no interfaces have a carrier [ 42.855137][ T3854] 8021q: adding VLAN 0 to HW filter on device bond0 [ 42.871097][ T3854] eql: remember to turn off Van-Jacobson compression on your slave devices Starting crond: OK Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.185' (ED25519) to the list of known hosts. 2025/08/02 20:12:33 ignoring optional flag "sandboxArg"="0" 2025/08/02 20:12:34 parsed 1 programs syzkaller login: [ 71.362630][ T4189] cgroup: Unknown subsys name 'net' [ 71.510522][ T4189] cgroup: Unknown subsys name 'rlimit' [ 73.099036][ T4189] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 74.723503][ T4204] chnl_net:caif_netlink_parms(): no params data found [ 74.779656][ T4204] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.787700][ T4204] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.795945][ T4204] device bridge_slave_0 entered promiscuous mode [ 74.809051][ T4204] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.816868][ T4204] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.825815][ T4204] device bridge_slave_1 entered promiscuous mode [ 74.849677][ T4204] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 74.863297][ T4204] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 74.890429][ T4204] team0: Port device team_slave_0 added [ 74.898389][ T4204] team0: Port device team_slave_1 added [ 74.923267][ T4204] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 74.930620][ T4204] 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. [ 74.956977][ T4204] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 74.972648][ T4204] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 74.979799][ T4204] 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. [ 75.006907][ T4204] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 75.043281][ T4204] device hsr_slave_0 entered promiscuous mode [ 75.051238][ T4204] device hsr_slave_1 entered promiscuous mode [ 75.157484][ T4204] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 75.168956][ T4204] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 75.178428][ T4204] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 75.189937][ T4204] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 75.227873][ T4204] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.235173][ T4204] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.244197][ T4204] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.251615][ T4204] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.317926][ T4204] 8021q: adding VLAN 0 to HW filter on device bond0 [ 75.332085][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 75.343876][ T144] bridge0: port 1(bridge_slave_0) entered disabled state [ 75.355111][ T144] bridge0: port 2(bridge_slave_1) entered disabled state [ 75.364096][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 75.379421][ T4204] 8021q: adding VLAN 0 to HW filter on device team0 [ 75.392458][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 75.402368][ T144] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.409534][ T144] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.425843][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 75.435392][ T144] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.443065][ T144] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.470410][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 75.480615][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 75.495922][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 75.520473][ T4204] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 75.532560][ T4204] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 75.546276][ T4218] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 75.556826][ T4218] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 75.571273][ T4218] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 75.692350][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 75.701317][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 75.716263][ T4204] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 75.741613][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 75.751732][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 75.775659][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 75.784689][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 75.793626][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 75.811587][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 75.823133][ T4204] device veth0_vlan entered promiscuous