Warning: Permanently added '10.128.0.10' (ED25519) to the list of known hosts. 2025/10/02 11:33:44 parsed 1 programs syzkaller login: [ 69.192578][ T4191] cgroup: Unknown subsys name 'net' [ 69.360713][ T4191] cgroup: Unknown subsys name 'rlimit' [ 70.921041][ T4191] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 71.356979][ T1423] ieee802154 phy0 wpan0: encryption failed: -22 [ 71.363574][ T1423] ieee802154 phy1 wpan1: encryption failed: -22 [ 72.864557][ T4215] chnl_net:caif_netlink_parms(): no params data found [ 72.920324][ T4215] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.928229][ T4215] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.937047][ T4215] device bridge_slave_0 entered promiscuous mode [ 72.946321][ T4215] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.954736][ T4215] bridge0: port 2(bridge_slave_1) entered disabled state [ 72.962618][ T4215] device bridge_slave_1 entered promiscuous mode [ 72.991633][ T4215] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 73.004755][ T4215] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 73.039949][ T4215] team0: Port device team_slave_0 added [ 73.049406][ T4215] team0: Port device team_slave_1 added [ 73.076115][ T4215] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 73.083111][ T4215] 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. [ 73.110631][ T4215] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 73.124169][ T4215] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 73.131334][ T4215] 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. [ 73.158802][ T4215] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 73.201928][ T4215] device hsr_slave_0 entered promiscuous mode [ 73.210469][ T4215] device hsr_slave_1 entered promiscuous mode [ 73.355032][ T4215] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 73.369336][ T4215] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 73.379803][ T4215] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 73.391071][ T4215] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 73.433453][ T4215] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.440692][ T4215] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.448925][ T4215] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.456150][ T4215] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.519793][ T4215] 8021q: adding VLAN 0 to HW filter on device bond0 [ 73.535431][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 73.548202][ T3098] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.557347][ T3098] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.566454][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 73.583177][ T4215] 8021q: adding VLAN 0 to HW filter on device team0 [ 73.595757][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 73.605813][ T3098] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.612908][ T3098] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.636922][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 73.648976][ T154] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.656116][ T154] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.667158][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 73.685849][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 73.697209][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 73.705976][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 73.721352][ T4215] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 73.733576][ T4215] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 73.742715][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 73.873959][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 73.881512][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 73.897567][ T4215] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 73.929352][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 73.940582][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 73.965794][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 73.974801][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 73.984342][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 73.992590][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 74.004947][ T4215] device veth0_vlan entered promiscuous mode [ 74.018771][ T4215] device veth1_vlan entered promiscuous mode [ 74.042406][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 74.050885][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 74.060777][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 74.070196][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 74.083225][ T4215] device veth0_macvtap entered promiscuous mode [ 74.095740][ T4215] device veth1_macvtap entered promiscuous mode [ 74.114446][ T4215] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 74.122192][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 74.130490][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 74.139316][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 74.148390][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 74.160179][ T4215] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 74.171622][ T4215] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.182290][ T4215] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.191196][ T4215] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.200934][ T4215] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.219593][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 74.229311][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 74.336087][ T4215] syz-executor (4215) used greatest stack depth: 20096 bytes left [ 74.462280][ T1279] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 75.589961][ T154] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 75.609073][ T154] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 75.619214][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 75.628490][ T3098] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 75.636949][ T3098] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 75.646480][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2025/10/02 11:33:54 executed programs: 0 [ 76.485710][ T4284] chnl_net:caif_netlink_parms(): no params data found [ 76.530330][ T4284] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.537583][ T4284] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.545951][ T4284] device bridge_slave_0 entered promiscuous mode [ 76.555174][ T4284] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.562411][ T4284] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.570595][ T4284] device bridge_slave_1 entered promiscuous mode [ 76.592530][ T4284] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 76.604124][ T4284] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 76.629142][ T4284] team0: Port device team_slave_0 added [ 76.637088][ T4284] team0: Port device team_slave_1 added [ 76.657362][ T4284] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 76.664507][ T4284] 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. [ 76.690756][ T4284] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 76.702803][ T4284] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 76.710353][ T4284] 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. [ 76.736924][ T4284] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 76.769084][ T4284] device hsr_slave_0 entered promiscuous mode [ 76.776088][ T4284] device hsr_slave_1 entered promiscuous mode [ 76.782929][ T4284] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 76.790859][ T4284] Cannot create hsr debugfs directory [ 77.070293][ T1279] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 78.394231][ T4233] Bluetooth: hci0: command 0x0409 tx timeout [ 79.329033][ T1279] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 79.392121][ T1279] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 80.201737][ T4284] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 80.211908][ T4284] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 80.221575][ T4284] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 80.233099][ T4284] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 80.297609][ T4284] 8021q: adding VLAN 0 to HW filter on device bond0 [ 80.319798][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 80.327865][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 80.338756][ T4284] 8021q: adding VLAN 0 to HW filter on device team0 [ 80.350270][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 80.359490][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 80.369394][ T9] bridge0: port 1(bridge_slave_0) entered blocking state [ 80.376524][ T9] bridge0: port 1(bridge_slave_0) entered forwarding state [ 80.384921][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 80.401771][ T1279] device hsr_slave_0 left promiscuous mode [ 80.408322][ T1279] device hsr_slave_1 left promiscuous mode [ 80.415116][ T1279] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 80.422589][ T1279] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 80.432229][ T1279] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 80.440173][ T1279] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 80.448457][ T1279] device bridge_slave_1 left promiscuous mode [ 80.455015][ T1279] bridge0: port 2(bridge_slave_1) entered disabled state [ 80.469003][ T1279] device bridge_slave_0 left promiscuous mode [ 80.476240][ T1279] bridge0: port 1(bridge_slave_0) entered disabled state [ 80.483801][ T21] Bluetooth: hci0: command 0x041b tx timeout [ 80.500851][ T1279] device veth1_macvtap left promiscuous mode [ 80.507784][ T1279] device veth0_macvtap left promiscuous mode [ 80.514736][ T1279] device veth1_vlan left promiscuous mode [ 80.520701][ T1279] device veth0_vlan left promiscuous mode [ 80.678702][ T1279] team0 (unregistering): Port device team_slave_1 removed [ 80.696295][ T1279] team0 (unregistering): Port device team_slave_0 removed [ 80.709258][ T1279] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 80.725205][ T1279] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 80.785951][ T1279] bond0 (unregistering): Released all slaves [ 80.862638][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 80.872747][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 80.882171][ T9] bridge0: port 2(bridge_slave_1) entered blocking state [ 80.889355][ T9] bridge0: port 2(bridge_slave_1) entered forwarding state [ 80.906404][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 80.935415][ T4284] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 80.946740][ T4284] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 80.959870][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 80.968706][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 80.977951][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 80.986831][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 80.996746][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 81.005852][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 81.014636][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 81.023096][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 81.032104][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 81.044084][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 81.052153][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 81.161829][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 81.169732][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 81.181748][ T4284] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 81.214821][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 81.223772][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 81.235780][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 81.244168][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 81.252616][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 81.261495][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 81.271413][ T4284] device veth0_vlan entered promiscuous mode [ 81.287233][ T4284] device veth1_vlan entered promiscuous mode [ 81.309657][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 81.318527][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 81.327333][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 81.336960][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 81.348362][ T4284] device veth0_macvtap entered promiscuous mode [ 81.368662][ T4284] device veth1_macvtap entered promiscuous mode [ 81.387067][ T4284] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 81.397112][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 81.406655][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 81.420356][ T4284] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 81.428871][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 81.438298][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 81.451832][ T4284] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 81.461218][ T4284] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 81.471724][ T4284] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 81.481052][ T4284] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 81.561293][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 81.573643][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 81.584996][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 81.627301][ T154] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 81.643481][ T154] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 81.652672][ T3098] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 81.968370][ T4338] [ 81.970941][ T4338] ====================================================== [ 81.977978][ T4338] WARNING: possible circular locking dependency detected [ 81.985023][ T4338] syzkaller #0 Not tainted [ 81.989448][ T4338] ------------------------------------------------------ [ 81.996474][ T4338] syz.0.17/4338 is trying to acquire lock: [ 82.002544][ T4338] ffff888025784c28 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xc1/0x1b0 [ 82.013716][ T4338] [ 82.013716][ T4338] but task is already holding lock: [ 82.021100][ T4338] ffffffff8d4c0468 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x19e/0x560 [ 82.030879][ T4338] [ 82.030879][ T4338] which lock already depends on the new lock. [ 82.030879][ T4338] [ 82.041422][ T4338] [ 82.041422][ T4338] the existing dependency chain (in reverse order) is: [ 82.050451][ T4338] [ 82.050451][ T4338] -> #4 (rfkill_global_mutex){+.+.}-{3:3}: [ 82.058471][ T4338] __mutex_lock_common+0x1eb/0x2390 [ 82.064230][ T4338] mutex_lock_nested+0x17/0x20 [ 82.069636][ T4338] rfkill_register+0x33/0x8a0 [ 82.074851][ T4338] hci_register_dev+0x452/0x970 [ 82.080244][ T4338] vhci_create_device+0x32c/0x5c0 [ 82.085817][ T4338] vhci_write+0x391/0x450 [ 82.090683][ T4338] vfs_write+0x712/0xd00 [ 82.095464][ T4338] ksys_write+0x14d/0x250 [ 82.100330][ T4338] do_syscall_64+0x4c/0xa0 [ 82.105275][ T4338] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 82.111795][ T4338] [ 82.111795][ T4338] -> #3 (&data->open_mutex){+.+.}-{3:3}: [ 82.119628][ T4338] __mutex_lock_common+0x1eb/0x2390 [ 82.125364][ T4338] mutex_lock_nested+0x17/0x20 [ 82.130672][ T4338] vhci_send_frame+0x88/0x100 [ 82.135883][ T4338] hci_send_frame+0x1a9/0x2e0 [ 82.141103][ T4338] hci_tx_work+0x9f9/0x1710 [ 82.146138][ T4338] process_one_work+0x863/0x1000 [ 82.151703][ T4338] worker_thread+0xaa8/0x12a0 [ 82.156912][ T4338] kthread+0x436/0x520 [ 82.161556][ T4338] ret_from_fork+0x1f/0x30 [ 82.166509][ T4338] [ 82.166509][ T4338] -> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}: [ 82.175740][ T4338] __flush_work+0xdd/0x1b0 [ 82.180744][ T4338] hci_dev_do_close+0x1e7/0x1030 [ 82.186321][ T4338] hci_unregister_dev+0x2d7/0x580 [ 82.191890][ T4338] vhci_release+0x73/0xc0 [ 82.196923][ T4338] __fput+0x234/0x930 [ 82.201528][ T4338] task_work_run+0x125/0x1a0 [ 82.206659][ T4338] do_exit+0x61e/0x20a0 [ 82.211359][ T4338] do_group_exit+0x12e/0x300 [ 82.216488][ T4338] get_signal+0x6ca/0x12c0 [ 82.221436][ T4338] arch_do_signal_or_restart+0xc1/0x1300 [ 82.227606][ T4338] exit_to_user_mode_loop+0x9e/0x130 [ 82.233443][ T4338] exit_to_user_mode_prepare+0xee/0x180 [ 82.239581][ T4338] syscall_exit_to_user_mode+0x16/0x40 [ 82.245752][ T4338] do_syscall_64+0x58/0xa0 [ 82.250711][ T4338] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 82.257150][ T4338] [ 82.257150][ T4338] -> #1 (&hdev->req_lock){+.+.}-{3:3}: [ 82.264816][ T4338] __mutex_lock_common+0x1eb/0x2390 [ 82.270650][ T4338] mutex_lock_nested+0x17/0x20 [ 82.275959][ T4338] bg_scan_update+0x44/0x3b0 [ 82.281097][ T4338] process_one_work+0x863/0x1000 [ 82.286573][ T4338] worker_thread+0xaa8/0x12a0 [ 82.291985][ T4338] kthread+0x436/0x520 [ 82.296816][ T4338] ret_from_fork+0x1f/0x30 [ 82.301774][ T4338] [ 82.301774][ T4338] -> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}: [ 82.311596][ T4338] __lock_acquire+0x2c33/0x7c60 [ 82.317068][ T4338] lock_acquire+0x197/0x3f0 [ 82.322222][ T4338] __flush_work+0xdd/0x1b0 [ 82.327288][ T4338] __cancel_work_timer+0x3ac/0x520 [ 82.333107][ T4338] hci_request_cancel_all+0xcc/0x300 [ 82.338941][ T4338] hci_dev_do_close+0x4e/0x1030 [ 82.344333][ T4338] hci_rfkill_set_block+0x10a/0x190 [ 82.350238][ T4338] rfkill_set_block+0x1c6/0x420 [ 82.355622][ T4338] rfkill_fop_write+0x458/0x560 [ 82.361091][ T4338] vfs_write+0x300/0xd00 [ 82.365860][ T4338] ksys_write+0x14d/0x250 [ 82.370799][ T4338] do_syscall_64+0x4c/0xa0 [ 82.375921][ T4338] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 82.382343][ T4338] [ 82.382343][ T4338] other info that might help us debug this: [ 82.382343][ T4338] [ 82.392658][ T4338] Chain exists of: [ 82.392658][ T4338] (work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex [ 82.392658][ T4338] [ 82.408388][ T4338] Possible unsafe locking scenario: [ 82.408388][ T4338] [ 82.415836][ T4338] CPU0 CPU1 [ 82.421246][ T4338] ---- ---- [ 82.426875][ T4338] lock(rfkill_global_mutex); [ 82.431644][ T4338] lock(&data->open_mutex); [ 82.438862][ T4338] lock(rfkill_global_mutex); [ 