Warning: Permanently added '10.128.0.223' (ED25519) to the list of known hosts. 2026/04/18 01:53:18 parsed 1 programs syzkaller login: [ 69.075841][ T4189] cgroup: Unknown subsys name 'net' [ 69.211184][ T4189] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 70.724715][ T4189] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 71.507491][ T1421] ieee802154 phy0 wpan0: encryption failed: -22 [ 71.514005][ T1421] ieee802154 phy1 wpan1: encryption failed: -22 [ 73.753227][ T4231] chnl_net:caif_netlink_parms(): no params data found [ 73.821582][ T4231] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.830679][ T4231] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.839443][ T4231] device bridge_slave_0 entered promiscuous mode [ 73.851376][ T4231] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.858959][ T4231] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.868621][ T4231] device bridge_slave_1 entered promiscuous mode [ 73.897653][ T4231] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 73.910802][ T4231] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 73.938514][ T4231] team0: Port device team_slave_0 added [ 73.946726][ T4231] team0: Port device team_slave_1 added [ 73.970494][ T4231] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 73.977861][ T4231] 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. [ 74.005394][ T4231] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 74.021297][ T4231] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 74.029911][ T4231] 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. [ 74.057334][ T4231] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 74.096364][ T4231] device hsr_slave_0 entered promiscuous mode [ 74.103316][ T4231] device hsr_slave_1 entered promiscuous mode [ 74.233830][ T4231] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 74.245630][ T4231] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 74.255614][ T4231] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 74.266390][ T4231] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 74.394844][ T4231] 8021q: adding VLAN 0 to HW filter on device bond0 [ 74.417511][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 74.433550][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 74.445507][ T4231] 8021q: adding VLAN 0 to HW filter on device team0 [ 74.462291][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 74.471282][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.482847][ T9] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.490185][ T9] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.499926][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 74.517379][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 74.526939][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.538279][ T144] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.545397][ T144] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.556740][ T1488] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 74.584469][ T1488] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 74.595136][ T1488] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 74.605036][ T1488] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.613621][ T1488] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 74.625688][ T1488] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 74.634658][ T1488] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.645676][ T1488] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 74.658247][ T1488] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 74.670146][ T4231] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 74.757763][ T1488] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 74.765653][ T1488] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 74.779151][ T4231] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 74.799675][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 74.819653][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 74.828654][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 74.836754][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 74.847850][ T4231] device veth0_vlan entered promiscuous mode [ 74.881653][ T4231] device veth1_vlan entered promiscuous mode [ 74.903284][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 74.911957][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 74.920867][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 