no interfaces have a carrier [ 37.699084][ T3854] 8021q: adding VLAN 0 to HW filter on device bond0 [ 37.709551][ T3854] eql: remember to turn off Van-Jacobson compression on your slave devices Starting crond: OK Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.8' (ED25519) to the list of known hosts. 2026/04/29 18:46:49 parsed 1 programs syzkaller login: [ 66.729616][ T4188] cgroup: Unknown subsys name 'net' [ 66.892439][ T4188] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 68.468752][ T4188] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 70.393351][ T154] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 70.403873][ T154] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 70.413545][ T1457] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 70.430883][ T154] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 70.438901][ T154] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 70.447190][ T1457] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 71.295638][ T4237] chnl_net:caif_netlink_parms(): no params data found [ 71.361484][ T4237] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.369347][ T4237] bridge0: port 1(bridge_slave_0) entered disabled state [ 71.378247][ T4237] device bridge_slave_0 entered promiscuous mode [ 71.389218][ T4237] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.396364][ T4237] bridge0: port 2(bridge_slave_1) entered disabled state [ 71.404964][ T4237] device bridge_slave_1 entered promiscuous mode [ 71.435126][ T4237] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 71.447561][ T4237] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 71.480713][ T1420] ieee802154 phy0 wpan0: encryption failed: -22 [ 71.487326][ T1420] ieee802154 phy1 wpan1: encryption failed: -22 [ 71.498680][ T4237] team0: Port device team_slave_0 added [ 71.507889][ T4237] team0: Port device team_slave_1 added [ 71.532696][ T4237] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 71.539977][ T4237] 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. [ 71.568085][ T4237] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 71.581742][ T4237] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 71.590452][ T4237] 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. [ 71.618846][ T4237] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 71.659889][ T4237] device hsr_slave_0 entered promiscuous mode [ 71.669220][ T4237] device hsr_slave_1 entered promiscuous mode [ 71.809294][ T4237] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 71.822633][ T4237] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 71.833058][ T4237] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 71.846170][ T4237] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 71.876114][ T4237] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.883389][ T4237] bridge0: port 2(bridge_slave_1) entered forwarding state [ 71.891716][ T4237] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.899071][ T4237] bridge0: port 1(bridge_slave_0) entered forwarding state [ 71.952842][ T4237] 8021q: adding VLAN 0 to HW filter on device bond0 [ 71.983792][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 72.047051][ T154] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.060160][ T154] bridge0: port 2(bridge_slave_1) entered disabled state [ 72.072672][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 72.101692][ T4237] 8021q: adding VLAN 0 to HW filter on device team0 [ 72.117897][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 72.126796][ T144] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.133867][ T144] bridge0: port 1(bridge_slave_0) entered forwarding state [ 72.145825][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 72.154368][ T144] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.161513][ T144] bridge0: port 2(bridge_slave_1) entered forwarding state [ 72.182276][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 72.191166][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 72.203253][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 72.215348][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 72.228058][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 72.238922][ T4237] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 72.319405][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 72.327512][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 72.341887][ T4237] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 72.363975][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 