Warning: Permanently added '10.128.1.6' (ED25519) to the list of known hosts. 2026/09/15 09:15:26 parsed 1 programs 2026/09/15 09:15:26 serving rpc on tcp://45079 syzkaller login: [ 65.573044][ T4197] cgroup: Unknown subsys name 'net' [ 65.721364][ T4197] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 66.982224][ T4197] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 69.530024][ T154] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 69.541957][ T154] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 69.552115][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 69.575308][ T4247] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 69.583208][ T4247] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 69.591345][ T728] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 70.488433][ T4288] chnl_net:caif_netlink_parms(): no params data found [ 70.526667][ T4288] bridge0: port 1(bridge_slave_0) entered blocking state [ 70.534466][ T4288] bridge0: port 1(bridge_slave_0) entered disabled state [ 70.542578][ T4288] device bridge_slave_0 entered promiscuous mode [ 70.551420][ T4288] bridge0: port 2(bridge_slave_1) entered blocking state [ 70.558566][ T4288] bridge0: port 2(bridge_slave_1) entered disabled state [ 70.566453][ T4288] device bridge_slave_1 entered promiscuous mode [ 70.584883][ T4288] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 70.595837][ T4288] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 70.615377][ T4288] team0: Port device team_slave_0 added [ 70.623260][ T4288] team0: Port device team_slave_1 added [ 70.638838][ T4288] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 70.645791][ T4288] 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. [ 70.672124][ T4288] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 70.685236][ T4288] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 70.692328][ T4288] 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. [ 70.718936][ T4288] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 70.746354][ T4288] device hsr_slave_0 entered promiscuous mode [ 70.753230][ T4288] device hsr_slave_1 entered promiscuous mode [ 70.847138][ T4288] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 70.857360][ T4288] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 70.866151][ T4288] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 70.876666][ T4288] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 70.962484][ T4288] 8021q: adding VLAN 0 to HW filter on device bond0 [ 70.974998][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 70.985368][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 70.994202][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 71.007411][ T4288] 8021q: adding VLAN 0 to HW filter on device team0 [ 71.034446][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 71.043773][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 71.053230][ T4247] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.060495][ T4247] bridge0: port 1(bridge_slave_0) entered forwarding state [ 71.069990][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 71.084464][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 71.093297][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 71.102305][ T144] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.109405][ T144] bridge0: port 2(bridge_slave_1) entered forwarding state [ 71.138329][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 71.149015][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 71.160886][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 71.172397][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 71.184254][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 71.197636][ T4288] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 71.299134][ T1431] ieee802154 phy0 wpan0: encryption failed: -22 [ 71.305651][ T1431] ieee802154 phy1 wpan1: encryption failed: -22 [ 71.323335][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 71.330970][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 71.356822][ T4288] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 71.374204][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 71.410275][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 71.418829][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 71.426939][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 