no interfaces have a carrier [ 40.740933][ T3852] 8021q: adding VLAN 0 to HW filter on device bond0 [ 40.760297][ T3852] eql: remember to turn off Van-Jacobson compression on your slave devices Starting crond: OK Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.254' (ED25519) to the list of known hosts. 2026/01/08 21:45:33 parsed 1 programs syzkaller login: [ 66.586293][ T4187] cgroup: Unknown subsys name 'net' [ 66.718249][ T4187] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 68.255150][ T4187] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 71.416267][ T1421] ieee802154 phy0 wpan0: encryption failed: -22 [ 71.422915][ T1421] ieee802154 phy1 wpan1: encryption failed: -22 [ 71.477065][ T144] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 71.491092][ T144] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 71.509479][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 71.528340][ T155] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 71.537752][ T155] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 71.548147][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 72.239410][ T4267] chnl_net:caif_netlink_parms(): no params data found [ 72.290246][ T4267] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.298716][ T4267] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.307306][ T4267] device bridge_slave_0 entered promiscuous mode [ 72.316726][ T4267] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.324021][ T4267] bridge0: port 2(bridge_slave_1) entered disabled state [ 72.332351][ T4267] device bridge_slave_1 entered promiscuous mode [ 72.375738][ T4267] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 72.387193][ T4267] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 72.412110][ T4267] team0: Port device team_slave_0 added [ 72.420406][ T4267] team0: Port device team_slave_1 added [ 72.462003][ T4267] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 72.468986][ T4267] 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. [ 72.495056][ T4267] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 72.509653][ T4267] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 72.517893][ T4267] 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. [ 72.544602][ T4267] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 72.596844][ T4267] device hsr_slave_0 entered promiscuous mode [ 72.603963][ T4267] device hsr_slave_1 entered promiscuous mode [ 72.741668][ T4267] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 72.754822][ T4267] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 72.765424][ T4267] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 72.795752][ T4267] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 72.882221][ T4267] 8021q: adding VLAN 0 to HW filter on device bond0 [ 72.896091][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 72.905352][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 72.918140][ T4267] 8021q: adding VLAN 0 to HW filter on device team0 [ 72.944504][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 72.954148][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 72.963504][ T154] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.970719][ T154] bridge0: port 1(bridge_slave_0) entered forwarding state [ 72.979455][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 72.993302][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 73.002060][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 73.010494][ T154] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.017618][ T154] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.028377][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 73.058348][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 73.071050][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 73.080690][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 73.089673][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 73.104800][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 73.113806][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 73.144031][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 73.155836][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 73.167732][ T4267] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 73.300059][ T1239] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 73.308384][ T1239] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 73.322608][ T4267] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 73.356505][ T1239] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 