Warning: Permanently added '10.128.0.69' (ED25519) to the list of known hosts. 2026/04/26 04:06:37 parsed 1 programs syzkaller login: [ 64.268269][ T4190] cgroup: Unknown subsys name 'net' [ 64.413860][ T4190] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 65.887619][ T4190] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 68.271858][ T4223] chnl_net:caif_netlink_parms(): no params data found [ 68.343163][ T4223] bridge0: port 1(bridge_slave_0) entered blocking state [ 68.351053][ T4223] bridge0: port 1(bridge_slave_0) entered disabled state [ 68.360994][ T4223] device bridge_slave_0 entered promiscuous mode [ 68.371321][ T4223] bridge0: port 2(bridge_slave_1) entered blocking state [ 68.379969][ T4223] bridge0: port 2(bridge_slave_1) entered disabled state [ 68.388368][ T4223] device bridge_slave_1 entered promiscuous mode [ 68.416840][ T4223] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 68.431147][ T4223] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 68.462665][ T4223] team0: Port device team_slave_0 added [ 68.471033][ T4223] team0: Port device team_slave_1 added [ 68.495195][ T4223] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 68.503755][ T4223] 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. [ 68.531879][ T4223] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 68.545541][ T4223] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 68.554186][ T4223] 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. [ 68.582294][ T4223] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 68.626624][ T4223] device hsr_slave_0 entered promiscuous mode [ 68.634350][ T4223] device hsr_slave_1 entered promiscuous mode [ 68.786229][ T4223] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 68.800714][ T4223] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 68.811539][ T4223] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 68.823685][ T4223] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 68.857520][ T4223] bridge0: port 2(bridge_slave_1) entered blocking state [ 68.864889][ T4223] bridge0: port 2(bridge_slave_1) entered forwarding state [ 68.874464][ T4223] bridge0: port 1(bridge_slave_0) entered blocking state [ 68.881720][ T4223] bridge0: port 1(bridge_slave_0) entered forwarding state [ 68.946808][ T4223] 8021q: adding VLAN 0 to HW filter on device bond0 [ 68.966652][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 68.978984][ T3061] bridge0: port 1(bridge_slave_0) entered disabled state [ 68.987740][ T3061] bridge0: port 2(bridge_slave_1) entered disabled state [ 69.001689][ T4223] 8021q: adding VLAN 0 to HW filter on device team0 [ 69.019684][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 69.029234][ T155] bridge0: port 1(bridge_slave_0) entered blocking state [ 69.036403][ T155] bridge0: port 1(bridge_slave_0) entered forwarding state [ 69.044460][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 69.055323][ T155] bridge0: port 2(bridge_slave_1) entered blocking state [ 69.062457][ T155] bridge0: port 2(bridge_slave_1) entered forwarding state [ 69.084533][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 69.094049][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 69.106911][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 69.130094][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 69.139988][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 69.151269][ T4223] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 69.260158][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 69.267748][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 69.285527][ T4223] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 69.307424][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 69.317405][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 69.364897][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 69.379929][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 69.394833][ T4223] device veth0_vlan entered promiscuous mode [ 69.407854][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 69.416356][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 69.426932][ T4223] device veth1_vlan entered promiscuous mode [ 69.445900][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 69.454553][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 69.463251][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 69.473015][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 69.483965][ T4223] device veth0_macvtap entered promiscuous mode [ 69.493745][ T4223] device veth1_macvtap entered promiscuous mode [ 69.509337][ T4223] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 69.525277][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 69.534419][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 69.543594][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 69.553437][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 69.565478][ T4223] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 69.575611][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 69.585020][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 69.603986][ T4223] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 69.613009][ T4223] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 69.622831][ T4223] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 69.631784][ T4223] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 69.736393][ T4223] syz-executor (4223) used greatest stack depth: 20432 bytes left [ 70.416024][ T144] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 70.429747][ T144] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 70.453325][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 70.479383][ T3061] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 70.487255][ T3061] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 70.496446][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 71.481637][ T1431] ieee802154 phy0 wpan0: encryption failed: -22 [ 71.488416][ T1431] ieee802154 phy1 wpan1: encryption failed: -22 2026/04/26 04:06:46 executed programs: 0 [ 71.987168][ T154] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 72.098122][ T4281] chnl_net:caif_netlink_parms(): no params data found [ 72.136928][ T4281] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.144328][ T4281] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.152341][ T4281] device bridge_slave_0 entered promiscuous mode [ 72.160995][ T4281] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.169224][ T4281] bridge0: port 2(bridge_slave_1) entered disabled state [ 72.177242][ T4281] device bridge_slave_1 entered promiscuous mode [ 72.196671][ T4281] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 72.207743][ T4281] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 72.229194][ T4281] team0: Port device team_slave_0 added [ 72.236706][ T4281] team0: Port device team_slave_1 added [ 72.254180][ T4281] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 72.261219][ T4281] 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. [ 72.288737][ T4281] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 72.300662][ T4281] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 72.307627][ T4281] 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. [ 72.334298][ T4281] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 72.363868][ T4281] device hsr_slave_0 entered promiscuous mode [ 72.371441][ T4281] device hsr_slave_1 entered promiscuous mode [ 72.379036][ T4281] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 72.386930][ T4281] Cannot create hsr debugfs directory [ 74.049307][ T4236] Bluetooth: hci0: command 0x0409 tx timeout [ 74.694050][ T154] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 74.752999][ T154] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 74.804987][ T154] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 75.662286][ T4281] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 75.673322][ T4281] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 75.683668][ T4281] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 75.712051][ T4281] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 75.776909][ T4281] 8021q: adding VLAN 0 to HW filter on device bond0 [ 75.793641][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 75.802427][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 75.816056][ T4281] 8021q: adding VLAN 0 to HW filter on device team0 [ 75.825882][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 75.835077][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 75.843772][ T144] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.851140][ T144] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.861457][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 75.885947][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 75.895037][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 75.904367][ T144] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.911615][ T144] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.922122][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 75.959284][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 75.968352][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 75.977356][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 75.986300][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 75.997102][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 76.006114][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 76.043033][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 76.051723][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 76.060542][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 76.071002][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 76.082392][ T4281] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 76.128313][ T13] Bluetooth: hci0: command 0x041b tx timeout [ 76.224689][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 76.232930][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 76.245197][ T4281] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 76.262800][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 76.271872][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 76.300557][ T4281] device veth0_vlan entered promiscuous mode [ 76.309596][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 76.318846][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 76.327131][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 76.336457][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 76.356630][ T4281] device veth1_vlan entered promiscuous mode [ 76.374409][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 76.383243][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 76.392165][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 76.401309][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 76.412527][ T4281] device veth0_macvtap entered promiscuous mode [ 76.439269][ T154] device hsr_slave_0 left promiscuous mode [ 76.446243][ T154] device hsr_slave_1 left promiscuous mode [ 76.453731][ T154] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 76.462444][ T154] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 76.471293][ T154] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 76.478828][ T154] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 76.486415][ T154] device bridge_slave_1 left promiscuous mode [ 76.494066][ T154] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.507375][ T154] device bridge_slave_0 left promiscuous mode [ 76.514526][ T154] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.532097][ T154] device veth1_macvtap left promiscuous mode [ 76.538558][ T154] device veth0_macvtap left promiscuous mode [ 76.544596][ T154] device veth1_vlan left promiscuous mode [ 76.551532][ T154] device veth0_vlan left promiscuous mode [ 76.714216][ T154] team0 (unregistering): Port device team_slave_1 removed [ 76.726197][ T154] team0 (unregistering): Port device team_slave_0 removed [ 76.739160][ T154] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 76.755383][ T154] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 76.813338][ T154] bond0 (unregistering): Released all slaves [ 76.894608][ T4281] device veth1_macvtap entered promiscuous mode [ 76.904408][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 76.912780][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 76.933010][ T4281] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 76.940813][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 76.950446][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 76.963336][ T4281] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 76.970903][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 76.981138][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 76.993440][ T4281] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.002706][ T4281] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.011782][ T4281] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.021775][ T4281] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.089665][ T144] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.097693][ T144] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.109095][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 77.137667][ T155] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.146644][ T155] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.155095][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 77.209768][ T4337] [ 77.212158][ T4337] ====================================================== [ 77.219254][ T4337] WARNING: possible circular locking dependency detected [ 77.226299][ T4337] syzkaller #0 Not tainted [ 77.230725][ T4337] ------------------------------------------------------ [ 77.237728][ T4337] syz.0.17/4337 is trying to acquire lock: [ 77.243773][ T4337] ffff88807762cc28 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xfa/0x210 [ 77.254903][ T4337] [ 77.254903][ T4337] but task is already holding lock: [ 77.262368][ T4337] ffffffff8d6c5de8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x18b/0x560 [ 77.272201][ T4337] [ 77.272201][ T4337] which lock already depends on the new lock. [ 77.272201][ T4337] [ 77.282970][ T4337] [ 77.282970][ T4337] the existing dependency chain (in reverse order) is: [ 77.292089][ T4337] [ 77.292089][ T4337] -> #4 (rfkill_global_mutex){+.+.}-{3:3}: [ 77.300262][ T4337] __mutex_lock_common+0x1e3/0x2400 [ 77.305986][ T4337] mutex_lock_nested+0x17/0x20 [ 77.311356][ T4337] rfkill_register+0x33/0x980 [ 77.316655][ T4337] hci_register_dev+0x452/0x970 [ 77.322114][ T4337] vhci_create_device+0x32c/0x5c0 [ 77.327672][ T4337] vhci_write+0x391/0x450 [ 77.332601][ T4337] vfs_write+0x745/0xd60 [ 77.337458][ T4337] ksys_write+0x152/0x260 [ 77.342470][ T4337] do_syscall_64+0x4c/0xa0 [ 77.347691][ T4337] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 77.354241][ T4337] [ 77.354241][ T4337] -> #3 (&data->open_mutex){+.+.}-{3:3}: [ 77.362230][ T4337] __mutex_lock_common+0x1e3/0x2400 [ 77.367954][ T4337] mutex_lock_nested+0x17/0x20 [ 77.373249][ T4337] vhci_send_frame+0x88/0x100 [ 77.378445][ T4337] hci_send_frame+0x1a9/0x2e0 [ 77.383633][ T4337] hci_tx_work+0x9f9/0x1710 [ 77.388648][ T4337] process_one_work+0x85f/0x1010 [ 77.394101][ T4337] worker_thread+0xaa6/0x1290 [ 77.399287][ T4337] kthread+0x436/0x520 [ 77.403861][ T4337] ret_from_fork+0x1f/0x30 [ 77.408786][ T4337] [ 77.408786][ T4337] -> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}: [ 77.418070][ T4337] __flush_work+0x116/0x210 [ 77.423233][ T4337] hci_dev_do_close+0x1e7/0x1030 [ 77.428772][ T4337] hci_unregister_dev+0x2d7/0x580 [ 77.434569][ T4337] vhci_release+0x73/0xc0 [ 77.439416][ T4337] __fput+0x234/0x930 [ 77.444042][ T4337] task_work_run+0x125/0x1a0 [ 77.449305][ T4337] do_exit+0x626/0x20c0 [ 77.454167][ T4337] do_group_exit+0x12e/0x300 [ 77.459353][ T4337] get_signal+0x6ca/0x12c0 [ 77.464658][ T4337] arch_do_signal_or_restart+0xe7/0x12c0 [ 77.471327][ T4337] exit_to_user_mode_loop+0x9e/0x130 [ 77.477151][ T4337] exit_to_user_mode_prepare+0xee/0x180 [ 77.483215][ T4337] syscall_exit_to_user_mode+0x16/0x40 [ 77.489195][ T4337] do_syscall_64+0x58/0xa0 [ 77.494125][ T4337] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 77.500529][ T4337] [ 77.500529][ T4337] -> #1 (&hdev->req_lock){+.+.}-{3:3}: [ 77.508173][ T4337] __mutex_lock_common+0x1e3/0x2400 [ 77.514010][ T4337] mutex_lock_nested+0x17/0x20 [ 77.519290][ T4337] bg_scan_update+0x44/0x3b0 [ 77.524395][ T4337] process_one_work+0x85f/0x1010 [ 77.529928][ T4337] worker_thread+0xaa6/0x1290 [ 77.535243][ T4337] kthread+0x436/0x520 [ 77.539907][ T4337] ret_from_fork+0x1f/0x30 [ 77.544934][ T4337] [ 77.544934][ T4337] -> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}: [ 77.554906][ T4337] __lock_acquire+0x2c42/0x7d10 [ 77.560490][ T4337] lock_acquire+0x19e/0x400 [ 77.565594][ T4337] __flush_work+0x116/0x210 [ 77.570604][ T4337] __cancel_work_timer+0x3f4/0x560 [ 77.576225][ T4337] hci_request_cancel_all+0xcc/0x300 [ 77.582023][ T4337] hci_dev_do_close+0x4e/0x1030 [ 77.587385][ T4337] hci_rfkill_set_block+0x10a/0x190 [ 77.593094][ T4337] rfkill_set_block+0x1c9/0x3d0 [ 77.598462][ T4337] rfkill_fop_write+0x452/0x560 [ 77.603830][ T4337] vfs_write+0x30b/0xd60 [ 77.609053][ T4337] ksys_write+0x152/0x260 [ 77.614178][ T4337] do_syscall_64+0x4c/0xa0 [ 77.619380][ T4337] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 77.626105][ T4337] [ 77.626105][ T4337] other info that might help us debug this: [ 77.626105][ T4337] [ 77.636774][ T4337] Chain exists of: [ 77.636774][ T4337] (work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex [ 77.636774][ T4337] [ 77.652957][ T4337] Possible unsafe locking scenario: [ 77.652957][ T4337] [ 77.660765][ T4337] CPU0 CPU1 [ 77.666119][ T4337] ---- ---- [ 77.671483][ T4337] lock(rfkill_global_mutex); [ 77.676324][ T4337] lock(&data->open_mutex); [ 77.683638][ T4337] lock(rfkill_global_mutex); [ 77.691002][ T4337] lock((work_completion)(&hdev->bg_scan_update)); [ 77.697600][ T4337] [ 77.697600][ T4337] *** DEADLOCK *** [ 77.697600][ T4337] [ 77.705737][ T4337] 1 lock held by syz.0.17/4337: [ 77.710574][ T4337] #0: ffffffff8d6c5de8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x18b/0x560 [ 77.720657][ T4337] [ 77.720657][ T4337] stack backtrace: [ 77.726544][ T4337] CPU: 0 PID: 4337 Comm: syz.0.17 Not tainted syzkaller #0 [ 77.733904][ T4337] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 [ 77.744353][ T4337] Call Trace: [ 77.747726][ T4337] [ 77.750674][ T4337] dump_stack_lvl+0x188/0x250 [ 77.755351][ T4337] ? load_image+0x400/0x400 [ 77.759866][ T4337] ? show_regs_print_info+0x20/0x20 [ 77.765062][ T4337] ? print_circular_bug+0x12b/0x1a0 [ 77.770249][ T4337] check_noncircular+0x296/0x330 [ 77.775176][ T4337] ? look_up_lock_class+0x71/0x110 [ 77.780278][ T4337] ? add_chain_block+0x940/0x940 [ 77.785204][ T4337] ? lockdep_lock+0xf1/0x1f0 [ 77.789811][ T4337] ? __lock_acquire+0x12e8/0x7d10 [ 77.794838][ T4337] ? mark_lock+0x94/0x320 [ 77.799158][ T4337] ? _find_first_zero_bit+0xce/0xf0 [ 77.804351][ T4337] __lock_acquire+0x2c42/0x7d10 [ 77.809200][ T4337] ? verify_lock_unused+0x140/0x140 [ 77.814408][ T4337] ? mark_lock+0x94/0x320 [ 77.818823][ T4337] ? verify_lock_unused+0x140/0x140 [ 77.824105][ T4337] lock_acquire+0x19e/0x400 [ 77.828606][ T4337] ? __flush_work+0xfa/0x210 [ 77.833280][ T4337] ? __lock_acquire+0x7d10/0x7d10 [ 77.838471][ T4337] ? read_lock_is_recursive+0x10/0x10 [ 77.843930][ T4337] ? start_flush_work+0x776/0x820 [ 77.849052][ T4337] __flush_work+0x116/0x210 [ 77.853914][ T4337] ? __flush_work+0xfa/0x210 [ 77.858777][ T4337] ? flush_work+0x20/0x20 [ 77.863169][ T4337] ? try_to_grab_pending+0xfa/0x7f0 [ 77.868758][ T4337] ? mark_lock+0x94/0x320 [ 77.873272][ T4337] ? lockdep_hardirqs_on_prepare+0x409/0x770 [ 77.879339][ T4337] ? lock_chain_count+0x20/0x20 [ 77.884285][ T4337] ? mark_lock+0x94/0x320 [ 77.888630][ T4337] ? __cancel_work_timer+0x36a/0x560 [ 77.894031][ T4337] __cancel_work_timer+0x3f4/0x560 [ 77.899500][ T4337] ? cancel_work_sync+0x20/0x20 [ 77.904429][ T4337] ? __cancel_work+0x1f9/0x2e0 [ 77.909499][ T4337] ? lockdep_hardirqs_on+0x94/0x140 [ 77.914884][ T4337] ? __cancel_work+0x27b/0x2e0 [ 77.919638][ T4337] ? cancel_work+0x20/0x20 [ 77.924135][ T4337] ? lock_chain_count+0x20/0x20 [ 77.929068][ T4337] hci_request_cancel_all+0xcc/0x300 [ 77.934445][ T4337] hci_dev_do_close+0x4e/0x1030 [ 77.939298][ T4337] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 77.945541][ T4337] ? _raw_spin_unlock+0x40/0x40 [ 77.950691][ T4337] hci_rfkill_set_block+0x10a/0x190 [ 77.955894][ T4337] ? rcu_lock_release+0x20/0x20 [ 77.960950][ T4337] rfkill_set_block+0x1c9/0x3d0 [ 77.966199][ T4337] rfkill_fop_write+0x452/0x560 [ 77.971231][ T4337] ? rfkill_fop_read+0x520/0x520 [ 77.976432][ T4337] ? common_file_perm+0x140/0x1c0 [ 77.981853][ T4337] ? fsnotify_perm+0x5d/0x560 [ 77.986567][ T4337] ? security_file_permission+0x75/0xa0 [ 77.992249][ T4337] ? rfkill_fop_read+0x520/0x520 [ 77.997513][ T4337] vfs_write+0x30b/0xd60 [ 78.001981][ T4337] ? file_end_write+0x250/0x250 [ 78.006828][ T4337] ? __context_tracking_exit+0x4c/0x80 [ 78.012447][ T4337] ? __lock_acquire+0x7d10/0x7d10 [ 78.017663][ T4337] ? __fdget_pos+0x1e2/0x370 [ 78.022457][ T4337] ksys_write+0x152/0x260 [ 78.026991][ T4337] ? __ia32_sys_read+0x80/0x80 [ 78.031877][ T4337] ? lockdep_hardirqs_on+0x94/0x140 [ 78.037077][ T4337] do_syscall_64+0x4c/0xa0 [ 78.041485][ T4337] ? clear_bhb_loop+0x30/0x80 [ 78.046263][ T4337] ? clear_bhb_loop+0x30/0x80 [ 78.050934][ T4337] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 78.056931][ T4337] RIP: 0033:0x7fa84816ddd9 [ 78.061537][ T4337] 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 [ 78.081459][ T4337] RSP: 002b:00007fffaabb2798 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 78.089905][ T4337] RAX: ffffffffffffffda RBX: 00007fa8483e6fa0 RCX: 00007fa84816ddd9 [ 78.097974][ T4337] RDX: 0000000000000008 RSI: 0000200000000000 RDI: 0000000000000003 [ 78.106163][ T4337] RBP: 00007fa848203d69 R08: 0000000000000000 R09: 0000000000000000 [ 78.114391][ T4337] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 78.122578][ T4337] R13: 00007fa8483e6fac R14: 00007fa8483e6fa0 R15: 00007fa8483e6fa0 [ 78.130649][ T4337]