Warning: Permanently added '10.128.0.119' (ED25519) to the list of known hosts. 2026/04/29 16:58:35 parsed 1 programs syzkaller login: [ 79.964142][ T4194] cgroup: Unknown subsys name 'net' [ 80.088940][ T4194] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 81.592199][ T4194] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 83.363353][ T4212] chnl_net:caif_netlink_parms(): no params data found [ 83.414486][ T4212] bridge0: port 1(bridge_slave_0) entered blocking state [ 83.422256][ T4212] bridge0: port 1(bridge_slave_0) entered disabled state [ 83.430433][ T4212] device bridge_slave_0 entered promiscuous mode [ 83.442886][ T4212] bridge0: port 2(bridge_slave_1) entered blocking state [ 83.450007][ T4212] bridge0: port 2(bridge_slave_1) entered disabled state [ 83.458050][ T4212] device bridge_slave_1 entered promiscuous mode [ 83.479138][ T4212] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 83.493063][ T4212] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 83.516470][ T4212] team0: Port device team_slave_0 added [ 83.524276][ T4212] team0: Port device team_slave_1 added [ 83.542244][ T4212] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 83.549248][ T4212] 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. [ 83.575195][ T4212] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 83.588327][ T4212] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 83.595832][ T4212] 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. [ 83.622266][ T4212] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 83.657538][ T4212] device hsr_slave_0 entered promiscuous mode [ 83.664503][ T4212] device hsr_slave_1 entered promiscuous mode [ 83.807603][ T4212] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 83.820045][ T4212] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 83.831126][ T4212] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 83.842156][ T4212] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 83.876217][ T4212] bridge0: port 2(bridge_slave_1) entered blocking state [ 83.883578][ T4212] bridge0: port 2(bridge_slave_1) entered forwarding state [ 83.891837][ T4212] bridge0: port 1(bridge_slave_0) entered blocking state [ 83.899077][ T4212] bridge0: port 1(bridge_slave_0) entered forwarding state [ 83.959160][ T4212] 8021q: adding VLAN 0 to HW filter on device bond0 [ 83.975828][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 83.987959][ T9] bridge0: port 1(bridge_slave_0) entered disabled state [ 83.997351][ T9] bridge0: port 2(bridge_slave_1) entered disabled state [ 84.006498][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 84.023534][ T4212] 8021q: adding VLAN 0 to HW filter on device team0 [ 84.036847][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 84.047735][ T9] bridge0: port 1(bridge_slave_0) entered blocking state [ 84.054891][ T9] bridge0: port 1(bridge_slave_0) entered forwarding state [ 84.075485][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 84.084611][ T9] bridge0: port 2(bridge_slave_1) entered blocking state [ 84.091757][ T9] bridge0: port 2(bridge_slave_1) entered forwarding state [ 84.114915][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 84.125725][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 84.146850][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 84.157293][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 84.166683][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 84.179266][ T4212] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 84.315314][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 84.323557][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 84.337715][ T4212] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 84.364002][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 84.374952][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 84.397680][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 84.408741][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 84.421037][ T4212] device veth0_vlan entered promiscuous mode [ 84.429934][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 84.438892][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 84.454974][ T4212] device veth1_vlan entered promiscuous mode [ 84.490885][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 84.500255][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 84.509885][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 84.519328][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 