mode [ 75.838994][ T4204] device veth1_vlan entered promiscuous mode [ 75.863458][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 75.875276][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 75.884503][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 75.893670][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 75.906558][ T4204] device veth0_macvtap entered promiscuous mode [ 75.917357][ T4204] device veth1_macvtap entered promiscuous mode [ 75.939436][ T4204] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 75.949365][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 75.959586][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 75.968140][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 75.977487][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 75.991733][ T4204] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 76.000192][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 76.010853][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 76.023409][ T4204] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.033397][ T4204] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.043426][ T4204] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.053097][ T4204] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.176587][ T4204] syz-executor (4204) used greatest stack depth: 20288 bytes left [ 76.656468][ T9] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 78.914779][ T9] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 81.079999][ T9] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 81.153309][ T9] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 81.547230][ T144] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 81.564085][ T144] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 81.582988][ T154] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 81.590441][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 81.600939][ T154] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 81.626695][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 82.284033][ T9] device hsr_slave_0 left promiscuous mode [ 82.303193][ T9] device hsr_slave_1 left promiscuous mode [ 82.312947][ T9] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 82.322119][ T9] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 82.330953][ T9] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 82.345403][ T9] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 82.367608][ T9] device bridge_slave_1 left promiscuous mode [ 82.375710][ T9] bridge0: port 2(bridge_slave_1) entered disabled state [ 82.396006][ T9] device bridge_slave_0 left promiscuous mode [ 82.402428][ T9] bridge0: port 1(bridge_slave_0) entered disabled state [ 82.447437][ T9] device veth1_macvtap left promiscuous mode [ 82.464039][ T9] device veth0_macvtap left promiscuous mode [ 82.470696][ T9] device veth1_vlan left promiscuous mode [ 82.495119][ T9] device veth0_vlan left promiscuous mode [ 82.716087][ T9] team0 (unregistering): Port device team_slave_1 removed [ 82.729931][ T9] team0 (unregistering): Port device team_slave_0 removed [ 82.743580][ T9] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 82.760818][ T9] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 82.815765][ T9] bond0 (unregistering): Released all slaves 2025/08/02 20:12:49 executed programs: 0 [ 84.188795][ T4341] chnl_net:caif_netlink_parms(): no params data found [ 84.337994][ T4341] bridge0: port 1(bridge_slave_0) entered blocking state [ 84.353931][ T4341] bridge0: port 1(bridge_slave_0) entered disabled state [ 84.373921][ T4341] device bridge_slave_0 entered promiscuous mode [ 84.395150][ T4341] bridge0: port 2(bridge_slave_1) entered blocking state [ 84.405420][ T4341] bridge0: port 2(bridge_slave_1) entered disabled state [ 84.414175][ T4341] device bridge_slave_1 entered promiscuous mode [ 84.449289][ T4341] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 84.461544][ T4341] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 84.509619][ T4341] team0: Port device team_slave_0 added [ 84.528840][ T4341] team0: Port device team_slave_1 added [ 84.588625][ T4341] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 84.600911][ T4341] 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. [ 84.629310][ T4341] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 84.649433][ T4341] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 84.656900][ T4341] 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. [ 84.683518][ T4341] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 84.768101][ T4341] device hsr_slave_0 entered promiscuous mode [ 84.775531][ T4341] device hsr_slave_1 entered promiscuous mode [ 85.715252][ T4341] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 85.725841][ T4341] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 85.736309][ T4341] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 85.750744][ T4341] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 85.832363][ T4341] 8021q: adding VLAN 0 to HW filter on device bond0 [ 85.850226][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 85.860348][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 85.871507][ T4341] 8021q: adding VLAN 0 to HW filter on device team0 [ 85.882921][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 85.893098][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 85.903162][ T144] bridge0: port 1(bridge_slave_0) entered blocking state [ 85.910632][ T144] bridge0: port 1(bridge_slave_0) entered forwarding state [ 85.921847][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 85.936734][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 85.945381][ T21] Bluetooth: hci0: command 0x0409 tx timeout [ 85.946820][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 85.962578][ T144] bridge0: port 2(bridge_slave_1) entered blocking state [ 85.969860][ T144] bridge0: port 2(bridge_slave_1) entered forwarding state [ 85.982082][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 86.033343][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 86.057250][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 86.077597][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 86.088367][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 86.097562][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 86.111658][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 86.121867][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 86.132393][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 86.141082][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 86.152999][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 86.365303][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 86.373138][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 86.387392][ T4341] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 86.443095][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 86.455716][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 86.479371][ T4341] device veth0_vlan entered promiscuous mode [ 86.486237][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 86.497851][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 86.507126][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 86.516786][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 86.565155][ T4341] device veth1_vlan entered promiscuous mode [ 86.590103][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 86.603066][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 86.612008][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 86.622604][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 86.635891][ T4341] device veth0_macvtap entered promiscuous mode [ 86.691066][ T4341] device veth1_macvtap entered promiscuous mode [ 86.710913][ T4341] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 86.719804][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 86.729881][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 86.739154][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 86.755378][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 86.768305][ T4341] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 86.778431][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 86.788519][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 86.836438][ T13] cfg80211: failed to load regulatory.db [ 86.846198][ T4341] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 86.865475][ T4341] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 86.895015][ T4341] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 86.913829][ T4341] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 87.173329][ T144] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 87.208405][ T144] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 87.270215][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 87.297455][ T155] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 87.307030][ T155] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 87.400972][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 