72.373717][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 72.392638][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 72.402323][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 72.411901][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 72.419740][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 72.444880][ T4237] device veth0_vlan entered promiscuous mode [ 72.455927][ T4237] device veth1_vlan entered promiscuous mode [ 72.473214][ T1457] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 72.481878][ T1457] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 72.491579][ T1457] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 72.501021][ T1457] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 72.512105][ T4237] device veth0_macvtap entered promiscuous mode [ 72.536007][ T4237] device veth1_macvtap entered promiscuous mode [ 72.552770][ T4237] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 72.560554][ T1457] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 72.569293][ T1457] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 72.578094][ T1457] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 72.587325][ T1457] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 72.599855][ T4237] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 72.608986][ T1457] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 72.618190][ T1457] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 72.630543][ T4237] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 72.640345][ T4237] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 72.650100][ T4237] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 72.659429][ T4237] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 2026/04/29 18:46:58 executed programs: 0 [ 74.450826][ T4293] chnl_net:caif_netlink_parms(): no params data found [ 74.515814][ T4293] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.523078][ T4293] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.534980][ T4293] device bridge_slave_0 entered promiscuous mode [ 74.544142][ T4293] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.554318][ T4293] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.563030][ T4293] device bridge_slave_1 entered promiscuous mode [ 74.594994][ T4293] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 74.610183][ T4293] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 74.644480][ T4293] team0: Port device team_slave_0 added [ 74.652689][ T4293] team0: Port device team_slave_1 added [ 74.683083][ T4293] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 74.690386][ T4293] 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. [ 74.719279][ T4293] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 74.732147][ T4293] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 74.741938][ T4293] 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. [ 74.774305][ T4293] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 74.811660][ T4293] device hsr_slave_0 entered promiscuous mode [ 74.818664][ T4293] device hsr_slave_1 entered promiscuous mode [ 74.825514][ T4293] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 74.834117][ T4293] Cannot create hsr debugfs directory [ 74.923789][ T4293] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 76.357342][ T4252] Bluetooth: hci0: command 0x0409 tx timeout [ 78.084057][ T4293] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 78.152487][ T4293] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 78.203310][ T4293] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 78.332530][ T4293] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 78.354165][ T4293] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 78.364594][ T4293] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 78.373798][ T4293] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 78.427524][ T4252] Bluetooth: hci0: command 0x041b tx timeout [ 78.455255][ T4293] 8021q: adding VLAN 0 to HW filter on device bond0 [ 78.469174][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 78.478148][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 78.487478][ T4293] 8021q: adding VLAN 0 to HW filter on device team0 [ 78.498781][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 78.507836][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 78.516190][ T144] bridge0: port 1(bridge_slave_0) entered blocking state [ 78.523396][ T144] bridge0: port 1(bridge_slave_0) entered forwarding state [ 