no interfaces have a carrier [ 36.118706][ T3853] 8021q: adding VLAN 0 to HW filter on device bond0 [ 36.134603][ T3853] eql: remember to turn off Van-Jacobson compression on your slave devices Starting crond: OK Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.50' (ED25519) to the list of known hosts. 2026/04/04 08:40:54 parsed 1 programs syzkaller login: [ 60.459349][ T4188] cgroup: Unknown subsys name 'net' [ 60.679922][ T4188] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 62.184282][ T4188] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 65.631690][ T4246] chnl_net:caif_netlink_parms(): no params data found [ 65.638769][ T144] ODEBUG: Out of memory. ODEBUG disabled [ 65.706750][ T4246] bridge0: port 1(bridge_slave_0) entered blocking state [ 65.714488][ T4246] bridge0: port 1(bridge_slave_0) entered disabled state [ 65.722668][ T4246] device bridge_slave_0 entered promiscuous mode [ 65.736517][ T4246] bridge0: port 2(bridge_slave_1) entered blocking state [ 65.745345][ T4246] bridge0: port 2(bridge_slave_1) entered disabled state [ 65.753921][ T4246] device bridge_slave_1 entered promiscuous mode [ 65.797370][ T4246] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 65.819163][ T4246] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 65.848246][ T4246] team0: Port device team_slave_0 added [ 65.860178][ T4246] team0: Port device team_slave_1 added [ 65.898414][ T4246] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 65.905870][ T4246] 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. [ 65.934557][ T4246] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 65.952149][ T4246] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 65.959703][ T4246] 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. [ 65.985929][ T4246] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 66.033972][ T4246] device hsr_slave_0 entered promiscuous mode [ 66.040831][ T4246] device hsr_slave_1 entered promiscuous mode [ 66.138042][ T4246] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 66.147744][ T4246] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 66.158765][ T4246] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 66.167487][ T4246] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 66.228200][ T4246] 8021q: adding VLAN 0 to HW filter on device bond0 [ 66.239566][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 66.250211][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 66.260787][ T4246] 8021q: adding VLAN 0 to HW filter on device team0 [ 66.271424][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 66.280359][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 66.289412][ T4245] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.296819][ T4245] bridge0: port 1(bridge_slave_0) entered forwarding state [ 66.306094][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 66.316884][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 66.325983][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 66.334568][ T9] bridge0: port 2(bridge_slave_1) entered blocking state [ 66.341648][ T9] bridge0: port 2(bridge_slave_1) entered forwarding state [ 66.375338][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 66.387879][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 66.398813][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 66.407765][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 66.416836][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 66.444401][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 66.453050][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 66.465835][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 66.474883][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 66.487468][ T4246] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 66.500431][ T4246] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 66.508997][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 66.613434][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 66.621811][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 66.655486][ T4246] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 66.673099][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 66.713303][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 66.722440][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 66.731129][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 66.742960][ T4246] device veth0_vlan entered promiscuous mode [ 66.773308][ T4246] device veth1_vlan entered