[ 19.035766][ T3704] eql: remember to turn off Van-Jacobson compression on your slave devices Starting crond: [ 19.077850][ T136] gvnic 0000:00:00.0 enp0s0: Device link is up. [ 19.085129][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s0: link becomes ready OK Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.210' (ED25519) to the list of known hosts. 1970/01/01 00:00:38 ignoring optional flag "sandboxArg"="0" 1970/01/01 00:00:39 parsed 1 programs syzkaller login: [ 41.995130][ T4039] cgroup: Unknown subsys name 'net' [ 42.231452][ T4039] cgroup: Unknown subsys name 'rlimit' [ 42.633474][ T4039] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k SSFS [ 52.871227][ T320] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 52.872418][ T320] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 52.874336][ T320] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 52.885954][ T320] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 52.887148][ T320] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 52.889049][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 53.663479][ T4082] chnl_net:caif_netlink_parms(): no params data found [ 53.704859][ T4082] bridge0: port 1(bridge_slave_0) entered blocking state [ 53.706172][ T4082] bridge0: port 1(bridge_slave_0) entered disabled state [ 53.708091][ T4082] device bridge_slave_0 entered promiscuous mode [ 53.711695][ T4082] bridge0: port 2(bridge_slave_1) entered blocking state [ 53.712806][ T4082] bridge0: port 2(bridge_slave_1) entered disabled state [ 53.714740][ T4082] device bridge_slave_1 entered promiscuous mode [ 53.730504][ T4082] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 53.733792][ T4082] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 53.750594][ T4082] team0: Port device team_slave_0 added [ 53.753218][ T4082] team0: Port device team_slave_1 added [ 53.766109][ T4082] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 53.767123][ T4082] 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. [ 53.771022][ T4082] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 53.774305][ T4082] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 53.775765][ T4082] 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. [ 53.779627][ T4082] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 53.847963][ T4082] device hsr_slave_0 entered promiscuous mode [ 53.905676][ T4082] device hsr_slave_1 entered promiscuous mode [ 54.157011][ T4082] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 54.246128][ T4082] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 54.287405][ T4082] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 54.375344][ T4082] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 54.541348][ T4082] 8021q: adding VLAN 0 to HW filter on device bond0 [ 54.550272][ T320] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 54.552187][ T320] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 54.557120][ T4082] 8021q: adding VLAN 0 to HW filter on device team0 [ 54.561272][ T1598] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 54.562896][ T1598] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 54.564517][ T1598] bridge0: port 1(bridge_slave_0) entered blocking state [ 54.565894][ T1598] bridge0: port 1(bridge_slave_0) entered forwarding state [ 54.576934][ T1598] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 54.578684][ T1598] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 54.580789][ T1598] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 54.582574][ T1598] bridge0: port 2(bridge_slave_1) entered blocking state [ 54.583631][ T1598] bridge0: port 2(bridge_slave_1) entered forwarding state [ 54.593596][ T1598] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 54.597340][ T1598] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 54.604218][ T1598] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 54.609023][ T1598] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 54.619324][ T1598] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 54.622010][ T1598] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 54.624023][ T1598] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 54.628434][ T1598] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 54.630511][ T1598] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 54.636039][ T4082] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 54.638158][ T4082] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 54.644600][ T1598] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 54.648015][ T1598] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 54.713228][ T320] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 54.714655][ T320] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 54.723329][ T4082] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 54.746796][ T320] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 