73.379711][ T1239] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 73.391122][ T1239] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 73.401725][ T1239] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 73.412282][ T4267] device veth0_vlan entered promiscuous mode [ 73.426327][ T4267] device veth1_vlan entered promiscuous mode [ 73.452455][ T1239] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 73.463786][ T1239] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 73.472300][ T1239] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 73.483712][ T4267] device veth0_macvtap entered promiscuous mode [ 73.495993][ T4267] device veth1_macvtap entered promiscuous mode [ 73.517311][ T4267] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 73.527995][ T1239] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 73.538268][ T1239] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 73.549366][ T1239] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 73.562009][ T4267] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 73.570197][ T1239] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 73.581048][ T1239] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 73.592772][ T4267] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.602976][ T4267] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.612449][ T4267] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.621259][ T4267] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.737058][ T4267] syz-executor (4267) used greatest stack depth: 19968 bytes left 2026/01/08 21:45:43 executed programs: 0 [ 74.469650][ T4296] chnl_net:caif_netlink_parms(): no params data found [ 74.536899][ T4296] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.544149][ T4296] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.555342][ T4296] device bridge_slave_0 entered promiscuous mode [ 74.567461][ T4296] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.575804][ T4296] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.584200][ T4296] device bridge_slave_1 entered promiscuous mode [ 74.610701][ T4296] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 74.626671][ T4296] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 74.657793][ T4296] team0: Port device team_slave_0 added [ 74.666962][ T4296] team0: Port device team_slave_1 added [ 74.698555][ T4296] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 74.705671][ T4296] 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. [ 74.735294][ T4296] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 74.752779][ T4296] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 74.759872][ T4296] 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. [ 74.786393][ T4296] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 74.823375][ T4296] device hsr_slave_0 entered promiscuous mode [ 74.830685][ T4296] device hsr_slave_1 entered promiscuous mode [ 74.837326][ T4296] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 74.845538][ T4296] Cannot create hsr debugfs directory [ 74.939065][ T4296] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 76.372198][ T7] Bluetooth: hci0: command 0x0409 tx timeout [ 78.060247][ T4296] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 78.451684][ T7] Bluetooth: hci0: command 0x041b tx timeout [ 79.107905][ T4296] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 79.178668][ T4296] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 79.380774][ T4296] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 79.391788][ T4296] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 79.401049][ T4296] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 79.412178][ T4296] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 79.500470][ T4296] 8021q: adding VLAN 0 to HW filter on device bond0 [ 79.514374][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 79.523591][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 79.546244][ T4296] 8021q: adding VLAN 0 to HW filter on device team0 [ 79.556636][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 79.565686][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 79.576262][ T154] bridge0: port 1(bridge_slave_0) entered blocking state [ 79.583424][ T154] bridge0: port 1(bridge_slave_0) entered forwarding state [ 79.594925][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 79.603714][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 79.613616][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 79.622577][ T154] bridge0: port 