Warning: Permanently added '10.128.1.34' (ED25519) to the list of known hosts. 2026/04/26 00:39:03 parsed 1 programs syzkaller login: [ 69.306330][ T4188] cgroup: Unknown subsys name 'net' [ 69.442003][ T4188] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 70.972226][ T4188] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 71.354944][ T1423] ieee802154 phy0 wpan0: encryption failed: -22 [ 71.361501][ T1423] ieee802154 phy1 wpan1: encryption failed: -22 [ 72.619647][ T4201] chnl_net:caif_netlink_parms(): no params data found [ 72.672258][ T4201] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.680034][ T4201] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.688368][ T4201] device bridge_slave_0 entered promiscuous mode [ 72.697755][ T4201] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.705781][ T4201] bridge0: port 2(bridge_slave_1) entered disabled state [ 72.714059][ T4201] device bridge_slave_1 entered promiscuous mode [ 72.737980][ T4201] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 72.749058][ T4201] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 72.780936][ T4201] team0: Port device team_slave_0 added [ 72.788785][ T4201] team0: Port device team_slave_1 added [ 72.806377][ T4201] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 72.814189][ T4201] 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. [ 72.840249][ T4201] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 72.856417][ T4201] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 72.863433][ T4201] 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. [ 72.889578][ T4201] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 72.921138][ T4201] device hsr_slave_0 entered promiscuous mode [ 72.928584][ T4201] device hsr_slave_1 entered promiscuous mode [ 73.033611][ T4201] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 73.045624][ T4201] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 73.056338][ T4201] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 73.066637][ T4201] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 73.093088][ T4201] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.100596][ T4201] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.109022][ T4201] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.116156][ T4201] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.167570][ T4201] 8021q: adding VLAN 0 to HW filter on device bond0 [ 73.183843][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 73.196556][ T155] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.208946][ T155] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.217792][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 73.233042][ T4201] 8021q: adding VLAN 0 to HW filter on device team0 [ 73.254271][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 73.263207][ T9] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.270309][ T9] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.280050][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 73.289063][ T9] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.296204][ T9] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.324390][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 73.334967][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 73.345287][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 73.356334][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 73.371877][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 73.381204][ T4201] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 73.520856][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 73.529262][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 73.544879][ T4201] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 73.568514][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 73.592977][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 73.603514][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 73.611893][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 73.623126][ T4201] device veth0_vlan entered promiscuous mode [ 73.639185][ T4201] device veth1_vlan entered promiscuous mode [ 73.667748][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 73.687124][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 73.698527][ T4201] device veth0_macvtap entered promiscuous mode [ 73.710274][ T4201] device veth1_macvtap entered promiscuous mode [ 73.731992][ T4201] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 73.739762][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 73.751861][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 73.760103][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 73.769567][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 73.782784][ T4201] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 73.792366][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 73.802346][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 73.813938][ T4201] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.824729][ T4201] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.834944][ T4201] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.844858][ T4201] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.988200][ T4201] syz-executor (4201) used greatest stack depth: 19160 bytes left [ 74.607604][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.620093][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.631068][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 74.660795][ T154] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.670750][ T154] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.680733][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 74.924708][ T1256] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 2026/04/26 00:39:12 executed programs: 0 [ 76.664150][ T4280] chnl_net:caif_netlink_parms(): no params data found [ 76.709418][ T4280] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.717221][ T4280] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.725372][ T4280] device bridge_slave_0 entered promiscuous mode [ 76.733889][ T4280] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.741010][ T4280] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.749370][ T4280] device bridge_slave_1 entered promiscuous mode [ 76.770528][ T4280] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 76.782292][ T4280] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 76.806445][ T4280] team0: Port device team_slave_0 added [ 76.814740][ T4280] team0: Port device team_slave_1 added [ 76.832502][ T4280] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 76.839495][ T4280] 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. [ 76.865921][ T4280] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 76.878278][ T4280] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 76.885507][ T4280] 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. [ 76.911677][ T4280] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 76.941905][ T4280] device hsr_slave_0 entered promiscuous mode [ 76.949208][ T4280] device hsr_slave_1 entered promiscuous mode [ 76.956149][ T4280] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 76.964492][ T4280] Cannot create hsr debugfs directory [ 77.437588][ T1256] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 78.518073][ T1256] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 78.559809][ T1256] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 78.634379][ T13] Bluetooth: hci0: command 0x0409 tx timeout [ 79.439472][ T4280] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 79.451315][ T4280] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 79.476424][ T4280] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 79.485608][ T4280] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 79.554207][ T4280] 8021q: adding VLAN 0 to HW filter on device bond0 [ 79.579106][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 79.587872][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 79.598887][ T4280] 8021q: adding VLAN 0 to HW filter on device team0 [ 79.611763][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 79.620494][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 79.630243][ T9] bridge0: port 1(bridge_slave_0) entered blocking state [ 79.637436][ T9] bridge0: port 1(bridge_slave_0) entered forwarding state [ 79.647448][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 79.669494][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 79.678675][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 79.687929][ T9] bridge0: port 2(bridge_slave_1) entered blocking state [ 79.695189][ T9] bridge0: port 2(bridge_slave_1) entered forwarding state [ 79.705922][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 79.737670][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 