no interfaces have a carrier [ 37.035806][ T3854] 8021q: adding VLAN 0 to HW filter on device bond0 [ 37.045729][ T3854] eql: remember to turn off Van-Jacobson compression on your slave devices Starting crond: OK Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.171' (ED25519) to the list of known hosts. 2026/04/06 10:56:01 parsed 1 programs syzkaller login: [ 62.521219][ T4188] cgroup: Unknown subsys name 'net' [ 62.647728][ T4188] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 64.084975][ T4188] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 66.066726][ T4214] chnl_net:caif_netlink_parms(): no params data found [ 66.111397][ T4214] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.118910][ T4214] bridge0: port 1(bridge_slave_0) entered disabled state [ 66.126953][ T4214] device bridge_slave_0 entered promiscuous mode [ 66.139074][ T4214] bridge0: port 2(bridge_slave_1) entered blocking state [ 66.146916][ T4214] bridge0: port 2(bridge_slave_1) entered disabled state [ 66.154839][ T4214] device bridge_slave_1 entered promiscuous mode [ 66.174478][ T4214] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 66.187957][ T4214] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 66.215776][ T4214] team0: Port device team_slave_0 added [ 66.224069][ T4214] team0: Port device team_slave_1 added [ 66.247163][ T4214] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 66.254299][ T4214] 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. [ 66.280349][ T4214] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 66.293505][ T4214] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 66.300477][ T4214] 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. [ 66.326593][ T4214] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 66.367315][ T4214] device hsr_slave_0 entered promiscuous mode [ 66.374269][ T4214] device hsr_slave_1 entered promiscuous mode [ 66.509457][ T4214] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 66.523575][ T4214] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 66.540575][ T4214] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 66.550758][ T4214] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 66.586563][ T4214] bridge0: port 2(bridge_slave_1) entered blocking state [ 66.594039][ T4214] bridge0: port 2(bridge_slave_1) entered forwarding state [ 66.602134][ T4214] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.609233][ T4214] bridge0: port 1(bridge_slave_0) entered forwarding state [ 66.678814][ T4214] 8021q: adding VLAN 0 to HW filter on device bond0 [ 66.699334][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 66.711255][ T9] bridge0: port 1(bridge_slave_0) entered disabled state [ 66.720948][ T9] bridge0: port 2(bridge_slave_1) entered disabled state [ 66.737504][ T4214] 8021q: adding VLAN 0 to HW filter on device team0 [ 66.750817][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 66.759698][ T9] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.766817][ T9] bridge0: port 1(bridge_slave_0) entered forwarding state [ 66.783037][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 66.792477][ T1225] bridge0: port 2(bridge_slave_1) entered blocking state [ 66.799570][ T1225] bridge0: port 2(bridge_slave_1) entered forwarding state [ 66.824995][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 66.844778][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 66.855617][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 66.865940][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 66.879831][ T4214] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 66.892793][ T4214] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 66.901561][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 67.034871][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 67.043939][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 67.058559][ T4214] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 67.083124][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 67.093384][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 67.123942][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 67.143957][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 67.156067][ T4214] device veth0_vlan entered promiscuous mode [ 67.163556][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 67.173332][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 67.186671][ T4214] device veth1_vlan entered promiscuous mode [ 