87.614973][ T4485] [ 87.617351][ T4485] ====================================================== [ 87.624387][ T4485] WARNING: possible circular locking dependency detected [ 87.631428][ T4485] 5.15.189-syzkaller #0 Not tainted [ 87.636727][ T4485] ------------------------------------------------------ [ 87.643753][ T4485] syz.0.17/4485 is trying to acquire lock: [ 87.649862][ T4485] ffff888025368c28 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xc1/0x1b0 [ 87.661071][ T4485] [ 87.661071][ T4485] but task is already holding lock: [ 87.668616][ T4485] ffffffff8d4be228 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x19e/0x560 [ 87.678311][ T4485] [ 87.678311][ T4485] which lock already depends on the new lock. [ 87.678311][ T4485] [ 87.688822][ T4485] [ 87.688822][ T4485] the existing dependency chain (in reverse order) is: [ 87.698186][ T4485] [ 87.698186][ T4485] -> #4 (rfkill_global_mutex){+.+.}-{3:3}: [ 87.706209][ T4485] __mutex_lock_common+0x1eb/0x2390 [ 87.711959][ T4485] mutex_lock_nested+0x17/0x20 [ 87.717260][ T4485] rfkill_register+0x33/0x8a0 [ 87.722487][ T4485] hci_register_dev+0x452/0x970 [ 87.727888][ T4485] vhci_create_device+0x32c/0x5c0 [ 87.733472][ T4485] vhci_write+0x391/0x450 [ 87.738537][ T4485] vfs_write+0x712/0xd00 [ 87.743335][ T4485] ksys_write+0x14d/0x250 [ 87.748343][ T4485] do_syscall_64+0x4c/0xa0 [ 87.753310][ T4485] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 87.759752][ T4485] [ 87.759752][ T4485] -> #3 (&data->open_mutex){+.+.}-{3:3}: [ 87.767596][ T4485] __mutex_lock_common+0x1eb/0x2390 [ 87.773614][ T4485] mutex_lock_nested+0x17/0x20 [ 87.779262][ T4485] vhci_send_frame+0x88/0x100 [ 87.784489][ T4485] hci_send_frame+0x1a9/0x2e0 [ 87.789737][ T4485] hci_tx_work+0x9f9/0x1710 [ 87.794794][ T4485] process_one_work+0x863/0x1000 [ 87.800279][ T4485] worker_thread+0xaa8/0x12a0 [ 87.805504][ T4485] kthread+0x436/0x520 [ 87.810127][ T4485] ret_from_fork+0x1f/0x30 [ 87.815106][ T4485] [ 87.815106][ T4485] -> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}: [ 87.824357][ T4485] __flush_work+0xdd/0x1b0 [ 87.829494][ T4485] hci_dev_do_close+0x1e7/0x1030 [ 87.835244][ T4485] hci_unregister_dev+0x2d7/0x580 [ 87.840814][ T4485] vhci_release+0x73/0xc0 [ 87.845851][ T4485] __fput+0x234/0x930 [ 87.850398][ T4485] task_work_run+0x125/0x1a0 [ 87.855558][ T4485] do_exit+0x61e/0x20a0 [ 87.860373][ T4485] do_group_exit+0x12e/0x300 [ 87.865522][ T4485] get_signal+0x6ca/0x12c0 [ 87.870485][ T4485] arch_do_signal_or_restart+0xc1/0x1300 [ 87.876748][ T4485] exit_to_user_mode_loop+0x9e/0x130 [ 87.882689][ T4485] exit_to_user_mode_prepare+0xb1/0x140 [ 87.889230][ T4485] syscall_exit_to_user_mode+0x16/0x40 [ 87.895359][ T4485] do_syscall_64+0x58/0xa0 [ 87.900336][ T4485] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 87.906791][ T4485] [ 87.906791][ T4485] -> #1 (&hdev->req_lock){+.+.}-{3:3}: [ 87.914464][ T4485] __mutex_lock_common+0x1eb/0x2390 [ 87.920221][ T4485] mutex_lock_nested+0x17/0x20 [ 87.925534][ T4485] bg_scan_update+0x44/0x3b0 [ 87.930673][ T4485] process_one_work+0x863/0x1000 [ 87.936327][ T4485] worker_thread+0xaa8/0x12a0 [ 87.941817][ T4485] kthread+0x436/0x520 [ 87.946532][ T4485] ret_from_fork+0x1f/0x30 [ 87.951597][ T4485] [ 87.951597][ T4485] -> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}: [ 87.961529][ T4485] __lock_acquire+0x2c33/0x7c60 [ 87.967233][ T4485] lock_acquire+0x197/0x3f0 [ 87.972298][ T4485] __flush_work+0xdd/0x1b0 [ 87.977385][ T4485] __cancel_work_timer+0x3ac/0x520 [ 87.983035][ T4485] hci_request_cancel_all+0xcc/0x300 [ 87.988996][ T4485] hci_dev_do_close+0x4e/0x1030 [ 87.994392][ T4485] hci_rfkill_set_block+0x10a/0x190 [ 88.000260][ T4485] rfkill_set_block+0x1c6/0x420 [ 88.006108][ T4485] rfkill_fop_write+0x458/0x560 [ 88.011709][ T4485] vfs_write+0x300/0xd00 [ 88.016517][ T4485] ksys_write+0x14d/0x250 [ 88.021389][ T4485] do_syscall_64+0x4c/0xa0 [ 88.024503][ T21] Bluetooth: hci0: command 0x041b tx timeout [ 88.026347][ T4485] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 88.039357][ T4485] [ 88.039357][ T4485] other info that might help us debug this: [ 88.039357][ T4485] [ 88.050124][ T4485] Chain exists of: [ 88.050124][ T4485] (work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex [ 88.050124][ T4485] [ 88.065878][ T4485] Possible unsafe locking scenario: [ 88.065878][ T4485] [ 88.073434][ T4485] CPU0 CPU1 [ 88.078825][ T4485] ---- ---- [ 88.084218][ T4485] lock(rfkill_global_mutex); [ 88.089552][ T4485] lock(&data->open_mutex); [ 88.096691][ T4485] lock(rfkill_global_mutex); [ 88.103997][ T4485] lock((work_completion)(&hdev->bg_scan_update)); [ 88.110779][ T4485] [ 88.110779][ T4485] *** DEADLOCK *** [ 88.110779][ T4485] [ 88.118939][ T4485] 1 lock held by syz.0.17/4485: [ 88.123829][ T4485] #0: ffffffff8d4be228 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x19e/0x560 [ 88.134219][ T4485] [ 88.134219][ T4485] stack backtrace: [ 88.140165][ T4485] CPU: 0 PID: 4485 Comm: syz.0.17 Not tainted 5.15.189-syzkaller #0 [ 88.148403][ T4485] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 88.158773][ T4485] Call Trace: [ 88.162059][ T4485] [ 88.164995][ T4485] dump_stack_lvl+0x168/0x230 [ 88.169755][ T4485] ? load_image+0x3b0/0x3b0 [ 88.174266][ T4485] ? show_regs_print_info+0x20/0x20 [ 88.179474][ T4485] ? print_circular_bug+0x12b/0x1a0 [ 88.184676][ T4485] check_noncircular+0x274/0x310 [ 88.189624][ T4485] ? add_chain_block+0x940/0x940 [ 88.194560][ T4485] ? lockdep_lock+0xdc/0x1e0 [ 88.199153][ T4485] ? __lock_acquire+0x12d9/0x7c60 [ 88.204299][ T4485] ? lockdep_lock+0x1e0/0x1e0 [ 88.208999][ T4485] ? mark_lock+0x94/0x320 [ 88.213573][ T4485] __lock_acquire+0x2c33/0x7c60 [ 88.218454][ T4485] ? verify_lock_unused+0x140/0x140 [ 88.223678][ T4485] ? verify_lock_unused+0x140/0x140 [ 88.229037][ T4485] lock_acquire+0x197/0x3f0 [ 88.233574][ T4485] ? __flush_work+0xc1/0x1b0 [ 88.238274][ T4485] ? __lock_acquire+0x7c60/0x7c60 [ 88.243346][ T4485] ? read_lock_is_recursive+0x10/0x10 [ 88.248766][ T4485] ? start_flush_work+0x776/0x820 [ 88.253881][ T4485] ? _raw_spin_unlock_irqrestore+0xaa/0x100 [ 88.259782][ T4485] ? _raw_spin_unlock+0x40/0x40 [ 88.264839][ T4485] __flush_work+0xdd/0x1b0 [ 88.269351][ T4485] ? __flush_work+0xc1/0x1b0 [ 88.274197][ T4485] ? flush_work+0x20/0x20 [ 88.278546][ T4485] ? try_to_grab_pending+0xf3/0x7e0 [ 88.283765][ T4485] ? lockdep_hardirqs_off+0x70/0x100 [ 88.289166][ T4485] ? mark_lock+0x94/0x320 [ 88.293781][ T4485] ? lockdep_hardirqs_on_prepare+0x3fc/0x760 [ 88.299792][ T4485] ? lock_chain_count+0x20/0x20 [ 88.304757][ T4485] ? mark_lock+0x94/0x320 [ 88.309110][ T4485] ? __cancel_work_timer+0x331/0x520 [ 88.314504][ T4485] __cancel_work_timer+0x3ac/0x520 [ 88.319731][ T4485] ? cancel_work_sync+0x20/0x20 [ 88.324589][ T4485] ? __cancel_work+0x1f4/0x2d0 [ 88.329390][ T4485] ? lockdep_hardirqs_on+0x94/0x140 [ 88.334697][ T4485] ? __cancel_work+0x26f/0x2d0 [ 88.339466][ T4485] ? cancel_work+0x20/0x20 [ 88.344268][ T4485] ? lock_chain_count+0x20/0x20 [ 88.349289][ T4485] hci_request_cancel_all+0xcc/0x300 [ 88.354603][ T4485] hci_dev_do_close+0x4e/0x1030 [ 88.359648][ T4485] ? _raw_spin_unlock_irqrestore+0xaa/0x100 [ 88.365629][ T4485] ? _raw_spin_unlock+0x40/0x40 [ 88.370862][ T4485] hci_rfkill_set_block+0x10a/0x190 [ 88.376177][ T4485] ? rcu_lock_release+0x20/0x20 [ 88.381123][ T4485] rfkill_set_block+0x1c6/0x420 [ 88.385983][ T4485] rfkill_fop_write+0x458/0x560 [ 88.390842][ T4485] ? verify_lock_unused+0x140/0x140 [ 88.396141][ T4485] ? rfkill_fop_read+0x4b0/0x4b0 [ 88.401189][ T4485] ? common_file_perm+0x150/0x1c0 [ 88.406243][ T4485] ? fsnotify_perm+0x5d/0x560 [ 88.410957][ T4485] ? security_file_permission+0x75/0xa0 [ 88.416532][ T4485] ? rfkill_fop_read+0x4b0/0x4b0 [ 88.421496][ T4485] vfs_write+0x300/0xd00 [ 88.425750][ T4485] ? file_end_write+0x250/0x250 [ 88.430697][ T4485] ? __context_tracking_exit+0x4c/0x80 [ 88.436344][ T4485] ? __lock_acquire+0x7c60/0x7c60 [ 88.441545][ T4485] ? __fdget_pos+0x1e2/0x370 [ 88.446526][ T4485] ksys_write+0x14d/0x250 [ 88.451150][ T4485] ? __ia32_sys_read+0x80/0x80 [ 88.456025][ T4485] ? lockdep_hardirqs_on+0x94/0x140 [ 88.461433][ T4485] do_syscall_64+0x4c/0xa0 [ 88.465869][ T4485] ? clear_bhb_loop+0x30/0x80 [ 88.470551][ T4485] ? clear_bhb_loop+0x30/0x80 [ 88.475244][ T4485] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 88.481173][ T4485] RIP: 0033:0x7f690e618b69 [ 88.485592][ T4485] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 [ 88.505665][ T4485] RSP: 002b:00007fff3ad729d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 88.514082][ T4485] RAX: ffffffffffffffda RBX: 00007f690e83ffa0 RCX: 00007f690e618b69 [ 88.522279][ T4485] RDX: 0000000000000008 RSI: 0000200000000000 RDI: 0000000000000003 [ 88.530261][ T4485] RBP: 00007f690e69bdf1 R08: 0000000000000000 R09: 0000000000000000 [ 88.538341][ T4485] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 88.546340][ T4485] R13: 00007f690e83ffa0 R14: 00007f690e83ffa0 R15: 0000000000000003 [ 88.554335][ T4485]