79.749917][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 79.763157][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 79.772240][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 79.783759][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 79.792862][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 79.819959][ T4280] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 79.830892][ T4280] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 79.847406][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 79.857670][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 79.867109][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 79.875631][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 79.884330][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 79.987238][ T1256] device hsr_slave_0 left promiscuous mode [ 79.998505][ T1256] device hsr_slave_1 left promiscuous mode [ 80.005986][ T1256] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 80.013527][ T1256] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 80.023531][ T1256] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 80.030967][ T1256] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 80.039090][ T1256] device bridge_slave_1 left promiscuous mode [ 80.046116][ T1256] bridge0: port 2(bridge_slave_1) entered disabled state [ 80.059881][ T1256] device bridge_slave_0 left promiscuous mode [ 80.066313][ T1256] bridge0: port 1(bridge_slave_0) entered disabled state [ 80.085068][ T1256] device veth1_macvtap left promiscuous mode [ 80.091828][ T1256] device veth0_macvtap left promiscuous mode [ 80.097918][ T1256] device veth1_vlan left promiscuous mode [ 80.105205][ T1256] device veth0_vlan left promiscuous mode [ 80.277819][ T1256] team0 (unregistering): Port device team_slave_1 removed [ 80.292805][ T1256] team0 (unregistering): Port device team_slave_0 removed [ 80.307058][ T1256] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 80.326339][ T1256] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 80.384608][ T1256] bond0 (unregistering): Released all slaves [ 80.445509][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 80.453316][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 80.465737][ T4280] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 80.495592][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 80.506952][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 80.523271][ T4280] device veth0_vlan entered promiscuous mode [ 80.531114][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 80.542560][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 80.551989][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 80.560324][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 80.572410][ T4280] device veth1_vlan entered promiscuous mode [ 80.583463][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 80.592377][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 80.609887][ T4280] device veth0_macvtap entered promiscuous mode [ 80.618248][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 80.629961][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 80.644837][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 80.655796][ T4280] device veth1_macvtap entered promiscuous mode [ 80.676724][ T4280] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 80.685320][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 80.693820][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 80.702886][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 80.711857][ T4293] Bluetooth: hci0: command 0x041b tx timeout [ 80.720898][ T4280] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 80.728698][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 80.738081][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 80.750035][ T4280] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 80.759455][ T4280] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 80.768928][ T4280] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 80.778053][ T4280] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 80.835905][ T155] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 80.845382][ T155] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 80.853683][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 80.888711][ T154] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 80.897176][ T154] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 