possible deadlock in lapbeth_device_event ============================================ WARNING: possible recursive locking detected 6.14.0-syzkaller-07422-gacb4f33713b9 #0 Not tainted -------------------------------------------- dhcpcd/5492 is trying to acquire lock: ffff8880309e0d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2751 [inline] ffff8880309e0d28 (&dev->lock){+.+.}-{4:4}, at: netif_napi_add_weight include/linux/netdevice.h:2783 [inline] ffff8880309e0d28 (&dev->lock){+.+.}-{4:4}, at: lapbeth_new_device drivers/net/wan/lapbether.c:415 [inline] ffff8880309e0d28 (&dev->lock){+.+.}-{4:4}, at: lapbeth_device_event+0x766/0xa20 drivers/net/wan/lapbether.c:460 but task is already holding lock: ffff8880125c0d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2751 [inline] ffff8880125c0d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:42 [inline] ffff8880125c0d28 (&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/5492: #0: ffffffff900cf5c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #0: ffffffff900cf5c8 (rtnl_mutex){+.+.}-{4:4}, at: devinet_ioctl+0x34e/0x1d80 net/ipv4/devinet.c:1121 #1: ffff8880125c0d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2751 [inline] #1: ffff8880125c0d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:42 [inline] #1: ffff8880125c0d28 (&dev->lock){+.+.}-{4:4}, at: dev_change_flags+0x120/0x270 net/core/dev_api.c:67 stack backtrace: CPU: 1 UID: 0 PID: 5492 Comm: dhcpcd Not tainted 6.14.0-syzkaller-07422-gacb4f33713b9 #0 PREEMPT(full) 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+0x2be/0x2d0 kernel/locking/lockdep.c:3042 check_deadlock kernel/locking/lockdep.c:3094 [inline] validate_chain+0x928/0x24e0 kernel/locking/lockdep.c:3896 __lock_acquire+0xad5/0xd80 kernel/locking/lockdep.c:5235 lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 __mutex_lock_common kernel/locking/mutex.c:587 [inline] __mutex_lock+0x1a5/0x10c0 kernel/locking/mutex.c:732 netdev_lock include/linux/netdevice.h:2751 [inline] netif_napi_add_weight include/linux/netdevice.h:2783 [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+0x209/0x410 net/core/dev.c:-1 netif_change_flags+0xf0/0x1a0 net/core/dev.c:9438 dev_change_flags+0x146/0x270 net/core/dev_api.c:68 devinet_ioctl+0xea4/0x1d80 net/ipv4/devinet.c:1200 inet_ioctl+0x3d9/0x4f0 net/ipv4/af_inet.c:1001 sock_do_ioctl+0x15a/0x490 net/socket.c:1190 sock_ioctl+0x644/0x900 net/socket.c:1311 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7a024ded49 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:00007ffc70f16ee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7a024106c0 RCX: 00007f7a024ded49 RDX: 00007ffc70f270d8 RSI: 0000000000008914 RDI: 000000000000000f RBP: 00007ffc70f37298 R08: 00007ffc70f27098 R09: 00007ffc70f27048 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc70f270d8 R14: 0000000000000028 R15: 0000000000008914 Warning: Permanently added '10.128.0.29' (ED25519) to the list of known hosts. 2025/03/28 08:15:12 ignoring optional flag "sandboxArg"="0" 2025/03/28 08:15:13 parsed 1 programs [ 61.974889][ T5824] cgroup: Unknown subsys name 'net' [ 62.053539][ T5824] cgroup: Unknown subsys name 'cpuset' [ 62.061343][ T5824] cgroup: Unknown subsys name 'rlimit' [ 63.285566][ T5824] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 65.595355][ T5830] 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. [ 67.001659][ T5867] chnl_net:caif_netlink_parms(): no params data found [ 67.058618][ T5867] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.066408][ T5867] bridge0: port 1(bridge_slave_0) entered disabled state [ 67.073864][ T5867] bridge_slave_0: entered allmulticast mode [ 67.080467][ T5867] bridge_slave_0: entered promiscuous mode [ 67.088702][ T5867] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.096072][ T5867] bridge0: port 2(bridge_slave_1) entered disabled state [ 67.103588][ T5867] bridge_slave_1: entered allmulticast mode [ 67.110199][ T5867] bridge_slave_1: entered promiscuous mode [ 67.130019][ T5867] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 67.141436][ T5867] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 67.163624][ T5867] team0: Port device team_slave_0 added [ 67.171733][ T5867] team0: Port device team_slave_1 added [ 67.187954][ T5867] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 67.194996][ T5867] 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. [ 67.221466][ T5867] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 67.233903][ T5867] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 67.241354][ T5867] 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. [ 