54.759317][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 54.761422][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 54.763187][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 54.768610][ T4082] device veth0_vlan entered promiscuous mode [ 54.774816][ T4082] device veth1_vlan entered promiscuous mode [ 54.796825][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 54.798416][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 54.800269][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 54.804681][ T4082] device veth0_macvtap entered promiscuous mode [ 54.808895][ T4082] device veth1_macvtap entered promiscuous mode [ 54.824689][ T4082] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 54.827421][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 54.829131][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 54.830796][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 54.836662][ T4082] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 54.837891][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 54.839531][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 54.844023][ T4082] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 54.846618][ T4082] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 54.847864][ T4082] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 54.849110][ T4082] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 55.991837][ T136] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:00:56 executed programs: 0 [ 56.637133][ T4135] chnl_net:caif_netlink_parms(): no params data found [ 56.673061][ T4135] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.674125][ T4135] bridge0: port 1(bridge_slave_0) entered disabled state [ 56.676363][ T4135] device bridge_slave_0 entered promiscuous mode [ 56.679328][ T4135] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.680437][ T4135] bridge0: port 2(bridge_slave_1) entered disabled state [ 56.682126][ T4135] device bridge_slave_1 entered promiscuous mode [ 56.697946][ T4135] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 56.701162][ T4135] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 56.716924][ T4135] team0: Port device team_slave_0 added [ 56.719705][ T4135] team0: Port device team_slave_1 added [ 56.731997][ T4135] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 56.733057][ T4135] 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. [ 56.737258][ T4135] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 56.740211][ T4135] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 56.741131][ T4135] 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. [ 56.744883][ T4135] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 56.817298][ T4135] device hsr_slave_0 entered promiscuous mode [ 56.855594][ T4135] device hsr_slave_1 entered promiscuous mode [ 56.895775][ T4135] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 56.897104][ T4135] Cannot create hsr debugfs directory [ 57.732669][ T136] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 58.576035][ T7] Bluetooth: hci0: command 0x0409 tx timeout [ 60.012188][ T136] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 60.093451][ T136] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 60.655409][ T4088] Bluetooth: hci0: command 0x041b tx timeout [ 61.015812][ T4135] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 61.043484][ T4135] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 61.079825][ T4135] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 61.119774][ T4135] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 61.230570][ T4135] 8021q: adding VLAN 0 to HW filter on device bond0 [ 61.239064][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 61.240706][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 61.244456][ T4135] 8021q: adding VLAN 0 to HW filter on device team0 [ 61.250125][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 61.251899][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 61.253610][ T9] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.254863][ T9] bridge0: port 1(bridge_slave_0) entered forwarding state [ 61.257395][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 61.261511][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 61.263506][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 61.265177][ T9] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.266404][ T9] bridge0: port 2(bridge_slave_1) entered forwarding state [ 61.272100][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 61.276601][ T320] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 61.283763][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 61.287172][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 61.291746][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 61.293486][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 