2(bridge_slave_1) entered blocking state [ 79.629731][ T154] bridge0: port 2(bridge_slave_1) entered forwarding state [ 79.646250][ T9] device hsr_slave_0 left promiscuous mode [ 79.652925][ T9] device hsr_slave_1 left promiscuous mode [ 79.659959][ T9] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 79.669397][ T9] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 79.678053][ T9] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 79.685672][ T9] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 79.693497][ T9] device bridge_slave_1 left promiscuous mode [ 79.699812][ T9] bridge0: port 2(bridge_slave_1) entered disabled state [ 79.715494][ T9] device bridge_slave_0 left promiscuous mode [ 79.721910][ T9] bridge0: port 1(bridge_slave_0) entered disabled state [ 79.739757][ T9] device veth1_macvtap left promiscuous mode [ 79.747017][ T9] device veth0_macvtap left promiscuous mode [ 79.753687][ T9] device veth1_vlan left promiscuous mode [ 79.759612][ T9] device veth0_vlan left promiscuous mode [ 79.919110][ T9] team0 (unregistering): Port device team_slave_1 removed [ 79.932909][ T9] team0 (unregistering): Port device team_slave_0 removed [ 79.949012][ T9] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 79.963779][ T9] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 80.026046][ T9] bond0 (unregistering): Released all slaves [ 80.072484][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 80.085782][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 80.097771][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 80.107564][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 80.116306][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 80.128676][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 80.138190][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 80.158844][ T4296] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 80.170783][ T4296] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 80.186613][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 80.204342][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 80.218164][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 80.226949][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 80.238592][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 80.315552][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 80.323891][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 80.335950][ T4296] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 80.363229][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 80.374494][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 80.391919][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 80.400237][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 80.409082][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 80.417495][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 80.427382][ T4296] device veth0_vlan entered promiscuous mode [ 80.440824][ T4296] device veth1_vlan entered promiscuous mode [ 80.460590][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 80.469579][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 80.477947][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 80.486575][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 80.499365][ T4296] device veth0_macvtap entered promiscuous mode [ 80.514078][ T4296] device veth1_macvtap entered promiscuous mode [ 80.522750][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 80.530857][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 80.539238][ T1325] Bluetooth: hci0: command 0x040f tx timeout [ 80.557517][ T4296] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 80.566970][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 80.577320][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 80.590260][ T4296] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 80.598382][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 80.609614][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 80.630034][ T4296] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 80.639247][ T4296] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 80.648403][ T4296] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 80.658614][ T4296] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 80.717588][ T155] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 80.730192][ T155] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 80.748259][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 80.766163][ T154] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 