UBSAN: signed-integer-overflow in ip_idents_reserve ================================================================================ UBSAN: signed-integer-overflow in ./arch/x86/include/asm/atomic.h:165:11 -2019885640 + -807740059 cannot be represented in type 'int' CPU: 0 PID: 18 Comm: kworker/u2:1 Not tainted syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: wg-kex-wg0 wg_packet_handshake_send_worker Call Trace: dump_stack+0xfd/0x16e lib/dump_stack.c:118 ubsan_epilogue+0xa/0x30 lib/ubsan.c:148 handle_overflow+0x192/0x1b0 lib/ubsan.c:180 arch_atomic_add_return arch/x86/include/asm/atomic.h:165 [inline] atomic_add_return include/asm-generic/atomic-instrumented.h:73 [inline] ip_idents_reserve+0x14a/0x170 net/ipv4/route.c:521 __ip_select_ident+0xe4/0x1c0 net/ipv4/route.c:538 iptunnel_xmit+0x468/0x850 net/ipv4/ip_tunnel_core.c:80 udp_tunnel_xmit_skb+0x1ba/0x290 net/ipv4/udp_tunnel_core.c:190 send4+0x5d4/0xaf0 drivers/net/wireguard/socket.c:85 wg_socket_send_skb_to_peer+0xcd/0x1c0 drivers/net/wireguard/socket.c:175 wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:40 [inline] wg_packet_handshake_send_worker+0x16b/0x280 drivers/net/wireguard/send.c:51 process_one_work+0x85e/0xff0 kernel/workqueue.c:2282 worker_thread+0xa9b/0x1430 kernel/workqueue.c:2428 kthread+0x386/0x410 kernel/kthread.c:328 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 ================================================================================ Kernel panic - not syncing: UBSAN: panic_on_warn set ... CPU: 0 PID: 18 Comm: kworker/u2:1 Not tainted syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: wg-kex-wg0 wg_packet_handshake_send_worker Call Trace: dump_stack+0xfd/0x16e lib/dump_stack.c:118 panic+0x2f0/0x9c0 kernel/panic.c:308 check_panic_on_warn+0x95/0xe0 kernel/panic.c:228 handle_overflow+0x192/0x1b0 lib/ubsan.c:180 arch_atomic_add_return arch/x86/include/asm/atomic.h:165 [inline] atomic_add_return include/asm-generic/atomic-instrumented.h:73 [inline] ip_idents_reserve+0x14a/0x170 net/ipv4/route.c:521 __ip_select_ident+0xe4/0x1c0 net/ipv4/route.c:538 iptunnel_xmit+0x468/0x850 net/ipv4/ip_tunnel_core.c:80 udp_tunnel_xmit_skb+0x1ba/0x290 net/ipv4/udp_tunnel_core.c:190 send4+0x5d4/0xaf0 drivers/net/wireguard/socket.c:85 wg_socket_send_skb_to_peer+0xcd/0x1c0 drivers/net/wireguard/socket.c:175 wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:40 [inline] wg_packet_handshake_send_worker+0x16b/0x280 drivers/net/wireguard/send.c:51 process_one_work+0x85e/0xff0 kernel/workqueue.c:2282 worker_thread+0xa9b/0x1430 kernel/workqueue.c:2428 kthread+0x386/0x410 kernel/kthread.c:328 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Kernel Offset: disabled Rebooting in 86400 seconds.. Warning: Permanently added '[localhost]:28111' (ED25519) to the list of known hosts. 2025/10/29 06:58:12 parsed 1 programs [ 62.830601][ T5530] cgroup: Unknown subsys name 'net' [ 62.902616][ T5530] cgroup: Unknown subsys name 'rlimit' [ 64.737714][ T5530] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 65.784553][ T5538] IPVS: ftp: loaded support on port[0] = 21 [ 66.040402][ T5545] IPVS: ftp: loaded support on port[0] = 21 [ 66.152184][ T5550] IPVS: ftp: loaded support on port[0] = 21 [ 66.327770][ T5556] IPVS: ftp: loaded support on port[0] = 21 [ 66.433560][ T5561] IPVS: ftp: loaded support on port[0] = 21 [ 66.538002][ T5565] IPVS: ftp: loaded support on port[0] = 21 [ 66.602751][ T5568] IPVS: ftp: loaded support on port[0] = 21 [ 66.703903][ T5577] IPVS: ftp: loaded support on port[0] = 21 [ 66.788540][ T5582] IPVS: ftp: loaded support on port[0] = 21 [ 66.879874][ T5590] IPVS: ftp: loaded support on port[0] = 21 [ 66.918189][ T3028] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 66.936502][ T3028] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 66.944822][ T3064] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 66.955599][ T3026] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 66.962360][ T3064] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 66.973044][ T3026] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 67.040325][ T5590] syz-executor (5590) used greatest stack depth: 25232 bytes left [ 67.138508][ T5596] IPVS: ftp: loaded support on port[0] = 21 [ 67.266872][ T5601] IPVS: ftp: loaded support on port[0] = 21 [ 67.364872][ T5606] IPVS: ftp: loaded support on port[0] = 21 [ 67.488340][ T5611] IPVS: ftp: loaded support on port[0] = 21 [ 67.494258][ T5606] syz-executor (5606) used greatest stack depth: 24080 bytes left [ 67.562827][ T5611] chnl_net:caif_netlink_parms(): no params data found [ 67.593470][ T5611] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.599656][ T5611] bridge0: port 1(bridge_slave_0) entered disabled state [ 67.606168][ T5611] device bridge_slave_0 entered promiscuous mode [ 67.616167][ T5611] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.622537][ T5611] bridge0: port 2(bridge_slave_1) entered disabled state [ 67.629391][ T5611] device bridge_slave_1 entered promiscuous mode [ 67.647243][ T5611] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 