Warning: Permanently added '10.128.1.231' (ED25519) to the list of known hosts. 2025/08/10 14:17:45 ignoring optional flag "sandboxArg"="0" 2025/08/10 14:17:46 parsed 1 programs syzkaller login: [ 53.775504][ T4188] cgroup: Unknown subsys name 'net' [ 53.877852][ T4188] cgroup: Unknown subsys name 'rlimit' [ 55.093592][ T4188] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 56.485459][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 56.493562][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 56.503364][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 56.523716][ T4202] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 56.531593][ T4202] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 56.539981][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 57.756291][ T4227] syz-executor (4227) used greatest stack depth: 20960 bytes left [ 58.296765][ T4239] chnl_net:caif_netlink_parms(): no params data found [ 58.334950][ T4239] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.342572][ T4239] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.351019][ T4239] device bridge_slave_0 entered promiscuous mode [ 58.361269][ T4239] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.368877][ T4239] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.376785][ T4239] device bridge_slave_1 entered promiscuous mode [ 58.398206][ T4239] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.408895][ T4239] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.428876][ T4239] team0: Port device team_slave_0 added [ 58.435934][ T4239] team0: Port device team_slave_1 added [ 58.451688][ T4239] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 58.458797][ T4239] 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. [ 58.484843][ T4239] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 58.497745][ T4239] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 58.505085][ T4239] 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. [ 58.531030][ T4239] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 58.556774][ T4239] device hsr_slave_0 entered promiscuous mode [ 58.563667][ T4239] device hsr_slave_1 entered promiscuous mode [ 58.643583][ T4239] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 58.653483][ T4239] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 58.662027][ T4239] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 58.671401][ T4239] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 58.695029][ T4239] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.702170][ T4239] bridge0: port 2(bridge_slave_1) entered forwarding state [ 58.710157][ T4239] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.717237][ T4239] bridge0: port 1(bridge_slave_0) entered forwarding state [ 58.747621][ T421] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.756561][ T421] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.810163][ T4239] 8021q: adding VLAN 0 to HW filter on device bond0 [ 58.842280][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 58.850424][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 58.861512][ T4239] 8021q: adding VLAN 0 to HW filter on device team0 [ 58.871006][ T421] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 58.881195][ T421] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 58.890309][ T421] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.897428][ T421] bridge0: port 1(bridge_slave_0) entered forwarding state [ 58.924214][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 58.933021][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 58.941576][ T4202] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.948788][ T4202] bridge0: port 2(bridge_slave_1) entered forwarding state [ 58.959633][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 58.987585][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 58.996605][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 59.006318][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 59.015039][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 59.028440][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 59.037844][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 59.066516][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 59.075395][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 59.086443][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 59.094984][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 59.106453][ T4239] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 59.207569][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 59.216054][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 59.229270][ T4239] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 59.257042][ T421] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 59.266079][ T421] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 59.282368][ T421] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 59.291080][ T421] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 59.300501][ T421] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 59.308594][ T421] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 59.319096][ T4239] device veth0_vlan entered promiscuous mode [ 59.342717][ T4239] device veth1_vlan entered promiscuous mode [ 59.362198][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 59.371848][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 59.380273][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 59.388809][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 59.399252][ T4239] device veth0_macvtap entered promiscuous mode [ 59.418927][ T4239] device veth1_macvtap entered promiscuous mode [ 59.441073][ T4239] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 59.448771][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 59.457572][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 59.465575][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 59.474795][ T4202] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 59.486815][ T4239] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 59.494254][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 59.503769][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 59.522410][ T4239] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 59.531868][ T4239] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 59.542051][ T4239] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 59.551071][ T4239] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 59.693936][ T4239] syz-executor (4239) used greatest stack depth: 20544 bytes left 2025/08/10 14:17:54 executed programs: 0 [ 60.554474][ T4299] chnl_net:caif_netlink_parms(): no params data found [ 60.613976][ T4299] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.621124][ T4299] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.629486][ T4299] device bridge_slave_0 entered promiscuous mode [ 60.645364][ T4299] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.652449][ T4299] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.660954][ T4299] device bridge_slave_1 entered promiscuous mode [ 60.692109][ T4299] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.708554][ T4299] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.736503][ T4299] team0: Port device team_slave_0 added [ 60.744482][ T4299] team0: Port device team_slave_1 added [ 60.762273][ T4299] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 60.769298][ T4299] 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. [ 60.795564][ T4299] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 60.809706][ T4299] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 60.817003][ T4299] 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. [ 60.843256][ T4299] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 60.875426][ T4299] device hsr_slave_0 entered promiscuous mode [ 60.882217][ T4299] device hsr_slave_1 entered promiscuous mode [ 60.889343][ T4299] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 60.897479][ T4299] Cannot create hsr debugfs directory [ 60.985512][ T4299] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 62.473834][ T4254] Bluetooth: hci0: command 0x0409 tx timeout [ 64.089366][ T4299] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 64.563461][ T13] Bluetooth: hci0: command 0x041b tx timeout [ 65.057885][ T4299] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 65.109431][ T4299] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 65.308600][ T4299] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 65.318821][ T4299] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 65.334329][ T4299] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 65.342777][ T4299] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 65.369792][ T154] device hsr_slave_0 left promiscuous mode [ 65.376386][ T154] device hsr_slave_1 left promiscuous mode [ 65.382618][ T154] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 65.391164][ T154] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 65.399177][ T154] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 65.406735][ T154] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 65.414653][ T154] device bridge_slave_1 left promiscuous mode [ 65.421461][ T154] bridge0: port 2(bridge_slave_1) entered disabled state [ 65.435545][ T154] device bridge_slave_0 left promiscuous mode [ 65.441845][ T154] bridge0: port 1(bridge_slave_0) entered disabled state [ 65.457908][ T154] device veth1_macvtap left promiscuous mode [ 65.464323][ T154] device veth0_macvtap left promiscuous mode [ 65.470354][ T154] device veth1_vlan left promiscuous mode [ 65.476391][ T154] device veth0_vlan left promiscuous mode [ 65.592759][ T154] team0 (unregistering): Port device team_slave_1 removed [ 65.616600][ T154] team0 (unregistering): Port device team_slave_0 removed [ 65.628617][ T154] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 65.640764][ T154] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 65.687628][ T154] bond0 (unregistering): Released all slaves [ 65.737640][ T4299] 8021q: adding VLAN 0 to HW filter on device bond0 [ 65.751731][ T421] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 65.760658][ T421] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 65.780464][ T4299] 8021q: adding VLAN 0 to HW filter on device team0 [ 65.790769][ T421] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 65.800123][ T421] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 65.808940][ T421] bridge0: port 1(bridge_slave_0) entered blocking state [ 65.816189][ T421] bridge0: port 1(bridge_slave_0) entered forwarding state [ 65.829516][ T421] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 65.838417][ T421] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 65.847155][ T421] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 65.855684][ T421] bridge0: port 2(bridge_slave_1) entered blocking state [ 65.862796][ T421] bridge0: port 2(bridge_slave_1) entered forwarding state [ 65.870652][ T421] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 65.892179][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 65.901252][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 65.912323][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 65.921884][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 65.931101][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 65.940368][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 65.954971][ T4299] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 65.967445][ T4299] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 65.980340][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 65.989179][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 65.998634][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 66.007126][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 66.016236][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 66.096402][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 66.104764][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 66.119416][ T4299] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 66.139146][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 66.149461][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 66.170028][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 66.178914][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 66.189073][ T4299] device veth0_vlan entered promiscuous mode [ 66.197905][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 66.206288][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 66.217980][ T4299] device veth1_vlan entered promiscuous mode [ 66.240622][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 66.249252][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 66.257900][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 66.267553][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 66.278180][ T4299] device veth0_macvtap entered promiscuous mode [ 66.288975][ T4299] device veth1_macvtap entered promiscuous mode [ 66.307270][ T4299] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 66.315874][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 66.324616][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 66.332740][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 66.343046][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 66.355743][ T4299] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 66.363942][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 66.373906][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 66.384910][ T4299] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 66.394013][ T4299] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 66.402708][ T4299] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 66.412782][ T4299] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 66.481406][ T4202] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 66.493223][ T4202] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 66.507942][ T421] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 66.518727][ T4202] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 66.527126][ T4202] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 66.536951][ T421] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 66.602724][ T4318] [ 66.605177][ T4318] ====================================================== [ 66.612184][ T4318] WARNING: possible circular locking dependency detected [ 66.619197][ T4318] 5.15.189-syzkaller #0 Not tainted [ 66.624382][ T4318] ------------------------------------------------------ [ 66.631383][ T4318] syz.0.17/4318 is trying to acquire lock: [ 66.637299][ T4318] ffff888078f0cc28 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xc1/0x1b0 [ 66.643468][ T4256] Bluetooth: hci0: command 0x040f tx timeout [ 66.648369][ T4318] [ 66.648369][ T4318] but task is already holding lock: [ 66.648376][ T4318] ffffffff8d4be228 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x19e/0x560 [ 66.671443][ T4318] [ 66.671443][ T4318] which lock already depends on the new lock. [ 66.671443][ T4318] [ 66.681842][ T4318] [ 66.681842][ T4318] the existing dependency chain (in reverse order) is: [ 66.690853][ T4318] [ 66.690853][ T4318] -> #4 (rfkill_global_mutex){+.+.}-{3:3}: [ 66.698947][ T4318] __mutex_lock_common+0x1eb/0x2390 [ 66.704669][ T4318] mutex_lock_nested+0x17/0x20 [ 66.709946][ T4318] rfkill_register+0x33/0x8a0 [ 66.715137][ T4318] hci_register_dev+0x452/0x970 [ 66.720496][ T4318] vhci_create_device+0x32c/0x5c0 [ 66.726023][ T4318] vhci_write+0x391/0x450 [ 66.730852][ T4318] vfs_write+0x712/0xd00 [ 66.735599][ T4318] ksys_write+0x14d/0x250 [ 66.740436][ T4318] do_syscall_64+0x4c/0xa0 [ 66.745355][ T4318] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 66.751759][ T4318] [ 66.751759][ T4318] -> #3 (&data->open_mutex){+.+.}-{3:3}: [ 66.759554][ T4318] __mutex_lock_common+0x1eb/0x2390 [ 66.765433][ T4318] mutex_lock_nested+0x17/0x20 [ 66.770699][ T4318] vhci_send_frame+0x88/0x100 [ 66.775880][ T4318] hci_send_frame+0x1a9/0x2e0 [ 66.781070][ T4318] hci_tx_work+0x9f9/0x1710 [ 66.786073][ T4318] process_one_work+0x863/0x1000 [ 66.791510][ T4318] worker_thread+0xaa8/0x12a0 [ 66.796691][ T4318] kthread+0x436/0x520 [ 66.801271][ T4318] ret_from_fork+0x1f/0x30 [ 66.806214][ T4318] [ 66.806214][ T4318] -> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}: [ 66.815420][ T4318] __flush_work+0xdd/0x1b0 [ 66.820344][ T4318] hci_dev_do_close+0x1e7/0x1030 [ 66.825784][ T4318] hci_unregister_dev+0x2d7/0x580 [ 66.831314][ T4318] vhci_release+0x73/0xc0 [ 66.836145][ T4318] __fput+0x234/0x930 [ 66.840625][ T4318] task_work_run+0x125/0x1a0 [ 66.845715][ T4318] do_exit+0x61e/0x20a0 [ 66.850456][ T4318] do_group_exit+0x12e/0x300 [ 66.855542][ T4318] get_signal+0x6ca/0x12c0 [ 66.860457][ T4318] arch_do_signal_or_restart+0xc1/0x1300 [ 66.866591][ T4318] exit_to_user_mode_loop+0x9e/0x130 [ 66.872462][ T4318] exit_to_user_mode_prepare+0xb1/0x140 [ 66.878503][ T4318] syscall_exit_to_user_mode+0x16/0x40 [ 66.884459][ T4318] do_syscall_64+0x58/0xa0 [ 66.889373][ T4318] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 66.895767][ T4318] [ 66.895767][ T4318] -> #1 (&hdev->req_lock){+.+.}-{3:3}: [ 66.903560][ T4318] __mutex_lock_common+0x1eb/0x2390 [ 66.909258][ T4318] mutex_lock_nested+0x17/0x20 [ 66.914516][ T4318] bg_scan_update+0x44/0x3b0 [ 66.919603][ T4318] process_one_work+0x863/0x1000 [ 66.925038][ T4318] worker_thread+0xaa8/0x12a0 [ 66.930213][ T4318] kthread+0x436/0x520 [ 66.934776][ T4318] ret_from_fork+0x1f/0x30 [ 66.939688][ T4318] [ 66.939688][ T4318] -> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}: [ 66.949474][ T4318] __lock_acquire+0x2c33/0x7c60 [ 66.954825][ T4318] lock_acquire+0x197/0x3f0 [ 66.959823][ T4318] __flush_work+0xdd/0x1b0 [ 66.964733][ T4318] __cancel_work_timer+0x3ac/0x520 [ 66.970342][ T4318] hci_request_cancel_all+0xcc/0x300 [ 66.976122][ T4318] hci_dev_do_close+0x4e/0x1030 [ 66.981467][ T4318] hci_rfkill_set_block+0x10a/0x190 [ 66.987170][ T4318] rfkill_set_block+0x1c6/0x420 [ 66.992540][ T4318] rfkill_fop_write+0x458/0x560 [ 66.997889][ T4318] vfs_write+0x300/0xd00 [ 67.002628][ T4318] ksys_write+0x14d/0x250 [ 67.007541][ T4318] do_syscall_64+0x4c/0xa0 [ 67.012458][ T4318] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 67.019024][ T4318] [ 67.019024][ T4318] other info that might help us debug this: [ 67.019024][ T4318] [ 67.029233][ T4318] Chain exists of: [ 67.029233][ T4318] (work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex [ 67.029233][ T4318] [ 67.045011][ T4318] Possible unsafe locking scenario: [ 67.045011][ T4318] [ 67.052439][ T4318] CPU0 CPU1 [ 67.057781][ T4318] ---- ---- [ 67.063120][ T4318] lock(rfkill_global_mutex); [ 67.067864][ T4318] lock(&data->open_mutex); [ 67.074947][ T4318] lock(rfkill_global_mutex); [ 67.082205][ T4318] lock((work_completion)(&hdev->bg_scan_update)); [ 67.088765][ T4318] [ 67.088765][ T4318] *** DEADLOCK *** [ 67.088765][ T4318] [ 67.096881][ T4318] 1 lock held by syz.0.17/4318: [ 67.101700][ T4318] #0: ffffffff8d4be228 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x19e/0x560 [ 67.111764][ T4318] [ 67.111764][ T4318] stack backtrace: [ 67.117638][ T4318] CPU: 0 PID: 4318 Comm: syz.0.17 Not tainted 5.15.189-syzkaller #0 [ 67.125594][ T4318] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 67.135636][ T4318] Call Trace: [ 67.138930][ T4318] [ 67.141849][ T4318] dump_stack_lvl+0x168/0x230 [ 67.146600][ T4318] ? load_image+0x3b0/0x3b0 [ 67.151083][ T4318] ? show_regs_print_info+0x20/0x20 [ 67.156264][ T4318] ? print_circular_bug+0x12b/0x1a0 [ 67.161441][ T4318] check_noncircular+0x274/0x310 [ 67.166362][ T4318] ? add_chain_block+0x940/0x940 [ 67.171276][ T4318] ? lockdep_lock+0xdc/0x1e0 [ 67.175846][ T4318] ? __lock_acquire+0x12d9/0x7c60 [ 67.180847][ T4318] ? lockdep_lock+0x1e0/0x1e0 [ 67.185502][ T4318] ? mark_lock+0x94/0x320 [ 67.189812][ T4318] __lock_acquire+0x2c33/0x7c60 [ 67.194662][ T4318] ? verify_lock_unused+0x140/0x140 [ 67.199865][ T4318] ? verify_lock_unused+0x140/0x140 [ 67.205053][ T4318] lock_acquire+0x197/0x3f0 [ 67.209535][ T4318] ? __flush_work+0xc1/0x1b0 [ 67.214191][ T4318] ? __lock_acquire+0x7c60/0x7c60 [ 67.219196][ T4318] ? read_lock_is_recursive+0x10/0x10 [ 67.224554][ T4318] ? start_flush_work+0x776/0x820 [ 67.229644][ T4318] ? _raw_spin_unlock_irqrestore+0xaa/0x100 [ 67.235520][ T4318] ? _raw_spin_unlock+0x40/0x40 [ 67.240369][ T4318] __flush_work+0xdd/0x1b0 [ 67.244764][ T4318] ? __flush_work+0xc1/0x1b0 [ 67.249331][ T4318] ? flush_work+0x20/0x20 [ 67.253643][ T4318] ? try_to_grab_pending+0xf3/0x7e0 [ 67.258817][ T4318] ? lockdep_hardirqs_off+0x70/0x100 [ 67.264083][ T4318] ? mark_lock+0x94/0x320 [ 67.268392][ T4318] ? lockdep_hardirqs_on_prepare+0x3fc/0x760 [ 67.274355][ T4318] ? lock_chain_count+0x20/0x20 [ 67.279186][ T4318] ? mark_lock+0x94/0x320 [ 67.283499][ T4318] ? __cancel_work_timer+0x331/0x520 [ 67.288763][ T4318] __cancel_work_timer+0x3ac/0x520 [ 67.293850][ T4318] ? cancel_work_sync+0x20/0x20 [ 67.298688][ T4318] ? __cancel_work+0x1f4/0x2d0 [ 67.303426][ T4318] ? lockdep_hardirqs_on+0x94/0x140 [ 67.308611][ T4318] ? __cancel_work+0x26f/0x2d0 [ 67.313355][ T4318] ? cancel_work+0x20/0x20 [ 67.317746][ T4318] ? lock_chain_count+0x20/0x20 [ 67.322577][ T4318] hci_request_cancel_all+0xcc/0x300 [ 67.327844][ T4318] hci_dev_do_close+0x4e/0x1030 [ 67.332674][ T4318] ? _raw_spin_unlock_irqrestore+0xaa/0x100 [ 67.338557][ T4318] ? _raw_spin_unlock+0x40/0x40 [ 67.343560][ T4318] hci_rfkill_set_block+0x10a/0x190 [ 67.348743][ T4318] ? rcu_lock_release+0x20/0x20 [ 67.353576][ T4318] rfkill_set_block+0x1c6/0x420 [ 67.358407][ T4318] rfkill_fop_write+0x458/0x560 [ 67.363236][ T4318] ? verify_lock_unused+0x140/0x140 [ 67.368415][ T4318] ? rfkill_fop_read+0x4b0/0x4b0 [ 67.373329][ T4318] ? common_file_perm+0x150/0x1c0 [ 67.378329][ T4318] ? fsnotify_perm+0x5d/0x560 [ 67.382988][ T4318] ? security_file_permission+0x75/0xa0 [ 67.388513][ T4318] ? rfkill_fop_read+0x4b0/0x4b0 [ 67.393429][ T4318] vfs_write+0x300/0xd00 [ 67.397678][ T4318] ? file_end_write+0x250/0x250 [ 67.402509][ T4318] ? __context_tracking_exit+0x4c/0x80 [ 67.407945][ T4318] ? __lock_acquire+0x7c60/0x7c60 [ 67.412951][ T4318] ? __fdget_pos+0x1e2/0x370 [ 67.417524][ T4318] ksys_write+0x14d/0x250 [ 67.421831][ T4318] ? __ia32_sys_read+0x80/0x80 [ 67.426569][ T4318] ? lockdep_hardirqs_on+0x94/0x140 [ 67.431745][ T4318] do_syscall_64+0x4c/0xa0 [ 67.436586][ T4318] ? clear_bhb_loop+0x30/0x80 [ 67.441357][ T4318] ? clear_bhb_loop+0x30/0x80 [ 67.446027][ T4318] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 67.451932][ T4318] RIP: 0033:0x7f87a4067be9 [ 67.456332][ T4318] 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 [ 67.475922][ T4318] RSP: 002b:00007ffc4a3c7158 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 67.484316][ T4318] RAX: ffffffffffffffda RBX: 00007f87a428efa0 RCX: 00007f87a4067be9 [ 67.492282][ T4318] RDX: 0000000000000008 RSI: 0000200000000300 RDI: 0000000000000003 [ 67.500250][ T4318] RBP: 00007f87a40eae19 R08: 0000000000000000 R09: 0000000000000000 [ 67.508217][ T4318] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 67.516177][ T4318] R13: 00007f87a428efa0 R14: 00007f87a428efa0 R15: 0000000000000003 [ 67.524133][ T4318]