[ 51.263301][ T136] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 52.302244][ T136] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 52.342212][ T136] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 52.393377][ T136] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 53.893819][ T136] device hsr_slave_0 left promiscuous mode [ 53.938321][ T136] device hsr_slave_1 left promiscuous mode [ 54.038167][ T136] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 54.039477][ T136] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 54.040937][ T136] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 54.042073][ T136] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 54.043445][ T136] device bridge_slave_1 left promiscuous mode [ 54.044409][ T136] bridge0: port 2(bridge_slave_1) entered disabled state [ 54.078675][ T136] device bridge_slave_0 left promiscuous mode [ 54.079805][ T136] bridge0: port 1(bridge_slave_0) entered disabled state [ 54.238221][ T136] device veth1_macvtap left promiscuous mode [ 54.239296][ T136] device veth0_macvtap left promiscuous mode [ 54.240422][ T136] device veth1_vlan left promiscuous mode [ 54.241468][ T136] device veth0_vlan left promiscuous mode [ 54.343005][ T136] team0 (unregistering): Port device team_slave_1 removed [ 54.347433][ T136] team0 (unregistering): Port device team_slave_0 removed [ 54.355008][ T136] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 54.381589][ T136] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 54.503116][ T136] bond0 (unregistering): Released all slaves Warning: Permanently added '10.128.10.4' (ED25519) to the list of known hosts. 1970/01/01 00:00:56 parsed 1 programs [ 58.129894][ T4346] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k SSFS [ 61.196944][ T4388] chnl_net:caif_netlink_parms(): no params data found [ 61.217021][ T4388] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.218474][ T4388] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.220007][ T4388] device bridge_slave_0 entered promiscuous mode [ 61.222557][ T4388] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.223800][ T4388] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.225266][ T4388] device bridge_slave_1 entered promiscuous mode [ 61.236791][ T4388] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.239529][ T4388] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.247651][ T4388] team0: Port device team_slave_0 added [ 61.249727][ T4388] team0: Port device team_slave_1 added [ 61.257443][ T4388] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 61.258796][ T4388] 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. [ 61.262711][ T4388] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 61.265076][ T4388] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 61.266206][ T4388] 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. [ 61.270354][ T4388] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 61.329291][ T4388] device hsr_slave_0 entered promiscuous mode [ 61.369056][ T4388] device hsr_slave_1 entered promiscuous mode [ 62.098901][ T4388] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 62.123274][ T4388] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 62.161217][ T4388] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 62.199598][ T4388] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 62.236224][ T4388] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.237422][ T4388] bridge0: port 2(bridge_slave_1) entered forwarding state [ 62.238724][ T4388] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.239834][ T4388] bridge0: port 1(bridge_slave_0) entered forwarding state [ 62.260147][ T9] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.261701][ T9] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.284538][ T4388] 8021q: adding VLAN 0 to HW filter on device bond0 [ 62.291263][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 62.292700][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 62.295781][ T4388] 8021q: adding VLAN 0 to HW filter on device team0 [ 62.299645][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 62.301676][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 62.303350][ T337] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.304509][ T337] bridge0: port 1(bridge_slave_0) entered forwarding state [ 62.308995][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 62.310595][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 62.312207][ T337] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.313458][ T337] bridge0: port 2(bridge_slave_1) entered forwarding state [ 62.321297][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 62.323056][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 62.329900][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 62.332078][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 62.333745][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 62.335446][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 62.340030][ T4388] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 62.341684][ T4388] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 62.347007][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 62.349229][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 62.350911][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 62.352870][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 62.354441][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 62.356937][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 62.403634][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 62.404973][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 62.409727][ T4388] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 62.416451][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 62.419886][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 62.434499][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 62.436171][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 62.437781][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 62.440202][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 62.443336][ T4388] device veth0_vlan entered promiscuous mode [ 62.447080][ T4388] device veth1_vlan entered promiscuous mode [ 62.461908][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 62.463708][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 62.465328][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 62.466923][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 62.471299][ T4388] device veth0_macvtap entered promiscuous mode [ 62.473808][ T4388] device veth1_macvtap entered promiscuous mode [ 62.479965][ T4388] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 62.481301][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 62.482947][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 62.484522][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 62.486027][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 62.489057][ T4388] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 62.491309][ T4388] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 62.492672][ T4388] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 62.494096][ T4388] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 62.495434][ T4388] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 62.498592][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 62.500204][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 62.727324][ T337] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 62.729045][ T337] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 62.730961][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 62.739890][ T337] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 62.741113][ T337] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 62.742354][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 1970/01/01 00:01:03 executed programs: 0 [ 63.493474][ T4635] chnl_net:caif_netlink_parms(): no params data found [ 63.516441][ T4635] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.517640][ T4635] bridge0: port 1(bridge_slave_0) entered disabled state [ 63.523896][ T4635] device bridge_slave_0 entered promiscuous mode [ 63.526090][ T4635] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.527255][ T4635] bridge0: port 2(bridge_slave_1) entered disabled state [ 63.529392][ T4635] device bridge_slave_1 entered promiscuous mode [ 63.542183][ T4635] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 63.544829][ T4635] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 63.554903][ T4635] team0: Port device team_slave_0 added [ 63.557134][ T4635] team0: Port device team_slave_1 added [ 63.566334][ T4635] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 63.567442][ T4635] 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. [ 63.571860][ T4635] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 63.574146][ T4635] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 63.575206][ T4635] 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. [ 63.580661][ T4635] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 63.639594][ T4635] device hsr_slave_0 entered promiscuous mode [ 63.659956][ T4635] device hsr_slave_1 entered promiscuous mode [ 63.719546][ T4635] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 63.720885][ T4635] Cannot create hsr debugfs directory [ 63.763167][ T4635] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 65.538177][ T25] Bluetooth: hci0: command 0x0409 tx timeout [ 65.993977][ T4635] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 67.608144][ T4676] Bluetooth: hci0: command 0x041b tx timeout [ 67.772274][ T4635] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 67.812411][ T4635] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 67.962686][ T4635] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 68.009960][ T4635] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 68.082710][ T4635] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 68.143403][ T4635] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 68.205720][ T4635] 8021q: adding VLAN 0 to HW filter on device bond0 [ 68.210367][ T1357] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 68.212063][ T1357] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 68.214745][ T4635] 8021q: adding VLAN 0 to HW filter on device team0 [ 68.217618][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 68.219629][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 68.221131][ T337] bridge0: port 1(bridge_slave_0) entered blocking state [ 68.222167][ T337] bridge0: port 1(bridge_slave_0) entered forwarding state [ 68.224158][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 68.226414][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 68.227935][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 68.230372][ T337] bridge0: port 2(bridge_slave_1) entered blocking state [ 68.231583][ T337] bridge0: port 2(bridge_slave_1) entered forwarding state [ 68.243682][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 68.246701][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 68.250974][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 68.253183][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 68.254880][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 68.257614][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 68.260944][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 68.263892][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 68.265451][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 68.270546][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 68.272222][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 68.274839][ T4635] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 68.317600][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 68.320461][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 68.324283][ T4635] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 68.331120][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 68.332832][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 68.340236][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 68.341808][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 68.343425][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 68.344929][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 68.347242][ T4635] device veth0_vlan entered promiscuous mode [ 68.353041][ T4635] device veth1_vlan entered promiscuous mode [ 68.362637][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 68.364131][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 68.365515][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 68.367081][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 68.370357][ T4635] device veth0_macvtap entered promiscuous mode [ 68.372866][ T4635] device veth1_macvtap entered promiscuous mode [ 68.377893][ T4635] batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 [ 68.380024][ T4635] batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! [ 68.382117][ T4635] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 68.383508][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 68.385091][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 68.386597][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 68.388965][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 68.396079][ T4635] batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 [ 68.397666][ T4635] batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! [ 68.400108][ T4635] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 68.401267][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 68.403227][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 68.406093][ T4635] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 68.407427][ T4635] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 68.409593][ T4635] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 68.410953][ T4635] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 68.436117][ T148] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 68.437562][ T148] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 68.438844][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 68.439788][ T1357] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 68.440248][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 68.442572][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready 1970/01/01 00:01:08 executed programs: 2 [ 68.466304][ T4687] dccp_xmit_packet: Payload too large (65475) for featneg. [ 68.485818][ T4689] dccp_xmit_packet: Payload too large (65475) for featneg. [ 68.493988][ T4689] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.495707][ T4689] CPU: 1 PID: 4689 Comm: syz.0.17 Not tainted syzkaller #0 [ 68.496877][ T4689] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.498305][ T4689] Call trace: [ 68.498840][ T4689] dump_backtrace+0x0/0x458 [ 68.499531][ T4689] show_stack+0x2c/0x3c [ 68.500153][ T4689] __dump_stack+0x30/0x40 [ 68.500824][ T4689] dump_stack_lvl+0xf4/0x15c [ 68.501556][ T4689] dump_stack+0x1c/0x5c [ 68.502228][ T4689] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.503057][ T4689] dccp_xmit_packet+0x298/0x460 [ 68.503788][ T4689] dccp_write_xmit+0x118/0x1d0 [ 68.504523][ T4689] dccp_sendmsg+0x510/0x850 [ 68.505376][ T4689] inet_sendmsg+0x154/0x27c [ 68.506252][ T4689] __sys_sendto+0x30c/0x420 [ 68.506946][ T4689] __arm64_sys_sendto+0xe4/0x104 [ 68.507728][ T4689] invoke_syscall+0x98/0x28c [ 68.508439][ T4689] el0_svc_common+0x13c/0x258 [ 68.509182][ T4689] do_el0_svc+0x5c/0x140 [ 68.509862][ T4689] el0_svc+0x78/0x1d0 [ 68.510492][ T4689] el0t_64_sync_handler+0xcc/0xe4 [ 68.511247][ T4689] el0t_64_sync+0x1a0/0x1a4 [ 68.513831][ T4689] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.515538][ T4689] CPU: 1 PID: 4689 Comm: syz.0.17 Not tainted syzkaller #0 [ 68.516566][ T4689] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.517986][ T4689] Call trace: [ 68.518480][ T4689] dump_backtrace+0x0/0x458 [ 68.519165][ T4689] show_stack+0x2c/0x3c [ 68.519793][ T4689] __dump_stack+0x30/0x40 [ 68.520426][ T4689] dump_stack_lvl+0xf4/0x15c [ 68.521136][ T4689] dump_stack+0x1c/0x5c [ 68.521762][ T4689] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.522607][ T4689] dccp_xmit_packet+0x298/0x460 [ 68.523347][ T4689] dccp_write_xmit+0x118/0x1d0 [ 68.524144][ T4689] dccp_sendmsg+0x510/0x850 [ 68.524824][ T4689] inet_sendmsg+0x154/0x27c [ 68.525500][ T4689] __sys_sendto+0x30c/0x420 [ 68.526204][ T4689] __arm64_sys_sendto+0xe4/0x104 [ 68.527115][ T4689] invoke_syscall+0x98/0x28c [ 68.527819][ T4689] el0_svc_common+0x13c/0x258 [ 68.528557][ T4689] do_el0_svc+0x5c/0x140 [ 68.529195][ T4689] el0_svc+0x78/0x1d0 [ 68.529787][ T4689] el0t_64_sync_handler+0xcc/0xe4 [ 68.530552][ T4689] el0t_64_sync+0x1a0/0x1a4 [ 68.531806][ T4689] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.533516][ T4689] CPU: 1 PID: 4689 Comm: syz.0.17 Not tainted syzkaller #0 [ 68.534572][ T4689] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.536132][ T4689] Call trace: [ 68.536630][ T4689] dump_backtrace+0x0/0x458 [ 68.537298][ T4689] show_stack+0x2c/0x3c [ 68.537889][ T4689] __dump_stack+0x30/0x40 [ 68.538551][ T4689] dump_stack_lvl+0xf4/0x15c [ 68.539287][ T4689] dump_stack+0x1c/0x5c [ 68.539924][ T4689] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.540787][ T4689] dccp_xmit_packet+0x298/0x460 [ 68.541549][ T4689] dccp_write_xmit+0x118/0x1d0 [ 68.542295][ T4689] dccp_sendmsg+0x510/0x850 [ 68.543017][ T4689] inet_sendmsg+0x154/0x27c [ 68.543746][ T4689] __sys_sendto+0x30c/0x420 [ 68.544461][ T4689] __arm64_sys_sendto+0xe4/0x104 [ 68.545215][ T4689] invoke_syscall+0x98/0x28c [ 68.546018][ T4689] el0_svc_common+0x13c/0x258 [ 68.546717][ T4689] do_el0_svc+0x5c/0x140 [ 68.547395][ T4689] el0_svc+0x78/0x1d0 [ 68.548087][ T4689] el0t_64_sync_handler+0xcc/0xe4 [ 68.548879][ T4689] el0t_64_sync+0x1a0/0x1a4 [ 68.549865][ T4689] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.551621][ T4689] CPU: 1 PID: 4689 Comm: syz.0.17 Not tainted syzkaller #0 [ 68.552718][ T4689] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.554199][ T4689] Call trace: [ 68.554687][ T4689] dump_backtrace+0x0/0x458 [ 68.555402][ T4689] show_stack+0x2c/0x3c [ 68.556027][ T4689] __dump_stack+0x30/0x40 [ 68.556742][ T4689] dump_stack_lvl+0xf4/0x15c [ 68.557385][ T4689] dump_stack+0x1c/0x5c [ 68.558010][ T4689] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.558777][ T4689] dccp_xmit_packet+0x298/0x460 [ 68.559533][ T4689] dccp_write_xmit+0x118/0x1d0 [ 68.560271][ T4689] dccp_sendmsg+0x510/0x850 [ 68.561017][ T4689] inet_sendmsg+0x154/0x27c [ 68.561677][ T4689] __sys_sendto+0x30c/0x420 [ 68.562393][ T4689] __arm64_sys_sendto+0xe4/0x104 [ 68.563189][ T4689] invoke_syscall+0x98/0x28c [ 68.563933][ T4689] el0_svc_common+0x13c/0x258 [ 68.564661][ T4689] do_el0_svc+0x5c/0x140 [ 68.565405][ T4689] el0_svc+0x78/0x1d0 [ 68.566066][ T4689] el0t_64_sync_handler+0xcc/0xe4 [ 68.566861][ T4689] el0t_64_sync+0x1a0/0x1a4 [ 68.567871][ T4689] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.570287][ T4689] CPU: 1 PID: 4689 Comm: syz.0.17 Not tainted syzkaller #0 [ 68.571395][ T4689] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.572814][ T4689] Call trace: [ 68.573313][ T4689] dump_backtrace+0x0/0x458 [ 68.573917][ T4689] show_stack+0x2c/0x3c [ 68.574530][ T4689] __dump_stack+0x30/0x40 [ 68.575204][ T4689] dump_stack_lvl+0xf4/0x15c [ 68.575843][ T4689] dump_stack+0x1c/0x5c [ 68.576437][ T4689] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.577236][ T4689] dccp_xmit_packet+0x298/0x460 [ 68.578007][ T4689] dccp_write_xmit+0x118/0x1d0 [ 68.578762][ T4689] dccp_sendmsg+0x510/0x850 [ 68.579410][ T4689] inet_sendmsg+0x154/0x27c [ 68.580047][ T4689] __sys_sendto+0x30c/0x420 [ 68.580733][ T4689] __arm64_sys_sendto+0xe4/0x104 [ 68.581569][ T4689] invoke_syscall+0x98/0x28c [ 68.582323][ T4689] el0_svc_common+0x13c/0x258 [ 68.583063][ T4689] do_el0_svc+0x5c/0x140 [ 68.583722][ T4689] el0_svc+0x78/0x1d0 [ 68.584317][ T4689] el0t_64_sync_handler+0xcc/0xe4 [ 68.585067][ T4689] el0t_64_sync+0x1a0/0x1a4 [ 68.587011][ T4689] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.588821][ T4689] CPU: 1 PID: 4689 Comm: syz.0.17 Not tainted syzkaller #0 [ 68.590015][ T4689] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.591611][ T4689] Call trace: [ 68.592124][ T4689] dump_backtrace+0x0/0x458 [ 68.592816][ T4689] show_stack+0x2c/0x3c [ 68.593504][ T4689] __dump_stack+0x30/0x40 [ 68.594241][ T4689] dump_stack_lvl+0xf4/0x15c [ 68.594905][ T4689] dump_stack+0x1c/0x5c [ 68.595480][ T4689] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.596329][ T4689] dccp_xmit_packet+0x298/0x460 [ 68.597023][ T4689] dccp_write_xmit+0x118/0x1d0 [ 68.597727][ T4689] dccp_sendmsg+0x510/0x850 [ 68.598461][ T4689] inet_sendmsg+0x154/0x27c [ 68.599142][ T4689] __sys_sendto+0x30c/0x420 [ 68.599867][ T4689] __arm64_sys_sendto+0xe4/0x104 [ 68.600657][ T4689] invoke_syscall+0x98/0x28c [ 68.601335][ T4689] el0_svc_common+0x13c/0x258 [ 68.602105][ T4689] do_el0_svc+0x5c/0x140 [ 68.602753][ T4689] el0_svc+0x78/0x1d0 [ 68.603350][ T4689] el0t_64_sync_handler+0xcc/0xe4 [ 68.604081][ T4689] el0t_64_sync+0x1a0/0x1a4 [ 68.605655][ T4689] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.607379][ T4689] CPU: 1 PID: 4689 Comm: syz.0.17 Not tainted syzkaller #0 [ 68.608468][ T4689] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.609989][ T4689] Call trace: [ 68.610599][ T4689] dump_backtrace+0x0/0x458 [ 68.611337][ T4689] show_stack+0x2c/0x3c [ 68.612032][ T4689] __dump_stack+0x30/0x40 [ 68.612706][ T4689] dump_stack_lvl+0xf4/0x15c [ 68.613402][ T4689] dump_stack+0x1c/0x5c [ 68.614066][ T4689] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.614908][ T4689] dccp_xmit_packet+0x298/0x460 [ 68.615719][ T4689] dccp_write_xmit+0x118/0x1d0 [ 68.616461][ T4689] dccp_sendmsg+0x510/0x850 [ 68.617198][ T4689] inet_sendmsg+0x154/0x27c [ 68.617936][ T4689] __sys_sendto+0x30c/0x420 [ 68.618765][ T4689] __arm64_sys_sendto+0xe4/0x104 [ 68.619602][ T4689] invoke_syscall+0x98/0x28c [ 68.620304][ T4689] el0_svc_common+0x13c/0x258 [ 68.620992][ T4689] do_el0_svc+0x5c/0x140 [ 68.621630][ T4689] el0_svc+0x78/0x1d0 [ 68.622261][ T4689] el0t_64_sync_handler+0xcc/0xe4 [ 68.623082][ T4689] el0t_64_sync+0x1a0/0x1a4 [ 68.624387][ T4689] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.626338][ T4689] CPU: 1 PID: 4689 Comm: syz.0.17 Not tainted syzkaller #0 [ 68.627379][ T4689] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.628973][ T4689] Call trace: [ 68.629525][ T4689] dump_backtrace+0x0/0x458 [ 68.630248][ T4689] show_stack+0x2c/0x3c [ 68.630854][ T4689] __dump_stack+0x30/0x40 [ 68.631522][ T4689] dump_stack_lvl+0xf4/0x15c [ 68.632244][ T4689] dump_stack+0x1c/0x5c [ 68.632909][ T4689] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.633743][ T4689] dccp_xmit_packet+0x298/0x460 [ 68.634534][ T4689] dccp_write_xmit+0x118/0x1d0 [ 68.635314][ T4689] dccp_sendmsg+0x510/0x850 [ 68.636064][ T4689] inet_sendmsg+0x154/0x27c [ 68.636831][ T4689] __sys_sendto+0x30c/0x420 [ 68.637488][ T4689] __arm64_sys_sendto+0xe4/0x104 [ 68.638251][ T4689] invoke_syscall+0x98/0x28c [ 68.639039][ T4689] el0_svc_common+0x13c/0x258 [ 68.639891][ T4689] do_el0_svc+0x5c/0x140 [ 68.640582][ T4689] el0_svc+0x78/0x1d0 [ 68.641320][ T4689] el0t_64_sync_handler+0xcc/0xe4 [ 68.642080][ T4689] el0t_64_sync+0x1a0/0x1a4 [ 68.643437][ T4689] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.645160][ T4689] CPU: 1 PID: 4689 Comm: syz.0.17 Not tainted syzkaller #0 [ 68.646240][ T4689] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.647697][ T4689] Call trace: [ 68.648199][ T4689] dump_backtrace+0x0/0x458 [ 68.648935][ T4689] show_stack+0x2c/0x3c [ 68.649553][ T4689] __dump_stack+0x30/0x40 [ 68.650382][ T4689] dump_stack_lvl+0xf4/0x15c [ 68.651112][ T4689] dump_stack+0x1c/0x5c [ 68.651793][ T4689] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.652703][ T4689] dccp_xmit_packet+0x298/0x460 [ 68.653467][ T4689] dccp_write_xmit+0x118/0x1d0 [ 68.654204][ T4689] dccp_sendmsg+0x510/0x850 [ 68.654942][ T4689] inet_sendmsg+0x154/0x27c [ 68.655672][ T4689] __sys_sendto+0x30c/0x420 [ 68.656572][ T4689] __arm64_sys_sendto+0xe4/0x104 [ 68.657587][ T4689] invoke_syscall+0x98/0x28c [ 68.658524][ T4689] el0_svc_common+0x13c/0x258 [ 68.659501][ T4689] do_el0_svc+0x5c/0x140 [ 68.660312][ T4689] el0_svc+0x78/0x1d0 [ 68.661089][ T4689] el0t_64_sync_handler+0xcc/0xe4 [ 68.661915][ T4689] el0t_64_sync+0x1a0/0x1a4 [ 68.662870][ T4689] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.664530][ T4689] CPU: 1 PID: 4689 Comm: syz.0.17 Not tainted syzkaller #0 [ 68.665552][ T4689] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.667052][ T4689] Call trace: [ 68.667552][ T4689] dump_backtrace+0x0/0x458 [ 68.668203][ T4689] show_stack+0x2c/0x3c [ 68.668799][ T4689] __dump_stack+0x30/0x40 [ 68.669497][ T4689] dump_stack_lvl+0xf4/0x15c [ 68.670259][ T4689] dump_stack+0x1c/0x5c [ 68.670920][ T4689] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.671717][ T4689] dccp_xmit_packet+0x298/0x460 [ 68.672437][ T4689] dccp_write_xmit+0x118/0x1d0 [ 68.673143][ T4689] dccp_sendmsg+0x510/0x850 [ 68.673866][ T4689] inet_sendmsg+0x154/0x27c [ 68.674566][ T4689] __sys_sendto+0x30c/0x420 [ 68.675310][ T4689] __arm64_sys_sendto+0xe4/0x104 [ 68.676038][ T4689] invoke_syscall+0x98/0x28c [ 68.676801][ T4689] el0_svc_common+0x13c/0x258 [ 68.677573][ T4689] do_el0_svc+0x5c/0x140 [ 68.678202][ T4689] el0_svc+0x78/0x1d0 [ 68.678839][ T4689] el0t_64_sync_handler+0xcc/0xe4 [ 68.679697][ T4689] el0t_64_sync+0x1a0/0x1a4 [ 68.680887][ T4689] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.682553][ T4689] CPU: 1 PID: 4689 Comm: syz.0.17 Not tainted syzkaller #0 [ 68.683630][ T4689] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.685133][ T4689] Call trace: [ 68.685555][ T4689] dump_backtrace+0x0/0x458 [ 68.686280][ T4689] show_stack+0x2c/0x3c [ 68.686911][ T4689] __dump_stack+0x30/0x40 [ 68.687542][ T4689] dump_stack_lvl+0xf4/0x15c [ 68.688188][ T4689] dump_stack+0x1c/0x5c [ 68.688843][ T4689] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.689752][ T4689] dccp_xmit_packet+0x298/0x460 [ 68.690536][ T4689] dccp_write_xmit+0x118/0x1d0 [ 68.691270][ T4689] dccp_sendmsg+0x510/0x850 [ 68.691990][ T4689] inet_sendmsg+0x154/0x27c [ 68.692802][ T4689] __sys_sendto+0x30c/0x420 [ 68.693564][ T4689] __arm64_sys_sendto+0xe4/0x104 [ 68.694338][ T4689] invoke_syscall+0x98/0x28c [ 68.695077][ T4689] el0_svc_common+0x13c/0x258 [ 68.695861][ T4689] do_el0_svc+0x5c/0x140 [ 68.696506][ T4689] el0_svc+0x78/0x1d0 [ 68.697183][ T4689] el0t_64_sync_handler+0xcc/0xe4 [ 68.697969][ T4689] el0t_64_sync+0x1a0/0x1a4 [ 68.699188][ T4689] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.700855][ T4689] CPU: 1 PID: 4689 Comm: syz.0.17 Not tainted syzkaller #0 [ 68.701976][ T4689] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.703629][ T4689] Call trace: [ 68.704130][ T4689] dump_backtrace+0x0/0x458 [ 68.704799][ T4689] show_stack+0x2c/0x3c [ 68.705429][ T4689] __dump_stack+0x30/0x40 [ 68.706073][ T4689] dump_stack_lvl+0xf4/0x15c [ 68.706920][ T4689] dump_stack+0x1c/0x5c [ 68.707580][ T4689] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.708458][ T4689] dccp_xmit_packet+0x298/0x460 [ 68.709259][ T4689] dccp_write_xmit+0x118/0x1d0 [ 68.710014][ T4689] dccp_sendmsg+0x510/0x850 [ 68.710769][ T4689] inet_sendmsg+0x154/0x27c [ 68.711508][ T4689] __sys_sendto+0x30c/0x420 [ 68.712220][ T4689] __arm64_sys_sendto+0xe4/0x104 [ 68.712988][ T4689] invoke_syscall+0x98/0x28c [ 68.713639][ T4689] el0_svc_common+0x13c/0x258 [ 68.714389][ T4689] do_el0_svc+0x5c/0x140 [ 68.715046][ T4689] el0_svc+0x78/0x1d0 [ 68.715698][ T4689] el0t_64_sync_handler+0xcc/0xe4 [ 68.716528][ T4689] el0t_64_sync+0x1a0/0x1a4 [ 68.717391][ T4689] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.719512][ T4689] CPU: 1 PID: 4689 Comm: syz.0.17 Not tainted syzkaller #0 [ 68.720674][ T4689] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.722276][ T4689] Call trace: [ 68.722773][ T4689] dump_backtrace+0x0/0x458 [ 68.723434][ T4689] show_stack+0x2c/0x3c [ 68.724039][ T4689] __dump_stack+0x30/0x40 [ 68.724688][ T4689] dump_stack_lvl+0xf4/0x15c [ 68.725379][ T4689] dump_stack+0x1c/0x5c [ 68.725993][ T4689] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.726806][ T4689] dccp_xmit_packet+0x298/0x460 [ 68.727551][ T4689] dccp_write_xmit+0x118/0x1d0 [ 68.728227][ T4689] dccp_sendmsg+0x510/0x850 [ 68.728869][ T4689] inet_sendmsg+0x154/0x27c [ 68.729505][ T4689] __sys_sendto+0x30c/0x420 [ 68.730245][ T4689] __arm64_sys_sendto+0xe4/0x104 [ 68.731084][ T4689] invoke_syscall+0x98/0x28c [ 68.731823][ T4689] el0_svc_common+0x13c/0x258 [ 68.732515][ T4689] do_el0_svc+0x5c/0x140 [ 68.733236][ T4689] el0_svc+0x78/0x1d0 [ 68.733918][ T4689] el0t_64_sync_handler+0xcc/0xe4 [ 68.734721][ T4689] el0t_64_sync+0x1a0/0x1a4 [ 68.736034][ T4689] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.737720][ T4689] CPU: 1 PID: 4689 Comm: syz.0.17 Not tainted syzkaller #0 [ 68.738861][ T4689] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.740726][ T4689] Call trace: [ 68.741268][ T4689] dump_backtrace+0x0/0x458 [ 68.741999][ T4689] show_stack+0x2c/0x3c [ 68.742675][ T4689] __dump_stack+0x30/0x40 [ 68.743361][ T4689] dump_stack_lvl+0xf4/0x15c [ 68.744034][ T4689] dump_stack+0x1c/0x5c [ 68.744687][ T4689] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.745548][ T4689] dccp_xmit_packet+0x298/0x460 [ 68.746294][ T4689] dccp_write_xmit+0x118/0x1d0 [ 68.747007][ T4689] dccp_sendmsg+0x510/0x850 [ 68.747640][ T4689] inet_sendmsg+0x154/0x27c [ 68.748459][ T4689] __sys_sendto+0x30c/0x420 [ 68.749168][ T4689] __arm64_sys_sendto+0xe4/0x104 [ 68.749966][ T4689] invoke_syscall+0x98/0x28c [ 68.750699][ T4689] el0_svc_common+0x13c/0x258 [ 68.751443][ T4689] do_el0_svc+0x5c/0x140 [ 68.752143][ T4689] el0_svc+0x78/0x1d0 [ 68.752729][ T4689] el0t_64_sync_handler+0xcc/0xe4 [ 68.753481][ T4689] el0t_64_sync+0x1a0/0x1a4 [ 68.754470][ T4689] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.756185][ T4689] CPU: 1 PID: 4689 Comm: syz.0.17 Not tainted syzkaller #0 [ 68.757403][ T4689] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.759346][ T4689] Call trace: [ 68.759973][ T4689] dump_backtrace+0x0/0x458 [ 68.760702][ T4689] show_stack+0x2c/0x3c [ 68.761388][ T4689] __dump_stack+0x30/0x40 [ 68.762106][ T4689] dump_stack_lvl+0xf4/0x15c [ 68.762876][ T4689] dump_stack+0x1c/0x5c [ 68.763570][ T4689] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.764472][ T4689] dccp_xmit_packet+0x298/0x460 [ 68.765272][ T4689] dccp_write_xmit+0x118/0x1d0 [ 68.766066][ T4689] dccp_sendmsg+0x510/0x850 [ 68.766798][ T4689] inet_sendmsg+0x154/0x27c [ 68.767512][ T4689] __sys_sendto+0x30c/0x420 [ 68.768201][ T4689] __arm64_sys_sendto+0xe4/0x104 [ 68.768964][ T4689] invoke_syscall+0x98/0x28c [ 68.769668][ T4689] el0_svc_common+0x13c/0x258 [ 68.770453][ T4689] do_el0_svc+0x5c/0x140 [ 68.771080][ T4689] el0_svc+0x78/0x1d0 [ 68.771786][ T4689] el0t_64_sync_handler+0xcc/0xe4 [ 68.772592][ T4689] el0t_64_sync+0x1a0/0x1a4 [ 68.773859][ T4689] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.775611][ T4689] CPU: 1 PID: 4689 Comm: syz.0.17 Not tainted syzkaller #0 [ 68.776632][ T4689] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.778059][ T4689] Call trace: [ 68.778609][ T4689] dump_backtrace+0x0/0x458 [ 68.779339][ T4689] show_stack+0x2c/0x3c [ 68.780043][ T4689] __dump_stack+0x30/0x40 [ 68.780742][ T4689] dump_stack_lvl+0xf4/0x15c [ 68.781536][ T4689] dump_stack+0x1c/0x5c [ 68.782146][ T4689] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.783010][ T4689] dccp_xmit_packet+0x298/0x460 [ 68.783779][ T4689] dccp_write_xmit+0x118/0x1d0 [ 68.784526][ T4689] dccp_sendmsg+0x510/0x850 [ 68.785251][ T4689] inet_sendmsg+0x154/0x27c [ 68.786006][ T4689] __sys_sendto+0x30c/0x420 [ 68.786747][ T4689] __arm64_sys_sendto+0xe4/0x104 [ 68.787581][ T4689] invoke_syscall+0x98/0x28c [ 68.788276][ T4689] el0_svc_common+0x13c/0x258 [ 68.789049][ T4689] do_el0_svc+0x5c/0x140 [ 68.789686][ T4689] el0_svc+0x78/0x1d0 [ 68.790303][ T4689] el0t_64_sync_handler+0xcc/0xe4 [ 68.791099][ T4689] el0t_64_sync+0x1a0/0x1a4 [ 68.805433][ T4691] dccp_xmit_packet: Payload too large (65475) for featneg. [ 68.813519][ T4691] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.815254][ T4691] CPU: 0 PID: 4691 Comm: syz.0.18 Not tainted syzkaller #0 [ 68.816369][ T4691] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.817937][ T4691] Call trace: [ 68.818465][ T4691] dump_backtrace+0x0/0x458 [ 68.819212][ T4691] show_stack+0x2c/0x3c [ 68.819958][ T4691] __dump_stack+0x30/0x40 [ 68.820620][ T4691] dump_stack_lvl+0xf4/0x15c [ 