possible deadlock in lapbeth_device_event ============================================ WARNING: possible recursive locking detected 6.14.0-rc7-syzkaller-01431-gbfc17c165835 #0 Not tainted -------------------------------------------- dhcpcd/5503 is trying to acquire lock: ffff888078f90d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2731 [inline] ffff888078f90d28 (&dev->lock){+.+.}-{4:4}, at: netif_napi_add_weight include/linux/netdevice.h:2763 [inline] ffff888078f90d28 (&dev->lock){+.+.}-{4:4}, at: lapbeth_new_device drivers/net/wan/lapbether.c:415 [inline] ffff888078f90d28 (&dev->lock){+.+.}-{4:4}, at: lapbeth_device_event+0x766/0xa20 drivers/net/wan/lapbether.c:460 but task is already holding lock: ffff888060a64d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2731 [inline] ffff888060a64d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:40 [inline] ffff888060a64d28 (&dev->lock){+.+.}-{4:4}, at: dev_change_flags+0x120/0x270 net/core/dev_api.c:67 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&dev->lock); lock(&dev->lock); *** DEADLOCK *** May be due to missing lock nesting notation 2 locks held by dhcpcd/5503: #0: ffffffff8fed7108 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #0: ffffffff8fed7108 (rtnl_mutex){+.+.}-{4:4}, at: devinet_ioctl+0x34c/0x1d80 net/ipv4/devinet.c:1121 #1: ffff888060a64d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2731 [inline] #1: ffff888060a64d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:40 [inline] #1: ffff888060a64d28 (&dev->lock){+.+.}-{4:4}, at: dev_change_flags+0x120/0x270 net/core/dev_api.c:67 stack backtrace: CPU: 1 UID: 0 PID: 5503 Comm: dhcpcd Not tainted 6.14.0-rc7-syzkaller-01431-gbfc17c165835 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_deadlock_bug+0x483/0x620 kernel/locking/lockdep.c:3039 check_deadlock kernel/locking/lockdep.c:3091 [inline] validate_chain+0x15e2/0x5920 kernel/locking/lockdep.c:3893 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x19c/0x1010 kernel/locking/mutex.c:730 netdev_lock include/linux/netdevice.h:2731 [inline] netif_napi_add_weight include/linux/netdevice.h:2763 [inline] lapbeth_new_device drivers/net/wan/lapbether.c:415 [inline] lapbeth_device_event+0x766/0xa20 drivers/net/wan/lapbether.c:460 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85 __dev_notify_flags+0x207/0x400 netif_change_flags+0xf0/0x1a0 net/core/dev.c:9406 dev_change_flags+0x146/0x270 net/core/dev_api.c:68 devinet_ioctl+0xea2/0x1d80 net/ipv4/devinet.c:1200 inet_ioctl+0x3d7/0x4f0 net/ipv4/af_inet.c:1001 sock_do_ioctl+0x158/0x460 net/socket.c:1190 sock_ioctl+0x626/0x8e0 net/socket.c:1309 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f83c7febd49 Code: 5c c3 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 76 10 48 8b 15 ae 60 0d 00 f7 d8 41 83 c8 RSP: 002b:00007ffc8fef0278 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f83c7f1d6c0 RCX: 00007f83c7febd49 RDX: 00007ffc8ff00468 RSI: 0000000000008914 RDI: 000000000000000c RBP: 00007ffc8ff10628 R08: 00007ffc8ff00428 R09: 00007ffc8ff003d8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc8ff00468 R14: 0000000000000028 R15: 0000000000008914 Warning: Permanently added '10.128.10.16' (ED25519) to the list of known hosts. 2025/03/24 03:06:56 ignoring optional flag "sandboxArg"="0" 2025/03/24 03:06:57 parsed 1 programs [ 70.418489][ T5836] cgroup: Unknown subsys name 'net' [ 70.566448][ T5836] cgroup: Unknown subsys name 'cpuset' [ 70.574495][ T5836] cgroup: Unknown subsys name 'rlimit' [ 71.859350][ T5836] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 71.897155][ T1295] ieee802154 phy0 wpan0: encryption failed: -22 [ 71.903926][ T1295] ieee802154 phy1 wpan1: encryption failed: -22 [ 74.348406][ T5842] soft_limit_in_bytes is deprecated and will be removed. Please report your usecase to linux-mm@kvack.org if you depend on this functionality. [ 74.548475][ T36] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.556725][ T36] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.579067][ T36] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.587616][ T36] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.815672][ T5856] chnl_net:caif_netlink_parms(): no params data found [ 74.899711][ T5856] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.908503][ T5856] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.916462][ T5856] bridge_slave_0: entered allmulticast mode [ 74.924029][ T5856] bridge_slave_0: entered promiscuous mode [ 74.946872][ T5856] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.954201][ T5856] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.961864][ T5856] bridge_slave_1: entered allmulticast mode [ 74.969337][ T5856] bridge_slave_1: entered promiscuous mode [ 74.996034][ T5856] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 75.007658][ T5856] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 75.043518][ T5856] team0: Port device team_slave_0 added [ 75.051670][ T5856] team0: Port device team_slave_1 added [ 75.074222][ T5856] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 75.081339][ T5856] 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. [ 75.107861][ T5856] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 75.121826][ T5856] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 75.128925][ T5856] 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. [ 75.155129][ T5856] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 75.193148][ T5856] hsr_slave_0: entered promiscuous mode [ 75.199515][ T5856] hsr_slave_1: entered promiscuous mode [ 75.301560][ T5856] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 75.314925][ T5856] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 75.325342][ T5856] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 75.335082][ T5856] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 75.361087][ T5856] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.368374][ T5856] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.376599][ T5856] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.383787][ T5856] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.437492][ T5856] 8021q: adding VLAN 0 to HW filter on device bond0 [ 75.453084][ T36] bridge0: port 1(bridge_slave_0) entered disabled state [ 75.462254][ T36] bridge0: port 2(bridge_slave_1) entered disabled state [ 75.477434][ T5856] 8021q: adding VLAN 0 to HW filter on device team0 [ 75.496542][ T4137] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.503832][ T4137] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.513395][ T4137] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.520604][ T4137] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.644614][ T5856] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 75.681703][ T5856] veth0_vlan: entered promiscuous mode [ 75.692050][ T5856] veth1_vlan: entered promiscuous mode [ 75.719094][ T5856] veth0_macvtap: entered promiscuous mode [ 75.728792][ T5856] veth1_macvtap: entered promiscuous mode [ 75.745329][ T5856] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 75.759210][ T5856] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 75.771789][ T5856] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.781571][ T5856] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.790727][ T5856] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.799874][ T5856] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.940018][ T1335] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 75.961587][ T5876] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 75.970814][ T5876] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 75.979926][ T5876] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 75.988396][ T5876] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 76.006204][ T5876] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3 [ 76.013893][ T5876] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 76.015681][ T1335] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 76.095432][ T1335] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 76.175584][ T1335] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 2025/03/24 03:07:07 executed programs: 0 [ 78.452595][ T5876] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 78.461546][ T5876] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 78.470807][ T5876] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 78.480407][ T5876] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 78.489555][ T5876] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3 [ 78.498237][ T5876] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 78.598087][ T5940] chnl_net:caif_netlink_parms(): no params data found [ 78.645629][ T5940] bridge0: port 1(bridge_slave_0) entered blocking state [ 78.653203][ T5940] bridge0: port 1(bridge_slave_0) entered disabled state [ 78.660506][ T5940] bridge_slave_0: entered allmulticast mode [ 78.667763][ T5940] bridge_slave_0: entered promiscuous mode [ 78.675590][ T5940] bridge0: port 2(bridge_slave_1) entered blocking state [ 78.684259][ T5940] bridge0: port 2(bridge_slave_1) entered disabled state [ 78.691997][ T5940] bridge_slave_1: entered allmulticast mode [ 78.699476][ T5940] bridge_slave_1: entered promiscuous mode [ 78.722050][ T5940] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 78.733829][ T5940] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 78.765136][ T5940] team0: Port device team_slave_0 added [ 78.786885][ T5940] team0: Port device team_slave_1 added [ 78.845351][ T5940] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 78.852467][ T5940] 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. [ 78.880893][ T5940] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 78.892584][ T1335] bridge_slave_1: left allmulticast mode [ 78.899530][ T1335] bridge_slave_1: left promiscuous mode [ 78.906380][ T1335] bridge0: port 2(bridge_slave_1) entered disabled state [ 78.917049][ T1335] bridge_slave_0: left allmulticast mode [ 78.922818][ T1335] bridge_slave_0: left promiscuous mode [ 78.929038][ T1335] bridge0: port 1(bridge_slave_0) entered disabled state [ 79.191336][ T1335] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 79.202632][ T1335] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 79.213364][ T1335] bond0 (unregistering): Released all slaves [ 79.223965][ T5940] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 79.231049][ T5940] 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. [ 79.259559][ T5940] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 79.326479][ T5940] hsr_slave_0: entered promiscuous mode [ 79.335463][ T5940] hsr_slave_1: entered promiscuous mode [ 79.341685][ T5940] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 79.349910][ T5940] Cannot create hsr debugfs directory [ 79.376935][ T1335] hsr_slave_0: left promiscuous mode [ 79.384298][ T1335] hsr_slave_1: left promiscuous mode [ 79.390475][ T1335] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 79.398205][ T1335] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 79.406994][ T1335] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 79.414652][ T1335] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 79.429395][ T1335] veth1_macvtap: left promiscuous mode [ 79.435393][ T1335] veth0_macvtap: left promiscuous mode [ 79.441034][ T1335] veth1_vlan: left promiscuous mode [ 79.446742][ T1335] veth0_vlan: left promiscuous mode [ 79.749286][ T1335] team0 (unregistering): Port device team_slave_1 removed [ 79.785500][ T1335] team0 (unregistering): Port device team_slave_0 removed [ 80.384803][ T5503] [ 80.387257][ T5503] ============================================ [ 80.393580][ T5503] WARNING: possible recursive locking detected [ 80.399747][ T5503] 6.14.0-rc7-syzkaller-01431-gbfc17c165835 #0 Not tainted [ 80.406877][ T5503] -------------------------------------------- [ 80.413545][ T5503] dhcpcd/5503 is trying to acquire lock: [ 80.419353][ T5503] ffff888078f90d28 (&dev->lock){+.+.}-{4:4}, at: lapbeth_device_event+0x766/0xa20 [ 80.428574][ T5503] [ 80.428574][ T5503] but task is already holding lock: [ 80.435939][ T5503] ffff888060a64d28 (&dev->lock){+.+.}-{4:4}, at: dev_change_flags+0x120/0x270 [ 80.445127][ T5503] [ 80.445127][ T5503] other info that might help us debug this: [ 80.453413][ T5503] Possible unsafe locking scenario: [ 80.453413][ T5503] [ 80.460868][ T5503] CPU0 [ 80.464232][ T5503] ---- [ 80.467533][ T5503] lock(&dev->lock); [ 80.471596][ T5503] lock(&dev->lock); [ 80.475569][ T5503] [ 80.475569][ T5503] *** DEADLOCK *** [ 80.475569][ T5503] [ 80.483799][ T5503] May be due to missing lock nesting notation [ 80.483799][ T5503] [ 80.492110][ T5503] 2 locks held by dhcpcd/5503: [ 80.496859][ T5503] #0: ffffffff8fed7108 (rtnl_mutex){+.+.}-{4:4}, at: devinet_ioctl+0x34c/0x1d80 [ 80.506011][ T5503] #1: ffff888060a64d28 (&dev->lock){+.+.