74.933544][ T4231] device veth0_macvtap entered promiscuous mode [ 74.962589][ T4231] device veth1_macvtap entered promiscuous mode [ 74.981556][ T4231] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 74.990282][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 74.999014][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 75.007983][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 75.020462][ T4231] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 75.029603][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 75.038394][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 75.066439][ T4231] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.075473][ T4231] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.085075][ T4231] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.093806][ T4231] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.073372][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 76.091806][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 76.103046][ T1488] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 76.130154][ T4286] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 76.142490][ T4286] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 76.151442][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2026/04/18 01:53:28 executed programs: 0 [ 77.057218][ T4294] chnl_net:caif_netlink_parms(): no params data found [ 77.117650][ T4294] bridge0: port 1(bridge_slave_0) entered blocking state [ 77.124923][ T4294] bridge0: port 1(bridge_slave_0) entered disabled state [ 77.132775][ T4294] device bridge_slave_0 entered promiscuous mode [ 77.142025][ T4294] bridge0: port 2(bridge_slave_1) entered blocking state [ 77.149810][ T4294] bridge0: port 2(bridge_slave_1) entered disabled state [ 77.158261][ T4294] device bridge_slave_1 entered promiscuous mode [ 77.181424][ T4294] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 77.194735][ T4294] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 77.221074][ T4294] team0: Port device team_slave_0 added [ 77.229550][ T4294] team0: Port device team_slave_1 added [ 77.251459][ T4294] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 77.258775][ T4294] 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. [ 77.287500][ T4294] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 77.300385][ T4294] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 77.310177][ T4294] 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. [ 77.339543][ T4294] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 77.379021][ T4294] device hsr_slave_0 entered promiscuous mode [ 77.385888][ T4294] device hsr_slave_1 entered promiscuous mode [ 77.393392][ T4294] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 77.401892][ T4294] Cannot create hsr debugfs directory [ 77.474687][ T4294] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 78.945176][ T4302] Bluetooth: hci0: command 0x0409 tx timeout [ 80.792228][ T4294] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 80.869972][ T4294] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 80.939064][ T4294] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 81.014690][ T4253] Bluetooth: hci0: command 0x041b tx timeout [ 81.062930][ T4294] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 81.088663][ T4294] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 81.103123][ T4294] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 81.112392][ T4294] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 81.187066][ T4294] 8021q: adding VLAN 0 to HW filter on device bond0 [ 81.221047][ T4286] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 81.228991][ T4286] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 81.240315][ T4294] 8021q: adding VLAN 0 to HW filter on device team0 [ 81.250472][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 81.261551][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 81.270521][ T144] bridge0: port 1(bridge_slave_0) entered blocking state [ 81.277661][ T144] bridge0: port 1(bridge_slave_0) entered forwarding state [ 81.288391][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 81.317058][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 81.326859][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 81.337029][ T144] bridge0: port 2(bridge_slave_1) entered blocking state [ 81.344193][ T144] bridge0: port 