80.906295][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 81.047464][ T4325] [ 81.049852][ T4325] ====================================================== [ 81.056975][ T4325] WARNING: possible circular locking dependency detected [ 81.064020][ T4325] syzkaller #0 Not tainted [ 81.068533][ T4325] ------------------------------------------------------ [ 81.075583][ T4325] syz.0.17/4325 is trying to acquire lock: [ 81.081402][ T4325] ffff8880257c4c28 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xfa/0x210 [ 81.092493][ T4325] [ 81.092493][ T4325] but task is already holding lock: [ 81.099875][ T4325] ffffffff8d6c5de8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x18b/0x560 [ 81.109578][ T4325] [ 81.109578][ T4325] which lock already depends on the new lock. [ 81.109578][ T4325] [ 81.120002][ T4325] [ 81.120002][ T4325] the existing dependency chain (in reverse order) is: [ 81.129039][ T4325] [ 81.129039][ T4325] -> #4 (rfkill_global_mutex){+.+.}-{3:3}: [ 81.137059][ T4325] __mutex_lock_common+0x1e3/0x2400 [ 81.142814][ T4325] mutex_lock_nested+0x17/0x20 [ 81.148129][ T4325] rfkill_register+0x33/0x980 [ 81.153357][ T4325] hci_register_dev+0x452/0x970 [ 81.158760][ T4325] vhci_create_device+0x32c/0x5c0 [ 81.164334][ T4325] vhci_write+0x391/0x450 [ 81.169223][ T4325] vfs_write+0x745/0xd60 [ 81.174024][ T4325] ksys_write+0x152/0x260 [ 81.178993][ T4325] do_syscall_64+0x4c/0xa0 [ 81.183954][ T4325] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 81.190400][ T4325] [ 81.190400][ T4325] -> #3 (&data->open_mutex){+.+.}-{3:3}: [ 81.198426][ T4325] __mutex_lock_common+0x1e3/0x2400 [ 81.204190][ T4325] mutex_lock_nested+0x17/0x20 [ 81.209511][ T4325] vhci_send_frame+0x88/0x100 [ 81.214739][ T4325] hci_send_frame+0x1a9/0x2e0 [ 81.219988][ T4325] hci_tx_work+0x9f9/0x1710 [ 81.225051][ T4325] process_one_work+0x85f/0x1010 [ 81.230542][ T4325] worker_thread+0xaa6/0x1290 [ 81.235782][ T4325] kthread+0x436/0x520 [ 81.240398][ T4325] ret_from_fork+0x1f/0x30 [ 81.245395][ T4325] [ 81.245395][ T4325] -> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}: [ 81.254642][ T4325] __flush_work+0x116/0x210 [ 81.259697][ T4325] hci_dev_do_close+0x1e7/0x1030 [ 81.265185][ T4325] hci_unregister_dev+0x2d7/0x580 [ 81.270776][ T4325] vhci_release+0x73/0xc0 [ 81.275665][ T4325] __fput+0x234/0x930 [ 81.280198][ T4325] task_work_run+0x125/0x1a0 [ 81.285337][ T4325] do_exit+0x626/0x20c0 [ 81.290043][ T4325] do_group_exit+0x12e/0x300 [ 81.295186][ T4325] get_signal+0x6ca/0x12c0 [ 81.300162][ T4325] arch_do_signal_or_restart+0xe7/0x12c0 [ 81.306348][ T4325] exit_to_user_mode_loop+0x9e/0x130 [ 81.312269][ T4325] exit_to_user_mode_prepare+0xee/0x180 [ 81.318361][ T4325] syscall_exit_to_user_mode+0x16/0x40 [ 81.324379][ T4325] do_syscall_64+0x58/0xa0 [ 81.329354][ T4325] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 81.335803][ T4325] [ 81.335803][ T4325] -> #1 (&hdev->req_lock){+.+.}-{3:3}: [ 81.343492][ T4325] __mutex_lock_common+0x1e3/0x2400 [ 81.349246][ T4325] mutex_lock_nested+0x17/0x20 [ 81.354567][ T4325] bg_scan_update+0x44/0x3b0 [ 81.359804][ T4325] process_one_work+0x85f/0x1010 [ 81.365300][ T4325] worker_thread+0xaa6/0x1290 [ 81.370552][ T4325] kthread+0x436/0x520 [ 81.375316][ T4325] ret_from_fork+0x1f/0x30 [ 81.380288][ T4325] [ 81.380288][ T4325] -> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}: [ 81.390167][ T4325] __lock_acquire+0x2c42/0x7d10 [ 81.395586][ T4325] lock_acquire+0x19e/0x400 [ 81.400636][ T4325] __flush_work+0x116/0x210 [ 81.405682][ T4325] __cancel_work_timer+0x3f4/0x560 [ 81.411343][ T4325] hci_request_cancel_all+0xcc/0x300 [ 81.417202][ T4325] hci_dev_do_close+0x4e/0x1030 [ 81.422609][ T4325] hci_rfkill_set_block+0x10a/0x190 [ 81.428363][ T4325] rfkill_set_block+0x1c9/0x3d0 [ 81.433773][ T4325] rfkill_fop_write+0x452/0x560 [ 81.439176][ T4325] vfs_write+0x30b/0xd60 [ 81.443965][ T4325] ksys_write+0x152/0x260 [ 81.448849][ T4325] do_syscall_64+0x4c/0xa0 [ 81.453826][ T4325] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 81.460278][ T4325] [ 81.460278][ T4325] other info that might help us debug this: [ 81.460278][ T4325] [ 81.470529][ T4325] Chain exists of: [ 81.470529][ T4325] (work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex [ 81.470529][ T4325] [ 81.486297][ T4325] Possible unsafe locking scenario: [ 81.486297][ T4325] [ 81.493778][ T4325] CPU0 CPU1 [ 81.499160][ T4325] ---- ---- [ 81.504547][ T4325] lock(rfkill_global_mutex); [ 81.509337][ T4325] lock(&data->open_mutex); [ 81.516479][ T4325] lock(rfkill_global_mutex); [ 81.523794][ T4325] lock((work_completion)(&hdev->bg_scan_update)); [ 81.530427][ T4325] [ 81.530427][ T4325] *** DEADLOCK *** [ 81.530427][ T4325] [ 81.538598][ T4325] 1 lock held by syz.0.17/4325: [ 81.543486][ T4325] #0: ffffffff8d6c5de8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x18b/0x560 [ 81.553624][ T4325] [ 81.553624][ T4325] stack backtrace: [ 81.559547][ T4325] CPU: 1 PID: 4325 Comm: syz.0.17 Not tainted syzkaller #0 [ 81.567450][ T4325] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 [ 81.577544][ T4325] Call Trace: [ 81.580847][ T4325] [ 81.583809][ T4325] dump_stack_lvl+0x188/0x250 [ 81.588521][ T4325] ? load_image+0x400/0x400 [ 81.593054][ T4325] ? show_regs_print_info+0x20/0x20 [ 81.598285][ T4325] ? print_circular_bug+0x12b/0x1a0 [ 81.603514][ T4325] check_noncircular+0x296/0x330 [ 81.608485][ T4325] ? look_up_lock_class+0x71/0x110 [ 81.613630][ T4325] ? add_chain_block+0x940/0x940 [ 81.618595][ T4325] ? lockdep_lock+0xf1/0x1f0 [ 81.623228][ T4325] ? __lock_acquire+0x12e8/0x7d10 [ 81.628292][ T4325] ? mark_lock+0x94/0x320 [ 81.632654][ T4325] __lock_acquire+0x2c42/0x7d10 [ 81.637555][ T4325] ? verify_lock_unused+0x140/0x140 [ 81.642795][ T4325] ? verify_lock_unused+0x140/0x140 [ 81.648026][ T4325] ? mark_lock+0x94/0x320 [ 81.652393][ T4325] lock_acquire+0x19e/0x400 [ 81.656927][ T4325] ? __flush_work+0xfa/0x210 [ 81.661546][ T4325] ? __lock_acquire+0x7d10/0x7d10 [ 81.666611][ T4325] ? read_lock_is_recursive+0x10/0x10 [ 81.672013][ T4325] ? start_flush_work+0x776/0x820 [ 81.677073][ T4325] __flush_work+0x116/0x210 [ 81.681616][ T4325] ? __flush_work+0xfa/0x210 [ 81.686235][ T4325] ? flush_work+0x20/0x20 [ 81.690589][ T4325] ? try_to_grab_pending+0xfa/0x7f0 [ 81.695827][ T4325] ? mark_lock+0x94/0x320 [ 81.700270][ T4325] ? lockdep_hardirqs_on_prepare+0x409/0x770 [ 81.706284][ T4325] ? lock_chain_count+0x20/0x20 [ 81.711175][ T4325] ? mark_lock+0x94/0x320 [ 81.715534][ T4325] ? __cancel_work_timer+0x36a/0x560 [ 81.720849][ T4325] __cancel_work_timer+0x3f4/0x560 [ 81.725986][ T4325] ? cancel_work_sync+0x20/0x20 [ 81.731020][ T4325] ? __cancel_work+0x1f9/0x2e0 [ 81.735816][ T4325] ? lockdep_hardirqs_on+0x94/0x140 [ 81.741141][ T4325] ? __cancel_work+0x27b/0x2e0 [ 81.745951][ T4325] ? cancel_work+0x20/0x20 [ 81.750400][ T4325] ? lock_chain_count+0x20/0x20 [ 81.755292][ T4325] hci_request_cancel_all+0xcc/0x300 [ 81.760624][ T4325] hci_dev_do_close+0x4e/0x1030 [ 81.765512][ T4325] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 81.771448][ T4325] ? _raw_spin_unlock+0x40/0x40 [ 81.776341][ T4325] hci_rfkill_set_block+0x10a/0x190 [ 81.781611][ T4325] ? rcu_lock_release+0x20/0x20 [ 81.786500][ T4325] rfkill_set_block+0x1c9/0x3d0 [ 81.791383][ T4325] rfkill_fop_write+0x452/0x560 [ 81.796261][ T4325] ? rfkill_fop_read+0x520/0x520 [ 81.801232][ T4325] ? common_file_perm+0x140/0x1c0 [ 81.806287][ T4325] ? fsnotify_perm+0x5d/0x560 [ 81.811001][ T4325] ? security_file_permission+0x75/0xa0 [ 81.816588][ T4325] ? rfkill_fop_read+0x520/0x520 [ 81.821572][ T4325] vfs_write+0x30b/0xd60 [ 81.825848][ T4325] ? file_end_write+0x250/0x250 [ 81.830744][ T4325] ? __context_tracking_exit+0x4c/0x80 [ 81.836233][ T4325] ? __lock_acquire+0x7d10/0x7d10 [ 81.841294][ T4325] ? __fdget_pos+0x1e2/0x370 [ 81.845915][ T4325] ksys_write+0x152/0x260 [ 81.850273][ T4325] ? __ia32_sys_read+0x80/0x80 [ 81.855068][ T4325] ? lockdep_hardirqs_on+0x94/0x140 [ 81.860300][ T4325] do_syscall_64+0x4c/0xa0 [ 81.864743][ T4325] ? clear_bhb_loop+0x30/0x80 [ 81.869449][ T4325] ? clear_bhb_loop+0x30/0x80 [ 81.874166][ T4325] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 81.880113][ T4325] RIP: 0033:0x7f300a55fdd9 [ 81.884572][ T4325] 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 [ 81.904204][ T4325] RSP: 002b:00007fffacca2078 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 81.912656][ T4325] RAX: ffffffffffffffda RBX: 00007f300a7d8fa0 RCX: 00007f300a55fdd9 [ 81.920664][ T4325] RDX: 0000000000000008 RSI: 0000200000000280 RDI: 0000000000000003 [ 81.928693][ T4325] RBP: 00007f300a5f5d69 R08: 0000000000000000 R09: 0000000000000000 [ 81.936692][ T4325] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 81.944690][ T4325] R13: 00007f300a7d8fac R14: 00007f300a7d8fa0 R15: 00007f300a7d8fa0 [ 81.952703][ T4325]