78.531803][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 78.555627][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 78.565633][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 78.574234][ T144] bridge0: port 2(bridge_slave_1) entered blocking state [ 78.581406][ T144] bridge0: port 2(bridge_slave_1) entered forwarding state [ 78.597800][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 78.610358][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 78.627487][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 78.637640][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 78.645977][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 78.656170][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 78.665714][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 78.674509][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 78.697245][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 78.705580][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 78.715042][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 78.726134][ T4293] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 78.744103][ T239] device hsr_slave_0 left promiscuous mode [ 78.751796][ T239] device hsr_slave_1 left promiscuous mode [ 78.760920][ T239] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 78.768856][ T239] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 78.779255][ T239] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 78.787686][ T239] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 78.795560][ T239] device bridge_slave_1 left promiscuous mode [ 78.802905][ T239] bridge0: port 2(bridge_slave_1) entered disabled state [ 78.815241][ T239] device bridge_slave_0 left promiscuous mode [ 78.823110][ T239] bridge0: port 1(bridge_slave_0) entered disabled state [ 78.840559][ T239] device veth1_macvtap left promiscuous mode [ 78.848463][ T239] device veth0_macvtap left promiscuous mode [ 78.854559][ T239] device veth1_vlan left promiscuous mode [ 78.860826][ T239] device veth0_vlan left promiscuous mode [ 79.011701][ T239] team0 (unregistering): Port device team_slave_1 removed [ 79.024770][ T239] team0 (unregistering): Port device team_slave_0 removed [ 79.037510][ T239] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 79.052876][ T239] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 79.106344][ T239] bond0 (unregistering): Released all slaves [ 79.202546][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 79.210394][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 79.223149][ T4293] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 79.244746][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 79.258580][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 79.278963][ T1457] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 79.287773][ T1457] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 79.296326][ T1457] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 79.304740][ T1457] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 79.316072][ T4293] device veth0_vlan entered promiscuous mode [ 79.336133][ T4293] device veth1_vlan entered promiscuous mode [ 79.354611][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 79.363453][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 79.371605][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 79.380594][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 79.393638][ T4293] device veth0_macvtap entered promiscuous mode [ 79.408799][ T4293] device veth1_macvtap entered promiscuous mode [ 79.426024][ T4293] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 79.434041][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 79.442650][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 79.451074][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 79.459674][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 79.473876][ T4293] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 79.485298][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 79.493963][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 79.505287][ T4293] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.514446][ T4293] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.523632][ T4293] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.532907][ T4293] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.599681][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 79.612011][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 79.620873][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 