Warning: Permanently added '10.128.0.200' (ED25519) to the list of known hosts. 2026/05/14 08:31:41 parsed 1 programs syzkaller login: [ 66.073074][ T4200] cgroup: Unknown subsys name 'net' [ 66.205819][ T4200] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 67.741986][ T4200] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 69.716081][ T155] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 69.724304][ T155] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 69.734585][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 69.757029][ T1281] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 69.765935][ T1281] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 69.775467][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 70.325028][ T4244] chnl_net:caif_netlink_parms(): no params data found [ 70.392978][ T4244] bridge0: port 1(bridge_slave_0) entered blocking state [ 70.400944][ T4244] bridge0: port 1(bridge_slave_0) entered disabled state [ 70.409361][ T4244] device bridge_slave_0 entered promiscuous mode [ 70.420563][ T4244] bridge0: port 2(bridge_slave_1) entered blocking state [ 70.427955][ T4244] bridge0: port 2(bridge_slave_1) entered disabled state [ 70.436179][ T4244] device bridge_slave_1 entered promiscuous mode [ 70.463131][ T4244] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 70.475037][ T4244] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 70.503979][ T4244] team0: Port device team_slave_0 added [ 70.512266][ T4244] team0: Port device team_slave_1 added [ 70.545327][ T4244] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 70.552811][ T4244] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 70.581210][ T4244] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 70.595627][ T4244] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 70.604516][ T4244] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 70.632388][ T4244] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 70.676360][ T4244] device hsr_slave_0 entered promiscuous mode [ 70.684053][ T4244] device hsr_slave_1 entered promiscuous mode [ 70.849768][ T4244] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 70.864581][ T4244] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 70.876702][ T4244] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 70.888267][ T4244] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 70.973002][ T4244] 8021q: adding VLAN 0 to HW filter on device bond0 [ 70.991782][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 71.001093][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 71.025779][ T4244] 8021q: adding VLAN 0 to HW filter on device team0 [ 71.037569][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 71.046347][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 71.055476][ T155] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.062760][ T155] bridge0: port 1(bridge_slave_0) entered forwarding state [ 71.073994][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 71.084544][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 71.093896][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 71.102427][ T155] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.109554][ T155] bridge0: port 2(bridge_slave_1) entered forwarding state [ 71.121760][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 71.134565][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 71.148125][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 71.165249][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 71.201947][ T4244] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 71.213665][ T4244] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 71.227044][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 71.235288][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 71.246711][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 71.256266][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 71.265269][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 71.275901][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 71.285366][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 71.299358][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 71.403633][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 71.415622][ T1433] ieee802154 phy0 wpan0: encryption failed: -22 [ 71.415862][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 71.422152][ T1433] ieee802154 phy1 wpan1: encryption failed: -22 [ 71.435327][ T4244] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 71.456023][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 71.465265][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 71.485188][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 71.493588][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 71.503715][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 71.512439][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 71.523149][ T4244] device veth0_vlan entered promiscuous mode [ 71.536121][ T4244] device veth1_vlan entered promiscuous mode [ 71.554152][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 71.563333][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 71.572621][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 71.584216][ T4244] device veth0_macvtap entered promiscuous mode [ 71.594232][ T4244] device veth1_macvtap entered promiscuous mode [ 71.609107][ T4244] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 71.618259][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 71.626869][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 71.635801][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 71.646954][ T4244] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 71.661759][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 71.671341][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 71.699687][ T4244] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.709028][ T4244] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.718573][ T4244] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.728374][ T4244] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.825250][ T4244] syz-executor (4244) used greatest stack depth: 21136 bytes left 2026/05/14 08:31:50 executed programs: 0 [ 73.732178][ T4302] chnl_net:caif_netlink_parms(): no params data found [ 73.793596][ T4302] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.800826][ T4302] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.809147][ T4302] device bridge_slave_0 entered promiscuous mode [ 73.819784][ T4302] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.827283][ T4302] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.835908][ T4302] device bridge_slave_1 entered promiscuous mode [ 73.862003][ T4302] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 73.874901][ T4302] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 73.903671][ T4302] team0: Port device team_slave_0 added [ 73.911910][ T4302] team0: Port device team_slave_1 added [ 73.935101][ T4302] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 73.942223][ T4302] 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. [ 73.968598][ T4302] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 73.982032][ T4302] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 73.989111][ T4302] 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. [ 74.015634][ T4302] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 74.053053][ T4302] device hsr_slave_0 entered promiscuous mode [ 74.061075][ T4302] device hsr_slave_1 entered promiscuous mode [ 74.068600][ T4302] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 74.077160][ T4302] Cannot create hsr debugfs directory [ 74.162885][ T4302] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 75.650809][ T4322] Bluetooth: hci0: command 0x0409 tx timeout [ 76.356063][ T4302] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 76.405841][ T4302] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 76.477701][ T4302] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 76.607983][ T4302] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 76.619331][ T4302] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 76.639801][ T4302] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 76.649215][ T4302] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 76.734282][ T4302] 8021q: adding VLAN 0 to HW filter on device bond0 [ 76.745743][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 76.754686][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 76.765422][ T4302] 8021q: adding VLAN 0 to HW filter on device team0 [ 76.793455][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 76.802605][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 76.811155][ T1281] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.818359][ T1281] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.826733][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 