80.775503][ T154] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 80.786485][ T1239] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 80.835824][ T4314] [ 80.838219][ T4314] ====================================================== [ 80.845261][ T4314] WARNING: possible circular locking dependency detected [ 80.852327][ T4314] syzkaller #0 Not tainted [ 80.856773][ T4314] ------------------------------------------------------ [ 80.863817][ T4314] syz.0.17/4314 is trying to acquire lock: [ 80.869645][ T4314] ffff88801f54cc28 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xc1/0x1b0 [ 80.880861][ T4314] [ 80.880861][ T4314] but task is already holding lock: [ 80.888259][ T4314] ffffffff8d4ba7e8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x19e/0x560 [ 80.898091][ T4314] [ 80.898091][ T4314] which lock already depends on the new lock. [ 80.898091][ T4314] [ 80.908519][ T4314] [ 80.908519][ T4314] the existing dependency chain (in reverse order) is: [ 80.917567][ T4314] [ 80.917567][ T4314] -> #4 (rfkill_global_mutex){+.+.}-{3:3}: [ 80.925740][ T4314] __mutex_lock_common+0x1eb/0x2390 [ 80.931509][ T4314] mutex_lock_nested+0x17/0x20 [ 80.936823][ T4314] rfkill_register+0x33/0x8a0 [ 80.942052][ T4314] hci_register_dev+0x452/0x970 [ 80.947443][ T4314] vhci_create_device+0x32c/0x5c0 [ 80.953014][ T4314] vhci_write+0x391/0x450 [ 80.957891][ T4314] vfs_write+0x712/0xd00 [ 80.962671][ T4314] ksys_write+0x14d/0x250 [ 80.967546][ T4314] do_syscall_64+0x4c/0xa0 [ 80.972505][ T4314] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 80.978956][ T4314] [ 80.978956][ T4314] -> #3 (&data->open_mutex){+.+.}-{3:3}: [ 80.986822][ T4314] __mutex_lock_common+0x1eb/0x2390 [ 80.992634][ T4314] mutex_lock_nested+0x17/0x20 [ 80.997944][ T4314] vhci_send_frame+0x88/0x100 [ 81.003166][ T4314] hci_send_frame+0x1a9/0x2e0 [ 81.008387][ T4314] hci_tx_work+0x9f9/0x1710 [ 81.013456][ T4314] process_one_work+0x863/0x1000 [ 81.018962][ T4314] worker_thread+0xaa8/0x12a0 [ 81.024191][ T4314] kthread+0x436/0x520 [ 81.028807][ T4314] ret_from_fork+0x1f/0x30 [ 81.033769][ T4314] [ 81.033769][ T4314] -> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}: [ 81.043012][ T4314] __flush_work+0xdd/0x1b0 [ 81.047991][ T4314] hci_dev_do_close+0x1e7/0x1030 [ 81.053498][ T4314] hci_unregister_dev+0x2d7/0x580 [ 81.059067][ T4314] vhci_release+0x73/0xc0 [ 81.063956][ T4314] __fput+0x234/0x930 [ 81.068491][ T4314] task_work_run+0x125/0x1a0 [ 81.073628][ T4314] do_exit+0x61e/0x20a0 [ 81.078337][ T4314] do_group_exit+0x12e/0x300 [ 81.083496][ T4314] get_signal+0x6ca/0x12c0 [ 81.088458][ T4314] arch_do_signal_or_restart+0xc1/0x1300 [ 81.094644][ T4314] exit_to_user_mode_loop+0x9e/0x130 [ 81.100496][ T4314] exit_to_user_mode_prepare+0xee/0x180 [ 81.106613][ T4314] syscall_exit_to_user_mode+0x16/0x40 [ 81.112625][ T4314] do_syscall_64+0x58/0xa0 [ 81.117601][ T4314] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 81.124045][ T4314] [ 81.124045][ T4314] -> #1 (&hdev->req_lock){+.+.}-{3:3}: [ 81.131725][ T4314] __mutex_lock_common+0x1eb/0x2390 [ 81.137499][ T4314] mutex_lock_nested+0x17/0x20 [ 81.142819][ T4314] bg_scan_update+0x44/0x3b0 [ 81.147958][ T4314] process_one_work+0x863/0x1000 [ 81.153449][ T4314] worker_thread+0xaa8/0x12a0 [ 81.158674][ T4314] kthread+0x436/0x520 [ 81.163282][ T4314] ret_from_fork+0x1f/0x30 [ 81.168240][ T4314] [ 81.168240][ T4314] -> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}: [ 81.178088][ T4314] __lock_acquire+0x2c33/0x7c60 [ 81.183497][ T4314] lock_acquire+0x197/0x3f0 [ 81.188695][ T4314] __flush_work+0xdd/0x1b0 [ 81.193673][ T4314] __cancel_work_timer+0x3ac/0x520 [ 81.199335][ T4314] hci_request_cancel_all+0xcc/0x300 [ 81.205171][ T4314] hci_dev_do_close+0x4e/0x1030 [ 81.210566][ T4314] hci_rfkill_set_block+0x10a/0x190 [ 81.216308][ T4314] rfkill_set_block+0x1c6/0x420 [ 81.221717][ T4314] rfkill_fop_write+0x458/0x560 [ 81.227117][ T4314] vfs_write+0x300/0xd00 [ 81.231904][ T4314] ksys_write+0x14d/0x250 [ 81.236777][ T4314] do_syscall_64+0x4c/0xa0 [ 81.241742][ T4314] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 81.248184][ T4314] [ 81.248184][ T4314] other info that might help us debug this: [ 81.248184][ T4314] [ 81.258431][ T4314] Chain exists of: [ 81.258431][ T4314] (work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex [ 81.258431][ T4314] [ 81.274198][ T4314] Possible unsafe locking scenario: [ 81.274198][ T4314] [ 81.281665][ T4314] CPU0 CPU1 [ 81.287050][ T4314] ---- ---- [ 81.292428][ T4314] lock(rfkill_global_mutex); [ 