}-{4:4}, at: dev_change_flags+0x120/0x270 [ 80.515370][ T5503] [ 80.515370][ T5503] stack backtrace: [ 80.521474][ T5503] CPU: 1 UID: 0 PID: 5503 Comm: dhcpcd Not tainted 6.14.0-rc7-syzkaller-01431-gbfc17c165835 #0 [ 80.521493][ T5503] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 80.521505][ T5503] Call Trace: [ 80.521512][ T5503] [ 80.521519][ T5503] dump_stack_lvl+0x241/0x360 [ 80.521539][ T5503] ? __pfx_dump_stack_lvl+0x10/0x10 [ 80.521552][ T5503] ? __pfx__printk+0x10/0x10 [ 80.521564][ T5503] ? lockdep_unlock+0x16a/0x300 [ 80.521583][ T5503] print_deadlock_bug+0x483/0x620 [ 80.521598][ T5503] validate_chain+0x15e2/0x5920 [ 80.521615][ T5503] ? is_bpf_text_address+0x26/0x2a0 [ 80.521629][ T5503] ? unwind_next_frame+0x18e6/0x22d0 [ 80.521647][ T5503] ? __pfx_validate_chain+0x10/0x10 [ 80.521660][ T5503] ? preempt_count_add+0x93/0x190 [ 80.521677][ T5503] ? is_bpf_text_address+0x285/0x2a0 [ 80.521687][ T5503] ? is_bpf_text_address+0x26/0x2a0 [ 80.521699][ T5503] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 80.521715][ T5503] ? kernel_text_address+0xa7/0xe0 [ 80.521728][ T5503] ? look_up_lock_class+0x77/0x170 [ 80.521746][ T5503] ? register_lock_class+0x102/0x980 [ 80.521764][ T5503] ? __pfx_register_lock_class+0x10/0x10 [ 80.521783][ T5503] ? mark_lock+0x9a/0x360 [ 80.521795][ T5503] __lock_acquire+0x1397/0x2100 [ 80.521817][ T5503] lock_acquire+0x1ed/0x550 [ 80.521834][ T5503] ? lapbeth_device_event+0x766/0xa20 [ 80.521849][ T5503] ? __pfx_lock_acquire+0x10/0x10 [ 80.521867][ T5503] ? __pfx___might_resched+0x10/0x10 [ 80.521887][ T5503] __mutex_lock+0x19c/0x1010 [ 80.521904][ T5503] ? lapbeth_device_event+0x766/0xa20 [ 80.521918][ T5503] ? __asan_memset+0x23/0x50 [ 80.521931][ T5503] ? lapbeth_device_event+0x766/0xa20 [ 80.521944][ T5503] ? __pfx___mutex_lock+0x10/0x10 [ 80.521964][ T5503] ? __raw_spin_lock_init+0x45/0x100 [ 80.521980][ T5503] lapbeth_device_event+0x766/0xa20 [ 80.521993][ T5503] notifier_call_chain+0x1a5/0x3f0 [ 80.522012][ T5503] __dev_notify_flags+0x207/0x400 [ 80.522027][ T5503] ? dev_set_rx_mode+0xb8/0x2e0 [ 80.522041][ T5503] ? __pfx___dev_notify_flags+0x10/0x10 [ 80.522053][ T5503] ? __dev_change_flags+0x515/0x6f0 [ 80.522067][ T5503] ? __pfx___mutex_lock+0x10/0x10 [ 80.522083][ T5503] ? __pfx___dev_change_flags+0x10/0x10 [ 80.522097][ T5503] ? __pfx___mutex_lock+0x10/0x10 [ 80.522115][ T5503] netif_change_flags+0xf0/0x1a0 [ 80.522130][ T5503] dev_change_flags+0x146/0x270 [ 80.522144][ T5503] devinet_ioctl+0xea2/0x1d80 [ 80.522160][ T5503] ? __pfx_devinet_ioctl+0x10/0x10 [ 80.522172][ T5503] ? get_user_ifreq+0x1bb/0x200 [ 80.522189][ T5503] inet_ioctl+0x3d7/0x4f0 [ 80.522205][ T5503] ? __pfx_inet_ioctl+0x10/0x10 [ 80.522220][ T5503] ? tomoyo_path_number_perm+0x5dd/0x770 [ 80.522253][ T5503] sock_do_ioctl+0x158/0x460 [ 80.522271][ T5503] ? __pfx_sock_do_ioctl+0x10/0x10 [ 80.522289][ T5503] ? __pfx_lock_release+0x10/0x10 [ 80.522309][ T5503] sock_ioctl+0x626/0x8e0 [ 80.522326][ T5503] ? __pfx_sock_ioctl+0x10/0x10 [ 80.522343][ T5503] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 80.522362][ T5503] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 80.522380][ T5503] ? __pfx_sock_ioctl+0x10/0x10 [ 80.522396][ T5503] __se_sys_ioctl+0xf5/0x170 [ 80.522410][ T5503] do_syscall_64+0xf3/0x230 [ 80.522428][ T5503] ? clear_bhb_loop+0x35/0x90 [ 80.522446][ T5503] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 80.522468][ T5503] RIP: 0033:0x7f83c7febd49 [ 80.522485][ T5503] Code: 5c c3 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 76 10 48 8b 15 ae 60 0d 00 f7 d8 41 83 c8 [ 80.522496][ T5503] RSP: 002b:00007ffc8fef0278 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 80.522510][ T5503] RAX: ffffffffffffffda RBX: 00007f83c7f1d6c0 RCX: 00007f83c7febd49 [ 80.522520][ T5503] RDX: 00007ffc8ff00468 RSI: 0000000000008914 RDI: 000000000000000c [ 80.522533][ T5503] RBP: 00007ffc8ff10628 R08: 00007ffc8ff00428 R09: 00007ffc8ff003d8 [ 80.522542][ T5503] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 80.522549][ T5503] R13: 00007ffc8ff00468 R14: 0000000000000028 R15: 0000000000008914 [ 80.522562][ T5503] [ 80.922124][ T5147] Bluetooth: hci0: command tx timeout [ 81.015931][ T5940] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 81.028944][ T5940] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 81.038971][ T5940] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 