71.435839][ T4288] device veth0_vlan entered promiscuous mode [ 71.462292][ T4288] device veth1_vlan entered promiscuous mode [ 71.481440][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 71.489898][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 71.499139][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 71.510161][ T4288] device veth0_macvtap entered promiscuous mode [ 71.545426][ T4288] device veth1_macvtap entered promiscuous mode [ 71.562466][ T4288] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 71.571124][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 71.580812][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 71.599850][ T4288] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 71.608844][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 71.619409][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 71.629815][ T4288] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.639299][ T4288] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.648180][ T4288] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.656918][ T4288] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 2026/09/15 09:15:34 executed programs: 0 [ 72.432697][ T4307] chnl_net:caif_netlink_parms(): no params data found [ 72.486081][ T4307] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.493225][ T4307] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.501935][ T4307] device bridge_slave_0 entered promiscuous mode [ 72.514082][ T4307] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.521667][ T4307] bridge0: port 2(bridge_slave_1) entered disabled state [ 72.529861][ T4307] device bridge_slave_1 entered promiscuous mode [ 72.552487][ T4307] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 72.565316][ T4307] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 72.602082][ T4307] team0: Port device team_slave_0 added [ 72.609769][ T4307] team0: Port device team_slave_1 added [ 72.632302][ T4307] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 72.641551][ T4307] 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. [ 72.670280][ T4307] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 72.682576][ T4307] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 72.689599][ T4307] 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. [ 72.715707][ T4307] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 72.758434][ T4307] device hsr_slave_0 entered promiscuous mode [ 72.765241][ T4307] device hsr_slave_1 entered promiscuous mode [ 72.772404][ T4307] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 72.781303][ T4307] Cannot create hsr debugfs directory [ 72.860606][ T4307] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 74.326719][ T1111] Bluetooth: hci0: command 0x0409 tx timeout [ 75.942233][ T4307] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 76.406209][ T4281] Bluetooth: hci0: command 0x041b tx timeout [ 77.230769][ T4307] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 77.283390][ T4307] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 77.481313][ T4307] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 77.489975][ T4307] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 77.510357][ T4307] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 77.519406][ T4307] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 77.571464][ T4307] 8021q: adding VLAN 0 to HW filter on device bond0 [ 77.583059][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 77.592722][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 77.610731][ T4307] 8021q: adding VLAN 0 to HW filter on device team0 [ 77.621043][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 77.630138][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 77.638900][ T4247] bridge0: port 1(bridge_slave_0) entered blocking state [ 77.645991][ T4247] bridge0: port 1(bridge_slave_0) entered forwarding state [ 77.654150][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 77.665493][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 77.674402][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 77.682891][ T4247] bridge0: port 2(bridge_slave_1) entered blocking state [ 77.689949][ T4247] bridge0: port 2(bridge_slave_1) entered forwarding state [ 77.701746][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 77.713351][ T9] device hsr_slave_0 left promiscuous mode [ 77.720311][ T9] device hsr_slave_1 left promiscuous mode [ 77.726738][ T9] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 77.734133][ T9] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 77.742869][ T9] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 77.750529][ T9] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 77.758431][ T9] device bridge_slave_1 left promiscuous mode [ 77.764730][ T9] bridge0: port 2(bridge_slave_1) entered disabled state [ 77.782205][ T9] device bridge_slave_0 left promiscuous mode [ 77.788579][ T9] bridge0: port 1(bridge_slave_0) entered disabled state [ 77.804429][ T9] device veth1_macvtap left promiscuous mode [ 77.811239][ T9] device veth0_macvtap left promiscuous mode [ 77.818042][ T9] device veth1_vlan left promiscuous mode [ 77.823927][ T9] device veth0_vlan left promiscuous mode [ 77.943831][ T9] team0 (unregistering): Port device team_slave_1 removed [ 77.955999][ T9] team0 (unregistering): Port device team_slave_0 removed [ 77.969165][ T9] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 77.982540][ T9] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 78.030472][ T9] bond0 (unregistering): Released all slaves [ 78.084391][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 78.097117][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 78.106395][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 78.114776][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 78.124559][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 78.133513][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 78.149654][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 78.158100][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 78.166532][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 78.174784][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 78.187552][ T4307] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 78.261154][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 78.268716][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 78.283812][ T4307] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 78.308009][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 78.316731][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 78.332534][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 78.341061][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 78.350674][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 78.358956][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 78.371110][ T4307] device veth0_vlan entered promiscuous mode [ 78.383204][ T4307] device veth1_vlan entered promiscuous mode [ 78.400667][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 78.410019][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 78.418388][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 78.427823][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 78.438404][ T4307] device veth0_macvtap entered promiscuous mode [ 78.448165][ T4307] device veth1_macvtap entered promiscuous mode [ 78.460984][ T4307] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 78.468818][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 78.477374][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 78.485231][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 78.494292][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 78.502710][ T4294] Bluetooth: hci0: command 0x040f tx timeout [ 78.508705][ T4307] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 78.517385][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 78.526487][ T4247] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 78.537820][ T4307] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 78.547908][ T4307] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 78.556988][ T4307] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 78.565696][ T4307] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 78.626555][ T4247] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 78.634402][ T4247] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 78.652563][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 78.670469][ T154] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 78.679637][ T154] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 78.687478][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 