no interfaces have a carrier [ 44.839581][ T3852] 8021q: adding VLAN 0 to HW filter on device bond0 [ 44.849634][ T3852] eql: remember to turn off Van-Jacobson compression on your slave devices Starting crond: OK Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.129' (ED25519) to the list of known hosts. 2026/08/09 02:28:27 parsed 1 programs 2026/08/09 02:28:27 serving rpc on tcp://40411 syzkaller login: [ 74.286533][ T4198] cgroup: Unknown subsys name 'net' [ 74.428404][ T4198] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 76.003400][ T4198] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 77.612316][ T1246] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.620636][ T1246] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.630201][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 77.661080][ T1269] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.669967][ T1269] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.677907][ T1246] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 78.662774][ T4242] chnl_net:caif_netlink_parms(): no params data found [ 78.730658][ T4242] bridge0: port 1(bridge_slave_0) entered blocking state [ 78.738710][ T4242] bridge0: port 1(bridge_slave_0) entered disabled state [ 78.747267][ T4242] device bridge_slave_0 entered promiscuous mode [ 78.757575][ T4242] bridge0: port 2(bridge_slave_1) entered blocking state [ 78.764947][ T4242] bridge0: port 2(bridge_slave_1) entered disabled state [ 78.773470][ T4242] device bridge_slave_1 entered promiscuous mode [ 78.800589][ T4242] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 78.812905][ T4242] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 78.842355][ T4242] team0: Port device team_slave_0 added [ 78.850572][ T4242] team0: Port device team_slave_1 added [ 78.873861][ T4242] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 78.881401][ T4242] 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. [ 78.907598][ T4242] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 78.920870][ T4242] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 78.927943][ T4242] 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. [ 78.954381][ T4242] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 78.995866][ T4242] device hsr_slave_0 entered promiscuous mode [ 79.002927][ T4242] device hsr_slave_1 entered promiscuous mode [ 79.142963][ T4242] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 79.155459][ T4242] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 79.166946][ T4242] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 79.178287][ T4242] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 79.214849][ T4242] bridge0: port 2(bridge_slave_1) entered blocking state [ 79.222499][ T4242] bridge0: port 2(bridge_slave_1) entered forwarding state [ 79.230970][ T4242] bridge0: port 1(bridge_slave_0) entered blocking state [ 79.238250][ T4242] bridge0: port 1(bridge_slave_0) entered forwarding state [ 79.305778][ T4242] 8021q: adding VLAN 0 to HW filter on device bond0 [ 79.324326][ T1246] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 79.335519][ T1246] bridge0: port 1(bridge_slave_0) entered disabled state [ 79.346620][ T1246] bridge0: port 2(bridge_slave_1) entered disabled state [ 79.355258][ T1246] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 79.371283][ T4242] 8021q: adding VLAN 0 to HW filter on device team0 [ 79.389847][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 79.400230][ T1269] bridge0: port 1(bridge_slave_0) entered blocking state [ 79.407435][ T1269] bridge0: port 1(bridge_slave_0) entered forwarding state [ 79.416724][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 79.430469][ T1269] bridge0: port 2(bridge_slave_1) entered blocking state [ 79.438147][ T1269] bridge0: port 2(bridge_slave_1) entered forwarding state [ 79.460158][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 79.470606][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 79.489511][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 79.499623][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 79.516509][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 79.526846][ T4242] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 79.654655][ T1246] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 79.662370][ T1246] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 79.678109][ T4242] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 79.698768][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 