promiscuous mode [ 66.790581][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 66.799705][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 66.808664][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 66.820937][ T4246] device veth0_macvtap entered promiscuous mode [ 66.831293][ T4246] device veth1_macvtap entered promiscuous mode [ 66.863426][ T4246] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 66.871487][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 66.880971][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 66.890315][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 66.902532][ T4246] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 66.911655][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 66.920362][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 66.933145][ T4246] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 66.942866][ T4246] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 66.951805][ T4246] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 66.960830][ T4246] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 67.621658][ T4245] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 67.632537][ T4245] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 67.658387][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 67.671630][ T4245] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 67.680300][ T4245] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 67.690798][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2026/04/04 08:41:04 executed programs: 0 [ 68.382112][ T4296] chnl_net:caif_netlink_parms(): no params data found [ 68.446385][ T4296] bridge0: port 1(bridge_slave_0) entered blocking state [ 68.453850][ T4296] bridge0: port 1(bridge_slave_0) entered disabled state [ 68.462378][ T4296] device bridge_slave_0 entered promiscuous mode [ 68.471265][ T4296] bridge0: port 2(bridge_slave_1) entered blocking state [ 68.479050][ T4296] bridge0: port 2(bridge_slave_1) entered disabled state [ 68.488013][ T4296] device bridge_slave_1 entered promiscuous mode [ 68.508888][ T4296] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 68.522708][ T4296] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 68.547207][ T4296] team0: Port device team_slave_0 added [ 68.555592][ T4296] team0: Port device team_slave_1 added [ 68.575316][ T4296] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 68.582319][ T4296] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 68.609574][ T4296] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 68.622865][ T4296] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 68.630587][ T4296] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 68.657340][ T4296] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 68.693977][ T4296] device hsr_slave_0 entered promiscuous mode [ 68.701133][ T4296] device hsr_slave_1 entered promiscuous mode [ 68.708085][ T4296] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 68.716401][ T4296] Cannot create hsr debugfs directory [ 68.792005][ T4296] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 70.274569][ T4272] Bluetooth: hci0: command 0x0409 tx timeout [ 71.475492][ T1428] ieee802154 phy0 wpan0: encryption failed: -22 [ 71.482093][ T1428] ieee802154 phy1 wpan1: encryption failed: -22 [ 71.738805][ T4296] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 71.777493][ T4296] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 71.849987][ T4296] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 71.929913][ T4296] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 71.939340][ T4296] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 71.961716][ T4296] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 71.970673][ T4296] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 72.025852][ T4296] 8021q: adding VLAN 0 to HW filter on device bond0 [ 72.039060][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 72.047350][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 72.066764][ T4296] 8021q: adding VLAN 0 to HW filter on device team0 [ 72.076353][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 72.085594][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 72.094429][ T4245] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.101485][ T4245] bridge0: port 1(bridge_slave_0) entered forwarding state [ 72.120356][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 72.128706][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 