67.656060][ T5611] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 67.673418][ T5611] team0: Port device team_slave_0 added [ 67.679742][ T5611] team0: Port device team_slave_1 added [ 67.691024][ T5611] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 67.696724][ T5611] 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. [ 67.718144][ T5611] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 67.731027][ T5611] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 67.737249][ T5611] 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. [ 67.760722][ T5611] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 67.785539][ T5611] device hsr_slave_0 entered promiscuous mode [ 67.791207][ T5611] device hsr_slave_1 entered promiscuous mode [ 67.854822][ T5611] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 67.865801][ T5611] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 67.873438][ T5611] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 67.884685][ T5611] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 67.899786][ T5611] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.905654][ T5611] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.911973][ T5611] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.917929][ T5611] bridge0: port 1(bridge_slave_0) entered forwarding state [ 67.927012][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 67.933710][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 67.983157][ T5611] 8021q: adding VLAN 0 to HW filter on device bond0 [ 67.995675][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 68.002972][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 68.011862][ T5611] 8021q: adding VLAN 0 to HW filter on device team0 [ 68.020482][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 68.028107][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 68.036938][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 68.042897][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 68.066711][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 68.074575][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 68.082418][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 68.088382][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 68.098672][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 68.106383][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 68.114081][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 68.121511][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 68.128557][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 68.136348][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 68.148382][ T5611] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 68.157971][ T5611] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 68.169647][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 68.176791][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 68.184147][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 68.192849][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 68.200597][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 68.211993][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 68.264908][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 68.274253][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 68.284585][ T5611] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 68.299619][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 68.309954][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 68.323019][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 68.330406][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 68.339328][ T5611] device veth0_vlan entered promiscuous mode [ 68.344545][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 68.352498][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 68.361873][ T5611] device veth1_vlan entered promiscuous mode [ 68.376021][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 68.383303][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 68.391055][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 68.397965][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 68.406921][ T5611] device veth0_macvtap entered promiscuous mode [ 68.414723][ T5611] device veth1_macvtap entered promiscuous mode [ 68.425757][ T5611] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 68.433042][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 68.441160][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 68.447869][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 68.455758][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 68.466334][ T5611] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 68.474620][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 68.484249][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 68.493648][ T5611] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 68.501791][ T5611] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 68.509791][ T5611] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 68.517150][ T5611] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 