84.530778][ T4212] device veth0_macvtap entered promiscuous mode [ 84.544870][ T4212] device veth1_macvtap entered promiscuous mode [ 84.566780][ T4212] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 84.574467][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 84.583678][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 84.592536][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 84.601240][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 84.613774][ T4212] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 84.622755][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 84.634124][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 84.646883][ T4212] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 84.657903][ T4212] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 84.667206][ T4212] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 84.676808][ T4212] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 84.789698][ T4212] syz-executor (4212) used greatest stack depth: 20312 bytes left [ 85.300971][ T144] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 85.466741][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 85.475014][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 85.489868][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 85.515970][ T155] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 85.523959][ T155] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 85.532249][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 86.703884][ T1111] cfg80211: failed to load regulatory.db [ 87.448674][ T144] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 89.457215][ T144] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 89.510436][ T144] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 90.780732][ T144] device hsr_slave_0 left promiscuous mode [ 90.789809][ T144] device hsr_slave_1 left promiscuous mode [ 90.798064][ T144] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 90.807147][ T144] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 90.816755][ T144] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 90.825675][ T144] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 90.834034][ T144] device bridge_slave_1 left promiscuous mode [ 90.841163][ T144] bridge0: port 2(bridge_slave_1) entered disabled state [ 90.861154][ T144] device bridge_slave_0 left promiscuous mode [ 90.867688][ T144] bridge0: port 1(bridge_slave_0) entered disabled state [ 90.895358][ T144] device veth1_macvtap left promiscuous mode [ 90.901945][ T144] device veth0_macvtap left promiscuous mode [ 90.908072][ T144] device veth1_vlan left promiscuous mode [ 90.915866][ T144] device veth0_vlan left promiscuous mode [ 91.142670][ T144] team0 (unregistering): Port device team_slave_1 removed [ 91.156613][ T144] team0 (unregistering): Port device team_slave_0 removed [ 91.170134][ T144] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 91.185171][ T144] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 91.242098][ T144] bond0 (unregistering): Released all slaves 2026/04/29 16:58:49 executed programs: 0 [ 92.619371][ T4350] chnl_net:caif_netlink_parms(): no params data found [ 92.743294][ T4350] bridge0: port 1(bridge_slave_0) entered blocking state [ 92.762864][ T4350] bridge0: port 1(bridge_slave_0) entered disabled state [ 92.771107][ T4350] device bridge_slave_0 entered promiscuous mode [ 92.794127][ T4350] bridge0: port 2(bridge_slave_1) entered blocking state [ 92.811650][ T4350] bridge0: port 2(bridge_slave_1) entered disabled state [ 92.820321][ T4350] device bridge_slave_1 entered promiscuous mode [ 92.882362][ T4350] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 92.904319][ T4350] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 92.951002][ T4350] team0: Port device team_slave_0 added [ 92.974215][ T4350] team0: Port device team_slave_1 added [ 93.005122][ T4350] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 93.012511][ T4350] 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. [ 93.040761][ T4350] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 93.054054][ T4350] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 93.061031][ T4350] 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. [ 93.101780][ T4350] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 93.163459][ T4350] device hsr_slave_0 entered promiscuous mode [ 93.170512][ T4350] device hsr_slave_1 