61.296346][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 61.300778][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 61.302772][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 61.307696][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 61.309395][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 61.312910][ T4135] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 61.389454][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 61.390680][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 61.396380][ T4135] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 61.409344][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 61.411145][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 61.423366][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 61.425179][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 61.428344][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 61.429957][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 61.433484][ T4135] device veth0_vlan entered promiscuous mode [ 61.441277][ T4135] device veth1_vlan entered promiscuous mode [ 61.457263][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 61.458979][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 61.460691][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 61.462547][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 61.467061][ T4135] device veth0_macvtap entered promiscuous mode [ 61.470800][ T4135] device veth1_macvtap entered promiscuous mode [ 61.480328][ T4135] batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 [ 61.481997][ T4135] batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! [ 61.484276][ T4135] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 61.487941][ T4135] batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 [ 61.489565][ T4135] batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! [ 61.491856][ T4135] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 61.493211][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 61.494928][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 61.497039][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 61.498748][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 61.500493][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 61.502222][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 61.505994][ T4135] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 61.507491][ T4135] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 61.509015][ T4135] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 61.510288][ T4135] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 61.553727][ T320] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 61.554921][ T320] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 61.559990][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 61.571304][ T148] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 61.572534][ T148] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 61.574569][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 61.608856][ T4197] [ 61.609283][ T4197] ====================================================== [ 61.610420][ T4197] WARNING: possible circular locking dependency detected [ 61.611559][ T4197] 5.15.189-syzkaller #0 Not tainted [ 61.612287][ T4197] ------------------------------------------------------ [ 61.613475][ T4197] syz.0.17/4197 is trying to acquire lock: [ 61.614352][ T4197] ffff0000cb1fcc28 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xcc/0x1bc [ 61.616004][ T4197] [ 61.616004][ T4197] but task is already holding lock: [ 61.617245][ T4197] ffff80001651bc28 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x238/0x5cc [ 61.618723][ T4197] [ 61.618723][ T4197] which lock already depends on the new lock. [ 61.618723][ T4197] [ 61.620213][ T4197] [ 61.620213][ T4197] the existing dependency chain (in reverse order) is: [ 61.621708][ T4197] [ 61.621708][ T4197] -> #4 (rfkill_global_mutex){+.+.}-{3:3}: [ 61.622883][ T4197] __mutex_lock_common+0x194/0x1edc [ 61.623872][ T4197] mutex_lock_nested+0xac/0x11c [ 61.624776][ T4197] rfkill_register+0x44/0x77c [ 61.625561][ T4197] hci_register_dev+0x3d8/0x854 [ 61.626430][ T4197] vhci_create_device+0x2bc/0x564 [ 61.627173][ T4197] vhci_write+0x30c/0x3ac [ 61.627936][ T4197] vfs_write+0x7c8/0xa2c [ 61.628635][ T4197] ksys_write+0x120/0x210 [ 61.629407][ T4197] __arm64_sys_write+0x7c/0x90 [ 61.630269][ T4197] invoke_syscall+0x98/0x2b8 [ 61.630997][ T4197] el0_svc_common+0x138/0x258 [ 61.631784][ T4197] do_el0_svc+0x58/0x14c [ 61.632521][ T4197] el0_svc+0x78/0x1e0 [ 61.633134][ T4197] el0t_64_sync_handler+0xcc/0xe4 [ 61.634003][ T4197] el0t_64_sync+0x1a0/0x1a4 [ 61.634767][ T4197] [ 61.634767][ T4197] -> #3 (&data->open_mutex){+.+.}-{3:3}: [ 61.635981][ T4197] __mutex_lock_common+0x194/0x1edc [ 61.636745][ T4197] mutex_lock_nested+0xac/0x11c [ 61.637664][ T4197] vhci_send_frame+0x88/0x118 [ 61.638533][ T4197] hci_send_frame+0x194/0x2f0 [ 61.639313][ T4197] hci_tx_work+0x7e4/0x1394 [ 61.640040][ T4197] process_one_work+0x79c/0x1140 [ 61.640899][ T4197] worker_thread+0x8f4/0x101c [ 61.641662][ T4197] kthread+0x374/0x454 [ 61.642434][ T4197] ret_from_fork+0x10/0x20 [ 61.643147][ T4197] [ 61.643147][ T4197] -> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}: [ 61.644762][ T4197] __flush_work+0xf4/0x1bc [ 61.645478][ T4197] flush_work+0x24/0x38 [ 61.646315][ T4197] hci_dev_do_close+0x164/0x105c [ 61.647135][ T4197] hci_unregister_dev+0x23c/0x4c0 [ 61.648052][ T4197] vhci_release+0x74/0xc4 [ 61.648779][ T4197] __fput+0x1c0/0x7f8 [ 61.649593][ T4197] ____fput+0x20/0x30 [ 61.650223][ T4197] task_work_run+0x12c/0x1e0 [ 61.651052][ T4197] do_exit+0x684/0x1f58 [ 61.651851][ T4197] do_group_exit+0x100/0x268 [ 61.652609][ T4197] get_signal+0x73c/0x1340 [ 61.653376][ T4197] do_notify_resume+0x35c/0x3128 [ 61.654264][ T4197] el0_svc+0xf0/0x1e0 [ 61.654902][ T4197] el0t_64_sync_handler+0xcc/0xe4 [ 61.655763][ T4197] el0t_64_sync+0x1a0/0x1a4 [ 61.656511][ T4197] [ 61.656511][ T4197] -> #1 (&hdev->req_lock){+.+.}-{3:3}: [ 61.657829][ T4197] __mutex_lock_common+0x194/0x1edc [ 61.658742][ T4197] mutex_lock_nested+0xac/0x11c [ 61.659662][ T4197] bg_scan_update+0x48/0x3d0 [ 61.660447][ T4197] process_one_work+0x79c/0x1140 [ 61.661167][ T4197] worker_thread+0x8f4/0x101c [ 61.662064][ T4197] kthread+0x374/0x454 [ 61.662820][ T4197] ret_from_fork+0x10/0x20 [ 61.663615][ T4197] [ 61.663615][ T4197] -> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}: [ 61.665120][ T4197] __lock_acquire+0x2928/0x651c [ 61.665974][ T4197] lock_acquire+0x1f4/0x620 [ 61.666765][ T4197] __flush_work+0xf4/0x1bc [ 61.667495][ T4197] __cancel_work_timer+0x2ec/0x448 [ 61.668444][ T4197] cancel_work_sync+0x24/0x38 [ 61.669191][ T4197] hci_request_cancel_all+0xbc/0x2d0 [ 61.670039][ T4197] hci_dev_do_close+0x54/0x105c [ 61.670916][ T4197] hci_rfkill_set_block+0xdc/0x1d0 [ 61.671755][ T4197] rfkill_set_block+0x18c/0x374 [ 61.672528][ T4197] rfkill_fop_write+0x4a4/0x5cc [ 61.673324][ T4197] vfs_write+0x280/0xa2c [ 61.674119][ T4197] ksys_write+0x120/0x210 [ 61.674903][ T4197] __arm64_sys_write+0x7c/0x90 [ 61.675680][ T4197] invoke_syscall+0x98/0x2b8 [ 61.676570][ T4197] el0_svc_common+0x138/0x258 [ 61.677398][ T4197] do_el0_svc+0x58/0x14c [ 61.678131][ T4197] el0_svc+0x78/0x1e0 [ 61.678761][ T4197] el0t_64_sync_handler+0xcc/0xe4 [ 61.679620][ T4197] el0t_64_sync+0x1a0/0x1a4 [ 61.680340][ T4197] [ 61.680340][ T4197] other info that might help us debug this: [ 61.680340][ T4197] [ 61.681922][ T4197] Chain exists of: [ 61.681922][ T4197] (work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex [ 61.681922][ T4197] [ 61.684302][ T4197] Possible unsafe locking scenario: [ 61.684302][ T4197] [ 61.685427][ T4197] CPU0 CPU1 [ 61.686204][ T4197] ---- ---- [ 61.686971][ T4197] lock(rfkill_global_mutex); [ 61.687769][ T4197] lock(&data->open_mutex); [ 61.688871][ T4197] lock(rfkill_global_mutex); [ 61.690097][ T4197] lock((work_completion)(&hdev->bg_scan_update)); [ 61.691119][ T4197] [ 61.691119][ T4197] *** DEADLOCK *** [ 61.691119][ T4197] [ 61.692578][ T4197] 1 lock held by syz.0.17/4197: [ 61.693454][ T4197] #0: ffff80001651bc28 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x238/0x5cc [ 61.695053][ T4197] [ 61.695053][ T4197] stack backtrace: [ 61.695986][ T4197] CPU: 1 PID: 4197 Comm: syz.0.17 Not tainted 5.15.189-syzkaller #0 [ 61.697205][ T4197] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 61.698854][ T4197] Call trace: [ 61.699425][ T4197] dump_backtrace+0x0/0x43c [ 61.700111][ T4197] show_stack+0x2c/0x3c [ 61.700930][ T4197] __dump_stack+0x30/0x40 [ 61.701600][ T4197] dump_stack_lvl+0xf8/0x160 [ 61.702229][ T4197] dump_stack+0x1c/0x5c [ 61.702830][ T4197] print_circular_bug+0x148/0x1b0 [ 61.703717][ T4197] check_noncircular+0x240/0x2d4 [ 61.704481][ T4197] __lock_acquire+0x2928/0x651c [ 61.705190][ T4197] lock_acquire+0x1f4/0x620 [ 61.705875][ T4197] __flush_work+0xf4/0x1bc [ 61.706555][ T4197] __cancel_work_timer+0x2ec/0x448 [ 61.707250][ T4197] cancel_work_sync+0x24/0x38 [ 61.707914][ T4197] hci_request_cancel_all+0xbc/0x2d0 [ 61.708730][ T4197] hci_dev_do_close+0x54/0x105c [ 61.709433][ T4197] hci_rfkill_set_block+0xdc/0x1d0 [ 61.710236][ T4197] rfkill_set_block+0x18c/0x374 [ 61.711168][ T4197] rfkill_fop_write+0x4a4/0x5cc [ 61.711906][ T4197] vfs_write+0x280/0xa2c [ 61.712675][ T4197] ksys_write+0x120/0x210 [ 61.713365][ T4197] __arm64_sys_write+0x7c/0x90 [ 61.714148][ T4197] invoke_syscall+0x98/0x2b8 [ 61.714851][ T4197] el0_svc_common+0x138/0x258 [ 61.715723][ T4197] do_el0_svc+0x58/0x14c [ 61.716416][ T4197] el0_svc+0x78/0x1e0 [ 61.717088][ T4197] el0t_64_sync_handler+0xcc/0xe4 [ 61.717877][ T4197] el0t_64_sync+0x1a0/0x1a4