67.215092][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 67.224975][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 67.234575][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 67.243342][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 67.255906][ T4214] device veth0_macvtap entered promiscuous mode [ 67.267622][ T4214] device veth1_macvtap entered promiscuous mode [ 67.288027][ T4214] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 67.296862][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 67.306742][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 67.315838][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 67.324917][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 67.338385][ T4214] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 67.347468][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 67.356858][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 67.370658][ T4214] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 67.381406][ T4214] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 67.392801][ T4214] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 67.401645][ T4214] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 67.550795][ T4214] syz-executor (4214) used greatest stack depth: 20344 bytes left [ 67.619544][ T154] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 70.207906][ T154] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 71.535401][ T1422] ieee802154 phy0 wpan0: encryption failed: -22 [ 71.542279][ T1422] ieee802154 phy1 wpan1: encryption failed: -22 [ 72.567339][ T154] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 72.619232][ T154] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 73.094709][ T144] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 73.126343][ T144] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 73.148734][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 73.162688][ T1225] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 73.170565][ T1225] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 73.180180][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 73.829812][ T154] device hsr_slave_0 left promiscuous mode [ 73.854230][ T154] device hsr_slave_1 left promiscuous mode [ 73.866935][ T154] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 73.887152][ T154] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 73.897944][ T154] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 73.906495][ T154] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 73.916976][ T154] device bridge_slave_1 left promiscuous mode [ 73.924954][ T154] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.944156][ T154] device bridge_slave_0 left promiscuous mode [ 73.950435][ T154] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.975342][ T154] device veth1_macvtap left promiscuous mode [ 73.981795][ T154] device veth0_macvtap left promiscuous mode [ 73.988548][ T154] device veth1_vlan left promiscuous mode [ 73.995956][ T154] device veth0_vlan left promiscuous mode [ 74.180793][ T154] team0 (unregistering): Port device team_slave_1 removed [ 74.199026][ T154] team0 (unregistering): Port device team_slave_0 removed [ 74.211095][ T154] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 74.225998][ T154] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 74.277711][ T154] bond0 (unregistering): Released all slaves 2026/04/06 10:56:15 executed programs: 0 [ 75.187828][ T4340] chnl_net:caif_netlink_parms(): no params data found [ 75.313802][ T4340] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.320989][ T4340] bridge0: port 1(bridge_slave_0) entered disabled state [ 75.329354][ T4340] device bridge_slave_0 entered promiscuous mode [ 75.344163][ T4340] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.356967][ T4340] bridge0: port 2(bridge_slave_1) entered disabled state [ 75.365385][ T4340] device bridge_slave_1 entered promiscuous mode [ 75.390012][ T4340] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 75.402094][ T4340] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 75.430390][ T4340] team0: Port device team_slave_0 added [ 75.444154][ T4340] team0: Port device team_slave_1 added [ 75.487508][ T4340] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 75.502056][ T4340] 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. [ 75.538400][ T4340] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 75.575797][ T4340] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 