79.708916][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 79.731974][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 79.742457][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 79.752803][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 79.763154][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 79.780678][ T4242] device veth0_vlan entered promiscuous mode [ 79.812367][ T4242] device veth1_vlan entered promiscuous mode [ 79.878731][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 79.888682][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 79.896895][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 79.906327][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 79.919443][ T4242] device veth0_macvtap entered promiscuous mode [ 79.930373][ T4242] device veth1_macvtap entered promiscuous mode [ 79.948552][ T4242] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 79.958489][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 79.966769][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 79.975454][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 79.985884][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 79.998060][ T4242] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 80.009164][ T4242] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 80.018277][ T4242] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 80.027017][ T4242] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 80.036355][ T4242] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 80.048074][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 80.057135][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 80.172301][ T4242] syz-executor (4242) used greatest stack depth: 20912 bytes left 2026/08/09 02:28:38 executed programs: 0 [ 82.161304][ T4293] chnl_net:caif_netlink_parms(): no params data found [ 82.217889][ T4293] bridge0: port 1(bridge_slave_0) entered blocking state [ 82.225083][ T4293] bridge0: port 1(bridge_slave_0) entered disabled state [ 82.233352][ T4293] device bridge_slave_0 entered promiscuous mode [ 82.242205][ T4293] bridge0: port 2(bridge_slave_1) entered blocking state [ 82.249570][ T4293] bridge0: port 2(bridge_slave_1) entered disabled state [ 82.257821][ T4293] device bridge_slave_1 entered promiscuous mode [ 82.282037][ T4293] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 82.294764][ T4293] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 82.324516][ T4293] team0: Port device team_slave_0 added [ 82.332940][ T4293] team0: Port device team_slave_1 added [ 82.358924][ T4293] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 82.365936][ 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. [ 82.392205][ T4293] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 82.405437][ T4293] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 82.412621][ 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. [ 82.438857][ T4293] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 82.471907][ T4293] device hsr_slave_0 entered promiscuous mode [ 82.479481][ T4293] device hsr_slave_1 entered promiscuous mode [ 82.486429][ T4293] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 82.494458][ T4293] Cannot create hsr debugfs directory [ 82.601264][ T4293] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 84.098310][ T4255] Bluetooth: hci0: command 0x0409 tx timeout [ 84.755651][ T4293] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 84.814663][ T4293] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 84.876832][ T4293] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 85.020051][ T4293] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 85.031024][ T4293] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 85.060788][ T4293] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 85.072230][ T4293] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 85.136100][ T4293] 8021q: adding VLAN 0 to HW filter on device bond0 [ 85.168705][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 85.176588][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 85.188187][ T4293] 8021q: adding VLAN 0 to HW filter on device team0 [ 85.201321][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 85.210749][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 85.219876][ T154] bridge0: port 1(bridge_slave_0) entered blocking state [ 85.226976][ T154] bridge0: port 1(bridge_slave_0) entered forwarding state [ 85.235322][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 85.245097][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 85.253833][ T154] bridge0: port 2(bridge_slave_1) entered blocking state [ 85.260942][ T154] bridge0: port 2(bridge_slave_1) entered forwarding state [ 85.270247][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 85.283344][ T1246] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 85.329253][ T1246] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 85.342326][ T1246] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 85.351472][ T1246] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 85.360813][ T1246] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 85.396155][ T1246] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 85.405595][ T1246] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 85.416256][ T1246] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 85.424966][ T1246] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 85.436679][ T1246] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 85.445633][ T1246] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 85.458255][ T4293] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 85.585918][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 85.595745][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 85.611385][ T9] device hsr_slave_0 left promiscuous mode [ 85.619150][ T9] device hsr_slave_1 left promiscuous mode [ 85.625760][ T9] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 85.633686][ T9] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 85.644482][ T9] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 85.652159][ T9] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 85.660311][ T9] device bridge_slave_1 left promiscuous mode [ 85.667226][ T9] bridge0: port 2(bridge_slave_1) entered disabled state [ 85.681994][ T9] device bridge_slave_0 left promiscuous mode [ 85.689739][ T9] bridge0: port 1(bridge_slave_0) entered disabled state [ 85.709398][ T9] device veth1_macvtap left promiscuous mode [ 85.716140][ T9] device veth0_macvtap left promiscuous mode [ 85.722891][ T9] device veth1_vlan left promiscuous mode [ 85.730916][ T9] device veth0_vlan left promiscuous mode [ 85.921857][ T9] team0 (unregistering): Port device team_slave_1 removed [ 85.935811][ T9] team0 (unregistering): Port device team_slave_0 removed [ 85.949659][ T9] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 85.966352][ T9] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 86.026945][ T9] bond0 (unregistering): Released all slaves [ 86.084666][ T4293] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 86.118193][ T1246] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 86.126999][ T1246] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 86.149195][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 86.158181][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 86.173403][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 86.181795][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 86.190011][ T4309] Bluetooth: hci0: command 0x041b tx timeout [ 86.199406][ T4293] device veth0_vlan entered promiscuous mode [ 86.213998][ T4293] device veth1_vlan entered promiscuous mode [ 86.235580][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 86.244240][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 86.257771][ T4293] device veth0_macvtap entered promiscuous mode [ 86.268789][ T4293] device veth1_macvtap entered promiscuous mode [ 86.293084][ T4293] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 86.300960][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 86.309457][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 86.317905][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 86.326647][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 86.341387][ T4293] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 86.350944][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 86.360066][ T1269] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 86.373762][ T4293] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 86.383548][ T4293] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 86.392514][ T4293] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 86.401532][ T4293] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 86.472332][ T1246] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 86.492595][ T1269] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 86.493533][ T1246] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 86.506202][ T1269] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 86.516089][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 86.524311][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 86.822552][ T1326] cfg80211: failed to load regulatory.db [ 88.268162][ T4219] Bluetooth: hci0: command 0x040f tx timeout [ 89.600107][ T4322] nci: __nci_request: wait_for_completion_interruptible_timeout failed -512 [ 89.612488][ T4317] nci: __nci_request: wait_for_completion_interruptible_timeout failed -512 [ 89.622376][ T4317] [ 89.624737][ T4317] ====================================================== [ 89.632073][ T4317] WARNING: possible circular locking dependency detected [ 89.639130][ T4317] syzkaller #0 Not tainted [ 89.643561][ T4317] ------------------------------------------------------ [ 89.650711][ T4317] syz.0.17/4317 is trying to acquire lock: [ 89.656841][ T4317] ffffffff8cb63968 (nci_mutex){+.+.}-{3:3}, at: virtual_nci_close+0x13/0x40 [ 89.665658][ T4317] [ 89.665658][ T4317] but task is already holding lock: [ 89.673196][ T4317] ffff88807bf73350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_close_device+0x102/0x600 [ 89.682518][ T4317] [ 89.682518][ T4317] which lock already depends on the new lock. [ 89.682518][ T4317] [ 89.692950][ T4317] [ 89.692950][ T4317] the existing dependency chain (in reverse order) is: [ 89.701994][ T4317] [ 89.701994][ T4317] -> #3 (&ndev->req_lock){+.+.}-{3:3}: [ 89.709652][ T4317] __mutex_lock_common+0x1e5/0x2400 [ 89.715403][ T4317] mutex_lock_nested+0x17/0x20 [ 89.720718][ T4317] nci_start_poll+0x8c8/0xcc0 [ 89.726335][ T4317] nfc_start_poll+0x141/0x2c0 [ 89.731857][ T4317] nfc_genl_start_poll+0x1d7/0x340 [ 89.737509][ T4317] genl_rcv_msg+0xd0b/0xfa0 [ 89.742561][ T4317] netlink_rcv_skb+0x1e9/0x430 [ 89.747948][ T4317] genl_rcv+0x24/0x40 [ 89.752481][ T4317] netlink_unicast+0x78f/0x940 [ 89.757881][ T4317] netlink_sendmsg+0x8ba/0xbe0 [ 89.763300][ T4317] ____sys_sendmsg+0x5be/0x8f0 [ 89.768595][ T4317] ___sys_sendmsg+0x236/0x2e0 [ 89.773891][ T4317] __se_sys_sendmsg+0x1b7/0x2a0 [ 89.779464][ T4317] do_syscall_64+0x4c/0xa0 [ 89.784438][ T4317] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 89.790865][ T4317] [ 89.790865][ T4317] -> #2 (&genl_data->genl_data_mutex){+.+.}-{3:3}: [ 89.799580][ T4317] __mutex_lock_common+0x1e5/0x2400 [ 89.805312][ T4317] mutex_lock_nested+0x17/0x20 [ 89.810610][ T4317] nfc_urelease_event_work+0x120/0x310 [ 89.816621][ T4317] process_one_work+0x867/0xff0 [ 89.822023][ T4317] worker_thread+0xad7/0x12a0 [ 89.827329][ T4317] kthread+0x42e/0x520 [ 89.831957][ T4317] ret_from_fork+0x1f/0x30 [ 89.836975][ T4317] [ 89.836975][ T4317] -> #1 (nfc_devlist_mutex){+.+.}-{3:3}: [ 89.844809][ T4317] __mutex_lock_common+0x1e5/0x2400 [ 89.850872][ T4317] mutex_lock_nested+0x17/0x20 [ 89.856189][ T4317] nfc_register_device+0x38/0x300 [ 89.861748][ T4317] nci_register_device+0x89f/0x9f0 [ 89.867401][ T4317] virtual_ncidev_open+0x55/0xc0 [ 89.872892][ T4317] misc_open+0x31f/0x390 [ 89.877762][ T4317] chrdev_open+0x585/0x5f0 [ 89.882726][ T4317] do_dentry_open+0x7f7/0xf90 [ 89.887930][ T4317] path_openat+0x2718/0x2fb0 [ 89.893047][ T4317] do_filp_open+0x1df/0x400 [ 89.898206][ T4317] do_sys_openat2+0x14b/0x500 [ 89.903424][ T4317] __x64_sys_openat+0x135/0x160 [ 89.908813][ T4317] do_syscall_64+0x4c/0xa0 [ 89.913750][ T4317] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 89.920170][ T4317] [ 89.920170][ T4317] -> #0 (nci_mutex){+.+.}-{3:3}: [ 89.927565][ T4317] __lock_acquire+0x2c66/0x7b50 [ 89.932972][ T4317] lock_acquire+0x19e/0x400 [ 89.938117][ T4317] __mutex_lock_common+0x1e5/0x2400 [ 89.943894][ T4317] mutex_lock_nested+0x17/0x20 [ 89.949326][ T4317] virtual_nci_close+0x13/0x40 [ 89.954620][ T4317] nci_close_device+0x383/0x600 [ 89.960196][ T4317] nci_unregister_device+0x5e/0x250 [ 89.966449][ T4317] virtual_ncidev_close+0x55/0x90 [ 89.972084][ T4317] __fput+0x212/0x8c0 [ 89.976584][ T4317] task_work_run+0x125/0x1a0 [ 89.981698][ T4317] exit_to_user_mode_loop+0x10f/0x130 [ 89.987600][ T4317] exit_to_user_mode_prepare+0xee/0x180 [ 89.993687][ T4317] syscall_exit_to_user_mode+0x16/0x40 [ 89.999687][ T4317] do_syscall_64+0x58/0xa0 [ 90.004643][ T4317] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 90.011180][ T4317] [ 90.011180][ T4317] other info that might help us debug this: [ 90.011180][ T4317] [ 90.021558][ T4317] Chain exists of: [ 90.021558][ T4317] nci_mutex --> &genl_data->genl_data_mutex --> &ndev->req_lock [ 90.021558][ T4317] [ 90.035121][ T4317] Possible unsafe locking scenario: [ 90.035121][ T4317] [ 