68.591440][ T3064] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 68.601952][ T5611] syz-executor (5611) used greatest stack depth: 23632 bytes left [ 68.614356][ T5629] IPVS: ftp: loaded support on port[0] = 21 [ 68.650891][ T3064] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 68.692502][ T3064] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 68.741017][ T3064] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 2025/10/29 06:58:20 executed programs: 0 [ 69.143110][ T3064] device hsr_slave_0 left promiscuous mode [ 69.162153][ T3064] device hsr_slave_1 left promiscuous mode [ 69.175543][ T3064] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 69.186909][ T3064] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 69.204983][ T3064] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 69.219006][ T3064] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 69.232095][ T3064] device bridge_slave_1 left promiscuous mode [ 69.237243][ T3064] bridge0: port 2(bridge_slave_1) entered disabled state [ 69.244272][ T3064] device bridge_slave_0 left promiscuous mode [ 69.250209][ T3064] bridge0: port 1(bridge_slave_0) entered disabled state [ 69.258105][ T3064] device veth1_macvtap left promiscuous mode [ 69.263439][ T3064] device veth0_macvtap left promiscuous mode [ 69.268526][ T3064] device veth1_vlan left promiscuous mode [ 69.273970][ T3064] device veth0_vlan left promiscuous mode [ 69.345098][ T3064] team0 (unregistering): Port device team_slave_1 removed [ 69.354561][ T3064] team0 (unregistering): Port device team_slave_0 removed [ 69.364694][ T3064] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 69.375000][ T3064] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 69.403423][ T3064] bond0 (unregistering): Released all slaves [ 69.434090][ T5642] IPVS: ftp: loaded support on port[0] = 21 [ 69.582790][ T5642] chnl_net:caif_netlink_parms(): no params data found [ 69.667475][ T5642] bridge0: port 1(bridge_slave_0) entered blocking state [ 69.674397][ T5642] bridge0: port 1(bridge_slave_0) entered disabled state [ 69.681686][ T5642] device bridge_slave_0 entered promiscuous mode [ 69.694017][ T5642] bridge0: port 2(bridge_slave_1) entered blocking state [ 69.700247][ T5642] bridge0: port 2(bridge_slave_1) entered disabled state [ 69.706610][ T5642] device bridge_slave_1 entered promiscuous mode [ 69.733788][ T5642] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 69.747170][ T5642] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 69.779976][ T5642] team0: Port device team_slave_0 added [ 69.800425][ T5642] team0: Port device team_slave_1 added [ 69.834284][ T5642] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 69.843684][ T5642] 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. [ 69.865691][ T5642] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 69.891182][ T5642] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 69.897038][ T5642] 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. [ 69.921611][ T5642] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 69.964197][ T5642] device hsr_slave_0 entered promiscuous mode [ 69.972789][ T5642] device hsr_slave_1 entered promiscuous mode [ 70.182131][ T5642] lapbether: lapb_disconnect_request err: 4 [ 70.276346][ T5642] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 70.288213][ T5642] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 70.297597][ T5642] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 70.318378][ T5642] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 70.389719][ T5642] 8021q: adding VLAN 0 to HW filter on device bond0 [ 70.409943][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 70.419522][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 70.437802][ T5642] 8021q: adding VLAN 0 to HW filter on device team0 [ 70.451376][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 70.469770][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 70.479580][ T3064] bridge0: port 1(bridge_slave_0) entered blocking state [ 70.485463][ T3064] bridge0: port 1(bridge_slave_0) entered forwarding state [ 70.501571][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 70.519322][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 70.530517][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 70.544647][ T3064] bridge0: port 2(bridge_slave_1) entered blocking state [ 70.550487][ T3064] bridge0: port 2(bridge_slave_1) entered forwarding state [ 70.571038][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 70.589277][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 70.609215][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 70.622557][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 70.645088][ T5642] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 70.659370][ T5642] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 70.680648][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 70.693499][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 70.710380][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 