81.297216][ T4314] lock(&data->open_mutex); [ 81.304356][ T4314] lock(rfkill_global_mutex); [ 81.311665][ T4314] lock((work_completion)(&hdev->bg_scan_update)); [ 81.318280][ T4314] [ 81.318280][ T4314] *** DEADLOCK *** [ 81.318280][ T4314] [ 81.326440][ T4314] 1 lock held by syz.0.17/4314: [ 81.331300][ T4314] #0: ffffffff8d4ba7e8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x19e/0x560 [ 81.341441][ T4314] [ 81.341441][ T4314] stack backtrace: [ 81.347371][ T4314] CPU: 0 PID: 4314 Comm: syz.0.17 Not tainted syzkaller #0 [ 81.354599][ T4314] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 [ 81.364741][ T4314] Call Trace: [ 81.368045][ T4314] [ 81.371005][ T4314] dump_stack_lvl+0x168/0x230 [ 81.375713][ T4314] ? load_image+0x3b0/0x3b0 [ 81.380246][ T4314] ? show_regs_print_info+0x20/0x20 [ 81.385514][ T4314] ? print_circular_bug+0x12b/0x1a0 [ 81.390743][ T4314] check_noncircular+0x274/0x310 [ 81.395709][ T4314] ? add_chain_block+0x940/0x940 [ 81.400669][ T4314] ? lockdep_lock+0xdc/0x1e0 [ 81.405286][ T4314] ? __lock_acquire+0x12d9/0x7c60 [ 81.410345][ T4314] ? lockdep_lock+0x1e0/0x1e0 [ 81.415053][ T4314] ? mark_lock+0x94/0x320 [ 81.419453][ T4314] __lock_acquire+0x2c33/0x7c60 [ 81.424352][ T4314] ? verify_lock_unused+0x140/0x140 [ 81.429589][ T4314] ? verify_lock_unused+0x140/0x140 [ 81.434830][ T4314] lock_acquire+0x197/0x3f0 [ 81.439360][ T4314] ? __flush_work+0xc1/0x1b0 [ 81.443978][ T4314] ? __lock_acquire+0x7c60/0x7c60 [ 81.449036][ T4314] ? read_lock_is_recursive+0x10/0x10 [ 81.454437][ T4314] ? start_flush_work+0x776/0x820 [ 81.459491][ T4314] ? _raw_spin_unlock_irqrestore+0xaa/0x100 [ 81.465411][ T4314] ? _raw_spin_unlock+0x40/0x40 [ 81.470289][ T4314] __flush_work+0xdd/0x1b0 [ 81.474734][ T4314] ? __flush_work+0xc1/0x1b0 [ 81.479352][ T4314] ? flush_work+0x20/0x20 [ 81.483713][ T4314] ? try_to_grab_pending+0xf3/0x7e0 [ 81.489109][ T4314] ? lockdep_hardirqs_off+0x70/0x100 [ 81.494470][ T4314] ? mark_lock+0x94/0x320 [ 81.498836][ T4314] ? lockdep_hardirqs_on_prepare+0x3fc/0x760 [ 81.504842][ T4314] ? lock_chain_count+0x20/0x20 [ 81.509722][ T4314] ? mark_lock+0x94/0x320 [ 81.514091][ T4314] ? __cancel_work_timer+0x331/0x520 [ 81.519531][ T4314] __cancel_work_timer+0x3ac/0x520 [ 81.524670][ T4314] ? cancel_work_sync+0x20/0x20 [ 81.529541][ T4314] ? __cancel_work+0x1f4/0x2d0 [ 81.534334][ T4314] ? lockdep_hardirqs_on+0x94/0x140 [ 81.539566][ T4314] ? __cancel_work+0x26f/0x2d0 [ 81.544355][ T4314] ? cancel_work+0x20/0x20 [ 81.548797][ T4314] ? lock_chain_count+0x20/0x20 [ 81.553676][ T4314] hci_request_cancel_all+0xcc/0x300 [ 81.558991][ T4314] hci_dev_do_close+0x4e/0x1030 [ 81.563870][ T4314] ? _raw_spin_unlock_irqrestore+0xaa/0x100 [ 81.569791][ T4314] ? _raw_spin_unlock+0x40/0x40 [ 81.574668][ T4314] hci_rfkill_set_block+0x10a/0x190 [ 81.579898][ T4314] ? rcu_lock_release+0x20/0x20 [ 81.584772][ T4314] rfkill_set_block+0x1c6/0x420 [ 81.589650][ T4314] rfkill_fop_write+0x458/0x560 [ 81.594519][ T4314] ? verify_lock_unused+0x140/0x140 [ 81.599744][ T4314] ? rfkill_fop_read+0x4b0/0x4b0 [ 81.604699][ T4314] ? common_file_perm+0xc0/0x1c0 [ 81.609658][ T4314] ? fsnotify_perm+0x5d/0x560 [ 81.614358][ T4314] ? security_file_permission+0x75/0xa0 [ 81.619932][ T4314] ? rfkill_fop_read+0x4b0/0x4b0 [ 81.624897][ T4314] vfs_write+0x300/0xd00 [ 81.629166][ T4314] ? file_end_write+0x250/0x250 [ 81.634060][ T4314] ? __context_tracking_exit+0x4c/0x80 [ 81.639564][ T4314] ? __lock_acquire+0x7c60/0x7c60 [ 81.644622][ T4314] ? __fdget_pos+0x1e2/0x370 [ 81.649234][ T4314] ksys_write+0x14d/0x250 [ 81.653587][ T4314] ? __ia32_sys_read+0x80/0x80 [ 81.658388][ T4314] ? lockdep_hardirqs_on+0x94/0x140 [ 81.663618][ T4314] do_syscall_64+0x4c/0xa0 [ 81.668061][ T4314] ? clear_bhb_loop+0x30/0x80 [ 81.672765][ T4314] ? clear_bhb_loop+0x30/0x80 [ 81.677467][ T4314] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 81.683438][ T4314] RIP: 0033:0x7fded6b6d749 [ 81.687877][ T4314] 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 [ 81.707525][ T4314] RSP: 002b:00007ffeb1986bd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 81.715961][ T4314] RAX: ffffffffffffffda RBX: 00007fded6dc3fa0 RCX: 00007fded6b6d749 [ 81.723952][ T4314] RDX: 0000000000000008 RSI: 0000200000000180 RDI: 0000000000000003 [ 81.732028][ T4314] RBP: 00007fded6bf1f91 R08: 0000000000000000 R09: 0000000000000000 [ 81.740019][ T4314] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 81.748097][ T4314] R13: 00007fded6dc3fa0 R14: 00007fded6dc3fa0 R15: 0000000000000003 [ 81.756093][ T4314]