67.267389][ T5867] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 67.295871][ T5867] hsr_slave_0: entered promiscuous mode [ 67.302052][ T5867] hsr_slave_1: entered promiscuous mode [ 67.381968][ T5867] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 67.393578][ T5867] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 67.404175][ T5867] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 67.414397][ T5867] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 67.435890][ T5867] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.443062][ T5867] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.450780][ T5867] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.457916][ T5867] bridge0: port 1(bridge_slave_0) entered forwarding state [ 67.499706][ T5867] 8021q: adding VLAN 0 to HW filter on device bond0 [ 67.514869][ T82] bridge0: port 1(bridge_slave_0) entered disabled state [ 67.524794][ T82] bridge0: port 2(bridge_slave_1) entered disabled state [ 67.538914][ T5867] 8021q: adding VLAN 0 to HW filter on device team0 [ 67.550254][ T82] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.557384][ T82] bridge0: port 1(bridge_slave_0) entered forwarding state [ 67.569867][ T2984] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.576992][ T2984] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.683503][ T5867] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 67.715122][ T5867] veth0_vlan: entered promiscuous mode [ 67.725092][ T5867] veth1_vlan: entered promiscuous mode [ 67.746052][ T5867] veth0_macvtap: entered promiscuous mode [ 67.754686][ T5867] veth1_macvtap: entered promiscuous mode [ 67.768819][ T5867] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 67.783516][ T5867] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 67.794314][ T5867] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 67.804373][ T5867] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 67.814073][ T5867] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 67.822991][ T5867] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 67.925710][ T12] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 67.945460][ T5886] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 67.953721][ T5886] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 67.963528][ T5886] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 67.975555][ T5886] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 67.976615][ T12] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 67.994057][ T5886] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 68.053236][ T12] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 68.137406][ T12] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 68.464249][ T2984] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 68.475916][ T2984] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 68.497861][ T2984] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 68.506811][ T2984] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 2025/03/28 08:15:22 executed programs: 0 [ 69.283371][ T5886] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 69.291439][ T5886] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 69.299112][ T5886] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 69.309931][ T5886] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 69.317799][ T5886] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 69.410331][ T5932] chnl_net:caif_netlink_parms(): no params data found [ 69.458942][ T5932] bridge0: port 1(bridge_slave_0) entered blocking state [ 69.467144][ T5932] bridge0: port 1(bridge_slave_0) entered disabled state [ 69.474461][ T5932] bridge_slave_0: entered allmulticast mode [ 69.481583][ T5932] bridge_slave_0: entered promiscuous mode [ 69.489131][ T5932] bridge0: port 2(bridge_slave_1) entered blocking state [ 69.496710][ T5932] bridge0: port 2(bridge_slave_1) entered disabled state [ 69.504292][ T5932] bridge_slave_1: entered allmulticast mode [ 69.511891][ T5932] bridge_slave_1: entered promiscuous mode [ 69.529868][ T5932] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 69.540821][ T5932] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 69.568349][ T5932] team0: Port device team_slave_0 added [ 69.576703][ T5932] team0: Port device team_slave_1 added [ 69.595097][ T5932] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 69.602496][ T5932] 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. [ 69.629332][ T5932] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 69.642933][ T5932] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 69.649896][ T5932] 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. [ 69.676726][ T5932] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 69.708028][ T5932] hsr_slave_0: entered promiscuous mode [ 69.715560][ T5932] hsr_slave_1: entered promiscuous mode [ 69.722477][ T5932] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 69.730177][ T5932] Cannot create hsr debugfs directory [ 71.381960][ T5886] Bluetooth: hci0: command tx timeout [ 71.467394][ T1300] ieee802154 phy0 wpan0: encryption failed: -22 [ 71.474147][ T1300] ieee802154 phy1 wpan1: encryption failed: -22 [ 71.492852][ T12] bridge_slave_1: left allmulticast mode [ 71.498755][ T12] bridge_slave_1: left promiscuous mode [ 71.507906][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 71.523306][ T12] bridge_slave_0: left allmulticast mode [ 71.529001][ T12] bridge_slave_0: left promiscuous mode [ 71.535064][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 71.717686][ T12] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 71.728457][ T12] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 71.738755][ T12] bond0 (unregistering): Released all slaves [ 71.859978][ T12] hsr_slave_0: left promiscuous mode [ 71.866077][ T12] hsr_slave_1: left promiscuous mode [ 71.876231][ T12] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 71.885389][ T12] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 71.894246][ T12] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 71.901764][ T12] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 71.916969][ T12] veth1_macvtap: left promiscuous mode [ 71.922946][ T12] veth0_macvtap: left promiscuous mode [ 71.928549][ T12] veth1_vlan: left promiscuous mode [ 71.935811][ T12] veth0_vlan: left promiscuous mode [ 72.196299][ T12] team0 (unregistering): Port device team_slave_1 removed [ 72.221483][ T12] team0 (unregistering): Port device team_slave_0 removed [ 72.424896][ T5492] [ 72.427302][ T5492] ============================================ [ 72.433469][ T5492] WARNING: possible recursive locking detected [ 72.439647][ T5492] 6.14.0-syzkaller-07422-gacb4f33713b9 #0 Not tainted [ 72.446401][ T5492] -------------------------------------------- [ 72.452547][ T5492] dhcpcd/5492 is trying to acquire lock: [ 72.458161][ T5492] ffff8880309e0d28 (&dev->lock){+.+.}-{4:4}, at: lapbeth_device_event+0x766/0xa20 [ 72.467477][ T5492] [ 72.467477][ T5492] but task is already holding lock: [ 72.475009][ T5492] ffff8880125c0d28 (&dev->lock){+.+.}-{4:4}, at: dev_change_flags+0x120/0x270 [ 72.483898][ T5492] [ 72.483898][ T5492] other info that might help us debug this: [ 72.491940][ T5492] Possible unsafe locking scenario: [ 72.491940][ T5492] [ 72.499390][ T5492] CPU0 [ 72.502654][ T5492] ---- [ 72.505913][ T5492] lock(&dev->lock); [ 72.509875][ T5492] lock(&dev->lock); [ 72.513843][ T5492] [ 72.513843][ T5492] *** DEADLOCK *** [ 72.513843][ T5492] [ 72.521969][ T5492] May be due to missing lock nesting notation [ 72.521969][ T5492] [ 72.530298][ T5492] 2 locks held by dhcpcd/5492: [ 72.535069][ T5492] #0: ffffffff900cf5c8 (rtnl_mutex){+.+.}-{4:4}, at: devinet_ioctl+0x34e/0x1d80 [ 72.544247][ T5492] #1: ffff8880125c0d28 (&dev->lock){+.+.}-{4:4}, at: dev_change_flags+0x120/0x270 [ 72.553562][ T5492] [ 72.553562][ T5492] stack backtrace: [ 72.559458][ T5492] CPU: 1 UID: 0 PID: 5492 Comm: dhcpcd Not tainted 6.14.0-syzkaller-07422-gacb4f33713b9 #0 PREEMPT(full) [ 72.559474][ T5492] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 72.559485][ T5492] Call Trace: [ 72.559490][ T5492] [ 72.559496][ T5492] dump_stack_lvl+0x241/0x360 [ 72.559514][ T5492] ? __pfx_dump_stack_lvl+0x10/0x10 [ 72.559528][ T5492] ? __pfx__printk+0x10/0x10 [ 72.559542][ T5492] ? print_lock+0x171/0x1a0 [ 72.559554][ T5492] print_deadlock_bug+0x2be/0x2d0 [ 72.559567][ T5492] validate_chain+0x928/0x24e0 [ 72.559579][ T5492] ? stack_depot_save_flags+0x3a/0x970 [ 72.559595][ T5492] ? look_up_lock_class+0x7b/0x170 [ 72.559610][ T5492] ? register_lock_class+0x54/0x330 [ 72.559627][ T5492] __lock_acquire+0xad5/0xd80 [ 72.559645][ T5492] lock_acquire+0x116/0x2f0 [ 72.559660][ T5492] ? lapbeth_device_event+0x766/0xa20 [ 72.559679][ T5492] __mutex_lock+0x1a5/0x10c0 [ 72.559700][ T5492] ? lapbeth_device_event+0x766/0xa20 [ 72.559718][ T5492] ? ref_tracker_alloc+0x316/0x4c0 [ 72.559732][ T5492] ? lapbeth_device_event+0x766/0xa20 [ 72.559747][ T5492] ? rcu_is_watching+0x15/0xb0 [ 72.559759][ T5492] ? __pfx___mutex_lock+0x10/0x10 [ 72.559777][ T5492] ? __raw_spin_lock_init+0x45/0x100 [ 72.559791][ T5492] lapbeth_device_event+0x766/0xa20 [ 72.559809][ T5492] notifier_call_chain+0x1a5/0x3f0 [ 72.559823][ T5492] __dev_notify_flags+0x209/0x410 [ 72.559836][ T5492] ? __pfx___dev_notify_flags+0x10/0x10 [ 72.559846][ T5492] ? __dev_change_flags+0x517/0x700 [ 72.559857][ T5492] ? __pfx___mutex_lock+0x10/0x10 [ 72.559872][ T5492] ? __pfx___dev_change_flags+0x10/0x10 [ 72.559884][ T5492] ? __pfx___mutex_lock+0x10/0x10 [ 72.559899][ T5492] netif_change_flags+0xf0/0x1a0 [ 72.559912][ T5492] dev_change_flags+0x146/0x270 [ 72.559930][ T5492] devinet_ioctl+0xea4/0x1d80 [ 72.559950][ T5492] ? __pfx_devinet_ioctl+0x10/0x10 [ 72.559966][ T5492] ? get_user_ifreq+0x1bb/0x200 [ 72.559981][ T5492] inet_ioctl+0x3d9/0x4f0 [ 72.559994][ T5492] ? __pfx_inet_ioctl+0x10/0x10 [ 72.560005][ T5492] ? lockdep_hardirqs_on+0x9d/0x150 [ 72.560024][ T5492] ? tomoyo_path_number_perm+0x215/0x790 [ 72.560038][ T5492] sock_do_ioctl+0x15a/0x490 [ 72.560061][ T5492] ? __pfx_sock_do_ioctl+0x10/0x10 [ 72.560077][ T5492] ? __asan_memset+0x23/0x50 [ 72.560092][ T5492] ? smack_file_ioctl+0x2a7/0x3b0 [ 72.560111][ T5492] sock_ioctl+0x644/0x900 [ 72.560125][ T5492] ? __pfx_sock_ioctl+0x10/0x10 [ 72.560139][ T5492] ? __pfx___rseq_handle_notify_resume+0x10/0x10 [ 72.560154][ T5492] ? __pfx_sock_ioctl+0x10/0x10 [ 72.560168][ T5492] __se_sys_ioctl+0xf1/0x160 [ 72.560185][ T5492] do_syscall_64+0xf3/0x230 [ 72.560201][ T5492] ? clear_bhb_loop+0x45/0xa0 [ 72.560214][ T5492] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 72.560229][ T5492] RIP: 0033:0x7f7a024ded49 [ 72.560242][ T5492] 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 [ 72.560252][ T5492] RSP: 002b:00007ffc70f16ee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 72.560265][ T5492] RAX: ffffffffffffffda RBX: 00007f7a024106c0 RCX: 00007f7a024ded49 [ 72.560274][ T5492] RDX: 00007ffc70f270d8 RSI: 0000000000008914 RDI: 000000000000000f [ 72.560282][ T5492] RBP: 00007ffc70f37298 R08: 00007ffc70f27098 R09: 00007ffc70f27048 [ 72.560291][ T5492] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 72.560299][ T5492] R13: 00007ffc70f270d8 R14: 0000000000000028 R15: 0000000000008914 [ 72.560310][ T5492] [ 73.119320][ T5932] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 73.128423][ T5932] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 73.137856][ T5932] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 73.152427][ T5932] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 73.216024][ T5932] 8021q: adding VLAN 0 to HW filter on device bond0 [ 73.230017][ T5932] 8021q: adding VLAN 0 to HW filter on device team0 [ 73.240561][ T2984] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.247687][ T2984] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.262815][ T2984] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.270095][ T2984] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.393908][ T5932] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 73.427239][ T5932] veth0_vlan: entered promiscuous mode [ 73.437641][ T5932] veth1_vlan: entered promiscuous mode [ 73.458142][ T5932] veth0_macvtap: entered promiscuous mode [ 73.461859][ T5886] Bluetooth: hci0: command tx timeout [ 73.469013][ T5932] veth1_macvtap: entered promiscuous mode [ 73.483961][ T5932] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 73.493847][ T5932] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 73.505725][ T5932] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.514836][ T5932] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.524682][ T5932] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.535546][ T5932] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.565886][ T5932] ieee80211 phy5: Selected rate control algorithm 'minstrel_ht' [ 73.587599][ T13] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 73.596547][ T13] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 73.605604][ T5932] ieee80211 phy6: Selected rate control algorithm 'minstrel_ht' [ 73.626670][ T13] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 73.635885][ T13] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 73.704474][ T5824] syz-executor (5824) used greatest stack depth: 20160 bytes left 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-build745269104=/tmp/go-build -gno-record-gcc-switches' git status (err=) HEAD detached at 1a5d9317ecf 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=1a5d9317ecfa21e32cf9c876306c7b5f665999bf -X 'github.com/google/syzkaller/prog.gitRevisionDate=20250312-180915'" -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=\"1a5d9317ecfa21e32cf9c876306c7b5f665999bf\" /usr/bin/ld: /tmp/ccQMDOrd.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