82.446246][ T4338] lock((work_completion)(&hdev->bg_scan_update)); [ 82.452834][ T4338] [ 82.452834][ T4338] *** DEADLOCK *** [ 82.452834][ T4338] [ 82.460974][ T4338] 1 lock held by syz.0.17/4338: [ 82.465829][ T4338] #0: ffffffff8d4c0468 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x19e/0x560 [ 82.476020][ T4338] [ 82.476020][ T4338] stack backtrace: [ 82.481930][ T4338] CPU: 0 PID: 4338 Comm: syz.0.17 Not tainted syzkaller #0 [ 82.489260][ T4338] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 [ 82.499341][ T4338] Call Trace: [ 82.502627][ T4338] [ 82.505588][ T4338] dump_stack_lvl+0x168/0x230 [ 82.510278][ T4338] ? load_image+0x3b0/0x3b0 [ 82.514791][ T4338] ? show_regs_print_info+0x20/0x20 [ 82.520299][ T4338] ? print_circular_bug+0x12b/0x1a0 [ 82.525630][ T4338] check_noncircular+0x274/0x310 [ 82.530754][ T4338] ? add_chain_block+0x940/0x940 [ 82.535705][ T4338] ? lockdep_lock+0x141/0x1e0 [ 82.540480][ T4338] ? __lock_acquire+0x12d9/0x7c60 [ 82.545511][ T4338] ? lockdep_lock+0x1e0/0x1e0 [ 82.550194][ T4338] ? mark_lock+0x94/0x320 [ 82.554550][ T4338] __lock_acquire+0x2c33/0x7c60 [ 82.559413][ T4338] ? verify_lock_unused+0x140/0x140 [ 82.564626][ T4338] ? verify_lock_unused+0x140/0x140 [ 82.569872][ T4338] lock_acquire+0x197/0x3f0 [ 82.574406][ T4338] ? __flush_work+0xc1/0x1b0 [ 82.579005][ T4338] ? __lock_acquire+0x7c60/0x7c60 [ 82.584045][ T4338] ? read_lock_is_recursive+0x10/0x10 [ 82.589436][ T4338] ? start_flush_work+0x776/0x820 [ 82.594469][ T4338] ? _raw_spin_unlock_irqrestore+0xaa/0x100 [ 82.600374][ T4338] ? _raw_spin_unlock+0x40/0x40 [ 82.605237][ T4338] __flush_work+0xdd/0x1b0 [ 82.609658][ T4338] ? __flush_work+0xc1/0x1b0 [ 82.614257][ T4338] ? flush_work+0x20/0x20 [ 82.618589][ T4338] ? try_to_grab_pending+0xf3/0x7e0 [ 82.623900][ T4338] ? lockdep_hardirqs_off+0x70/0x100 [ 82.629284][ T4338] ? mark_lock+0x94/0x320 [ 82.633622][ T4338] ? lockdep_hardirqs_on_prepare+0x3fc/0x760 [ 82.639612][ T4338] ? lock_chain_count+0x20/0x20 [ 82.644593][ T4338] ? mark_lock+0x94/0x320 [ 82.648941][ T4338] ? __cancel_work_timer+0x331/0x520 [ 82.654235][ T4338] __cancel_work_timer+0x3ac/0x520 [ 82.659355][ T4338] ? cancel_work_sync+0x20/0x20 [ 82.664227][ T4338] ? __cancel_work+0x1f4/0x2d0 [ 82.669168][ T4338] ? lockdep_hardirqs_on+0x94/0x140 [ 82.674381][ T4338] ? __cancel_work+0x26f/0x2d0 [ 82.679149][ T4338] ? cancel_work+0x20/0x20 [ 82.683566][ T4338] ? lock_chain_count+0x20/0x20 [ 82.688435][ T4338] hci_request_cancel_all+0xcc/0x300 [ 82.693729][ T4338] hci_dev_do_close+0x4e/0x1030 [ 82.698587][ T4338] ? _raw_spin_unlock_irqrestore+0xaa/0x100 [ 82.704517][ T4338] ? _raw_spin_unlock+0x40/0x40 [ 82.709375][ T4338] hci_rfkill_set_block+0x10a/0x190 [ 82.714709][ T4338] ? rcu_lock_release+0x20/0x20 [ 82.719670][ T4338] rfkill_set_block+0x1c6/0x420 [ 82.724545][ T4338] rfkill_fop_write+0x458/0x560 [ 82.729412][ T4338] ? verify_lock_unused+0x140/0x140 [ 82.734615][ T4338] ? rfkill_fop_read+0x4b0/0x4b0 [ 82.739661][ T4338] ? common_file_perm+0xc0/0x1c0 [ 82.744605][ T4338] ? fsnotify_perm+0x5d/0x560 [ 82.749305][ T4338] ? security_file_permission+0x75/0xa0 [ 82.754859][ T4338] ? rfkill_fop_read+0x4b0/0x4b0 [ 82.759809][ T4338] vfs_write+0x300/0xd00 [ 82.764115][ T4338] ? file_end_write+0x250/0x250 [ 82.768974][ T4338] ? __context_tracking_exit+0x4c/0x80 [ 82.774444][ T4338] ? __lock_acquire+0x7c60/0x7c60 [ 82.779497][ T4338] ? __fdget_pos+0x1e2/0x370 [ 82.784137][ T4338] ksys_write+0x14d/0x250 [ 82.788666][ T4338] ? __ia32_sys_read+0x80/0x80 [ 82.793450][ T4338] ? lockdep_hardirqs_on+0x94/0x140 [ 82.798746][ T4338] do_syscall_64+0x4c/0xa0 [ 82.803167][ T4338] ? clear_bhb_loop+0x30/0x80 [ 82.807962][ T4338] ? clear_bhb_loop+0x30/0x80 [ 82.812660][ T4338] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 82.818751][ T4338] RIP: 0033:0x7fac040ffec9 [ 82.823176][ T4338] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 [ 82.843012][ T4338] RSP: 002b:00007fff85b4f548 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 82.851528][ T4338] RAX: ffffffffffffffda RBX: 00007fac04356fa0 RCX: 00007fac040ffec9 [ 82.859778][ T4338] RDX: 0000000000000008 RSI: 0000200000000080 RDI: 0000000000000003 [ 82.867757][ T4338] RBP: 00007fac04182f91 R08: 0000000000000000 R09: 0000000000000000 [ 82.875818][ T4338] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 82.883803][ T4338] R13: 00007fac04356fa0 R14: 00007fac04356fa0 R15: 0000000000000003 [ 82.891787][ T4338] [ 82.897037][ T3161] Bluetooth: hci0: command 0x040f tx timeout