possible deadlock in lapbeth_device_event ============================================ WARNING: possible recursive locking detected 6.14.0-rc7-syzkaller-01431-gbfc17c165835 #0 Not tainted -------------------------------------------- dhcpcd/5502 is trying to acquire lock: ffff8880647fcd28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2731 [inline] ffff8880647fcd28 (&dev->lock){+.+.}-{4:4}, at: netif_napi_add_weight include/linux/netdevice.h:2763 [inline] ffff8880647fcd28 (&dev->lock){+.+.}-{4:4}, at: lapbeth_new_device drivers/net/wan/lapbether.c:415 [inline] ffff8880647fcd28 (&dev->lock){+.+.}-{4:4}, at: lapbeth_device_event+0x766/0xa20 drivers/net/wan/lapbether.c:460 but task is already holding lock: ffff8880647f8d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2731 [inline] ffff8880647f8d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:40 [inline] ffff8880647f8d28 (&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/5502: #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: ffff8880647f8d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2731 [inline] #1: ffff8880647f8d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:40 [inline] #1: ffff8880647f8d28 (&dev->lock){+.+.}-{4:4}, at: dev_change_flags+0x120/0x270 net/core/dev_api.c:67 stack backtrace: CPU: 0 UID: 0 PID: 5502 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: 0033:0x7fd6a5842d49 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:00007ffcd7155828 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fd6a57746c0 RCX: 00007fd6a5842d49 RDX: 00007ffcd7165a18 RSI: 0000000000008914 RDI: 0000000000000005 RBP: 00007ffcd7175bd8 R08: 00007ffcd71659d8 R09: 00007ffcd7165988 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcd7165a18 R14: 0000000000000028 R15: 0000000000008914 Warning: Permanently added '10.128.0.132' (ED25519) to the list of known hosts. 2025/03/24 01:00:36 ignoring optional flag "sandboxArg"="0" 2025/03/24 01:00:37 parsed 1 programs [ 65.868800][ T5834] cgroup: Unknown subsys name 'net' [ 66.029824][ T5834] cgroup: Unknown subsys name 'cpuset' [ 66.037677][ T5834] cgroup: Unknown subsys name 'rlimit' [ 67.373165][ T5834] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 69.758199][ T5841] 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. [ 70.548802][ T36] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 70.558000][ T36] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 70.584050][ T36] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 70.592112][ T36] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 71.654184][ T5902] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 71.663199][ T5902] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 71.672071][ T5902] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 71.682024][ T5902] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 71.690135][ T5902] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3 [ 71.697970][ T5902] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 71.809961][ T1297] ieee802154 phy0 wpan0: encryption failed: -22 [ 71.822673][ T1297] ieee802154 phy1 wpan1: encryption failed: -22 [ 72.821147][ T5921] chnl_net:caif_netlink_parms(): no params data found [ 72.894437][ T5921] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.902733][ T5921] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.910819][ T5921] bridge_slave_0: entered allmulticast mode [ 72.918652][ T5921] bridge_slave_0: entered promiscuous mode [ 72.928664][ T5921] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.935890][ T5921] bridge0: port 2(bridge_slave_1) entered disabled state [ 72.943038][ T5921] bridge_slave_1: entered allmulticast mode [ 72.950060][ T5921] bridge_slave_1: entered promiscuous mode [ 72.973621][ T5921] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 72.984684][ T5921] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 73.008605][ T5921] team0: Port device team_slave_0 added [ 73.016266][ T5921] team0: Port device team_slave_1 added [ 73.035431][ T5921] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 73.042506][ T5921] 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. [ 73.069287][ T5921] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 73.081852][ T5921] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 73.088941][ T5921] 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. [ 73.115009][ T5921] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 73.146226][ T5921] hsr_slave_0: entered promiscuous mode [ 73.152509][ T5921] hsr_slave_1: entered promiscuous mode [ 73.246439][ T5921] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 73.260121][ T5921] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 73.270366][ T5921] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 73.279722][ T5921] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 73.303218][ T5921] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.310575][ T5921] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.318680][ T5921] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.325855][ T5921] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.372384][ T5921] 8021q: adding VLAN 0 to HW filter on device bond0 [ 73.391791][ T36] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.400755][ T36] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.414789][ T5921] 8021q: adding VLAN 0 to HW filter on device team0 [ 73.431154][ T36] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.438666][ T36] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.451766][ T53] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.459098][ T53] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.580794][ T5921] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 73.612921][ T5921] veth0_vlan: entered promiscuous mode [ 73.623194][ T5921] veth1_vlan: entered promiscuous mode [ 73.647015][ T5921] veth0_macvtap: entered promiscuous mode [ 73.655391][ T5921] veth1_macvtap: entered promiscuous mode [ 73.671391][ T5921] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 73.684057][ T5921] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 73.694781][ T5921] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.703698][ T5921] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.713359][ T5921] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.723104][ T5921] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.859530][ T53] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 73.921657][ T53] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 73.978744][ T53] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 74.031379][ T53] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 2025/03/24 01:00:48 executed programs: 0 [ 74.249739][ T5147] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 74.258019][ T5147] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 74.267508][ T5147] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 74.275386][ T5147] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 74.283502][ T5147] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3 [ 74.292029][ T5147] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 74.395733][ T5942] chnl_net:caif_netlink_parms(): no params data found [ 74.442791][ T5942] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.450181][ T5942] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.457841][ T5942] bridge_slave_0: entered allmulticast mode [ 74.464840][ T5942] bridge_slave_0: entered promiscuous mode [ 74.474572][ T5942] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.482175][ T5942] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.489775][ T5942] bridge_slave_1: entered allmulticast mode [ 74.497105][ T5942] bridge_slave_1: entered promiscuous mode [ 74.519200][ T5942] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 74.530419][ T5942] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 74.559909][ T5942] team0: Port device team_slave_0 added [ 74.567941][ T5942] team0: Port device team_slave_1 added [ 74.587131][ T5942] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 74.594098][ T5942] 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. [ 74.620643][ T5942] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 74.633445][ T5942] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 74.641027][ T5942] 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. [ 74.667421][ T5942] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 74.709940][ T5942] hsr_slave_0: entered promiscuous mode [ 74.716676][ T5942] hsr_slave_1: entered promiscuous mode [ 74.722653][ T5942] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 74.730964][ T5942] Cannot create hsr debugfs directory [ 76.366768][ T5902] Bluetooth: hci0: command tx timeout [ 76.879578][ T53] bridge_slave_1: left allmulticast mode [ 76.885471][ T53] bridge_slave_1: left promiscuous mode [ 76.893880][ T53] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.908001][ T53] bridge_slave_0: left allmulticast mode [ 76.913683][ T53] bridge_slave_0: left promiscuous mode [ 76.919847][ T53] bridge0: port 1(bridge_slave_0) entered disabled state [ 77.232883][ T53] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 77.244698][ T53] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 77.258388][ T53] bond0 (unregistering): Released all slaves [ 77.380554][ T53] hsr_slave_0: left promiscuous mode [ 77.398321][ T53] hsr_slave_1: left promiscuous mode [ 77.413007][ T53] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 77.424763][ T53] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 77.442341][ T53] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 77.454851][ T53] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 77.477956][ T53] veth1_macvtap: left promiscuous mode [ 77.484017][ T53] veth0_macvtap: left promiscuous mode [ 77.492575][ T53] veth1_vlan: left promiscuous mode [ 77.498284][ T53] veth0_vlan: left promiscuous mode [ 77.867155][ T53] team0 (unregistering): Port device team_slave_1 removed [ 77.900048][ T53] team0 (unregistering): Port device team_slave_0 removed [ 78.165468][ T5502] [ 78.167840][ T5502] ============================================ [ 78.173992][ T5502] WARNING: possible recursive locking detected [ 78.180243][ T5502] 6.14.0-rc7-syzkaller-01431-gbfc17c165835 #0 Not tainted [ 78.187363][ T5502] -------------------------------------------- [ 78.193514][ T5502] dhcpcd/5502 is trying to acquire lock: [ 78.199130][ T5502] ffff8880647fcd28 (&dev->lock){+.+.}-{4:4}, at: lapbeth_device_event+0x766/0xa20 [ 78.208454][ T5502] [ 78.208454][ T5502] but task is already holding lock: [ 78.216014][ T5502] ffff8880647f8d28 (&dev->lock){+.+.}-{4:4}, at: dev_change_flags+0x120/0x270 [ 78.224912][ T5502] [ 78.224912][ T5502] other info that might help us debug this: [ 78.232981][ T5502] Possible unsafe locking scenario: [ 78.232981][ T5502] [ 78.240423][ T5502] CPU0 [ 78.243700][ T5502] ---- [ 78.246967][ T5502] lock(&dev->lock); [ 78.250942][ T5502] lock(&dev->lock); [ 78.254916][ T5502] [ 78.254916][ T5502] *** DEADLOCK *** [ 78.254916][ T5502] [ 78.263046][ T5502] May be due to missing lock nesting notation [ 78.263046][ T5502] [ 78.271349][ T5502] 2 locks held by dhcpcd/5502: [ 78.276124][ T5502] #0: ffffffff8fed7108 (rtnl_mutex){+.+.}-{4:4}, at: devinet_ioctl+0x34c/0x1d80 [ 78.285255][ T5502] #1: ffff8880647f8d28 (&dev->lock){+.+.}-{4:4}, at: dev_change_flags+0x120/0x270 [ 78.294652][ T5502] [ 78.294652][ T5502] stack backtrace: [ 78.300563][ T5502] CPU: 0 UID: 0 PID: 5502 Comm: dhcpcd Not tainted 6.14.0-rc7-syzkaller-01431-gbfc17c165835 #0 [ 78.300580][ T5502] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 78.300593][ T5502] Call Trace: [ 78.300600][ T5502] [ 78.300606][ T5502] dump_stack_lvl+0x241/0x360 [ 78.300626][ T5502] ? __pfx_dump_stack_lvl+0x10/0x10 [ 78.300638][ T5502] ? __pfx__printk+0x10/0x10 [ 78.300650][ T5502] ? lockdep_unlock+0x16a/0x300 [ 78.300670][ T5502] print_deadlock_bug+0x483/0x620 [ 78.300686][ T5502] validate_chain+0x15e2/0x5920 [ 78.300703][ T5502] ? is_bpf_text_address+0x26/0x2a0 [ 78.300717][ T5502] ? unwind_next_frame+0x18e6/0x22d0 [ 78.300736][ T5502] ? __pfx_validate_chain+0x10/0x10 [ 78.300749][ T5502] ? preempt_count_add+0x93/0x190 [ 78.300766][ T5502] ? is_bpf_text_address+0x285/0x2a0 [ 78.300789][ T5502] ? is_bpf_text_address+0x26/0x2a0 [ 78.300801][ T5502] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 78.300817][ T5502] ? kernel_text_address+0xa7/0xe0 [ 78.300831][ T5502] ? look_up_lock_class+0x77/0x170 [ 78.300849][ T5502] ? register_lock_class+0x102/0x980 [ 78.300867][ T5502] ? __pfx_register_lock_class+0x10/0x10 [ 78.300886][ T5502] ? mark_lock+0x9a/0x360 [ 78.300898][ T5502] __lock_acquire+0x1397/0x2100 [ 78.300928][ T5502] lock_acquire+0x1ed/0x550 [ 78.300945][ T5502] ? lapbeth_device_event+0x766/0xa20 [ 78.300961][ T5502] ? __pfx_lock_acquire+0x10/0x10 [ 78.300979][ T5502] ? __pfx___might_resched+0x10/0x10 [ 78.300999][ T5502] __mutex_lock+0x19c/0x1010 [ 78.301018][ T5502] ? lapbeth_device_event+0x766/0xa20 [ 78.301032][ T5502] ? __asan_memset+0x23/0x50 [ 78.301046][ T5502] ? lapbeth_device_event+0x766/0xa20 [ 78.301059][ T5502] ? __pfx___mutex_lock+0x10/0x10 [ 78.301080][ T5502] ? __raw_spin_lock_init+0x45/0x100 [ 78.301096][ T5502] lapbeth_device_event+0x766/0xa20 [ 78.301110][ T5502] notifier_call_chain+0x1a5/0x3f0 [ 78.301129][ T5502] __dev_notify_flags+0x207/0x400 [ 78.301143][ T5502] ? dev_set_rx_mode+0xb8/0x2e0 [ 78.301157][ T5502] ? __pfx___dev_notify_flags+0x10/0x10 [ 78.301171][ T5502] ? __dev_change_flags+0x515/0x6f0 [ 78.301185][ T5502] ? __pfx___mutex_lock+0x10/0x10 [ 78.301203][ T5502] ? __pfx___dev_change_flags+0x10/0x10 [ 78.301217][ T5502] ? __pfx___mutex_lock+0x10/0x10 [ 78.301234][ T5502] netif_change_flags+0xf0/0x1a0 [ 78.301250][ T5502] dev_change_flags+0x146/0x270 [ 78.301264][ T5502] devinet_ioctl+0xea2/0x1d80 [ 78.301281][ T5502] ? __pfx_devinet_ioctl+0x10/0x10 [ 78.301295][ T5502] ? get_user_ifreq+0x1bb/0x200 [ 78.301312][ T5502] inet_ioctl+0x3d7/0x4f0 [ 78.301328][ T5502] ? __pfx_inet_ioctl+0x10/0x10 [ 78.301344][ T5502] ? tomoyo_path_number_perm+0x5dd/0x770 [ 78.301368][ T5502] sock_do_ioctl+0x158/0x460 [ 78.301387][ T5502] ? __pfx_sock_do_ioctl+0x10/0x10 [ 78.301404][ T5502] ? __pfx_lock_release+0x10/0x10 [ 78.301425][ T5502] sock_ioctl+0x626/0x8e0 [ 78.301442][ T5502] ? __pfx_sock_ioctl+0x10/0x10 [ 78.301459][ T5502] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 78.301478][ T5502] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 78.301540][ T5502] ? __pfx_sock_ioctl+0x10/0x10 [ 78.301557][ T5502] __se_sys_ioctl+0xf5/0x170 [ 78.301572][ T5502] do_syscall_64+0xf3/0x230 [ 78.301590][ T5502] ? clear_bhb_loop+0x35/0x90 [ 78.301609][ T5502] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 78.301634][ T5502] RIP: 0033:0x7fd6a5842d49 [ 78.301651][ T5502] 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 [ 78.301661][ T5502] RSP: 002b:00007ffcd7155828 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 78.301677][ T5502] RAX: ffffffffffffffda RBX: 00007fd6a57746c0 RCX: 00007fd6a5842d49 [ 78.301686][ T5502] RDX: 00007ffcd7165a18 RSI: 0000000000008914 RDI: 0000000000000005 [ 78.301694][ T5502] RBP: 00007ffcd7175bd8 R08: 00007ffcd71659d8 R09: 00007ffcd7165988 [ 78.301702][ T5502] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 78.301710][ T5502] R13: 00007ffcd7165a18 R14: 0000000000000028 R15: 0000000000008914 [ 78.301722][ T5502] [ 78.701827][ T5902] Bluetooth: hci0: command tx timeout [ 78.848258][ T5942] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 78.860312][ T5942] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 78.876461][ T5942] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 78.886958][ T5942] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 78.958450][ T5942] 8021q: adding VLAN 0 to HW filter on device bond0 [ 78.972709][ T5942] 8021q: adding VLAN 0 to HW filter on device team0 [ 78.982865][ T36] bridge0: port 1(bridge_slave_0) entered blocking state [ 78.989986][ T36] bridge0: port 1(bridge_slave_0) entered forwarding state [ 79.008228][ T36] bridge0: port 2(bridge_slave_1) entered blocking state [ 79.015386][ T36] bridge0: port 2(bridge_slave_1) entered forwarding state [ 79.084787][ T5942] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 79.112985][ T5942] veth0_vlan: entered promiscuous mode [ 79.121366][ T5942] veth1_vlan: entered promiscuous mode [ 79.139947][ T5942] veth0_macvtap: entered promiscuous mode [ 79.148123][ T5942] veth1_macvtap: entered promiscuous mode [ 79.159370][ T5942] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 79.170606][ T5942] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 79.180994][ T5942] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.189942][ T5942] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.198781][ T5942] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.208055][ T5942] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.230251][ T5942] ieee80211 phy5: Selected rate control algorithm 'minstrel_ht' [ 79.245996][ T12] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 79.247267][ T5942] ieee80211 phy6: Selected rate control algorithm 'minstrel_ht' [ 79.253941][ T12] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 79.280533][ T82] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 79.288845][ T82] 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-build3728185846=/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/ccQvddBG.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