90.042575][ T4317] CPU0 CPU1 [ 90.048104][ T4317] ---- ---- [ 90.053751][ T4317] lock(&ndev->req_lock); [ 90.058248][ T4317] lock(&genl_data->genl_data_mutex); [ 90.066270][ T4317] lock(&ndev->req_lock); [ 90.073208][ T4317] lock(nci_mutex); [ 90.077109][ T4317] [ 90.077109][ T4317] *** DEADLOCK *** [ 90.077109][ T4317] [ 90.085288][ T4317] 1 lock held by syz.0.17/4317: [ 90.090139][ T4317] #0: ffff88807bf73350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_close_device+0x102/0x600 [ 90.100219][ T4317] [ 90.100219][ T4317] stack backtrace: [ 90.106133][ T4317] CPU: 1 PID: 4317 Comm: syz.0.17 Not tainted syzkaller #0 [ 90.113431][ T4317] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 90.123900][ T4317] Call Trace: [ 90.127222][ T4317] [ 90.130188][ T4317] dump_stack_lvl+0x188/0x250 [ 90.134882][ T4317] ? load_image+0x410/0x410 [ 90.139402][ T4317] ? show_regs_print_info+0x20/0x20 [ 90.144641][ T4317] ? print_circular_bug+0x12b/0x1a0 [ 90.149860][ T4317] check_noncircular+0x296/0x330 [ 90.154855][ T4317] ? __lock_acquire+0x7b50/0x7b50 [ 90.160062][ T4317] ? add_chain_block+0x9b0/0x9b0 [ 90.165015][ T4317] ? lockdep_lock+0xf1/0x1f0 [ 90.169663][ T4317] ? mark_lock+0x94/0x320 [ 90.174016][ T4317] ? mark_lock+0x94/0x320 [ 90.178525][ T4317] ? _find_first_zero_bit+0xd1/0xf0 [ 90.183952][ T4317] __lock_acquire+0x2c66/0x7b50 [ 90.188936][ T4317] ? verify_lock_unused+0x140/0x140 [ 90.194364][ T4317] ? __schedule+0x11cb/0x4350 [ 90.199065][ T4317] ? vprintk_emit+0xc0/0x150 [ 90.204166][ T4317] ? read_lock_is_recursive+0x10/0x10 [ 90.209613][ T4317] lock_acquire+0x19e/0x400 [ 90.214333][ T4317] ? virtual_nci_close+0x13/0x40 [ 90.219291][ T4317] ? __might_sleep+0xf0/0xf0 [ 90.223891][ T4317] ? read_lock_is_recursive+0x10/0x10 [ 90.229271][ T4317] ? preempt_schedule_common+0xa5/0xd0 [ 90.234745][ T4317] ? preempt_schedule+0xbc/0xd0 [ 90.239723][ T4317] __mutex_lock_common+0x1e5/0x2400 [ 90.245093][ T4317] ? virtual_nci_close+0x13/0x40 [ 90.250325][ T4317] ? __irq_work_queue_local+0x12c/0x190 [ 90.256156][ T4317] ? irq_work_queue+0xb8/0x140 [ 90.260956][ T4317] ? __wake_up_klogd+0xd9/0x100 [ 90.265987][ T4317] ? virtual_nci_close+0x13/0x40 [ 90.271153][ T4317] ? mutex_lock_io_nested+0x60/0x60 [ 90.276383][ T4317] ? load_image+0x410/0x410 [ 90.280895][ T4317] ? _raw_spin_unlock_irq+0x1f/0x40 [ 90.286122][ T4317] mutex_lock_nested+0x17/0x20 [ 90.291132][ T4317] virtual_nci_close+0x13/0x40 [ 90.295937][ T4317] nci_close_device+0x383/0x600 [ 90.301012][ T4317] ? kfree+0xef/0x2a0 [ 90.305041][ T4317] ? nci_unregister_device+0x250/0x250 [ 90.310864][ T4317] ? kobject_put+0x41d/0x450 [ 90.315474][ T4317] nci_unregister_device+0x5e/0x250 [ 90.320696][ T4317] ? virtual_ncidev_open+0xc0/0xc0 [ 90.325919][ T4317] virtual_ncidev_close+0x55/0x90 [ 90.331151][ T4317] __fput+0x212/0x8c0 [ 90.335154][ T4317] task_work_run+0x125/0x1a0 [ 90.338924][ T4219] Bluetooth: hci0: command 0x0419 tx timeout [ 90.339762][ T4317] exit_to_user_mode_loop+0x10f/0x130 [ 90.351388][ T4317] exit_to_user_mode_prepare+0xee/0x180 [ 90.357107][ T4317] syscall_exit_to_user_mode+0x16/0x40 [ 90.362661][ T4317] do_syscall_64+0x58/0xa0 [ 90.367112][ T4317] ? clear_bhb_loop+0x30/0x80 [ 90.371844][ T4317] ? clear_bhb_loop+0x30/0x80 [ 90.376562][ T4317] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 90.382501][ T4317] RIP: 0033:0x7f74104470d9 [ 90.386979][ T4317] 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 [ 90.406707][ T4317] RSP: 002b:00007ffcb931a7d8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 90.415138][ T4317] RAX: 0000000000000000 RBX: 00007f74106d0da0 RCX: 00007f74104470d9 [ 90.423295][ T4317] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 90.431488][ T4317] RBP: 00007f74106d0da0 R08: 0000000000000006 R09: 0000000000000000 [ 90.439473][ T4317] R10: 00007f74106d0cb0 R11: 0000000000000246 R12: 0000000000015558 [ 90.447707][ T4317] R13: 00007f74106cefac R14: 00000000000152de R15: 00007f74106cefa0 [ 90.455697][ T4317] 2026/08/09 02:28:46 executed programs: 3 [ 93.491282][ T4328] nci: __nci_request: wait_for_completion_interruptible_timeout failed -512 [ 93.502424][ T4323] nci: __nci_request: wait_for_completion_interruptible_timeout failed -512 [ 96.524046][ T4330] nci: __nci_request: wait_for_completion_interruptible_timeout failed -512 2026/08/09 02:28:52 executed programs: 5 [ 99.554791][ T4341] nci: __nci_request: wait_for_completion_interruptible_timeout failed -512 [ 99.566723][ T4336] nci: __nci_request: wait_for_completion_interruptible_timeout failed -512