75.583247][ T4340] 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. [ 75.611400][ T4340] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 75.650286][ T4340] device hsr_slave_0 entered promiscuous mode [ 75.659902][ T4340] device hsr_slave_1 entered promiscuous mode [ 76.384023][ T4340] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 76.398796][ T4340] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 76.411004][ T4340] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 76.435859][ T4340] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 76.574443][ T4340] 8021q: adding VLAN 0 to HW filter on device bond0 [ 76.604424][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 76.613582][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 76.635497][ T4340] 8021q: adding VLAN 0 to HW filter on device team0 [ 76.656414][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 76.672868][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 76.683476][ T403] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.690692][ T403] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.709672][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 76.717741][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 76.726645][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 76.735194][ T403] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.742407][ T403] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.750536][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 76.767311][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 76.780361][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 76.790988][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 76.813936][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 76.822843][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 76.831819][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 76.844662][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 76.854980][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 76.865145][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 76.874237][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 76.887855][ T4340] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 77.083697][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 77.091567][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 77.111506][ T4340] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 77.151283][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 77.161345][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 77.194950][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 77.203843][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 77.219782][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 77.228584][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 77.239533][ T4420] Bluetooth: hci0: command 0x0409 tx timeout [ 77.246252][ T4340] device veth0_vlan entered promiscuous mode [ 77.259677][ T4340] device veth1_vlan entered promiscuous mode [ 77.299556][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 77.308112][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 77.318580][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 77.327965][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 77.340309][ T4340] device veth0_macvtap entered promiscuous mode [ 77.352115][ T4340] device veth1_macvtap entered promiscuous mode [ 77.373269][ T4340] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 77.388096][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 77.398066][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 77.407965][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 77.419136][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 77.439115][ T4340] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 77.457854][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 77.467284][ T403] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 77.480371][ T4340] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.491385][ T4340] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.501080][ T4340] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.511743][ T4340] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.585662][ T403] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.596690][ T403] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.606181][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 77.635911][ T403] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.645275][ T403] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.655893][ T1225] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 77.735194][ T4438] [ 77.737583][ T4438] ====================================================== [ 77.744635][ T4438] WARNING: possible circular locking dependency detected [ 77.751938][ T4438] syzkaller #0 Not tainted [ 77.756380][ T4438] ------------------------------------------------------ [ 77.763425][ T4438] syz.0.17/4438 is trying to acquire lock: [ 77.769257][ T4438] ffff88802aff8c28 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xfa/0x210 [ 77.780567][ T4438] [ 77.780567][ T4438] but task is already holding lock: [ 77.787951][ T4438] ffffffff8d6c51a8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x18b/0x560 [ 77.798604][ T4438] [ 77.798604][ T4438] which lock already depends on the new lock. [ 77.798604][ T4438] [ 77.809309][ T4438] [ 77.809309][ T4438] the existing dependency chain (in reverse order) is: [ 77.818534][ T4438] [ 77.818534][ T4438] -> #4 (rfkill_global_mutex){+.+.}-{3:3}: [ 77.826567][ T4438] __mutex_lock_common+0x1e3/0x2400 [ 77.832488][ T4438] mutex_lock_nested+0x17/0x20 [ 77.837905][ T4438] rfkill_register+0x33/0x8a0 [ 77.843142][ T4438] hci_register_dev+0x452/0x970 [ 77.848548][ T4438] vhci_create_device+0x32c/0x5c0 [ 77.854129][ T4438] vhci_write+0x391/0x450 [ 77.859798][ T4438] vfs_write+0x745/0xd60 [ 77.864604][ T4438] ksys_write+0x152/0x260 [ 77.869571][ T4438] do_syscall_64+0x4c/0xa0 [ 77.874587][ T4438] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 77.881256][ T4438] [ 77.881256][ T4438] -> #3 (&data->open_mutex){+.+.}-{3:3}: [ 77.889114][ T4438] __mutex_lock_common+0x1e3/0x2400 [ 77.894881][ T4438] mutex_lock_nested+0x17/0x20 [ 77.900219][ T4438] vhci_send_frame+0x88/0x100 [ 77.905587][ T4438] hci_send_frame+0x1a9/0x2e0 [ 77.910820][ T4438] hci_tx_work+0x9f9/0x1710 [ 77.916010][ T4438] process_one_work+0x85f/0x1010 [ 77.921510][ T4438] worker_thread+0xaa6/0x1290 [ 77.926741][ T4438] kthread+0x436/0x520 [ 77.931364][ T4438] ret_from_fork+0x1f/0x30 [ 77.936334][ T4438] [ 77.936334][ T4438] -> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}: [ 77.945754][ T4438] __flush_work+0x116/0x210 [ 77.950817][ T4438] hci_dev_do_close+0x1e7/0x1030 [ 77.956319][ T4438] hci_unregister_dev+0x2d7/0x580 [ 77.961899][ T4438] vhci_release+0x73/0xc0 [ 77.966788][ T4438] __fput+0x234/0x930 [ 77.971332][ T4438] task_work_run+0x125/0x1a0 [ 77.976578][ T4438] do_exit+0x626/0x20c0 [ 77.981422][ T4438] do_group_exit+0x12e/0x300 [ 77.986742][ T4438] get_signal+0x6ca/0x12c0 [ 77.991716][ T4438] arch_do_signal_or_restart+0xe7/0x12c0 [ 77.997995][ T4438] exit_to_user_mode_loop+0x9e/0x130 [ 78.003929][ T4438] exit_to_user_mode_prepare+0xee/0x180 [ 78.010026][ T4438] syscall_exit_to_user_mode+0x16/0x40 [ 78.016043][ T4438] do_syscall_64+0x58/0xa0 [ 78.021014][ T4438] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 78.027544][ T4438] [ 78.027544][ T4438] -> #1 (&hdev->req_lock){+.+.}-{3:3}: [ 78.035224][ T4438] __mutex_lock_common+0x1e3/0x2400 [ 78.041073][ T4438] mutex_lock_nested+0x17/0x20 [ 78.046402][ T4438] bg_scan_update+0x44/0x3b0 [ 78.051555][ T4438] process_one_work+0x85f/0x1010 [ 78.057055][ T4438] worker_thread+0xaa6/0x1290 [ 78.062351][ T4438] kthread+0x436/0x520 [ 78.066973][ T4438] ret_from_fork+0x1f/0x30 [ 78.071943][ T4438] [ 78.071943][ T4438] -> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}: [ 78.081890][ T4438] __lock_acquire+0x2c42/0x7d10 [ 78.087301][ T4438] lock_acquire+0x19e/0x400 [ 78.092367][ T4438] __flush_work+0x116/0x210 [ 78.097420][ T4438] __cancel_work_timer+0x3f4/0x560 [ 78.103089][ T4438] hci_request_cancel_all+0xcc/0x300 [ 78.109045][ T4438] hci_dev_do_close+0x4e/0x1030 [ 78.114848][ T4438] hci_rfkill_set_block+0x10a/0x190 [ 78.120897][ T4438] rfkill_set_block+0x1c6/0x420 [ 78.126311][ T4438] rfkill_fop_write+0x2e7/0x560 [ 78.131849][ T4438] vfs_write+0x30b/0xd60 [ 78.136644][ T4438] ksys_write+0x152/0x260 [ 78.141530][ T4438] do_syscall_64+0x4c/0xa0 [ 78.146629][ T4438] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 78.153078][ T4438] [ 78.153078][ T4438] other info that might help us debug this: [ 78.153078][ T4438] [ 78.163330][ T4438] Chain exists of: [ 78.163330][ T4438] (work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex [ 78.163330][ T4438] [ 78.179223][ T4438] Possible unsafe locking scenario: [ 78.179223][ T4438] [ 78.186699][ T4438] CPU0 CPU1 [ 78.192209][ T4438] ---- ---- [ 78.197688][ T4438] lock(rfkill_global_mutex); [ 78.202490][ T4438] lock(&data->open_mutex); [ 78.209758][ T4438] lock(rfkill_global_mutex); [ 78.217080][ T4438] lock((work_completion)(&hdev->bg_scan_update)); [ 78.223706][ T4438] [ 78.223706][ T4438] *** DEADLOCK *** [ 78.223706][ T4438] [ 78.231878][ T4438] 1 lock held by syz.0.17/4438: [ 78.236867][ T4438] #0: ffffffff8d6c51a8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x18b/0x560 [ 78.247018][ T4438] [ 78.247018][ T4438] stack backtrace: [ 78.252929][ T4438] CPU: 0 PID: 4438 Comm: syz.0.17 Not tainted syzkaller #0 [ 78.260161][ T4438] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 78.270480][ T4438] Call Trace: [ 78.273788][ T4438] [ 78.276751][ T4438] dump_stack_lvl+0x188/0x250 [ 78.281638][ T4438] ? load_image+0x400/0x400 [ 78.286172][ T4438] ? show_regs_print_info+0x20/0x20 [ 78.291411][ T4438] ? print_circular_bug+0x12b/0x1a0 [ 78.296645][ T4438] check_noncircular+0x296/0x330 [ 78.301616][ T4438] ? look_up_lock_class+0x71/0x110 [ 78.306766][ T4438] ? add_chain_block+0x940/0x940 [ 78.311818][ T4438] ? lockdep_lock+0xf1/0x1f0 [ 78.316441][ T4438] ? __lock_acquire+0x12e8/0x7d10 [ 78.321594][ T4438] ? mark_lock+0x94/0x320 [ 78.325956][ T4438] __lock_acquire+0x2c42/0x7d10 [ 78.330874][ T4438] ? verify_lock_unused+0x140/0x140 [ 78.336110][ T4438] ? mark_lock+0x94/0x320 [ 78.340477][ T4438] ? verify_lock_unused+0x140/0x140 [ 78.345838][ T4438] lock_acquire+0x19e/0x400 [ 78.350384][ T4438] ? __flush_work+0xfa/0x210 [ 78.355008][ T4438] ? __lock_acquire+0x7d10/0x7d10 [ 78.360071][ T4438] ? read_lock_is_recursive+0x10/0x10 [ 78.365476][ T4438] ? start_flush_work+0x776/0x820 [ 78.370545][ T4438] __flush_work+0x116/0x210 [ 78.375083][ T4438] ? __flush_work+0xfa/0x210 [ 78.379709][ T4438] ? flush_work+0x20/0x20 [ 78.384254][ T4438] ? try_to_grab_pending+0xfa/0x7f0 [ 78.389574][ T4438] ? mark_lock+0x94/0x320 [ 78.394043][ T4438] ? lockdep_hardirqs_on_prepare+0x409/0x770 [ 78.400153][ T4438] ? lock_chain_count+0x20/0x20 [ 78.405045][ T4438] ? mark_lock+0x94/0x320 [ 78.409608][ T4438] ? __cancel_work_timer+0x36a/0x560 [ 78.415023][ T4438] __cancel_work_timer+0x3f4/0x560 [ 78.420176][ T4438] ? cancel_work_sync+0x20/0x20 [ 78.425249][ T4438] ? __cancel_work+0x1f9/0x2e0 [ 78.430061][ T4438] ? lockdep_hardirqs_on+0x94/0x140 [ 78.435302][ T4438] ? __cancel_work+0x27b/0x2e0 [ 78.440101][ T4438] ? cancel_work+0x20/0x20 [ 78.444547][ T4438] ? lock_chain_count+0x20/0x20 [ 78.449540][ T4438] hci_request_cancel_all+0xcc/0x300 [ 78.454864][ T4438] hci_dev_do_close+0x4e/0x1030 [ 78.459871][ T4438] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 78.465874][ T4438] ? _raw_spin_unlock+0x40/0x40 [ 78.470758][ T4438] hci_rfkill_set_block+0x10a/0x190 [ 78.476087][ T4438] ? rcu_lock_release+0x20/0x20 [ 78.480976][ T4438] rfkill_set_block+0x1c6/0x420 [ 78.485973][ T4438] rfkill_fop_write+0x2e7/0x560 [ 78.490864][ T4438] ? rfkill_fop_read+0x4d0/0x4d0 [ 78.496014][ T4438] ? common_file_perm+0x110/0x1c0 [ 78.501075][ T4438] ? fsnotify_perm+0x5d/0x560 [ 78.505883][ T4438] ? security_file_permission+0x75/0xa0 [ 78.511459][ T4438] ? rfkill_fop_read+0x4d0/0x4d0 [ 78.516430][ T4438] vfs_write+0x30b/0xd60 [ 78.520707][ T4438] ? file_end_write+0x250/0x250 [ 78.525603][ T4438] ? __context_tracking_exit+0x4c/0x80 [ 78.531097][ T4438] ? __lock_acquire+0x7d10/0x7d10 [ 78.536250][ T4438] ? __fdget_pos+0x1e2/0x370 [ 78.541078][ T4438] ksys_write+0x152/0x260 [ 78.545529][ T4438] ? __ia32_sys_read+0x80/0x80 [ 78.550416][ T4438] ? lockdep_hardirqs_on+0x94/0x140 [ 78.555746][ T4438] do_syscall_64+0x4c/0xa0 [ 78.560222][ T4438] ? clear_bhb_loop+0x30/0x80 [ 78.565030][ T4438] ? clear_bhb_loop+0x30/0x80 [ 78.569775][ T4438] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 78.575677][ T4438] RIP: 0033:0x7ff3127ab819 [ 78.580266][ T4438] 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 [ 78.600129][ T4438] RSP: 002b:00007ffc1f9411c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 78.608670][ T4438] RAX: ffffffffffffffda RBX: 00007ff312a24fa0 RCX: 00007ff3127ab819 [ 78.616781][ T4438] RDX: 0000000000000008 RSI: 0000200000000100 RDI: 0000000000000003 [ 78.624844][ T4438] RBP: 00007ff312841c91 R08: 0000000000000000 R09: 0000000000000000 [ 78.632943][ T4438] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 78.640932][ T4438] R13: 00007ff312a24fac R14: 00007ff312a24fa0 R15: 00007ff312a24fa0 [ 78.648995][ T4438]