entered promiscuous mode [ 94.023430][ T4350] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 94.034579][ T4350] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 94.073534][ T4350] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 94.097368][ T4350] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 94.174204][ T4350] 8021q: adding VLAN 0 to HW filter on device bond0 [ 94.188857][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 94.200565][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 94.212200][ T4350] 8021q: adding VLAN 0 to HW filter on device team0 [ 94.227989][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 94.240712][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 94.250463][ T154] bridge0: port 1(bridge_slave_0) entered blocking state [ 94.257624][ T154] bridge0: port 1(bridge_slave_0) entered forwarding state [ 94.267834][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 94.276969][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 94.287014][ T154] bridge0: port 2(bridge_slave_1) entered blocking state [ 94.294168][ T154] bridge0: port 2(bridge_slave_1) entered forwarding state [ 94.302333][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 94.318430][ T155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 94.331375][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 94.348259][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 94.363301][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 94.372622][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 94.384447][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 94.403085][ T4350] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 94.413770][ T4350] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 94.427626][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 94.438183][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 94.447792][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 94.456858][ T4271] Bluetooth: hci0: command 0x0409 tx timeout [ 94.466263][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 94.475593][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 94.484756][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 94.652495][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 94.660266][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 94.713173][ T4350] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 94.736305][ T4280] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 94.747436][ T4280] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 94.768935][ T4280] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 94.781427][ T4280] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 94.832872][ T4280] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 94.841026][ T4280] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 94.852735][ T4350] device veth0_vlan entered promiscuous mode [ 94.866993][ T4350] device veth1_vlan entered promiscuous mode [ 94.893600][ T4280] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 94.902773][ T4280] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 94.911079][ T4280] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 94.923968][ T4280] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 94.938626][ T4350] device veth0_macvtap entered promiscuous mode [ 94.983603][ T4350] device veth1_macvtap entered promiscuous mode [ 95.006771][ T4350] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 95.015579][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 95.026365][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 95.036221][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 95.045764][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 95.095417][ T4350] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 95.107803][ T4350] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 95.117304][ T4350] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 95.126993][ T4350] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 95.136068][ T4350] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 95.147586][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 95.158581][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 95.312261][ T154] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 95.320242][ T154] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 95.339294][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 95.352809][ T154] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 