81.047992][ T5940] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 81.105284][ T5940] 8021q: adding VLAN 0 to HW filter on device bond0 [ 81.125155][ T5940] 8021q: adding VLAN 0 to HW filter on device team0 [ 81.135906][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 81.143079][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 81.162592][ T4137] bridge0: port 2(bridge_slave_1) entered blocking state [ 81.169749][ T4137] bridge0: port 2(bridge_slave_1) entered forwarding state [ 81.192520][ T5940] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 81.204908][ T5940] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 81.303174][ T5940] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 81.330236][ T5940] veth0_vlan: entered promiscuous mode [ 81.340290][ T5940] veth1_vlan: entered promiscuous mode [ 81.357838][ T5940] veth0_macvtap: entered promiscuous mode [ 81.366026][ T5940] veth1_macvtap: entered promiscuous mode [ 81.378282][ T5940] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 81.390290][ T5940] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 81.401731][ T5940] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 81.411339][ T5940] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 81.420589][ T5940] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 81.429951][ T5940] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 81.455877][ T5940] ieee80211 phy5: Selected rate control algorithm 'minstrel_ht' [ 81.473182][ T12] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 81.474135][ T5940] ieee80211 phy6: Selected rate control algorithm 'minstrel_ht' [ 81.481190][ T12] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 81.508320][ T13] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 81.516624][ T13] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 syzkaller build log: go env (err=) GO111MODULE='auto' GOARCH='amd64' GOBIN='' GOCACHE='/syzkaller/.cache/go-build' GOENV='/syzkaller/.config/go/env' GOEXE='' GOEXPERIMENT='' GOFLAGS='' GOHOSTARCH='amd64' GOHOSTOS='linux' GOINSECURE='' GOMODCACHE='/syzkaller/jobs-2/linux/gopath/pkg/mod' GONOPROXY='' GONOSUMDB='' GOOS='linux' GOPATH='/syzkaller/jobs-2/linux/gopath' GOPRIVATE='' GOPROXY='https://proxy.golang.org,direct' GOROOT='/syzkaller/jobs-2/linux/gopath/pkg/mod/golang.org/toolchain@v0.0.1-go1.23.6.linux-amd64' GOSUMDB='sum.golang.org' GOTMPDIR='' GOTOOLCHAIN='auto' GOTOOLDIR='/syzkaller/jobs-2/linux/gopath/pkg/mod/golang.org/toolchain@v0.0.1-go1.23.6.linux-amd64/pkg/tool/linux_amd64' GOVCS='' GOVERSION='go1.23.6' GODEBUG='' GOTELEMETRY='local' GOTELEMETRYDIR='/syzkaller/.config/go/telemetry' GCCGO='gccgo' GOAMD64='v1' AR='ar' CC='gcc' CXX='g++' CGO_ENABLED='1' GOMOD='/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod' GOWORK='' CGO_CFLAGS='-O2 -g' CGO_CPPFLAGS='' CGO_CXXFLAGS='-O2 -g' CGO_FFLAGS='-O2 -g' CGO_LDFLAGS='-O2 -g' PKG_CONFIG='pkg-config' GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build4110412069=/tmp/go-build -gno-record-gcc-switches' git status (err=) HEAD detached at 831e362911 nothing to commit, working tree clean tput: No value for $TERM and no -T specified tput: No value for $TERM and no -T specified Makefile:31: run command via tools/syz-env for best compatibility, see: Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen make .descriptions tput: No value for $TERM and no -T specified tput: No value for $TERM and no -T specified Makefile:31: run command via tools/syz-env for best compatibility, see: Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env bin/syz-sysgen touch .descriptions GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=831e3629115be4f5e68e6e0df3a5b07eed26daa4 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20250305-205027'" -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog mkdir -p ./bin/linux_amd64 g++ -o ./bin/linux_amd64/syz-executor executor/executor.cc \ -m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -std=c++17 -I. -Iexecutor/_include -DGOOS_linux=1 -DGOARCH_amd64=1 \ -DHOSTGOOS_linux=1 -DGIT_REVISION=\"831e3629115be4f5e68e6e0df3a5b07eed26daa4\" /usr/bin/ld: /tmp/ccmm9D81.o: in function `Connection::Connect(char const*, char const*)': executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x104): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking