Warning: Permanently added '10.128.0.144' (ED25519) to the list of known hosts. 2026/01/15 20:04:35 parsed 1 programs syzkaller login: [ 53.219980][ T4187] cgroup: Unknown subsys name 'net' [ 53.387567][ T4187] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 54.614959][ T4187] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 56.833794][ T1222] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 56.841723][ T1222] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 56.856963][ T154] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 56.859305][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 56.872289][ T154] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 56.880675][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 57.820887][ T4254] chnl_net:caif_netlink_parms(): no params data found [ 57.921090][ T4254] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.933025][ T4254] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.940683][ T4254] device bridge_slave_0 entered promiscuous mode [ 57.949448][ T4254] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.956570][ T4254] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.964548][ T4254] device bridge_slave_1 entered promiscuous mode [ 57.985082][ T4254] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.996139][ T4254] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.016685][ T4254] team0: Port device team_slave_0 added [ 58.023738][ T4254] team0: Port device team_slave_1 added [ 58.039118][ T4254] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 58.046211][ T4254] 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. [ 58.072175][ T4254] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 58.084476][ T4254] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 58.091423][ T4254] 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. [ 58.117861][ T4254] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 58.144493][ T4254] device hsr_slave_0 entered promiscuous mode [ 58.152086][ T4254] device hsr_slave_1 entered promiscuous mode [ 58.227841][ T4254] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 58.238870][ T4254] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 58.248133][ T4254] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 58.257383][ T4254] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 58.279441][ T4254] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.286627][ T4254] bridge0: port 2(bridge_slave_1) entered forwarding state [ 58.294688][ T4254] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.301755][ T4254] bridge0: port 1(bridge_slave_0) entered forwarding state [ 58.340944][ T4254] 8021q: adding VLAN 0 to HW filter on device bond0 [ 58.353722][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 58.363871][ T9] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.372364][ T9] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.380202][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 58.392594][ T4254] 8021q: adding VLAN 0 to HW filter on device team0 [ 58.404250][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 58.412774][ T9] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.419832][ T9] bridge0: port 1(bridge_slave_0) entered forwarding state [ 58.437738][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 58.446317][ T9] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.453423][ T9] bridge0: port 2(bridge_slave_1) entered forwarding state [ 58.490942][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 58.500353][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 58.511324][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 58.550372][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 58.561600][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 58.573224][ T4254] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 58.659534][ T4233] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 58.667578][ T4233] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 58.699854][ T4254] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 58.716211][ T4233] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 58.732147][ T4233] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 58.741011][ T4233] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 58.749420][ T4233] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 58.761769][ T4254] device veth0_vlan entered promiscuous mode [ 58.788185][ T4254] device veth1_vlan entered promiscuous mode [ 58.804437][ T4233] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 58.813975][ T4233] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 58.821961][ T4233] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 58.833525][ T4254] device veth0_macvtap entered promiscuous mode [ 58.862082][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 58.871208][ T4254] device veth1_macvtap entered promiscuous mode [ 58.886633][ T4254] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 58.897801][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 58.907158][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 58.919775][ T4254] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 58.928151][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 58.936989][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 58.947869][ T4254] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 58.957136][ T4254] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 58.965994][ T4254] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 58.974736][ T4254] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 2026/01/15 20:04:43 executed programs: 0 [ 59.558145][ T4303] chnl_net:caif_netlink_parms(): no params data found [ 59.624830][ T4303] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.631967][ T4303] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.640371][ T4303] device bridge_slave_0 entered promiscuous mode [ 59.651110][ T4303] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.659883][ T4303] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.670376][ T4303] device bridge_slave_1 entered promiscuous mode [ 59.701797][ T4303] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.715529][ T4303] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.747748][ T4303] team0: Port device team_slave_0 added [ 59.756824][ T4303] team0: Port device team_slave_1 added [ 59.784023][ T4303] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 59.790982][ T4303] 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. [ 59.820277][ T4303] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 59.835628][ T4303] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 59.843751][ T4303] 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. [ 59.873387][ T4303] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 59.919666][ T4303] device hsr_slave_0 entered promiscuous mode [ 59.928980][ T4303] device hsr_slave_1 entered promiscuous mode [ 59.942633][ T4303] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 59.950497][ T4303] Cannot create hsr debugfs directory [ 60.032923][ T4303] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 61.453274][ T4189] Bluetooth: hci0: command 0x0409 tx timeout [ 62.778279][ T4303] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 63.532375][ T4189] Bluetooth: hci0: command 0x041b tx timeout [ 64.277753][ T4303] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 64.358317][ T4303] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 64.517086][ T4303] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 64.525855][ T4303] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 64.540814][ T4303] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 64.549460][ T4303] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 64.601418][ T4303] 8021q: adding VLAN 0 to HW filter on device bond0 [ 64.614160][ T4233] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 64.621937][ T4233] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 64.637291][ T4303] 8021q: adding VLAN 0 to HW filter on device team0 [ 64.648005][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 64.656816][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 64.665433][ T9] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.672529][ T9] bridge0: port 1(bridge_slave_0) entered forwarding state [ 64.680236][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 64.694169][ T1438] device hsr_slave_0 left promiscuous mode [ 64.700702][ T1438] device hsr_slave_1 left promiscuous mode [ 64.707545][ T1438] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 64.715261][ T1438] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 64.725335][ T1438] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 64.732771][ T1438] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 64.740309][ T1438] device bridge_slave_1 left promiscuous mode [ 64.746853][ T1438] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.759298][ T1438] device bridge_slave_0 left promiscuous mode [ 64.767019][ T1438] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.781442][ T1438] device veth1_macvtap left promiscuous mode [ 64.788300][ T1438] device veth0_macvtap left promiscuous mode [ 64.794406][ T1438] device veth1_vlan left promiscuous mode [ 64.800300][ T1438] device veth0_vlan left promiscuous mode [ 64.921313][ T1438] team0 (unregistering): Port device team_slave_1 removed [ 64.932941][ T1438] team0 (unregistering): Port device team_slave_0 removed [ 64.947825][ T1438] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 64.960766][ T1438] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 65.008059][ T1438] bond0 (unregistering): Released all slaves [ 65.056181][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 65.064929][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 65.073376][ T9] bridge0: port 2(bridge_slave_1) entered blocking state [ 65.080406][ T9] bridge0: port 2(bridge_slave_1) entered forwarding state [ 65.091336][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 65.107019][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 65.116868][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 65.126172][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 65.151842][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 65.160581][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 65.173959][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 65.183114][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 65.191740][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 65.200025][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 65.208663][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 65.218016][ T4303] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 65.314861][ T4303] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 65.321886][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 65.329784][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 65.351526][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 65.360585][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 65.377385][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 65.385649][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 65.395346][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 65.403343][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 65.412400][ T4303] device veth0_vlan entered promiscuous mode [ 65.424758][ T4303] device veth1_vlan entered promiscuous mode [ 65.445665][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 65.462945][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 65.471204][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 65.482569][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 65.493166][ T4303] device veth0_macvtap entered promiscuous mode [ 65.502175][ T4303] device veth1_macvtap entered promiscuous mode [ 65.519849][ T4303] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 65.527309][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 65.536637][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 65.545322][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 65.554579][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 65.567169][ T4303] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 65.575616][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 65.585127][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 65.597721][ T4303] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 65.607259][ T4280] Bluetooth: hci0: command 0x040f tx timeout [ 65.614224][ T4303] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 65.624390][ T4303] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 65.633373][ T4303] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 65.690604][ T154] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 65.702529][ T154] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 65.713525][ T4233] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 65.736589][ T4233] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 65.745258][ T4233] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 65.756486][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 65.821714][ T4321] [ 65.824066][ T4321] ====================================================== [ 65.831081][ T4321] WARNING: possible circular locking dependency detected [ 65.838114][ T4321] syzkaller #0 Not tainted [ 65.842522][ T4321] ------------------------------------------------------ [ 65.849527][ T4321] syz.0.17/4321 is trying to acquire lock: [ 65.855324][ T4321] ffff888078744c28 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xc1/0x1b0 [ 65.866383][ T4321] [ 65.866383][ T4321] but task is already holding lock: [ 65.873739][ T4321] ffffffff8d4ba7e8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x19e/0x560 [ 65.883393][ T4321] [ 65.883393][ T4321] which lock already depends on the new lock. [ 65.883393][ T4321] [ 65.893782][ T4321] [ 65.893782][ T4321] the existing dependency chain (in reverse order) is: [ 65.902783][ T4321] [ 65.902783][ T4321] -> #4 (rfkill_global_mutex){+.+.}-{3:3}: [ 65.910769][ T4321] __mutex_lock_common+0x1eb/0x2390 [ 65.916488][ T4321] mutex_lock_nested+0x17/0x20 [ 65.921765][ T4321] rfkill_register+0x33/0x8a0 [ 65.926958][ T4321] hci_register_dev+0x452/0x970 [ 65.932328][ T4321] vhci_create_device+0x32c/0x5c0 [ 65.937868][ T4321] vhci_write+0x391/0x450 [ 65.942709][ T4321] vfs_write+0x712/0xd00 [ 65.947463][ T4321] ksys_write+0x14d/0x250 [ 65.952301][ T4321] do_syscall_64+0x4c/0xa0 [ 65.957231][ T4321] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 65.963637][ T4321] [ 65.963637][ T4321] -> #3 (&data->open_mutex){+.+.}-{3:3}: [ 65.971435][ T4321] __mutex_lock_common+0x1eb/0x2390 [ 65.977141][ T4321] mutex_lock_nested+0x17/0x20 [ 65.982409][ T4321] vhci_send_frame+0x88/0x100 [ 65.987585][ T4321] hci_send_frame+0x1a9/0x2e0 [ 65.992758][ T4321] hci_tx_work+0x9f9/0x1710 [ 65.997762][ T4321] process_one_work+0x863/0x1000 [ 66.003200][ T4321] worker_thread+0xaa8/0x12a0 [ 66.008377][ T4321] kthread+0x436/0x520 [ 66.012942][ T4321] ret_from_fork+0x1f/0x30 [ 66.017859][ T4321] [ 66.017859][ T4321] -> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}: [ 66.027057][ T4321] __flush_work+0xdd/0x1b0 [ 66.031975][ T4321] hci_dev_do_close+0x1e7/0x1030 [ 66.037413][ T4321] hci_unregister_dev+0x2d7/0x580 [ 66.042935][ T4321] vhci_release+0x73/0xc0 [ 66.047766][ T4321] __fput+0x234/0x930 [ 66.052246][ T4321] task_work_run+0x125/0x1a0 [ 66.057335][ T4321] do_exit+0x61e/0x20a0 [ 66.061987][ T4321] do_group_exit+0x12e/0x300 [ 66.067073][ T4321] get_signal+0x6ca/0x12c0 [ 66.071989][ T4321] arch_do_signal_or_restart+0xc1/0x1300 [ 66.078120][ T4321] exit_to_user_mode_loop+0x9e/0x130 [ 66.083905][ T4321] exit_to_user_mode_prepare+0xee/0x180 [ 66.089948][ T4321] syscall_exit_to_user_mode+0x16/0x40 [ 66.095910][ T4321] do_syscall_64+0x58/0xa0 [ 66.100826][ T4321] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 66.107217][ T4321] [ 66.107217][ T4321] -> #1 (&hdev->req_lock){+.+.}-{3:3}: [ 66.114836][ T4321] __mutex_lock_common+0x1eb/0x2390 [ 66.120532][ T4321] mutex_lock_nested+0x17/0x20 [ 66.125794][ T4321] bg_scan_update+0x44/0x3b0 [ 66.130895][ T4321] process_one_work+0x863/0x1000 [ 66.136329][ T4321] worker_thread+0xaa8/0x12a0 [ 66.141509][ T4321] kthread+0x436/0x520 [ 66.146085][ T4321] ret_from_fork+0x1f/0x30 [ 66.150998][ T4321] [ 66.150998][ T4321] -> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}: [ 66.160787][ T4321] __lock_acquire+0x2c33/0x7c60 [ 66.166138][ T4321] lock_acquire+0x197/0x3f0 [ 66.171139][ T4321] __flush_work+0xdd/0x1b0 [ 66.176051][ T4321] __cancel_work_timer+0x3ac/0x520 [ 66.181664][ T4321] hci_request_cancel_all+0xcc/0x300 [ 66.187456][ T4321] hci_dev_do_close+0x4e/0x1030 [ 66.192826][ T4321] hci_rfkill_set_block+0x10a/0x190 [ 66.198539][ T4321] rfkill_set_block+0x1c6/0x420 [ 66.203910][ T4321] rfkill_fop_write+0x458/0x560 [ 66.209272][ T4321] vfs_write+0x300/0xd00 [ 66.214016][ T4321] ksys_write+0x14d/0x250 [ 66.218860][ T4321] do_syscall_64+0x4c/0xa0 [ 66.223777][ T4321] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 66.230170][ T4321] [ 66.230170][ T4321] other info that might help us debug this: [ 66.230170][ T4321] [ 66.240371][ T4321] Chain exists of: [ 66.240371][ T4321] (work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex [ 66.240371][ T4321] [ 66.256072][ T4321] Possible unsafe locking scenario: [ 66.256072][ T4321] [ 66.263501][ T4321] CPU0 CPU1 [ 66.268839][ T4321] ---- ---- [ 66.274179][ T4321] lock(rfkill_global_mutex); [ 66.278922][ T4321] lock(&data->open_mutex); [ 66.286005][ T4321] lock(rfkill_global_mutex); [ 66.293264][ T4321] lock((work_completion)(&hdev->bg_scan_update)); [ 66.299828][ T4321] [ 