79.665348][ T9] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 79.674934][ T9] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 79.684104][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 79.798480][ T4306] [ 79.800954][ T4306] ====================================================== [ 79.808133][ T4306] WARNING: possible circular locking dependency detected [ 79.815164][ T4306] syzkaller #0 Not tainted [ 79.819681][ T4306] ------------------------------------------------------ [ 79.826885][ T4306] syz.0.17/4306 is trying to acquire lock: [ 79.832790][ T4306] ffff888077a28c28 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xfa/0x210 [ 79.843874][ T4306] [ 79.843874][ T4306] but task is already holding lock: [ 79.851263][ T4306] ffffffff8d6c5de8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x18b/0x560 [ 79.860949][ T4306] [ 79.860949][ T4306] which lock already depends on the new lock. [ 79.860949][ T4306] [ 79.871541][ T4306] [ 79.871541][ T4306] the existing dependency chain (in reverse order) is: [ 79.880567][ T4306] [ 79.880567][ T4306] -> #4 (rfkill_global_mutex){+.+.}-{3:3}: [ 79.888595][ T4306] __mutex_lock_common+0x1e3/0x2400 [ 79.894334][ T4306] mutex_lock_nested+0x17/0x20 [ 79.899635][ T4306] rfkill_register+0x33/0x980 [ 79.904858][ T4306] hci_register_dev+0x452/0x970 [ 79.910246][ T4306] vhci_create_device+0x32c/0x5c0 [ 79.915822][ T4306] vhci_write+0x391/0x450 [ 79.920695][ T4306] vfs_write+0x745/0xd60 [ 79.925482][ T4306] ksys_write+0x152/0x260 [ 79.930357][ T4306] do_syscall_64+0x4c/0xa0 [ 79.935315][ T4306] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 79.941752][ T4306] [ 79.941752][ T4306] -> #3 (&data->open_mutex){+.+.}-{3:3}: [ 79.949604][ T4306] __mutex_lock_common+0x1e3/0x2400 [ 79.955359][ T4306] mutex_lock_nested+0x17/0x20 [ 79.960662][ T4306] vhci_send_frame+0x88/0x100 [ 79.965893][ T4306] hci_send_frame+0x1a9/0x2e0 [ 79.971107][ T4306] hci_tx_work+0x9f9/0x1710 [ 79.976145][ T4306] process_one_work+0x85f/0x1010 [ 79.981618][ T4306] worker_thread+0xaa6/0x1290 [ 79.986837][ T4306] kthread+0x436/0x520 [ 79.991444][ T4306] ret_from_fork+0x1f/0x30 [ 79.996503][ T4306] [ 79.996503][ T4306] -> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}: [ 80.005731][ T4306] __flush_work+0x116/0x210 [ 80.010778][ T4306] hci_dev_do_close+0x1e7/0x1030 [ 80.016263][ T4306] hci_unregister_dev+0x2d7/0x580 [ 80.021843][ T4306] vhci_release+0x73/0xc0 [ 80.026728][ T4306] __fput+0x234/0x930 [ 80.031376][ T4306] task_work_run+0x125/0x1a0 [ 80.036533][ T4306] do_exit+0x626/0x20c0 [ 80.041315][ T4306] do_group_exit+0x12e/0x300 [ 80.046429][ T4306] get_signal+0x6ca/0x12c0 [ 80.051384][ T4306] arch_do_signal_or_restart+0xe7/0x12c0 [ 80.057572][ T4306] exit_to_user_mode_loop+0x9e/0x130 [ 80.063383][ T4306] exit_to_user_mode_prepare+0xee/0x180 [ 80.069541][ T4306] syscall_exit_to_user_mode+0x16/0x40 [ 80.075627][ T4306] do_syscall_64+0x58/0xa0 [ 80.080580][ T4306] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 80.086998][ T4306] [ 80.086998][ T4306] -> #1 (&hdev->req_lock){+.+.}-{3:3}: [ 80.094729][ T4306] __mutex_lock_common+0x1e3/0x2400 [ 80.100453][ T4306] mutex_lock_nested+0x17/0x20 [ 80.105749][ T4306] bg_scan_update+0x44/0x3b0 [ 80.110863][ T4306] process_one_work+0x85f/0x1010 [ 80.116414][ T4306] worker_thread+0xaa6/0x1290 [ 80.121614][ T4306] kthread+0x436/0x520 [ 80.126291][ T4306] ret_from_fork+0x1f/0x30 [ 80.131234][ T4306] [ 80.131234][ T4306] -> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}: [ 80.141051][ T4306] __lock_acquire+0x2c42/0x7d10 [ 80.146425][ T4306] lock_acquire+0x19e/0x400 [ 80.151549][ T4306] __flush_work+0x116/0x210 [ 80.156675][ T4306] __cancel_work_timer+0x3f4/0x560 [ 80.162398][ T4306] hci_request_cancel_all+0xcc/0x300 [ 80.168323][ T4306] hci_dev_do_close+0x4e/0x1030 [ 80.173878][ T4306] hci_rfkill_set_block+0x10a/0x190 [ 80.179631][ T4306] rfkill_set_block+0x1c9/0x3d0 [ 80.185008][ T4306] rfkill_fop_write+0x452/0x560 [ 80.190471][ T4306] vfs_write+0x30b/0xd60 [ 80.195248][ T4306] ksys_write+0x152/0x260 [ 80.200101][ T4306] do_syscall_64+0x4c/0xa0 [ 80.205037][ T4306] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 80.211466][ T4306] [ 80.211466][ T4306] other info that might help us debug this: [ 80.211466][ T4306] [ 80.221894][ T4306] Chain exists of: [ 80.221894][ T4306] (work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex [ 80.221894][ T4306] [ 80.237639][ T4306] Possible unsafe locking scenario: [ 80.237639][ T4306] [ 80.245391][ T4306] CPU0 CPU1 [ 80.250952][ T4306] ---- ---- [ 80.256324][ T4306] lock(rfkill_global_mutex); [ 80.261109][ T4306] lock(&data->open_mutex); [ 80.268335][ T4306] lock(rfkill_global_mutex); [ 80.275646][ T4306] lock((work_completion)(&hdev->bg_scan_update)); [ 80.282357][ T4306] [ 80.282357][ T4306] *** DEADLOCK *** [ 80.282357][ T4306] [ 80.290763][ T4306] 1 lock held by syz.0.17/4306: [ 80.295709][ T4306] #0: ffffffff8d6c5de8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x18b/0x560 [ 80.305809][ T4306] [ 80.305809][ T4306] stack backtrace: [ 80.311715][ T4306] CPU: 0 PID: 4306 Comm: syz.0.17 Not tainted syzkaller #0 [ 80.318923][ T4306] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 [ 80.329253][ T4306] Call Trace: [ 80.332541][ T4306] [ 80.335570][ T4306] dump_stack_lvl+0x188/0x250 [ 80.340249][ T4306] ? load_image+0x400/0x400 [ 80.344841][ T4306] ? show_regs_print_info+0x20/0x20 [ 80.350226][ T4306] ? print_circular_bug+0x12b/0x1a0 [ 80.355538][ T4306] check_noncircular+0x296/0x330 [ 80.360617][ T4306] ? look_up_lock_class+0x71/0x110 [ 80.365916][ T4306] ? add_chain_block+0x940/0x940 [ 80.370852][ T4306] ? lockdep_lock+0xf1/0x1f0 [ 80.375451][ T4306] ? __lock_acquire+0x12e8/0x7d10 [ 80.380568][ T4306] ? mark_lock+0x94/0x320 [ 80.384899][ T4306] __lock_acquire+0x2c42/0x7d10 [ 80.389857][ T4306] ? verify_lock_unused+0x140/0x140 [ 80.395058][ T4306] ? verify_lock_unused+0x140/0x140 [ 80.400259][ T4306] ? mark_lock+0x94/0x320 [ 80.404685][ T4306] lock_acquire+0x19e/0x400 [ 80.409290][ T4306] ? __flush_work+0xfa/0x210 [ 80.413904][ T4306] ? __lock_acquire+0x7d10/0x7d10 [ 80.419028][ T4306] ? read_lock_is_recursive+0x10/0x10 [ 80.424408][ T4306] ? start_flush_work+0x776/0x820 [ 80.429438][ T4306] __flush_work+0x116/0x210 [ 80.433940][ T4306] ? __flush_work+0xfa/0x210 [ 80.438544][ T4306] ? flush_work+0x20/0x20 [ 80.442872][ T4306] ? try_to_grab_pending+0xfa/0x7f0 [ 80.448070][ T4306] ? mark_lock+0x94/0x320 [ 80.452412][ T4306] ? lockdep_hardirqs_on_prepare+0x409/0x770 [ 80.458402][ T4306] ? lock_chain_count+0x20/0x20 [ 80.463265][ T4306] ? mark_lock+0x94/0x320 [ 80.467630][ T4306] ? __cancel_work_timer+0x36a/0x560 [ 80.472932][ T4306] __cancel_work_timer+0x3f4/0x560 [ 80.478064][ T4306] ? cancel_work_sync+0x20/0x20 [ 80.482923][ T4306] ? __cancel_work+0x1f9/0x2e0 [ 80.487696][ T4306] ? lockdep_hardirqs_on+0x94/0x140 [ 80.492908][ T4306] ? __cancel_work+0x27b/0x2e0 [ 80.497673][ T4306] ? cancel_work+0x20/0x20 [ 80.502091][ T4306] ? lock_chain_count+0x20/0x20 [ 80.506947][ T4306] hci_request_cancel_all+0xcc/0x300 [ 80.512323][ T4306] hci_dev_do_close+0x4e/0x1030 [ 80.517180][ T4306] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 80.523081][ T4306] ? _raw_spin_unlock+0x40/0x40 [ 80.528118][ T4306] hci_rfkill_set_block+0x10a/0x190 [ 80.533404][ T4306] ? rcu_lock_release+0x20/0x20 [ 80.538256][ T4306] rfkill_set_block+0x1c9/0x3d0 [ 80.543114][ T4306] rfkill_fop_write+0x452/0x560 [ 80.547968][ T4306] ? rfkill_fop_read+0x520/0x520 [ 80.552909][ T4306] ? common_file_perm+0x140/0x1c0 [ 80.558026][ T4306] ? fsnotify_perm+0x5d/0x560 [ 80.562762][ T4306] ? security_file_permission+0x75/0xa0 [ 80.568309][ T4306] ? rfkill_fop_read+0x520/0x520 [ 80.573249][ T4306] vfs_write+0x30b/0xd60 [ 80.577498][ T4306] ? file_end_write+0x250/0x250 [ 80.582356][ T4306] ? __context_tracking_exit+0x4c/0x80 [ 80.587995][ T4306] ? __lock_acquire+0x7d10/0x7d10 [ 80.593160][ T4306] ? __fdget_pos+0x1e2/0x370 [ 80.597779][ T4306] ksys_write+0x152/0x260 [ 80.602131][ T4306] ? __ia32_sys_read+0x80/0x80 [ 80.606907][ T4306] ? lockdep_hardirqs_on+0x94/0x140 [ 80.612374][ T4306] do_syscall_64+0x4c/0xa0 [ 80.616794][ T4306] ? clear_bhb_loop+0x30/0x80 [ 80.621477][ T4306] ? clear_bhb_loop+0x30/0x80 [ 80.626162][ T4306] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 80.632061][ T4306] RIP: 0033:0x7f5fdf52cdd9 [ 80.636490][ T4306] 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 [ 80.656279][ T4306] RSP: 002b:00007ffdf64933f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 80.664920][ T4306] RAX: ffffffffffffffda RBX: 00007f5fdf7a5fa0 RCX: 00007f5fdf52cdd9 [ 80.672995][ T4306] RDX: 0000000000000008 RSI: 0000200000000080 RDI: 0000000000000003 [ 80.681079][ T4306] RBP: 00007f5fdf5c2d69 R08: 0000000000000000 R09: 0000000000000000 [ 80.689145][ T4306] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 80.697122][ T4306] R13: 00007f5fdf7a5fac R14: 00007f5fdf7a5fa0 R15: 00007f5fdf7a5fa0 [ 80.705187][ T4306] [ 80.721451][ T3521] Bluetooth: hci0: command 0x040f tx timeout