95.360682][ T154] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 95.399579][ T3061] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 95.477822][ T4462] [ 95.480226][ T4462] ====================================================== [ 95.487270][ T4462] WARNING: possible circular locking dependency detected [ 95.494324][ T4462] syzkaller #0 Not tainted [ 95.498768][ T4462] ------------------------------------------------------ [ 95.505937][ T4462] syz.0.17/4462 is trying to acquire lock: [ 95.511765][ T4462] ffff8880271a0c28 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xfa/0x210 [ 95.522870][ T4462] [ 95.522870][ T4462] but task is already holding lock: [ 95.530258][ T4462] ffffffff8d6c5de8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x18b/0x560 [ 95.539958][ T4462] [ 95.539958][ T4462] which lock already depends on the new lock. [ 95.539958][ T4462] [ 95.550383][ T4462] [ 95.550383][ T4462] the existing dependency chain (in reverse order) is: [ 95.559421][ T4462] [ 95.559421][ T4462] -> #4 (rfkill_global_mutex){+.+.}-{3:3}: [ 95.567537][ T4462] __mutex_lock_common+0x1e3/0x2400 [ 95.573302][ T4462] mutex_lock_nested+0x17/0x20 [ 95.578632][ T4462] rfkill_register+0x33/0x980 [ 95.583911][ T4462] hci_register_dev+0x452/0x970 [ 95.589322][ T4462] vhci_create_device+0x32c/0x5c0 [ 95.594994][ T4462] vhci_write+0x391/0x450 [ 95.599889][ T4462] vfs_write+0x745/0xd60 [ 95.604693][ T4462] ksys_write+0x152/0x260 [ 95.609576][ T4462] do_syscall_64+0x4c/0xa0 [ 95.614551][ T4462] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 95.621020][ T4462] [ 95.621020][ T4462] -> #3 (&data->open_mutex){+.+.}-{3:3}: [ 95.628896][ T4462] __mutex_lock_common+0x1e3/0x2400 [ 95.634667][ T4462] mutex_lock_nested+0x17/0x20 [ 95.640004][ T4462] vhci_send_frame+0x88/0x100 [ 95.645282][ T4462] hci_send_frame+0x1a9/0x2e0 [ 95.650525][ T4462] hci_tx_work+0x9f9/0x1710 [ 95.655591][ T4462] process_one_work+0x85f/0x1010 [ 95.661093][ T4462] worker_thread+0xaa6/0x1290 [ 95.666328][ T4462] kthread+0x436/0x520 [ 95.670948][ T4462] ret_from_fork+0x1f/0x30 [ 95.675917][ T4462] [ 95.675917][ T4462] -> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}: [ 95.685160][ T4462] __flush_work+0x116/0x210 [ 95.690221][ T4462] hci_dev_do_close+0x1e7/0x1030 [ 95.695711][ T4462] hci_unregister_dev+0x2d7/0x580 [ 95.701289][ T4462] vhci_release+0x73/0xc0 [ 95.706179][ T4462] __fput+0x234/0x930 [ 95.710739][ T4462] task_work_run+0x125/0x1a0 [ 95.715915][ T4462] do_exit+0x626/0x20c0 [ 95.720624][ T4462] do_group_exit+0x12e/0x300 [ 95.725777][ T4462] get_signal+0x6ca/0x12c0 [ 95.730757][ T4462] arch_do_signal_or_restart+0xe7/0x12c0 [ 95.736953][ T4462] exit_to_user_mode_loop+0x9e/0x130 [ 95.743008][ T4462] exit_to_user_mode_prepare+0xee/0x180 [ 95.749113][ T4462] syscall_exit_to_user_mode+0x16/0x40 [ 95.755129][ T4462] do_syscall_64+0x58/0xa0 [ 95.760116][ T4462] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 95.766592][ T4462] [ 95.766592][ T4462] -> #1 (&hdev->req_lock){+.+.}-{3:3}: [ 95.774293][ T4462] __mutex_lock_common+0x1e3/0x2400 [ 95.780053][ T4462] mutex_lock_nested+0x17/0x20 [ 95.785728][ T4462] bg_scan_update+0x44/0x3b0 [ 95.790892][ T4462] process_one_work+0x85f/0x1010 [ 95.796392][ T4462] worker_thread+0xaa6/0x1290 [ 95.801626][ T4462] kthread+0x436/0x520 [ 95.806271][ T4462] ret_from_fork+0x1f/0x30 [ 95.811431][ T4462] [ 95.811431][ T4462] -> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}: [ 95.821549][ T4462] __lock_acquire+0x2c42/0x7d10 [ 95.826964][ T4462] lock_acquire+0x19e/0x400 [ 95.832230][ T4462] __flush_work+0x116/0x210 [ 95.837302][ T4462] __cancel_work_timer+0x3f4/0x560 [ 95.843005][ T4462] hci_request_cancel_all+0xcc/0x300 [ 95.848861][ T4462] hci_dev_do_close+0x4e/0x1030 [ 95.854283][ T4462] hci_rfkill_set_block+0x10a/0x190 [ 95.860048][ T4462] rfkill_set_block+0x1c9/0x3d0 [ 95.865483][ T4462] rfkill_fop_write+0x2e7/0x560 [ 95.871061][ T4462] vfs_write+0x30b/0xd60 [ 95.875883][ T4462] ksys_write+0x152/0x260 [ 95.880777][ T4462] do_syscall_64+0x4c/0xa0 [ 95.885767][ T4462] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 95.892224][ T4462] [ 95.892224][ T4462] other info that might help us debug this: [ 95.892224][ T4462] [ 95.902484][ T4462] Chain exists of: [ 95.902484][ T4462] (work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex [ 95.902484][ T4462] [ 95.918255][ T4462] Possible unsafe locking scenario: [ 95.918255][ T4462] [ 95.925737][ T4462] CPU0 CPU1 [ 95.931134][ T4462] ---- ---- [ 95.936529][ T4462] lock(rfkill_global_mutex); [ 95.941338][ T4462] lock(&data->open_mutex); [ 95.948483][ T4462] lock(rfkill_global_mutex); [ 95.955804][ T4462] lock((work_completion)(&hdev->bg_scan_update)); [ 95.962428][ T4462] [ 95.962428][ T4462] *** DEADLOCK *** [ 95.962428][ T4462] [ 95.970705][ T4462] 1 lock held by syz.0.17/4462: [ 95.975586][ T4462] #0: ffffffff8d6c5de8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x18b/0x560 [ 95.985741][ T4462] [ 95.985741][ T4462] stack backtrace: [ 95.991675][ T4462] CPU: 0 PID: 4462 Comm: syz.0.17 Not tainted syzkaller #0 [ 95.998940][ T4462] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 [ 96.009098][ T4462] Call Trace: [ 96.012413][ T4462] [ 96.015375][ T4462] dump_stack_lvl+0x188/0x250 [ 96.020089][ T4462] ? load_image+0x400/0x400 [ 96.024630][ T4462] ? show_regs_print_info+0x20/0x20 [ 96.029989][ T4462] ? print_circular_bug+0x12b/0x1a0 [ 96.035238][ T4462] check_noncircular+0x296/0x330 [ 96.040215][ T4462] ? look_up_lock_class+0x71/0x110 [ 96.045407][ T4462] ? add_chain_block+0x940/0x940 [ 96.050492][ T4462] ? lockdep_lock+0xf1/0x1f0 [ 96.055135][ T4462] ? __lock_acquire+0x12e8/0x7d10 [ 96.060360][ T4462] ? mark_lock+0x94/0x320 [ 96.064759][ T4462] __lock_acquire+0x2c42/0x7d10 [ 96.069628][ T4462] ? verify_lock_unused+0x140/0x140 [ 96.074857][ T4462] ? mark_lock+0x94/0x320 [ 96.079198][ T4462] ? verify_lock_unused+0x140/0x140 [ 96.084653][ T4462] lock_acquire+0x19e/0x400 [ 96.089190][ T4462] ? __flush_work+0xfa/0x210 [ 96.093994][ T4462] ? __lock_acquire+0x7d10/0x7d10 [ 96.099079][ T4462] ? read_lock_is_recursive+0x10/0x10 [ 96.104473][ T4462] ? start_flush_work+0x776/0x820 [ 96.109515][ T4462] __flush_work+0x116/0x210 [ 96.114030][ T4462] ? __flush_work+0xfa/0x210 [ 96.118637][ T4462] ? flush_work+0x20/0x20 [ 96.123067][ T4462] ? try_to_grab_pending+0xfa/0x7f0 [ 96.128286][ T4462] ? mark_lock+0x94/0x320 [ 96.132630][ T4462] ? lockdep_hardirqs_on_prepare+0x409/0x770 [ 96.138646][ T4462] ? lock_chain_count+0x20/0x20 [ 96.143518][ T4462] ? mark_lock+0x94/0x320 [ 96.147856][ T4462] ? __cancel_work_timer+0x36a/0x560 [ 96.153168][ T4462] __cancel_work_timer+0x3f4/0x560 [ 96.158398][ T4462] ? cancel_work_sync+0x20/0x20 [ 96.163264][ T4462] ? __cancel_work+0x1f9/0x2e0 [ 96.168872][ T4462] ? lockdep_hardirqs_on+0x94/0x140 [ 96.174124][ T4462] ? __cancel_work+0x27b/0x2e0 [ 96.178901][ T4462] ? cancel_work+0x20/0x20 [ 96.183465][ T4462] ? lock_chain_count+0x20/0x20 [ 96.188341][ T4462] hci_request_cancel_all+0xcc/0x300 [ 96.193656][ T4462] hci_dev_do_close+0x4e/0x1030 [ 96.198953][ T4462] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 96.204854][ T4462] ? _raw_spin_unlock+0x40/0x40 [ 96.209845][ T4462] hci_rfkill_set_block+0x10a/0x190 [ 96.215161][ T4462] ? rcu_lock_release+0x20/0x20 [ 96.220335][ T4462] rfkill_set_block+0x1c9/0x3d0 [ 96.225385][ T4462] rfkill_fop_write+0x2e7/0x560 [ 96.230389][ T4462] ? rfkill_fop_read+0x520/0x520 [ 96.235361][ T4462] ? common_file_perm+0x140/0x1c0 [ 96.240427][ T4462] ? fsnotify_perm+0x5d/0x560 [ 96.245116][ T4462] ? security_file_permission+0x75/0xa0 [ 96.250680][ T4462] ? rfkill_fop_read+0x520/0x520 [ 96.255642][ T4462] vfs_write+0x30b/0xd60 [ 96.259919][ T4462] ? file_end_write+0x250/0x250 [ 96.264876][ T4462] ? __context_tracking_exit+0x4c/0x80 [ 96.270598][ T4462] ? __lock_acquire+0x7d10/0x7d10 [ 96.275710][ T4462] ? __fdget_pos+0x1e2/0x370 [ 96.280333][ T4462] ksys_write+0x152/0x260 [ 96.285115][ T4462] ? __ia32_sys_read+0x80/0x80 [ 96.290178][ T4462] ? lockdep_hardirqs_on+0x94/0x140 [ 96.295462][ T4462] do_syscall_64+0x4c/0xa0 [ 96.299930][ T4462] ? clear_bhb_loop+0x30/0x80 [ 96.304948][ T4462] ? clear_bhb_loop+0x30/0x80 [ 96.309822][ T4462] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 96.316137][ T4462] RIP: 0033:0x7fd339c5add9 [ 96.320860][ T4462] 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 [ 96.340830][ T4462] RSP: 002b:00007fffd654ebb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 96.349353][ T4462] RAX: ffffffffffffffda RBX: 00007fd339ed3fa0 RCX: 00007fd339c5add9 [ 96.357352][ T4462] RDX: 0000000000000008 RSI: 0000200000000100 RDI: 0000000000000003 [ 96.365338][ T4462] RBP: 00007fd339cf0d69 R08: 0000000000000000 R09: 0000000000000000 [ 96.373327][ T4462] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 96.381316][ T4462] R13: 00007fd339ed3fac R14: 00007fd339ed3fa0 R15: 00007fd339ed3fa0 [ 96.389315][ T4462]