2(bridge_slave_1) entered forwarding state [ 81.368224][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 81.377222][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 81.386118][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 81.395828][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 81.404567][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 81.413160][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 81.422194][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 81.430968][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 81.439838][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 81.463705][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 81.472460][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 81.483733][ T4294] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 81.613333][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 81.621484][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 81.636588][ T4294] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 81.665625][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 81.675413][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 81.693708][ T1171] device hsr_slave_0 left promiscuous mode [ 81.702053][ T1171] device hsr_slave_1 left promiscuous mode [ 81.709643][ T1171] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 81.717488][ T1171] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 81.726290][ T1171] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 81.734017][ T1171] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 81.742274][ T1171] device bridge_slave_1 left promiscuous mode [ 81.750010][ T1171] bridge0: port 2(bridge_slave_1) entered disabled state [ 81.763773][ T1171] device bridge_slave_0 left promiscuous mode [ 81.770239][ T1171] bridge0: port 1(bridge_slave_0) entered disabled state [ 81.789063][ T1171] device veth1_macvtap left promiscuous mode [ 81.795655][ T1171] device veth0_macvtap left promiscuous mode [ 81.801737][ T1171] device veth1_vlan left promiscuous mode [ 81.808526][ T1171] device veth0_vlan left promiscuous mode [ 81.983564][ T1171] team0 (unregistering): Port device team_slave_1 removed [ 81.998780][ T1171] team0 (unregistering): Port device team_slave_0 removed [ 82.011768][ T1171] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 82.027614][ T1171] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 82.089200][ T1171] bond0 (unregistering): Released all slaves [ 82.153468][ T4294] device veth0_vlan entered promiscuous mode [ 82.161587][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 82.170918][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 82.181910][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 82.190604][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 82.200623][ T4294] device veth1_vlan entered promiscuous mode [ 82.240199][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 82.249911][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 82.259103][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 82.268113][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 82.280364][ T4294] device veth0_macvtap entered promiscuous mode [ 82.302573][ T4294] device veth1_macvtap entered promiscuous mode [ 82.320318][ T4294] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 82.329384][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 82.338378][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 82.347683][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 82.360414][ T4294] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 82.371263][ T4294] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 82.383608][ T4294] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 82.392714][ T4294] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 82.401775][ T4294] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 82.412925][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 82.422601][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 82.485732][ T144] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 82.493607][ T144] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 82.508540][ T4286] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 82.526530][ T4286] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 82.536273][ T4286] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 82.543877][ T4286] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 