no interfaces have a carrier [ 43.503065][ T3851] 8021q: adding VLAN 0 to HW filter on device bond0 [ 43.516782][ T3851] eql: remember to turn off Van-Jacobson compression on your slave devices Starting crond: OK Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.121' (ED25519) to the list of known hosts. 2026/10/04 07:27:18 parsed 1 programs 2026/10/04 07:27:18 serving rpc on tcp://41173 syzkaller login: [ 68.078267][ T4198] cgroup: Unknown subsys name 'net' [ 68.211561][ T4198] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 69.833433][ T4198] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 71.629539][ T1432] ieee802154 phy0 wpan0: encryption failed: -22 [ 71.637054][ T1432] ieee802154 phy1 wpan1: encryption failed: -22 [ 71.738143][ T4220] syz-executor (4220) used greatest stack depth: 20912 bytes left [ 72.233208][ T4240] chnl_net:caif_netlink_parms(): no params data found [ 72.306090][ T4240] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.315144][ T4240] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.324078][ T4240] device bridge_slave_0 entered promiscuous mode [ 72.335179][ T4240] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.342600][ T4240] bridge0: port 2(bridge_slave_1) entered disabled state [ 72.351819][ T4240] device bridge_slave_1 entered promiscuous mode [ 72.378110][ T4240] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 72.390023][ T4240] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 72.418300][ T4240] team0: Port device team_slave_0 added [ 72.427437][ T4240] team0: Port device team_slave_1 added [ 72.450048][ T4240] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 72.457159][ T4240] 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. [ 72.483950][ T4240] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 72.497752][ T4240] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 72.504985][ T4240] 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. [ 72.532958][ T4240] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 72.573274][ T4240] device hsr_slave_0 entered promiscuous mode [ 72.580479][ T4240] device hsr_slave_1 entered promiscuous mode [ 72.724559][ T4240] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 72.741318][ T4240] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 72.752440][ T4240] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 72.765793][ T4240] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 72.861670][ T4240] 8021q: adding VLAN 0 to HW filter on device bond0 [ 72.878957][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 72.892430][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 72.907233][ T4240] 8021q: adding VLAN 0 to HW filter on device team0 [ 72.919575][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 72.930566][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 72.941354][ T144] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.949037][ T144] bridge0: port 1(bridge_slave_0) entered forwarding state [ 72.971132][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 72.980055][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 72.990245][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 73.001308][ T144] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.009324][ T144] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.019097][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 73.038879][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 73.048283][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 73.057581][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 73.067099][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 73.085511][ T4240] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 73.098011][ T4240] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 73.112358][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 73.122386][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 73.132547][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 73.142891][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 73.154165][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 73.163655][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 73.172868][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 73.300974][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 73.312103][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 73.331261][ T4240] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 73.362768][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 73.374387][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 73.400963][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 73.410061][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 73.426537][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 73.434815][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 73.450267][ T4240] device veth0_vlan entered promiscuous mode [ 73.469676][ T4240] device veth1_vlan entered promiscuous mode [ 73.494805][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 73.506652][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 73.517294][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 73.528108][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 73.539582][ T4240] device veth0_macvtap entered promiscuous mode [ 73.551664][ T4240] device veth1_macvtap entered promiscuous mode [ 73.570309][ T4240] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 73.579678][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 73.588121][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 73.598043][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 73.609294][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 73.622955][ T4240] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 73.635312][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 73.644299][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 73.654641][ T4240] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.665046][ T4240] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.674430][ T4240] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.685737][ T4240] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.788314][ T4240] syz-executor (4240) used greatest stack depth: 20224 bytes left [ 74.252869][ T154] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.270704][ T154] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.292254][ T154] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.298280][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 74.302114][ T154] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.316724][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2026/10/04 07:27:27 executed programs: 0 [ 75.924671][ T4300] chnl_net:caif_netlink_parms(): no params data found [ 75.987206][ T4300] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.995239][ T4300] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.003659][ T4300] device bridge_slave_0 entered promiscuous mode [ 76.013117][ T4300] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.020364][ T4300] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.028506][ T4300] device bridge_slave_1 entered promiscuous mode [ 76.049570][ T4300] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 76.064354][ T4300] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 76.087964][ T4300] team0: Port device team_slave_0 added [ 76.097050][ T4300] team0: Port device team_slave_1 added [ 76.119059][ T4300] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 76.126195][ T4300] 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. [ 76.154128][ T4300] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 76.167705][ T4300] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 76.174866][ T4300] 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. [ 76.201484][ T4300] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 76.236610][ T4300] device hsr_slave_0 entered promiscuous mode [ 76.243791][ T4300] device hsr_slave_1 entered promiscuous mode [ 76.251395][ T4300] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 76.261359][ T4300] Cannot create hsr debugfs directory [ 76.309486][ T697] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 77.796712][ T21] Bluetooth: hci0: command 0x0409 tx timeout [ 78.331595][ T697] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 78.381634][ T697] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 78.453146][ T697] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 79.338962][ T4300] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 79.350384][ T4300] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 79.378756][ T4300] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 79.389829][ T4300] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 79.482784][ T4300] 8021q: adding VLAN 0 to HW filter on device bond0 [ 79.498323][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 79.508216][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 79.520553][ T4300] 8021q: adding VLAN 0 to HW filter on device team0 [ 79.537647][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 79.547993][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 79.558235][ T144] bridge0: port 1(bridge_slave_0) entered blocking state [ 79.566174][ T144] bridge0: port 1(bridge_slave_0) entered forwarding state [ 79.578371][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 79.603216][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 79.612184][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 79.622293][ T144] bridge0: port 2(bridge_slave_1) entered blocking state [ 79.629425][ T144] bridge0: port 2(bridge_slave_1) entered forwarding state [ 79.664483][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 79.676932][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 79.710611][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 79.720458][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 79.730240][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 79.743145][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 79.752027][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 79.778462][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 79.788611][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 79.800045][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 79.809320][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 79.821521][ T4300] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 79.865727][ T1324] Bluetooth: hci0: command 0x041b tx timeout [ 79.935244][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 79.943637][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 79.958782][ T4300] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 79.984152][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 79.993511][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 80.023372][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 80.032609][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 80.042324][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 80.051389][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 80.073303][ T4300] device veth0_vlan entered promiscuous mode [ 80.088940][ T697] device hsr_slave_0 left promiscuous mode [ 80.095564][ T697] device hsr_slave_1 left promiscuous mode [ 80.103101][ T697] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 80.111399][ T697] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 80.121926][ T697] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 80.130295][ T697] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 80.138654][ T697] device bridge_slave_1 left promiscuous mode [ 80.145855][ T697] bridge0: port 2(bridge_slave_1) entered disabled state [ 80.160587][ T697] device bridge_slave_0 left promiscuous mode [ 80.166968][ T697] bridge0: port 1(bridge_slave_0) entered disabled state [ 80.184059][ T697] device veth1_macvtap left promiscuous mode [ 80.190564][ T697] device veth0_macvtap left promiscuous mode [ 80.197754][ T697] device veth1_vlan left promiscuous mode [ 80.204150][ T697] device veth0_vlan left promiscuous mode [ 80.364267][ T697] team0 (unregistering): Port device team_slave_1 removed [ 80.377732][ T697] team0 (unregistering): Port device team_slave_0 removed [ 80.391044][ T697] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 80.409665][ T697] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 80.463298][ T697] bond0 (unregistering): Released all slaves [ 80.485739][ T4300] device veth1_vlan entered promiscuous mode [ 80.511797][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 80.521388][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 80.530964][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 80.539724][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 80.550778][ T4300] device veth0_macvtap entered promiscuous mode [ 80.563873][ T4300] device veth1_macvtap entered promiscuous mode [ 80.591072][ T4300] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 80.599834][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 80.611081][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 80.620068][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 80.632584][ T4300] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 80.640424][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 80.649844][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 80.662536][ T4300] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 80.674378][ T4300] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 80.683594][ T4300] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 80.692898][ T4300] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 80.758192][ T1283] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 80.769413][ T1283] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 80.779064][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 80.804325][ T144] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 80.819534][ T144] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 80.828950][ T4343] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 80.926276][ T4344] [ 80.928663][ T4344] ====================================================== [ 80.935703][ T4344] WARNING: possible circular locking dependency detected [ 80.942932][ T4344] syzkaller #0 Not tainted [ 80.947511][ T4344] ------------------------------------------------------ [ 80.955367][ T4344] syz.0.17/4344 is trying to acquire lock: [ 80.962080][ T4344] ffff88805a2a5028 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xfa/0x210 [ 80.974091][ T4344] [ 80.974091][ T4344] but task is already holding lock: [ 80.983436][ T4344] ffffffff8d6d76c8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x1ae/0x560 [ 80.993971][ T4344] [ 80.993971][ T4344] which lock already depends on the new lock. [ 80.993971][ T4344] [ 81.004393][ T4344] [ 81.004393][ T4344] the existing dependency chain (in reverse order) is: [ 81.013591][ T4344] [ 81.013591][ T4344] -> #4 (rfkill_global_mutex){+.+.}-{3:3}: [ 81.022426][ T4344] __mutex_lock_common+0x1e5/0x2400 [ 81.028936][ T4344] mutex_lock_nested+0x17/0x20 [ 81.034865][ T4344] rfkill_register+0x2f/0x970 [ 81.041756][ T4344] hci_register_dev+0x459/0x980 [ 81.047951][ T4344] vhci_create_device+0x32e/0x5c0 [ 81.055935][ T4344] vhci_write+0x389/0x440 [ 81.062479][ T4344] vfs_write+0x748/0xd70 [ 81.068215][ T4344] ksys_write+0x153/0x260 [ 81.073364][ T4344] do_syscall_64+0x4c/0xa0 [ 81.078468][ T4344] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 81.085265][ T4344] [ 81.085265][ T4344] -> #3 (&data->open_mutex){+.+.}-{3:3}: [ 81.094258][ T4344] __mutex_lock_common+0x1e5/0x2400 [ 81.100510][ T4344] mutex_lock_nested+0x17/0x20 [ 81.105993][ T4344] vhci_send_frame+0x88/0x100 [ 81.111207][ T4344] hci_send_frame+0x1a9/0x2e0 [ 81.116529][ T4344] hci_tx_work+0x9b5/0x16d0 [ 81.121652][ T4344] process_one_work+0x867/0xff0 [ 81.127109][ T4344] worker_thread+0xad7/0x12a0 [ 81.132556][ T4344] kthread+0x42e/0x520 [ 81.137331][ T4344] ret_from_fork+0x1f/0x30 [ 81.142408][ T4344] [ 81.142408][ T4344] -> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}: [ 81.151702][ T4344] __flush_work+0x116/0x210 [ 81.157302][ T4344] hci_dev_do_close+0x201/0x1020 [ 81.163008][ T4344] hci_unregister_dev+0x2eb/0x590 [ 81.169075][ T4344] vhci_release+0x73/0xc0 [ 81.174042][ T4344] __fput+0x212/0x8c0 [ 81.178547][ T4344] task_work_run+0x125/0x1a0 [ 81.183922][ T4344] do_exit+0x635/0x2110 [ 81.188685][ T4344] do_group_exit+0x12c/0x2f0 [ 81.193878][ T4344] get_signal+0x7eb/0x12e0 [ 81.198910][ T4344] arch_do_signal_or_restart+0xe6/0x12a0 [ 81.205501][ T4344] exit_to_user_mode_loop+0x9e/0x130 [ 81.211611][ T4344] exit_to_user_mode_prepare+0xee/0x180 [ 81.218130][ T4344] syscall_exit_to_user_mode+0x16/0x40 [ 81.224496][ T4344] do_syscall_64+0x58/0xa0 [ 81.229718][ T4344] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 81.237022][ T4344] [ 81.237022][ T4344] -> #1 (&hdev->req_lock){+.+.}-{3:3}: [ 81.247575][ T4344] __mutex_lock_common+0x1e5/0x2400 [ 81.255526][ T4344] mutex_lock_nested+0x17/0x20 [ 81.261578][ T4344] bg_scan_update+0x44/0x3b0 [ 81.272911][ T4344] process_one_work+0x867/0xff0 [ 81.278572][ T4344] worker_thread+0xad7/0x12a0 [ 81.284402][ T4344] kthread+0x42e/0x520 [ 81.289530][ T4344] ret_from_fork+0x1f/0x30 [ 81.294713][ T4344] [ 81.294713][ T4344] -> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}: [ 81.308717][ T4344] __lock_acquire+0x38f7/0x7d40 [ 81.314984][ T4344] lock_acquire+0x19f/0x400 [ 81.320792][ T4344] __flush_work+0x116/0x210 [ 81.327470][ T4344] __cancel_work_timer+0x3f4/0x560 [ 81.334515][ T4344] hci_request_cancel_all+0xcc/0x300 [ 81.340682][ T4344] hci_dev_do_close+0x4e/0x1020 [ 81.346181][ T4344] hci_rfkill_set_block+0x101/0x180 [ 81.351917][ T4344] rfkill_set_block+0x1c1/0x3c0 [ 81.357577][ T4344] rfkill_fop_write+0x453/0x560 [ 81.363313][ T4344] vfs_write+0x304/0xd70 [ 81.368351][ T4344] ksys_write+0x153/0x260 [ 81.373282][ T4344] do_syscall_64+0x4c/0xa0 [ 81.378221][ T4344] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 81.384635][ T4344] [ 81.384635][ T4344] other info that might help us debug this: [ 81.384635][ T4344] [ 81.394868][ T4344] Chain exists of: [ 81.394868][ T4344] (work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex [ 81.394868][ T4344] [ 81.411410][ T4344] Possible unsafe locking scenario: [ 81.411410][ T4344] [ 81.419135][ T4344] CPU0 CPU1 [ 81.424503][ T4344] ---- ---- [ 81.430146][ T4344] lock(rfkill_global_mutex); [ 81.435021][ T4344] lock(&data->open_mutex); [ 81.442148][ T4344] lock(rfkill_global_mutex); [ 81.449621][ T4344] lock((work_completion)(&hdev->bg_scan_update)); [ 81.456744][ T4344] [ 81.456744][ T4344] *** DEADLOCK *** [ 81.456744][ T4344] [ 81.464987][ T4344] 1 lock held by syz.0.17/4344: [ 81.469936][ T4344] #0: ffffffff8d6d76c8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x1ae/0x560 [ 81.480965][ T4344] [ 81.480965][ T4344] stack backtrace: [ 81.487208][ T4344] CPU: 1 PID: 4344 Comm: syz.0.17 Not tainted syzkaller #0 [ 81.494577][ T4344] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 [ 81.504824][ T4344] Call Trace: [ 81.508127][ T4344] [ 81.511303][ T4344] dump_stack_lvl+0x188/0x250 [ 81.516010][ T4344] ? load_image+0x410/0x410 [ 81.520828][ T4344] ? show_regs_print_info+0x20/0x20 [ 81.526156][ T4344] ? print_circular_bug+0x12b/0x1a0 [ 81.531647][ T4344] check_noncircular+0x2f8/0x400 [ 81.536593][ T4344] ? look_up_lock_class+0x71/0x110 [ 81.541985][ T4344] ? print_deadlock_bug+0x5d0/0x5d0 [ 81.547449][ T4344] ? lockdep_lock+0xf1/0x1f0 [ 81.553011][ T4344] ? __lock_acquire+0x12df/0x7d40 [ 81.558769][ T4344] ? mark_lock+0x94/0x320 [ 81.563470][ T4344] ? _find_first_zero_bit+0xd1/0xf0 [ 81.568986][ T4344] __lock_acquire+0x38f7/0x7d40 [ 81.574110][ T4344] ? verify_lock_unused+0x140/0x140 [ 81.579861][ T4344] ? verify_lock_unused+0x140/0x140 [ 81.585329][ T4344] lock_acquire+0x19f/0x400 [ 81.589840][ T4344] ? __flush_work+0xfa/0x210 [ 81.594527][ T4344] ? __lock_acquire+0x7d40/0x7d40 [ 81.600004][ T4344] ? read_lock_is_recursive+0x10/0x10 [ 81.605393][ T4344] ? start_flush_work+0x784/0x830 [ 81.610547][ T4344] __flush_work+0x116/0x210 [ 81.615394][ T4344] ? __flush_work+0xfa/0x210 [ 81.619989][ T4344] ? flush_work+0x20/0x20 [ 81.624498][ T4344] ? try_to_grab_pending+0xfb/0x820 [ 81.629811][ T4344] ? mark_lock+0x94/0x320 [ 81.634249][ T4344] ? lockdep_hardirqs_on_prepare+0x448/0x7c0 [ 81.640231][ T4344] ? lock_chain_count+0x20/0x20 [ 81.645085][ T4344] ? mark_lock+0x94/0x320 [ 81.649526][ T4344] ? __cancel_work_timer+0x36a/0x560 [ 81.654982][ T4344] __cancel_work_timer+0x3f4/0x560 [ 81.660266][ T4344] ? cancel_work_sync+0x20/0x20 [ 81.665207][ T4344] ? __cancel_work+0x1f9/0x2e0 [ 81.669969][ T4344] ? lockdep_hardirqs_on+0x94/0x140 [ 81.675345][ T4344] ? __cancel_work+0x27b/0x2e0 [ 81.680284][ T4344] ? cancel_work+0x20/0x20 [ 81.685146][ T4344] hci_request_cancel_all+0xcc/0x300 [ 81.691334][ T4344] hci_dev_do_close+0x4e/0x1020 [ 81.696298][ T4344] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 81.702543][ T4344] ? _raw_spin_unlock+0x40/0x40 [ 81.707835][ T4344] hci_rfkill_set_block+0x101/0x180 [ 81.713040][ T4344] ? rcu_lock_release+0x20/0x20 [ 81.718168][ T4344] rfkill_set_block+0x1c1/0x3c0 [ 81.723114][ T4344] rfkill_fop_write+0x453/0x560 [ 81.728159][ T4344] ? rfkill_fop_read+0x560/0x560 [ 81.733356][ T4344] ? common_file_perm+0x150/0x1c0 [ 81.738485][ T4344] ? fsnotify_perm+0x5d/0x560 [ 81.743713][ T4344] ? security_file_permission+0x75/0xa0 [ 81.749955][ T4344] ? rfkill_fop_read+0x560/0x560 [ 81.755451][ T4344] vfs_write+0x304/0xd70 [ 81.759811][ T4344] ? file_end_write+0x250/0x250 [ 81.764690][ T4344] ? __context_tracking_exit+0x4c/0x80 [ 81.770295][ T4344] ? __fdget_pos+0x1e2/0x370 [ 81.775569][ T4344] ksys_write+0x153/0x260 [ 81.780946][ T4344] ? __ia32_sys_read+0x80/0x80 [ 81.785816][ T4344] ? lockdep_hardirqs_on+0x94/0x140 [ 81.791562][ T4344] do_syscall_64+0x4c/0xa0 [ 81.796387][ T4344] ? clear_bhb_loop+0x30/0x80 [ 81.801801][ T4344] ? clear_bhb_loop+0x30/0x80 [ 81.809623][ T4344] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 81.817686][ T4344] RIP: 0033:0x7f932baaa159 [ 81.822511][ T4344] 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 [ 81.844243][ T4344] RSP: 002b:00007ffc6c3f4618 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 81.854323][ T4344] RAX: ffffffffffffffda RBX: 00007f932bd31fa0 RCX: 00007f932baaa159 [ 81.862748][ T4344] RDX: 0000000000000008 RSI: 0000200000000000 RDI: 0000000000000003 [ 81.870913][ T4344] RBP: 00007f932bb4106b R08: 0000000000000000 R09: 0000000000000000 [ 81.879955][ T4344] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 81.888869][ T4344] R13: 00007f932bd31fac R14: 00007f932bd31fa0 R15: 00007f932bd31fa0 [ 81.897033][ T4344] [ 81.946136][ T4247] Bluetooth: hci0: command 0x040f tx timeout