66.299828][ T4321] *** DEADLOCK *** [ 66.299828][ T4321] [ 66.307946][ T4321] 1 lock held by syz.0.17/4321: [ 66.312769][ T4321] #0: ffffffff8d4ba7e8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x19e/0x560 [ 66.322851][ T4321] [ 66.322851][ T4321] stack backtrace: [ 66.328728][ T4321] CPU: 1 PID: 4321 Comm: syz.0.17 Not tainted syzkaller #0 [ 66.335906][ T4321] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 [ 66.345947][ T4321] Call Trace: [ 66.349217][ T4321] [ 66.352136][ T4321] dump_stack_lvl+0x168/0x230 [ 66.356795][ T4321] ? load_image+0x3b0/0x3b0 [ 66.361281][ T4321] ? show_regs_print_info+0x20/0x20 [ 66.366462][ T4321] ? print_circular_bug+0x12b/0x1a0 [ 66.371648][ T4321] check_noncircular+0x274/0x310 [ 66.376566][ T4321] ? add_chain_block+0x940/0x940 [ 66.381481][ T4321] ? lockdep_lock+0xdc/0x1e0 [ 66.386050][ T4321] ? __lock_acquire+0x12d9/0x7c60 [ 66.391060][ T4321] ? lockdep_lock+0x1e0/0x1e0 [ 66.395713][ T4321] ? mark_lock+0x94/0x320 [ 66.400022][ T4321] __lock_acquire+0x2c33/0x7c60 [ 66.404862][ T4321] ? verify_lock_unused+0x140/0x140 [ 66.410045][ T4321] ? verify_lock_unused+0x140/0x140 [ 66.415222][ T4321] ? mark_lock+0x94/0x320 [ 66.419532][ T4321] ? __lock_acquire+0x13ad/0x7c60 [ 66.424542][ T4321] lock_acquire+0x197/0x3f0 [ 66.429037][ T4321] ? __flush_work+0xc1/0x1b0 [ 66.433604][ T4321] ? __lock_acquire+0x7c60/0x7c60 [ 66.438613][ T4321] ? read_lock_is_recursive+0x10/0x10 [ 66.443968][ T4321] ? start_flush_work+0x776/0x820 [ 66.448979][ T4321] ? _raw_spin_unlock_irqrestore+0xaa/0x100 [ 66.454849][ T4321] ? _raw_spin_unlock+0x40/0x40 [ 66.459679][ T4321] __flush_work+0xdd/0x1b0 [ 66.464078][ T4321] ? __flush_work+0xc1/0x1b0 [ 66.468650][ T4321] ? flush_work+0x20/0x20 [ 66.472958][ T4321] ? try_to_grab_pending+0xf3/0x7e0 [ 66.478134][ T4321] ? lockdep_hardirqs_off+0x70/0x100 [ 66.483418][ T4321] ? mark_lock+0x94/0x320 [ 66.487772][ T4321] ? lockdep_hardirqs_on_prepare+0x3fc/0x760 [ 66.493751][ T4321] ? lock_chain_count+0x20/0x20 [ 66.498589][ T4321] ? mark_lock+0x94/0x320 [ 66.503164][ T4321] ? __cancel_work_timer+0x331/0x520 [ 66.508432][ T4321] __cancel_work_timer+0x3ac/0x520 [ 66.513527][ T4321] ? cancel_work_sync+0x20/0x20 [ 66.518359][ T4321] ? __cancel_work+0x1f4/0x2d0 [ 66.523112][ T4321] ? lockdep_hardirqs_on+0x94/0x140 [ 66.528292][ T4321] ? __cancel_work+0x26f/0x2d0 [ 66.533036][ T4321] ? cancel_work+0x20/0x20 [ 66.537436][ T4321] ? lock_chain_count+0x20/0x20 [ 66.542269][ T4321] hci_request_cancel_all+0xcc/0x300 [ 66.547537][ T4321] hci_dev_do_close+0x4e/0x1030 [ 66.552367][ T4321] ? _raw_spin_unlock_irqrestore+0xaa/0x100 [ 66.558245][ T4321] ? _raw_spin_unlock+0x40/0x40 [ 66.563073][ T4321] hci_rfkill_set_block+0x10a/0x190 [ 66.568253][ T4321] ? rcu_lock_release+0x20/0x20 [ 66.573083][ T4321] rfkill_set_block+0x1c6/0x420 [ 66.577914][ T4321] rfkill_fop_write+0x458/0x560 [ 66.582744][ T4321] ? verify_lock_unused+0x140/0x140 [ 66.587922][ T4321] ? rfkill_fop_read+0x4b0/0x4b0 [ 66.592844][ T4321] ? common_file_perm+0xc0/0x1c0 [ 66.597772][ T4321] ? fsnotify_perm+0x5d/0x560 [ 66.602451][ T4321] ? security_file_permission+0x75/0xa0 [ 66.608238][ T4321] ? rfkill_fop_read+0x4b0/0x4b0 [ 66.613158][ T4321] vfs_write+0x300/0xd00 [ 66.617383][ T4321] ? file_end_write+0x250/0x250 [ 66.622211][ T4321] ? __context_tracking_exit+0x4c/0x80 [ 66.627655][ T4321] ? __lock_acquire+0x7c60/0x7c60 [ 66.632659][ T4321] ? __fdget_pos+0x1e2/0x370 [ 66.637228][ T4321] ksys_write+0x14d/0x250 [ 66.641533][ T4321] ? __ia32_sys_read+0x80/0x80 [ 66.646271][ T4321] ? lockdep_hardirqs_on+0x94/0x140 [ 66.651448][ T4321] do_syscall_64+0x4c/0xa0 [ 66.655841][ T4321] ? clear_bhb_loop+0x30/0x80 [ 66.660498][ T4321] ? clear_bhb_loop+0x30/0x80 [ 66.665153][ T4321] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 66.671038][ T4321] RIP: 0033:0x7fd4f70b7749 [ 66.675435][ T4321] 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 [ 66.695018][ T4321] RSP: 002b:00007fff63b3bc38 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 66.703410][ T4321] RAX: ffffffffffffffda RBX: 00007fd4f730dfa0 RCX: 00007fd4f70b7749 [ 66.711363][ T4321] RDX: 0000000000000008 RSI: 0000200000000000 RDI: 0000000000000003 [ 66.719313][ T4321] RBP: 00007fd4f713bf91 R08: 0000000000000000 R09: 0000000000000000 [ 66.727265][ T4321] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 66.735214][ T4321] R13: 00007fd4f730dfa0 R14: 00007fd4f730dfa0 R15: 0000000000000003 [ 66.743166][ T4321]