78.771604][ T4320] [ 78.773963][ T4320] ====================================================== [ 78.780977][ T4320] WARNING: possible circular locking dependency detected [ 78.788003][ T4320] syzkaller #0 Not tainted [ 78.792420][ T4320] ------------------------------------------------------ [ 78.799425][ T4320] syz.0.17/4320 is trying to acquire lock: [ 78.805219][ T4320] ffff888022615028 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xfa/0x210 [ 78.816291][ T4320] [ 78.816291][ T4320] but task is already holding lock: [ 78.823651][ T4320] ffffffff8d6d6b68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x1ae/0x560 [ 78.833318][ T4320] [ 78.833318][ T4320] which lock already depends on the new lock. [ 78.833318][ T4320] [ 78.843734][ T4320] [ 78.843734][ T4320] the existing dependency chain (in reverse order) is: [ 78.852753][ T4320] [ 78.852753][ T4320] -> #4 (rfkill_global_mutex){+.+.}-{3:3}: [ 78.860748][ T4320] __mutex_lock_common+0x1e5/0x2400 [ 78.866478][ T4320] mutex_lock_nested+0x17/0x20 [ 78.871896][ T4320] rfkill_register+0x2f/0x970 [ 78.877104][ T4320] hci_register_dev+0x459/0x980 [ 78.882482][ T4320] vhci_create_device+0x32e/0x5c0 [ 78.888047][ T4320] vhci_write+0x389/0x440 [ 78.892900][ T4320] vfs_write+0x748/0xd70 [ 78.897664][ T4320] ksys_write+0x153/0x260 [ 78.902600][ T4320] do_syscall_64+0x4c/0xa0 [ 78.907544][ T4320] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 78.913955][ T4320] [ 78.913955][ T4320] -> #3 (&data->open_mutex){+.+.}-{3:3}: [ 78.921773][ T4320] __mutex_lock_common+0x1e5/0x2400 [ 78.927493][ T4320] mutex_lock_nested+0x17/0x20 [ 78.932780][ T4320] vhci_send_frame+0x88/0x100 [ 78.937975][ T4320] hci_send_frame+0x1a9/0x2e0 [ 78.943172][ T4320] hci_tx_work+0x9b5/0x16d0 [ 78.948193][ T4320] process_one_work+0x867/0xff0 [ 78.953562][ T4320] worker_thread+0xad7/0x12a0 [ 78.958756][ T4320] kthread+0x42e/0x520 [ 78.963355][ T4320] ret_from_fork+0x1f/0x30 [ 78.968298][ T4320] [ 78.968298][ T4320] -> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}: [ 78.977510][ T4320] __flush_work+0x116/0x210 [ 78.982555][ T4320] hci_dev_do_close+0x201/0x1020 [ 78.988022][ T4320] hci_unregister_dev+0x2eb/0x590 [ 78.993585][ T4320] vhci_release+0x73/0xc0 [ 78.998444][ T4320] __fput+0x212/0x8c0 [ 79.002953][ T4320] task_work_run+0x125/0x1a0 [ 79.008067][ T4320] do_exit+0x635/0x2110 [ 79.012741][ T4320] do_group_exit+0x12c/0x2f0 [ 79.017841][ T4320] get_signal+0x7eb/0x12e0 [ 79.022756][ T4320] arch_do_signal_or_restart+0xe6/0x12a0 [ 79.028889][ T4320] exit_to_user_mode_loop+0x9e/0x130 [ 79.034675][ T4320] exit_to_user_mode_prepare+0xee/0x180 [ 79.040719][ T4320] syscall_exit_to_user_mode+0x16/0x40 [ 79.046676][ T4320] do_syscall_64+0x58/0xa0 [ 79.051710][ T4320] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 79.058206][ T4320] [ 79.058206][ T4320] -> #1 (&hdev->req_lock){+.+.}-{3:3}: [ 79.065833][ T4320] __mutex_lock_common+0x1e5/0x2400 [ 79.071546][ T4320] mutex_lock_nested+0x17/0x20 [ 79.076813][ T4320] bg_scan_update+0x44/0x3b0 [ 79.082005][ T4320] process_one_work+0x867/0xff0 [ 79.087364][ T4320] worker_thread+0xad7/0x12a0 [ 79.092540][ T4320] kthread+0x42e/0x520 [ 79.097106][ T4320] ret_from_fork+0x1f/0x30 [ 79.102021][ T4320] [ 79.102021][ T4320] -> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}: [ 79.111807][ T4320] __lock_acquire+0x2c66/0x7b50 [ 79.117164][ T4320] lock_acquire+0x19e/0x400 [ 79.122175][ T4320] __flush_work+0x116/0x210 [ 79.127176][ T4320] __cancel_work_timer+0x3f4/0x560 [ 79.132785][ T4320] hci_request_cancel_all+0xcc/0x300 [ 79.138573][ T4320] hci_dev_do_close+0x4e/0x1020 [ 79.143925][ T4320] hci_rfkill_set_block+0x101/0x180 [ 79.149628][ T4320] rfkill_set_block+0x1c1/0x3c0 [ 79.154977][ T4320] rfkill_fop_write+0x453/0x560 [ 79.160332][ T4320] vfs_write+0x304/0xd70 [ 79.165077][ T4320] ksys_write+0x153/0x260 [ 79.169907][ T4320] do_syscall_64+0x4c/0xa0 [ 79.174822][ T4320] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 79.181218][ T4320] [ 79.181218][ T4320] other info that might help us debug this: [ 79.181218][ T4320] [ 79.191421][ T4320] Chain exists of: [ 79.191421][ T4320] (work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex [ 79.191421][ T4320] [ 79.207117][ T4320] Possible unsafe locking scenario: [ 79.207117][ T4320] [ 79.214544][ T4320] CPU0 CPU1 [ 79.219883][ T4320] ---- ---- [ 79.225241][ T4320] lock(rfkill_global_mutex); [ 79.229982][ T4320] lock(&data->open_mutex); [ 79.237076][ T4320] lock(rfkill_global_mutex); [ 79.244349][ T4320] lock((work_completion)(&hdev->bg_scan_update)); [ 79.250919][ T4320] [ 79.250919][ T4320] *** DEADLOCK *** [ 79.250919][ T4320] [ 79.259051][ T4320] 1 lock held by syz.0.17/4320: [ 79.263884][ T4320] #0: ffffffff8d6d6b68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x1ae/0x560 [ 79.273960][ T4320] [ 79.273960][ T4320] stack backtrace: [ 79.279841][ T4320] CPU: 0 PID: 4320 Comm: syz.0.17 Not tainted syzkaller #0 [ 79.287015][ T4320] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 79.297060][ T4320] Call Trace: [ 79.300326][ T4320] [ 79.303240][ T4320] dump_stack_lvl+0x188/0x250 [ 79.307915][ T4320] ? load_image+0x410/0x410 [ 79.312402][ T4320] ? show_regs_print_info+0x20/0x20 [ 79.317597][ T4320] ? print_circular_bug+0x12b/0x1a0 [ 79.322777][ T4320] check_noncircular+0x296/0x330 [ 79.327702][ T4320] ? look_up_lock_class+0x71/0x110 [ 79.332795][ T4320] ? add_chain_block+0x9b0/0x9b0 [ 79.337710][ T4320] ? lockdep_lock+0xf1/0x1f0 [ 79.342280][ T4320] ? __lock_acquire+0x1305/0x7b50 [ 79.347283][ T4320] ? mark_lock+0x94/0x320 [ 79.352638][ T4320] ? _find_first_zero_bit+0xd1/0xf0 [ 79.357844][ T4320] __lock_acquire+0x2c66/0x7b50 [ 79.362714][ T4320] ? verify_lock_unused+0x140/0x140 [ 79.368027][ T4320] ? verify_lock_unused+0x140/0x140 [ 79.373259][ T4320] lock_acquire+0x19e/0x400 [ 79.377757][ T4320] ? __flush_work+0xfa/0x210 [ 79.382333][ T4320] ? __lock_acquire+0x7b50/0x7b50 [ 79.387343][ T4320] ? read_lock_is_recursive+0x10/0x10 [ 79.392695][ T4320] ? start_flush_work+0x784/0x830 [ 79.397725][ T4320] __flush_work+0x116/0x210 [ 79.402210][ T4320] ? __flush_work+0xfa/0x210 [ 79.406775][ T4320] ? flush_work+0x20/0x20 [ 79.411085][ T4320] ? try_to_grab_pending+0xfb/0x820 [ 79.416262][ T4320] ? mark_lock+0x94/0x320 [ 79.420580][ T4320] ? lockdep_hardirqs_on_prepare+0x448/0x7c0 [ 79.426552][ T4320] ? lock_chain_count+0x20/0x20 [ 79.431385][ T4320] ? mark_lock+0x94/0x320 [ 79.435696][ T4320] ? __cancel_work_timer+0x36a/0x560 [ 79.440961][ T4320] __cancel_work_timer+0x3f4/0x560 [ 79.446057][ T4320] ? cancel_work_sync+0x20/0x20 [ 79.450887][ T4320] ? __cancel_work+0x1f9/0x2e0 [ 79.455627][ T4320] ? lockdep_hardirqs_on+0x94/0x140 [ 79.460806][ T4320] ? __cancel_work+0x27b/0x2e0 [ 79.465552][ T4320] ? cancel_work+0x20/0x20 [ 79.469951][ T4320] hci_request_cancel_all+0xcc/0x300 [ 79.475223][ T4320] hci_dev_do_close+0x4e/0x1020 [ 79.480062][ T4320] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 79.485941][ T4320] ? _raw_spin_unlock+0x40/0x40 [ 79.490898][ T4320] hci_rfkill_set_block+0x101/0x180 [ 79.496133][ T4320] ? rcu_lock_release+0x20/0x20 [ 79.500983][ T4320] rfkill_set_block+0x1c1/0x3c0 [ 79.505820][ T4320] rfkill_fop_write+0x453/0x560 [ 79.510650][ T4320] ? rfkill_fop_read+0x560/0x560 [ 79.515583][ T4320] ? common_file_perm+0x160/0x1c0 [ 79.520587][ T4320] ? fsnotify_perm+0x5d/0x560 [ 79.525243][ T4320] ? security_file_permission+0x75/0xa0 [ 79.530764][ T4320] ? rfkill_fop_read+0x560/0x560 [ 79.535678][ T4320] vfs_write+0x304/0xd70 [ 79.539913][ T4320] ? file_end_write+0x250/0x250 [ 79.544744][ T4320] ? __context_tracking_exit+0x4c/0x80 [ 79.550186][ T4320] ? __fdget_pos+0x1e2/0x370 [ 79.554759][ T4320] ksys_write+0x153/0x260 [ 79.559067][ T4320] ? __ia32_sys_read+0x80/0x80 [ 79.563808][ T4320] ? lockdep_hardirqs_on+0x94/0x140 [ 79.568988][ T4320] do_syscall_64+0x4c/0xa0 [ 79.573385][ T4320] ? clear_bhb_loop+0x30/0x80 [ 79.578043][ T4320] ? clear_bhb_loop+0x30/0x80 [ 79.582699][ T4320] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 79.588674][ T4320] RIP: 0033:0x7faf6b3e8159 [ 79.593069][ T4320] 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 [ 79.612652][ T4320] RSP: 002b:00007fff8a78e8f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 79.621057][ T4320] RAX: ffffffffffffffda RBX: 00007faf6b66ffa0 RCX: 00007faf6b3e8159 [ 79.629093][ T4320] RDX: 0000000000000008 RSI: 0000200000000040 RDI: 0000000000000003 [ 79.637040][ T4320] RBP: 00007faf6b47f03b R08: 0000000000000000 R09: 0000000000000000 [ 79.644986][ T4320] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 79.652936][ T4320] R13: 00007faf6b66ffac R14: 00007faf6b66ffa0 R15: 00007faf6b66ffa0 [ 79.660896][ T4320]