72.137845][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 72.146554][ T4245] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.153664][ T4245] bridge0: port 2(bridge_slave_1) entered forwarding state [ 72.164516][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 72.185332][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 72.197529][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 72.206682][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 72.216284][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 72.238165][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 72.248442][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 72.258657][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 72.267522][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 72.288634][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 72.298023][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 72.308417][ T4296] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 72.354029][ T4272] Bluetooth: hci0: command 0x041b tx timeout [ 72.403380][ T400] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 72.411328][ T400] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 72.438003][ T4296] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 72.455852][ T400] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 72.464904][ T400] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 72.488580][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 72.500059][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 72.508905][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 72.517342][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 72.533041][ T4296] device veth0_vlan entered promiscuous mode [ 72.546651][ T4296] device veth1_vlan entered promiscuous mode [ 72.565704][ T400] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 72.574888][ T400] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 72.582886][ T400] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 72.592342][ T400] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 72.608860][ T4296] device veth0_macvtap entered promiscuous mode [ 72.621525][ T144] device hsr_slave_0 left promiscuous mode [ 72.628222][ T144] device hsr_slave_1 left promiscuous mode [ 72.636213][ T144] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 72.644211][ T144] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 72.652234][ T144] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 72.660471][ T144] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 72.668524][ T144] device bridge_slave_1 left promiscuous mode [ 72.675787][ T144] bridge0: port 2(bridge_slave_1) entered disabled state [ 72.687531][ T144] device bridge_slave_0 left promiscuous mode [ 72.694604][ T144] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.709798][ T144] device veth1_macvtap left promiscuous mode [ 72.716400][ T144] device veth0_macvtap left promiscuous mode [ 72.722613][ T144] device veth1_vlan left promiscuous mode [ 72.728571][ T144] device veth0_vlan left promiscuous mode [ 72.854866][ T144] team0 (unregistering): Port device team_slave_1 removed [ 72.866698][ T144] team0 (unregistering): Port device team_slave_0 removed [ 72.879546][ T144] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 72.894018][ T144] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 72.945456][ T144] bond0 (unregistering): Released all slaves [ 73.021838][ T4296] device veth1_macvtap entered promiscuous mode [ 73.040221][ T4296] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 73.048370][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 73.056927][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 73.065503][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 73.074271][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 73.085355][ T4296] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 73.095177][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 73.104207][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 73.114782][ T4296] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.125159][ T4296] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.134274][ T4296] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.143119][ T4296] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.208373][ T400] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 73.218601][ T400] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 73.226902][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 73.252038][ T400] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 73.260195][ T400] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 73.269654][ T4245] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 73.384538][ T4309] [ 73.386918][ T4309] ====================================================== [ 73.393958][ T4309] WARNING: possible circular locking dependency detected [ 73.401155][ T4309] syzkaller #0 Not tainted [ 73.405662][ T4309] ------------------------------------------------------ [ 73.412687][ T4309] syz.0.17/4309 is trying to acquire lock: [ 73.418682][ T4309] ffff8880255dcc28 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xfa/0x210 [ 73.430280][ T4309] [ 73.430280][ T4309] but task is already holding lock: [ 73.437724][ T4309] ffffffff8d6c51a8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x18b/0x560 [ 73.447556][ T4309] [ 73.447556][ T4309] which lock already depends on the new lock. [ 73.447556][ T4309] [ 73.458066][ T4309] [ 73.458066][ T4309] the existing dependency chain (in reverse order) is: [ 73.467071][ T4309] [ 73.467071][ T4309] -> #4 (rfkill_global_mutex){+.+.}-{3:3}: [ 73.475232][ T4309] __mutex_lock_common+0x1e3/0x2400 [ 73.481209][ T4309] mutex_lock_nested+0x17/0x20 [ 73.486669][ T4309] rfkill_register+0x33/0x8a0 [ 73.492126][ T4309] hci_register_dev+0x452/0x970 [ 73.497506][ T4309] vhci_create_device+0x32c/0x5c0 [ 73.503232][ T4309] vhci_write+0x391/0x450 [ 73.508174][ T4309] vfs_write+0x745/0xd60 [ 73.512938][ T4309] ksys_write+0x152/0x260 [ 73.517792][ T4309] do_syscall_64+0x4c/0xa0 [ 73.522735][ T4309] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 73.529239][ T4309] [ 73.529239][ T4309] -> #3 (&data->open_mutex){+.+.}-{3:3}: [ 73.537139][ T4309] __mutex_lock_common+0x1e3/0x2400 [ 73.542860][ T4309] mutex_lock_nested+0x17/0x20 [ 73.548145][ T4309] vhci_send_frame+0x88/0x100 [ 73.553350][ T4309] hci_send_frame+0x1a9/0x2e0 [ 73.558569][ T4309] hci_tx_work+0x9f9/0x1710 [ 73.563628][ T4309] process_one_work+0x85f/0x1010 [ 73.569092][ T4309] worker_thread+0xaa6/0x1290 [ 73.574289][ T4309] kthread+0x436/0x520 [ 73.578886][ T4309] ret_from_fork+0x1f/0x30 [ 73.583905][ T4309] [ 73.583905][ T4309] -> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}: [ 73.593114][ T4309] __flush_work+0x116/0x210 [ 73.598135][ T4309] hci_dev_do_close+0x1e7/0x1030 [ 73.603628][ T4309] hci_unregister_dev+0x2d7/0x580 [ 73.609169][ T4309] vhci_release+0x73/0xc0 [ 73.614022][ T4309] __fput+0x234/0x930 [ 73.618546][ T4309] task_work_run+0x125/0x1a0 [ 73.623675][ T4309] do_exit+0x626/0x20c0 [ 73.628358][ T4309] do_group_exit+0x12e/0x300 [ 73.633556][ T4309] get_signal+0x6ca/0x12c0 [ 73.638493][ T4309] arch_do_signal_or_restart+0xe7/0x12c0 [ 73.644824][ T4309] exit_to_user_mode_loop+0x9e/0x130 [ 73.650627][ T4309] exit_to_user_mode_prepare+0xee/0x180 [ 73.656712][ T4309] syscall_exit_to_user_mode+0x16/0x40 [ 73.663080][ T4309] do_syscall_64+0x58/0xa0 [ 73.668026][ T4309] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 73.674544][ T4309] [ 73.674544][ T4309] -> #1 (&hdev->req_lock){+.+.}-{3:3}: [ 73.682190][ T4309] __mutex_lock_common+0x1e3/0x2400 [ 73.687914][ T4309] mutex_lock_nested+0x17/0x20 [ 73.693335][ T4309] bg_scan_update+0x44/0x3b0 [ 73.698533][ T4309] process_one_work+0x85f/0x1010 [ 73.704204][ T4309] worker_thread+0xaa6/0x1290 [ 73.709401][ T4309] kthread+0x436/0x520 [ 73.714073][ T4309] ret_from_fork+0x1f/0x30 [ 73.719012][ T4309] [ 73.719012][ T4309] -> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}: [ 73.729097][ T4309] __lock_acquire+0x2c42/0x7d10 [ 73.734667][ T4309] lock_acquire+0x19e/0x400 [ 73.739790][ T4309] __flush_work+0x116/0x210 [ 73.744999][ T4309] __cancel_work_timer+0x3f4/0x560 [ 73.750626][ T4309] hci_request_cancel_all+0xcc/0x300 [ 73.756516][ T4309] hci_dev_do_close+0x4e/0x1030 [ 73.761887][ T4309] hci_rfkill_set_block+0x10a/0x190 [ 73.767695][ T4309] rfkill_set_block+0x1c6/0x420 [ 73.773169][ T4309] rfkill_fop_write+0x452/0x560 [ 73.778540][ T4309] vfs_write+0x30b/0xd60 [ 73.783395][ T4309] ksys_write+0x152/0x260 [ 73.788426][ T4309] do_syscall_64+0x4c/0xa0 [ 73.793375][ T4309] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 73.799792][ T4309] [ 73.799792][ T4309] other info that might help us debug this: [ 73.799792][ T4309] [ 73.810147][ T4309] Chain exists of: [ 73.810147][ T4309] (work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex [ 73.810147][ T4309] [ 73.826680][ T4309] Possible unsafe locking scenario: [ 73.826680][ T4309] [ 73.834265][ T4309] CPU0 