82.674024][ T4313] [ 82.676533][ T4313] ====================================================== [ 82.683570][ T4313] WARNING: possible circular locking dependency detected [ 82.690632][ T4313] syzkaller #0 Not tainted [ 82.695203][ T4313] ------------------------------------------------------ [ 82.702251][ T4313] syz.0.17/4313 is trying to acquire lock: [ 82.708173][ T4313] ffff8880251c8c28 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xfa/0x210 [ 82.719287][ T4313] [ 82.719287][ T4313] but task is already holding lock: [ 82.726676][ T4313] ffffffff8d6c51a8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x18b/0x560 [ 82.736395][ T4313] [ 82.736395][ T4313] which lock already depends on the new lock. [ 82.736395][ T4313] [ 82.746830][ T4313] [ 82.746830][ T4313] the existing dependency chain (in reverse order) is: [ 82.755870][ T4313] [ 82.755870][ T4313] -> #4 (rfkill_global_mutex){+.+.}-{3:3}: [ 82.763954][ T4313] __mutex_lock_common+0x1e3/0x2400 [ 82.769727][ T4313] mutex_lock_nested+0x17/0x20 [ 82.775064][ T4313] rfkill_register+0x33/0x8a0 [ 82.780302][ T4313] hci_register_dev+0x452/0x970 [ 82.785719][ T4313] vhci_create_device+0x32c/0x5c0 [ 82.791417][ T4313] vhci_write+0x391/0x450 [ 82.796419][ T4313] vfs_write+0x745/0xd60 [ 82.801227][ T4313] ksys_write+0x152/0x260 [ 82.806116][ T4313] do_syscall_64+0x4c/0xa0 [ 82.811097][ T4313] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 82.817548][ T4313] [ 82.817548][ T4313] -> #3 (&data->open_mutex){+.+.}-{3:3}: [ 82.825407][ T4313] __mutex_lock_common+0x1e3/0x2400 [ 82.831211][ T4313] mutex_lock_nested+0x17/0x20 [ 82.836538][ T4313] vhci_send_frame+0x88/0x100 [ 82.841896][ T4313] hci_send_frame+0x1a9/0x2e0 [ 82.847139][ T4313] hci_tx_work+0x9f9/0x1710 [ 82.852210][ T4313] process_one_work+0x85f/0x1010 [ 82.857720][ T4313] worker_thread+0xaa6/0x1290 [ 82.862953][ T4313] kthread+0x436/0x520 [ 82.867592][ T4313] ret_from_fork+0x1f/0x30 [ 82.872567][ T4313] [ 82.872567][ T4313] -> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}: [ 82.881824][ T4313] __flush_work+0x116/0x210 [ 82.886891][ T4313] hci_dev_do_close+0x1e7/0x1030 [ 82.892481][ T4313] hci_unregister_dev+0x2d7/0x580 [ 82.898068][ T4313] vhci_release+0x73/0xc0 [ 82.902959][ T4313] __fput+0x234/0x930 [ 82.907530][ T4313] task_work_run+0x125/0x1a0 [ 82.912704][ T4313] do_exit+0x626/0x20c0 [ 82.917420][ T4313] do_group_exit+0x12e/0x300 [ 82.922566][ T4313] get_signal+0x6ca/0x12c0 [ 82.927537][ T4313] arch_do_signal_or_restart+0xe7/0x12c0 [ 82.933731][ T4313] exit_to_user_mode_loop+0x9e/0x130 [ 82.939572][ T4313] exit_to_user_mode_prepare+0xee/0x180 [ 82.945671][ T4313] syscall_exit_to_user_mode+0x16/0x40 [ 82.951686][ T4313] do_syscall_64+0x58/0xa0 [ 82.956666][ T4313] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 82.963117][ T4313] [ 82.963117][ T4313] -> #1 (&hdev->req_lock){+.+.}-{3:3}: [ 82.970798][ T4313] __mutex_lock_common+0x1e3/0x2400 [ 82.976554][ T4313] mutex_lock_nested+0x17/0x20 [ 82.981984][ T4313] bg_scan_update+0x44/0x3b0 [ 82.987144][ T4313] process_one_work+0x85f/0x1010 [ 82.992783][ T4313] worker_thread+0xaa6/0x1290 [ 82.998036][ T4313] kthread+0x436/0x520 [ 83.002662][ T4313] ret_from_fork+0x1f/0x30 [ 83.007638][ T4313] [ 83.007638][ T4313] -> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}: [ 83.017572][ T4313] __lock_acquire+0x2c42/0x7d10 [ 83.022985][ T4313] lock_acquire+0x19e/0x400 [ 83.028050][ T4313] __flush_work+0x116/0x210 [ 83.033113][ T4313] __cancel_work_timer+0x3f4/0x560 [ 83.038779][ T4313] hci_request_cancel_all+0xcc/0x300 [ 83.044618][ T4313] hci_dev_do_close+0x4e/0x1030 [ 83.050027][ T4313] hci_rfkill_set_block+0x10a/0x190 [ 83.055786][ T4313] rfkill_set_block+0x1c6/0x420 [ 83.061196][ T4313] rfkill_fop_write+0x452/0x560 [ 83.066602][ T4313] vfs_write+0x30b/0xd60 [ 83.071402][ T4313] ksys_write+0x152/0x260 [ 83.076286][ T4313] do_syscall_64+0x4c/0xa0 [ 83.081259][ T4313] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 83.087743][ T4313] [ 83.087743][ T4313] other info that might help us debug this: [ 83.087743][ T4313] [ 83.098000][ T4313] Chain exists of: [ 83.098000][ T4313] (work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex [ 83.098000][ T4313] [ 83.113770][ T4313] Possible unsafe locking scenario: [ 83.113770][ T4313] [ 83.121394][ T4313] CPU0 CPU1 [ 83.126804][ T4313] ---- ---- [ 83.132239][ T4313] lock(rfkill_global_mutex); [ 83.137029][ T4313] lock(&data->open_mutex); [ 83.144191][ T4313] lock(rfkill_global_mutex); [ 83.151545][ T4313] lock((work_completion)(&hdev->bg_scan_update)); [ 83.158159][ T4313] [ 83.158159][ T4313] *** DEADLOCK *** [ 83.158159][ T4313] [ 83.166365][ T4313] 1 lock held by syz.0.17/4313: [ 83.171519][ T4313] #0: ffffffff8d6c51a8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x18b/0x560 [ 83.181782][ T4313] [ 83.181782][ T4313] stack backtrace: [ 83.187712][ T4313] CPU: 1 PID: 4313 Comm: syz.0.17 Not tainted syzkaller #0 [ 83.194942][ T4313] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 83.205044][ T4313] Call Trace: [ 83.208345][ T4313] [ 83.211304][ T4313] dump_stack_lvl+0x188/0x250 [ 83.216044][ T4313] ? load_image+0x400/0x400 [ 83.220580][ T4313] ? show_regs_print_info+0x20/0x20 [ 83.225812][ T4313] ? print_circular_bug+0x12b/0x1a0 [ 83.231051][ T4313] check_noncircular+0x296/0x330 [ 83.236047][ T4313] ? look_up_lock_class+0x71/0x110 [ 83.241211][ T4313] ? add_chain_block+0x940/0x940 [ 83.246418][ T4313] ? lockdep_lock+0xf1/0x1f0 [ 83.251056][ T4313] ? __lock_acquire+0x12e8/0x7d10 [ 83.256218][ T4313] ? mark_lock+0x94/0x320 [ 83.260592][ T4313] __lock_acquire+0x2c42/0x7d10 [ 83.265509][ T4313] ? verify_lock_unused+0x140/0x140 [ 83.270748][ T4313] ? verify_lock_unused+0x140/0x140 [ 83.275985][ T4313] ? mark_lock+0x94/0x320 [ 83.280380][ T4313] lock_acquire+0x19e/0x400 [ 83.284928][ T4313] ? __flush_work+0xfa/0x210 [ 83.289553][ T4313] ? __lock_acquire+0x7d10/0x7d10 [ 83.294614][ T4313] ? read_lock_is_recursive+0x10/0x10 [ 83.300026][ T4313] ? start_flush_work+0x776/0x820 [ 83.305116][ T4313] __flush_work+0x116/0x210 [ 83.309642][ T4313] ? __flush_work+0xfa/0x210 [ 83.314259][ T4313] ? flush_work+0x20/0x20 [ 83.318620][ T4313] ? try_to_grab_pending+0xfa/0x7f0 [ 83.323845][ T4313] ? mark_lock+0x94/0x320 [ 83.328200][ T4313] ? lockdep_hardirqs_on_prepare+0x409/0x770 [ 83.334212][ T4313] ? lock_chain_count+0x20/0x20 [ 83.339093][ T4313] ? mark_lock+0x94/0x320 [ 83.343445][ T4313] ? __cancel_work_timer+0x36a/0x560 [ 83.348758][ T4313] __cancel_work_timer+0x3f4/0x560 [ 83.353890][ T4313] ? cancel_work_sync+0x20/0x20 [ 83.358770][ T4313] ? __cancel_work+0x1f9/0x2e0 [ 83.363556][ T4313] ? lockdep_hardirqs_on+0x94/0x140 [ 83.368782][ T4313] ? __cancel_work+0x27b/0x2e0 [ 83.373572][ T4313] ? cancel_work+0x20/0x20 [ 83.378053][ T4313] ? lock_chain_count+0x20/0x20 [ 83.382939][ T4313] hci_request_cancel_all+0xcc/0x300 [ 83.388261][ T4313] hci_dev_do_close+0x4e/0x1030 [ 83.393153][ T4313] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 83.399085][ T4313] ? _raw_spin_unlock+0x40/0x40 [ 83.403968][ T4313] hci_rfkill_set_block+0x10a/0x190 [ 83.409210][ T4313] ? rcu_lock_release+0x20/0x20 [ 83.414181][ T4313] rfkill_set_block+0x1c6/0x420 [ 83.419166][ T4313] rfkill_fop_write+0x452/0x560 [ 83.424057][ T4313] ? rfkill_fop_read+0x4d0/0x4d0 [ 83.429035][ T4313] ? common_file_perm+0x110/0x1c0 [ 83.434218][ T4313] ? fsnotify_perm+0x5d/0x560 [ 83.438931][ T4313] ? security_file_permission+0x75/0xa0 [ 83.444540][ T4313] ? rfkill_fop_read+0x4d0/0x4d0 [ 83.449594][ T4313] vfs_write+0x30b/0xd60 [ 83.453862][ T4313] ? file_end_write+0x250/0x250 [ 83.458787][ T4313] ? __context_tracking_exit+0x4c/0x80 [ 83.464286][ T4313] ? __lock_acquire+0x7d10/0x7d10 [ 83.469343][ T4313] ? __fdget_pos+0x1e2/0x370 [ 83.473971][ T4313] ksys_write+0x152/0x260 [ 83.478329][ T4313] ? __ia32_sys_read+0x80/0x80 [ 83.483149][ T4313] ? lockdep_hardirqs_on+0x94/0x140 [ 83.488381][ T4313] do_syscall_64+0x4c/0xa0 [ 83.492819][ T4313] ? clear_bhb_loop+0x30/0x80 [ 83.497523][ T4313] ? clear_bhb_loop+0x30/0x80 [ 83.502273][ T4313] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 83.508208][ T4313] RIP: 0033:0x7f7836785819 [ 83.512655][ T4313] 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 [ 83.532295][ T4313] RSP: 002b:00007ffcbf78fee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 83.540833][ T4313] RAX: ffffffffffffffda RBX: 00007f78369fefa0 RCX: 00007f7836785819 [ 83.548833][ T4313] RDX: 0000000000000008 RSI: 0000200000000040 RDI: 0000000000000003 [ 83.556832][ T4313] RBP: 00007f783681bc91 R08: 0000000000000000 R09: 0000000000000000 [ 83.564846][ T4313] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 83.572844][ T4313] R13: 00007f78369fefac R14: 00007f78369fefa0 R15: 00007f78369fefa0 [ 83.580870][ T4313] [ 83.598002][ T21] Bluetooth: hci0: command 0x040f tx timeout