70.729176][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 70.735975][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 70.748332][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 70.755431][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 70.767133][ T3064] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 70.851896][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 70.858310][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 70.903168][ T5642] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 70.924407][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 70.939773][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 70.965961][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 70.979808][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 70.990815][ T5642] device veth0_vlan entered promiscuous mode [ 71.009168][ T5642] device veth1_vlan entered promiscuous mode [ 71.020626][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 71.027572][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 71.034919][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 71.050903][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 71.069164][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 71.077341][ T5642] device veth0_macvtap entered promiscuous mode [ 71.091361][ T5642] device veth1_macvtap entered promiscuous mode [ 71.114348][ T5642] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 71.129562][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 71.149254][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 71.174019][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 71.182444][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 71.192075][ T5642] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 71.199436][ T5552] Bluetooth: hci0: command 0x0409 tx timeout [ 71.207401][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 71.216600][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 71.225130][ T5642] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.232611][ T5642] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.240594][ T5642] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.247798][ T5642] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.261221][ T18] ================================================================================ [ 71.269106][ T18] UBSAN: signed-integer-overflow in ./arch/x86/include/asm/atomic.h:165:11 [ 71.276219][ T18] -2019885640 + -807740059 cannot be represented in type 'int' [ 71.283786][ T18] CPU: 0 PID: 18 Comm: kworker/u2:1 Not tainted syzkaller #0 [ 71.289828][ T18] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 71.298954][ T18] Workqueue: wg-kex-wg0 wg_packet_handshake_send_worker [ 71.304794][ T18] Call Trace: [ 71.307563][ T18] dump_stack+0xfd/0x16e [ 71.311161][ T18] ubsan_epilogue+0xa/0x30 [ 71.314861][ T18] handle_overflow+0x192/0x1b0 [ 71.318888][ T18] ? prandom_u32+0x217/0x260 [ 71.322642][ T18] ip_idents_reserve+0x14a/0x170 [ 71.326669][ T18] __ip_select_ident+0xe4/0x1c0 [ 71.330707][ T18] iptunnel_xmit+0x468/0x850 [ 71.334195][ T18] udp_tunnel_xmit_skb+0x1ba/0x290 [ 71.339230][ T18] send4+0x5d4/0xaf0 [ 71.342867][ T18] wg_socket_send_skb_to_peer+0xcd/0x1c0 [ 71.347693][ T18] wg_packet_handshake_send_worker+0x16b/0x280 [ 71.352663][ T18] process_one_work+0x85e/0xff0 [ 71.356884][ T18] worker_thread+0xa9b/0x1430 [ 71.360897][ T18] ? rcu_lock_release+0x20/0x20 [ 71.364935][ T18] kthread+0x386/0x410 [ 71.368482][ T18] ? rcu_lock_release+0x20/0x20 [ 71.372390][ T18] ? kthread_blkcg+0xd0/0xd0 [ 71.375781][ T18] ret_from_fork+0x1f/0x30 [ 71.379566][ T18] ================================================================================ [ 71.387217][ T18] Kernel panic - not syncing: UBSAN: panic_on_warn set ... [ 71.393104][ T18] CPU: 0 PID: 18 Comm: kworker/u2:1 Not tainted syzkaller #0 [ 71.399114][ T18] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 71.408160][ T18] Workqueue: wg-kex-wg0 wg_packet_handshake_send_worker [ 71.414156][ T18] Call Trace: [ 71.417188][ T18] dump_stack+0xfd/0x16e [ 71.420967][ T18] panic+0x2f0/0x9c0 [ 71.424430][ T18] check_panic_on_warn+0x95/0xe0 [ 71.428743][ T18] handle_overflow+0x192/0x1b0 [ 71.432930][ T18] ? prandom_u32+0x217/0x260 [ 71.436898][ T18] ip_idents_reserve+0x14a/0x170 [ 71.441112][ T18] __ip_select_ident+0xe4/0x1c0 [ 71.445312][ T18] iptunnel_xmit+0x468/0x850 [ 71.449115][ T18] udp_tunnel_xmit_skb+0x1ba/0x290 [ 71.453280][ T18] send4+0x5d4/0xaf0 [ 71.456201][ T18] wg_socket_send_skb_to_peer+0xcd/0x1c0 [ 71.460527][ T18] wg_packet_handshake_send_worker+0x16b/0x280 [ 71.465615][ T18] process_one_work+0x85e/0xff0 [ 71.469572][ T18] worker_thread+0xa9b/0x1430 [ 71.473324][ T18] ? rcu_lock_release+0x20/0x20 [ 71.477283][ T18] kthread+0x386/0x410 [ 71.480523][ T18] ? rcu_lock_release+0x20/0x20 [ 71.484387][ T18] ? kthread_blkcg+0xd0/0xd0 [ 71.488208][ T18] ret_from_fork+0x1f/0x30 [ 71.492146][ T18] Kernel Offset: disabled [ 71.495730][ T18] Rebooting in 86400 seconds.. VM DIAGNOSIS: 06:58:23 Registers: info registers vcpu 0 CPU#0 RAX=0000000000000035 