76.867877][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 76.877232][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 76.886257][ T1281] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.893541][ T1281] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.902634][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 76.912410][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 76.921886][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 76.932744][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 76.941876][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 76.951320][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 76.959918][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 76.968197][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 76.976942][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 76.985755][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 76.995823][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 77.007127][ T4302] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 77.023946][ T9] device hsr_slave_0 left promiscuous mode [ 77.031500][ T9] device hsr_slave_1 left promiscuous mode [ 77.038856][ T9] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 77.047804][ T9] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 77.056842][ T9] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 77.065211][ T9] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 77.073378][ T9] device bridge_slave_1 left promiscuous mode [ 77.080392][ T9] bridge0: port 2(bridge_slave_1) entered disabled state [ 77.094135][ T9] device bridge_slave_0 left promiscuous mode [ 77.100651][ T9] bridge0: port 1(bridge_slave_0) entered disabled state [ 77.116533][ T9] device veth1_macvtap left promiscuous mode [ 77.123710][ T9] device veth0_macvtap left promiscuous mode [ 77.129766][ T9] device veth1_vlan left promiscuous mode [ 77.137124][ T9] device veth0_vlan left promiscuous mode [ 77.288795][ T9] team0 (unregistering): Port device team_slave_1 removed [ 77.303224][ T9] team0 (unregistering): Port device team_slave_0 removed [ 77.315865][ T9] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 77.329557][ T9] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 77.385326][ T9] bond0 (unregistering): Released all slaves [ 77.517993][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 77.526331][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 77.541512][ T4302] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 77.569346][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 77.579090][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 77.597629][ T4302] device veth0_vlan entered promiscuous mode [ 77.605288][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 77.614360][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 77.624205][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 77.632258][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 77.643745][ T4302] device veth1_vlan entered promiscuous mode [ 77.674583][ T4302] device veth0_macvtap entered promiscuous mode [ 77.687777][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 77.697185][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 77.705889][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 77.715484][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 77.724378][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 77.732053][ T4322] Bluetooth: hci0: command 0x041b tx timeout [ 77.735196][ T4302] device veth1_macvtap entered promiscuous mode [ 77.757588][ T4302] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 77.767121][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 77.775314][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 77.784218][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 77.796009][ T4302] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 77.805765][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 77.815198][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 77.827832][ T4302] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.837573][ T4302] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.846776][ T4302] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.855578][ T4302] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.912915][ T1281] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.928623][ T1281] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.954315][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 77.965158][ T1281] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.974242][ T1281] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.982178][ T1281] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 78.123251][ T4327] [ 78.125625][ T4327] ====================================================== [ 78.132658][ T4327] WARNING: possible circular locking dependency detected [ 78.139690][ T4327] syzkaller #0 Not tainted [ 78.144172][ T4327] ------------------------------------------------------ [ 78.151196][ T4327] syz.0.17/4327 is trying to acquire lock: [ 78.157774][ T4327] ffff888026dbcc28 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xfa/0x210 [ 78.169452][ T4327] [ 78.169452][ T4327] but task is already holding lock: [ 78.176919][ T4327] ffffffff8d6c5da8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x18b/0x560 [ 78.186727][ T4327] [ 78.186727][ T4327] which lock already depends on the new lock. [ 78.186727][ T4327] [ 78.197387][ T4327] [ 78.197387][ T4327] the existing dependency chain (in reverse order) is: [ 78.206506][ T4327] [ 78.206506][ T4327] -> #4 (rfkill_global_mutex){+.+.}-{3:3}: [ 78.214526][ T4327] __mutex_lock_common+0x1e3/0x2400 [ 78.220277][ T4327] mutex_lock_nested+0x17/0x20 [ 78.225595][ T4327] rfkill_register+0x33/0x980 [ 78.231087][ T4327] hci_register_dev+0x452/0x970 [ 78.236475][ T4327] vhci_create_device+0x32c/0x5c0 [ 78.242032][ T4327] vhci_write+0x391/0x450 [ 78.246894][ T4327] vfs_write+0x745/0xd60 [ 78.251667][ T4327] ksys_write+0x152/0x260 [ 78.256536][ T4327] do_syscall_64+0x4c/0xa0 [ 78.261486][ T4327] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 78.268013][ T4327] [ 78.268013][ T4327] -> #3 (&data->open_mutex){+.+.}-{3:3}: [ 78.275941][ T4327] __mutex_lock_common+0x1e3/0x2400 [ 78.281685][ T4327] mutex_lock_nested+0x17/0x20 [ 78.286995][ T4327] vhci_send_frame+0x88/0x100 [ 78.292210][ T4327] hci_send_frame+0x1a9/0x2e0 [ 78.297438][ T4327] hci_tx_work+0x9f9/0x1710 [ 78.302486][ T4327] process_one_work+0x85f/0x1010 [ 78.308235][ T4327] worker_thread+0xaa6/0x1290 [ 78.313553][ T4327] kthread+0x436/0x520 [ 78.318256][ T4327] ret_from_fork+0x1f/0x30 [ 78.323308][ T4327] [ 78.323308][ T4327] -> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}: [ 78.332609][ T4327] __flush_work+0x116/0x210 [ 78.337650][ T4327] hci_dev_do_close+0x1e7/0x1030 [ 78.343130][ T4327] hci_unregister_dev+0x2d7/0x580 [ 78.348690][ T4327] vhci_release+0x73/0xc0 [ 78.354069][ T4327] __fput+0x234/0x930 [ 78.358752][ T4327] task_work_run+0x125/0x1a0 [ 78.363868][ T4327] do_exit+0x626/0x20c0 [ 78.368545][ T4327] do_group_exit+0x12e/0x300 [ 78.373655][ T4327] get_signal+0x6ca/0x12c0 [ 78.378588][ T4327] arch_do_signal_or_restart+0xe7/0x12c0 [ 78.384860][ T4327] exit_to_user_mode_loop+0x9e/0x130 [ 78.390764][ T4327] exit_to_user_mode_prepare+0xee/0x180 [ 78.396828][ T4327] syscall_exit_to_user_mode+0x16/0x40 [ 78.403161][ T4327] do_syscall_64+0x58/0xa0 [ 78.408410][ T4327] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 78.415011][ T4327] [ 78.415011][ T4327] -> #1 (&hdev->req_lock){+.+.}-{3:3}: [ 78.422760][ T4327] __mutex_lock_common+0x1e3/0x2400 [ 78.428488][ T4327] mutex_lock_nested+0x17/0x20 [ 78.433773][ T4327] bg_scan_update+0x44/0x3b0 [ 78.438886][ T4327] process_one_work+0x85f/0x1010 [ 78.444350][ T4327] worker_thread+0xaa6/0x1290 [ 78.449542][ T4327] kthread+0x436/0x520 [ 78.454130][ T4327] ret_from_fork+0x1f/0x30 [ 78.459178][ T4327] [ 78.459178][ T4327] -> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}: [ 78.469211][ T4327] __lock_acquire+0x2c42/0x7d10 [ 78.474702][ T4327] lock_acquire+0x19e/0x400 [ 78.479730][ T4327] __flush_work+0x116/0x210 [ 78.484756][ T4327] __cancel_work_timer+0x3f4/0x560 [ 78.490572][ T4327] hci_request_cancel_all+0xcc/0x300 [ 78.496388][ T4327] hci_dev_do_close+0x4e/0x1030 [ 78.502042][ T4327] hci_rfkill_set_block+0x10a/0x190 [ 78.507762][ T4327] rfkill_set_block+0x1c9/0x3d0 [ 78.513138][ T4327] rfkill_fop_write+0x452/0x560 [ 78.518692][ T4327] vfs_write+0x30b/0xd60 [ 78.523677][ T4327] ksys_write+0x152/0x260 [ 78.528724][ T4327] do_syscall_64+0x4c/0xa0 [ 78.533746][ T4327] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 78.540262][ T4327] [ 78.540262][ T4327] other info that might help us debug this: [ 78.540262][ T4327] [ 78.550584][ T4327] Chain exists of: [ 78.550584][ T4327] (work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex [ 78.550584][ T4327] [ 78.566671][ T4327] Possible unsafe locking scenario: [ 78.566671][ T4327] [ 