtap entered promiscuous mode [ 86.271667][ T4323] device veth1_macvtap entered promiscuous mode [ 86.290224][ T4323] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 86.300962][ T1274] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 86.309725][ T1274] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 86.318582][ T1274] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 86.330273][ T1274] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 86.346233][ T4323] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 86.355158][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 86.365976][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 86.379768][ T4323] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 86.389492][ T4323] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 86.399390][ T4323] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 86.409694][ T4323] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 86.544741][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 86.558773][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 86.583036][ T4325] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 86.623932][ T4325] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 86.636449][ T4325] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 86.646876][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 86.963241][ T4425] [ 86.965915][ T4425] ====================================================== [ 86.973221][ T4425] WARNING: possible circular locking dependency detected [ 86.980737][ T4425] syzkaller #0 Not tainted [ 86.985845][ T4425] ------------------------------------------------------ [ 86.993327][ T4425] syz.0.17/4425 is trying to acquire lock: [ 86.999816][ T4425] ffff88807c199028 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xfa/0x210 [ 87.011865][ T4425] [ 87.011865][ T4425] but task is already holding lock: [ 87.019615][ T4425] ffffffff8d6d6b68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x1ae/0x560 [ 87.031080][ T4425] [ 87.031080][ T4425] which lock already depends on the new lock. [ 87.031080][ T4425] [ 87.042766][ T4425] [ 87.042766][ T4425] the existing dependency chain (in reverse order) is: [ 87.052390][ T4425] [ 87.052390][ T4425] -> #4 (rfkill_global_mutex){+.+.}-{3:3}: [ 87.060599][ T4425] __mutex_lock_common+0x1e5/0x2400 [ 87.066613][ T4425] mutex_lock_nested+0x17/0x20 [ 87.072045][ T4425] rfkill_register+0x2f/0x970 [ 87.077355][ T4425] hci_register_dev+0x459/0x980 [ 87.083216][ T4425] vhci_create_device+0x32e/0x5c0 [ 87.089056][ T4425] vhci_write+0x389/0x440 [ 87.094226][ T4425] vfs_write+0x748/0xd70 [ 87.099551][ T4425] ksys_write+0x153/0x260 [ 87.105230][ T4425] do_syscall_64+0x4c/0xa0 [ 87.110811][ T4425] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 87.117353][ T4425] [ 87.117353][ T4425] -> #3 (&data->open_mutex){+.+.}-{3:3}: [ 87.125444][ T4425] __mutex_lock_common+0x1e5/0x2400 [ 87.131742][ T4425] mutex_lock_nested+0x17/0x20 [ 87.137150][ T4425] vhci_send_frame+0x88/0x100 [ 87.143497][ T4425] hci_send_frame+0x1a9/0x2e0 [ 87.149062][ T4425] hci_tx_work+0x9b5/0x16d0 [ 87.154884][ T4425] process_one_work+0x867/0xff0 [ 87.160892][ T4425] worker_thread+0xad7/0x12a0 [ 87.166430][ T4425] kthread+0x42e/0x520 [ 87.171767][ T4425] ret_from_fork+0x1f/0x30 [ 87.178260][ T4425] [ 87.178260][ T4425] -> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}: [ 87.188375][ T4425] __flush_work+0x116/0x210 [ 87.195332][ T4425] hci_dev_do_close+0x201/0x1020 [ 87.201134][ T4425] hci_unregister_dev+0x2eb/0x590 [ 87.207912][ T4425] vhci_release+0x73/0xc0 [ 87.213476][ T4425] __fput+0x212/0x8c0 [ 87.218634][ T4425] task_work_run+0x125/0x1a0 [ 87.223868][ T4425] do_exit+0x635/0x2110 [ 87.229800][ T4425] do_group_exit+0x12c/0x2f0 [ 87.236030][ T4425] get_signal+0x7eb/0x12e0 [ 87.241342][ T4425] arch_do_signal_or_restart+0xe6/0x12a0 [ 87.247583][ T4425] exit_to_user_mode_loop+0x9e/0x130 [ 87.254217][ T4425] exit_to_user_mode_prepare+0xee/0x180 [ 87.261203][ T4425] syscall_exit_to_user_mode+0x16/0x40 [ 87.267657][ T4425] do_syscall_64+0x58/0xa0 [ 87.273244][ T4425] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 87.280129][ T4425] [ 87.280129][ T4425] -> #1 (&hdev->req_lock){+.+.}-{3:3}: [ 87.289747][ T4425] __mutex_lock_common+0x1e5/0x2400 [ 87.296401][ T4425] mutex_lock_nested+0x17/0x20 [ 87.303317][ T4425] bg_scan_update+0x44/0x3b0 [ 87.308994][ T4425] process_one_work+0x867/0xff0 [ 87.314582][ T4425] worker_thread+0xad7/0x12a0 [ 87.319902][ T4425] kthread+0x42e/0x520 [ 87.324691][ T4425] ret_from_fork+0x1f/0x30 [ 87.329975][ T4425] [ 87.329975][ T4425] -> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}: [ 87.340015][ T4425] __lock_acquire+0x2c66/0x7b50 [ 87.345613][ T4425] lock_acquire+0x19e/0x400 [ 87.350665][ T4425] __flush_work+0x116/0x210 [ 87.355832][ T4425] __cancel_work_timer+0x3f4/0x560 [ 87.362263][ T4425] hci_request_cancel_all+0xcc/0x300 [ 87.368229][ T4425] hci_dev_do_close+0x4e/0x1020 [ 87.373989][ T4425] hci_rfkill_set_block+0x101/0x180 [ 87.379909][ T4425] rfkill_set_block+0x1c1/0x3c0 [ 87.385578][ T4425] rfkill_fop_write+0x453/0x560 [ 87.391243][ T4425] vfs_write+0x304/0xd70 [ 87.396125][ T4425] ksys_write+0x153/0x260 [ 87.401109][ T4425] do_syscall_64+0x4c/0xa0 [ 87.406180][ T4425] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 87.413779][ T4425] [ 87.413779][ T4425] other info that might help us debug this: [ 87.413779][ T4425] [ 87.424914][ T4425] Chain exists of: [ 87.424914][ T4425] (work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex [ 87.424914][ T4425] [ 87.442690][ T4425] Possible unsafe locking scenario: [ 87.442690][ T4425] [ 87.450677][ T4425] CPU0 CPU1 [ 87.456533][ T4425] ---- ---- [ 87.462927][ T4425] lock(rfkill_global_mutex); [ 87.467809][ T4425] lock(&data->open_mutex); [ 87.475214][ T4425] lock(rfkill_global_mutex); [ 87.483092][ T4425] lock((work_completion)(&hdev->bg_scan_update)); [ 87.489978][ T4425] [ 87.489978][ T4425] *** DEADLOCK *** [ 87.489978][ T4425] [ 87.498500][ T4425] 1 lock held by syz.0.17/4425: [ 87.503372][ T4425] #0: ffffffff8d6d6b68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x1ae/0x560 [ 87.513502][ T4425] [ 87.513502][ T4425] stack backtrace: [ 87.519423][ T4425] CPU: 0 PID: 4425 Comm: syz.0.17 Not tainted syzkaller #0 [ 87.527119][ T4425] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 87.538182][ T4425] Call Trace: [ 87.541564][ T4425] [ 87.544738][ T4425] dump_stack_lvl+0x188/0x250 [ 87.551138][ T4425] ? load_image+0x410/0x410 [ 87.556142][ T4425] ? show_regs_print_info+0x20/0x20 [ 87.561600][ T4425] ? print_circular_bug+0x12b/0x1a0 [ 87.566834][ T4425] check_noncircular+0x296/0x330 [ 87.571804][ T4425] ? look_up_lock_class+0x71/0x110 [ 87.577621][ T4425] ? add_chain_block+0x9b0/0x9b0 [ 87.582953][ T4425] ? lockdep_lock+0xf1/0x1f0 [ 87.587672][ T4425] ? __lock_acquire+0x1305/0x7b50 [ 87.593319][ T4425] ? mark_lock+0x94/0x320 [ 87.597872][ T4425] ? _find_first_zero_bit+0xd1/0xf0 [ 87.603286][ T4425] __lock_acquire+0x2c66/0x7b50 [ 87.608434][ T4425] ? verify_lock_unused+0x140/0x140 [ 87.613889][ T4425] ? lockdep_hardirqs_on_prepare+0x448/0x7c0 [ 87.620065][ T4425] ? verify_lock_unused+0x140/0x140 [ 87.625521][ T4425] ? asm_sysvec_apic_timer_interrupt+0x16/0x20 [ 87.631722][ T4425] lock_acquire+0x19e/0x400 [ 87.636441][ T4425] ? __flush_work+0xfa/0x210 [ 87.641073][ T4425] ? __lock_acquire+0x7b50/0x7b50 [ 87.646223][ T4425] ? read_lock_is_recursive+0x10/0x10 [ 87.651627][ T4425] ? start_flush_work+0x784/0x830 [ 87.656781][ T4425] __flush_work+0x116/0x210 [ 87.661357][ T4425] ? __flush_work+0xfa/0x210 [ 87.665979][ T4425] ? flush_work+0x20/0x20 [ 87.670332][ T4425] ? try_to_grab_pending+0xfb/0x820 [ 87.675871][ T4425] ? mark_lock+0x94/0x320 [ 87.680231][ T4425] ? lockdep_hardirqs_on_prepare+0x448/0x7c0 [ 87.686247][ T4425] ? lock_chain_count+0x20/0x20 [ 87.691324][ T4425] ? mark_lock+0x94/0x320 [ 87.695777][ T4425] ? __cancel_work_timer+0x36a/0x560 [ 87.701638][ T4425] __cancel_work_timer+0x3f4/0x560 [ 87.707169][ T4425] ? cancel_work_sync+0x20/0x20 [ 87.712594][ T4425] ? __cancel_work+0x1f9/0x2e0 [ 87.717426][ T4425] ? lockdep_hardirqs_on+0x94/0x140 [ 87.723224][ T4425] ? __cancel_work+0x27b/0x2e0 [ 87.728115][ T4425] ? cancel_work+0x20/0x20 [ 87.732745][ T4425] hci_request_cancel_all+0xcc/0x300 [ 87.738067][ T4425] hci_dev_do_close+0x4e/0x1020 [ 87.743039][ T4425] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 87.748969][ T4425] ? _raw_spin_unlock+0x40/0x40 [ 87.753865][ T4425] hci_rfkill_set_block+0x101/0x180 [ 87.759800][ T4425] ? rcu_lock_release+0x20/0x20 [ 87.764774][ T4425] rfkill_set_block+0x1c1/0x3c0 [ 87.769661][ T4425] rfkill_fop_write+0x453/0x560 [ 87.774626][ T4425] ? rfkill_fop_read+0x560/0x560 [ 87.779681][ T4425] ? common_file_perm+0x160/0x1c0 [ 87.784745][ T4425] ? fsnotify_perm+0x5d/0x560 [ 87.789730][ T4425] ? security_file_permission+0x75/0xa0 [ 87.795483][ T4425] ? rfkill_fop_read+0x560/0x560 [ 87.800457][ T4425] vfs_write+0x304/0xd70 [ 87.805027][ T4425] ? file_end_write+0x250/0x250 [ 87.810688][ T4425] ? __context_tracking_exit+0x4c/0x80 [ 87.816188][ T4425] ? __fdget_pos+0x1e2/0x370 [ 87.820811][ T4425] ksys_write+0x153/0x260 [ 87.825346][ T4425] ? __ia32_sys_read+0x80/0x80 [ 87.830153][ T4425] ? lockdep_hardirqs_on+0x94/0x140 [ 87.835633][ T4425] do_syscall_64+0x4c/0xa0 [ 87.840095][ T4425] ? clear_bhb_loop+0x30/0x80 [ 87.844822][ T4425] ? clear_bhb_loop+0x30/0x80 [ 87.850027][ T4425] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 87.856046][ T4425] RIP: 0033:0x7f387bbce159 [ 87.860591][ T4425] 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 [ 87.863792][ T23] Bluetooth: hci0: command 0x041b tx timeout [ 87.880707][ T4425] RSP: 002b:00007ffe5694e4f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 87.880737][ T4425] RAX: ffffffffffffffda RBX: 00007f387be55fa0 RCX: 00007f387bbce159 [ 87.880750][ T4425] RDX: 0000000000000008 RSI: 0000200000000040 RDI: 0000000000000003 [ 87.880760][ T4425] RBP: 00007f387bc6506b R08: 0000000000000000 R09: 0000000000000000 [ 87.880771][ T4425] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 87.880780][ T4425] R13: 00007f387be55fac R14: 00007f387be55fa0 R15: 00007f387be55fa0 [ 87.880798][ T4425]