RBX=0000000000000035 RCX=0000000000000000 RDX=00000000000003f8 RSI=0000000000000000 RDI=0000000000000020 RBP=00000000000003f8 RSP=ffffc900004474e0 R8 =dffffc0000000000 R9 =fffff52000088e9e R10=fffff52000088e9e R11=ffffffff83f79a10 R12=dffffc0000000000 R13=1ffffffff2acda63 R14=ffffffff96156de0 R15=0000000000000000 RIP=ffffffff83f79a88 RFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 ffffffff 00c00000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 ffffffff 00c00000 FS =0000 0000000000000000 ffffffff 00c00000 GS =0000 ffff888020600000 ffffffff 00c00000 LDT=0000 0000000000000000 ffffffff 00c00000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=000055ec27667138 CR3=0000000043634000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000fffe0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 Opmask00=0000000040410888 Opmask01=0000000000000fff Opmask02=00000000ffffffef Opmask03=0000000000000000 Opmask04=0000000000000000 Opmask05=0000000000000000 Opmask06=0000000000000000 Opmask07=0000000000000000 ZMM00=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 f355cd647307d4c2 51d4b723dcb325af ZMM01=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 26195827148f8856 4d1b0056103add89 ZMM02=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 2c6ab98a59c84769 0c19a67f179cb7b0 ZMM03=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 98f8c731bc7af26e 50572e4e173ad50d ZMM04=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 00000000ffffffff 00000000000000b4 ZMM05=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000034 ZMM06=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 23b200baf12ac9b1 29de2f777b44f240 ZMM07=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 cf80a9126fe300a7 0000000000000000 ZMM08=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 18ccb5714dc74210 2bba947427f4907b ZMM09=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 3173397400000000 1cc648d34cadc558 ZMM10=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 aaf6f61383f4a386 0071d80388ad288b ZMM11=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 8923c588afb379c3 f77fbc576435674e ZMM12=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM13=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM14=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 a54ff53a3c6ef372 bb67ae856a09e667 ZMM15=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 5be0cd191f83d9ab 9b05688c510e527f ZMM16=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM17=0000000000000000 0000000000000000 0000000000000000 0000000000000000 2525252525252525 2525252525252525 2525252525252525 2525252525252525 ZMM18=0000000000000000 0000000000000000 0000000000000000 0000000000000000 00306e6170737265 0030657267367069 00306c6e74367069 00306974765f3670 ZMM19=0000000000000000 0000000000000000 0000000000000000 0000000000000000 6900306974765f70 6900306c6e757400 3074697300326777 0031677700306777 ZMM20=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM21=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM22=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM23=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM24=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM25=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM26=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM27=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM28=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM29=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM30=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM31=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 syzkaller build log: go env (err=) AR='ar' CC='gcc' CGO_CFLAGS='-O2 -g' CGO_CPPFLAGS='' CGO_CXXFLAGS='-O2 -g' CGO_ENABLED='1' CGO_FFLAGS='-O2 -g' CGO_LDFLAGS='-O2 -g' CXX='g++' GCCGO='gccgo' GO111MODULE='auto' GOAMD64='v1' GOARCH='amd64' GOAUTH='netrc' GOBIN='' GOCACHE='/syzkaller/.cache/go-build' GOCACHEPROG='' GODEBUG='' GOENV='/syzkaller/.config/go/env' GOEXE='' GOEXPERIMENT='' GOFIPS140='off' GOFLAGS='' GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build2970195748=/tmp/go-build -gno-record-gcc-switches' GOHOSTARCH='amd64' GOHOSTOS='linux' GOINSECURE='' GOMOD='/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod' GOMODCACHE='/syzkaller/jobs/linux/gopath/pkg/mod' GONOPROXY='' GONOSUMDB='' GOOS='linux' GOPATH='/syzkaller/jobs/linux/gopath' GOPRIVATE='' GOPROXY='https://proxy.golang.org,direct' GOROOT='/usr/local/go' GOSUMDB='sum.golang.org' GOTELEMETRY='local' GOTELEMETRYDIR='/syzkaller/.config/go/telemetry' GOTMPDIR='' GOTOOLCHAIN='auto' GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64' GOVCS='' GOVERSION='go1.24.4' GOWORK='' PKG_CONFIG='pkg-config' git status (err=) HEAD detached at 6b6b5f21aad 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=6b6b5f21aadcc3fc3ccd91da0b782a4307229d70 -X github.com/google/syzkaller/prog.gitRevisionDate=20250604-135810" -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=\"6b6b5f21aadcc3fc3ccd91da0b782a4307229d70\" /usr/bin/ld: /tmp/ccWtMwwi.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