CPU1 [ 73.839676][ T4309] ---- ---- [ 73.845220][ T4309] lock(rfkill_global_mutex); [ 73.849984][ T4309] lock(&data->open_mutex); [ 73.857087][ T4309] lock(rfkill_global_mutex); [ 73.864452][ T4309] lock((work_completion)(&hdev->bg_scan_update)); [ 73.871036][ T4309] [ 73.871036][ T4309] *** DEADLOCK *** [ 73.871036][ T4309] [ 73.879375][ T4309] 1 lock held by syz.0.17/4309: [ 73.884234][ T4309] #0: ffffffff8d6c51a8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x18b/0x560 [ 73.894508][ T4309] [ 73.894508][ T4309] stack backtrace: [ 73.900406][ T4309] CPU: 1 PID: 4309 Comm: syz.0.17 Not tainted syzkaller #0 [ 73.907617][ T4309] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 [ 73.917765][ T4309] Call Trace: [ 73.921154][ T4309] [ 73.924118][ T4309] dump_stack_lvl+0x188/0x250 [ 73.928796][ T4309] ? load_image+0x400/0x400 [ 73.933304][ T4309] ? show_regs_print_info+0x20/0x20 [ 73.938733][ T4309] ? print_circular_bug+0x12b/0x1a0 [ 73.944044][ T4309] check_noncircular+0x296/0x330 [ 73.949003][ T4309] ? look_up_lock_class+0x71/0x110 [ 73.954122][ T4309] ? add_chain_block+0x940/0x940 [ 73.959058][ T4309] ? lockdep_lock+0xf1/0x1f0 [ 73.963652][ T4309] ? __lock_acquire+0x12e8/0x7d10 [ 73.968695][ T4309] ? mark_lock+0x94/0x320 [ 73.973022][ T4309] ? _find_first_zero_bit+0xce/0xf0 [ 73.978308][ T4309] __lock_acquire+0x2c42/0x7d10 [ 73.983262][ T4309] ? rcu_lock_release+0x5/0x20 [ 73.988132][ T4309] ? verify_lock_unused+0x140/0x140 [ 73.993332][ T4309] ? mark_lock+0x94/0x320 [ 73.997752][ T4309] lock_acquire+0x19e/0x400 [ 74.002253][ T4309] ? __flush_work+0xfa/0x210 [ 74.006844][ T4309] ? __lock_acquire+0x7d10/0x7d10 [ 74.011884][ T4309] ? read_lock_is_recursive+0x10/0x10 [ 74.017341][ T4309] ? start_flush_work+0x776/0x820 [ 74.022364][ T4309] __flush_work+0x116/0x210 [ 74.026863][ T4309] ? __flush_work+0xfa/0x210 [ 74.031451][ T4309] ? flush_work+0x20/0x20 [ 74.035781][ T4309] ? try_to_grab_pending+0xfa/0x7f0 [ 74.040980][ T4309] ? mark_lock+0x94/0x320 [ 74.045416][ T4309] ? lockdep_hardirqs_on_prepare+0x409/0x770 [ 74.051496][ T4309] ? lock_chain_count+0x20/0x20 [ 74.056348][ T4309] ? mark_lock+0x94/0x320 [ 74.060851][ T4309] ? __cancel_work_timer+0x36a/0x560 [ 74.066223][ T4309] __cancel_work_timer+0x3f4/0x560 [ 74.071422][ T4309] ? cancel_work_sync+0x20/0x20 [ 74.076287][ T4309] ? __cancel_work+0x1f9/0x2e0 [ 74.081059][ T4309] ? lockdep_hardirqs_on+0x94/0x140 [ 74.086290][ T4309] ? __cancel_work+0x27b/0x2e0 [ 74.091169][ T4309] ? cancel_work+0x20/0x20 [ 74.095587][ T4309] ? lock_chain_count+0x20/0x20 [ 74.100445][ T4309] hci_request_cancel_all+0xcc/0x300 [ 74.105828][ T4309] hci_dev_do_close+0x4e/0x1030 [ 74.110766][ T4309] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 74.116657][ T4309] ? _raw_spin_unlock+0x40/0x40 [ 74.121517][ T4309] hci_rfkill_set_block+0x10a/0x190 [ 74.126711][ T4309] ? rcu_lock_release+0x20/0x20 [ 74.131561][ T4309] rfkill_set_block+0x1c6/0x420 [ 74.136409][ T4309] rfkill_fop_write+0x452/0x560 [ 74.141257][ T4309] ? rfkill_fop_read+0x4d0/0x4d0 [ 74.146197][ T4309] ? common_file_perm+0x110/0x1c0 [ 74.151314][ T4309] ? fsnotify_perm+0x5d/0x560 [ 74.155997][ T4309] ? security_file_permission+0x75/0xa0 [ 74.161562][ T4309] ? rfkill_fop_read+0x4d0/0x4d0 [ 74.166584][ T4309] vfs_write+0x30b/0xd60 [ 74.171098][ T4309] ? file_end_write+0x250/0x250 [ 74.176031][ T4309] ? __context_tracking_exit+0x4c/0x80 [ 74.181664][ T4309] ? __lock_acquire+0x7d10/0x7d10 [ 74.186688][ T4309] ? __fdget_pos+0x1e2/0x370 [ 74.191283][ T4309] ksys_write+0x152/0x260 [ 74.195608][ T4309] ? __ia32_sys_read+0x80/0x80 [ 74.200456][ T4309] ? lockdep_hardirqs_on+0x94/0x140 [ 74.205654][ T4309] do_syscall_64+0x4c/0xa0 [ 74.210067][ T4309] ? clear_bhb_loop+0x30/0x80 [ 74.214752][ T4309] ? clear_bhb_loop+0x30/0x80 [ 74.219513][ T4309] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 74.225443][ T4309] RIP: 0033:0x7f382c506819 [ 74.230064][ T4309] 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 [ 74.249757][ T4309] RSP: 002b:00007ffd9e9a1b58 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 74.258187][ T4309] RAX: ffffffffffffffda RBX: 00007f382c77ffa0 RCX: 00007f382c506819 [ 74.266154][ T4309] RDX: 0000000000000008 RSI: 00002000000000c0 RDI: 0000000000000003 [ 74.274207][ T4309] RBP: 00007f382c59cc91 R08: 0000000000000000 R09: 0000000000000000 [ 74.282176][ T4309] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 74.290840][ T4309] R13: 00007f382c77ffac R14: 00007f382c77ffa0 R15: 00007f382c77ffa0 [ 74.298902][ T4309]