78.574125][ T4327] CPU0 CPU1 [ 78.579493][ T4327] ---- ---- [ 78.585027][ T4327] lock(rfkill_global_mutex); [ 78.589863][ T4327] lock(&data->open_mutex); [ 78.597312][ T4327] lock(rfkill_global_mutex); [ 78.604723][ T4327] lock((work_completion)(&hdev->bg_scan_update)); [ 78.611327][ T4327] [ 78.611327][ T4327] *** DEADLOCK *** [ 78.611327][ T4327] [ 78.619474][ T4327] 1 lock held by syz.0.17/4327: [ 78.624325][ T4327] #0: ffffffff8d6c5da8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x18b/0x560 [ 78.634452][ T4327] [ 78.634452][ T4327] stack backtrace: [ 78.640700][ T4327] CPU: 1 PID: 4327 Comm: syz.0.17 Not tainted syzkaller #0 [ 78.647900][ T4327] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 [ 78.658038][ T4327] Call Trace: [ 78.661438][ T4327] [ 78.664411][ T4327] dump_stack_lvl+0x188/0x250 [ 78.669219][ T4327] ? load_image+0x400/0x400 [ 78.673740][ T4327] ? show_regs_print_info+0x20/0x20 [ 78.679131][ T4327] ? print_circular_bug+0x12b/0x1a0 [ 78.684432][ T4327] check_noncircular+0x296/0x330 [ 78.689484][ T4327] ? look_up_lock_class+0x71/0x110 [ 78.694697][ T4327] ? add_chain_block+0x940/0x940 [ 78.699648][ T4327] ? lockdep_lock+0xf1/0x1f0 [ 78.704252][ T4327] ? __lock_acquire+0x12e8/0x7d10 [ 78.709275][ T4327] ? mark_lock+0x94/0x320 [ 78.713644][ T4327] __lock_acquire+0x2c42/0x7d10 [ 78.718512][ T4327] ? verify_lock_unused+0x140/0x140 [ 78.724147][ T4327] ? verify_lock_unused+0x140/0x140 [ 78.729434][ T4327] ? mark_lock+0x94/0x320 [ 78.734119][ T4327] lock_acquire+0x19e/0x400 [ 78.738644][ T4327] ? __flush_work+0xfa/0x210 [ 78.743239][ T4327] ? __lock_acquire+0x7d10/0x7d10 [ 78.748272][ T4327] ? read_lock_is_recursive+0x10/0x10 [ 78.753769][ T4327] ? start_flush_work+0x776/0x820 [ 78.758809][ T4327] __flush_work+0x116/0x210 [ 78.763313][ T4327] ? __flush_work+0xfa/0x210 [ 78.767912][ T4327] ? flush_work+0x20/0x20 [ 78.772244][ T4327] ? try_to_grab_pending+0xfa/0x7f0 [ 78.777447][ T4327] ? mark_lock+0x94/0x320 [ 78.781776][ T4327] ? lockdep_hardirqs_on_prepare+0x409/0x770 [ 78.788150][ T4327] ? lock_chain_count+0x20/0x20 [ 78.793151][ T4327] ? mark_lock+0x94/0x320 [ 78.798328][ T4327] ? __cancel_work_timer+0x36a/0x560 [ 78.803622][ T4327] __cancel_work_timer+0x3f4/0x560 [ 78.809105][ T4327] ? cancel_work_sync+0x20/0x20 [ 78.814004][ T4327] ? __cancel_work+0x1f9/0x2e0 [ 78.818777][ T4327] ? lockdep_hardirqs_on+0x94/0x140 [ 78.824152][ T4327] ? __cancel_work+0x27b/0x2e0 [ 78.828918][ T4327] ? cancel_work+0x20/0x20 [ 78.833434][ T4327] ? lock_chain_count+0x20/0x20 [ 78.838289][ T4327] hci_request_cancel_all+0xcc/0x300 [ 78.843582][ T4327] hci_dev_do_close+0x4e/0x1030 [ 78.848520][ T4327] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 78.854512][ T4327] ? _raw_spin_unlock+0x40/0x40 [ 78.859568][ T4327] hci_rfkill_set_block+0x10a/0x190 [ 78.864901][ T4327] ? rcu_lock_release+0x20/0x20 [ 78.869766][ T4327] rfkill_set_block+0x1c9/0x3d0 [ 78.874626][ T4327] rfkill_fop_write+0x452/0x560 [ 78.879655][ T4327] ? rfkill_fop_read+0x520/0x520 [ 78.884763][ T4327] ? common_file_perm+0x140/0x1c0 [ 78.889792][ T4327] ? fsnotify_perm+0x5d/0x560 [ 78.894557][ T4327] ? security_file_permission+0x75/0xa0 [ 78.900195][ T4327] ? rfkill_fop_read+0x520/0x520 [ 78.905165][ T4327] vfs_write+0x30b/0xd60 [ 78.909406][ T4327] ? file_end_write+0x250/0x250 [ 78.914273][ T4327] ? __context_tracking_exit+0x4c/0x80 [ 78.919733][ T4327] ? __lock_acquire+0x7d10/0x7d10 [ 78.924756][ T4327] ? __fdget_pos+0x1e2/0x370 [ 78.929344][ T4327] ksys_write+0x152/0x260 [ 78.933672][ T4327] ? __ia32_sys_read+0x80/0x80 [ 78.938533][ T4327] ? lockdep_hardirqs_on+0x94/0x140 [ 78.944035][ T4327] do_syscall_64+0x4c/0xa0 [ 78.948545][ T4327] ? clear_bhb_loop+0x30/0x80 [ 78.953322][ T4327] ? clear_bhb_loop+0x30/0x80 [ 78.958130][ T4327] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 78.964120][ T4327] RIP: 0033:0x7f3a447f1e59 [ 78.968622][ T4327] 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 [ 78.988315][ T4327] RSP: 002b:00007fff186d21b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 78.996922][ T4327] RAX: ffffffffffffffda RBX: 00007f3a44a6afa0 RCX: 00007f3a447f1e59 [ 79.004905][ T4327] RDX: 0000000000000008 RSI: 00002000000003c0 RDI: 0000000000000003 [ 79.012968][ T4327] RBP: 00007f3a44887d6f R08: 0000000000000000 R09: 0000000000000000 [ 79.020939][ T4327] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 79.029121][ T4327] R13: 00007f3a44a6afac R14: 00007f3a44a6afa0 R15: 00007f3a44a6afa0 [ 79.037182][ T4327]