68.821363][ T4691] dump_stack+0x1c/0x5c [ 68.821969][ T4691] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.822883][ T4691] dccp_xmit_packet+0x298/0x460 [ 68.823692][ T4691] dccp_write_xmit+0x118/0x1d0 [ 68.824413][ T4691] dccp_sendmsg+0x510/0x850 [ 68.825122][ T4691] inet_sendmsg+0x154/0x27c [ 68.825834][ T4691] __sys_sendto+0x30c/0x420 [ 68.826560][ T4691] __arm64_sys_sendto+0xe4/0x104 [ 68.827343][ T4691] invoke_syscall+0x98/0x28c [ 68.828056][ T4691] el0_svc_common+0x13c/0x258 [ 68.828865][ T4691] do_el0_svc+0x5c/0x140 [ 68.829566][ T4691] el0_svc+0x78/0x1d0 [ 68.830228][ T4691] el0t_64_sync_handler+0xcc/0xe4 [ 68.831025][ T4691] el0t_64_sync+0x1a0/0x1a4 [ 68.832531][ T4691] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.834298][ T4691] CPU: 0 PID: 4691 Comm: syz.0.18 Not tainted syzkaller #0 [ 68.835413][ T4691] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.837049][ T4691] Call trace: [ 68.837633][ T4691] dump_backtrace+0x0/0x458 [ 68.838420][ T4691] show_stack+0x2c/0x3c [ 68.839141][ T4691] __dump_stack+0x30/0x40 [ 68.839887][ T4691] dump_stack_lvl+0xf4/0x15c [ 68.840677][ T4691] dump_stack+0x1c/0x5c [ 68.841320][ T4691] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.842214][ T4691] dccp_xmit_packet+0x298/0x460 [ 68.842959][ T4691] dccp_write_xmit+0x118/0x1d0 [ 68.843673][ T4691] dccp_sendmsg+0x510/0x850 [ 68.844579][ T4691] inet_sendmsg+0x154/0x27c [ 68.845493][ T4691] __sys_sendto+0x30c/0x420 [ 68.846278][ T4691] __arm64_sys_sendto+0xe4/0x104 [ 68.847172][ T4691] invoke_syscall+0x98/0x28c [ 68.847935][ T4691] el0_svc_common+0x13c/0x258 [ 68.848676][ T4691] do_el0_svc+0x5c/0x140 [ 68.849358][ T4691] el0_svc+0x78/0x1d0 [ 68.850031][ T4691] el0t_64_sync_handler+0xcc/0xe4 [ 68.850863][ T4691] el0t_64_sync+0x1a0/0x1a4 [ 68.852142][ T4691] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.853757][ T4691] CPU: 0 PID: 4691 Comm: syz.0.18 Not tainted syzkaller #0 [ 68.854870][ T4691] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.856397][ T4691] Call trace: [ 68.856919][ T4691] dump_backtrace+0x0/0x458 [ 68.857626][ T4691] show_stack+0x2c/0x3c [ 68.858324][ T4691] __dump_stack+0x30/0x40 [ 68.859040][ T4691] dump_stack_lvl+0xf4/0x15c [ 68.859780][ T4691] dump_stack+0x1c/0x5c [ 68.860454][ T4691] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.861414][ T4691] dccp_xmit_packet+0x298/0x460 [ 68.862267][ T4691] dccp_write_xmit+0x118/0x1d0 [ 68.863115][ T4691] dccp_sendmsg+0x510/0x850 [ 68.863843][ T4691] inet_sendmsg+0x154/0x27c [ 68.864609][ T4691] __sys_sendto+0x30c/0x420 [ 68.865434][ T4691] __arm64_sys_sendto+0xe4/0x104 [ 68.866286][ T4691] invoke_syscall+0x98/0x28c [ 68.867139][ T4691] el0_svc_common+0x13c/0x258 [ 68.867965][ T4691] do_el0_svc+0x5c/0x140 [ 68.868670][ T4691] el0_svc+0x78/0x1d0 [ 68.869368][ T4691] el0t_64_sync_handler+0xcc/0xe4 [ 68.870214][ T4691] el0t_64_sync+0x1a0/0x1a4 [ 68.871749][ T4691] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.873364][ T4691] CPU: 0 PID: 4691 Comm: syz.0.18 Not tainted syzkaller #0 [ 68.874445][ T4691] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.876174][ T4691] Call trace: [ 68.876665][ T4691] dump_backtrace+0x0/0x458 [ 68.877551][ T4691] show_stack+0x2c/0x3c [ 68.878271][ T4691] __dump_stack+0x30/0x40 [ 68.878966][ T4691] dump_stack_lvl+0xf4/0x15c [ 68.879680][ T4691] dump_stack+0x1c/0x5c [ 68.880369][ T4691] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.881287][ T4691] dccp_xmit_packet+0x298/0x460 [ 68.882108][ T4691] dccp_write_xmit+0x118/0x1d0 [ 68.882886][ T4691] dccp_sendmsg+0x510/0x850 [ 68.883728][ T4691] inet_sendmsg+0x154/0x27c [ 68.884488][ T4691] __sys_sendto+0x30c/0x420 [ 68.885248][ T4691] __arm64_sys_sendto+0xe4/0x104 [ 68.886072][ T4691] invoke_syscall+0x98/0x28c [ 68.886844][ T4691] el0_svc_common+0x13c/0x258 [ 68.887582][ T4691] do_el0_svc+0x5c/0x140 [ 68.888326][ T4691] el0_svc+0x78/0x1d0 [ 68.888992][ T4691] el0t_64_sync_handler+0xcc/0xe4 [ 68.889895][ T4691] el0t_64_sync+0x1a0/0x1a4 [ 68.890955][ T4691] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.892600][ T4691] CPU: 0 PID: 4691 Comm: syz.0.18 Not tainted syzkaller #0 [ 68.893686][ T4691] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.895258][ T4691] Call trace: [ 68.895731][ T4691] dump_backtrace+0x0/0x458 [ 68.896388][ T4691] show_stack+0x2c/0x3c [ 68.897022][ T4691] __dump_stack+0x30/0x40 [ 68.897712][ T4691] dump_stack_lvl+0xf4/0x15c [ 68.898438][ T4691] dump_stack+0x1c/0x5c [ 68.899075][ T4691] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.899943][ T4691] dccp_xmit_packet+0x298/0x460 [ 68.900728][ T4691] dccp_write_xmit+0x118/0x1d0 [ 68.901501][ T4691] dccp_sendmsg+0x510/0x850 [ 68.902282][ T4691] inet_sendmsg+0x154/0x27c [ 68.903007][ T4691] __sys_sendto+0x30c/0x420 [ 68.903680][ T4691] __arm64_sys_sendto+0xe4/0x104 [ 68.904482][ T4691] invoke_syscall+0x98/0x28c [ 68.905245][ T4691] el0_svc_common+0x13c/0x258 [ 68.905966][ T4691] do_el0_svc+0x5c/0x140 [ 68.906678][ T4691] el0_svc+0x78/0x1d0 [ 68.907388][ T4691] el0t_64_sync_handler+0xcc/0xe4 [ 68.908214][ T4691] el0t_64_sync+0x1a0/0x1a4 [ 68.909221][ T4691] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.910962][ T4691] CPU: 0 PID: 4691 Comm: syz.0.18 Not tainted syzkaller #0 [ 68.912115][ T4691] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.913668][ T4691] Call trace: [ 68.914161][ T4691] dump_backtrace+0x0/0x458 [ 68.914867][ T4691] show_stack+0x2c/0x3c [ 68.915509][ T4691] __dump_stack+0x30/0x40 [ 68.916204][ T4691] dump_stack_lvl+0xf4/0x15c [ 68.916810][ T4691] dump_stack+0x1c/0x5c [ 68.917444][ T4691] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.918227][ T4691] dccp_xmit_packet+0x298/0x460 [ 68.919052][ T4691] dccp_write_xmit+0x118/0x1d0 [ 68.919868][ T4691] dccp_sendmsg+0x510/0x850 [ 68.920558][ T4691] inet_sendmsg+0x154/0x27c [ 68.921305][ T4691] __sys_sendto+0x30c/0x420 [ 68.922037][ T4691] __arm64_sys_sendto+0xe4/0x104 [ 68.922868][ T4691] invoke_syscall+0x98/0x28c [ 68.923645][ T4691] el0_svc_common+0x13c/0x258 [ 68.924457][ T4691] do_el0_svc+0x5c/0x140 [ 68.925176][ T4691] el0_svc+0x78/0x1d0 [ 68.925843][ T4691] el0t_64_sync_handler+0xcc/0xe4 [ 68.926651][ T4691] el0t_64_sync+0x1a0/0x1a4 [ 68.927683][ T4691] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.929674][ T4691] CPU: 0 PID: 4691 Comm: syz.0.18 Not tainted syzkaller #0 [ 68.930753][ T4691] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.932318][ T4691] Call trace: [ 68.932865][ T4691] dump_backtrace+0x0/0x458 [ 68.933521][ T4691] show_stack+0x2c/0x3c [ 68.934232][ T4691] __dump_stack+0x30/0x40 [ 68.934899][ T4691] dump_stack_lvl+0xf4/0x15c [ 68.935617][ T4691] dump_stack+0x1c/0x5c [ 68.936287][ T4691] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.937185][ T4691] dccp_xmit_packet+0x298/0x460 [ 68.937928][ T4691] dccp_write_xmit+0x118/0x1d0 [ 68.938679][ T4691] dccp_sendmsg+0x510/0x850 [ 68.939419][ T4691] inet_sendmsg+0x154/0x27c [ 68.940206][ T4691] __sys_sendto+0x30c/0x420 [ 68.940941][ T4691] __arm64_sys_sendto+0xe4/0x104 [ 68.941702][ T4691] invoke_syscall+0x98/0x28c [ 68.942483][ T4691] el0_svc_common+0x13c/0x258 [ 68.943224][ T4691] do_el0_svc+0x5c/0x140 [ 68.943866][ T4691] el0_svc+0x78/0x1d0 [ 68.944497][ T4691] el0t_64_sync_handler+0xcc/0xe4 [ 68.945266][ T4691] el0t_64_sync+0x1a0/0x1a4 [ 68.947160][ T4691] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.949055][ T4691] CPU: 0 PID: 4691 Comm: syz.0.18 Not tainted syzkaller #0 [ 68.950206][ T4691] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.951767][ T4691] Call trace: [ 68.952272][ T4691] dump_backtrace+0x0/0x458 [ 68.952997][ T4691] show_stack+0x2c/0x3c [ 68.953596][ T4691] __dump_stack+0x30/0x40 [ 68.954254][ T4691] dump_stack_lvl+0xf4/0x15c [ 68.954921][ T4691] dump_stack+0x1c/0x5c [ 68.955602][ T4691] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.956462][ T4691] dccp_xmit_packet+0x298/0x460 [ 68.957245][ T4691] dccp_write_xmit+0x118/0x1d0 [ 68.957891][ T4691] dccp_sendmsg+0x510/0x850 [ 68.958626][ T4691] inet_sendmsg+0x154/0x27c [ 68.959300][ T4691] __sys_sendto+0x30c/0x420 [ 68.959998][ T4691] __arm64_sys_sendto+0xe4/0x104 [ 68.960779][ T4691] invoke_syscall+0x98/0x28c [ 68.961494][ T4691] el0_svc_common+0x13c/0x258 [ 68.962258][ T4691] do_el0_svc+0x5c/0x140 [ 68.962961][ T4691] el0_svc+0x78/0x1d0 [ 68.963583][ T4691] el0t_64_sync_handler+0xcc/0xe4 [ 68.964327][ T4691] el0t_64_sync+0x1a0/0x1a4 [ 68.965370][ T4691] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.966983][ T4691] CPU: 0 PID: 4691 Comm: syz.0.18 Not tainted syzkaller #0 [ 68.968103][ T4691] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.969686][ T4691] Call trace: [ 68.970161][ T4691] dump_backtrace+0x0/0x458 [ 68.970934][ T4691] show_stack+0x2c/0x3c [ 68.971622][ T4691] __dump_stack+0x30/0x40 [ 68.972308][ T4691] dump_stack_lvl+0xf4/0x15c [ 68.973081][ T4691] dump_stack+0x1c/0x5c [ 68.973761][ T4691] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.974644][ T4691] dccp_xmit_packet+0x298/0x460 [ 68.975458][ T4691] dccp_write_xmit+0x118/0x1d0 [ 68.976215][ T4691] dccp_sendmsg+0x510/0x850 [ 68.976920][ T4691] inet_sendmsg+0x154/0x27c [ 68.977672][ T4691] __sys_sendto+0x30c/0x420 [ 68.978429][ T4691] __arm64_sys_sendto+0xe4/0x104 [ 68.979248][ T4691] invoke_syscall+0x98/0x28c [ 68.979998][ T4691] el0_svc_common+0x13c/0x258 [ 68.980747][ T4691] do_el0_svc+0x5c/0x140 [ 68.981450][ T4691] el0_svc+0x78/0x1d0 [ 68.982120][ T4691] el0t_64_sync_handler+0xcc/0xe4 [ 68.982941][ T4691] el0t_64_sync+0x1a0/0x1a4 [ 68.984272][ T4691] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 68.985978][ T4691] CPU: 0 PID: 4691 Comm: syz.0.18 Not tainted syzkaller #0 [ 68.987024][ T4691] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.988487][ T4691] Call trace: [ 68.989017][ T4691] dump_backtrace+0x0/0x458 [ 68.989747][ T4691] show_stack+0x2c/0x3c [ 68.990432][ T4691] __dump_stack+0x30/0x40 [ 68.991190][ T4691] dump_stack_lvl+0xf4/0x15c [ 68.991942][ T4691] dump_stack+0x1c/0x5c [ 68.992570][ T4691] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 68.993436][ T4691] dccp_xmit_packet+0x298/0x460 [ 68.994266][ T4691] dccp_write_xmit+0x118/0x1d0 [ 68.995030][ T4691] dccp_sendmsg+0x510/0x850 [ 68.995728][ T4691] inet_sendmsg+0x154/0x27c [ 68.996407][ T4691] __sys_sendto+0x30c/0x420 [ 68.997100][ T4691] __arm64_sys_sendto+0xe4/0x104 [ 68.997853][ T4691] invoke_syscall+0x98/0x28c [ 68.998580][ T4691] el0_svc_common+0x13c/0x258 [ 68.999323][ T4691] do_el0_svc+0x5c/0x140 [ 69.000018][ T4691] el0_svc+0x78/0x1d0 [ 69.000654][ T4691] el0t_64_sync_handler+0xcc/0xe4 [ 69.001425][ T4691] el0t_64_sync+0x1a0/0x1a4 [ 69.002351][ T4691] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.004015][ T4691] CPU: 0 PID: 4691 Comm: syz.0.18 Not tainted syzkaller #0 [ 69.005091][ T4691] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.006484][ T4691] Call trace: [ 69.007009][ T4691] dump_backtrace+0x0/0x458 [ 69.007711][ T4691] show_stack+0x2c/0x3c [ 69.008440][ T4691] __dump_stack+0x30/0x40 [ 69.009114][ T4691] dump_stack_lvl+0xf4/0x15c [ 69.009865][ T4691] dump_stack+0x1c/0x5c [ 69.010544][ T4691] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.011440][ T4691] dccp_xmit_packet+0x298/0x460 [ 69.012141][ T4691] dccp_write_xmit+0x118/0x1d0 [ 69.012886][ T4691] dccp_sendmsg+0x510/0x850 [ 69.013602][ T4691] inet_sendmsg+0x154/0x27c [ 69.014291][ T4691] __sys_sendto+0x30c/0x420 [ 69.014992][ T4691] __arm64_sys_sendto+0xe4/0x104 [ 69.015815][ T4691] invoke_syscall+0x98/0x28c [ 69.016487][ T4691] el0_svc_common+0x13c/0x258 [ 69.017213][ T4691] do_el0_svc+0x5c/0x140 [ 69.017926][ T4691] el0_svc+0x78/0x1d0 [ 69.018543][ T4691] el0t_64_sync_handler+0xcc/0xe4 [ 69.019409][ T4691] el0t_64_sync+0x1a0/0x1a4 [ 69.020768][ T4691] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.022431][ T4691] CPU: 0 PID: 4691 Comm: syz.0.18 Not tainted syzkaller #0 [ 69.023526][ T4691] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.024925][ T4691] Call trace: [ 69.025440][ T4691] dump_backtrace+0x0/0x458 [ 69.026085][ T4691] show_stack+0x2c/0x3c [ 69.026681][ T4691] __dump_stack+0x30/0x40 [ 69.027295][ T4691] dump_stack_lvl+0xf4/0x15c [ 69.027963][ T4691] dump_stack+0x1c/0x5c [ 69.028665][ T4691] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.029589][ T4691] dccp_xmit_packet+0x298/0x460 [ 69.030390][ T4691] dccp_write_xmit+0x118/0x1d0 [ 69.031218][ T4691] dccp_sendmsg+0x510/0x850 [ 69.031981][ T4691] inet_sendmsg+0x154/0x27c [ 69.032733][ T4691] __sys_sendto+0x30c/0x420 [ 69.033480][ T4691] __arm64_sys_sendto+0xe4/0x104 [ 69.034331][ T4691] invoke_syscall+0x98/0x28c [ 69.035063][ T4691] el0_svc_common+0x13c/0x258 [ 69.035883][ T4691] do_el0_svc+0x5c/0x140 [ 69.036609][ T4691] el0_svc+0x78/0x1d0 [ 69.037295][ T4691] el0t_64_sync_handler+0xcc/0xe4 [ 69.038151][ T4691] el0t_64_sync+0x1a0/0x1a4 [ 69.039279][ T4691] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.040923][ T4691] CPU: 0 PID: 4691 Comm: syz.0.18 Not tainted syzkaller #0 [ 69.041992][ T4691] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.043537][ T4691] Call trace: [ 69.044058][ T4691] dump_backtrace+0x0/0x458 [ 69.044742][ T4691] show_stack+0x2c/0x3c [ 69.045418][ T4691] __dump_stack+0x30/0x40 [ 69.046054][ T4691] dump_stack_lvl+0xf4/0x15c [ 69.046761][ T4691] dump_stack+0x1c/0x5c [ 69.047435][ T4691] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.048309][ T4691] dccp_xmit_packet+0x298/0x460 [ 69.049098][ T4691] dccp_write_xmit+0x118/0x1d0 [ 69.049909][ T4691] dccp_sendmsg+0x510/0x850 [ 69.050641][ T4691] inet_sendmsg+0x154/0x27c [ 69.051413][ T4691] __sys_sendto+0x30c/0x420 [ 69.052182][ T4691] __arm64_sys_sendto+0xe4/0x104 [ 69.052985][ T4691] invoke_syscall+0x98/0x28c [ 69.053659][ T4691] el0_svc_common+0x13c/0x258 [ 69.054342][ T4691] do_el0_svc+0x5c/0x140 [ 69.054990][ T4691] el0_svc+0x78/0x1d0 [ 69.055661][ T4691] el0t_64_sync_handler+0xcc/0xe4 [ 69.056459][ T4691] el0t_64_sync+0x1a0/0x1a4 [ 69.058833][ T4691] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.060392][ T4691] CPU: 0 PID: 4691 Comm: syz.0.18 Not tainted syzkaller #0 [ 69.061412][ T4691] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.063020][ T4691] Call trace: [ 69.063531][ T4691] dump_backtrace+0x0/0x458 [ 69.064185][ T4691] show_stack+0x2c/0x3c [ 69.064832][ T4691] __dump_stack+0x30/0x40 [ 69.065505][ T4691] dump_stack_lvl+0xf4/0x15c [ 69.066206][ T4691] dump_stack+0x1c/0x5c [ 69.066795][ T4691] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.067639][ T4691] dccp_xmit_packet+0x298/0x460 [ 69.068401][ T4691] dccp_write_xmit+0x118/0x1d0 [ 69.069233][ T4691] dccp_sendmsg+0x510/0x850 [ 69.070034][ T4691] inet_sendmsg+0x154/0x27c [ 69.070793][ T4691] __sys_sendto+0x30c/0x420 [ 69.071535][ T4691] __arm64_sys_sendto+0xe4/0x104 [ 69.072375][ T4691] invoke_syscall+0x98/0x28c [ 69.073098][ T4691] el0_svc_common+0x13c/0x258 [ 69.073840][ T4691] do_el0_svc+0x5c/0x140 [ 69.074597][ T4691] el0_svc+0x78/0x1d0 [ 69.075286][ T4691] el0t_64_sync_handler+0xcc/0xe4 [ 69.076156][ T4691] el0t_64_sync+0x1a0/0x1a4 [ 69.088372][ T4693] dccp_xmit_packet: Payload too large (65475) for featneg. [ 69.095580][ T4693] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.097313][ T4693] CPU: 0 PID: 4693 Comm: syz.0.19 Not tainted syzkaller #0 [ 69.098562][ T4693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.100309][ T4693] Call trace: [ 69.100853][ T4693] dump_backtrace+0x0/0x458 [ 69.101603][ T4693] show_stack+0x2c/0x3c [ 69.102279][ T4693] __dump_stack+0x30/0x40 [ 69.102926][ T4693] dump_stack_lvl+0xf4/0x15c [ 69.103720][ T4693] dump_stack+0x1c/0x5c [ 69.104396][ T4693] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.105235][ T4693] dccp_xmit_packet+0x298/0x460 [ 69.105999][ T4693] dccp_write_xmit+0x118/0x1d0 [ 69.106774][ T4693] dccp_sendmsg+0x510/0x850 [ 69.107547][ T4693] inet_sendmsg+0x154/0x27c [ 69.108323][ T4693] __sys_sendto+0x30c/0x420 [ 69.109119][ T4693] __arm64_sys_sendto+0xe4/0x104 [ 69.109903][ T4693] invoke_syscall+0x98/0x28c [ 69.110679][ T4693] el0_svc_common+0x13c/0x258 [ 69.111472][ T4693] do_el0_svc+0x5c/0x140 [ 69.112211][ T4693] el0_svc+0x78/0x1d0 [ 69.112929][ T4693] el0t_64_sync_handler+0xcc/0xe4 [ 69.113742][ T4693] el0t_64_sync+0x1a0/0x1a4 [ 69.115985][ T4693] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.117725][ T4693] CPU: 1 PID: 4693 Comm: syz.0.19 Not tainted syzkaller #0 [ 69.118848][ T4693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.120678][ T4693] Call trace: [ 69.121232][ T4693] dump_backtrace+0x0/0x458 [ 69.121942][ T4693] show_stack+0x2c/0x3c [ 69.122627][ T4693] __dump_stack+0x30/0x40 [ 69.123292][ T4693] dump_stack_lvl+0xf4/0x15c [ 69.124011][ T4693] dump_stack+0x1c/0x5c [ 69.124624][ T4693] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.125566][ T4693] dccp_xmit_packet+0x298/0x460 [ 69.126384][ T4693] dccp_write_xmit+0x118/0x1d0 [ 69.127210][ T4693] dccp_sendmsg+0x510/0x850 [ 69.127905][ T4693] inet_sendmsg+0x154/0x27c [ 69.128610][ T4693] __sys_sendto+0x30c/0x420 [ 69.129369][ T4693] __arm64_sys_sendto+0xe4/0x104 [ 69.130189][ T4693] invoke_syscall+0x98/0x28c [ 69.130888][ T4693] el0_svc_common+0x13c/0x258 [ 69.131625][ T4693] do_el0_svc+0x5c/0x140 [ 69.132296][ T4693] el0_svc+0x78/0x1d0 [ 69.132918][ T4693] el0t_64_sync_handler+0xcc/0xe4 [ 69.133807][ T4693] el0t_64_sync+0x1a0/0x1a4 [ 69.139321][ T4693] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.141241][ T4693] CPU: 1 PID: 4693 Comm: syz.0.19 Not tainted syzkaller #0 [ 69.142280][ T4693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.143827][ T4693] Call trace: [ 69.144339][ T4693] dump_backtrace+0x0/0x458 [ 69.145065][ T4693] show_stack+0x2c/0x3c [ 69.145679][ T4693] __dump_stack+0x30/0x40 [ 69.146388][ T4693] dump_stack_lvl+0xf4/0x15c [ 69.147076][ T4693] dump_stack+0x1c/0x5c [ 69.147728][ T4693] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.148660][ T4693] dccp_xmit_packet+0x298/0x460 [ 69.149473][ T4693] dccp_write_xmit+0x118/0x1d0 [ 69.150277][ T4693] dccp_sendmsg+0x510/0x850 [ 69.151011][ T4693] inet_sendmsg+0x154/0x27c [ 69.151728][ T4693] __sys_sendto+0x30c/0x420 [ 69.152616][ T4693] __arm64_sys_sendto+0xe4/0x104 [ 69.153578][ T4693] invoke_syscall+0x98/0x28c [ 69.154483][ T4693] el0_svc_common+0x13c/0x258 [ 69.155324][ T4693] do_el0_svc+0x5c/0x140 [ 69.156001][ T4693] el0_svc+0x78/0x1d0 [ 69.156638][ T4693] el0t_64_sync_handler+0xcc/0xe4 [ 69.157510][ T4693] el0t_64_sync+0x1a0/0x1a4 [ 69.158655][ T4693] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.160666][ T4693] CPU: 1 PID: 4693 Comm: syz.0.19 Not tainted syzkaller #0 [ 69.161732][ T4693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.163304][ T4693] Call trace: [ 69.163827][ T4693] dump_backtrace+0x0/0x458 [ 69.164587][ T4693] show_stack+0x2c/0x3c [ 69.165332][ T4693] __dump_stack+0x30/0x40 [ 69.166119][ T4693] dump_stack_lvl+0xf4/0x15c [ 69.166903][ T4693] dump_stack+0x1c/0x5c [ 69.167583][ T4693] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.168542][ T4693] dccp_xmit_packet+0x298/0x460 [ 69.169355][ T4693] dccp_write_xmit+0x118/0x1d0 [ 69.170211][ T4693] dccp_sendmsg+0x510/0x850 [ 69.170899][ T4693] inet_sendmsg+0x154/0x27c [ 69.171571][ T4693] __sys_sendto+0x30c/0x420 [ 69.172282][ T4693] __arm64_sys_sendto+0xe4/0x104 [ 69.173032][ T4693] invoke_syscall+0x98/0x28c [ 69.173708][ T4693] el0_svc_common+0x13c/0x258 [ 69.174468][ T4693] do_el0_svc+0x5c/0x140 [ 69.175141][ T4693] el0_svc+0x78/0x1d0 [ 69.175757][ T4693] el0t_64_sync_handler+0xcc/0xe4 [ 69.176508][ T4693] el0t_64_sync+0x1a0/0x1a4 [ 69.177530][ T4693] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.179876][ T4693] CPU: 1 PID: 4693 Comm: syz.0.19 Not tainted syzkaller #0 [ 69.181063][ T4693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.182541][ T4693] Call trace: [ 69.183029][ T4693] dump_backtrace+0x0/0x458 [ 69.183678][ T4693] show_stack+0x2c/0x3c [ 69.184279][ T4693] __dump_stack+0x30/0x40 [ 69.184945][ T4693] dump_stack_lvl+0xf4/0x15c [ 69.185577][ T4693] dump_stack+0x1c/0x5c [ 69.186187][ T4693] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.186952][ T4693] dccp_xmit_packet+0x298/0x460 [ 69.187614][ T4693] dccp_write_xmit+0x118/0x1d0 [ 69.188365][ T4693] dccp_sendmsg+0x510/0x850 [ 69.189123][ T4693] inet_sendmsg+0x154/0x27c [ 69.189819][ T4693] __sys_sendto+0x30c/0x420 [ 69.190548][ T4693] __arm64_sys_sendto+0xe4/0x104 [ 69.191314][ T4693] invoke_syscall+0x98/0x28c [ 69.192150][ T4693] el0_svc_common+0x13c/0x258 [ 69.192848][ T4693] do_el0_svc+0x5c/0x140 [ 69.193516][ T4693] el0_svc+0x78/0x1d0 [ 69.194131][ T4693] el0t_64_sync_handler+0xcc/0xe4 [ 69.194893][ T4693] el0t_64_sync+0x1a0/0x1a4 [ 69.195897][ T4693] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.197654][ T4693] CPU: 1 PID: 4693 Comm: syz.0.19 Not tainted syzkaller #0 [ 69.198768][ T4693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.200310][ T4693] Call trace: [ 69.200807][ T4693] dump_backtrace+0x0/0x458 [ 69.201541][ T4693] show_stack+0x2c/0x3c [ 69.202216][ T4693] __dump_stack+0x30/0x40 [ 69.202921][ T4693] dump_stack_lvl+0xf4/0x15c [ 69.203715][ T4693] dump_stack+0x1c/0x5c [ 69.204416][ T4693] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.205245][ T4693] dccp_xmit_packet+0x298/0x460 [ 69.206002][ T4693] dccp_write_xmit+0x118/0x1d0 [ 69.206777][ T4693] dccp_sendmsg+0x510/0x850 [ 69.207490][ T4693] inet_sendmsg+0x154/0x27c [ 69.208201][ T4693] __sys_sendto+0x30c/0x420 [ 69.208974][ T4693] __arm64_sys_sendto+0xe4/0x104 [ 69.209724][ T4693] invoke_syscall+0x98/0x28c [ 69.210432][ T4693] el0_svc_common+0x13c/0x258 [ 69.211189][ T4693] do_el0_svc+0x5c/0x140 [ 69.211857][ T4693] el0_svc+0x78/0x1d0 [ 69.212509][ T4693] el0t_64_sync_handler+0xcc/0xe4 [ 69.213332][ T4693] el0t_64_sync+0x1a0/0x1a4 [ 69.214701][ T4693] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.216388][ T4693] CPU: 1 PID: 4693 Comm: syz.0.19 Not tainted syzkaller #0 [ 69.217473][ T4693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.219007][ T4693] Call trace: [ 69.219488][ T4693] dump_backtrace+0x0/0x458 [ 69.220185][ T4693] show_stack+0x2c/0x3c [ 69.220843][ T4693] __dump_stack+0x30/0x40 [ 69.221525][ T4693] dump_stack_lvl+0xf4/0x15c [ 69.222279][ T4693] dump_stack+0x1c/0x5c [ 69.222992][ T4693] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.223845][ T4693] dccp_xmit_packet+0x298/0x460 [ 69.224602][ T4693] dccp_write_xmit+0x118/0x1d0 [ 69.225386][ T4693] dccp_sendmsg+0x510/0x850 [ 69.226135][ T4693] inet_sendmsg+0x154/0x27c [ 69.226825][ T4693] __sys_sendto+0x30c/0x420 [ 69.227517][ T4693] __arm64_sys_sendto+0xe4/0x104 [ 69.228348][ T4693] invoke_syscall+0x98/0x28c [ 69.229154][ T4693] el0_svc_common+0x13c/0x258 [ 69.229890][ T4693] do_el0_svc+0x5c/0x140 [ 69.230561][ T4693] el0_svc+0x78/0x1d0 [ 69.231255][ T4693] el0t_64_sync_handler+0xcc/0xe4 [ 69.232010][ T4693] el0t_64_sync+0x1a0/0x1a4 [ 69.233055][ T4693] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.234745][ T4693] CPU: 1 PID: 4693 Comm: syz.0.19 Not tainted syzkaller #0 [ 69.235794][ T4693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.237292][ T4693] Call trace: [ 69.237785][ T4693] dump_backtrace+0x0/0x458 [ 69.238580][ T4693] show_stack+0x2c/0x3c [ 69.239258][ T4693] __dump_stack+0x30/0x40 [ 69.239936][ T4693] dump_stack_lvl+0xf4/0x15c [ 69.240745][ T4693] dump_stack+0x1c/0x5c [ 69.241411][ T4693] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.242345][ T4693] dccp_xmit_packet+0x298/0x460 [ 69.243152][ T4693] dccp_write_xmit+0x118/0x1d0 [ 69.243904][ T4693] dccp_sendmsg+0x510/0x850 [ 69.244620][ T4693] inet_sendmsg+0x154/0x27c [ 69.245334][ T4693] __sys_sendto+0x30c/0x420 [ 69.246062][ T4693] __arm64_sys_sendto+0xe4/0x104 [ 69.246844][ T4693] invoke_syscall+0x98/0x28c [ 69.247555][ T4693] el0_svc_common+0x13c/0x258 [ 69.248322][ T4693] do_el0_svc+0x5c/0x140 [ 69.249008][ T4693] el0_svc+0x78/0x1d0 [ 69.249645][ T4693] el0t_64_sync_handler+0xcc/0xe4 [ 69.250387][ T4693] el0t_64_sync+0x1a0/0x1a4 [ 69.251536][ T4693] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.253306][ T4693] CPU: 1 PID: 4693 Comm: syz.0.19 Not tainted syzkaller #0 [ 69.254350][ T4693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.255756][ T4693] Call trace: [ 69.256273][ T4693] dump_backtrace+0x0/0x458 [ 69.256943][ T4693] show_stack+0x2c/0x3c [ 69.257532][ T4693] __dump_stack+0x30/0x40 [ 69.258235][ T4693] dump_stack_lvl+0xf4/0x15c [ 69.258950][ T4693] dump_stack+0x1c/0x5c [ 69.259571][ T4693] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.260389][ T4693] dccp_xmit_packet+0x298/0x460 [ 69.261160][ T4693] dccp_write_xmit+0x118/0x1d0 [ 69.261908][ T4693] dccp_sendmsg+0x510/0x850 [ 69.262699][ T4693] inet_sendmsg+0x154/0x27c [ 69.263415][ T4693] __sys_sendto+0x30c/0x420 [ 69.264151][ T4693] __arm64_sys_sendto+0xe4/0x104 [ 69.264932][ T4693] invoke_syscall+0x98/0x28c [ 69.265632][ T4693] el0_svc_common+0x13c/0x258 [ 69.266361][ T4693] do_el0_svc+0x5c/0x140 [ 69.267073][ T4693] el0_svc+0x78/0x1d0 [ 69.267771][ T4693] el0t_64_sync_handler+0xcc/0xe4 [ 69.268532][ T4693] el0t_64_sync+0x1a0/0x1a4 [ 69.269499][ T4693] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.271164][ T4693] CPU: 1 PID: 4693 Comm: syz.0.19 Not tainted syzkaller #0 [ 69.272275][ T4693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.273719][ T4693] Call trace: [ 69.274244][ T4693] dump_backtrace+0x0/0x458 [ 69.274892][ T4693] show_stack+0x2c/0x3c [ 69.275546][ T4693] __dump_stack+0x30/0x40 [ 69.276153][ T4693] dump_stack_lvl+0xf4/0x15c [ 69.276871][ T4693] dump_stack+0x1c/0x5c [ 69.277520][ T4693] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.278347][ T4693] dccp_xmit_packet+0x298/0x460 [ 69.279109][ T4693] dccp_write_xmit+0x118/0x1d0 [ 69.279888][ T4693] dccp_sendmsg+0x510/0x850 [ 69.280613][ T4693] inet_sendmsg+0x154/0x27c [ 69.281393][ T4693] __sys_sendto+0x30c/0x420 [ 69.282107][ T4693] __arm64_sys_sendto+0xe4/0x104 [ 69.282878][ T4693] invoke_syscall+0x98/0x28c [ 69.283642][ T4693] el0_svc_common+0x13c/0x258 [ 69.284404][ T4693] do_el0_svc+0x5c/0x140 [ 69.285078][ T4693] el0_svc+0x78/0x1d0 [ 69.285735][ T4693] el0t_64_sync_handler+0xcc/0xe4 [ 69.286533][ T4693] el0t_64_sync+0x1a0/0x1a4 [ 69.287481][ T4693] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.290415][ T4693] CPU: 1 PID: 4693 Comm: syz.0.19 Not tainted syzkaller #0 [ 69.291604][ T4693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.293105][ T4693] Call trace: [ 69.293569][ T4693] dump_backtrace+0x0/0x458 [ 69.294224][ T4693] show_stack+0x2c/0x3c [ 69.294818][ T4693] __dump_stack+0x30/0x40 [ 69.295484][ T4693] dump_stack_lvl+0xf4/0x15c [ 69.296157][ T4693] dump_stack+0x1c/0x5c [ 69.296764][ T4693] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.297550][ T4693] dccp_xmit_packet+0x298/0x460 [ 69.298280][ T4693] dccp_write_xmit+0x118/0x1d0 [ 69.299065][ T4693] dccp_sendmsg+0x510/0x850 [ 69.299839][ T4693] inet_sendmsg+0x154/0x27c [ 69.300543][ T4693] __sys_sendto+0x30c/0x420 [ 69.301242][ T4693] __arm64_sys_sendto+0xe4/0x104 [ 69.302071][ T4693] invoke_syscall+0x98/0x28c [ 69.302797][ T4693] el0_svc_common+0x13c/0x258 [ 69.303493][ T4693] do_el0_svc+0x5c/0x140 [ 69.304121][ T4693] el0_svc+0x78/0x1d0 [ 69.304784][ T4693] el0t_64_sync_handler+0xcc/0xe4 [ 69.305662][ T4693] el0t_64_sync+0x1a0/0x1a4 [ 69.306596][ T4693] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.308483][ T4693] CPU: 1 PID: 4693 Comm: syz.0.19 Not tainted syzkaller #0 [ 69.309602][ T4693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.311183][ T4693] Call trace: [ 69.311685][ T4693] dump_backtrace+0x0/0x458 [ 69.312393][ T4693] show_stack+0x2c/0x3c [ 69.313041][ T4693] __dump_stack+0x30/0x40 [ 69.313696][ T4693] dump_stack_lvl+0xf4/0x15c [ 69.314395][ T4693] dump_stack+0x1c/0x5c [ 69.314950][ T4693] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.315779][ T4693] dccp_xmit_packet+0x298/0x460 [ 69.316530][ T4693] dccp_write_xmit+0x118/0x1d0 [ 69.317233][ T4693] dccp_sendmsg+0x510/0x850 [ 69.317843][ T4693] inet_sendmsg+0x154/0x27c [ 69.318520][ T4693] __sys_sendto+0x30c/0x420 [ 69.319159][ T4693] __arm64_sys_sendto+0xe4/0x104 [ 69.319896][ T4693] invoke_syscall+0x98/0x28c [ 69.320711][ T4693] el0_svc_common+0x13c/0x258 [ 69.321395][ T4693] do_el0_svc+0x5c/0x140 [ 69.322054][ T4693] el0_svc+0x78/0x1d0 [ 69.322662][ T4693] el0t_64_sync_handler+0xcc/0xe4 [ 69.323413][ T4693] el0t_64_sync+0x1a0/0x1a4 [ 69.324264][ T4693] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.325992][ T4693] CPU: 1 PID: 4693 Comm: syz.0.19 Not tainted syzkaller #0 [ 69.327013][ T4693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.328616][ T4693] Call trace: [ 69.329142][ T4693] dump_backtrace+0x0/0x458 [ 69.329839][ T4693] show_stack+0x2c/0x3c [ 69.330470][ T4693] __dump_stack+0x30/0x40 [ 69.331097][ T4693] dump_stack_lvl+0xf4/0x15c [ 69.331833][ T4693] dump_stack+0x1c/0x5c [ 69.332444][ T4693] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.333265][ T4693] dccp_xmit_packet+0x298/0x460 [ 69.334016][ T4693] dccp_write_xmit+0x118/0x1d0 [ 69.334773][ T4693] dccp_sendmsg+0x510/0x850 [ 69.335429][ T4693] inet_sendmsg+0x154/0x27c [ 69.336061][ T4693] __sys_sendto+0x30c/0x420 [ 69.336807][ T4693] __arm64_sys_sendto+0xe4/0x104 [ 69.337527][ T4693] invoke_syscall+0x98/0x28c [ 69.338232][ T4693] el0_svc_common+0x13c/0x258 [ 69.338926][ T4693] do_el0_svc+0x5c/0x140 [ 69.339536][ T4693] el0_svc+0x78/0x1d0 [ 69.340136][ T4693] el0t_64_sync_handler+0xcc/0xe4 [ 69.340861][ T4693] el0t_64_sync+0x1a0/0x1a4 [ 69.341847][ T4693] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.344027][ T4693] CPU: 1 PID: 4693 Comm: syz.0.19 Not tainted syzkaller #0 [ 69.345215][ T4693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.346712][ T4693] Call trace: [ 69.347172][ T4693] dump_backtrace+0x0/0x458 [ 69.347803][ T4693] show_stack+0x2c/0x3c [ 69.348423][ T4693] __dump_stack+0x30/0x40 [ 69.349170][ T4693] dump_stack_lvl+0xf4/0x15c [ 69.349877][ T4693] dump_stack+0x1c/0x5c [ 69.350637][ T4693] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.351572][ T4693] dccp_xmit_packet+0x298/0x460 [ 69.352388][ T4693] dccp_write_xmit+0x118/0x1d0 [ 69.353181][ T4693] dccp_sendmsg+0x510/0x850 [ 69.353909][ T4693] inet_sendmsg+0x154/0x27c [ 69.354685][ T4693] __sys_sendto+0x30c/0x420 [ 69.355400][ T4693] __arm64_sys_sendto+0xe4/0x104 [ 69.356182][ T4693] invoke_syscall+0x98/0x28c [ 69.356916][ T4693] el0_svc_common+0x13c/0x258 [ 69.357712][ T4693] do_el0_svc+0x5c/0x140 [ 69.358345][ T4693] el0_svc+0x78/0x1d0 [ 69.358964][ T4693] el0t_64_sync_handler+0xcc/0xe4 [ 69.359793][ T4693] el0t_64_sync+0x1a0/0x1a4 [ 69.360719][ T4693] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.362416][ T4693] CPU: 1 PID: 4693 Comm: syz.0.19 Not tainted syzkaller #0 [ 69.363541][ T4693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.365080][ T4693] Call trace: [ 69.365578][ T4693] dump_backtrace+0x0/0x458 [ 69.366332][ T4693] show_stack+0x2c/0x3c [ 69.366939][ T4693] __dump_stack+0x30/0x40 [ 69.367568][ T4693] dump_stack_lvl+0xf4/0x15c [ 69.368262][ T4693] dump_stack+0x1c/0x5c [ 69.368897][ T4693] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.369740][ T4693] dccp_xmit_packet+0x298/0x460 [ 69.370522][ T4693] dccp_write_xmit+0x118/0x1d0 [ 69.371288][ T4693] dccp_sendmsg+0x510/0x850 [ 69.372040][ T4693] inet_sendmsg+0x154/0x27c [ 69.372778][ T4693] __sys_sendto+0x30c/0x420 [ 69.373503][ T4693] __arm64_sys_sendto+0xe4/0x104 [ 69.374237][ T4693] invoke_syscall+0x98/0x28c [ 69.374979][ T4693] el0_svc_common+0x13c/0x258 [ 69.375693][ T4693] do_el0_svc+0x5c/0x140 [ 69.376315][ T4693] el0_svc+0x78/0x1d0 [ 69.376975][ T4693] el0t_64_sync_handler+0xcc/0xe4 [ 69.377802][ T4693] el0t_64_sync+0x1a0/0x1a4 [ 69.379470][ T4693] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.381169][ T4693] CPU: 1 PID: 4693 Comm: syz.0.19 Not tainted syzkaller #0 [ 69.382223][ T4693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.383665][ T4693] Call trace: [ 69.384155][ T4693] dump_backtrace+0x0/0x458 [ 69.384897][ T4693] show_stack+0x2c/0x3c [ 69.385480][ T4693] __dump_stack+0x30/0x40 [ 69.386100][ T4693] dump_stack_lvl+0xf4/0x15c [ 69.386799][ T4693] dump_stack+0x1c/0x5c [ 69.387466][ T4693] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.388350][ T4693] dccp_xmit_packet+0x298/0x460 [ 69.389146][ T4693] dccp_write_xmit+0x118/0x1d0 [ 69.389944][ T4693] dccp_sendmsg+0x510/0x850 [ 69.390676][ T4693] inet_sendmsg+0x154/0x27c [ 69.391444][ T4693] __sys_sendto+0x30c/0x420 [ 69.392182][ T4693] __arm64_sys_sendto+0xe4/0x104 [ 69.393131][ T4693] invoke_syscall+0x98/0x28c [ 69.394012][ T4693] el0_svc_common+0x13c/0x258 [ 69.394815][ T4693] do_el0_svc+0x5c/0x140 [ 69.395511][ T4693] el0_svc+0x78/0x1d0 [ 69.396112][ T4693] el0t_64_sync_handler+0xcc/0xe4 [ 69.396886][ T4693] el0t_64_sync+0x1a0/0x1a4 [ 69.410886][ T4695] dccp_xmit_packet: Payload too large (65475) for featneg. [ 69.429552][ T4697] dccp_xmit_packet: Payload too large (65475) for featneg. [ 69.437285][ T4697] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.439737][ T4697] CPU: 1 PID: 4697 Comm: syz.0.21 Not tainted syzkaller #0 [ 69.440825][ T4697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.442288][ T4697] Call trace: [ 69.442811][ T4697] dump_backtrace+0x0/0x458 [ 69.443448][ T4697] show_stack+0x2c/0x3c [ 69.444011][ T4697] __dump_stack+0x30/0x40 [ 69.444715][ T4697] dump_stack_lvl+0xf4/0x15c [ 69.445422][ T4697] dump_stack+0x1c/0x5c [ 69.446085][ T4697] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.446936][ T4697] dccp_xmit_packet+0x298/0x460 [ 69.447667][ T4697] dccp_write_xmit+0x118/0x1d0 [ 69.448406][ T4697] dccp_sendmsg+0x510/0x850 [ 69.449135][ T4697] inet_sendmsg+0x154/0x27c [ 69.449868][ T4697] __sys_sendto+0x30c/0x420 [ 69.450661][ T4697] __arm64_sys_sendto+0xe4/0x104 [ 69.451465][ T4697] invoke_syscall+0x98/0x28c [ 69.452252][ T4697] el0_svc_common+0x13c/0x258 [ 69.452970][ T4697] do_el0_svc+0x5c/0x140 [ 69.453610][ T4697] el0_svc+0x78/0x1d0 [ 69.454215][ T4697] el0t_64_sync_handler+0xcc/0xe4 [ 69.454935][ T4697] el0t_64_sync+0x1a0/0x1a4 [ 69.457682][ T4697] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.459962][ T4697] CPU: 1 PID: 4697 Comm: syz.0.21 Not tainted syzkaller #0 [ 69.461034][ T4697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.462490][ T4697] Call trace: [ 69.462936][ T4697] dump_backtrace+0x0/0x458 [ 69.463619][ T4697] show_stack+0x2c/0x3c [ 69.464283][ T4697] __dump_stack+0x30/0x40 [ 69.464888][ T4697] dump_stack_lvl+0xf4/0x15c [ 69.465644][ T4697] dump_stack+0x1c/0x5c [ 69.466250][ T4697] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.467048][ T4697] dccp_xmit_packet+0x298/0x460 [ 69.467742][ T4697] dccp_write_xmit+0x118/0x1d0 [ 69.468579][ T4697] dccp_sendmsg+0x510/0x850 [ 69.469324][ T4697] inet_sendmsg+0x154/0x27c [ 69.470032][ T4697] __sys_sendto+0x30c/0x420 [ 69.470754][ T4697] __arm64_sys_sendto+0xe4/0x104 [ 69.471619][ T4697] invoke_syscall+0x98/0x28c [ 69.472502][ T4697] el0_svc_common+0x13c/0x258 [ 69.473244][ T4697] do_el0_svc+0x5c/0x140 [ 69.473896][ T4697] el0_svc+0x78/0x1d0 [ 69.474573][ T4697] el0t_64_sync_handler+0xcc/0xe4 [ 69.475310][ T4697] el0t_64_sync+0x1a0/0x1a4 [ 69.476135][ T4697] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.477896][ T4697] CPU: 1 PID: 4697 Comm: syz.0.21 Not tainted syzkaller #0 [ 69.479110][ T4697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.480779][ T4697] Call trace: [ 69.481320][ T4697] dump_backtrace+0x0/0x458 [ 69.482027][ T4697] show_stack+0x2c/0x3c [ 69.482642][ T4697] __dump_stack+0x30/0x40 [ 69.483316][ T4697] dump_stack_lvl+0xf4/0x15c [ 69.483988][ T4697] dump_stack+0x1c/0x5c [ 69.484834][ T4697] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.485711][ T4697] dccp_xmit_packet+0x298/0x460 [ 69.486486][ T4697] dccp_write_xmit+0x118/0x1d0 [ 69.487244][ T4697] dccp_sendmsg+0x510/0x850 [ 69.487962][ T4697] inet_sendmsg+0x154/0x27c [ 69.488687][ T4697] __sys_sendto+0x30c/0x420 [ 69.489442][ T4697] __arm64_sys_sendto+0xe4/0x104 [ 69.490246][ T4697] invoke_syscall+0x98/0x28c [ 69.490998][ T4697] el0_svc_common+0x13c/0x258 [ 69.491770][ T4697] do_el0_svc+0x5c/0x140 [ 69.492547][ T4697] el0_svc+0x78/0x1d0 [ 69.493167][ T4697] el0t_64_sync_handler+0xcc/0xe4 [ 69.493957][ T4697] el0t_64_sync+0x1a0/0x1a4 [ 69.495100][ T4697] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.496945][ T4697] CPU: 1 PID: 4697 Comm: syz.0.21 Not tainted syzkaller #0 [ 69.497993][ T4697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.499605][ T4697] Call trace: [ 69.500135][ T4697] dump_backtrace+0x0/0x458 [ 69.500880][ T4697] show_stack+0x2c/0x3c [ 69.501526][ T4697] __dump_stack+0x30/0x40 [ 69.502220][ T4697] dump_stack_lvl+0xf4/0x15c [ 69.502911][ T4697] dump_stack+0x1c/0x5c [ 69.503591][ T4697] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.504468][ T4697] dccp_xmit_packet+0x298/0x460 [ 69.505204][ T4697] dccp_write_xmit+0x118/0x1d0 [ 69.505941][ T4697] dccp_sendmsg+0x510/0x850 [ 69.506656][ T4697] inet_sendmsg+0x154/0x27c [ 69.507391][ T4697] __sys_sendto+0x30c/0x420 [ 69.508105][ T4697] __arm64_sys_sendto+0xe4/0x104 [ 69.508903][ T4697] invoke_syscall+0x98/0x28c [ 69.509593][ T4697] el0_svc_common+0x13c/0x258 [ 69.510259][ T4697] do_el0_svc+0x5c/0x140 [ 69.510908][ T4697] el0_svc+0x78/0x1d0 [ 69.511510][ T4697] el0t_64_sync_handler+0xcc/0xe4 [ 69.512332][ T4697] el0t_64_sync+0x1a0/0x1a4 [ 69.513156][ T4697] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.515054][ T4697] CPU: 1 PID: 4697 Comm: syz.0.21 Not tainted syzkaller #0 [ 69.516151][ T4697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.517632][ T4697] Call trace: [ 69.518170][ T4697] dump_backtrace+0x0/0x458 [ 69.518937][ T4697] show_stack+0x2c/0x3c [ 69.519579][ T4697] __dump_stack+0x30/0x40 [ 69.520309][ T4697] dump_stack_lvl+0xf4/0x15c [ 69.521005][ T4697] dump_stack+0x1c/0x5c [ 69.521787][ T4697] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.522621][ T4697] dccp_xmit_packet+0x298/0x460 [ 69.523457][ T4697] dccp_write_xmit+0x118/0x1d0 [ 69.524287][ T4697] dccp_sendmsg+0x510/0x850 [ 69.524980][ T4697] inet_sendmsg+0x154/0x27c [ 69.525711][ T4697] __sys_sendto+0x30c/0x420 [ 69.526396][ T4697] __arm64_sys_sendto+0xe4/0x104 [ 69.527196][ T4697] invoke_syscall+0x98/0x28c [ 69.527889][ T4697] el0_svc_common+0x13c/0x258 [ 69.528645][ T4697] do_el0_svc+0x5c/0x140 [ 69.529304][ T4697] el0_svc+0x78/0x1d0 [ 69.529933][ T4697] el0t_64_sync_handler+0xcc/0xe4 [ 69.530764][ T4697] el0t_64_sync+0x1a0/0x1a4 [ 69.532454][ T4697] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.534165][ T4697] CPU: 1 PID: 4697 Comm: syz.0.21 Not tainted syzkaller #0 [ 69.535210][ T4697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.536737][ T4697] Call trace: [ 69.537199][ T4697] dump_backtrace+0x0/0x458 [ 69.537832][ T4697] show_stack+0x2c/0x3c [ 69.538559][ T4697] __dump_stack+0x30/0x40 [ 69.539231][ T4697] dump_stack_lvl+0xf4/0x15c [ 69.539973][ T4697] dump_stack+0x1c/0x5c [ 69.540718][ T4697] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.541609][ T4697] dccp_xmit_packet+0x298/0x460 [ 69.542340][ T4697] dccp_write_xmit+0x118/0x1d0 [ 69.543108][ T4697] dccp_sendmsg+0x510/0x850 [ 69.543944][ T4697] inet_sendmsg+0x154/0x27c [ 69.544711][ T4697] __sys_sendto+0x30c/0x420 [ 69.545435][ T4697] __arm64_sys_sendto+0xe4/0x104 [ 69.546265][ T4697] invoke_syscall+0x98/0x28c [ 69.546989][ T4697] el0_svc_common+0x13c/0x258 [ 69.547767][ T4697] do_el0_svc+0x5c/0x140 [ 69.548399][ T4697] el0_svc+0x78/0x1d0 [ 69.549060][ T4697] el0t_64_sync_handler+0xcc/0xe4 [ 69.549840][ T4697] el0t_64_sync+0x1a0/0x1a4 [ 69.550883][ T4697] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.552580][ T4697] CPU: 1 PID: 4697 Comm: syz.0.21 Not tainted syzkaller #0 [ 69.553656][ T4697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.555166][ T4697] Call trace: [ 69.555640][ T4697] dump_backtrace+0x0/0x458 [ 69.556340][ T4697] show_stack+0x2c/0x3c [ 69.556917][ T4697] __dump_stack+0x30/0x40 [ 69.557589][ T4697] dump_stack_lvl+0xf4/0x15c [ 69.558260][ T4697] dump_stack+0x1c/0x5c [ 69.558936][ T4697] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.559844][ T4697] dccp_xmit_packet+0x298/0x460 [ 69.560594][ T4697] dccp_write_xmit+0x118/0x1d0 [ 69.561418][ T4697] dccp_sendmsg+0x510/0x850 [ 69.562221][ T4697] inet_sendmsg+0x154/0x27c [ 69.562946][ T4697] __sys_sendto+0x30c/0x420 [ 69.563625][ T4697] __arm64_sys_sendto+0xe4/0x104 [ 69.564349][ T4697] invoke_syscall+0x98/0x28c [ 69.565101][ T4697] el0_svc_common+0x13c/0x258 [ 69.565845][ T4697] do_el0_svc+0x5c/0x140 [ 69.566553][ T4697] el0_svc+0x78/0x1d0 [ 69.567284][ T4697] el0t_64_sync_handler+0xcc/0xe4 [ 69.568063][ T4697] el0t_64_sync+0x1a0/0x1a4 [ 69.569054][ T4697] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.570827][ T4697] CPU: 1 PID: 4697 Comm: syz.0.21 Not tainted syzkaller #0 [ 69.571909][ T4697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.573470][ T4697] Call trace: [ 69.573924][ T4697] dump_backtrace+0x0/0x458 [ 69.574622][ T4697] show_stack+0x2c/0x3c [ 69.575293][ T4697] __dump_stack+0x30/0x40 [ 69.575917][ T4697] dump_stack_lvl+0xf4/0x15c [ 69.576581][ T4697] dump_stack+0x1c/0x5c [ 69.577263][ T4697] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.578095][ T4697] dccp_xmit_packet+0x298/0x460 [ 69.578869][ T4697] dccp_write_xmit+0x118/0x1d0 [ 69.579643][ T4697] dccp_sendmsg+0x510/0x850 [ 69.580342][ T4697] inet_sendmsg+0x154/0x27c [ 69.581220][ T4697] __sys_sendto+0x30c/0x420 [ 69.581962][ T4697] __arm64_sys_sendto+0xe4/0x104 [ 69.582806][ T4697] invoke_syscall+0x98/0x28c [ 69.583549][ T4697] el0_svc_common+0x13c/0x258 [ 69.584299][ T4697] do_el0_svc+0x5c/0x140 [ 69.584961][ T4697] el0_svc+0x78/0x1d0 [ 69.585566][ T4697] el0t_64_sync_handler+0xcc/0xe4 [ 69.586315][ T4697] el0t_64_sync+0x1a0/0x1a4 [ 69.587173][ T4697] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.589173][ T4697] CPU: 1 PID: 4697 Comm: syz.0.21 Not tainted syzkaller #0 [ 69.590339][ T4697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.591776][ T4697] Call trace: [ 69.592236][ T4697] dump_backtrace+0x0/0x458 [ 69.592885][ T4697] show_stack+0x2c/0x3c [ 69.593453][ T4697] __dump_stack+0x30/0x40 [ 69.594081][ T4697] dump_stack_lvl+0xf4/0x15c [ 69.594750][ T4697] dump_stack+0x1c/0x5c [ 69.595327][ T4697] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.596129][ T4697] dccp_xmit_packet+0x298/0x460 [ 69.596841][ T4697] dccp_write_xmit+0x118/0x1d0 [ 69.597489][ T4697] dccp_sendmsg+0x510/0x850 [ 69.598133][ T4697] inet_sendmsg+0x154/0x27c [ 69.598841][ T4697] __sys_sendto+0x30c/0x420 [ 69.599565][ T4697] __arm64_sys_sendto+0xe4/0x104 [ 69.600315][ T4697] invoke_syscall+0x98/0x28c [ 69.600951][ T4697] el0_svc_common+0x13c/0x258 [ 69.601759][ T4697] do_el0_svc+0x5c/0x140 [ 69.602440][ T4697] el0_svc+0x78/0x1d0 [ 69.603063][ T4697] el0t_64_sync_handler+0xcc/0xe4 [ 69.603875][ T4697] el0t_64_sync+0x1a0/0x1a4 [ 69.609719][ T2364] cfg80211: failed to load regulatory.db [ 69.609875][ T2063] ieee802154 phy0 wpan0: encryption failed: -22 [ 69.611757][ T2063] ieee802154 phy1 wpan1: encryption failed: -22 [ 69.655563][ T4699] dccp_xmit_packet: Payload too large (65475) for featneg. [ 69.674890][ T4699] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.676679][ T4699] CPU: 0 PID: 4699 Comm: syz.0.22 Not tainted syzkaller #0 [ 69.677792][ T4699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.679603][ T4699] Call trace: [ 69.680269][ T4699] dump_backtrace+0x0/0x458 [ 69.681099][ T4699] show_stack+0x2c/0x3c [ 69.681842][ T4699] __dump_stack+0x30/0x40 [ 69.682577][ T4699] dump_stack_lvl+0xf4/0x15c [ 69.683343][ T4699] dump_stack+0x1c/0x5c [ 69.684072][ T4699] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.685042][ T4699] dccp_xmit_packet+0x298/0x460 [ 69.685917][ T4699] dccp_write_xmit+0x118/0x1d0 [ 69.686731][ T4699] dccp_sendmsg+0x510/0x850 [ 69.687513][ T4699] inet_sendmsg+0x154/0x27c [ 69.688274][ T4699] __sys_sendto+0x30c/0x420 [ 69.689114][ T4699] __arm64_sys_sendto+0xe4/0x104 [ 69.689967][ T4699] invoke_syscall+0x98/0x28c [ 69.690824][ T4699] el0_svc_common+0x13c/0x258 [ 69.691688][ T4699] do_el0_svc+0x5c/0x140 [ 69.692531][ T4699] el0_svc+0x78/0x1d0 [ 69.693253][ T4699] el0t_64_sync_handler+0xcc/0xe4 [ 69.694136][ T4699] el0t_64_sync+0x1a0/0x1a4 [ 69.697767][ T4699] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.698562][ T21] Bluetooth: hci0: command 0x040f tx timeout [ 69.700543][ T4699] CPU: 0 PID: 4699 Comm: syz.0.22 Not tainted syzkaller #0 [ 69.701865][ T4699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.703515][ T4699] Call trace: [ 69.704043][ T4699] dump_backtrace+0x0/0x458 [ 69.704780][ T4699] show_stack+0x2c/0x3c [ 69.705505][ T4699] __dump_stack+0x30/0x40 [ 69.706178][ T4699] dump_stack_lvl+0xf4/0x15c [ 69.707061][ T4699] dump_stack+0x1c/0x5c [ 69.707781][ T4699] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.708722][ T4699] dccp_xmit_packet+0x298/0x460 [ 69.709558][ T4699] dccp_write_xmit+0x118/0x1d0 [ 69.710445][ T4699] dccp_sendmsg+0x510/0x850 [ 69.711286][ T4699] inet_sendmsg+0x154/0x27c [ 69.712148][ T4699] __sys_sendto+0x30c/0x420 [ 69.712969][ T4699] __arm64_sys_sendto+0xe4/0x104 [ 69.713830][ T4699] invoke_syscall+0x98/0x28c [ 69.714747][ T4699] el0_svc_common+0x13c/0x258 [ 69.715666][ T4699] do_el0_svc+0x5c/0x140 [ 69.716440][ T4699] el0_svc+0x78/0x1d0 [ 69.717149][ T4699] el0t_64_sync_handler+0xcc/0xe4 [ 69.718114][ T4699] el0t_64_sync+0x1a0/0x1a4 [ 69.721370][ T4699] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.723270][ T4699] CPU: 0 PID: 4699 Comm: syz.0.22 Not tainted syzkaller #0 [ 69.724433][ T4699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.726105][ T4699] Call trace: [ 69.726682][ T4699] dump_backtrace+0x0/0x458 [ 69.727500][ T4699] show_stack+0x2c/0x3c [ 69.728229][ T4699] __dump_stack+0x30/0x40 [ 69.728939][ T4699] dump_stack_lvl+0xf4/0x15c [ 69.729810][ T4699] dump_stack+0x1c/0x5c [ 69.730527][ T4699] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.731391][ T4699] dccp_xmit_packet+0x298/0x460 [ 69.732274][ T4699] dccp_write_xmit+0x118/0x1d0 [ 69.733153][ T4699] dccp_sendmsg+0x510/0x850 [ 69.734028][ T4699] inet_sendmsg+0x154/0x27c [ 69.734765][ T4699] __sys_sendto+0x30c/0x420 [ 69.735488][ T4699] __arm64_sys_sendto+0xe4/0x104 [ 69.736340][ T4699] invoke_syscall+0x98/0x28c [ 69.737140][ T4699] el0_svc_common+0x13c/0x258 [ 69.737915][ T4699] do_el0_svc+0x5c/0x140 [ 69.738685][ T4699] el0_svc+0x78/0x1d0 [ 69.739408][ T4699] el0t_64_sync_handler+0xcc/0xe4 [ 69.740422][ T4699] el0t_64_sync+0x1a0/0x1a4 [ 69.742631][ T4699] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.744485][ T4699] CPU: 0 PID: 4699 Comm: syz.0.22 Not tainted syzkaller #0 [ 69.745731][ T4699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.747402][ T4699] Call trace: [ 69.747943][ T4699] dump_backtrace+0x0/0x458 [ 69.748716][ T4699] show_stack+0x2c/0x3c [ 69.749424][ T4699] __dump_stack+0x30/0x40 [ 69.750190][ T4699] dump_stack_lvl+0xf4/0x15c [ 69.750975][ T4699] dump_stack+0x1c/0x5c [ 69.751710][ T4699] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.752654][ T4699] dccp_xmit_packet+0x298/0x460 [ 69.753496][ T4699] dccp_write_xmit+0x118/0x1d0 [ 69.754483][ T4699] dccp_sendmsg+0x510/0x850 [ 69.755405][ T4699] inet_sendmsg+0x154/0x27c [ 69.756212][ T4699] __sys_sendto+0x30c/0x420 [ 69.756994][ T4699] __arm64_sys_sendto+0xe4/0x104 [ 69.757876][ T4699] invoke_syscall+0x98/0x28c [ 69.758676][ T4699] el0_svc_common+0x13c/0x258 [ 69.759506][ T4699] do_el0_svc+0x5c/0x140 [ 69.760302][ T4699] el0_svc+0x78/0x1d0 [ 69.761051][ T4699] el0t_64_sync_handler+0xcc/0xe4 [ 69.761880][ T4699] el0t_64_sync+0x1a0/0x1a4 [ 69.765180][ T4699] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.766901][ T4699] CPU: 1 PID: 4699 Comm: syz.0.22 Not tainted syzkaller #0 [ 69.767927][ T4699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.769567][ T4699] Call trace: [ 69.770116][ T4699] dump_backtrace+0x0/0x458 [ 69.770931][ T4699] show_stack+0x2c/0x3c [ 69.771642][ T4699] __dump_stack+0x30/0x40 [ 69.772368][ T4699] dump_stack_lvl+0xf4/0x15c [ 69.773139][ T4699] dump_stack+0x1c/0x5c [ 69.773828][ T4699] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.774655][ T4699] dccp_xmit_packet+0x298/0x460 [ 69.775468][ T4699] dccp_write_xmit+0x118/0x1d0 [ 69.776225][ T4699] dccp_sendmsg+0x510/0x850 [ 69.776958][ T4699] inet_sendmsg+0x154/0x27c [ 69.777709][ T4699] __sys_sendto+0x30c/0x420 [ 69.778440][ T4699] __arm64_sys_sendto+0xe4/0x104 [ 69.779295][ T4699] invoke_syscall+0x98/0x28c [ 69.780020][ T4699] el0_svc_common+0x13c/0x258 [ 69.780831][ T4699] do_el0_svc+0x5c/0x140 [ 69.781541][ T4699] el0_svc+0x78/0x1d0 [ 69.782216][ T4699] el0t_64_sync_handler+0xcc/0xe4 [ 69.783062][ T4699] el0t_64_sync+0x1a0/0x1a4 [ 69.785560][ T4699] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.787222][ T4699] CPU: 1 PID: 4699 Comm: syz.0.22 Not tainted syzkaller #0 [ 69.788265][ T4699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.789826][ T4699] Call trace: [ 69.790404][ T4699] dump_backtrace+0x0/0x458 [ 69.791165][ T4699] show_stack+0x2c/0x3c [ 69.791896][ T4699] __dump_stack+0x30/0x40 [ 69.792636][ T4699] dump_stack_lvl+0xf4/0x15c [ 69.793387][ T4699] dump_stack+0x1c/0x5c [ 69.794005][ T4699] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.794824][ T4699] dccp_xmit_packet+0x298/0x460 [ 69.795649][ T4699] dccp_write_xmit+0x118/0x1d0 [ 69.796468][ T4699] dccp_sendmsg+0x510/0x850 [ 69.797191][ T4699] inet_sendmsg+0x154/0x27c [ 69.797926][ T4699] __sys_sendto+0x30c/0x420 [ 69.798703][ T4699] __arm64_sys_sendto+0xe4/0x104 [ 69.799460][ T4699] invoke_syscall+0x98/0x28c [ 69.800187][ T4699] el0_svc_common+0x13c/0x258 [ 69.801036][ T4699] do_el0_svc+0x5c/0x140 [ 69.801763][ T4699] el0_svc+0x78/0x1d0 [ 69.802418][ T4699] el0t_64_sync_handler+0xcc/0xe4 [ 69.803198][ T4699] el0t_64_sync+0x1a0/0x1a4 [ 69.806211][ T4699] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.807938][ T4699] CPU: 1 PID: 4699 Comm: syz.0.22 Not tainted syzkaller #0 [ 69.809053][ T4699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.810561][ T4699] Call trace: [ 69.811197][ T4699] dump_backtrace+0x0/0x458 [ 69.812045][ T4699] show_stack+0x2c/0x3c [ 69.812793][ T4699] __dump_stack+0x30/0x40 [ 69.813620][ T4699] dump_stack_lvl+0xf4/0x15c [ 69.814360][ T4699] dump_stack+0x1c/0x5c [ 69.815033][ T4699] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.815927][ T4699] dccp_xmit_packet+0x298/0x460 [ 69.816744][ T4699] dccp_write_xmit+0x118/0x1d0 [ 69.817595][ T4699] dccp_sendmsg+0x510/0x850 [ 69.818371][ T4699] inet_sendmsg+0x154/0x27c [ 69.819097][ T4699] __sys_sendto+0x30c/0x420 [ 69.819744][ T4699] __arm64_sys_sendto+0xe4/0x104 [ 69.820570][ T4699] invoke_syscall+0x98/0x28c [ 69.821307][ T4699] el0_svc_common+0x13c/0x258 [ 69.822026][ T4699] do_el0_svc+0x5c/0x140 [ 69.822686][ T4699] el0_svc+0x78/0x1d0 [ 69.823327][ T4699] el0t_64_sync_handler+0xcc/0xe4 [ 69.824122][ T4699] el0t_64_sync+0x1a0/0x1a4 [ 69.827308][ T4699] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.829184][ T4699] CPU: 1 PID: 4699 Comm: syz.0.22 Not tainted syzkaller #0 [ 69.830238][ T4699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.831645][ T4699] Call trace: [ 69.832139][ T4699] dump_backtrace+0x0/0x458 [ 69.832807][ T4699] show_stack+0x2c/0x3c [ 69.833404][ T4699] __dump_stack+0x30/0x40 [ 69.834100][ T4699] dump_stack_lvl+0xf4/0x15c [ 69.834738][ T4699] dump_stack+0x1c/0x5c [ 69.835340][ T4699] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.836162][ T4699] dccp_xmit_packet+0x298/0x460 [ 69.836905][ T4699] dccp_write_xmit+0x118/0x1d0 [ 69.837593][ T4699] dccp_sendmsg+0x510/0x850 [ 69.838470][ T4699] inet_sendmsg+0x154/0x27c [ 69.839316][ T4699] __sys_sendto+0x30c/0x420 [ 69.840122][ T4699] __arm64_sys_sendto+0xe4/0x104 [ 69.840985][ T4699] invoke_syscall+0x98/0x28c [ 69.841716][ T4699] el0_svc_common+0x13c/0x258 [ 69.842515][ T4699] do_el0_svc+0x5c/0x140 [ 69.843223][ T4699] el0_svc+0x78/0x1d0 [ 69.843931][ T4699] el0t_64_sync_handler+0xcc/0xe4 [ 69.844834][ T4699] el0t_64_sync+0x1a0/0x1a4 [ 69.847516][ T4699] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.850836][ T4699] CPU: 1 PID: 4699 Comm: syz.0.22 Not tainted syzkaller #0 [ 69.851936][ T4699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.853334][ T4699] Call trace: [ 69.853871][ T4699] dump_backtrace+0x0/0x458 [ 69.854520][ T4699] show_stack+0x2c/0x3c [ 69.855137][ T4699] __dump_stack+0x30/0x40 [ 69.855843][ T4699] dump_stack_lvl+0xf4/0x15c [ 69.856588][ T4699] dump_stack+0x1c/0x5c [ 69.857255][ T4699] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.858147][ T4699] dccp_xmit_packet+0x298/0x460 [ 69.858910][ T4699] dccp_write_xmit+0x118/0x1d0 [ 69.859616][ T4699] dccp_sendmsg+0x510/0x850 [ 69.860351][ T4699] inet_sendmsg+0x154/0x27c [ 69.861129][ T4699] __sys_sendto+0x30c/0x420 [ 69.861824][ T4699] __arm64_sys_sendto+0xe4/0x104 [ 69.862614][ T4699] invoke_syscall+0x98/0x28c [ 69.863358][ T4699] el0_svc_common+0x13c/0x258 [ 69.864157][ T4699] do_el0_svc+0x5c/0x140 [ 69.864900][ T4699] el0_svc+0x78/0x1d0 [ 69.865589][ T4699] el0t_64_sync_handler+0xcc/0xe4 [ 69.866403][ T4699] el0t_64_sync+0x1a0/0x1a4 [ 69.869362][ T4699] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.870968][ T4699] CPU: 1 PID: 4699 Comm: syz.0.22 Not tainted syzkaller #0 [ 69.872013][ T4699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.873498][ T4699] Call trace: [ 69.874002][ T4699] dump_backtrace+0x0/0x458 [ 69.874688][ T4699] show_stack+0x2c/0x3c [ 69.875410][ T4699] __dump_stack+0x30/0x40 [ 69.876115][ T4699] dump_stack_lvl+0xf4/0x15c [ 69.876873][ T4699] dump_stack+0x1c/0x5c [ 69.877493][ T4699] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.878333][ T4699] dccp_xmit_packet+0x298/0x460 [ 69.879164][ T4699] dccp_write_xmit+0x118/0x1d0 [ 69.879900][ T4699] dccp_sendmsg+0x510/0x850 [ 69.880660][ T4699] inet_sendmsg+0x154/0x27c [ 69.881344][ T4699] __sys_sendto+0x30c/0x420 [ 69.882167][ T4699] __arm64_sys_sendto+0xe4/0x104 [ 69.883006][ T4699] invoke_syscall+0x98/0x28c [ 69.883758][ T4699] el0_svc_common+0x13c/0x258 [ 69.884526][ T4699] do_el0_svc+0x5c/0x140 [ 69.885202][ T4699] el0_svc+0x78/0x1d0 [ 69.885838][ T4699] el0t_64_sync_handler+0xcc/0xe4 [ 69.886648][ T4699] el0t_64_sync+0x1a0/0x1a4 [ 69.888865][ T4699] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.890629][ T4699] CPU: 1 PID: 4699 Comm: syz.0.22 Not tainted syzkaller #0 [ 69.891667][ T4699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.893139][ T4699] Call trace: [ 69.893605][ T4699] dump_backtrace+0x0/0x458 [ 69.894209][ T4699] show_stack+0x2c/0x3c [ 69.894823][ T4699] __dump_stack+0x30/0x40 [ 69.895515][ T4699] dump_stack_lvl+0xf4/0x15c [ 69.896220][ T4699] dump_stack+0x1c/0x5c [ 69.896845][ T4699] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.897670][ T4699] dccp_xmit_packet+0x298/0x460 [ 69.898424][ T4699] dccp_write_xmit+0x118/0x1d0 [ 69.899235][ T4699] dccp_sendmsg+0x510/0x850 [ 69.899936][ T4699] inet_sendmsg+0x154/0x27c [ 69.900644][ T4699] __sys_sendto+0x30c/0x420 [ 69.901382][ T4699] __arm64_sys_sendto+0xe4/0x104 [ 69.902143][ T4699] invoke_syscall+0x98/0x28c [ 69.902842][ T4699] el0_svc_common+0x13c/0x258 [ 69.903569][ T4699] do_el0_svc+0x5c/0x140 [ 69.904256][ T4699] el0_svc+0x78/0x1d0 [ 69.904827][ T4699] el0t_64_sync_handler+0xcc/0xe4 [ 69.905646][ T4699] el0t_64_sync+0x1a0/0x1a4 [ 69.907938][ T4699] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.909805][ T4699] CPU: 1 PID: 4699 Comm: syz.0.22 Not tainted syzkaller #0 [ 69.910940][ T4699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.912480][ T4699] Call trace: [ 69.912994][ T4699] dump_backtrace+0x0/0x458 [ 69.913689][ T4699] show_stack+0x2c/0x3c [ 69.914307][ T4699] __dump_stack+0x30/0x40 [ 69.914935][ T4699] dump_stack_lvl+0xf4/0x15c [ 69.915628][ T4699] dump_stack+0x1c/0x5c [ 69.916259][ T4699] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.916984][ T4699] dccp_xmit_packet+0x298/0x460 [ 69.917686][ T4699] dccp_write_xmit+0x118/0x1d0 [ 69.918415][ T4699] dccp_sendmsg+0x510/0x850 [ 69.919136][ T4699] inet_sendmsg+0x154/0x27c [ 69.919897][ T4699] __sys_sendto+0x30c/0x420 [ 69.920620][ T4699] __arm64_sys_sendto+0xe4/0x104 [ 69.921429][ T4699] invoke_syscall+0x98/0x28c [ 69.922139][ T4699] el0_svc_common+0x13c/0x258 [ 69.922889][ T4699] do_el0_svc+0x5c/0x140 [ 69.923586][ T4699] el0_svc+0x78/0x1d0 [ 69.924248][ T4699] el0t_64_sync_handler+0xcc/0xe4 [ 69.925049][ T4699] el0t_64_sync+0x1a0/0x1a4 [ 69.927009][ T4699] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.929908][ T4699] CPU: 1 PID: 4699 Comm: syz.0.22 Not tainted syzkaller #0 [ 69.930957][ T4699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.932654][ T4699] Call trace: [ 69.933167][ T4699] dump_backtrace+0x0/0x458 [ 69.933852][ T4699] show_stack+0x2c/0x3c [ 69.934520][ T4699] __dump_stack+0x30/0x40 [ 69.935197][ T4699] dump_stack_lvl+0xf4/0x15c [ 69.935879][ T4699] dump_stack+0x1c/0x5c [ 69.936536][ T4699] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.937368][ T4699] dccp_xmit_packet+0x298/0x460 [ 69.938130][ T4699] dccp_write_xmit+0x118/0x1d0 [ 69.938907][ T4699] dccp_sendmsg+0x510/0x850 [ 69.939628][ T4699] inet_sendmsg+0x154/0x27c [ 69.940461][ T4699] __sys_sendto+0x30c/0x420 [ 69.941234][ T4699] __arm64_sys_sendto+0xe4/0x104 [ 69.942053][ T4699] invoke_syscall+0x98/0x28c [ 69.942802][ T4699] el0_svc_common+0x13c/0x258 [ 69.943549][ T4699] do_el0_svc+0x5c/0x140 [ 69.944398][ T4699] el0_svc+0x78/0x1d0 [ 69.945084][ T4699] el0t_64_sync_handler+0xcc/0xe4 [ 69.946002][ T4699] el0t_64_sync+0x1a0/0x1a4 [ 69.948036][ T4699] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.949930][ T4699] CPU: 1 PID: 4699 Comm: syz.0.22 Not tainted syzkaller #0 [ 69.950979][ T4699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.952410][ T4699] Call trace: [ 69.952826][ T4699] dump_backtrace+0x0/0x458 [ 69.953475][ T4699] show_stack+0x2c/0x3c [ 69.954122][ T4699] __dump_stack+0x30/0x40 [ 69.954770][ T4699] dump_stack_lvl+0xf4/0x15c [ 69.955458][ T4699] dump_stack+0x1c/0x5c [ 69.956065][ T4699] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.956868][ T4699] dccp_xmit_packet+0x298/0x460 [ 69.957587][ T4699] dccp_write_xmit+0x118/0x1d0 [ 69.958376][ T4699] dccp_sendmsg+0x510/0x850 [ 69.959084][ T4699] inet_sendmsg+0x154/0x27c [ 69.959807][ T4699] __sys_sendto+0x30c/0x420 [ 69.960521][ T4699] __arm64_sys_sendto+0xe4/0x104 [ 69.961329][ T4699] invoke_syscall+0x98/0x28c [ 69.962116][ T4699] el0_svc_common+0x13c/0x258 [ 69.962915][ T4699] do_el0_svc+0x5c/0x140 [ 69.963616][ T4699] el0_svc+0x78/0x1d0 [ 69.964327][ T4699] el0t_64_sync_handler+0xcc/0xe4 [ 69.965180][ T4699] el0t_64_sync+0x1a0/0x1a4 [ 69.967428][ T4699] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.969365][ T4699] CPU: 1 PID: 4699 Comm: syz.0.22 Not tainted syzkaller #0 [ 69.970560][ T4699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.972064][ T4699] Call trace: [ 69.972588][ T4699] dump_backtrace+0x0/0x458 [ 69.973264][ T4699] show_stack+0x2c/0x3c [ 69.973976][ T4699] __dump_stack+0x30/0x40 [ 69.974688][ T4699] dump_stack_lvl+0xf4/0x15c [ 69.975392][ T4699] dump_stack+0x1c/0x5c [ 69.976097][ T4699] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.976992][ T4699] dccp_xmit_packet+0x298/0x460 [ 69.977966][ T4699] dccp_write_xmit+0x118/0x1d0 [ 69.978814][ T4699] dccp_sendmsg+0x510/0x850 [ 69.979509][ T4699] inet_sendmsg+0x154/0x27c [ 69.980185][ T4699] __sys_sendto+0x30c/0x420 [ 69.980869][ T4699] __arm64_sys_sendto+0xe4/0x104 [ 69.981663][ T4699] invoke_syscall+0x98/0x28c [ 69.982408][ T4699] el0_svc_common+0x13c/0x258 [ 69.983192][ T4699] do_el0_svc+0x5c/0x140 [ 69.983863][ T4699] el0_svc+0x78/0x1d0 [ 69.984560][ T4699] el0t_64_sync_handler+0xcc/0xe4 [ 69.985328][ T4699] el0t_64_sync+0x1a0/0x1a4 [ 69.987396][ T4699] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 69.989280][ T4699] CPU: 1 PID: 4699 Comm: syz.0.22 Not tainted syzkaller #0 [ 69.990326][ T4699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.991850][ T4699] Call trace: [ 69.992352][ T4699] dump_backtrace+0x0/0x458 [ 69.993106][ T4699] show_stack+0x2c/0x3c [ 69.993793][ T4699] __dump_stack+0x30/0x40 [ 69.994503][ T4699] dump_stack_lvl+0xf4/0x15c [ 69.995250][ T4699] dump_stack+0x1c/0x5c [ 69.995844][ T4699] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 69.996691][ T4699] dccp_xmit_packet+0x298/0x460 [ 69.997495][ T4699] dccp_write_xmit+0x118/0x1d0 [ 69.998324][ T4699] dccp_sendmsg+0x510/0x850 [ 69.999093][ T4699] inet_sendmsg+0x154/0x27c [ 69.999869][ T4699] __sys_sendto+0x30c/0x420 [ 70.000638][ T4699] __arm64_sys_sendto+0xe4/0x104 [ 70.001365][ T4699] invoke_syscall+0x98/0x28c [ 70.002132][ T4699] el0_svc_common+0x13c/0x258 [ 70.002929][ T4699] do_el0_svc+0x5c/0x140 [ 70.003628][ T4699] el0_svc+0x78/0x1d0 [ 70.004265][ T4699] el0t_64_sync_handler+0xcc/0xe4 [ 70.005022][ T4699] el0t_64_sync+0x1a0/0x1a4 [ 70.024358][ T4701] dccp_xmit_packet: Payload too large (65475) for featneg. [ 70.032078][ T4701] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.033843][ T4701] CPU: 0 PID: 4701 Comm: syz.0.23 Not tainted syzkaller #0 [ 70.034974][ T4701] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.036599][ T4701] Call trace: [ 70.037108][ T4701] dump_backtrace+0x0/0x458 [ 70.037835][ T4701] show_stack+0x2c/0x3c [ 70.038499][ T4701] __dump_stack+0x30/0x40 [ 70.039209][ T4701] dump_stack_lvl+0xf4/0x15c [ 70.039927][ T4701] dump_stack+0x1c/0x5c [ 70.040587][ T4701] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.041596][ T4701] dccp_xmit_packet+0x298/0x460 [ 70.042509][ T4701] dccp_write_xmit+0x118/0x1d0 [ 70.043345][ T4701] dccp_sendmsg+0x510/0x850 [ 70.044142][ T4701] inet_sendmsg+0x154/0x27c [ 70.044912][ T4701] __sys_sendto+0x30c/0x420 [ 70.045693][ T4701] __arm64_sys_sendto+0xe4/0x104 [ 70.046482][ T4701] invoke_syscall+0x98/0x28c [ 70.047387][ T4701] el0_svc_common+0x13c/0x258 [ 70.048258][ T4701] do_el0_svc+0x5c/0x140 [ 70.048970][ T4701] el0_svc+0x78/0x1d0 [ 70.049680][ T4701] el0t_64_sync_handler+0xcc/0xe4 [ 70.050645][ T4701] el0t_64_sync+0x1a0/0x1a4 [ 70.052322][ T4701] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.054302][ T4701] CPU: 0 PID: 4701 Comm: syz.0.23 Not tainted syzkaller #0 [ 70.055531][ T4701] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.057088][ T4701] Call trace: [ 70.057529][ T4701] dump_backtrace+0x0/0x458 [ 70.058202][ T4701] show_stack+0x2c/0x3c [ 70.058907][ T4701] __dump_stack+0x30/0x40 [ 70.059694][ T4701] dump_stack_lvl+0xf4/0x15c [ 70.060486][ T4701] dump_stack+0x1c/0x5c [ 70.061161][ T4701] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.062183][ T4701] dccp_xmit_packet+0x298/0x460 [ 70.063069][ T4701] dccp_write_xmit+0x118/0x1d0 [ 70.063866][ T4701] dccp_sendmsg+0x510/0x850 [ 70.064647][ T4701] inet_sendmsg+0x154/0x27c [ 70.065379][ T4701] __sys_sendto+0x30c/0x420 [ 70.066169][ T4701] __arm64_sys_sendto+0xe4/0x104 [ 70.067109][ T4701] invoke_syscall+0x98/0x28c [ 70.067889][ T4701] el0_svc_common+0x13c/0x258 [ 70.068671][ T4701] do_el0_svc+0x5c/0x140 [ 70.069398][ T4701] el0_svc+0x78/0x1d0 [ 70.070088][ T4701] el0t_64_sync_handler+0xcc/0xe4 [ 70.070920][ T4701] el0t_64_sync+0x1a0/0x1a4 [ 70.072048][ T4701] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.073812][ T4701] CPU: 0 PID: 4701 Comm: syz.0.23 Not tainted syzkaller #0 [ 70.074890][ T4701] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.076444][ T4701] Call trace: [ 70.076949][ T4701] dump_backtrace+0x0/0x458 [ 70.077663][ T4701] show_stack+0x2c/0x3c [ 70.078358][ T4701] __dump_stack+0x30/0x40 [ 70.079107][ T4701] dump_stack_lvl+0xf4/0x15c [ 70.079875][ T4701] dump_stack+0x1c/0x5c [ 70.080559][ T4701] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.081492][ T4701] dccp_xmit_packet+0x298/0x460 [ 70.082409][ T4701] dccp_write_xmit+0x118/0x1d0 [ 70.083253][ T4701] dccp_sendmsg+0x510/0x850 [ 70.083986][ T4701] inet_sendmsg+0x154/0x27c [ 70.084744][ T4701] __sys_sendto+0x30c/0x420 [ 70.085531][ T4701] __arm64_sys_sendto+0xe4/0x104 [ 70.086443][ T4701] invoke_syscall+0x98/0x28c [ 70.087234][ T4701] el0_svc_common+0x13c/0x258 [ 70.087991][ T4701] do_el0_svc+0x5c/0x140 [ 70.088674][ T4701] el0_svc+0x78/0x1d0 [ 70.089324][ T4701] el0t_64_sync_handler+0xcc/0xe4 [ 70.090189][ T4701] el0t_64_sync+0x1a0/0x1a4 [ 70.092186][ T4701] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.094049][ T4701] CPU: 1 PID: 4701 Comm: syz.0.23 Not tainted syzkaller #0 [ 70.095193][ T4701] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.096867][ T4701] Call trace: [ 70.097413][ T4701] dump_backtrace+0x0/0x458 [ 70.098058][ T4701] show_stack+0x2c/0x3c [ 70.098808][ T4701] __dump_stack+0x30/0x40 [ 70.099680][ T4701] dump_stack_lvl+0xf4/0x15c [ 70.100457][ T4701] dump_stack+0x1c/0x5c [ 70.101203][ T4701] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.102143][ T4701] dccp_xmit_packet+0x298/0x460 [ 70.102942][ T4701] dccp_write_xmit+0x118/0x1d0 [ 70.103740][ T4701] dccp_sendmsg+0x510/0x850 [ 70.104443][ T4701] inet_sendmsg+0x154/0x27c [ 70.105277][ T4701] __sys_sendto+0x30c/0x420 [ 70.106030][ T4701] __arm64_sys_sendto+0xe4/0x104 [ 70.106823][ T4701] invoke_syscall+0x98/0x28c [ 70.107564][ T4701] el0_svc_common+0x13c/0x258 [ 70.108302][ T4701] do_el0_svc+0x5c/0x140 [ 70.108931][ T4701] el0_svc+0x78/0x1d0 [ 70.109524][ T4701] el0t_64_sync_handler+0xcc/0xe4 [ 70.110328][ T4701] el0t_64_sync+0x1a0/0x1a4 [ 70.112532][ T4701] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.114393][ T4701] CPU: 0 PID: 4701 Comm: syz.0.23 Not tainted syzkaller #0 [ 70.115548][ T4701] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.117354][ T4701] Call trace: [ 70.117888][ T4701] dump_backtrace+0x0/0x458 [ 70.118740][ T4701] show_stack+0x2c/0x3c [ 70.119525][ T4701] __dump_stack+0x30/0x40 [ 70.120304][ T4701] dump_stack_lvl+0xf4/0x15c [ 70.121168][ T4701] dump_stack+0x1c/0x5c [ 70.121950][ T4701] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.122909][ T4701] dccp_xmit_packet+0x298/0x460 [ 70.123761][ T4701] dccp_write_xmit+0x118/0x1d0 [ 70.124586][ T4701] dccp_sendmsg+0x510/0x850 [ 70.125428][ T4701] inet_sendmsg+0x154/0x27c [ 70.126266][ T4701] __sys_sendto+0x30c/0x420 [ 70.127096][ T4701] __arm64_sys_sendto+0xe4/0x104 [ 70.128000][ T4701] invoke_syscall+0x98/0x28c [ 70.128856][ T4701] el0_svc_common+0x13c/0x258 [ 70.129675][ T4701] do_el0_svc+0x5c/0x140 [ 70.130415][ T4701] el0_svc+0x78/0x1d0 [ 70.131136][ T4701] el0t_64_sync_handler+0xcc/0xe4 [ 70.132068][ T4701] el0t_64_sync+0x1a0/0x1a4 [ 70.133680][ T4701] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.135581][ T4701] CPU: 0 PID: 4701 Comm: syz.0.23 Not tainted syzkaller #0 [ 70.136638][ T4701] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.138236][ T4701] Call trace: [ 70.138824][ T4701] dump_backtrace+0x0/0x458 [ 70.139634][ T4701] show_stack+0x2c/0x3c [ 70.140376][ T4701] __dump_stack+0x30/0x40 [ 70.141144][ T4701] dump_stack_lvl+0xf4/0x15c [ 70.142074][ T4701] dump_stack+0x1c/0x5c [ 70.142873][ T4701] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.143874][ T4701] dccp_xmit_packet+0x298/0x460 [ 70.144756][ T4701] dccp_write_xmit+0x118/0x1d0 [ 70.145541][ T4701] dccp_sendmsg+0x510/0x850 [ 70.146270][ T4701] inet_sendmsg+0x154/0x27c [ 70.147148][ T4701] __sys_sendto+0x30c/0x420 [ 70.147920][ T4701] __arm64_sys_sendto+0xe4/0x104 [ 70.148820][ T4701] invoke_syscall+0x98/0x28c [ 70.149584][ T4701] el0_svc_common+0x13c/0x258 [ 70.150369][ T4701] do_el0_svc+0x5c/0x140 [ 70.151060][ T4701] el0_svc+0x78/0x1d0 [ 70.151757][ T4701] el0t_64_sync_handler+0xcc/0xe4 [ 70.152565][ T4701] el0t_64_sync+0x1a0/0x1a4 [ 70.153987][ T4701] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.155814][ T4701] CPU: 0 PID: 4701 Comm: syz.0.23 Not tainted syzkaller #0 [ 70.157020][ T4701] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.158721][ T4701] Call trace: [ 70.159378][ T4701] dump_backtrace+0x0/0x458 [ 70.160282][ T4701] show_stack+0x2c/0x3c [ 70.161023][ T4701] __dump_stack+0x30/0x40 [ 70.161837][ T4701] dump_stack_lvl+0xf4/0x15c [ 70.162695][ T4701] dump_stack+0x1c/0x5c [ 70.163450][ T4701] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.164443][ T4701] dccp_xmit_packet+0x298/0x460 [ 70.165358][ T4701] dccp_write_xmit+0x118/0x1d0 [ 70.166185][ T4701] dccp_sendmsg+0x510/0x850 [ 70.166980][ T4701] inet_sendmsg+0x154/0x27c [ 70.167811][ T4701] __sys_sendto+0x30c/0x420 [ 70.168596][ T4701] __arm64_sys_sendto+0xe4/0x104 [ 70.169459][ T4701] invoke_syscall+0x98/0x28c [ 70.170325][ T4701] el0_svc_common+0x13c/0x258 [ 70.171215][ T4701] do_el0_svc+0x5c/0x140 [ 70.172029][ T4701] el0_svc+0x78/0x1d0 [ 70.172776][ T4701] el0t_64_sync_handler+0xcc/0xe4 [ 70.173727][ T4701] el0t_64_sync+0x1a0/0x1a4 [ 70.175520][ T4701] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.177559][ T4701] CPU: 0 PID: 4701 Comm: syz.0.23 Not tainted syzkaller #0 [ 70.178977][ T4701] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.180935][ T4701] Call trace: [ 70.181515][ T4701] dump_backtrace+0x0/0x458 [ 70.182340][ T4701] show_stack+0x2c/0x3c [ 70.183070][ T4701] __dump_stack+0x30/0x40 [ 70.183914][ T4701] dump_stack_lvl+0xf4/0x15c [ 70.184746][ T4701] dump_stack+0x1c/0x5c [ 70.185494][ T4701] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.186517][ T4701] dccp_xmit_packet+0x298/0x460 [ 70.187448][ T4701] dccp_write_xmit+0x118/0x1d0 [ 70.188386][ T4701] dccp_sendmsg+0x510/0x850 [ 70.189183][ T4701] inet_sendmsg+0x154/0x27c [ 70.190028][ T4701] __sys_sendto+0x30c/0x420 [ 70.190945][ T4701] __arm64_sys_sendto+0xe4/0x104 [ 70.191888][ T4701] invoke_syscall+0x98/0x28c [ 70.192748][ T4701] el0_svc_common+0x13c/0x258 [ 70.193577][ T4701] do_el0_svc+0x5c/0x140 [ 70.194357][ T4701] el0_svc+0x78/0x1d0 [ 70.195059][ T4701] el0t_64_sync_handler+0xcc/0xe4 [ 70.196033][ T4701] el0t_64_sync+0x1a0/0x1a4 [ 70.197340][ T4701] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.199519][ T4701] CPU: 0 PID: 4701 Comm: syz.0.23 Not tainted syzkaller #0 [ 70.200736][ T4701] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.202289][ T4701] Call trace: [ 70.202780][ T4701] dump_backtrace+0x0/0x458 [ 70.203490][ T4701] show_stack+0x2c/0x3c [ 70.204108][ T4701] __dump_stack+0x30/0x40 [ 70.204904][ T4701] dump_stack_lvl+0xf4/0x15c [ 70.205682][ T4701] dump_stack+0x1c/0x5c [ 70.206327][ T4701] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.207122][ T4701] dccp_xmit_packet+0x298/0x460 [ 70.207905][ T4701] dccp_write_xmit+0x118/0x1d0 [ 70.208683][ T4701] dccp_sendmsg+0x510/0x850 [ 70.209452][ T4701] inet_sendmsg+0x154/0x27c [ 70.210228][ T4701] __sys_sendto+0x30c/0x420 [ 70.210996][ T4701] __arm64_sys_sendto+0xe4/0x104 [ 70.211834][ T4701] invoke_syscall+0x98/0x28c [ 70.212596][ T4701] el0_svc_common+0x13c/0x258 [ 70.213349][ T4701] do_el0_svc+0x5c/0x140 [ 70.214061][ T4701] el0_svc+0x78/0x1d0 [ 70.214739][ T4701] el0t_64_sync_handler+0xcc/0xe4 [ 70.215613][ T4701] el0t_64_sync+0x1a0/0x1a4 [ 70.216541][ T4701] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.218374][ T4701] CPU: 0 PID: 4701 Comm: syz.0.23 Not tainted syzkaller #0 [ 70.219432][ T4701] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.220954][ T4701] Call trace: [ 70.221448][ T4701] dump_backtrace+0x0/0x458 [ 70.222209][ T4701] show_stack+0x2c/0x3c [ 70.222863][ T4701] __dump_stack+0x30/0x40 [ 70.223520][ T4701] dump_stack_lvl+0xf4/0x15c [ 70.224378][ T4701] dump_stack+0x1c/0x5c [ 70.225076][ T4701] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.226014][ T4701] dccp_xmit_packet+0x298/0x460 [ 70.226868][ T4701] dccp_write_xmit+0x118/0x1d0 [ 70.227594][ T4701] dccp_sendmsg+0x510/0x850 [ 70.228345][ T4701] inet_sendmsg+0x154/0x27c [ 70.229274][ T4701] __sys_sendto+0x30c/0x420 [ 70.230067][ T4701] __arm64_sys_sendto+0xe4/0x104 [ 70.231022][ T4701] invoke_syscall+0x98/0x28c [ 70.231884][ T4701] el0_svc_common+0x13c/0x258 [ 70.232797][ T4701] do_el0_svc+0x5c/0x140 [ 70.233553][ T4701] el0_svc+0x78/0x1d0 [ 70.234252][ T4701] el0t_64_sync_handler+0xcc/0xe4 [ 70.235032][ T4701] el0t_64_sync+0x1a0/0x1a4 [ 70.236232][ T4701] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.238221][ T4701] CPU: 0 PID: 4701 Comm: syz.0.23 Not tainted syzkaller #0 [ 70.239331][ T4701] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.240806][ T4701] Call trace: [ 70.241270][ T4701] dump_backtrace+0x0/0x458 [ 70.241985][ T4701] show_stack+0x2c/0x3c [ 70.242712][ T4701] __dump_stack+0x30/0x40 [ 70.243387][ T4701] dump_stack_lvl+0xf4/0x15c [ 70.244121][ T4701] dump_stack+0x1c/0x5c [ 70.244774][ T4701] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.245559][ T4701] dccp_xmit_packet+0x298/0x460 [ 70.246353][ T4701] dccp_write_xmit+0x118/0x1d0 [ 70.247100][ T4701] dccp_sendmsg+0x510/0x850 [ 70.247896][ T4701] inet_sendmsg+0x154/0x27c [ 70.248686][ T4701] __sys_sendto+0x30c/0x420 [ 70.249446][ T4701] __arm64_sys_sendto+0xe4/0x104 [ 70.250363][ T4701] invoke_syscall+0x98/0x28c [ 70.251276][ T4701] el0_svc_common+0x13c/0x258 [ 70.252204][ T4701] do_el0_svc+0x5c/0x140 [ 70.252985][ T4701] el0_svc+0x78/0x1d0 [ 70.253753][ T4701] el0t_64_sync_handler+0xcc/0xe4 [ 70.254635][ T4701] el0t_64_sync+0x1a0/0x1a4 [ 70.256232][ T4701] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.257988][ T4701] CPU: 0 PID: 4701 Comm: syz.0.23 Not tainted syzkaller #0 [ 70.259235][ T4701] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.261014][ T4701] Call trace: [ 70.261584][ T4701] dump_backtrace+0x0/0x458 [ 70.262409][ T4701] show_stack+0x2c/0x3c [ 70.263111][ T4701] __dump_stack+0x30/0x40 [ 70.263875][ T4701] dump_stack_lvl+0xf4/0x15c [ 70.264680][ T4701] dump_stack+0x1c/0x5c [ 70.265335][ T4701] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.266266][ T4701] dccp_xmit_packet+0x298/0x460 [ 70.267074][ T4701] dccp_write_xmit+0x118/0x1d0 [ 70.267918][ T4701] dccp_sendmsg+0x510/0x850 [ 70.268708][ T4701] inet_sendmsg+0x154/0x27c [ 70.269514][ T4701] __sys_sendto+0x30c/0x420 [ 70.270266][ T4701] __arm64_sys_sendto+0xe4/0x104 [ 70.271112][ T4701] invoke_syscall+0x98/0x28c [ 70.271919][ T4701] el0_svc_common+0x13c/0x258 [ 70.272731][ T4701] do_el0_svc+0x5c/0x140 [ 70.273454][ T4701] el0_svc+0x78/0x1d0 [ 70.274163][ T4701] el0t_64_sync_handler+0xcc/0xe4 [ 70.275044][ T4701] el0t_64_sync+0x1a0/0x1a4 [ 70.276207][ T4701] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.277879][ T4701] CPU: 0 PID: 4701 Comm: syz.0.23 Not tainted syzkaller #0 [ 70.279124][ T4701] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.280864][ T4701] Call trace: [ 70.281434][ T4701] dump_backtrace+0x0/0x458 [ 70.282216][ T4701] show_stack+0x2c/0x3c [ 70.282929][ T4701] __dump_stack+0x30/0x40 [ 70.283722][ T4701] dump_stack_lvl+0xf4/0x15c [ 70.284594][ T4701] dump_stack+0x1c/0x5c [ 70.285428][ T4701] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.286533][ T4701] dccp_xmit_packet+0x298/0x460 [ 70.287532][ T4701] dccp_write_xmit+0x118/0x1d0 [ 70.288479][ T4701] dccp_sendmsg+0x510/0x850 [ 70.289378][ T4701] inet_sendmsg+0x154/0x27c [ 70.290210][ T4701] __sys_sendto+0x30c/0x420 [ 70.291014][ T4701] __arm64_sys_sendto+0xe4/0x104 [ 70.291961][ T4701] invoke_syscall+0x98/0x28c [ 70.292806][ T4701] el0_svc_common+0x13c/0x258 [ 70.293711][ T4701] do_el0_svc+0x5c/0x140 [ 70.294550][ T4701] el0_svc+0x78/0x1d0 [ 70.295227][ T4701] el0t_64_sync_handler+0xcc/0xe4 [ 70.296109][ T4701] el0t_64_sync+0x1a0/0x1a4 [ 70.297511][ T4701] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.299544][ T4701] CPU: 0 PID: 4701 Comm: syz.0.23 Not tainted syzkaller #0 [ 70.300643][ T4701] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.302149][ T4701] Call trace: [ 70.302622][ T4701] dump_backtrace+0x0/0x458 [ 70.303258][ T4701] show_stack+0x2c/0x3c [ 70.303861][ T4701] __dump_stack+0x30/0x40 [ 70.304551][ T4701] dump_stack_lvl+0xf4/0x15c [ 70.305239][ T4701] dump_stack+0x1c/0x5c [ 70.305863][ T4701] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.306743][ T4701] dccp_xmit_packet+0x298/0x460 [ 70.307531][ T4701] dccp_write_xmit+0x118/0x1d0 [ 70.308304][ T4701] dccp_sendmsg+0x510/0x850 [ 70.309102][ T4701] inet_sendmsg+0x154/0x27c [ 70.309801][ T4701] __sys_sendto+0x30c/0x420 [ 70.310547][ T4701] __arm64_sys_sendto+0xe4/0x104 [ 70.311384][ T4701] invoke_syscall+0x98/0x28c [ 70.312191][ T4701] el0_svc_common+0x13c/0x258 [ 70.312977][ T4701] do_el0_svc+0x5c/0x140 [ 70.313619][ T4701] el0_svc+0x78/0x1d0 [ 70.314270][ T4701] el0t_64_sync_handler+0xcc/0xe4 [ 70.315135][ T4701] el0t_64_sync+0x1a0/0x1a4 [ 70.316092][ T4701] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.317986][ T4701] CPU: 0 PID: 4701 Comm: syz.0.23 Not tainted syzkaller #0 [ 70.319228][ T4701] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.320915][ T4701] Call trace: [ 70.321491][ T4701] dump_backtrace+0x0/0x458 [ 70.322263][ T4701] show_stack+0x2c/0x3c [ 70.322955][ T4701] __dump_stack+0x30/0x40 [ 70.323720][ T4701] dump_stack_lvl+0xf4/0x15c [ 70.324560][ T4701] dump_stack+0x1c/0x5c [ 70.325284][ T4701] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.326230][ T4701] dccp_xmit_packet+0x298/0x460 [ 70.327075][ T4701] dccp_write_xmit+0x118/0x1d0 [ 70.327977][ T4701] dccp_sendmsg+0x510/0x850 [ 70.328828][ T4701] inet_sendmsg+0x154/0x27c [ 70.329579][ T4701] __sys_sendto+0x30c/0x420 [ 70.330316][ T4701] __arm64_sys_sendto+0xe4/0x104 [ 70.331172][ T4701] invoke_syscall+0x98/0x28c [ 70.331968][ T4701] el0_svc_common+0x13c/0x258 [ 70.332800][ T4701] do_el0_svc+0x5c/0x140 [ 70.333532][ T4701] el0_svc+0x78/0x1d0 [ 70.334292][ T4701] el0t_64_sync_handler+0xcc/0xe4 [ 70.335174][ T4701] el0t_64_sync+0x1a0/0x1a4 [ 70.336499][ T4701] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.338322][ T4701] CPU: 0 PID: 4701 Comm: syz.0.23 Not tainted syzkaller #0 [ 70.339468][ T4701] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.341181][ T4701] Call trace: [ 70.341740][ T4701] dump_backtrace+0x0/0x458 [ 70.342469][ T4701] show_stack+0x2c/0x3c [ 70.343070][ T4701] __dump_stack+0x30/0x40 [ 70.343772][ T4701] dump_stack_lvl+0xf4/0x15c [ 70.344476][ T4701] dump_stack+0x1c/0x5c [ 70.345102][ T4701] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.345937][ T4701] dccp_xmit_packet+0x298/0x460 [ 70.346633][ T4701] dccp_write_xmit+0x118/0x1d0 [ 70.347314][ T4701] dccp_sendmsg+0x510/0x850 [ 70.348077][ T4701] inet_sendmsg+0x154/0x27c [ 70.348886][ T4701] __sys_sendto+0x30c/0x420 [ 70.349826][ T4701] __arm64_sys_sendto+0xe4/0x104 [ 70.350650][ T4701] invoke_syscall+0x98/0x28c [ 70.351472][ T4701] el0_svc_common+0x13c/0x258 [ 70.352324][ T4701] do_el0_svc+0x5c/0x140 [ 70.353137][ T4701] el0_svc+0x78/0x1d0 [ 70.353910][ T4701] el0t_64_sync_handler+0xcc/0xe4 [ 70.354894][ T4701] el0t_64_sync+0x1a0/0x1a4 [ 70.366864][ T4703] dccp_xmit_packet: Payload too large (65475) for featneg. [ 70.374275][ T4703] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.376011][ T4703] CPU: 0 PID: 4703 Comm: syz.0.24 Not tainted syzkaller #0 [ 70.377166][ T4703] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.378858][ T4703] Call trace: [ 70.379411][ T4703] dump_backtrace+0x0/0x458 [ 70.380346][ T4703] show_stack+0x2c/0x3c [ 70.381159][ T4703] __dump_stack+0x30/0x40 [ 70.381916][ T4703] dump_stack_lvl+0xf4/0x15c [ 70.382715][ T4703] dump_stack+0x1c/0x5c [ 70.383417][ T4703] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.384317][ T4703] dccp_xmit_packet+0x298/0x460 [ 70.385170][ T4703] dccp_write_xmit+0x118/0x1d0 [ 70.386038][ T4703] dccp_sendmsg+0x510/0x850 [ 70.386885][ T4703] inet_sendmsg+0x154/0x27c [ 70.387672][ T4703] __sys_sendto+0x30c/0x420 [ 70.388603][ T4703] __arm64_sys_sendto+0xe4/0x104 [ 70.389600][ T4703] invoke_syscall+0x98/0x28c [ 70.390461][ T4703] el0_svc_common+0x13c/0x258 [ 70.391288][ T4703] do_el0_svc+0x5c/0x140 [ 70.392100][ T4703] el0_svc+0x78/0x1d0 [ 70.392872][ T4703] el0t_64_sync_handler+0xcc/0xe4 [ 70.393775][ T4703] el0t_64_sync+0x1a0/0x1a4 [ 70.394906][ T4703] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.396691][ T4703] CPU: 0 PID: 4703 Comm: syz.0.24 Not tainted syzkaller #0 [ 70.397958][ T4703] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.399769][ T4703] Call trace: [ 70.400336][ T4703] dump_backtrace+0x0/0x458 [ 70.401177][ T4703] show_stack+0x2c/0x3c [ 70.401985][ T4703] __dump_stack+0x30/0x40 [ 70.402775][ T4703] dump_stack_lvl+0xf4/0x15c [ 70.403544][ T4703] dump_stack+0x1c/0x5c [ 70.404234][ T4703] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.405191][ T4703] dccp_xmit_packet+0x298/0x460 [ 70.406021][ T4703] dccp_write_xmit+0x118/0x1d0 [ 70.406812][ T4703] dccp_sendmsg+0x510/0x850 [ 70.407572][ T4703] inet_sendmsg+0x154/0x27c [ 70.408357][ T4703] __sys_sendto+0x30c/0x420 [ 70.409147][ T4703] __arm64_sys_sendto+0xe4/0x104 [ 70.409955][ T4703] invoke_syscall+0x98/0x28c [ 70.410800][ T4703] el0_svc_common+0x13c/0x258 [ 70.411582][ T4703] do_el0_svc+0x5c/0x140 [ 70.412273][ T4703] el0_svc+0x78/0x1d0 [ 70.412932][ T4703] el0t_64_sync_handler+0xcc/0xe4 [ 70.413790][ T4703] el0t_64_sync+0x1a0/0x1a4 [ 70.415632][ T4703] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.417488][ T4703] CPU: 0 PID: 4703 Comm: syz.0.24 Not tainted syzkaller #0 [ 70.418697][ T4703] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.420351][ T4703] Call trace: [ 70.420898][ T4703] dump_backtrace+0x0/0x458 [ 70.421717][ T4703] show_stack+0x2c/0x3c [ 70.422430][ T4703] __dump_stack+0x30/0x40 [ 70.423291][ T4703] dump_stack_lvl+0xf4/0x15c [ 70.424134][ T4703] dump_stack+0x1c/0x5c [ 70.424891][ T4703] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.425891][ T4703] dccp_xmit_packet+0x298/0x460 [ 70.426768][ T4703] dccp_write_xmit+0x118/0x1d0 [ 70.427576][ T4703] dccp_sendmsg+0x510/0x850 [ 70.428394][ T4703] inet_sendmsg+0x154/0x27c [ 70.429242][ T4703] __sys_sendto+0x30c/0x420 [ 70.430028][ T4703] __arm64_sys_sendto+0xe4/0x104 [ 70.430842][ T4703] invoke_syscall+0x98/0x28c [ 70.431767][ T4703] el0_svc_common+0x13c/0x258 [ 70.432572][ T4703] do_el0_svc+0x5c/0x140 [ 70.433266][ T4703] el0_svc+0x78/0x1d0 [ 70.433928][ T4703] el0t_64_sync_handler+0xcc/0xe4 [ 70.434751][ T4703] el0t_64_sync+0x1a0/0x1a4 [ 70.435997][ T4703] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.437847][ T4703] CPU: 0 PID: 4703 Comm: syz.0.24 Not tainted syzkaller #0 [ 70.439091][ T4703] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.440786][ T4703] Call trace: [ 70.441340][ T4703] dump_backtrace+0x0/0x458 [ 70.442127][ T4703] show_stack+0x2c/0x3c [ 70.442846][ T4703] __dump_stack+0x30/0x40 [ 70.443599][ T4703] dump_stack_lvl+0xf4/0x15c [ 70.444415][ T4703] dump_stack+0x1c/0x5c [ 70.445125][ T4703] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.446118][ T4703] dccp_xmit_packet+0x298/0x460 [ 70.446939][ T4703] dccp_write_xmit+0x118/0x1d0 [ 70.447815][ T4703] dccp_sendmsg+0x510/0x850 [ 70.448617][ T4703] inet_sendmsg+0x154/0x27c [ 70.449327][ T4703] __sys_sendto+0x30c/0x420 [ 70.450103][ T4703] __arm64_sys_sendto+0xe4/0x104 [ 70.450898][ T4703] invoke_syscall+0x98/0x28c [ 70.451710][ T4703] el0_svc_common+0x13c/0x258 [ 70.452573][ T4703] do_el0_svc+0x5c/0x140 [ 70.453231][ T4703] el0_svc+0x78/0x1d0 [ 70.453894][ T4703] el0t_64_sync_handler+0xcc/0xe4 [ 70.454760][ T4703] el0t_64_sync+0x1a0/0x1a4 [ 70.456130][ T4703] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.457868][ T4703] CPU: 0 PID: 4703 Comm: syz.0.24 Not tainted syzkaller #0 [ 70.459092][ T4703] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.460884][ T4703] Call trace: [ 70.461493][ T4703] dump_backtrace+0x0/0x458 [ 70.462322][ T4703] show_stack+0x2c/0x3c [ 70.463042][ T4703] __dump_stack+0x30/0x40 [ 70.463833][ T4703] dump_stack_lvl+0xf4/0x15c [ 70.464653][ T4703] dump_stack+0x1c/0x5c [ 70.465310][ T4703] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.466254][ T4703] dccp_xmit_packet+0x298/0x460 [ 70.467180][ T4703] dccp_write_xmit+0x118/0x1d0 [ 70.468074][ T4703] dccp_sendmsg+0x510/0x850 [ 70.468948][ T4703] inet_sendmsg+0x154/0x27c [ 70.469762][ T4703] __sys_sendto+0x30c/0x420 [ 70.470545][ T4703] __arm64_sys_sendto+0xe4/0x104 [ 70.471357][ T4703] invoke_syscall+0x98/0x28c [ 70.472100][ T4703] el0_svc_common+0x13c/0x258 [ 70.472907][ T4703] do_el0_svc+0x5c/0x140 [ 70.473630][ T4703] el0_svc+0x78/0x1d0 [ 70.474274][ T4703] el0t_64_sync_handler+0xcc/0xe4 [ 70.475087][ T4703] el0t_64_sync+0x1a0/0x1a4 [ 70.476183][ T4703] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.477945][ T4703] CPU: 0 PID: 4703 Comm: syz.0.24 Not tainted syzkaller #0 [ 70.479266][ T4703] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.480944][ T4703] Call trace: [ 70.481477][ T4703] dump_backtrace+0x0/0x458 [ 70.482282][ T4703] show_stack+0x2c/0x3c [ 70.482991][ T4703] __dump_stack+0x30/0x40 [ 70.483723][ T4703] dump_stack_lvl+0xf4/0x15c [ 70.484475][ T4703] dump_stack+0x1c/0x5c [ 70.485229][ T4703] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.486243][ T4703] dccp_xmit_packet+0x298/0x460 [ 70.487128][ T4703] dccp_write_xmit+0x118/0x1d0 [ 70.488003][ T4703] dccp_sendmsg+0x510/0x850 [ 70.488781][ T4703] inet_sendmsg+0x154/0x27c [ 70.489573][ T4703] __sys_sendto+0x30c/0x420 [ 70.490402][ T4703] __arm64_sys_sendto+0xe4/0x104 [ 70.491280][ T4703] invoke_syscall+0x98/0x28c [ 70.492174][ T4703] el0_svc_common+0x13c/0x258 [ 70.493071][ T4703] do_el0_svc+0x5c/0x140 [ 70.493842][ T4703] el0_svc+0x78/0x1d0 [ 70.494570][ T4703] el0t_64_sync_handler+0xcc/0xe4 [ 70.495400][ T4703] el0t_64_sync+0x1a0/0x1a4 [ 70.497151][ T4703] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.499199][ T4703] CPU: 0 PID: 4703 Comm: syz.0.24 Not tainted syzkaller #0 [ 70.500303][ T4703] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.501905][ T4703] Call trace: [ 70.502457][ T4703] dump_backtrace+0x0/0x458 [ 70.503221][ T4703] show_stack+0x2c/0x3c [ 70.503997][ T4703] __dump_stack+0x30/0x40 [ 70.504676][ T4703] dump_stack_lvl+0xf4/0x15c [ 70.505438][ T4703] dump_stack+0x1c/0x5c [ 70.506190][ T4703] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.507094][ T4703] dccp_xmit_packet+0x298/0x460 [ 70.507904][ T4703] dccp_write_xmit+0x118/0x1d0 [ 70.508811][ T4703] dccp_sendmsg+0x510/0x850 [ 70.509643][ T4703] inet_sendmsg+0x154/0x27c [ 70.510487][ T4703] __sys_sendto+0x30c/0x420 [ 70.511322][ T4703] __arm64_sys_sendto+0xe4/0x104 [ 70.512191][ T4703] invoke_syscall+0x98/0x28c [ 70.513093][ T4703] el0_svc_common+0x13c/0x258 [ 70.513974][ T4703] do_el0_svc+0x5c/0x140 [ 70.514753][ T4703] el0_svc+0x78/0x1d0 [ 70.515497][ T4703] el0t_64_sync_handler+0xcc/0xe4 [ 70.516452][ T4703] el0t_64_sync+0x1a0/0x1a4 [ 70.517490][ T4703] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.519910][ T4703] CPU: 0 PID: 4703 Comm: syz.0.24 Not tainted syzkaller #0 [ 70.521060][ T4703] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.522682][ T4703] Call trace: [ 70.523147][ T4703] dump_backtrace+0x0/0x458 [ 70.523833][ T4703] show_stack+0x2c/0x3c [ 70.524471][ T4703] __dump_stack+0x30/0x40 [ 70.525170][ T4703] dump_stack_lvl+0xf4/0x15c [ 70.525862][ T4703] dump_stack+0x1c/0x5c [ 70.526505][ T4703] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.527393][ T4703] dccp_xmit_packet+0x298/0x460 [ 70.528286][ T4703] dccp_write_xmit+0x118/0x1d0 [ 70.529138][ T4703] dccp_sendmsg+0x510/0x850 [ 70.529908][ T4703] inet_sendmsg+0x154/0x27c [ 70.530820][ T4703] __sys_sendto+0x30c/0x420 [ 70.531541][ T4703] __arm64_sys_sendto+0xe4/0x104 [ 70.532324][ T4703] invoke_syscall+0x98/0x28c [ 70.533035][ T4703] el0_svc_common+0x13c/0x258 [ 70.533908][ T4703] do_el0_svc+0x5c/0x140 [ 70.534666][ T4703] el0_svc+0x78/0x1d0 [ 70.535425][ T4703] el0t_64_sync_handler+0xcc/0xe4 [ 70.536360][ T4703] el0t_64_sync+0x1a0/0x1a4 [ 70.537335][ T4703] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.539332][ T4703] CPU: 0 PID: 4703 Comm: syz.0.24 Not tainted syzkaller #0 [ 70.540496][ T4703] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.542095][ T4703] Call trace: [ 70.542639][ T4703] dump_backtrace+0x0/0x458 [ 70.543400][ T4703] show_stack+0x2c/0x3c [ 70.544031][ T4703] __dump_stack+0x30/0x40 [ 70.544655][ T4703] dump_stack_lvl+0xf4/0x15c [ 70.545361][ T4703] dump_stack+0x1c/0x5c [ 70.546042][ T4703] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.546870][ T4703] dccp_xmit_packet+0x298/0x460 [ 70.547731][ T4703] dccp_write_xmit+0x118/0x1d0 [ 70.548568][ T4703] dccp_sendmsg+0x510/0x850 [ 70.549475][ T4703] inet_sendmsg+0x154/0x27c [ 70.550256][ T4703] __sys_sendto+0x30c/0x420 [ 70.551016][ T4703] __arm64_sys_sendto+0xe4/0x104 [ 70.551884][ T4703] invoke_syscall+0x98/0x28c [ 70.552682][ T4703] el0_svc_common+0x13c/0x258 [ 70.553423][ T4703] do_el0_svc+0x5c/0x140 [ 70.554169][ T4703] el0_svc+0x78/0x1d0 [ 70.554861][ T4703] el0t_64_sync_handler+0xcc/0xe4 [ 70.555802][ T4703] el0t_64_sync+0x1a0/0x1a4 [ 70.556793][ T4703] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.558666][ T4703] CPU: 0 PID: 4703 Comm: syz.0.24 Not tainted syzkaller #0 [ 70.559846][ T4703] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.561506][ T4703] Call trace: [ 70.562011][ T4703] dump_backtrace+0x0/0x458 [ 70.562648][ T4703] show_stack+0x2c/0x3c [ 70.563246][ T4703] __dump_stack+0x30/0x40 [ 70.563972][ T4703] dump_stack_lvl+0xf4/0x15c [ 70.564765][ T4703] dump_stack+0x1c/0x5c [ 70.565489][ T4703] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.566484][ T4703] dccp_xmit_packet+0x298/0x460 [ 70.567322][ T4703] dccp_write_xmit+0x118/0x1d0 [ 70.568184][ T4703] dccp_sendmsg+0x510/0x850 [ 70.568991][ T4703] inet_sendmsg+0x154/0x27c [ 70.569842][ T4703] __sys_sendto+0x30c/0x420 [ 70.570653][ T4703] __arm64_sys_sendto+0xe4/0x104 [ 70.571518][ T4703] invoke_syscall+0x98/0x28c [ 70.572339][ T4703] el0_svc_common+0x13c/0x258 [ 70.573168][ T4703] do_el0_svc+0x5c/0x140 [ 70.573978][ T4703] el0_svc+0x78/0x1d0 [ 70.574654][ T4703] el0t_64_sync_handler+0xcc/0xe4 [ 70.575532][ T4703] el0t_64_sync+0x1a0/0x1a4 [ 70.576764][ T4703] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.578427][ T4703] CPU: 0 PID: 4703 Comm: syz.0.24 Not tainted syzkaller #0 [ 70.579572][ T4703] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.581155][ T4703] Call trace: [ 70.581749][ T4703] dump_backtrace+0x0/0x458 [ 70.582419][ T4703] show_stack+0x2c/0x3c [ 70.583097][ T4703] __dump_stack+0x30/0x40 [ 70.583853][ T4703] dump_stack_lvl+0xf4/0x15c [ 70.584562][ T4703] dump_stack+0x1c/0x5c [ 70.585200][ T4703] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.586133][ T4703] dccp_xmit_packet+0x298/0x460 [ 70.586861][ T4703] dccp_write_xmit+0x118/0x1d0 [ 70.587579][ T4703] dccp_sendmsg+0x510/0x850 [ 70.588270][ T4703] inet_sendmsg+0x154/0x27c [ 70.589086][ T4703] __sys_sendto+0x30c/0x420 [ 70.589908][ T4703] __arm64_sys_sendto+0xe4/0x104 [ 70.590863][ T4703] invoke_syscall+0x98/0x28c [ 70.591583][ T4703] el0_svc_common+0x13c/0x258 [ 70.592313][ T4703] do_el0_svc+0x5c/0x140 [ 70.593044][ T4703] el0_svc+0x78/0x1d0 [ 70.593745][ T4703] el0t_64_sync_handler+0xcc/0xe4 [ 70.594647][ T4703] el0t_64_sync+0x1a0/0x1a4 [ 70.595614][ T4703] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.597286][ T4703] CPU: 0 PID: 4703 Comm: syz.0.24 Not tainted syzkaller #0 [ 70.598550][ T4703] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.600341][ T4703] Call trace: [ 70.600969][ T4703] dump_backtrace+0x0/0x458 [ 70.601755][ T4703] show_stack+0x2c/0x3c [ 70.602473][ T4703] __dump_stack+0x30/0x40 [ 70.603229][ T4703] dump_stack_lvl+0xf4/0x15c [ 70.603962][ T4703] dump_stack+0x1c/0x5c [ 70.604695][ T4703] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.605584][ T4703] dccp_xmit_packet+0x298/0x460 [ 70.606494][ T4703] dccp_write_xmit+0x118/0x1d0 [ 70.607318][ T4703] dccp_sendmsg+0x510/0x850 [ 70.608027][ T4703] inet_sendmsg+0x154/0x27c [ 70.608780][ T4703] __sys_sendto+0x30c/0x420 [ 70.609535][ T4703] __arm64_sys_sendto+0xe4/0x104 [ 70.610549][ T4703] invoke_syscall+0x98/0x28c [ 70.611387][ T4703] el0_svc_common+0x13c/0x258 [ 70.612277][ T4703] do_el0_svc+0x5c/0x140 [ 70.612927][ T4703] el0_svc+0x78/0x1d0 [ 70.613633][ T4703] el0t_64_sync_handler+0xcc/0xe4 [ 70.614499][ T4703] el0t_64_sync+0x1a0/0x1a4 [ 70.615528][ T4703] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.617442][ T4703] CPU: 0 PID: 4703 Comm: syz.0.24 Not tainted syzkaller #0 [ 70.618675][ T4703] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.620518][ T4703] Call trace: [ 70.621104][ T4703] dump_backtrace+0x0/0x458 [ 70.621906][ T4703] show_stack+0x2c/0x3c [ 70.622648][ T4703] __dump_stack+0x30/0x40 [ 70.623554][ T4703] dump_stack_lvl+0xf4/0x15c [ 70.624465][ T4703] dump_stack+0x1c/0x5c [ 70.625211][ T4703] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.626140][ T4703] dccp_xmit_packet+0x298/0x460 [ 70.626987][ T4703] dccp_write_xmit+0x118/0x1d0 [ 70.627825][ T4703] dccp_sendmsg+0x510/0x850 [ 70.628660][ T4703] inet_sendmsg+0x154/0x27c [ 70.629508][ T4703] __sys_sendto+0x30c/0x420 [ 70.630316][ T4703] __arm64_sys_sendto+0xe4/0x104 [ 70.631108][ T4703] invoke_syscall+0x98/0x28c [ 70.631842][ T4703] el0_svc_common+0x13c/0x258 [ 70.632742][ T4703] do_el0_svc+0x5c/0x140 [ 70.633599][ T4703] el0_svc+0x78/0x1d0 [ 70.634331][ T4703] el0t_64_sync_handler+0xcc/0xe4 [ 70.635272][ T4703] el0t_64_sync+0x1a0/0x1a4 [ 70.646861][ T4705] dccp_xmit_packet: Payload too large (65475) for featneg. [ 70.654333][ T4705] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.656080][ T4705] CPU: 0 PID: 4705 Comm: syz.0.25 Not tainted syzkaller #0 [ 70.657247][ T4705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.658867][ T4705] Call trace: [ 70.659453][ T4705] dump_backtrace+0x0/0x458 [ 70.660245][ T4705] show_stack+0x2c/0x3c [ 70.660918][ T4705] __dump_stack+0x30/0x40 [ 70.661583][ T4705] dump_stack_lvl+0xf4/0x15c [ 70.662352][ T4705] dump_stack+0x1c/0x5c [ 70.663083][ T4705] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.663984][ T4705] dccp_xmit_packet+0x298/0x460 [ 70.664815][ T4705] dccp_write_xmit+0x118/0x1d0 [ 70.665600][ T4705] dccp_sendmsg+0x510/0x850 [ 70.666354][ T4705] inet_sendmsg+0x154/0x27c [ 70.667128][ T4705] __sys_sendto+0x30c/0x420 [ 70.667889][ T4705] __arm64_sys_sendto+0xe4/0x104 [ 70.668709][ T4705] invoke_syscall+0x98/0x28c [ 70.669507][ T4705] el0_svc_common+0x13c/0x258 [ 70.670286][ T4705] do_el0_svc+0x5c/0x140 [ 70.671005][ T4705] el0_svc+0x78/0x1d0 [ 70.671677][ T4705] el0t_64_sync_handler+0xcc/0xe4 [ 70.672548][ T4705] el0t_64_sync+0x1a0/0x1a4 [ 70.673647][ T4705] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.675697][ T4705] CPU: 0 PID: 4705 Comm: syz.0.25 Not tainted syzkaller #0 [ 70.676925][ T4705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.678590][ T4705] Call trace: [ 70.679138][ T4705] dump_backtrace+0x0/0x458 [ 70.679897][ T4705] show_stack+0x2c/0x3c [ 70.680614][ T4705] __dump_stack+0x30/0x40 [ 70.681384][ T4705] dump_stack_lvl+0xf4/0x15c [ 70.682185][ T4705] dump_stack+0x1c/0x5c [ 70.682892][ T4705] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.683854][ T4705] dccp_xmit_packet+0x298/0x460 [ 70.684643][ T4705] dccp_write_xmit+0x118/0x1d0 [ 70.685440][ T4705] dccp_sendmsg+0x510/0x850 [ 70.686161][ T4705] inet_sendmsg+0x154/0x27c [ 70.686970][ T4705] __sys_sendto+0x30c/0x420 [ 70.687806][ T4705] __arm64_sys_sendto+0xe4/0x104 [ 70.688736][ T4705] invoke_syscall+0x98/0x28c [ 70.689582][ T4705] el0_svc_common+0x13c/0x258 [ 70.690448][ T4705] do_el0_svc+0x5c/0x140 [ 70.691204][ T4705] el0_svc+0x78/0x1d0 [ 70.691871][ T4705] el0t_64_sync_handler+0xcc/0xe4 [ 70.692749][ T4705] el0t_64_sync+0x1a0/0x1a4 [ 70.693799][ T4705] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.695623][ T4705] CPU: 0 PID: 4705 Comm: syz.0.25 Not tainted syzkaller #0 [ 70.696749][ T4705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.698375][ T4705] Call trace: [ 70.698945][ T4705] dump_backtrace+0x0/0x458 [ 70.699698][ T4705] show_stack+0x2c/0x3c [ 70.700438][ T4705] __dump_stack+0x30/0x40 [ 70.701203][ T4705] dump_stack_lvl+0xf4/0x15c [ 70.702035][ T4705] dump_stack+0x1c/0x5c [ 70.702758][ T4705] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.703782][ T4705] dccp_xmit_packet+0x298/0x460 [ 70.704697][ T4705] dccp_write_xmit+0x118/0x1d0 [ 70.705583][ T4705] dccp_sendmsg+0x510/0x850 [ 70.706365][ T4705] inet_sendmsg+0x154/0x27c [ 70.707286][ T4705] __sys_sendto+0x30c/0x420 [ 70.708173][ T4705] __arm64_sys_sendto+0xe4/0x104 [ 70.709108][ T4705] invoke_syscall+0x98/0x28c [ 70.709881][ T4705] el0_svc_common+0x13c/0x258 [ 70.710668][ T4705] do_el0_svc+0x5c/0x140 [ 70.711412][ T4705] el0_svc+0x78/0x1d0 [ 70.712136][ T4705] el0t_64_sync_handler+0xcc/0xe4 [ 70.713046][ T4705] el0t_64_sync+0x1a0/0x1a4 [ 70.714840][ T4705] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.716653][ T4705] CPU: 0 PID: 4705 Comm: syz.0.25 Not tainted syzkaller #0 [ 70.717855][ T4705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.719751][ T4705] Call trace: [ 70.720332][ T4705] dump_backtrace+0x0/0x458 [ 70.721060][ T4705] show_stack+0x2c/0x3c [ 70.721768][ T4705] __dump_stack+0x30/0x40 [ 70.722497][ T4705] dump_stack_lvl+0xf4/0x15c [ 70.723292][ T4705] dump_stack+0x1c/0x5c [ 70.723966][ T4705] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.724895][ T4705] dccp_xmit_packet+0x298/0x460 [ 70.725745][ T4705] dccp_write_xmit+0x118/0x1d0 [ 70.726574][ T4705] dccp_sendmsg+0x510/0x850 [ 70.727362][ T4705] inet_sendmsg+0x154/0x27c [ 70.728066][ T4705] __sys_sendto+0x30c/0x420 [ 70.728900][ T4705] __arm64_sys_sendto+0xe4/0x104 [ 70.729750][ T4705] invoke_syscall+0x98/0x28c [ 70.730524][ T4705] el0_svc_common+0x13c/0x258 [ 70.731384][ T4705] do_el0_svc+0x5c/0x140 [ 70.732133][ T4705] el0_svc+0x78/0x1d0 [ 70.732873][ T4705] el0t_64_sync_handler+0xcc/0xe4 [ 70.733990][ T4705] el0t_64_sync+0x1a0/0x1a4 [ 70.735230][ T4705] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.737038][ T4705] CPU: 0 PID: 4705 Comm: syz.0.25 Not tainted syzkaller #0 [ 70.738250][ T4705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.739963][ T4705] Call trace: [ 70.740620][ T4705] dump_backtrace+0x0/0x458 [ 70.741525][ T4705] show_stack+0x2c/0x3c [ 70.742331][ T4705] __dump_stack+0x30/0x40 [ 70.743084][ T4705] dump_stack_lvl+0xf4/0x15c [ 70.743850][ T4705] dump_stack+0x1c/0x5c [ 70.744656][ T4705] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.745755][ T4705] dccp_xmit_packet+0x298/0x460 [ 70.746706][ T4705] dccp_write_xmit+0x118/0x1d0 [ 70.747594][ T4705] dccp_sendmsg+0x510/0x850 [ 70.748432][ T4705] inet_sendmsg+0x154/0x27c [ 70.749228][ T4705] __sys_sendto+0x30c/0x420 [ 70.750002][ T4705] __arm64_sys_sendto+0xe4/0x104 [ 70.750982][ T4705] invoke_syscall+0x98/0x28c [ 70.751905][ T4705] el0_svc_common+0x13c/0x258 [ 70.752796][ T4705] do_el0_svc+0x5c/0x140 [ 70.753547][ T4705] el0_svc+0x78/0x1d0 [ 70.754202][ T4705] el0t_64_sync_handler+0xcc/0xe4 [ 70.755106][ T4705] el0t_64_sync+0x1a0/0x1a4 [ 70.756636][ T4705] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.758259][ T4705] CPU: 0 PID: 4705 Comm: syz.0.25 Not tainted syzkaller #0 [ 70.759365][ T4705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.761070][ T4705] Call trace: [ 70.761666][ T4705] dump_backtrace+0x0/0x458 [ 70.762469][ T4705] show_stack+0x2c/0x3c [ 70.763143][ T4705] __dump_stack+0x30/0x40 [ 70.763923][ T4705] dump_stack_lvl+0xf4/0x15c [ 70.764782][ T4705] dump_stack+0x1c/0x5c [ 70.765609][ T4705] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.766562][ T4705] dccp_xmit_packet+0x298/0x460 [ 70.767564][ T4705] dccp_write_xmit+0x118/0x1d0 [ 70.768477][ T4705] dccp_sendmsg+0x510/0x850 [ 70.769292][ T4705] inet_sendmsg+0x154/0x27c [ 70.770108][ T4705] __sys_sendto+0x30c/0x420 [ 70.771040][ T4705] __arm64_sys_sendto+0xe4/0x104 [ 70.771974][ T4705] invoke_syscall+0x98/0x28c [ 70.772790][ T4705] el0_svc_common+0x13c/0x258 [ 70.773575][ T4705] do_el0_svc+0x5c/0x140 [ 70.774325][ T4705] el0_svc+0x78/0x1d0 [ 70.775028][ T4705] el0t_64_sync_handler+0xcc/0xe4 [ 70.775962][ T4705] el0t_64_sync+0x1a0/0x1a4 [ 70.777093][ T4705] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.778992][ T4705] CPU: 0 PID: 4705 Comm: syz.0.25 Not tainted syzkaller #0 [ 70.780159][ T4705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.781762][ T4705] Call trace: [ 70.782293][ T4705] dump_backtrace+0x0/0x458 [ 70.783026][ T4705] show_stack+0x2c/0x3c [ 70.783698][ T4705] __dump_stack+0x30/0x40 [ 70.784429][ T4705] dump_stack_lvl+0xf4/0x15c [ 70.785108][ T4705] dump_stack+0x1c/0x5c [ 70.785754][ T4705] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.786583][ T4705] dccp_xmit_packet+0x298/0x460 [ 70.787370][ T4705] dccp_write_xmit+0x118/0x1d0 [ 70.788133][ T4705] dccp_sendmsg+0x510/0x850 [ 70.788891][ T4705] inet_sendmsg+0x154/0x27c [ 70.789692][ T4705] __sys_sendto+0x30c/0x420 [ 70.790541][ T4705] __arm64_sys_sendto+0xe4/0x104 [ 70.791472][ T4705] invoke_syscall+0x98/0x28c [ 70.792332][ T4705] el0_svc_common+0x13c/0x258 [ 70.793163][ T4705] do_el0_svc+0x5c/0x140 [ 70.793882][ T4705] el0_svc+0x78/0x1d0 [ 70.794593][ T4705] el0t_64_sync_handler+0xcc/0xe4 [ 70.795446][ T4705] el0t_64_sync+0x1a0/0x1a4 [ 70.796384][ T4705] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.798493][ T4705] CPU: 0 PID: 4705 Comm: syz.0.25 Not tainted syzkaller #0 [ 70.799878][ T4705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.801644][ T4705] Call trace: [ 70.802221][ T4705] dump_backtrace+0x0/0x458 [ 70.802912][ T4705] show_stack+0x2c/0x3c [ 70.803620][ T4705] __dump_stack+0x30/0x40 [ 70.804353][ T4705] dump_stack_lvl+0xf4/0x15c [ 70.805129][ T4705] dump_stack+0x1c/0x5c [ 70.805796][ T4705] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.806701][ T4705] dccp_xmit_packet+0x298/0x460 [ 70.807524][ T4705] dccp_write_xmit+0x118/0x1d0 [ 70.808412][ T4705] dccp_sendmsg+0x510/0x850 [ 70.809328][ T4705] inet_sendmsg+0x154/0x27c [ 70.810187][ T4705] __sys_sendto+0x30c/0x420 [ 70.810947][ T4705] __arm64_sys_sendto+0xe4/0x104 [ 70.811934][ T4705] invoke_syscall+0x98/0x28c [ 70.812882][ T4705] el0_svc_common+0x13c/0x258 [ 70.813742][ T4705] do_el0_svc+0x5c/0x140 [ 70.814519][ T4705] el0_svc+0x78/0x1d0 [ 70.815296][ T4705] el0t_64_sync_handler+0xcc/0xe4 [ 70.816250][ T4705] el0t_64_sync+0x1a0/0x1a4 [ 70.817652][ T4705] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.820483][ T4705] CPU: 0 PID: 4705 Comm: syz.0.25 Not tainted syzkaller #0 [ 70.821654][ T4705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.823295][ T4705] Call trace: [ 70.823853][ T4705] dump_backtrace+0x0/0x458 [ 70.824567][ T4705] show_stack+0x2c/0x3c [ 70.825229][ T4705] __dump_stack+0x30/0x40 [ 70.825931][ T4705] dump_stack_lvl+0xf4/0x15c [ 70.826644][ T4705] dump_stack+0x1c/0x5c [ 70.827411][ T4705] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.828458][ T4705] dccp_xmit_packet+0x298/0x460 [ 70.829369][ T4705] dccp_write_xmit+0x118/0x1d0 [ 70.830181][ T4705] dccp_sendmsg+0x510/0x850 [ 70.830962][ T4705] inet_sendmsg+0x154/0x27c [ 70.831849][ T4705] __sys_sendto+0x30c/0x420 [ 70.832644][ T4705] __arm64_sys_sendto+0xe4/0x104 [ 70.833530][ T4705] invoke_syscall+0x98/0x28c [ 70.834330][ T4705] el0_svc_common+0x13c/0x258 [ 70.835172][ T4705] do_el0_svc+0x5c/0x140 [ 70.835906][ T4705] el0_svc+0x78/0x1d0 [ 70.836646][ T4705] el0t_64_sync_handler+0xcc/0xe4 [ 70.837444][ T4705] el0t_64_sync+0x1a0/0x1a4 [ 70.838464][ T4705] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.840144][ T4705] CPU: 0 PID: 4705 Comm: syz.0.25 Not tainted syzkaller #0 [ 70.841236][ T4705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.842948][ T4705] Call trace: [ 70.843469][ T4705] dump_backtrace+0x0/0x458 [ 70.844160][ T4705] show_stack+0x2c/0x3c [ 70.844831][ T4705] __dump_stack+0x30/0x40 [ 70.845515][ T4705] dump_stack_lvl+0xf4/0x15c [ 70.846266][ T4705] dump_stack+0x1c/0x5c [ 70.846926][ T4705] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.847861][ T4705] dccp_xmit_packet+0x298/0x460 [ 70.848753][ T4705] dccp_write_xmit+0x118/0x1d0 [ 70.849651][ T4705] dccp_sendmsg+0x510/0x850 [ 70.850451][ T4705] inet_sendmsg+0x154/0x27c [ 70.851241][ T4705] __sys_sendto+0x30c/0x420 [ 70.852100][ T4705] __arm64_sys_sendto+0xe4/0x104 [ 70.852966][ T4705] invoke_syscall+0x98/0x28c [ 70.853758][ T4705] el0_svc_common+0x13c/0x258 [ 70.854644][ T4705] do_el0_svc+0x5c/0x140 [ 70.855399][ T4705] el0_svc+0x78/0x1d0 [ 70.856118][ T4705] el0t_64_sync_handler+0xcc/0xe4 [ 70.857072][ T4705] el0t_64_sync+0x1a0/0x1a4 [ 70.858018][ T4705] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.860507][ T4705] CPU: 0 PID: 4705 Comm: syz.0.25 Not tainted syzkaller #0 [ 70.861597][ T4705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.863242][ T4705] Call trace: [ 70.863743][ T4705] dump_backtrace+0x0/0x458 [ 70.864500][ T4705] show_stack+0x2c/0x3c [ 70.865131][ T4705] __dump_stack+0x30/0x40 [ 70.865843][ T4705] dump_stack_lvl+0xf4/0x15c [ 70.866607][ T4705] dump_stack+0x1c/0x5c [ 70.867281][ T4705] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.868172][ T4705] dccp_xmit_packet+0x298/0x460 [ 70.869020][ T4705] dccp_write_xmit+0x118/0x1d0 [ 70.869900][ T4705] dccp_sendmsg+0x510/0x850 [ 70.870696][ T4705] inet_sendmsg+0x154/0x27c [ 70.871627][ T4705] __sys_sendto+0x30c/0x420 [ 70.872517][ T4705] __arm64_sys_sendto+0xe4/0x104 [ 70.873341][ T4705] invoke_syscall+0x98/0x28c [ 70.874184][ T4705] el0_svc_common+0x13c/0x258 [ 70.875019][ T4705] do_el0_svc+0x5c/0x140 [ 70.875776][ T4705] el0_svc+0x78/0x1d0 [ 70.876568][ T4705] el0t_64_sync_handler+0xcc/0xe4 [ 70.877570][ T4705] el0t_64_sync+0x1a0/0x1a4 [ 70.878703][ T4705] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.880761][ T4705] CPU: 0 PID: 4705 Comm: syz.0.25 Not tainted syzkaller #0 [ 70.881908][ T4705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.883487][ T4705] Call trace: [ 70.884007][ T4705] dump_backtrace+0x0/0x458 [ 70.884753][ T4705] show_stack+0x2c/0x3c [ 70.885430][ T4705] __dump_stack+0x30/0x40 [ 70.886112][ T4705] dump_stack_lvl+0xf4/0x15c [ 70.886867][ T4705] dump_stack+0x1c/0x5c [ 70.887533][ T4705] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.888551][ T4705] dccp_xmit_packet+0x298/0x460 [ 70.889410][ T4705] dccp_write_xmit+0x118/0x1d0 [ 70.890347][ T4705] dccp_sendmsg+0x510/0x850 [ 70.891262][ T4705] inet_sendmsg+0x154/0x27c [ 70.892119][ T4705] __sys_sendto+0x30c/0x420 [ 70.892959][ T4705] __arm64_sys_sendto+0xe4/0x104 [ 70.893883][ T4705] invoke_syscall+0x98/0x28c [ 70.894739][ T4705] el0_svc_common+0x13c/0x258 [ 70.895603][ T4705] do_el0_svc+0x5c/0x140 [ 70.896297][ T4705] el0_svc+0x78/0x1d0 [ 70.896995][ T4705] el0t_64_sync_handler+0xcc/0xe4 [ 70.897808][ T4705] el0t_64_sync+0x1a0/0x1a4 [ 70.898923][ T4705] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.900860][ T4705] CPU: 0 PID: 4705 Comm: syz.0.25 Not tainted syzkaller #0 [ 70.902017][ T4705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.903519][ T4705] Call trace: [ 70.904001][ T4705] dump_backtrace+0x0/0x458 [ 70.904708][ T4705] show_stack+0x2c/0x3c [ 70.905317][ T4705] __dump_stack+0x30/0x40 [ 70.905980][ T4705] dump_stack_lvl+0xf4/0x15c [ 70.906703][ T4705] dump_stack+0x1c/0x5c [ 70.907369][ T4705] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.908246][ T4705] dccp_xmit_packet+0x298/0x460 [ 70.909121][ T4705] dccp_write_xmit+0x118/0x1d0 [ 70.910008][ T4705] dccp_sendmsg+0x510/0x850 [ 70.910798][ T4705] inet_sendmsg+0x154/0x27c [ 70.911636][ T4705] __sys_sendto+0x30c/0x420 [ 70.912388][ T4705] __arm64_sys_sendto+0xe4/0x104 [ 70.913197][ T4705] invoke_syscall+0x98/0x28c [ 70.913952][ T4705] el0_svc_common+0x13c/0x258 [ 70.914725][ T4705] do_el0_svc+0x5c/0x140 [ 70.915467][ T4705] el0_svc+0x78/0x1d0 [ 70.916154][ T4705] el0t_64_sync_handler+0xcc/0xe4 [ 70.917020][ T4705] el0t_64_sync+0x1a0/0x1a4 [ 70.917878][ T4705] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.919875][ T4705] CPU: 0 PID: 4705 Comm: syz.0.25 Not tainted syzkaller #0 [ 70.920997][ T4705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.922609][ T4705] Call trace: [ 70.923164][ T4705] dump_backtrace+0x0/0x458 [ 70.923844][ T4705] show_stack+0x2c/0x3c [ 70.924480][ T4705] __dump_stack+0x30/0x40 [ 70.925173][ T4705] dump_stack_lvl+0xf4/0x15c [ 70.925932][ T4705] dump_stack+0x1c/0x5c [ 70.926641][ T4705] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.927519][ T4705] dccp_xmit_packet+0x298/0x460 [ 70.928308][ T4705] dccp_write_xmit+0x118/0x1d0 [ 70.929112][ T4705] dccp_sendmsg+0x510/0x850 [ 70.929861][ T4705] inet_sendmsg+0x154/0x27c [ 70.930647][ T4705] __sys_sendto+0x30c/0x420 [ 70.931391][ T4705] __arm64_sys_sendto+0xe4/0x104 [ 70.932258][ T4705] invoke_syscall+0x98/0x28c [ 70.932984][ T4705] el0_svc_common+0x13c/0x258 [ 70.933871][ T4705] do_el0_svc+0x5c/0x140 [ 70.934538][ T4705] el0_svc+0x78/0x1d0 [ 70.935204][ T4705] el0t_64_sync_handler+0xcc/0xe4 [ 70.936228][ T4705] el0t_64_sync+0x1a0/0x1a4 [ 70.937202][ T4705] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.939213][ T4705] CPU: 0 PID: 4705 Comm: syz.0.25 Not tainted syzkaller #0 [ 70.940252][ T4705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.941981][ T4705] Call trace: [ 70.942531][ T4705] dump_backtrace+0x0/0x458 [ 70.943308][ T4705] show_stack+0x2c/0x3c [ 70.944052][ T4705] __dump_stack+0x30/0x40 [ 70.944871][ T4705] dump_stack_lvl+0xf4/0x15c [ 70.945728][ T4705] dump_stack+0x1c/0x5c [ 70.946427][ T4705] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.947291][ T4705] dccp_xmit_packet+0x298/0x460 [ 70.948062][ T4705] dccp_write_xmit+0x118/0x1d0 [ 70.948936][ T4705] dccp_sendmsg+0x510/0x850 [ 70.949846][ T4705] inet_sendmsg+0x154/0x27c [ 70.950742][ T4705] __sys_sendto+0x30c/0x420 [ 70.951605][ T4705] __arm64_sys_sendto+0xe4/0x104 [ 70.952537][ T4705] invoke_syscall+0x98/0x28c [ 70.953389][ T4705] el0_svc_common+0x13c/0x258 [ 70.954264][ T4705] do_el0_svc+0x5c/0x140 [ 70.955013][ T4705] el0_svc+0x78/0x1d0 [ 70.955687][ T4705] el0t_64_sync_handler+0xcc/0xe4 [ 70.956577][ T4705] el0t_64_sync+0x1a0/0x1a4 [ 70.988273][ T4709] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 70.990227][ T4709] CPU: 0 PID: 4709 Comm: syz.0.27 Not tainted syzkaller #0 [ 70.991367][ T4709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.992884][ T4709] Call trace: [ 70.993356][ T4709] dump_backtrace+0x0/0x458 [ 70.994137][ T4709] show_stack+0x2c/0x3c [ 70.994800][ T4709] __dump_stack+0x30/0x40 [ 70.995435][ T4709] dump_stack_lvl+0xf4/0x15c [ 70.996185][ T4709] dump_stack+0x1c/0x5c [ 70.996818][ T4709] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 70.997637][ T4709] dccp_xmit_packet+0x298/0x460 [ 70.998432][ T4709] dccp_write_xmit+0x118/0x1d0 [ 70.999248][ T4709] dccp_sendmsg+0x510/0x850 [ 71.000068][ T4709] inet_sendmsg+0x154/0x27c [ 71.000948][ T4709] __sys_sendto+0x30c/0x420 [ 71.001763][ T4709] __arm64_sys_sendto+0xe4/0x104 [ 71.002610][ T4709] invoke_syscall+0x98/0x28c [ 71.003340][ T4709] el0_svc_common+0x13c/0x258 [ 71.004102][ T4709] do_el0_svc+0x5c/0x140 [ 71.004858][ T4709] el0_svc+0x78/0x1d0 [ 71.005656][ T4709] el0t_64_sync_handler+0xcc/0xe4 [ 71.006569][ T4709] el0t_64_sync+0x1a0/0x1a4 [ 71.007689][ T4709] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.010588][ T4709] CPU: 0 PID: 4709 Comm: syz.0.27 Not tainted syzkaller #0 [ 71.011729][ T4709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.013276][ T4709] Call trace: [ 71.013791][ T4709] dump_backtrace+0x0/0x458 [ 71.014539][ T4709] show_stack+0x2c/0x3c [ 71.015196][ T4709] __dump_stack+0x30/0x40 [ 71.015887][ T4709] dump_stack_lvl+0xf4/0x15c [ 71.016573][ T4709] dump_stack+0x1c/0x5c [ 71.017351][ T4709] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.018280][ T4709] dccp_xmit_packet+0x298/0x460 [ 71.019093][ T4709] dccp_write_xmit+0x118/0x1d0 [ 71.019957][ T4709] dccp_sendmsg+0x510/0x850 [ 71.020807][ T4709] inet_sendmsg+0x154/0x27c [ 71.021610][ T4709] __sys_sendto+0x30c/0x420 [ 71.022403][ T4709] __arm64_sys_sendto+0xe4/0x104 [ 71.023242][ T4709] invoke_syscall+0x98/0x28c [ 71.024104][ T4709] el0_svc_common+0x13c/0x258 [ 71.025001][ T4709] do_el0_svc+0x5c/0x140 [ 71.025757][ T4709] el0_svc+0x78/0x1d0 [ 71.026484][ T4709] el0t_64_sync_handler+0xcc/0xe4 [ 71.027342][ T4709] el0t_64_sync+0x1a0/0x1a4 [ 71.028692][ T4709] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.030483][ T4709] CPU: 0 PID: 4709 Comm: syz.0.27 Not tainted syzkaller #0 [ 71.031678][ T4709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.033406][ T4709] Call trace: [ 71.034009][ T4709] dump_backtrace+0x0/0x458 [ 71.034798][ T4709] show_stack+0x2c/0x3c [ 71.035521][ T4709] __dump_stack+0x30/0x40 [ 71.036211][ T4709] dump_stack_lvl+0xf4/0x15c [ 71.036971][ T4709] dump_stack+0x1c/0x5c [ 71.037715][ T4709] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.038736][ T4709] dccp_xmit_packet+0x298/0x460 [ 71.039659][ T4709] dccp_write_xmit+0x118/0x1d0 [ 71.040447][ T4709] dccp_sendmsg+0x510/0x850 [ 71.041236][ T4709] inet_sendmsg+0x154/0x27c [ 71.042069][ T4709] __sys_sendto+0x30c/0x420 [ 71.042857][ T4709] __arm64_sys_sendto+0xe4/0x104 [ 71.043846][ T4709] invoke_syscall+0x98/0x28c [ 71.044643][ T4709] el0_svc_common+0x13c/0x258 [ 71.045459][ T4709] do_el0_svc+0x5c/0x140 [ 71.046138][ T4709] el0_svc+0x78/0x1d0 [ 71.046789][ T4709] el0t_64_sync_handler+0xcc/0xe4 [ 71.047600][ T4709] el0t_64_sync+0x1a0/0x1a4 [ 71.048620][ T4709] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.050441][ T4709] CPU: 0 PID: 4709 Comm: syz.0.27 Not tainted syzkaller #0 [ 71.051577][ T4709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.053233][ T4709] Call trace: [ 71.053775][ T4709] dump_backtrace+0x0/0x458 [ 71.054440][ T4709] show_stack+0x2c/0x3c [ 71.055147][ T4709] __dump_stack+0x30/0x40 [ 71.055888][ T4709] dump_stack_lvl+0xf4/0x15c [ 71.056693][ T4709] dump_stack+0x1c/0x5c [ 71.057417][ T4709] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.058336][ T4709] dccp_xmit_packet+0x298/0x460 [ 71.059202][ T4709] dccp_write_xmit+0x118/0x1d0 [ 71.060050][ T4709] dccp_sendmsg+0x510/0x850 [ 71.060845][ T4709] inet_sendmsg+0x154/0x27c [ 71.061656][ T4709] __sys_sendto+0x30c/0x420 [ 71.062455][ T4709] __arm64_sys_sendto+0xe4/0x104 [ 71.063294][ T4709] invoke_syscall+0x98/0x28c [ 71.064095][ T4709] el0_svc_common+0x13c/0x258 [ 71.064989][ T4709] do_el0_svc+0x5c/0x140 [ 71.065694][ T4709] el0_svc+0x78/0x1d0 [ 71.066354][ T4709] el0t_64_sync_handler+0xcc/0xe4 [ 71.067172][ T4709] el0t_64_sync+0x1a0/0x1a4 [ 71.068221][ T4709] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.069926][ T4709] CPU: 0 PID: 4709 Comm: syz.0.27 Not tainted syzkaller #0 [ 71.071021][ T4709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.072649][ T4709] Call trace: [ 71.073183][ T4709] dump_backtrace+0x0/0x458 [ 71.073961][ T4709] show_stack+0x2c/0x3c [ 71.074605][ T4709] __dump_stack+0x30/0x40 [ 71.075229][ T4709] dump_stack_lvl+0xf4/0x15c [ 71.075947][ T4709] dump_stack+0x1c/0x5c [ 71.076573][ T4709] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.077459][ T4709] dccp_xmit_packet+0x298/0x460 [ 71.078204][ T4709] dccp_write_xmit+0x118/0x1d0 [ 71.079061][ T4709] dccp_sendmsg+0x510/0x850 [ 71.079858][ T4709] inet_sendmsg+0x154/0x27c [ 71.080604][ T4709] __sys_sendto+0x30c/0x420 [ 71.081497][ T4709] __arm64_sys_sendto+0xe4/0x104 [ 71.082424][ T4709] invoke_syscall+0x98/0x28c [ 71.083281][ T4709] el0_svc_common+0x13c/0x258 [ 71.084147][ T4709] do_el0_svc+0x5c/0x140 [ 71.084874][ T4709] el0_svc+0x78/0x1d0 [ 71.085567][ T4709] el0t_64_sync_handler+0xcc/0xe4 [ 71.086480][ T4709] el0t_64_sync+0x1a0/0x1a4 [ 71.087963][ T4709] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.090219][ T4709] CPU: 0 PID: 4709 Comm: syz.0.27 Not tainted syzkaller #0 [ 71.091471][ T4709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.093115][ T4709] Call trace: [ 71.093639][ T4709] dump_backtrace+0x0/0x458 [ 71.094345][ T4709] show_stack+0x2c/0x3c [ 71.094958][ T4709] __dump_stack+0x30/0x40 [ 71.095700][ T4709] dump_stack_lvl+0xf4/0x15c [ 71.096483][ T4709] dump_stack+0x1c/0x5c [ 71.097155][ T4709] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.098090][ T4709] dccp_xmit_packet+0x298/0x460 [ 71.099057][ T4709] dccp_write_xmit+0x118/0x1d0 [ 71.099928][ T4709] dccp_sendmsg+0x510/0x850 [ 71.100661][ T4709] inet_sendmsg+0x154/0x27c [ 71.101421][ T4709] __sys_sendto+0x30c/0x420 [ 71.102223][ T4709] __arm64_sys_sendto+0xe4/0x104 [ 71.103081][ T4709] invoke_syscall+0x98/0x28c [ 71.103896][ T4709] el0_svc_common+0x13c/0x258 [ 71.104729][ T4709] do_el0_svc+0x5c/0x140 [ 71.105460][ T4709] el0_svc+0x78/0x1d0 [ 71.106153][ T4709] el0t_64_sync_handler+0xcc/0xe4 [ 71.107033][ T4709] el0t_64_sync+0x1a0/0x1a4 [ 71.108052][ T4709] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.110026][ T4709] CPU: 0 PID: 4709 Comm: syz.0.27 Not tainted syzkaller #0 [ 71.111335][ T4709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.113014][ T4709] Call trace: [ 71.113526][ T4709] dump_backtrace+0x0/0x458 [ 71.114190][ T4709] show_stack+0x2c/0x3c [ 71.114864][ T4709] __dump_stack+0x30/0x40 [ 71.115536][ T4709] dump_stack_lvl+0xf4/0x15c [ 71.116254][ T4709] dump_stack+0x1c/0x5c [ 71.116932][ T4709] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.117767][ T4709] dccp_xmit_packet+0x298/0x460 [ 71.118615][ T4709] dccp_write_xmit+0x118/0x1d0 [ 71.119401][ T4709] dccp_sendmsg+0x510/0x850 [ 71.120198][ T4709] inet_sendmsg+0x154/0x27c [ 71.120903][ T4709] __sys_sendto+0x30c/0x420 [ 71.121651][ T4709] __arm64_sys_sendto+0xe4/0x104 [ 71.122512][ T4709] invoke_syscall+0x98/0x28c [ 71.123334][ T4709] el0_svc_common+0x13c/0x258 [ 71.124171][ T4709] do_el0_svc+0x5c/0x140 [ 71.124982][ T4709] el0_svc+0x78/0x1d0 [ 71.125674][ T4709] el0t_64_sync_handler+0xcc/0xe4 [ 71.126571][ T4709] el0t_64_sync+0x1a0/0x1a4 [ 71.127611][ T4709] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.129841][ T4709] CPU: 0 PID: 4709 Comm: syz.0.27 Not tainted syzkaller #0 [ 71.130979][ T4709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.132610][ T4709] Call trace: [ 71.133160][ T4709] dump_backtrace+0x0/0x458 [ 71.133903][ T4709] show_stack+0x2c/0x3c [ 71.134625][ T4709] __dump_stack+0x30/0x40 [ 71.135313][ T4709] dump_stack_lvl+0xf4/0x15c [ 71.136107][ T4709] dump_stack+0x1c/0x5c [ 71.136768][ T4709] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.137669][ T4709] dccp_xmit_packet+0x298/0x460 [ 71.138497][ T4709] dccp_write_xmit+0x118/0x1d0 [ 71.139362][ T4709] dccp_sendmsg+0x510/0x850 [ 71.140238][ T4709] inet_sendmsg+0x154/0x27c [ 71.141053][ T4709] __sys_sendto+0x30c/0x420 [ 71.141937][ T4709] __arm64_sys_sendto+0xe4/0x104 [ 71.142789][ T4709] invoke_syscall+0x98/0x28c [ 71.143559][ T4709] el0_svc_common+0x13c/0x258 [ 71.144323][ T4709] do_el0_svc+0x5c/0x140 [ 71.145014][ T4709] el0_svc+0x78/0x1d0 [ 71.145678][ T4709] el0t_64_sync_handler+0xcc/0xe4 [ 71.146507][ T4709] el0t_64_sync+0x1a0/0x1a4 [ 71.147423][ T4709] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.149322][ T4709] CPU: 0 PID: 4709 Comm: syz.0.27 Not tainted syzkaller #0 [ 71.150531][ T4709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.152315][ T4709] Call trace: [ 71.152875][ T4709] dump_backtrace+0x0/0x458 [ 71.153605][ T4709] show_stack+0x2c/0x3c [ 71.154244][ T4709] __dump_stack+0x30/0x40 [ 71.154923][ T4709] dump_stack_lvl+0xf4/0x15c [ 71.155642][ T4709] dump_stack+0x1c/0x5c [ 71.156311][ T4709] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.157153][ T4709] dccp_xmit_packet+0x298/0x460 [ 71.157892][ T4709] dccp_write_xmit+0x118/0x1d0 [ 71.158712][ T4709] dccp_sendmsg+0x510/0x850 [ 71.159497][ T4709] inet_sendmsg+0x154/0x27c [ 71.160277][ T4709] __sys_sendto+0x30c/0x420 [ 71.160997][ T4709] __arm64_sys_sendto+0xe4/0x104 [ 71.161830][ T4709] invoke_syscall+0x98/0x28c [ 71.162558][ T4709] el0_svc_common+0x13c/0x258 [ 71.163365][ T4709] do_el0_svc+0x5c/0x140 [ 71.164149][ T4709] el0_svc+0x78/0x1d0 [ 71.164775][ T4709] el0t_64_sync_handler+0xcc/0xe4 [ 71.165570][ T4709] el0t_64_sync+0x1a0/0x1a4 [ 71.166524][ T4709] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.168456][ T4709] CPU: 0 PID: 4709 Comm: syz.0.27 Not tainted syzkaller #0 [ 71.169588][ T4709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.171094][ T4709] Call trace: [ 71.171610][ T4709] dump_backtrace+0x0/0x458 [ 71.172238][ T4709] show_stack+0x2c/0x3c [ 71.172852][ T4709] __dump_stack+0x30/0x40 [ 71.173583][ T4709] dump_stack_lvl+0xf4/0x15c [ 71.174283][ T4709] dump_stack+0x1c/0x5c [ 71.174973][ T4709] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.175851][ T4709] dccp_xmit_packet+0x298/0x460 [ 71.176606][ T4709] dccp_write_xmit+0x118/0x1d0 [ 71.177354][ T4709] dccp_sendmsg+0x510/0x850 [ 71.178040][ T4709] inet_sendmsg+0x154/0x27c [ 71.178799][ T4709] __sys_sendto+0x30c/0x420 [ 71.179586][ T4709] __arm64_sys_sendto+0xe4/0x104 [ 71.180380][ T4709] invoke_syscall+0x98/0x28c [ 71.181124][ T4709] el0_svc_common+0x13c/0x258 [ 71.181930][ T4709] do_el0_svc+0x5c/0x140 [ 71.182734][ T4709] el0_svc+0x78/0x1d0 [ 71.183451][ T4709] el0t_64_sync_handler+0xcc/0xe4 [ 71.184261][ T4709] el0t_64_sync+0x1a0/0x1a4 [ 71.185238][ T4709] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.187093][ T4709] CPU: 0 PID: 4709 Comm: syz.0.27 Not tainted syzkaller #0 [ 71.188276][ T4709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.190015][ T4709] Call trace: [ 71.190610][ T4709] dump_backtrace+0x0/0x458 [ 71.191385][ T4709] show_stack+0x2c/0x3c [ 71.192176][ T4709] __dump_stack+0x30/0x40 [ 71.192947][ T4709] dump_stack_lvl+0xf4/0x15c [ 71.193715][ T4709] dump_stack+0x1c/0x5c [ 71.194415][ T4709] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.195351][ T4709] dccp_xmit_packet+0x298/0x460 [ 71.196156][ T4709] dccp_write_xmit+0x118/0x1d0 [ 71.196958][ T4709] dccp_sendmsg+0x510/0x850 [ 71.197685][ T4709] inet_sendmsg+0x154/0x27c [ 71.198449][ T4709] __sys_sendto+0x30c/0x420 [ 71.199186][ T4709] __arm64_sys_sendto+0xe4/0x104 [ 71.199942][ T4709] invoke_syscall+0x98/0x28c [ 71.200646][ T4709] el0_svc_common+0x13c/0x258 [ 71.201361][ T4709] do_el0_svc+0x5c/0x140 [ 71.202089][ T4709] el0_svc+0x78/0x1d0 [ 71.202731][ T4709] el0t_64_sync_handler+0xcc/0xe4 [ 71.203530][ T4709] el0t_64_sync+0x1a0/0x1a4 [ 71.204921][ T4709] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.206743][ T4709] CPU: 0 PID: 4709 Comm: syz.0.27 Not tainted syzkaller #0 [ 71.207899][ T4709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.209571][ T4709] Call trace: [ 71.210135][ T4709] dump_backtrace+0x0/0x458 [ 71.210899][ T4709] show_stack+0x2c/0x3c [ 71.211564][ T4709] __dump_stack+0x30/0x40 [ 71.212250][ T4709] dump_stack_lvl+0xf4/0x15c [ 71.213064][ T4709] dump_stack+0x1c/0x5c [ 71.213773][ T4709] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.214724][ T4709] dccp_xmit_packet+0x298/0x460 [ 71.215536][ T4709] dccp_write_xmit+0x118/0x1d0 [ 71.216324][ T4709] dccp_sendmsg+0x510/0x850 [ 71.217084][ T4709] inet_sendmsg+0x154/0x27c [ 71.217801][ T4709] __sys_sendto+0x30c/0x420 [ 71.218549][ T4709] __arm64_sys_sendto+0xe4/0x104 [ 71.219390][ T4709] invoke_syscall+0x98/0x28c [ 71.220147][ T4709] el0_svc_common+0x13c/0x258 [ 71.220944][ T4709] do_el0_svc+0x5c/0x140 [ 71.221620][ T4709] el0_svc+0x78/0x1d0 [ 71.222336][ T4709] el0t_64_sync_handler+0xcc/0xe4 [ 71.223172][ T4709] el0t_64_sync+0x1a0/0x1a4 [ 71.224170][ T4709] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.225982][ T4709] CPU: 0 PID: 4709 Comm: syz.0.27 Not tainted syzkaller #0 [ 71.227086][ T4709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.228683][ T4709] Call trace: [ 71.229251][ T4709] dump_backtrace+0x0/0x458 [ 71.230038][ T4709] show_stack+0x2c/0x3c [ 71.230808][ T4709] __dump_stack+0x30/0x40 [ 71.231567][ T4709] dump_stack_lvl+0xf4/0x15c [ 71.232381][ T4709] dump_stack+0x1c/0x5c [ 71.233120][ T4709] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.234066][ T4709] dccp_xmit_packet+0x298/0x460 [ 71.234921][ T4709] dccp_write_xmit+0x118/0x1d0 [ 71.235741][ T4709] dccp_sendmsg+0x510/0x850 [ 71.236482][ T4709] inet_sendmsg+0x154/0x27c [ 71.237205][ T4709] __sys_sendto+0x30c/0x420 [ 71.237947][ T4709] __arm64_sys_sendto+0xe4/0x104 [ 71.238799][ T4709] invoke_syscall+0x98/0x28c [ 71.239620][ T4709] el0_svc_common+0x13c/0x258 [ 71.240459][ T4709] do_el0_svc+0x5c/0x140 [ 71.241153][ T4709] el0_svc+0x78/0x1d0 [ 71.241866][ T4709] el0t_64_sync_handler+0xcc/0xe4 [ 71.242744][ T4709] el0t_64_sync+0x1a0/0x1a4 [ 71.243677][ T4709] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.245586][ T4709] CPU: 0 PID: 4709 Comm: syz.0.27 Not tainted syzkaller #0 [ 71.246764][ T4709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.248434][ T4709] Call trace: [ 71.248992][ T4709] dump_backtrace+0x0/0x458 [ 71.249720][ T4709] show_stack+0x2c/0x3c [ 71.250317][ T4709] __dump_stack+0x30/0x40 [ 71.251032][ T4709] dump_stack_lvl+0xf4/0x15c [ 71.251893][ T4709] dump_stack+0x1c/0x5c [ 71.252614][ T4709] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.253559][ T4709] dccp_xmit_packet+0x298/0x460 [ 71.254352][ T4709] dccp_write_xmit+0x118/0x1d0 [ 71.255168][ T4709] dccp_sendmsg+0x510/0x850 [ 71.255893][ T4709] inet_sendmsg+0x154/0x27c [ 71.256660][ T4709] __sys_sendto+0x30c/0x420 [ 71.257439][ T4709] __arm64_sys_sendto+0xe4/0x104 [ 71.258310][ T4709] invoke_syscall+0x98/0x28c [ 71.259109][ T4709] el0_svc_common+0x13c/0x258 [ 71.259899][ T4709] do_el0_svc+0x5c/0x140 [ 71.260607][ T4709] el0_svc+0x78/0x1d0 [ 71.261313][ T4709] el0t_64_sync_handler+0xcc/0xe4 [ 71.262150][ T4709] el0t_64_sync+0x1a0/0x1a4 [ 71.263128][ T4709] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.264953][ T4709] CPU: 0 PID: 4709 Comm: syz.0.27 Not tainted syzkaller #0 [ 71.264988][ T136] device hsr_slave_0 left promiscuous mode [ 71.266154][ T4709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.266168][ T4709] Call trace: [ 71.266173][ T4709] dump_backtrace+0x0/0x458 [ 71.270155][ T4709] show_stack+0x2c/0x3c [ 71.270914][ T4709] __dump_stack+0x30/0x40 [ 71.271692][ T4709] dump_stack_lvl+0xf4/0x15c [ 71.272520][ T4709] dump_stack+0x1c/0x5c [ 71.273286][ T4709] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.274275][ T4709] dccp_xmit_packet+0x298/0x460 [ 71.275172][ T4709] dccp_write_xmit+0x118/0x1d0 [ 71.275966][ T4709] dccp_sendmsg+0x510/0x850 [ 71.276716][ T4709] inet_sendmsg+0x154/0x27c [ 71.277457][ T4709] __sys_sendto+0x30c/0x420 [ 71.278188][ T4709] __arm64_sys_sendto+0xe4/0x104 [ 71.279041][ T4709] invoke_syscall+0x98/0x28c [ 71.279811][ T4709] el0_svc_common+0x13c/0x258 [ 71.280554][ T4709] do_el0_svc+0x5c/0x140 [ 71.281266][ T4709] el0_svc+0x78/0x1d0 [ 71.281925][ T4709] el0t_64_sync_handler+0xcc/0xe4 [ 71.282718][ T4709] el0t_64_sync+0x1a0/0x1a4 [ 71.307177][ T4711] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.309126][ T4711] CPU: 1 PID: 4711 Comm: syz.0.28 Not tainted syzkaller #0 [ 71.310282][ T4711] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.311815][ T4711] Call trace: [ 71.312272][ T4711] dump_backtrace+0x0/0x458 [ 71.312942][ T4711] show_stack+0x2c/0x3c [ 71.313571][ T4711] __dump_stack+0x30/0x40 [ 71.314208][ T4711] dump_stack_lvl+0xf4/0x15c [ 71.314927][ T4711] dump_stack+0x1c/0x5c [ 71.315550][ T4711] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.316401][ T4711] dccp_xmit_packet+0x298/0x460 [ 71.317168][ T4711] dccp_write_xmit+0x118/0x1d0 [ 71.317925][ T4711] dccp_sendmsg+0x510/0x850 [ 71.318619][ T4711] inet_sendmsg+0x154/0x27c [ 71.319315][ T4711] __sys_sendto+0x30c/0x420 [ 71.320016][ T4711] __arm64_sys_sendto+0xe4/0x104 [ 71.320806][ T4711] invoke_syscall+0x98/0x28c [ 71.321491][ T4711] el0_svc_common+0x13c/0x258 [ 71.322230][ T4711] do_el0_svc+0x5c/0x140 [ 71.322879][ T4711] el0_svc+0x78/0x1d0 [ 71.323457][ T4711] el0t_64_sync_handler+0xcc/0xe4 [ 71.324207][ T4711] el0t_64_sync+0x1a0/0x1a4 [ 71.325643][ T136] device hsr_slave_1 left promiscuous mode [ 71.326944][ T4711] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.329249][ T4711] CPU: 0 PID: 4711 Comm: syz.0.28 Not tainted syzkaller #0 [ 71.330426][ T4711] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.332006][ T4711] Call trace: [ 71.332505][ T4711] dump_backtrace+0x0/0x458 [ 71.333167][ T4711] show_stack+0x2c/0x3c [ 71.333758][ T4711] __dump_stack+0x30/0x40 [ 71.334499][ T4711] dump_stack_lvl+0xf4/0x15c [ 71.335216][ T4711] dump_stack+0x1c/0x5c [ 71.335884][ T4711] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.336705][ T4711] dccp_xmit_packet+0x298/0x460 [ 71.337580][ T4711] dccp_write_xmit+0x118/0x1d0 [ 71.338420][ T4711] dccp_sendmsg+0x510/0x850 [ 71.339258][ T4711] inet_sendmsg+0x154/0x27c [ 71.340041][ T4711] __sys_sendto+0x30c/0x420 [ 71.340778][ T4711] __arm64_sys_sendto+0xe4/0x104 [ 71.341645][ T4711] invoke_syscall+0x98/0x28c [ 71.342525][ T4711] el0_svc_common+0x13c/0x258 [ 71.343449][ T4711] do_el0_svc+0x5c/0x140 [ 71.344232][ T4711] el0_svc+0x78/0x1d0 [ 71.344985][ T4711] el0t_64_sync_handler+0xcc/0xe4 [ 71.345942][ T4711] el0t_64_sync+0x1a0/0x1a4 [ 71.346999][ T4711] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.348932][ T4711] CPU: 0 PID: 4711 Comm: syz.0.28 Not tainted syzkaller #0 [ 71.350062][ T4711] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.351772][ T4711] Call trace: [ 71.352349][ T4711] dump_backtrace+0x0/0x458 [ 71.353187][ T4711] show_stack+0x2c/0x3c [ 71.353986][ T4711] __dump_stack+0x30/0x40 [ 71.354796][ T4711] dump_stack_lvl+0xf4/0x15c [ 71.355618][ T4711] dump_stack+0x1c/0x5c [ 71.356336][ T4711] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.357311][ T4711] dccp_xmit_packet+0x298/0x460 [ 71.358211][ T4711] dccp_write_xmit+0x118/0x1d0 [ 71.359012][ T4711] dccp_sendmsg+0x510/0x850 [ 71.359786][ T4711] inet_sendmsg+0x154/0x27c [ 71.360580][ T4711] __sys_sendto+0x30c/0x420 [ 71.361437][ T4711] __arm64_sys_sendto+0xe4/0x104 [ 71.362376][ T4711] invoke_syscall+0x98/0x28c [ 71.363208][ T4711] el0_svc_common+0x13c/0x258 [ 71.364108][ T4711] do_el0_svc+0x5c/0x140 [ 71.364851][ T4711] el0_svc+0x78/0x1d0 [ 71.365640][ T4711] el0t_64_sync_handler+0xcc/0xe4 [ 71.366513][ T4711] el0t_64_sync+0x1a0/0x1a4 [ 71.367467][ T4711] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.369409][ T4711] CPU: 0 PID: 4711 Comm: syz.0.28 Not tainted syzkaller #0 [ 71.370624][ T4711] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.372356][ T4711] Call trace: [ 71.372865][ T4711] dump_backtrace+0x0/0x458 [ 71.373534][ T4711] show_stack+0x2c/0x3c [ 71.374156][ T4711] __dump_stack+0x30/0x40 [ 71.374874][ T4711] dump_stack_lvl+0xf4/0x15c [ 71.375616][ T4711] dump_stack+0x1c/0x5c [ 71.376217][ T4711] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.377075][ T4711] dccp_xmit_packet+0x298/0x460 [ 71.377864][ T4711] dccp_write_xmit+0x118/0x1d0 [ 71.378638][ T4711] dccp_sendmsg+0x510/0x850 [ 71.379448][ T4711] inet_sendmsg+0x154/0x27c [ 71.380199][ T4711] __sys_sendto+0x30c/0x420 [ 71.381023][ T4711] __arm64_sys_sendto+0xe4/0x104 [ 71.381919][ T4711] invoke_syscall+0x98/0x28c [ 71.382728][ T4711] el0_svc_common+0x13c/0x258 [ 71.383500][ T4711] do_el0_svc+0x5c/0x140 [ 71.384286][ T4711] el0_svc+0x78/0x1d0 [ 71.385018][ T4711] el0t_64_sync_handler+0xcc/0xe4 [ 71.385885][ T4711] el0t_64_sync+0x1a0/0x1a4 [ 71.386950][ T4711] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.388175][ T136] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 71.388857][ T4711] CPU: 0 PID: 4711 Comm: syz.0.28 Not tainted syzkaller #0 [ 71.390163][ T136] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 71.391355][ T4711] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.391365][ T4711] Call trace: [ 71.391369][ T4711] dump_backtrace+0x0/0x458 [ 71.391377][ T4711] show_stack+0x2c/0x3c [ 71.391382][ T4711] __dump_stack+0x30/0x40 [ 71.391387][ T4711] dump_stack_lvl+0xf4/0x15c [ 71.391392][ T4711] dump_stack+0x1c/0x5c [ 71.391397][ T4711] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.391402][ T4711] dccp_xmit_packet+0x298/0x460 [ 71.391407][ T4711] dccp_write_xmit+0x118/0x1d0 [ 71.391412][ T4711] dccp_sendmsg+0x510/0x850 [ 71.391417][ T4711] inet_sendmsg+0x154/0x27c [ 71.391422][ T4711] __sys_sendto+0x30c/0x420 [ 71.391426][ T4711] __arm64_sys_sendto+0xe4/0x104 [ 71.391431][ T4711] invoke_syscall+0x98/0x28c [ 71.391436][ T4711] el0_svc_common+0x13c/0x258 [ 71.391441][ T4711] do_el0_svc+0x5c/0x140 [ 71.391446][ T4711] el0_svc+0x78/0x1d0 [ 71.391451][ T4711] el0t_64_sync_handler+0xcc/0xe4 [ 71.391456][ T4711] el0t_64_sync+0x1a0/0x1a4 [ 71.391638][ T4711] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.409079][ T4711] CPU: 0 PID: 4711 Comm: syz.0.28 Not tainted syzkaller #0 [ 71.409417][ T136] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 71.410177][ T4711] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.411333][ T136] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 71.412765][ T4711] Call trace: [ 71.414580][ T4711] dump_backtrace+0x0/0x458 [ 71.415302][ T4711] show_stack+0x2c/0x3c [ 71.415963][ T4711] __dump_stack+0x30/0x40 [ 71.416669][ T4711] dump_stack_lvl+0xf4/0x15c [ 71.417500][ T4711] dump_stack+0x1c/0x5c [ 71.418125][ T4711] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.419219][ T4711] dccp_xmit_packet+0x298/0x460 [ 71.420121][ T4711] dccp_write_xmit+0x118/0x1d0 [ 71.421038][ T4711] dccp_sendmsg+0x510/0x850 [ 71.421920][ T4711] inet_sendmsg+0x154/0x27c [ 71.422771][ T4711] __sys_sendto+0x30c/0x420 [ 71.423603][ T4711] __arm64_sys_sendto+0xe4/0x104 [ 71.424516][ T4711] invoke_syscall+0x98/0x28c [ 71.425299][ T4711] el0_svc_common+0x13c/0x258 [ 71.426091][ T4711] do_el0_svc+0x5c/0x140 [ 71.426814][ T4711] el0_svc+0x78/0x1d0 [ 71.427513][ T4711] el0t_64_sync_handler+0xcc/0xe4 [ 71.428340][ T4711] el0t_64_sync+0x1a0/0x1a4 [ 71.429781][ T4711] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.430874][ T136] device bridge_slave_1 left promiscuous mode [ 71.431542][ T4711] CPU: 0 PID: 4711 Comm: syz.0.28 Not tainted syzkaller #0 [ 71.432681][ T136] bridge0: port 2(bridge_slave_1) entered disabled state [ 71.433668][ T4711] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.436425][ T4711] Call trace: [ 71.436938][ T4711] dump_backtrace+0x0/0x458 [ 71.437702][ T4711] show_stack+0x2c/0x3c [ 71.438420][ T4711] __dump_stack+0x30/0x40 [ 71.439209][ T4711] dump_stack_lvl+0xf4/0x15c [ 71.440038][ T4711] dump_stack+0x1c/0x5c [ 71.440723][ T4711] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.441673][ T4711] dccp_xmit_packet+0x298/0x460 [ 71.442556][ T4711] dccp_write_xmit+0x118/0x1d0 [ 71.443376][ T4711] dccp_sendmsg+0x510/0x850 [ 71.444200][ T4711] inet_sendmsg+0x154/0x27c [ 71.445025][ T4711] __sys_sendto+0x30c/0x420 [ 71.445871][ T4711] __arm64_sys_sendto+0xe4/0x104 [ 71.446699][ T4711] invoke_syscall+0x98/0x28c [ 71.447468][ T4711] el0_svc_common+0x13c/0x258 [ 71.448261][ T4711] do_el0_svc+0x5c/0x140 [ 71.448978][ T4711] el0_svc+0x78/0x1d0 [ 71.449628][ T4711] el0t_64_sync_handler+0xcc/0xe4 [ 71.450491][ T4711] el0t_64_sync+0x1a0/0x1a4 [ 71.451746][ T4711] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.453504][ T4711] CPU: 0 PID: 4711 Comm: syz.0.28 Not tainted syzkaller #0 [ 71.454694][ T4711] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.456162][ T4711] Call trace: [ 71.456685][ T4711] dump_backtrace+0x0/0x458 [ 71.457437][ T4711] show_stack+0x2c/0x3c [ 71.458084][ T4711] __dump_stack+0x30/0x40 [ 71.458795][ T4711] dump_stack_lvl+0xf4/0x15c [ 71.459599][ T4711] dump_stack+0x1c/0x5c [ 71.460273][ T4711] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.461176][ T4711] dccp_xmit_packet+0x298/0x460 [ 71.462042][ T4711] dccp_write_xmit+0x118/0x1d0 [ 71.462864][ T4711] dccp_sendmsg+0x510/0x850 [ 71.463604][ T4711] inet_sendmsg+0x154/0x27c [ 71.464389][ T4711] __sys_sendto+0x30c/0x420 [ 71.465159][ T4711] __arm64_sys_sendto+0xe4/0x104 [ 71.466004][ T4711] invoke_syscall+0x98/0x28c [ 71.466741][ T4711] el0_svc_common+0x13c/0x258 [ 71.467557][ T4711] do_el0_svc+0x5c/0x140 [ 71.468264][ T4711] el0_svc+0x78/0x1d0 [ 71.468910][ T4711] el0t_64_sync_handler+0xcc/0xe4 [ 71.469800][ T4711] el0t_64_sync+0x1a0/0x1a4 [ 71.470729][ T4711] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.472695][ T4711] CPU: 0 PID: 4711 Comm: syz.0.28 Not tainted syzkaller #0 [ 71.473950][ T4711] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.475680][ T4711] Call trace: [ 71.476220][ T4711] dump_backtrace+0x0/0x458 [ 71.476981][ T4711] show_stack+0x2c/0x3c [ 71.477641][ T4711] __dump_stack+0x30/0x40 [ 71.478297][ T4711] dump_stack_lvl+0xf4/0x15c [ 71.479126][ T4711] dump_stack+0x1c/0x5c [ 71.479856][ T4711] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.480801][ T4711] dccp_xmit_packet+0x298/0x460 [ 71.481623][ T4711] dccp_write_xmit+0x118/0x1d0 [ 71.482419][ T4711] dccp_sendmsg+0x510/0x850 [ 71.483189][ T4711] inet_sendmsg+0x154/0x27c [ 71.483984][ T4711] __sys_sendto+0x30c/0x420 [ 71.484736][ T4711] __arm64_sys_sendto+0xe4/0x104 [ 71.485565][ T4711] invoke_syscall+0x98/0x28c [ 71.486379][ T4711] el0_svc_common+0x13c/0x258 [ 71.487213][ T4711] do_el0_svc+0x5c/0x140 [ 71.487870][ T4711] el0_svc+0x78/0x1d0 [ 71.488553][ T4711] el0t_64_sync_handler+0xcc/0xe4 [ 71.489420][ T4711] el0t_64_sync+0x1a0/0x1a4 [ 71.490429][ T4711] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.492391][ T4711] CPU: 0 PID: 4711 Comm: syz.0.28 Not tainted syzkaller #0 [ 71.493630][ T4711] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.495452][ T4711] Call trace: [ 71.496029][ T4711] dump_backtrace+0x0/0x458 [ 71.496866][ T4711] show_stack+0x2c/0x3c [ 71.497607][ T4711] __dump_stack+0x30/0x40 [ 71.498329][ T4711] dump_stack_lvl+0xf4/0x15c [ 71.499137][ T4711] dump_stack+0x1c/0x5c [ 71.499893][ T4711] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.500894][ T4711] dccp_xmit_packet+0x298/0x460 [ 71.501763][ T4711] dccp_write_xmit+0x118/0x1d0 [ 71.502661][ T4711] dccp_sendmsg+0x510/0x850 [ 71.503527][ T4711] inet_sendmsg+0x154/0x27c [ 71.504337][ T4711] __sys_sendto+0x30c/0x420 [ 71.505162][ T4711] __arm64_sys_sendto+0xe4/0x104 [ 71.506070][ T4711] invoke_syscall+0x98/0x28c [ 71.506924][ T4711] el0_svc_common+0x13c/0x258 [ 71.507803][ T4711] do_el0_svc+0x5c/0x140 [ 71.508570][ T4711] el0_svc+0x78/0x1d0 [ 71.509309][ T4711] el0t_64_sync_handler+0xcc/0xe4 [ 71.510181][ T4711] el0t_64_sync+0x1a0/0x1a4 [ 71.511189][ T4711] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.512351][ T136] device bridge_slave_0 left promiscuous mode [ 71.513016][ T4711] CPU: 0 PID: 4711 Comm: syz.0.28 Not tainted syzkaller #0 [ 71.514154][ T136] bridge0: port 1(bridge_slave_0) entered disabled state [ 71.515282][ T4711] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.515294][ T4711] Call trace: [ 71.515297][ T4711] dump_backtrace+0x0/0x458 [ 71.519356][ T4711] show_stack+0x2c/0x3c [ 71.520154][ T4711] __dump_stack+0x30/0x40 [ 71.520862][ T4711] dump_stack_lvl+0xf4/0x15c [ 71.521582][ T4711] dump_stack+0x1c/0x5c [ 71.522318][ T4711] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.523315][ T4711] dccp_xmit_packet+0x298/0x460 [ 71.524225][ T4711] dccp_write_xmit+0x118/0x1d0 [ 71.525021][ T4711] dccp_sendmsg+0x510/0x850 [ 71.525815][ T4711] inet_sendmsg+0x154/0x27c [ 71.526608][ T4711] __sys_sendto+0x30c/0x420 [ 71.527365][ T4711] __arm64_sys_sendto+0xe4/0x104 [ 71.528199][ T4711] invoke_syscall+0x98/0x28c [ 71.528953][ T4711] el0_svc_common+0x13c/0x258 [ 71.529877][ T4711] do_el0_svc+0x5c/0x140 [ 71.530604][ T4711] el0_svc+0x78/0x1d0 [ 71.531295][ T4711] el0t_64_sync_handler+0xcc/0xe4 [ 71.532164][ T4711] el0t_64_sync+0x1a0/0x1a4 [ 71.533257][ T4711] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.535027][ T4711] CPU: 0 PID: 4711 Comm: syz.0.28 Not tainted syzkaller #0 [ 71.536208][ T4711] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.537824][ T4711] Call trace: [ 71.538393][ T4711] dump_backtrace+0x0/0x458 [ 71.539231][ T4711] show_stack+0x2c/0x3c [ 71.540000][ T4711] __dump_stack+0x30/0x40 [ 71.540694][ T4711] dump_stack_lvl+0xf4/0x15c [ 71.541495][ T4711] dump_stack+0x1c/0x5c [ 71.542173][ T4711] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.543103][ T4711] dccp_xmit_packet+0x298/0x460 [ 71.543884][ T4711] dccp_write_xmit+0x118/0x1d0 [ 71.544676][ T4711] dccp_sendmsg+0x510/0x850 [ 71.545447][ T4711] inet_sendmsg+0x154/0x27c [ 71.546216][ T4711] __sys_sendto+0x30c/0x420 [ 71.546982][ T4711] __arm64_sys_sendto+0xe4/0x104 [ 71.547889][ T4711] invoke_syscall+0x98/0x28c [ 71.548752][ T4711] el0_svc_common+0x13c/0x258 [ 71.549556][ T4711] do_el0_svc+0x5c/0x140 [ 71.550276][ T4711] el0_svc+0x78/0x1d0 [ 71.551031][ T4711] el0t_64_sync_handler+0xcc/0xe4 [ 71.552013][ T4711] el0t_64_sync+0x1a0/0x1a4 [ 71.553877][ T4711] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.555684][ T4711] CPU: 0 PID: 4711 Comm: syz.0.28 Not tainted syzkaller #0 [ 71.556904][ T4711] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.558680][ T4711] Call trace: [ 71.559248][ T4711] dump_backtrace+0x0/0x458 [ 71.560057][ T4711] show_stack+0x2c/0x3c [ 71.560808][ T4711] __dump_stack+0x30/0x40 [ 71.561641][ T4711] dump_stack_lvl+0xf4/0x15c [ 71.562449][ T4711] dump_stack+0x1c/0x5c [ 71.563172][ T4711] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.564185][ T4711] dccp_xmit_packet+0x298/0x460 [ 71.565041][ T4711] dccp_write_xmit+0x118/0x1d0 [ 71.565876][ T4711] dccp_sendmsg+0x510/0x850 [ 71.566618][ T4711] inet_sendmsg+0x154/0x27c [ 71.567401][ T4711] __sys_sendto+0x30c/0x420 [ 71.568162][ T4711] __arm64_sys_sendto+0xe4/0x104 [ 71.569023][ T4711] invoke_syscall+0x98/0x28c [ 71.569799][ T4711] el0_svc_common+0x13c/0x258 [ 71.570617][ T4711] do_el0_svc+0x5c/0x140 [ 71.571339][ T4711] el0_svc+0x78/0x1d0 [ 71.572026][ T4711] el0t_64_sync_handler+0xcc/0xe4 [ 71.572904][ T4711] el0t_64_sync+0x1a0/0x1a4 [ 71.573955][ T4711] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.575676][ T4711] CPU: 0 PID: 4711 Comm: syz.0.28 Not tainted syzkaller #0 [ 71.576748][ T4711] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.578250][ T4711] Call trace: [ 71.578846][ T4711] dump_backtrace+0x0/0x458 [ 71.579592][ T4711] show_stack+0x2c/0x3c [ 71.580307][ T4711] __dump_stack+0x30/0x40 [ 71.581025][ T4711] dump_stack_lvl+0xf4/0x15c [ 71.581843][ T4711] dump_stack+0x1c/0x5c [ 71.582571][ T4711] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.583499][ T4711] dccp_xmit_packet+0x298/0x460 [ 71.584385][ T4711] dccp_write_xmit+0x118/0x1d0 [ 71.585233][ T4711] dccp_sendmsg+0x510/0x850 [ 71.585997][ T4711] inet_sendmsg+0x154/0x27c [ 71.586739][ T4711] __sys_sendto+0x30c/0x420 [ 71.587449][ T4711] __arm64_sys_sendto+0xe4/0x104 [ 71.588230][ T4711] invoke_syscall+0x98/0x28c [ 71.589049][ T4711] el0_svc_common+0x13c/0x258 [ 71.589894][ T4711] do_el0_svc+0x5c/0x140 [ 71.590583][ T4711] el0_svc+0x78/0x1d0 [ 71.591259][ T4711] el0t_64_sync_handler+0xcc/0xe4 [ 71.592184][ T4711] el0t_64_sync+0x1a0/0x1a4 [ 71.593243][ T4711] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.595090][ T4711] CPU: 0 PID: 4711 Comm: syz.0.28 Not tainted syzkaller #0 [ 71.596242][ T4711] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.597951][ T4711] Call trace: [ 71.598554][ T4711] dump_backtrace+0x0/0x458 [ 71.599335][ T4711] show_stack+0x2c/0x3c [ 71.600067][ T4711] __dump_stack+0x30/0x40 [ 71.600840][ T4711] dump_stack_lvl+0xf4/0x15c [ 71.601630][ T4711] dump_stack+0x1c/0x5c [ 71.602398][ T4711] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.603444][ T4711] dccp_xmit_packet+0x298/0x460 [ 71.604311][ T4711] dccp_write_xmit+0x118/0x1d0 [ 71.605155][ T4711] dccp_sendmsg+0x510/0x850 [ 71.605942][ T4711] inet_sendmsg+0x154/0x27c [ 71.606815][ T4711] __sys_sendto+0x30c/0x420 [ 71.607649][ T4711] __arm64_sys_sendto+0xe4/0x104 [ 71.608513][ T4711] invoke_syscall+0x98/0x28c [ 71.609357][ T4711] el0_svc_common+0x13c/0x258 [ 71.610228][ T4711] do_el0_svc+0x5c/0x140 [ 71.610957][ T4711] el0_svc+0x78/0x1d0 [ 71.611689][ T4711] el0t_64_sync_handler+0xcc/0xe4 [ 71.612552][ T4711] el0t_64_sync+0x1a0/0x1a4 [ 71.613682][ T4711] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.615460][ T4711] CPU: 0 PID: 4711 Comm: syz.0.28 Not tainted syzkaller #0 [ 71.616526][ T4711] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.618043][ T4711] Call trace: [ 71.618589][ T4711] dump_backtrace+0x0/0x458 [ 71.619356][ T4711] show_stack+0x2c/0x3c [ 71.620065][ T4711] __dump_stack+0x30/0x40 [ 71.620919][ T4711] dump_stack_lvl+0xf4/0x15c [ 71.621765][ T4711] dump_stack+0x1c/0x5c [ 71.622521][ T4711] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.623556][ T4711] dccp_xmit_packet+0x298/0x460 [ 71.624401][ T4711] dccp_write_xmit+0x118/0x1d0 [ 71.625180][ T4711] dccp_sendmsg+0x510/0x850 [ 71.626031][ T4711] inet_sendmsg+0x154/0x27c [ 71.626840][ T4711] __sys_sendto+0x30c/0x420 [ 71.627650][ T4711] __arm64_sys_sendto+0xe4/0x104 [ 71.628539][ T4711] invoke_syscall+0x98/0x28c [ 71.629378][ T4711] el0_svc_common+0x13c/0x258 [ 71.630238][ T4711] do_el0_svc+0x5c/0x140 [ 71.630967][ T4711] el0_svc+0x78/0x1d0 [ 71.631720][ T4711] el0t_64_sync_handler+0xcc/0xe4 [ 71.632704][ T4711] el0t_64_sync+0x1a0/0x1a4 [ 71.653797][ T4713] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.655681][ T4713] CPU: 1 PID: 4713 Comm: syz.0.29 Not tainted syzkaller #0 [ 71.656782][ T4713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.658318][ T4713] Call trace: [ 71.658851][ T4713] dump_backtrace+0x0/0x458 [ 71.659565][ T4713] show_stack+0x2c/0x3c [ 71.660260][ T4713] __dump_stack+0x30/0x40 [ 71.660955][ T4713] dump_stack_lvl+0xf4/0x15c [ 71.661718][ T4713] dump_stack+0x1c/0x5c [ 71.662391][ T4713] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.663242][ T4713] dccp_xmit_packet+0x298/0x460 [ 71.663997][ T4713] dccp_write_xmit+0x118/0x1d0 [ 71.664863][ T4713] dccp_sendmsg+0x510/0x850 [ 71.665555][ T4713] inet_sendmsg+0x154/0x27c [ 71.666298][ T4713] __sys_sendto+0x30c/0x420 [ 71.667001][ T4713] __arm64_sys_sendto+0xe4/0x104 [ 71.667824][ T4713] invoke_syscall+0x98/0x28c [ 71.668646][ T4713] el0_svc_common+0x13c/0x258 [ 71.669450][ T4713] do_el0_svc+0x5c/0x140 [ 71.670225][ T4713] el0_svc+0x78/0x1d0 [ 71.670839][ T4713] el0t_64_sync_handler+0xcc/0xe4 [ 71.671635][ T4713] el0t_64_sync+0x1a0/0x1a4 [ 71.673636][ T4713] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.675226][ T4713] CPU: 1 PID: 4713 Comm: syz.0.29 Not tainted syzkaller #0 [ 71.676346][ T4713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.677945][ T4713] Call trace: [ 71.678483][ T4713] dump_backtrace+0x0/0x458 [ 71.679225][ T4713] show_stack+0x2c/0x3c [ 71.679905][ T4713] __dump_stack+0x30/0x40 [ 71.680569][ T4713] dump_stack_lvl+0xf4/0x15c [ 71.681296][ T4713] dump_stack+0x1c/0x5c [ 71.682023][ T4713] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.683002][ T4713] dccp_xmit_packet+0x298/0x460 [ 71.683847][ T4713] dccp_write_xmit+0x118/0x1d0 [ 71.684642][ T4713] dccp_sendmsg+0x510/0x850 [ 71.685406][ T4713] inet_sendmsg+0x154/0x27c [ 71.686176][ T4713] __sys_sendto+0x30c/0x420 [ 71.686918][ T4713] __arm64_sys_sendto+0xe4/0x104 [ 71.687771][ T4713] invoke_syscall+0x98/0x28c [ 71.688518][ T4713] el0_svc_common+0x13c/0x258 [ 71.689305][ T4713] do_el0_svc+0x5c/0x140 [ 71.690030][ T4713] el0_svc+0x78/0x1d0 [ 71.690742][ T4713] el0t_64_sync_handler+0xcc/0xe4 [ 71.691575][ T4713] el0t_64_sync+0x1a0/0x1a4 [ 71.693465][ T4713] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.695278][ T4713] CPU: 1 PID: 4713 Comm: syz.0.29 Not tainted syzkaller #0 [ 71.696372][ T4713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.697820][ T4713] Call trace: [ 71.698336][ T4713] dump_backtrace+0x0/0x458 [ 71.699158][ T4713] show_stack+0x2c/0x3c [ 71.699843][ T4713] __dump_stack+0x30/0x40 [ 71.700581][ T4713] dump_stack_lvl+0xf4/0x15c [ 71.701331][ T4713] dump_stack+0x1c/0x5c [ 71.702004][ T4713] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.702924][ T4713] dccp_xmit_packet+0x298/0x460 [ 71.703685][ T4713] dccp_write_xmit+0x118/0x1d0 [ 71.704415][ T4713] dccp_sendmsg+0x510/0x850 [ 71.705115][ T4713] inet_sendmsg+0x154/0x27c [ 71.705826][ T4713] __sys_sendto+0x30c/0x420 [ 71.706516][ T4713] __arm64_sys_sendto+0xe4/0x104 [ 71.707341][ T4713] invoke_syscall+0x98/0x28c [ 71.708041][ T4713] el0_svc_common+0x13c/0x258 [ 71.708808][ T4713] do_el0_svc+0x5c/0x140 [ 71.709465][ T4713] el0_svc+0x78/0x1d0 [ 71.710143][ T4713] el0t_64_sync_handler+0xcc/0xe4 [ 71.710991][ T4713] el0t_64_sync+0x1a0/0x1a4 [ 71.712102][ T4713] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.713936][ T4713] CPU: 1 PID: 4713 Comm: syz.0.29 Not tainted syzkaller #0 [ 71.715063][ T4713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.716590][ T4713] Call trace: [ 71.717076][ T4713] dump_backtrace+0x0/0x458 [ 71.717786][ T4713] show_stack+0x2c/0x3c [ 71.718438][ T4713] __dump_stack+0x30/0x40 [ 71.719158][ T4713] dump_stack_lvl+0xf4/0x15c [ 71.719899][ T4713] dump_stack+0x1c/0x5c [ 71.720632][ T4713] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.721546][ T4713] dccp_xmit_packet+0x298/0x460 [ 71.722272][ T4713] dccp_write_xmit+0x118/0x1d0 [ 71.722998][ T4713] dccp_sendmsg+0x510/0x850 [ 71.723678][ T4713] inet_sendmsg+0x154/0x27c [ 71.724384][ T4713] __sys_sendto+0x30c/0x420 [ 71.725134][ T4713] __arm64_sys_sendto+0xe4/0x104 [ 71.725894][ T4713] invoke_syscall+0x98/0x28c [ 71.726620][ T4713] el0_svc_common+0x13c/0x258 [ 71.727410][ T4713] do_el0_svc+0x5c/0x140 [ 71.728109][ T4713] el0_svc+0x78/0x1d0 [ 71.728741][ T4713] el0t_64_sync_handler+0xcc/0xe4 [ 71.729592][ T4713] el0t_64_sync+0x1a0/0x1a4 [ 71.731158][ T4713] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.732780][ T4713] CPU: 1 PID: 4713 Comm: syz.0.29 Not tainted syzkaller #0 [ 71.733868][ T4713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.735410][ T4713] Call trace: [ 71.735903][ T4713] dump_backtrace+0x0/0x458 [ 71.736593][ T4713] show_stack+0x2c/0x3c [ 71.737266][ T4713] __dump_stack+0x30/0x40 [ 71.737904][ T4713] dump_stack_lvl+0xf4/0x15c [ 71.738275][ T136] device veth1_macvtap left promiscuous mode [ 71.738671][ T4713] dump_stack+0x1c/0x5c [ 71.738687][ T4713] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.739579][ T136] device veth0_macvtap left promiscuous mode [ 71.740280][ T4713] dccp_xmit_packet+0x298/0x460 [ 71.741169][ T136] device veth1_vlan left promiscuous mode [ 71.742207][ T4713] dccp_write_xmit+0x118/0x1d0 [ 71.743011][ T136] device veth0_vlan left promiscuous mode [ 71.743818][ T4713] dccp_sendmsg+0x510/0x850 [ 71.746190][ T4713] inet_sendmsg+0x154/0x27c [ 71.746883][ T4713] __sys_sendto+0x30c/0x420 [ 71.747663][ T4713] __arm64_sys_sendto+0xe4/0x104 [ 71.748505][ T4713] invoke_syscall+0x98/0x28c [ 71.749215][ T4713] el0_svc_common+0x13c/0x258 [ 71.750063][ T4713] do_el0_svc+0x5c/0x140 [ 71.750744][ T4713] el0_svc+0x78/0x1d0 [ 71.751387][ T4713] el0t_64_sync_handler+0xcc/0xe4 [ 71.752118][ T4713] el0t_64_sync+0x1a0/0x1a4 [ 71.753231][ T4713] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.754958][ T4713] CPU: 1 PID: 4713 Comm: syz.0.29 Not tainted syzkaller #0 [ 71.756043][ T4713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.757519][ T4713] Call trace: [ 71.757982][ T4713] dump_backtrace+0x0/0x458 [ 71.758832][ T4713] show_stack+0x2c/0x3c [ 71.759510][ T4713] __dump_stack+0x30/0x40 [ 71.760249][ T4713] dump_stack_lvl+0xf4/0x15c [ 71.761030][ T4713] dump_stack+0x1c/0x5c [ 71.761719][ T4713] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.762620][ T4713] dccp_xmit_packet+0x298/0x460 [ 71.763408][ T4713] dccp_write_xmit+0x118/0x1d0 [ 71.764156][ T4713] dccp_sendmsg+0x510/0x850 [ 71.764842][ T4713] inet_sendmsg+0x154/0x27c [ 71.765574][ T4713] __sys_sendto+0x30c/0x420 [ 71.766336][ T4713] __arm64_sys_sendto+0xe4/0x104 [ 71.767171][ T4713] invoke_syscall+0x98/0x28c [ 71.767974][ T4713] el0_svc_common+0x13c/0x258 [ 71.768737][ T4713] do_el0_svc+0x5c/0x140 [ 71.769462][ T4713] el0_svc+0x78/0x1d0 [ 71.770163][ T4713] el0t_64_sync_handler+0xcc/0xe4 [ 71.770997][ T4713] el0t_64_sync+0x1a0/0x1a4 [ 71.771847][ T21] Bluetooth: hci0: command 0x0419 tx timeout [ 71.772877][ T4713] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.774564][ T4713] CPU: 1 PID: 4713 Comm: syz.0.29 Not tainted syzkaller #0 [ 71.775614][ T4713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.777243][ T4713] Call trace: [ 71.777760][ T4713] dump_backtrace+0x0/0x458 [ 71.778495][ T4713] show_stack+0x2c/0x3c [ 71.779207][ T4713] __dump_stack+0x30/0x40 [ 71.779940][ T4713] dump_stack_lvl+0xf4/0x15c [ 71.780762][ T4713] dump_stack+0x1c/0x5c [ 71.781527][ T4713] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.782418][ T4713] dccp_xmit_packet+0x298/0x460 [ 71.783158][ T4713] dccp_write_xmit+0x118/0x1d0 [ 71.783867][ T4713] dccp_sendmsg+0x510/0x850 [ 71.784585][ T4713] inet_sendmsg+0x154/0x27c [ 71.785311][ T4713] __sys_sendto+0x30c/0x420 [ 71.786018][ T4713] __arm64_sys_sendto+0xe4/0x104 [ 71.786815][ T4713] invoke_syscall+0x98/0x28c [ 71.787556][ T4713] el0_svc_common+0x13c/0x258 [ 71.788386][ T4713] do_el0_svc+0x5c/0x140 [ 71.789062][ T4713] el0_svc+0x78/0x1d0 [ 71.789723][ T4713] el0t_64_sync_handler+0xcc/0xe4 [ 71.790481][ T4713] el0t_64_sync+0x1a0/0x1a4 [ 71.791368][ T4713] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.792995][ T4713] CPU: 1 PID: 4713 Comm: syz.0.29 Not tainted syzkaller #0 [ 71.794009][ T4713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.795434][ T4713] Call trace: [ 71.795917][ T4713] dump_backtrace+0x0/0x458 [ 71.796571][ T4713] show_stack+0x2c/0x3c [ 71.797246][ T4713] __dump_stack+0x30/0x40 [ 71.797934][ T4713] dump_stack_lvl+0xf4/0x15c [ 71.798674][ T4713] dump_stack+0x1c/0x5c [ 71.799312][ T4713] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.800229][ T4713] dccp_xmit_packet+0x298/0x460 [ 71.800966][ T4713] dccp_write_xmit+0x118/0x1d0 [ 71.801700][ T4713] dccp_sendmsg+0x510/0x850 [ 71.802399][ T4713] inet_sendmsg+0x154/0x27c [ 71.803046][ T4713] __sys_sendto+0x30c/0x420 [ 71.803722][ T4713] __arm64_sys_sendto+0xe4/0x104 [ 71.804473][ T4713] invoke_syscall+0x98/0x28c [ 71.805293][ T4713] el0_svc_common+0x13c/0x258 [ 71.806001][ T4713] do_el0_svc+0x5c/0x140 [ 71.806701][ T4713] el0_svc+0x78/0x1d0 [ 71.807307][ T4713] el0t_64_sync_handler+0xcc/0xe4 [ 71.808092][ T4713] el0t_64_sync+0x1a0/0x1a4 [ 71.809078][ T4713] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.810638][ T4713] CPU: 1 PID: 4713 Comm: syz.0.29 Not tainted syzkaller #0 [ 71.811837][ T4713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.813306][ T4713] Call trace: [ 71.813822][ T4713] dump_backtrace+0x0/0x458 [ 71.814501][ T4713] show_stack+0x2c/0x3c [ 71.815138][ T4713] __dump_stack+0x30/0x40 [ 71.815769][ T4713] dump_stack_lvl+0xf4/0x15c [ 71.816437][ T4713] dump_stack+0x1c/0x5c [ 71.817153][ T4713] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.818076][ T4713] dccp_xmit_packet+0x298/0x460 [ 71.818982][ T4713] dccp_write_xmit+0x118/0x1d0 [ 71.819736][ T4713] dccp_sendmsg+0x510/0x850 [ 71.820544][ T4713] inet_sendmsg+0x154/0x27c [ 71.821420][ T4713] __sys_sendto+0x30c/0x420 [ 71.822285][ T4713] __arm64_sys_sendto+0xe4/0x104 [ 71.823099][ T4713] invoke_syscall+0x98/0x28c [ 71.823834][ T4713] el0_svc_common+0x13c/0x258 [ 71.824509][ T4713] do_el0_svc+0x5c/0x140 [ 71.825312][ T4713] el0_svc+0x78/0x1d0 [ 71.825939][ T4713] el0t_64_sync_handler+0xcc/0xe4 [ 71.826803][ T4713] el0t_64_sync+0x1a0/0x1a4 [ 71.827801][ T4713] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.829662][ T4713] CPU: 1 PID: 4713 Comm: syz.0.29 Not tainted syzkaller #0 [ 71.830742][ T4713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.832103][ T4713] Call trace: [ 71.832632][ T4713] dump_backtrace+0x0/0x458 [ 71.833335][ T4713] show_stack+0x2c/0x3c [ 71.833999][ T4713] __dump_stack+0x30/0x40 [ 71.834799][ T4713] dump_stack_lvl+0xf4/0x15c [ 71.835476][ T4713] dump_stack+0x1c/0x5c [ 71.836092][ T4713] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.836935][ T4713] dccp_xmit_packet+0x298/0x460 [ 71.837637][ T4713] dccp_write_xmit+0x118/0x1d0 [ 71.838401][ T4713] dccp_sendmsg+0x510/0x850 [ 71.839090][ T4713] inet_sendmsg+0x154/0x27c [ 71.839808][ T4713] __sys_sendto+0x30c/0x420 [ 71.840518][ T4713] __arm64_sys_sendto+0xe4/0x104 [ 71.841280][ T4713] invoke_syscall+0x98/0x28c [ 71.842006][ T4713] el0_svc_common+0x13c/0x258 [ 71.842719][ T4713] do_el0_svc+0x5c/0x140 [ 71.843448][ T4713] el0_svc+0x78/0x1d0 [ 71.844157][ T4713] el0t_64_sync_handler+0xcc/0xe4 [ 71.844945][ T4713] el0t_64_sync+0x1a0/0x1a4 [ 71.845848][ T4713] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.847490][ T4713] CPU: 1 PID: 4713 Comm: syz.0.29 Not tainted syzkaller #0 [ 71.848569][ T4713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.850108][ T4713] Call trace: [ 71.850684][ T4713] dump_backtrace+0x0/0x458 [ 71.851385][ T4713] show_stack+0x2c/0x3c [ 71.852116][ T4713] __dump_stack+0x30/0x40 [ 71.852839][ T4713] dump_stack_lvl+0xf4/0x15c [ 71.853601][ T4713] dump_stack+0x1c/0x5c [ 71.854329][ T4713] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.855317][ T4713] dccp_xmit_packet+0x298/0x460 [ 71.856076][ T4713] dccp_write_xmit+0x118/0x1d0 [ 71.856832][ T4713] dccp_sendmsg+0x510/0x850 [ 71.857577][ T4713] inet_sendmsg+0x154/0x27c [ 71.858325][ T4713] __sys_sendto+0x30c/0x420 [ 71.859005][ T4713] __arm64_sys_sendto+0xe4/0x104 [ 71.859781][ T4713] invoke_syscall+0x98/0x28c [ 71.860455][ T4713] el0_svc_common+0x13c/0x258 [ 71.861144][ T4713] do_el0_svc+0x5c/0x140 [ 71.861816][ T4713] el0_svc+0x78/0x1d0 [ 71.862419][ T4713] el0t_64_sync_handler+0xcc/0xe4 [ 71.863151][ T4713] el0t_64_sync+0x1a0/0x1a4 [ 71.863984][ T4713] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.865613][ T4713] CPU: 1 PID: 4713 Comm: syz.0.29 Not tainted syzkaller #0 [ 71.866660][ T4713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.868156][ T4713] Call trace: [ 71.868717][ T4713] dump_backtrace+0x0/0x458 [ 71.869508][ T4713] show_stack+0x2c/0x3c [ 71.870206][ T4713] __dump_stack+0x30/0x40 [ 71.870905][ T4713] dump_stack_lvl+0xf4/0x15c [ 71.871602][ T4713] dump_stack+0x1c/0x5c [ 71.872281][ T4713] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.873233][ T4713] dccp_xmit_packet+0x298/0x460 [ 71.874059][ T4713] dccp_write_xmit+0x118/0x1d0 [ 71.874876][ T4713] dccp_sendmsg+0x510/0x850 [ 71.875626][ T4713] inet_sendmsg+0x154/0x27c [ 71.876356][ T4713] __sys_sendto+0x30c/0x420 [ 71.877063][ T4713] __arm64_sys_sendto+0xe4/0x104 [ 71.877842][ T4713] invoke_syscall+0x98/0x28c [ 71.878589][ T4713] el0_svc_common+0x13c/0x258 [ 71.879345][ T4713] do_el0_svc+0x5c/0x140 [ 71.880037][ T4713] el0_svc+0x78/0x1d0 [ 71.880679][ T4713] el0t_64_sync_handler+0xcc/0xe4 [ 71.881504][ T4713] el0t_64_sync+0x1a0/0x1a4 [ 71.882438][ T4713] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.884079][ T4713] CPU: 1 PID: 4713 Comm: syz.0.29 Not tainted syzkaller #0 [ 71.885202][ T4713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.886628][ T4713] Call trace: [ 71.887153][ T4713] dump_backtrace+0x0/0x458 [ 71.887854][ T4713] show_stack+0x2c/0x3c [ 71.888539][ T4713] __dump_stack+0x30/0x40 [ 71.889213][ T4713] dump_stack_lvl+0xf4/0x15c [ 71.889926][ T4713] dump_stack+0x1c/0x5c [ 71.890640][ T4713] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.891492][ T4713] dccp_xmit_packet+0x298/0x460 [ 71.892297][ T4713] dccp_write_xmit+0x118/0x1d0 [ 71.893082][ T4713] dccp_sendmsg+0x510/0x850 [ 71.893806][ T4713] inet_sendmsg+0x154/0x27c [ 71.894534][ T4713] __sys_sendto+0x30c/0x420 [ 71.895250][ T4713] __arm64_sys_sendto+0xe4/0x104 [ 71.896077][ T4713] invoke_syscall+0x98/0x28c [ 71.896792][ T4713] el0_svc_common+0x13c/0x258 [ 71.897621][ T4713] do_el0_svc+0x5c/0x140 [ 71.898284][ T4713] el0_svc+0x78/0x1d0 [ 71.898966][ T4713] el0t_64_sync_handler+0xcc/0xe4 [ 71.899797][ T4713] el0t_64_sync+0x1a0/0x1a4 [ 71.900702][ T4713] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.902339][ T4713] CPU: 1 PID: 4713 Comm: syz.0.29 Not tainted syzkaller #0 [ 71.903428][ T4713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.905078][ T4713] Call trace: [ 71.905607][ T4713] dump_backtrace+0x0/0x458 [ 71.906366][ T4713] show_stack+0x2c/0x3c [ 71.907054][ T4713] __dump_stack+0x30/0x40 [ 71.907759][ T4713] dump_stack_lvl+0xf4/0x15c [ 71.908483][ T4713] dump_stack+0x1c/0x5c [ 71.909156][ T4713] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.910071][ T4713] dccp_xmit_packet+0x298/0x460 [ 71.910825][ T4713] dccp_write_xmit+0x118/0x1d0 [ 71.911582][ T4713] dccp_sendmsg+0x510/0x850 [ 71.912426][ T4713] inet_sendmsg+0x154/0x27c [ 71.913193][ T4713] __sys_sendto+0x30c/0x420 [ 71.913941][ T4713] __arm64_sys_sendto+0xe4/0x104 [ 71.914721][ T4713] invoke_syscall+0x98/0x28c [ 71.915474][ T4713] el0_svc_common+0x13c/0x258 [ 71.916175][ T4713] do_el0_svc+0x5c/0x140 [ 71.916818][ T4713] el0_svc+0x78/0x1d0 [ 71.917413][ T4713] el0t_64_sync_handler+0xcc/0xe4 [ 71.918322][ T4713] el0t_64_sync+0x1a0/0x1a4 [ 71.919400][ T4713] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.921009][ T4713] CPU: 1 PID: 4713 Comm: syz.0.29 Not tainted syzkaller #0 [ 71.922086][ T4713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.923732][ T4713] Call trace: [ 71.924204][ T4713] dump_backtrace+0x0/0x458 [ 71.924966][ T4713] show_stack+0x2c/0x3c [ 71.925621][ T4713] __dump_stack+0x30/0x40 [ 71.926273][ T4713] dump_stack_lvl+0xf4/0x15c [ 71.926982][ T4713] dump_stack+0x1c/0x5c [ 71.927590][ T4713] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.928440][ T4713] dccp_xmit_packet+0x298/0x460 [ 71.929266][ T4713] dccp_write_xmit+0x118/0x1d0 [ 71.930080][ T4713] dccp_sendmsg+0x510/0x850 [ 71.930782][ T4713] inet_sendmsg+0x154/0x27c [ 71.931524][ T4713] __sys_sendto+0x30c/0x420 [ 71.932143][ T4713] __arm64_sys_sendto+0xe4/0x104 [ 71.932967][ T4713] invoke_syscall+0x98/0x28c [ 71.933693][ T4713] el0_svc_common+0x13c/0x258 [ 71.934372][ T4713] do_el0_svc+0x5c/0x140 [ 71.935075][ T4713] el0_svc+0x78/0x1d0 [ 71.935727][ T4713] el0t_64_sync_handler+0xcc/0xe4 [ 71.936536][ T4713] el0t_64_sync+0x1a0/0x1a4 [ 71.937561][ T4713] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.939333][ T4713] CPU: 1 PID: 4713 Comm: syz.0.29 Not tainted syzkaller #0 [ 71.940422][ T4713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.941831][ T4713] Call trace: [ 71.942369][ T4713] dump_backtrace+0x0/0x458 [ 71.943050][ T4713] show_stack+0x2c/0x3c [ 71.943807][ T4713] __dump_stack+0x30/0x40 [ 71.944484][ T4713] dump_stack_lvl+0xf4/0x15c [ 71.945171][ T4713] dump_stack+0x1c/0x5c [ 71.945877][ T4713] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 71.946718][ T4713] dccp_xmit_packet+0x298/0x460 [ 71.947492][ T4713] dccp_write_xmit+0x118/0x1d0 [ 71.948161][ T4713] dccp_sendmsg+0x510/0x850 [ 71.948883][ T4713] inet_sendmsg+0x154/0x27c [ 71.949529][ T4713] __sys_sendto+0x30c/0x420 [ 71.950238][ T4713] __arm64_sys_sendto+0xe4/0x104 [ 71.950986][ T4713] invoke_syscall+0x98/0x28c [ 71.951765][ T4713] el0_svc_common+0x13c/0x258 [ 71.952538][ T4713] do_el0_svc+0x5c/0x140 [ 71.953230][ T4713] el0_svc+0x78/0x1d0 [ 71.954026][ T4713] el0t_64_sync_handler+0xcc/0xe4 [ 71.954927][ T4713] el0t_64_sync+0x1a0/0x1a4 [ 71.992556][ T4715] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 71.994601][ T4715] CPU: 0 PID: 4715 Comm: syz.0.30 Not tainted syzkaller #0 [ 71.995675][ T4715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.997276][ T4715] Call trace: [ 71.997815][ T4715] dump_backtrace+0x0/0x458 [ 71.998612][ T4715] show_stack+0x2c/0x3c [ 71.999370][ T4715] __dump_stack+0x30/0x40 [ 72.000170][ T4715] dump_stack_lvl+0xf4/0x15c [ 72.000953][ T4715] dump_stack+0x1c/0x5c [ 72.001756][ T4715] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.002852][ T4715] dccp_xmit_packet+0x298/0x460 [ 72.003652][ T4715] dccp_write_xmit+0x118/0x1d0 [ 72.004491][ T4715] dccp_sendmsg+0x510/0x850 [ 72.005206][ T4715] inet_sendmsg+0x154/0x27c [ 72.005998][ T4715] __sys_sendto+0x30c/0x420 [ 72.006910][ T4715] __arm64_sys_sendto+0xe4/0x104 [ 72.007888][ T4715] invoke_syscall+0x98/0x28c [ 72.008713][ T4715] el0_svc_common+0x13c/0x258 [ 72.009559][ T4715] do_el0_svc+0x5c/0x140 [ 72.010412][ T4715] el0_svc+0x78/0x1d0 [ 72.011128][ T4715] el0t_64_sync_handler+0xcc/0xe4 [ 72.012056][ T4715] el0t_64_sync+0x1a0/0x1a4 [ 72.013811][ T136] team0 (unregistering): Port device team_slave_1 removed [ 72.015734][ T4715] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.017758][ T4715] CPU: 0 PID: 4715 Comm: syz.0.30 Not tainted syzkaller #0 [ 72.018974][ T4715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.020804][ T4715] Call trace: [ 72.021384][ T4715] dump_backtrace+0x0/0x458 [ 72.022121][ T4715] show_stack+0x2c/0x3c [ 72.022838][ T4715] __dump_stack+0x30/0x40 [ 72.023613][ T4715] dump_stack_lvl+0xf4/0x15c [ 72.024477][ T4715] dump_stack+0x1c/0x5c [ 72.025135][ T4715] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.025983][ T4715] dccp_xmit_packet+0x298/0x460 [ 72.026773][ T4715] dccp_write_xmit+0x118/0x1d0 [ 72.027580][ T4715] dccp_sendmsg+0x510/0x850 [ 72.028351][ T4715] inet_sendmsg+0x154/0x27c [ 72.029252][ T4715] __sys_sendto+0x30c/0x420 [ 72.030174][ T4715] __arm64_sys_sendto+0xe4/0x104 [ 72.031202][ T4715] invoke_syscall+0x98/0x28c [ 72.032119][ T4715] el0_svc_common+0x13c/0x258 [ 72.032906][ T4715] do_el0_svc+0x5c/0x140 [ 72.033619][ T4715] el0_svc+0x78/0x1d0 [ 72.034267][ T4715] el0t_64_sync_handler+0xcc/0xe4 [ 72.035162][ T4715] el0t_64_sync+0x1a0/0x1a4 [ 72.036379][ T136] team0 (unregistering): Port device team_slave_0 removed [ 72.039542][ T4715] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.041559][ T4715] CPU: 0 PID: 4715 Comm: syz.0.30 Not tainted syzkaller #0 [ 72.042777][ T4715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.044624][ T4715] Call trace: [ 72.045203][ T4715] dump_backtrace+0x0/0x458 [ 72.046013][ T4715] show_stack+0x2c/0x3c [ 72.046723][ T4715] __dump_stack+0x30/0x40 [ 72.047412][ T4715] dump_stack_lvl+0xf4/0x15c [ 72.048260][ T4715] dump_stack+0x1c/0x5c [ 72.049020][ T4715] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.049998][ T4715] dccp_xmit_packet+0x298/0x460 [ 72.050931][ T4715] dccp_write_xmit+0x118/0x1d0 [ 72.051787][ T4715] dccp_sendmsg+0x510/0x850 [ 72.052565][ T4715] inet_sendmsg+0x154/0x27c [ 72.053316][ T4715] __sys_sendto+0x30c/0x420 [ 72.054125][ T4715] __arm64_sys_sendto+0xe4/0x104 [ 72.054936][ T4715] invoke_syscall+0x98/0x28c [ 72.055705][ T4715] el0_svc_common+0x13c/0x258 [ 72.056482][ T4715] do_el0_svc+0x5c/0x140 [ 72.057171][ T4715] el0_svc+0x78/0x1d0 [ 72.057816][ T4715] el0t_64_sync_handler+0xcc/0xe4 [ 72.058779][ T4715] el0t_64_sync+0x1a0/0x1a4 [ 72.061027][ T4715] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.061051][ T136] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 72.062979][ T4715] CPU: 0 PID: 4715 Comm: syz.0.30 Not tainted syzkaller #0 [ 72.065506][ T4715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.067348][ T4715] Call trace: [ 72.067980][ T4715] dump_backtrace+0x0/0x458 [ 72.068886][ T4715] show_stack+0x2c/0x3c [ 72.069693][ T4715] __dump_stack+0x30/0x40 [ 72.070493][ T4715] dump_stack_lvl+0xf4/0x15c [ 72.071330][ T4715] dump_stack+0x1c/0x5c [ 72.072092][ T4715] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.073088][ T4715] dccp_xmit_packet+0x298/0x460 [ 72.073921][ T4715] dccp_write_xmit+0x118/0x1d0 [ 72.074794][ T4715] dccp_sendmsg+0x510/0x850 [ 72.075621][ T4715] inet_sendmsg+0x154/0x27c [ 72.076482][ T4715] __sys_sendto+0x30c/0x420 [ 72.077330][ T4715] __arm64_sys_sendto+0xe4/0x104 [ 72.078249][ T4715] invoke_syscall+0x98/0x28c [ 72.079023][ T4715] el0_svc_common+0x13c/0x258 [ 72.079824][ T4715] do_el0_svc+0x5c/0x140 [ 72.080570][ T4715] el0_svc+0x78/0x1d0 [ 72.081258][ T4715] el0t_64_sync_handler+0xcc/0xe4 [ 72.082146][ T4715] el0t_64_sync+0x1a0/0x1a4 [ 72.083323][ T4715] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.085330][ T4715] CPU: 0 PID: 4715 Comm: syz.0.30 Not tainted syzkaller #0 [ 72.086537][ T4715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.088496][ T4715] Call trace: [ 72.089081][ T4715] dump_backtrace+0x0/0x458 [ 72.089896][ T4715] show_stack+0x2c/0x3c [ 72.090604][ T4715] __dump_stack+0x30/0x40 [ 72.091436][ T4715] dump_stack_lvl+0xf4/0x15c [ 72.092350][ T4715] dump_stack+0x1c/0x5c [ 72.093109][ T4715] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.094072][ T4715] dccp_xmit_packet+0x298/0x460 [ 72.094947][ T4715] dccp_write_xmit+0x118/0x1d0 [ 72.095813][ T4715] dccp_sendmsg+0x510/0x850 [ 72.096661][ T4715] inet_sendmsg+0x154/0x27c [ 72.097475][ T4715] __sys_sendto+0x30c/0x420 [ 72.098340][ T4715] __arm64_sys_sendto+0xe4/0x104 [ 72.099301][ T4715] invoke_syscall+0x98/0x28c [ 72.100115][ T4715] el0_svc_common+0x13c/0x258 [ 72.100960][ T4715] do_el0_svc+0x5c/0x140 [ 72.101783][ T4715] el0_svc+0x78/0x1d0 [ 72.102476][ T4715] el0t_64_sync_handler+0xcc/0xe4 [ 72.103397][ T4715] el0t_64_sync+0x1a0/0x1a4 [ 72.104972][ T4715] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.106834][ T4715] CPU: 0 PID: 4715 Comm: syz.0.30 Not tainted syzkaller #0 [ 72.107955][ T4715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.109668][ T4715] Call trace: [ 72.110198][ T4715] dump_backtrace+0x0/0x458 [ 72.110964][ T4715] show_stack+0x2c/0x3c [ 72.111663][ T4715] __dump_stack+0x30/0x40 [ 72.112366][ T4715] dump_stack_lvl+0xf4/0x15c [ 72.113146][ T4715] dump_stack+0x1c/0x5c [ 72.113830][ T4715] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.114829][ T4715] dccp_xmit_packet+0x298/0x460 [ 72.115742][ T4715] dccp_write_xmit+0x118/0x1d0 [ 72.116492][ T4715] dccp_sendmsg+0x510/0x850 [ 72.117247][ T4715] inet_sendmsg+0x154/0x27c [ 72.118090][ T4715] __sys_sendto+0x30c/0x420 [ 72.118951][ T4715] __arm64_sys_sendto+0xe4/0x104 [ 72.119849][ T4715] invoke_syscall+0x98/0x28c [ 72.120679][ T4715] el0_svc_common+0x13c/0x258 [ 72.121513][ T4715] do_el0_svc+0x5c/0x140 [ 72.122293][ T4715] el0_svc+0x78/0x1d0 [ 72.123070][ T4715] el0t_64_sync_handler+0xcc/0xe4 [ 72.124075][ T4715] el0t_64_sync+0x1a0/0x1a4 [ 72.126199][ T4715] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.127952][ T4715] CPU: 1 PID: 4715 Comm: syz.0.30 Not tainted syzkaller #0 [ 72.129200][ T4715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.130911][ T4715] Call trace: [ 72.131469][ T4715] dump_backtrace+0x0/0x458 [ 72.132305][ T4715] show_stack+0x2c/0x3c [ 72.133015][ T4715] __dump_stack+0x30/0x40 [ 72.133720][ T4715] dump_stack_lvl+0xf4/0x15c [ 72.134528][ T4715] dump_stack+0x1c/0x5c [ 72.135270][ T4715] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.136228][ T4715] dccp_xmit_packet+0x298/0x460 [ 72.136980][ T4715] dccp_write_xmit+0x118/0x1d0 [ 72.137728][ T4715] dccp_sendmsg+0x510/0x850 [ 72.138459][ T4715] inet_sendmsg+0x154/0x27c [ 72.139205][ T4715] __sys_sendto+0x30c/0x420 [ 72.140009][ T4715] __arm64_sys_sendto+0xe4/0x104 [ 72.140790][ T4715] invoke_syscall+0x98/0x28c [ 72.141524][ T4715] el0_svc_common+0x13c/0x258 [ 72.142366][ T4715] do_el0_svc+0x5c/0x140 [ 72.143053][ T4715] el0_svc+0x78/0x1d0 [ 72.143742][ T4715] el0t_64_sync_handler+0xcc/0xe4 [ 72.144587][ T4715] el0t_64_sync+0x1a0/0x1a4 [ 72.146671][ T4715] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.148890][ T4715] CPU: 0 PID: 4715 Comm: syz.0.30 Not tainted syzkaller #0 [ 72.150039][ T4715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.151933][ T4715] Call trace: [ 72.152577][ T4715] dump_backtrace+0x0/0x458 [ 72.153479][ T4715] show_stack+0x2c/0x3c [ 72.154295][ T4715] __dump_stack+0x30/0x40 [ 72.155108][ T4715] dump_stack_lvl+0xf4/0x15c [ 72.155927][ T4715] dump_stack+0x1c/0x5c [ 72.156680][ T4715] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.157596][ T4715] dccp_xmit_packet+0x298/0x460 [ 72.158387][ T4715] dccp_write_xmit+0x118/0x1d0 [ 72.159082][ T4715] dccp_sendmsg+0x510/0x850 [ 72.159849][ T4715] inet_sendmsg+0x154/0x27c [ 72.160688][ T4715] __sys_sendto+0x30c/0x420 [ 72.161496][ T4715] __arm64_sys_sendto+0xe4/0x104 [ 72.162271][ T4715] invoke_syscall+0x98/0x28c [ 72.163020][ T4715] el0_svc_common+0x13c/0x258 [ 72.163869][ T4715] do_el0_svc+0x5c/0x140 [ 72.164628][ T4715] el0_svc+0x78/0x1d0 [ 72.165311][ T4715] el0t_64_sync_handler+0xcc/0xe4 [ 72.166203][ T4715] el0t_64_sync+0x1a0/0x1a4 [ 72.167316][ T4715] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.167791][ T136] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 72.169308][ T4715] CPU: 0 PID: 4715 Comm: syz.0.30 Not tainted syzkaller #0 [ 72.169317][ T4715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.169322][ T4715] Call trace: [ 72.169324][ T4715] dump_backtrace+0x0/0x458 [ 72.169330][ T4715] show_stack+0x2c/0x3c [ 72.169334][ T4715] __dump_stack+0x30/0x40 [ 72.169339][ T4715] dump_stack_lvl+0xf4/0x15c [ 72.169344][ T4715] dump_stack+0x1c/0x5c [ 72.169349][ T4715] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.169354][ T4715] dccp_xmit_packet+0x298/0x460 [ 72.169359][ T4715] dccp_write_xmit+0x118/0x1d0 [ 72.169364][ T4715] dccp_sendmsg+0x510/0x850 [ 72.169369][ T4715] inet_sendmsg+0x154/0x27c [ 72.169374][ T4715] __sys_sendto+0x30c/0x420 [ 72.169379][ T4715] __arm64_sys_sendto+0xe4/0x104 [ 72.169384][ T4715] invoke_syscall+0x98/0x28c [ 72.169388][ T4715] el0_svc_common+0x13c/0x258 [ 72.169393][ T4715] do_el0_svc+0x5c/0x140 [ 72.169398][ T4715] el0_svc+0x78/0x1d0 [ 72.169403][ T4715] el0t_64_sync_handler+0xcc/0xe4 [ 72.169408][ T4715] el0t_64_sync+0x1a0/0x1a4 [ 72.169506][ T4715] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.169515][ T4715] CPU: 0 PID: 4715 Comm: syz.0.30 Not tainted syzkaller #0 [ 72.169520][ T4715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.169523][ T4715] Call trace: [ 72.169525][ T4715] dump_backtrace+0x0/0x458 [ 72.169529][ T4715] show_stack+0x2c/0x3c [ 72.169533][ T4715] __dump_stack+0x30/0x40 [ 72.169537][ T4715] dump_stack_lvl+0xf4/0x15c [ 72.169542][ T4715] dump_stack+0x1c/0x5c [ 72.169547][ T4715] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.169552][ T4715] dccp_xmit_packet+0x298/0x460 [ 72.169556][ T4715] dccp_write_xmit+0x118/0x1d0 [ 72.169561][ T4715] dccp_sendmsg+0x510/0x850 [ 72.169567][ T4715] inet_sendmsg+0x154/0x27c [ 72.169571][ T4715] __sys_sendto+0x30c/0x420 [ 72.169576][ T4715] __arm64_sys_sendto+0xe4/0x104 [ 72.169581][ T4715] invoke_syscall+0x98/0x28c [ 72.169585][ T4715] el0_svc_common+0x13c/0x258 [ 72.169590][ T4715] do_el0_svc+0x5c/0x140 [ 72.169595][ T4715] el0_svc+0x78/0x1d0 [ 72.169600][ T4715] el0t_64_sync_handler+0xcc/0xe4 [ 72.169605][ T4715] el0t_64_sync+0x1a0/0x1a4 [ 72.169689][ T4715] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.169697][ T4715] CPU: 0 PID: 4715 Comm: syz.0.30 Not tainted syzkaller #0 [ 72.169702][ T4715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.169705][ T4715] Call trace: [ 72.169707][ T4715] dump_backtrace+0x0/0x458 [ 72.169711][ T4715] show_stack+0x2c/0x3c [ 72.169715][ T4715] __dump_stack+0x30/0x40 [ 72.169720][ T4715] dump_stack_lvl+0xf4/0x15c [ 72.169725][ T4715] dump_stack+0x1c/0x5c [ 72.169729][ T4715] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.169734][ T4715] dccp_xmit_packet+0x298/0x460 [ 72.169739][ T4715] dccp_write_xmit+0x118/0x1d0 [ 72.169744][ T4715] dccp_sendmsg+0x510/0x850 [ 72.169749][ T4715] inet_sendmsg+0x154/0x27c [ 72.169753][ T4715] __sys_sendto+0x30c/0x420 [ 72.169758][ T4715] __arm64_sys_sendto+0xe4/0x104 [ 72.169763][ T4715] invoke_syscall+0x98/0x28c [ 72.169767][ T4715] el0_svc_common+0x13c/0x258 [ 72.225021][ T4715] do_el0_svc+0x5c/0x140 [ 72.225772][ T4715] el0_svc+0x78/0x1d0 [ 72.226505][ T4715] el0t_64_sync_handler+0xcc/0xe4 [ 72.227463][ T4715] el0t_64_sync+0x1a0/0x1a4 [ 72.229138][ T4715] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.231014][ T4715] CPU: 0 PID: 4715 Comm: syz.0.30 Not tainted syzkaller #0 [ 72.232179][ T4715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.233825][ T4715] Call trace: [ 72.234340][ T4715] dump_backtrace+0x0/0x458 [ 72.235057][ T4715] show_stack+0x2c/0x3c [ 72.235698][ T4715] __dump_stack+0x30/0x40 [ 72.236405][ T4715] dump_stack_lvl+0xf4/0x15c [ 72.237149][ T4715] dump_stack+0x1c/0x5c [ 72.237854][ T4715] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.238787][ T4715] dccp_xmit_packet+0x298/0x460 [ 72.239596][ T4715] dccp_write_xmit+0x118/0x1d0 [ 72.240375][ T4715] dccp_sendmsg+0x510/0x850 [ 72.241140][ T4715] inet_sendmsg+0x154/0x27c [ 72.241917][ T4715] __sys_sendto+0x30c/0x420 [ 72.242672][ T4715] __arm64_sys_sendto+0xe4/0x104 [ 72.243538][ T4715] invoke_syscall+0x98/0x28c [ 72.244363][ T4715] el0_svc_common+0x13c/0x258 [ 72.245200][ T4715] do_el0_svc+0x5c/0x140 [ 72.245961][ T4715] el0_svc+0x78/0x1d0 [ 72.246621][ T4715] el0t_64_sync_handler+0xcc/0xe4 [ 72.247502][ T4715] el0t_64_sync+0x1a0/0x1a4 [ 72.248765][ T4715] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.250637][ T4715] CPU: 0 PID: 4715 Comm: syz.0.30 Not tainted syzkaller #0 [ 72.251717][ T4715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.253397][ T4715] Call trace: [ 72.253976][ T4715] dump_backtrace+0x0/0x458 [ 72.254782][ T4715] show_stack+0x2c/0x3c [ 72.255534][ T4715] __dump_stack+0x30/0x40 [ 72.256220][ T4715] dump_stack_lvl+0xf4/0x15c [ 72.256981][ T4715] dump_stack+0x1c/0x5c [ 72.257706][ T4715] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.258719][ T4715] dccp_xmit_packet+0x298/0x460 [ 72.259590][ T4715] dccp_write_xmit+0x118/0x1d0 [ 72.260360][ T4715] dccp_sendmsg+0x510/0x850 [ 72.261100][ T4715] inet_sendmsg+0x154/0x27c [ 72.261873][ T4715] __sys_sendto+0x30c/0x420 [ 72.262603][ T4715] __arm64_sys_sendto+0xe4/0x104 [ 72.263394][ T4715] invoke_syscall+0x98/0x28c [ 72.264202][ T4715] el0_svc_common+0x13c/0x258 [ 72.264996][ T4715] do_el0_svc+0x5c/0x140 [ 72.265800][ T4715] el0_svc+0x78/0x1d0 [ 72.266545][ T4715] el0t_64_sync_handler+0xcc/0xe4 [ 72.267466][ T4715] el0t_64_sync+0x1a0/0x1a4 [ 72.268640][ T4715] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.270429][ T4715] CPU: 0 PID: 4715 Comm: syz.0.30 Not tainted syzkaller #0 [ 72.271638][ T4715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.273272][ T4715] Call trace: [ 72.273788][ T4715] dump_backtrace+0x0/0x458 [ 72.274575][ T4715] show_stack+0x2c/0x3c [ 72.275231][ T4715] __dump_stack+0x30/0x40 [ 72.275889][ T4715] dump_stack_lvl+0xf4/0x15c [ 72.276651][ T4715] dump_stack+0x1c/0x5c [ 72.277363][ T4715] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.278288][ T4715] dccp_xmit_packet+0x298/0x460 [ 72.279174][ T4715] dccp_write_xmit+0x118/0x1d0 [ 72.280002][ T4715] dccp_sendmsg+0x510/0x850 [ 72.280875][ T4715] inet_sendmsg+0x154/0x27c [ 72.281753][ T4715] __sys_sendto+0x30c/0x420 [ 72.282657][ T4715] __arm64_sys_sendto+0xe4/0x104 [ 72.283572][ T4715] invoke_syscall+0x98/0x28c [ 72.284360][ T4715] el0_svc_common+0x13c/0x258 [ 72.285195][ T4715] do_el0_svc+0x5c/0x140 [ 72.285922][ T4715] el0_svc+0x78/0x1d0 [ 72.286634][ T4715] el0t_64_sync_handler+0xcc/0xe4 [ 72.287532][ T4715] el0t_64_sync+0x1a0/0x1a4 [ 72.289705][ T4715] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.291518][ T4715] CPU: 0 PID: 4715 Comm: syz.0.30 Not tainted syzkaller #0 [ 72.292711][ T4715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.294286][ T4715] Call trace: [ 72.294835][ T4715] dump_backtrace+0x0/0x458 [ 72.295531][ T4715] show_stack+0x2c/0x3c [ 72.296208][ T4715] __dump_stack+0x30/0x40 [ 72.296917][ T4715] dump_stack_lvl+0xf4/0x15c [ 72.297626][ T4715] dump_stack+0x1c/0x5c [ 72.298293][ T4715] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.299275][ T4715] dccp_xmit_packet+0x298/0x460 [ 72.300157][ T4715] dccp_write_xmit+0x118/0x1d0 [ 72.301014][ T4715] dccp_sendmsg+0x510/0x850 [ 72.301804][ T4715] inet_sendmsg+0x154/0x27c [ 72.302562][ T4715] __sys_sendto+0x30c/0x420 [ 72.303329][ T4715] __arm64_sys_sendto+0xe4/0x104 [ 72.304164][ T4715] invoke_syscall+0x98/0x28c [ 72.304905][ T4715] el0_svc_common+0x13c/0x258 [ 72.305615][ T4715] do_el0_svc+0x5c/0x140 [ 72.306383][ T4715] el0_svc+0x78/0x1d0 [ 72.307031][ T4715] el0t_64_sync_handler+0xcc/0xe4 [ 72.307834][ T4715] el0t_64_sync+0x1a0/0x1a4 [ 72.310555][ T4715] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.312380][ T4715] CPU: 0 PID: 4715 Comm: syz.0.30 Not tainted syzkaller #0 [ 72.313769][ T4715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.315662][ T4715] Call trace: [ 72.316249][ T4715] dump_backtrace+0x0/0x458 [ 72.317045][ T4715] show_stack+0x2c/0x3c [ 72.317783][ T4715] __dump_stack+0x30/0x40 [ 72.318579][ T4715] dump_stack_lvl+0xf4/0x15c [ 72.319356][ T4715] dump_stack+0x1c/0x5c [ 72.320039][ T4715] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.320972][ T4715] dccp_xmit_packet+0x298/0x460 [ 72.321890][ T4715] dccp_write_xmit+0x118/0x1d0 [ 72.322694][ T4715] dccp_sendmsg+0x510/0x850 [ 72.323524][ T4715] inet_sendmsg+0x154/0x27c [ 72.324340][ T4715] __sys_sendto+0x30c/0x420 [ 72.325137][ T4715] __arm64_sys_sendto+0xe4/0x104 [ 72.325983][ T4715] invoke_syscall+0x98/0x28c [ 72.326775][ T4715] el0_svc_common+0x13c/0x258 [ 72.327597][ T4715] do_el0_svc+0x5c/0x140 [ 72.328344][ T4715] el0_svc+0x78/0x1d0 [ 72.329023][ T4715] el0t_64_sync_handler+0xcc/0xe4 [ 72.329908][ T4715] el0t_64_sync+0x1a0/0x1a4 [ 72.350999][ T4717] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.352739][ T4717] CPU: 0 PID: 4717 Comm: syz.0.31 Not tainted syzkaller #0 [ 72.353666][ T136] bond0 (unregistering): Released all slaves [ 72.353908][ T4717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.356372][ T4717] Call trace: [ 72.356921][ T4717] dump_backtrace+0x0/0x458 [ 72.357604][ T4717] show_stack+0x2c/0x3c [ 72.358274][ T4717] __dump_stack+0x30/0x40 [ 72.359082][ T4717] dump_stack_lvl+0xf4/0x15c [ 72.359893][ T4717] dump_stack+0x1c/0x5c [ 72.360648][ T4717] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.361604][ T4717] dccp_xmit_packet+0x298/0x460 [ 72.362471][ T4717] dccp_write_xmit+0x118/0x1d0 [ 72.363301][ T4717] dccp_sendmsg+0x510/0x850 [ 72.364109][ T4717] inet_sendmsg+0x154/0x27c [ 72.364938][ T4717] __sys_sendto+0x30c/0x420 [ 72.365779][ T4717] __arm64_sys_sendto+0xe4/0x104 [ 72.366620][ T4717] invoke_syscall+0x98/0x28c [ 72.367353][ T4717] el0_svc_common+0x13c/0x258 [ 72.368209][ T4717] do_el0_svc+0x5c/0x140 [ 72.368910][ T4717] el0_svc+0x78/0x1d0 [ 72.369596][ T4717] el0t_64_sync_handler+0xcc/0xe4 [ 72.370428][ T4717] el0t_64_sync+0x1a0/0x1a4 [ 72.371891][ T4717] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.373703][ T4717] CPU: 0 PID: 4717 Comm: syz.0.31 Not tainted syzkaller #0 [ 72.374886][ T4717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.376502][ T4717] Call trace: [ 72.377099][ T4717] dump_backtrace+0x0/0x458 [ 72.377847][ T4717] show_stack+0x2c/0x3c [ 72.378591][ T4717] __dump_stack+0x30/0x40 [ 72.379347][ T4717] dump_stack_lvl+0xf4/0x15c [ 72.380124][ T4717] dump_stack+0x1c/0x5c [ 72.380905][ T4717] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.381836][ T4717] dccp_xmit_packet+0x298/0x460 [ 72.382633][ T4717] dccp_write_xmit+0x118/0x1d0 [ 72.383415][ T4717] dccp_sendmsg+0x510/0x850 [ 72.384170][ T4717] inet_sendmsg+0x154/0x27c [ 72.384906][ T4717] __sys_sendto+0x30c/0x420 [ 72.385662][ T4717] __arm64_sys_sendto+0xe4/0x104 [ 72.386456][ T4717] invoke_syscall+0x98/0x28c [ 72.387217][ T4717] el0_svc_common+0x13c/0x258 [ 72.388049][ T4717] do_el0_svc+0x5c/0x140 [ 72.388763][ T4717] el0_svc+0x78/0x1d0 [ 72.389415][ T4717] el0t_64_sync_handler+0xcc/0xe4 [ 72.390254][ T4717] el0t_64_sync+0x1a0/0x1a4 [ 72.392302][ T4717] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.394023][ T4717] CPU: 0 PID: 4717 Comm: syz.0.31 Not tainted syzkaller #0 [ 72.395121][ T4717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.396612][ T4717] Call trace: [ 72.397063][ T4717] dump_backtrace+0x0/0x458 [ 72.397733][ T4717] show_stack+0x2c/0x3c [ 72.398488][ T4717] __dump_stack+0x30/0x40 [ 72.399328][ T4717] dump_stack_lvl+0xf4/0x15c [ 72.400188][ T4717] dump_stack+0x1c/0x5c [ 72.400989][ T4717] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.401936][ T4717] dccp_xmit_packet+0x298/0x460 [ 72.402866][ T4717] dccp_write_xmit+0x118/0x1d0 [ 72.403758][ T4717] dccp_sendmsg+0x510/0x850 [ 72.404624][ T4717] inet_sendmsg+0x154/0x27c [ 72.405430][ T4717] __sys_sendto+0x30c/0x420 [ 72.406218][ T4717] __arm64_sys_sendto+0xe4/0x104 [ 72.407123][ T4717] invoke_syscall+0x98/0x28c [ 72.407939][ T4717] el0_svc_common+0x13c/0x258 [ 72.408765][ T4717] do_el0_svc+0x5c/0x140 [ 72.409457][ T4717] el0_svc+0x78/0x1d0 [ 72.410178][ T4717] el0t_64_sync_handler+0xcc/0xe4 [ 72.411057][ T4717] el0t_64_sync+0x1a0/0x1a4 [ 72.412381][ T4717] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.414161][ T4717] CPU: 0 PID: 4717 Comm: syz.0.31 Not tainted syzkaller #0 [ 72.415399][ T4717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.417151][ T4717] Call trace: [ 72.417703][ T4717] dump_backtrace+0x0/0x458 [ 72.418493][ T4717] show_stack+0x2c/0x3c [ 72.419223][ T4717] __dump_stack+0x30/0x40 [ 72.419876][ T4717] dump_stack_lvl+0xf4/0x15c [ 72.420627][ T4717] dump_stack+0x1c/0x5c [ 72.421381][ T4717] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.422311][ T4717] dccp_xmit_packet+0x298/0x460 [ 72.423127][ T4717] dccp_write_xmit+0x118/0x1d0 [ 72.423981][ T4717] dccp_sendmsg+0x510/0x850 [ 72.424778][ T4717] inet_sendmsg+0x154/0x27c [ 72.425530][ T4717] __sys_sendto+0x30c/0x420 [ 72.426218][ T4717] __arm64_sys_sendto+0xe4/0x104 [ 72.427029][ T4717] invoke_syscall+0x98/0x28c [ 72.427839][ T4717] el0_svc_common+0x13c/0x258 [ 72.428690][ T4717] do_el0_svc+0x5c/0x140 [ 72.429424][ T4717] el0_svc+0x78/0x1d0 [ 72.430141][ T4717] el0t_64_sync_handler+0xcc/0xe4 [ 72.431034][ T4717] el0t_64_sync+0x1a0/0x1a4 [ 72.434272][ T4717] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.436168][ T4717] CPU: 0 PID: 4717 Comm: syz.0.31 Not tainted syzkaller #0 [ 72.437317][ T4717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.439149][ T4717] Call trace: [ 72.439730][ T4717] dump_backtrace+0x0/0x458 [ 72.440566][ T4717] show_stack+0x2c/0x3c [ 72.441303][ T4717] __dump_stack+0x30/0x40 [ 72.442062][ T4717] dump_stack_lvl+0xf4/0x15c [ 72.442881][ T4717] dump_stack+0x1c/0x5c [ 72.443607][ T4717] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.444576][ T4717] dccp_xmit_packet+0x298/0x460 [ 72.445500][ T4717] dccp_write_xmit+0x118/0x1d0 [ 72.446299][ T4717] dccp_sendmsg+0x510/0x850 [ 72.447057][ T4717] inet_sendmsg+0x154/0x27c [ 72.447788][ T4717] __sys_sendto+0x30c/0x420 [ 72.448482][ T4717] __arm64_sys_sendto+0xe4/0x104 [ 72.449300][ T4717] invoke_syscall+0x98/0x28c [ 72.450178][ T4717] el0_svc_common+0x13c/0x258 [ 72.451014][ T4717] do_el0_svc+0x5c/0x140 [ 72.451743][ T4717] el0_svc+0x78/0x1d0 [ 72.452488][ T4717] el0t_64_sync_handler+0xcc/0xe4 [ 72.453403][ T4717] el0t_64_sync+0x1a0/0x1a4 [ 72.455071][ T4717] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.456819][ T4717] CPU: 0 PID: 4717 Comm: syz.0.31 Not tainted syzkaller #0 [ 72.457954][ T4717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.459706][ T4717] Call trace: [ 72.460247][ T4717] dump_backtrace+0x0/0x458 [ 72.460969][ T4717] show_stack+0x2c/0x3c [ 72.461723][ T4717] __dump_stack+0x30/0x40 [ 72.462483][ T4717] dump_stack_lvl+0xf4/0x15c [ 72.463230][ T4717] dump_stack+0x1c/0x5c [ 72.463880][ T4717] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.464781][ T4717] dccp_xmit_packet+0x298/0x460 [ 72.465641][ T4717] dccp_write_xmit+0x118/0x1d0 [ 72.466607][ T4717] dccp_sendmsg+0x510/0x850 [ 72.467528][ T4717] inet_sendmsg+0x154/0x27c [ 72.468379][ T4717] __sys_sendto+0x30c/0x420 [ 72.469211][ T4717] __arm64_sys_sendto+0xe4/0x104 [ 72.470055][ T4717] invoke_syscall+0x98/0x28c [ 72.470885][ T4717] el0_svc_common+0x13c/0x258 [ 72.471660][ T4717] do_el0_svc+0x5c/0x140 [ 72.472369][ T4717] el0_svc+0x78/0x1d0 [ 72.473050][ T4717] el0t_64_sync_handler+0xcc/0xe4 [ 72.473965][ T4717] el0t_64_sync+0x1a0/0x1a4 [ 72.474978][ T4717] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.476759][ T4717] CPU: 0 PID: 4717 Comm: syz.0.31 Not tainted syzkaller #0 [ 72.477774][ T4717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.479568][ T4717] Call trace: [ 72.480085][ T4717] dump_backtrace+0x0/0x458 [ 72.480796][ T4717] show_stack+0x2c/0x3c [ 72.481479][ T4717] __dump_stack+0x30/0x40 [ 72.482217][ T4717] dump_stack_lvl+0xf4/0x15c [ 72.482984][ T4717] dump_stack+0x1c/0x5c [ 72.483660][ T4717] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.484611][ T4717] dccp_xmit_packet+0x298/0x460 [ 72.485523][ T4717] dccp_write_xmit+0x118/0x1d0 [ 72.486353][ T4717] dccp_sendmsg+0x510/0x850 [ 72.487130][ T4717] inet_sendmsg+0x154/0x27c [ 72.487942][ T4717] __sys_sendto+0x30c/0x420 [ 72.488738][ T4717] __arm64_sys_sendto+0xe4/0x104 [ 72.489603][ T4717] invoke_syscall+0x98/0x28c [ 72.490442][ T4717] el0_svc_common+0x13c/0x258 [ 72.491265][ T4717] do_el0_svc+0x5c/0x140 [ 72.491947][ T4717] el0_svc+0x78/0x1d0 [ 72.492600][ T4717] el0t_64_sync_handler+0xcc/0xe4 [ 72.493445][ T4717] el0t_64_sync+0x1a0/0x1a4 [ 72.494672][ T4717] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.496268][ T4717] CPU: 0 PID: 4717 Comm: syz.0.31 Not tainted syzkaller #0 [ 72.497328][ T4717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.498976][ T4717] Call trace: [ 72.499547][ T4717] dump_backtrace+0x0/0x458 [ 72.500356][ T4717] show_stack+0x2c/0x3c [ 72.501011][ T4717] __dump_stack+0x30/0x40 [ 72.501822][ T4717] dump_stack_lvl+0xf4/0x15c [ 72.502635][ T4717] dump_stack+0x1c/0x5c [ 72.503368][ T4717] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.504264][ T4717] dccp_xmit_packet+0x298/0x460 [ 72.505109][ T4717] dccp_write_xmit+0x118/0x1d0 [ 72.505940][ T4717] dccp_sendmsg+0x510/0x850 [ 72.506731][ T4717] inet_sendmsg+0x154/0x27c [ 72.507501][ T4717] __sys_sendto+0x30c/0x420 [ 72.508312][ T4717] __arm64_sys_sendto+0xe4/0x104 [ 72.509224][ T4717] invoke_syscall+0x98/0x28c [ 72.510034][ T4717] el0_svc_common+0x13c/0x258 [ 72.510883][ T4717] do_el0_svc+0x5c/0x140 [ 72.511644][ T4717] el0_svc+0x78/0x1d0 [ 72.512382][ T4717] el0t_64_sync_handler+0xcc/0xe4 [ 72.513266][ T4717] el0t_64_sync+0x1a0/0x1a4 [ 72.514318][ T4717] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.516024][ T4717] CPU: 0 PID: 4717 Comm: syz.0.31 Not tainted syzkaller #0 [ 72.517151][ T4717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.518860][ T4717] Call trace: [ 72.519405][ T4717] dump_backtrace+0x0/0x458 [ 72.520187][ T4717] show_stack+0x2c/0x3c [ 72.520911][ T4717] __dump_stack+0x30/0x40 [ 72.521662][ T4717] dump_stack_lvl+0xf4/0x15c [ 72.522520][ T4717] dump_stack+0x1c/0x5c [ 72.523263][ T4717] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.524174][ T4717] dccp_xmit_packet+0x298/0x460 [ 72.525037][ T4717] dccp_write_xmit+0x118/0x1d0 [ 72.525861][ T4717] dccp_sendmsg+0x510/0x850 [ 72.526666][ T4717] inet_sendmsg+0x154/0x27c [ 72.527442][ T4717] __sys_sendto+0x30c/0x420 [ 72.528188][ T4717] __arm64_sys_sendto+0xe4/0x104 [ 72.528968][ T4717] invoke_syscall+0x98/0x28c [ 72.529895][ T4717] el0_svc_common+0x13c/0x258 [ 72.530797][ T4717] do_el0_svc+0x5c/0x140 [ 72.531655][ T4717] el0_svc+0x78/0x1d0 [ 72.532437][ T4717] el0t_64_sync_handler+0xcc/0xe4 [ 72.533322][ T4717] el0t_64_sync+0x1a0/0x1a4 [ 72.534449][ T4717] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.536162][ T4717] CPU: 0 PID: 4717 Comm: syz.0.31 Not tainted syzkaller #0 [ 72.537330][ T4717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.539078][ T4717] Call trace: [ 72.539656][ T4717] dump_backtrace+0x0/0x458 [ 72.540437][ T4717] show_stack+0x2c/0x3c [ 72.541195][ T4717] __dump_stack+0x30/0x40 [ 72.541853][ T4717] dump_stack_lvl+0xf4/0x15c [ 72.542629][ T4717] dump_stack+0x1c/0x5c [ 72.543383][ T4717] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.544295][ T4717] dccp_xmit_packet+0x298/0x460 [ 72.545141][ T4717] dccp_write_xmit+0x118/0x1d0 [ 72.546001][ T4717] dccp_sendmsg+0x510/0x850 [ 72.546870][ T4717] inet_sendmsg+0x154/0x27c [ 72.547660][ T4717] __sys_sendto+0x30c/0x420 [ 72.548473][ T4717] __arm64_sys_sendto+0xe4/0x104 [ 72.549489][ T4717] invoke_syscall+0x98/0x28c [ 72.550302][ T4717] el0_svc_common+0x13c/0x258 [ 72.551167][ T4717] do_el0_svc+0x5c/0x140 [ 72.551896][ T4717] el0_svc+0x78/0x1d0 [ 72.552543][ T4717] el0t_64_sync_handler+0xcc/0xe4 [ 72.553409][ T4717] el0t_64_sync+0x1a0/0x1a4 [ 72.554310][ T4717] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.556327][ T4717] CPU: 0 PID: 4717 Comm: syz.0.31 Not tainted syzkaller #0 [ 72.557668][ T4717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.559548][ T4717] Call trace: [ 72.560151][ T4717] dump_backtrace+0x0/0x458 [ 72.561038][ T4717] show_stack+0x2c/0x3c [ 72.561809][ T4717] __dump_stack+0x30/0x40 [ 72.562595][ T4717] dump_stack_lvl+0xf4/0x15c [ 72.563415][ T4717] dump_stack+0x1c/0x5c [ 72.564118][ T4717] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.565041][ T4717] dccp_xmit_packet+0x298/0x460 [ 72.565862][ T4717] dccp_write_xmit+0x118/0x1d0 [ 72.566716][ T4717] dccp_sendmsg+0x510/0x850 [ 72.567553][ T4717] inet_sendmsg+0x154/0x27c [ 72.568310][ T4717] __sys_sendto+0x30c/0x420 [ 72.569083][ T4717] __arm64_sys_sendto+0xe4/0x104 [ 72.569957][ T4717] invoke_syscall+0x98/0x28c [ 72.570867][ T4717] el0_svc_common+0x13c/0x258 [ 72.571734][ T4717] do_el0_svc+0x5c/0x140 [ 72.572615][ T4717] el0_svc+0x78/0x1d0 [ 72.573392][ T4717] el0t_64_sync_handler+0xcc/0xe4 [ 72.574240][ T4717] el0t_64_sync+0x1a0/0x1a4 [ 72.575590][ T4717] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.577332][ T4717] CPU: 0 PID: 4717 Comm: syz.0.31 Not tainted syzkaller #0 [ 72.578587][ T4717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.580430][ T4717] Call trace: [ 72.581001][ T4717] dump_backtrace+0x0/0x458 [ 72.581878][ T4717] show_stack+0x2c/0x3c [ 72.582668][ T4717] __dump_stack+0x30/0x40 [ 72.583458][ T4717] dump_stack_lvl+0xf4/0x15c [ 72.584245][ T4717] dump_stack+0x1c/0x5c [ 72.584929][ T4717] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.585992][ T4717] dccp_xmit_packet+0x298/0x460 [ 72.586839][ T4717] dccp_write_xmit+0x118/0x1d0 [ 72.587659][ T4717] dccp_sendmsg+0x510/0x850 [ 72.588473][ T4717] inet_sendmsg+0x154/0x27c [ 72.589242][ T4717] __sys_sendto+0x30c/0x420 [ 72.590072][ T4717] __arm64_sys_sendto+0xe4/0x104 [ 72.590920][ T4717] invoke_syscall+0x98/0x28c [ 72.591718][ T4717] el0_svc_common+0x13c/0x258 [ 72.592527][ T4717] do_el0_svc+0x5c/0x140 [ 72.593306][ T4717] el0_svc+0x78/0x1d0 [ 72.594038][ T4717] el0t_64_sync_handler+0xcc/0xe4 [ 72.594987][ T4717] el0t_64_sync+0x1a0/0x1a4 [ 72.597063][ T4717] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.598860][ T4717] CPU: 0 PID: 4717 Comm: syz.0.31 Not tainted syzkaller #0 [ 72.599996][ T4717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.601645][ T4717] Call trace: [ 72.602153][ T4717] dump_backtrace+0x0/0x458 [ 72.602892][ T4717] show_stack+0x2c/0x3c [ 72.603598][ T4717] __dump_stack+0x30/0x40 [ 72.604335][ T4717] dump_stack_lvl+0xf4/0x15c [ 72.605059][ T4717] dump_stack+0x1c/0x5c [ 72.605822][ T4717] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.606760][ T4717] dccp_xmit_packet+0x298/0x460 [ 72.607556][ T4717] dccp_write_xmit+0x118/0x1d0 [ 72.608334][ T4717] dccp_sendmsg+0x510/0x850 [ 72.609067][ T4717] inet_sendmsg+0x154/0x27c [ 72.609933][ T4717] __sys_sendto+0x30c/0x420 [ 72.610762][ T4717] __arm64_sys_sendto+0xe4/0x104 [ 72.611647][ T4717] invoke_syscall+0x98/0x28c [ 72.612470][ T4717] el0_svc_common+0x13c/0x258 [ 72.613316][ T4717] do_el0_svc+0x5c/0x140 [ 72.614055][ T4717] el0_svc+0x78/0x1d0 [ 72.614701][ T4717] el0t_64_sync_handler+0xcc/0xe4 [ 72.615554][ T4717] el0t_64_sync+0x1a0/0x1a4 [ 72.616462][ T4717] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.618389][ T4717] CPU: 0 PID: 4717 Comm: syz.0.31 Not tainted syzkaller #0 [ 72.619550][ T4717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.621233][ T4717] Call trace: [ 72.621766][ T4717] dump_backtrace+0x0/0x458 [ 72.622538][ T4717] show_stack+0x2c/0x3c [ 72.623241][ T4717] __dump_stack+0x30/0x40 [ 72.623919][ T4717] dump_stack_lvl+0xf4/0x15c [ 72.624634][ T4717] dump_stack+0x1c/0x5c [ 72.625344][ T4717] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.626210][ T4717] dccp_xmit_packet+0x298/0x460 [ 72.627069][ T4717] dccp_write_xmit+0x118/0x1d0 [ 72.627904][ T4717] dccp_sendmsg+0x510/0x850 [ 72.628671][ T4717] inet_sendmsg+0x154/0x27c [ 72.629438][ T4717] __sys_sendto+0x30c/0x420 [ 72.630219][ T4717] __arm64_sys_sendto+0xe4/0x104 [ 72.631002][ T4717] invoke_syscall+0x98/0x28c [ 72.631761][ T4717] el0_svc_common+0x13c/0x258 [ 72.632540][ T4717] do_el0_svc+0x5c/0x140 [ 72.633261][ T4717] el0_svc+0x78/0x1d0 [ 72.633949][ T4717] el0t_64_sync_handler+0xcc/0xe4 [ 72.634779][ T4717] el0t_64_sync+0x1a0/0x1a4 [ 72.635838][ T4717] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.637571][ T4717] CPU: 0 PID: 4717 Comm: syz.0.31 Not tainted syzkaller #0 [ 72.638693][ T4717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.640317][ T4717] Call trace: [ 72.640847][ T4717] dump_backtrace+0x0/0x458 [ 72.641593][ T4717] show_stack+0x2c/0x3c [ 72.642293][ T4717] __dump_stack+0x30/0x40 [ 72.643021][ T4717] dump_stack_lvl+0xf4/0x15c [ 72.643811][ T4717] dump_stack+0x1c/0x5c [ 72.644469][ T4717] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.645320][ T4717] dccp_xmit_packet+0x298/0x460 [ 72.646087][ T4717] dccp_write_xmit+0x118/0x1d0 [ 72.646795][ T4717] dccp_sendmsg+0x510/0x850 [ 72.647473][ T4717] inet_sendmsg+0x154/0x27c [ 72.648240][ T4717] __sys_sendto+0x30c/0x420 [ 72.649031][ T4717] __arm64_sys_sendto+0xe4/0x104 [ 72.649924][ T4717] invoke_syscall+0x98/0x28c [ 72.650734][ T4717] el0_svc_common+0x13c/0x258 [ 72.651504][ T4717] do_el0_svc+0x5c/0x140 [ 72.652223][ T4717] el0_svc+0x78/0x1d0 [ 72.652862][ T4717] el0t_64_sync_handler+0xcc/0xe4 [ 72.653642][ T4717] el0t_64_sync+0x1a0/0x1a4 [ 72.654589][ T4717] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.656253][ T4717] CPU: 0 PID: 4717 Comm: syz.0.31 Not tainted syzkaller #0 [ 72.657387][ T4717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.659071][ T4717] Call trace: [ 72.659618][ T4717] dump_backtrace+0x0/0x458 [ 72.660418][ T4717] show_stack+0x2c/0x3c [ 72.661077][ T4717] __dump_stack+0x30/0x40 [ 72.661844][ T4717] dump_stack_lvl+0xf4/0x15c [ 72.662671][ T4717] dump_stack+0x1c/0x5c [ 72.663367][ T4717] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.664288][ T4717] dccp_xmit_packet+0x298/0x460 [ 72.665148][ T4717] dccp_write_xmit+0x118/0x1d0 [ 72.666012][ T4717] dccp_sendmsg+0x510/0x850 [ 72.666844][ T4717] inet_sendmsg+0x154/0x27c [ 72.667585][ T4717] __sys_sendto+0x30c/0x420 [ 72.668361][ T4717] __arm64_sys_sendto+0xe4/0x104 [ 72.669252][ T4717] invoke_syscall+0x98/0x28c [ 72.669969][ T4717] el0_svc_common+0x13c/0x258 [ 72.670714][ T4717] do_el0_svc+0x5c/0x140 [ 72.671403][ T4717] el0_svc+0x78/0x1d0 [ 72.672061][ T4717] el0t_64_sync_handler+0xcc/0xe4 [ 72.672824][ T4717] el0t_64_sync+0x1a0/0x1a4 [ 72.702484][ T4722] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.704378][ T4722] CPU: 0 PID: 4722 Comm: syz.0.33 Not tainted syzkaller #0 [ 72.705489][ T4722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.707002][ T4722] Call trace: [ 72.707512][ T4722] dump_backtrace+0x0/0x458 [ 72.708271][ T4722] show_stack+0x2c/0x3c [ 72.709004][ T4722] __dump_stack+0x30/0x40 [ 72.709765][ T4722] dump_stack_lvl+0xf4/0x15c [ 72.710648][ T4722] dump_stack+0x1c/0x5c [ 72.711382][ T4722] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.712293][ T4722] dccp_xmit_packet+0x298/0x460 [ 72.713128][ T4722] dccp_write_xmit+0x118/0x1d0 [ 72.713986][ T4722] dccp_sendmsg+0x510/0x850 [ 72.714735][ T4722] inet_sendmsg+0x154/0x27c [ 72.715510][ T4722] __sys_sendto+0x30c/0x420 [ 72.716242][ T4722] __arm64_sys_sendto+0xe4/0x104 [ 72.717116][ T4722] invoke_syscall+0x98/0x28c [ 72.717882][ T4722] el0_svc_common+0x13c/0x258 [ 72.718663][ T4722] do_el0_svc+0x5c/0x140 [ 72.719390][ T4722] el0_svc+0x78/0x1d0 [ 72.720124][ T4722] el0t_64_sync_handler+0xcc/0xe4 [ 72.720964][ T4722] el0t_64_sync+0x1a0/0x1a4 [ 72.722555][ T4722] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.724187][ T4722] CPU: 0 PID: 4722 Comm: syz.0.33 Not tainted syzkaller #0 [ 72.725437][ T4722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.727047][ T4722] Call trace: [ 72.727581][ T4722] dump_backtrace+0x0/0x458 [ 72.728383][ T4722] show_stack+0x2c/0x3c [ 72.729043][ T4722] __dump_stack+0x30/0x40 [ 72.729768][ T4722] dump_stack_lvl+0xf4/0x15c [ 72.730512][ T4722] dump_stack+0x1c/0x5c [ 72.731216][ T4722] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.732133][ T4722] dccp_xmit_packet+0x298/0x460 [ 72.732966][ T4722] dccp_write_xmit+0x118/0x1d0 [ 72.733893][ T4722] dccp_sendmsg+0x510/0x850 [ 72.734687][ T4722] inet_sendmsg+0x154/0x27c [ 72.735565][ T4722] __sys_sendto+0x30c/0x420 [ 72.736406][ T4722] __arm64_sys_sendto+0xe4/0x104 [ 72.737384][ T4722] invoke_syscall+0x98/0x28c [ 72.738212][ T4722] el0_svc_common+0x13c/0x258 [ 72.739035][ T4722] do_el0_svc+0x5c/0x140 [ 72.739727][ T4722] el0_svc+0x78/0x1d0 [ 72.740376][ T4722] el0t_64_sync_handler+0xcc/0xe4 [ 72.741209][ T4722] el0t_64_sync+0x1a0/0x1a4 [ 72.742394][ T4722] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.744085][ T4722] CPU: 0 PID: 4722 Comm: syz.0.33 Not tainted syzkaller #0 [ 72.745394][ T4722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.747124][ T4722] Call trace: [ 72.747746][ T4722] dump_backtrace+0x0/0x458 [ 72.748599][ T4722] show_stack+0x2c/0x3c [ 72.749364][ T4722] __dump_stack+0x30/0x40 [ 72.750267][ T4722] dump_stack_lvl+0xf4/0x15c [ 72.751026][ T4722] dump_stack+0x1c/0x5c [ 72.751713][ T4722] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.752630][ T4722] dccp_xmit_packet+0x298/0x460 [ 72.753482][ T4722] dccp_write_xmit+0x118/0x1d0 [ 72.754333][ T4722] dccp_sendmsg+0x510/0x850 [ 72.755087][ T4722] inet_sendmsg+0x154/0x27c [ 72.755905][ T4722] __sys_sendto+0x30c/0x420 [ 72.756814][ T4722] __arm64_sys_sendto+0xe4/0x104 [ 72.757763][ T4722] invoke_syscall+0x98/0x28c [ 72.758605][ T4722] el0_svc_common+0x13c/0x258 [ 72.759425][ T4722] do_el0_svc+0x5c/0x140 [ 72.760166][ T4722] el0_svc+0x78/0x1d0 [ 72.760952][ T4722] el0t_64_sync_handler+0xcc/0xe4 [ 72.761895][ T4722] el0t_64_sync+0x1a0/0x1a4 [ 72.763434][ T4722] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.765358][ T4722] CPU: 0 PID: 4722 Comm: syz.0.33 Not tainted syzkaller #0 [ 72.766648][ T4722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.768394][ T4722] Call trace: [ 72.768941][ T4722] dump_backtrace+0x0/0x458 [ 72.769716][ T4722] show_stack+0x2c/0x3c [ 72.770380][ T4722] __dump_stack+0x30/0x40 [ 72.771152][ T4722] dump_stack_lvl+0xf4/0x15c [ 72.771937][ T4722] dump_stack+0x1c/0x5c [ 72.772704][ T4722] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.773643][ T4722] dccp_xmit_packet+0x298/0x460 [ 72.774476][ T4722] dccp_write_xmit+0x118/0x1d0 [ 72.775272][ T4722] dccp_sendmsg+0x510/0x850 [ 72.776026][ T4722] inet_sendmsg+0x154/0x27c [ 72.776753][ T4722] __sys_sendto+0x30c/0x420 [ 72.777473][ T4722] __arm64_sys_sendto+0xe4/0x104 [ 72.778252][ T4722] invoke_syscall+0x98/0x28c [ 72.779017][ T4722] el0_svc_common+0x13c/0x258 [ 72.779793][ T4722] do_el0_svc+0x5c/0x140 [ 72.780525][ T4722] el0_svc+0x78/0x1d0 [ 72.781227][ T4722] el0t_64_sync_handler+0xcc/0xe4 [ 72.782101][ T4722] el0t_64_sync+0x1a0/0x1a4 [ 72.783084][ T4722] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.784799][ T4722] CPU: 0 PID: 4722 Comm: syz.0.33 Not tainted syzkaller #0 [ 72.785955][ T4722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.787582][ T4722] Call trace: [ 72.788084][ T4722] dump_backtrace+0x0/0x458 [ 72.788813][ T4722] show_stack+0x2c/0x3c [ 72.789554][ T4722] __dump_stack+0x30/0x40 [ 72.790307][ T4722] dump_stack_lvl+0xf4/0x15c [ 72.791094][ T4722] dump_stack+0x1c/0x5c [ 72.791779][ T4722] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.792699][ T4722] dccp_xmit_packet+0x298/0x460 [ 72.793577][ T4722] dccp_write_xmit+0x118/0x1d0 [ 72.794353][ T4722] dccp_sendmsg+0x510/0x850 [ 72.795158][ T4722] inet_sendmsg+0x154/0x27c [ 72.795908][ T4722] __sys_sendto+0x30c/0x420 [ 72.796736][ T4722] __arm64_sys_sendto+0xe4/0x104 [ 72.797576][ T4722] invoke_syscall+0x98/0x28c [ 72.798371][ T4722] el0_svc_common+0x13c/0x258 [ 72.799186][ T4722] do_el0_svc+0x5c/0x140 [ 72.799921][ T4722] el0_svc+0x78/0x1d0 [ 72.800663][ T4722] el0t_64_sync_handler+0xcc/0xe4 [ 72.801496][ T4722] el0t_64_sync+0x1a0/0x1a4 [ 72.803364][ T4722] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.805242][ T4722] CPU: 1 PID: 4722 Comm: syz.0.33 Not tainted syzkaller #0 [ 72.806372][ T4722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.808016][ T4722] Call trace: [ 72.808592][ T4722] dump_backtrace+0x0/0x458 [ 72.809302][ T4722] show_stack+0x2c/0x3c [ 72.809942][ T4722] __dump_stack+0x30/0x40 [ 72.810630][ T4722] dump_stack_lvl+0xf4/0x15c [ 72.811346][ T4722] dump_stack+0x1c/0x5c [ 72.812036][ T4722] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.813030][ T4722] dccp_xmit_packet+0x298/0x460 [ 72.813803][ T4722] dccp_write_xmit+0x118/0x1d0 [ 72.814593][ T4722] dccp_sendmsg+0x510/0x850 [ 72.815330][ T4722] inet_sendmsg+0x154/0x27c [ 72.816045][ T4722] __sys_sendto+0x30c/0x420 [ 72.816786][ T4722] __arm64_sys_sendto+0xe4/0x104 [ 72.817633][ T4722] invoke_syscall+0x98/0x28c [ 72.818419][ T4722] el0_svc_common+0x13c/0x258 [ 72.819169][ T4722] do_el0_svc+0x5c/0x140 [ 72.819871][ T4722] el0_svc+0x78/0x1d0 [ 72.820580][ T4722] el0t_64_sync_handler+0xcc/0xe4 [ 72.821375][ T4722] el0t_64_sync+0x1a0/0x1a4 [ 72.823748][ T4722] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.825884][ T4722] CPU: 0 PID: 4722 Comm: syz.0.33 Not tainted syzkaller #0 [ 72.827020][ T4722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.828773][ T4722] Call trace: [ 72.829356][ T4722] dump_backtrace+0x0/0x458 [ 72.830138][ T4722] show_stack+0x2c/0x3c [ 72.830890][ T4722] __dump_stack+0x30/0x40 [ 72.831683][ T4722] dump_stack_lvl+0xf4/0x15c [ 72.832567][ T4722] dump_stack+0x1c/0x5c [ 72.833357][ T4722] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.834354][ T4722] dccp_xmit_packet+0x298/0x460 [ 72.835327][ T4722] dccp_write_xmit+0x118/0x1d0 [ 72.836265][ T4722] dccp_sendmsg+0x510/0x850 [ 72.837096][ T4722] inet_sendmsg+0x154/0x27c [ 72.837820][ T4722] __sys_sendto+0x30c/0x420 [ 72.838584][ T4722] __arm64_sys_sendto+0xe4/0x104 [ 72.839451][ T4722] invoke_syscall+0x98/0x28c [ 72.840238][ T4722] el0_svc_common+0x13c/0x258 [ 72.841162][ T4722] do_el0_svc+0x5c/0x140 [ 72.841948][ T4722] el0_svc+0x78/0x1d0 [ 72.842685][ T4722] el0t_64_sync_handler+0xcc/0xe4 [ 72.843591][ T4722] el0t_64_sync+0x1a0/0x1a4 [ 72.844794][ T4722] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.846545][ T4722] CPU: 0 PID: 4722 Comm: syz.0.33 Not tainted syzkaller #0 [ 72.847630][ T4722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.849371][ T4722] Call trace: [ 72.849935][ T4722] dump_backtrace+0x0/0x458 [ 72.850730][ T4722] show_stack+0x2c/0x3c [ 72.851531][ T4722] __dump_stack+0x30/0x40 [ 72.852327][ T4722] dump_stack_lvl+0xf4/0x15c [ 72.853229][ T4722] dump_stack+0x1c/0x5c [ 72.853917][ T4722] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.854831][ T4722] dccp_xmit_packet+0x298/0x460 [ 72.855693][ T4722] dccp_write_xmit+0x118/0x1d0 [ 72.856498][ T4722] dccp_sendmsg+0x510/0x850 [ 72.857373][ T4722] inet_sendmsg+0x154/0x27c [ 72.858178][ T4722] __sys_sendto+0x30c/0x420 [ 72.858985][ T4722] __arm64_sys_sendto+0xe4/0x104 [ 72.859811][ T4722] invoke_syscall+0x98/0x28c [ 72.860556][ T4722] el0_svc_common+0x13c/0x258 [ 72.861337][ T4722] do_el0_svc+0x5c/0x140 [ 72.862075][ T4722] el0_svc+0x78/0x1d0 [ 72.862754][ T4722] el0t_64_sync_handler+0xcc/0xe4 [ 72.863562][ T4722] el0t_64_sync+0x1a0/0x1a4 [ 72.864734][ T4722] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.866776][ T4722] CPU: 0 PID: 4722 Comm: syz.0.33 Not tainted syzkaller #0 [ 72.867936][ T4722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.869594][ T4722] Call trace: [ 72.870160][ T4722] dump_backtrace+0x0/0x458 [ 72.870947][ T4722] show_stack+0x2c/0x3c [ 72.871668][ T4722] __dump_stack+0x30/0x40 [ 72.872357][ T4722] dump_stack_lvl+0xf4/0x15c [ 72.873106][ T4722] dump_stack+0x1c/0x5c [ 72.873807][ T4722] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.874851][ T4722] dccp_xmit_packet+0x298/0x460 [ 72.875786][ T4722] dccp_write_xmit+0x118/0x1d0 [ 72.876701][ T4722] dccp_sendmsg+0x510/0x850 [ 72.877558][ T4722] inet_sendmsg+0x154/0x27c [ 72.878401][ T4722] __sys_sendto+0x30c/0x420 [ 72.879306][ T4722] __arm64_sys_sendto+0xe4/0x104 [ 72.880225][ T4722] invoke_syscall+0x98/0x28c [ 72.880977][ T4722] el0_svc_common+0x13c/0x258 [ 72.881761][ T4722] do_el0_svc+0x5c/0x140 [ 72.882458][ T4722] el0_svc+0x78/0x1d0 [ 72.883168][ T4722] el0t_64_sync_handler+0xcc/0xe4 [ 72.884001][ T4722] el0t_64_sync+0x1a0/0x1a4 [ 72.885095][ T4722] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.886984][ T4722] CPU: 0 PID: 4722 Comm: syz.0.33 Not tainted syzkaller #0 [ 72.888299][ T4722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.890211][ T4722] Call trace: [ 72.890765][ T4722] dump_backtrace+0x0/0x458 [ 72.891652][ T4722] show_stack+0x2c/0x3c [ 72.892380][ T4722] __dump_stack+0x30/0x40 [ 72.893115][ T4722] dump_stack_lvl+0xf4/0x15c [ 72.893899][ T4722] dump_stack+0x1c/0x5c [ 72.894731][ T4722] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.895746][ T4722] dccp_xmit_packet+0x298/0x460 [ 72.896680][ T4722] dccp_write_xmit+0x118/0x1d0 [ 72.897541][ T4722] dccp_sendmsg+0x510/0x850 [ 72.898370][ T4722] inet_sendmsg+0x154/0x27c [ 72.899244][ T4722] __sys_sendto+0x30c/0x420 [ 72.899994][ T4722] __arm64_sys_sendto+0xe4/0x104 [ 72.900933][ T4722] invoke_syscall+0x98/0x28c [ 72.901819][ T4722] el0_svc_common+0x13c/0x258 [ 72.902609][ T4722] do_el0_svc+0x5c/0x140 [ 72.903270][ T4722] el0_svc+0x78/0x1d0 [ 72.903975][ T4722] el0t_64_sync_handler+0xcc/0xe4 [ 72.904830][ T4722] el0t_64_sync+0x1a0/0x1a4 [ 72.906016][ T4722] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.907744][ T4722] CPU: 0 PID: 4722 Comm: syz.0.33 Not tainted syzkaller #0 [ 72.908933][ T4722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.910922][ T4722] Call trace: [ 72.911527][ T4722] dump_backtrace+0x0/0x458 [ 72.912389][ T4722] show_stack+0x2c/0x3c [ 72.913145][ T4722] __dump_stack+0x30/0x40 [ 72.913891][ T4722] dump_stack_lvl+0xf4/0x15c [ 72.914729][ T4722] dump_stack+0x1c/0x5c [ 72.915557][ T4722] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.916551][ T4722] dccp_xmit_packet+0x298/0x460 [ 72.917367][ T4722] dccp_write_xmit+0x118/0x1d0 [ 72.918148][ T4722] dccp_sendmsg+0x510/0x850 [ 72.918875][ T4722] inet_sendmsg+0x154/0x27c [ 72.919593][ T4722] __sys_sendto+0x30c/0x420 [ 72.920285][ T4722] __arm64_sys_sendto+0xe4/0x104 [ 72.921089][ T4722] invoke_syscall+0x98/0x28c [ 72.921812][ T4722] el0_svc_common+0x13c/0x258 [ 72.922517][ T4722] do_el0_svc+0x5c/0x140 [ 72.923179][ T4722] el0_svc+0x78/0x1d0 [ 72.923897][ T4722] el0t_64_sync_handler+0xcc/0xe4 [ 72.924819][ T4722] el0t_64_sync+0x1a0/0x1a4 [ 72.927682][ T4722] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.929601][ T4722] CPU: 0 PID: 4722 Comm: syz.0.33 Not tainted syzkaller #0 [ 72.930738][ T4722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.932316][ T4722] Call trace: [ 72.932838][ T4722] dump_backtrace+0x0/0x458 [ 72.933595][ T4722] show_stack+0x2c/0x3c [ 72.934247][ T4722] __dump_stack+0x30/0x40 [ 72.934910][ T4722] dump_stack_lvl+0xf4/0x15c [ 72.935656][ T4722] dump_stack+0x1c/0x5c [ 72.936359][ T4722] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.937243][ T4722] dccp_xmit_packet+0x298/0x460 [ 72.938062][ T4722] dccp_write_xmit+0x118/0x1d0 [ 72.938939][ T4722] dccp_sendmsg+0x510/0x850 [ 72.939727][ T4722] inet_sendmsg+0x154/0x27c [ 72.940488][ T4722] __sys_sendto+0x30c/0x420 [ 72.941320][ T4722] __arm64_sys_sendto+0xe4/0x104 [ 72.942188][ T4722] invoke_syscall+0x98/0x28c [ 72.943029][ T4722] el0_svc_common+0x13c/0x258 [ 72.943877][ T4722] do_el0_svc+0x5c/0x140 [ 72.944669][ T4722] el0_svc+0x78/0x1d0 [ 72.945355][ T4722] el0t_64_sync_handler+0xcc/0xe4 [ 72.946241][ T4722] el0t_64_sync+0x1a0/0x1a4 [ 72.947853][ T4722] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.949941][ T4722] CPU: 1 PID: 4722 Comm: syz.0.33 Not tainted syzkaller #0 [ 72.951232][ T4722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.952848][ T4722] Call trace: [ 72.953345][ T4722] dump_backtrace+0x0/0x458 [ 72.954064][ T4722] show_stack+0x2c/0x3c [ 72.954707][ T4722] __dump_stack+0x30/0x40 [ 72.955396][ T4722] dump_stack_lvl+0xf4/0x15c [ 72.956103][ T4722] dump_stack+0x1c/0x5c [ 72.956754][ T4722] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.957633][ T4722] dccp_xmit_packet+0x298/0x460 [ 72.958392][ T4722] dccp_write_xmit+0x118/0x1d0 [ 72.959096][ T4722] dccp_sendmsg+0x510/0x850 [ 72.959813][ T4722] inet_sendmsg+0x154/0x27c [ 72.960568][ T4722] __sys_sendto+0x30c/0x420 [ 72.961276][ T4722] __arm64_sys_sendto+0xe4/0x104 [ 72.962022][ T4722] invoke_syscall+0x98/0x28c [ 72.962745][ T4722] el0_svc_common+0x13c/0x258 [ 72.963473][ T4722] do_el0_svc+0x5c/0x140 [ 72.964156][ T4722] el0_svc+0x78/0x1d0 [ 72.964836][ T4722] el0t_64_sync_handler+0xcc/0xe4 [ 72.965637][ T4722] el0t_64_sync+0x1a0/0x1a4 [ 72.966621][ T4722] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 72.968321][ T4722] CPU: 1 PID: 4722 Comm: syz.0.33 Not tainted syzkaller #0 [ 72.969388][ T4722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.970818][ T4722] Call trace: [ 72.971318][ T4722] dump_backtrace+0x0/0x458 [ 72.971979][ T4722] show_stack+0x2c/0x3c [ 72.972586][ T4722] __dump_stack+0x30/0x40 [ 72.973228][ T4722] dump_stack_lvl+0xf4/0x15c [ 72.973874][ T4722] dump_stack+0x1c/0x5c [ 72.974454][ T4722] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 72.975268][ T4722] dccp_xmit_packet+0x298/0x460 [ 72.975948][ T4722] dccp_write_xmit+0x118/0x1d0 [ 72.976618][ T4722] dccp_sendmsg+0x510/0x850 [ 72.977298][ T4722] inet_sendmsg+0x154/0x27c [ 72.977918][ T4722] __sys_sendto+0x30c/0x420 [ 72.978720][ T4722] __arm64_sys_sendto+0xe4/0x104 [ 72.979503][ T4722] invoke_syscall+0x98/0x28c [ 72.980228][ T4722] el0_svc_common+0x13c/0x258 [ 72.980989][ T4722] do_el0_svc+0x5c/0x140 [ 72.981716][ T4722] el0_svc+0x78/0x1d0 [ 72.982314][ T4722] el0t_64_sync_handler+0xcc/0xe4 [ 72.983069][ T4722] el0t_64_sync+0x1a0/0x1a4 [ 73.002759][ T4725] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.004582][ T4725] CPU: 1 PID: 4725 Comm: syz.0.34 Not tainted syzkaller #0 [ 73.005651][ T4725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.007080][ T4725] Call trace: [ 73.007561][ T4725] dump_backtrace+0x0/0x458 [ 73.008199][ T4725] show_stack+0x2c/0x3c [ 73.008933][ T4725] __dump_stack+0x30/0x40 [ 73.009642][ T4725] dump_stack_lvl+0xf4/0x15c [ 73.010369][ T4725] dump_stack+0x1c/0x5c [ 73.011044][ T4725] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.011921][ T4725] dccp_xmit_packet+0x298/0x460 [ 73.012725][ T4725] dccp_write_xmit+0x118/0x1d0 [ 73.013481][ T4725] dccp_sendmsg+0x510/0x850 [ 73.014211][ T4725] inet_sendmsg+0x154/0x27c [ 73.014928][ T4725] __sys_sendto+0x30c/0x420 [ 73.015666][ T4725] __arm64_sys_sendto+0xe4/0x104 [ 73.016467][ T4725] invoke_syscall+0x98/0x28c [ 73.017198][ T4725] el0_svc_common+0x13c/0x258 [ 73.017944][ T4725] do_el0_svc+0x5c/0x140 [ 73.018576][ T4725] el0_svc+0x78/0x1d0 [ 73.019250][ T4725] el0t_64_sync_handler+0xcc/0xe4 [ 73.020023][ T4725] el0t_64_sync+0x1a0/0x1a4 [ 73.021311][ T4725] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.023095][ T4725] CPU: 1 PID: 4725 Comm: syz.0.34 Not tainted syzkaller #0 [ 73.024378][ T4725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.025984][ T4725] Call trace: [ 73.026430][ T4725] dump_backtrace+0x0/0x458 [ 73.027099][ T4725] show_stack+0x2c/0x3c [ 73.027709][ T4725] __dump_stack+0x30/0x40 [ 73.028348][ T4725] dump_stack_lvl+0xf4/0x15c [ 73.029282][ T4725] dump_stack+0x1c/0x5c [ 73.030123][ T4725] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.030979][ T4725] dccp_xmit_packet+0x298/0x460 [ 73.031782][ T4725] dccp_write_xmit+0x118/0x1d0 [ 73.032564][ T4725] dccp_sendmsg+0x510/0x850 [ 73.033323][ T4725] inet_sendmsg+0x154/0x27c [ 73.034133][ T4725] __sys_sendto+0x30c/0x420 [ 73.034928][ T4725] __arm64_sys_sendto+0xe4/0x104 [ 73.035757][ T4725] invoke_syscall+0x98/0x28c [ 73.036646][ T4725] el0_svc_common+0x13c/0x258 [ 73.037432][ T4725] do_el0_svc+0x5c/0x140 [ 73.038158][ T4725] el0_svc+0x78/0x1d0 [ 73.038795][ T4725] el0t_64_sync_handler+0xcc/0xe4 [ 73.039692][ T4725] el0t_64_sync+0x1a0/0x1a4 [ 73.040797][ T4725] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.042493][ T4725] CPU: 1 PID: 4725 Comm: syz.0.34 Not tainted syzkaller #0 [ 73.043550][ T4725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.045168][ T4725] Call trace: [ 73.045713][ T4725] dump_backtrace+0x0/0x458 [ 73.046403][ T4725] show_stack+0x2c/0x3c [ 73.047054][ T4725] __dump_stack+0x30/0x40 [ 73.047861][ T4725] dump_stack_lvl+0xf4/0x15c [ 73.048705][ T4725] dump_stack+0x1c/0x5c [ 73.049459][ T4725] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.050394][ T4725] dccp_xmit_packet+0x298/0x460 [ 73.051204][ T4725] dccp_write_xmit+0x118/0x1d0 [ 73.052058][ T4725] dccp_sendmsg+0x510/0x850 [ 73.052834][ T4725] inet_sendmsg+0x154/0x27c [ 73.053628][ T4725] __sys_sendto+0x30c/0x420 [ 73.054313][ T4725] __arm64_sys_sendto+0xe4/0x104 [ 73.055056][ T4725] invoke_syscall+0x98/0x28c [ 73.055728][ T4725] el0_svc_common+0x13c/0x258 [ 73.056478][ T4725] do_el0_svc+0x5c/0x140 [ 73.057198][ T4725] el0_svc+0x78/0x1d0 [ 73.057799][ T4725] el0t_64_sync_handler+0xcc/0xe4 [ 73.058742][ T4725] el0t_64_sync+0x1a0/0x1a4 [ 73.060546][ T4725] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.062348][ T4725] CPU: 1 PID: 4725 Comm: syz.0.34 Not tainted syzkaller #0 [ 73.063432][ T4725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.064979][ T4725] Call trace: [ 73.065453][ T4725] dump_backtrace+0x0/0x458 [ 73.066183][ T4725] show_stack+0x2c/0x3c [ 73.066826][ T4725] __dump_stack+0x30/0x40 [ 73.067495][ T4725] dump_stack_lvl+0xf4/0x15c [ 73.068182][ T4725] dump_stack+0x1c/0x5c [ 73.068858][ T4725] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.069766][ T4725] dccp_xmit_packet+0x298/0x460 [ 73.070570][ T4725] dccp_write_xmit+0x118/0x1d0 [ 73.071269][ T4725] dccp_sendmsg+0x510/0x850 [ 73.071969][ T4725] inet_sendmsg+0x154/0x27c [ 73.072797][ T4725] __sys_sendto+0x30c/0x420 [ 73.073558][ T4725] __arm64_sys_sendto+0xe4/0x104 [ 73.074428][ T4725] invoke_syscall+0x98/0x28c [ 73.075180][ T4725] el0_svc_common+0x13c/0x258 [ 73.076048][ T4725] do_el0_svc+0x5c/0x140 [ 73.076758][ T4725] el0_svc+0x78/0x1d0 [ 73.077397][ T4725] el0t_64_sync_handler+0xcc/0xe4 [ 73.078259][ T4725] el0t_64_sync+0x1a0/0x1a4 [ 73.079210][ T4725] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.081071][ T4725] CPU: 1 PID: 4725 Comm: syz.0.34 Not tainted syzkaller #0 [ 73.082339][ T4725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.084047][ T4725] Call trace: [ 73.084606][ T4725] dump_backtrace+0x0/0x458 [ 73.085309][ T4725] show_stack+0x2c/0x3c [ 73.085926][ T4725] __dump_stack+0x30/0x40 [ 73.086590][ T4725] dump_stack_lvl+0xf4/0x15c [ 73.087321][ T4725] dump_stack+0x1c/0x5c [ 73.087892][ T4725] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.088738][ T4725] dccp_xmit_packet+0x298/0x460 [ 73.089552][ T4725] dccp_write_xmit+0x118/0x1d0 [ 73.090368][ T4725] dccp_sendmsg+0x510/0x850 [ 73.091107][ T4725] inet_sendmsg+0x154/0x27c [ 73.091854][ T4725] __sys_sendto+0x30c/0x420 [ 73.092622][ T4725] __arm64_sys_sendto+0xe4/0x104 [ 73.093407][ T4725] invoke_syscall+0x98/0x28c [ 73.094136][ T4725] el0_svc_common+0x13c/0x258 [ 73.094896][ T4725] do_el0_svc+0x5c/0x140 [ 73.095561][ T4725] el0_svc+0x78/0x1d0 [ 73.096202][ T4725] el0t_64_sync_handler+0xcc/0xe4 [ 73.097026][ T4725] el0t_64_sync+0x1a0/0x1a4 [ 73.097941][ T4725] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.099768][ T4725] CPU: 1 PID: 4725 Comm: syz.0.34 Not tainted syzkaller #0 [ 73.100917][ T4725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.102481][ T4725] Call trace: [ 73.102981][ T4725] dump_backtrace+0x0/0x458 [ 73.103658][ T4725] show_stack+0x2c/0x3c [ 73.104257][ T4725] __dump_stack+0x30/0x40 [ 73.104897][ T4725] dump_stack_lvl+0xf4/0x15c [ 73.105559][ T4725] dump_stack+0x1c/0x5c [ 73.106181][ T4725] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.107082][ T4725] dccp_xmit_packet+0x298/0x460 [ 73.107845][ T4725] dccp_write_xmit+0x118/0x1d0 [ 73.108656][ T4725] dccp_sendmsg+0x510/0x850 [ 73.109580][ T4725] inet_sendmsg+0x154/0x27c [ 73.110375][ T4725] __sys_sendto+0x30c/0x420 [ 73.111189][ T4725] __arm64_sys_sendto+0xe4/0x104 [ 73.112131][ T4725] invoke_syscall+0x98/0x28c [ 73.112930][ T4725] el0_svc_common+0x13c/0x258 [ 73.113739][ T4725] do_el0_svc+0x5c/0x140 [ 73.114514][ T4725] el0_svc+0x78/0x1d0 [ 73.115306][ T4725] el0t_64_sync_handler+0xcc/0xe4 [ 73.116220][ T4725] el0t_64_sync+0x1a0/0x1a4 [ 73.117233][ T4725] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.119383][ T4725] CPU: 1 PID: 4725 Comm: syz.0.34 Not tainted syzkaller #0 [ 73.120527][ T4725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.122145][ T4725] Call trace: [ 73.122604][ T4725] dump_backtrace+0x0/0x458 [ 73.123390][ T4725] show_stack+0x2c/0x3c [ 73.124015][ T4725] __dump_stack+0x30/0x40 [ 73.124696][ T4725] dump_stack_lvl+0xf4/0x15c [ 73.125410][ T4725] dump_stack+0x1c/0x5c [ 73.126064][ T4725] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.126880][ T4725] dccp_xmit_packet+0x298/0x460 [ 73.127653][ T4725] dccp_write_xmit+0x118/0x1d0 [ 73.128376][ T4725] dccp_sendmsg+0x510/0x850 [ 73.129239][ T4725] inet_sendmsg+0x154/0x27c [ 73.130095][ T4725] __sys_sendto+0x30c/0x420 [ 73.130898][ T4725] __arm64_sys_sendto+0xe4/0x104 [ 73.131743][ T4725] invoke_syscall+0x98/0x28c [ 73.132475][ T4725] el0_svc_common+0x13c/0x258 [ 73.133263][ T4725] do_el0_svc+0x5c/0x140 [ 73.133948][ T4725] el0_svc+0x78/0x1d0 [ 73.134612][ T4725] el0t_64_sync_handler+0xcc/0xe4 [ 73.135424][ T4725] el0t_64_sync+0x1a0/0x1a4 [ 73.136639][ T4725] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.138470][ T4725] CPU: 1 PID: 4725 Comm: syz.0.34 Not tainted syzkaller #0 [ 73.139679][ T4725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.141240][ T4725] Call trace: [ 73.141683][ T4725] dump_backtrace+0x0/0x458 [ 73.142332][ T4725] show_stack+0x2c/0x3c [ 73.142951][ T4725] __dump_stack+0x30/0x40 [ 73.143567][ T4725] dump_stack_lvl+0xf4/0x15c [ 73.144210][ T4725] dump_stack+0x1c/0x5c [ 73.144815][ T4725] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.145626][ T4725] dccp_xmit_packet+0x298/0x460 [ 73.146284][ T4725] dccp_write_xmit+0x118/0x1d0 [ 73.147007][ T4725] dccp_sendmsg+0x510/0x850 [ 73.147647][ T4725] inet_sendmsg+0x154/0x27c [ 73.148301][ T4725] __sys_sendto+0x30c/0x420 [ 73.148963][ T4725] __arm64_sys_sendto+0xe4/0x104 [ 73.149773][ T4725] invoke_syscall+0x98/0x28c [ 73.150462][ T4725] el0_svc_common+0x13c/0x258 [ 73.151216][ T4725] do_el0_svc+0x5c/0x140 [ 73.151852][ T4725] el0_svc+0x78/0x1d0 [ 73.152497][ T4725] el0t_64_sync_handler+0xcc/0xe4 [ 73.153371][ T4725] el0t_64_sync+0x1a0/0x1a4 [ 73.154808][ T4725] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.156571][ T4725] CPU: 1 PID: 4725 Comm: syz.0.34 Not tainted syzkaller #0 [ 73.157641][ T4725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.159224][ T4725] Call trace: [ 73.159775][ T4725] dump_backtrace+0x0/0x458 [ 73.160538][ T4725] show_stack+0x2c/0x3c [ 73.161227][ T4725] __dump_stack+0x30/0x40 [ 73.161961][ T4725] dump_stack_lvl+0xf4/0x15c [ 73.162704][ T4725] dump_stack+0x1c/0x5c [ 73.163404][ T4725] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.164339][ T4725] dccp_xmit_packet+0x298/0x460 [ 73.165190][ T4725] dccp_write_xmit+0x118/0x1d0 [ 73.166055][ T4725] dccp_sendmsg+0x510/0x850 [ 73.166900][ T4725] inet_sendmsg+0x154/0x27c [ 73.167590][ T4725] __sys_sendto+0x30c/0x420 [ 73.168335][ T4725] __arm64_sys_sendto+0xe4/0x104 [ 73.169242][ T4725] invoke_syscall+0x98/0x28c [ 73.170057][ T4725] el0_svc_common+0x13c/0x258 [ 73.170814][ T4725] do_el0_svc+0x5c/0x140 [ 73.171516][ T4725] el0_svc+0x78/0x1d0 [ 73.172339][ T4725] el0t_64_sync_handler+0xcc/0xe4 [ 73.173325][ T4725] el0t_64_sync+0x1a0/0x1a4 [ 73.174385][ T4725] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.176264][ T4725] CPU: 1 PID: 4725 Comm: syz.0.34 Not tainted syzkaller #0 [ 73.177357][ T4725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.179076][ T4725] Call trace: [ 73.179736][ T4725] dump_backtrace+0x0/0x458 [ 73.180615][ T4725] show_stack+0x2c/0x3c [ 73.181423][ T4725] __dump_stack+0x30/0x40 [ 73.182185][ T4725] dump_stack_lvl+0xf4/0x15c [ 73.182991][ T4725] dump_stack+0x1c/0x5c [ 73.183779][ T4725] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.184759][ T4725] dccp_xmit_packet+0x298/0x460 [ 73.185730][ T4725] dccp_write_xmit+0x118/0x1d0 [ 73.186711][ T4725] dccp_sendmsg+0x510/0x850 [ 73.187555][ T4725] inet_sendmsg+0x154/0x27c [ 73.188340][ T4725] __sys_sendto+0x30c/0x420 [ 73.189086][ T4725] __arm64_sys_sendto+0xe4/0x104 [ 73.190077][ T4725] invoke_syscall+0x98/0x28c [ 73.190885][ T4725] el0_svc_common+0x13c/0x258 [ 73.191662][ T4725] do_el0_svc+0x5c/0x140 [ 73.192491][ T4725] el0_svc+0x78/0x1d0 [ 73.193212][ T4725] el0t_64_sync_handler+0xcc/0xe4 [ 73.194122][ T4725] el0t_64_sync+0x1a0/0x1a4 [ 73.195093][ T4725] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.196791][ T4725] CPU: 1 PID: 4725 Comm: syz.0.34 Not tainted syzkaller #0 [ 73.197924][ T4725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.199691][ T4725] Call trace: [ 73.200233][ T4725] dump_backtrace+0x0/0x458 [ 73.200965][ T4725] show_stack+0x2c/0x3c [ 73.201680][ T4725] __dump_stack+0x30/0x40 [ 73.202411][ T4725] dump_stack_lvl+0xf4/0x15c [ 73.203187][ T4725] dump_stack+0x1c/0x5c [ 73.203944][ T4725] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.204912][ T4725] dccp_xmit_packet+0x298/0x460 [ 73.205713][ T4725] dccp_write_xmit+0x118/0x1d0 [ 73.206544][ T4725] dccp_sendmsg+0x510/0x850 [ 73.207331][ T4725] inet_sendmsg+0x154/0x27c [ 73.208041][ T4725] __sys_sendto+0x30c/0x420 [ 73.208796][ T4725] __arm64_sys_sendto+0xe4/0x104 [ 73.209625][ T4725] invoke_syscall+0x98/0x28c [ 73.210428][ T4725] el0_svc_common+0x13c/0x258 [ 73.211354][ T4725] do_el0_svc+0x5c/0x140 [ 73.212089][ T4725] el0_svc+0x78/0x1d0 [ 73.212885][ T4725] el0t_64_sync_handler+0xcc/0xe4 [ 73.213847][ T4725] el0t_64_sync+0x1a0/0x1a4 [ 73.214828][ T4725] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.216559][ T4725] CPU: 1 PID: 4725 Comm: syz.0.34 Not tainted syzkaller #0 [ 73.217631][ T4725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.219413][ T4725] Call trace: [ 73.220001][ T4725] dump_backtrace+0x0/0x458 [ 73.220724][ T4725] show_stack+0x2c/0x3c [ 73.221395][ T4725] __dump_stack+0x30/0x40 [ 73.222087][ T4725] dump_stack_lvl+0xf4/0x15c [ 73.222844][ T4725] dump_stack+0x1c/0x5c [ 73.223546][ T4725] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.224441][ T4725] dccp_xmit_packet+0x298/0x460 [ 73.225241][ T4725] dccp_write_xmit+0x118/0x1d0 [ 73.226073][ T4725] dccp_sendmsg+0x510/0x850 [ 73.226879][ T4725] inet_sendmsg+0x154/0x27c [ 73.227707][ T4725] __sys_sendto+0x30c/0x420 [ 73.228514][ T4725] __arm64_sys_sendto+0xe4/0x104 [ 73.229389][ T4725] invoke_syscall+0x98/0x28c [ 73.230183][ T4725] el0_svc_common+0x13c/0x258 [ 73.230943][ T4725] do_el0_svc+0x5c/0x140 [ 73.231680][ T4725] el0_svc+0x78/0x1d0 [ 73.232319][ T4725] el0t_64_sync_handler+0xcc/0xe4 [ 73.233185][ T4725] el0t_64_sync+0x1a0/0x1a4 [ 73.234237][ T4725] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.236025][ T4725] CPU: 1 PID: 4725 Comm: syz.0.34 Not tainted syzkaller #0 [ 73.237178][ T4725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.238928][ T4725] Call trace: [ 73.239506][ T4725] dump_backtrace+0x0/0x458 [ 73.240290][ T4725] show_stack+0x2c/0x3c [ 73.241037][ T4725] __dump_stack+0x30/0x40 [ 73.241818][ T4725] dump_stack_lvl+0xf4/0x15c [ 73.242593][ T4725] dump_stack+0x1c/0x5c [ 73.243388][ T4725] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.244288][ T4725] dccp_xmit_packet+0x298/0x460 [ 73.245123][ T4725] dccp_write_xmit+0x118/0x1d0 [ 73.245857][ T4725] dccp_sendmsg+0x510/0x850 [ 73.246562][ T4725] inet_sendmsg+0x154/0x27c [ 73.247292][ T4725] __sys_sendto+0x30c/0x420 [ 73.248011][ T4725] __arm64_sys_sendto+0xe4/0x104 [ 73.248887][ T4725] invoke_syscall+0x98/0x28c [ 73.249716][ T4725] el0_svc_common+0x13c/0x258 [ 73.250488][ T4725] do_el0_svc+0x5c/0x140 [ 73.251162][ T4725] el0_svc+0x78/0x1d0 [ 73.251794][ T4725] el0t_64_sync_handler+0xcc/0xe4 [ 73.252630][ T4725] el0t_64_sync+0x1a0/0x1a4 [ 73.253574][ T4725] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.255260][ T4725] CPU: 1 PID: 4725 Comm: syz.0.34 Not tainted syzkaller #0 [ 73.256447][ T4725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.258043][ T4725] Call trace: [ 73.258608][ T4725] dump_backtrace+0x0/0x458 [ 73.259304][ T4725] show_stack+0x2c/0x3c [ 73.259935][ T4725] __dump_stack+0x30/0x40 [ 73.260628][ T4725] dump_stack_lvl+0xf4/0x15c [ 73.261392][ T4725] dump_stack+0x1c/0x5c [ 73.262075][ T4725] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.262953][ T4725] dccp_xmit_packet+0x298/0x460 [ 73.263750][ T4725] dccp_write_xmit+0x118/0x1d0 [ 73.264514][ T4725] dccp_sendmsg+0x510/0x850 [ 73.265260][ T4725] inet_sendmsg+0x154/0x27c [ 73.265998][ T4725] __sys_sendto+0x30c/0x420 [ 73.266726][ T4725] __arm64_sys_sendto+0xe4/0x104 [ 73.267576][ T4725] invoke_syscall+0x98/0x28c [ 73.268251][ T4725] el0_svc_common+0x13c/0x258 [ 73.268972][ T4725] do_el0_svc+0x5c/0x140 [ 73.269692][ T4725] el0_svc+0x78/0x1d0 [ 73.270350][ T4725] el0t_64_sync_handler+0xcc/0xe4 [ 73.271177][ T4725] el0t_64_sync+0x1a0/0x1a4 [ 73.272024][ T4725] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.273885][ T4725] CPU: 1 PID: 4725 Comm: syz.0.34 Not tainted syzkaller #0 [ 73.275126][ T4725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.276839][ T4725] Call trace: [ 73.277302][ T4725] dump_backtrace+0x0/0x458 [ 73.277998][ T4725] show_stack+0x2c/0x3c [ 73.278857][ T4725] __dump_stack+0x30/0x40 [ 73.279600][ T4725] dump_stack_lvl+0xf4/0x15c [ 73.280337][ T4725] dump_stack+0x1c/0x5c [ 73.281069][ T4725] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.281966][ T4725] dccp_xmit_packet+0x298/0x460 [ 73.282789][ T4725] dccp_write_xmit+0x118/0x1d0 [ 73.283553][ T4725] dccp_sendmsg+0x510/0x850 [ 73.284348][ T4725] inet_sendmsg+0x154/0x27c [ 73.285139][ T4725] __sys_sendto+0x30c/0x420 [ 73.285966][ T4725] __arm64_sys_sendto+0xe4/0x104 [ 73.286762][ T4725] invoke_syscall+0x98/0x28c [ 73.287507][ T4725] el0_svc_common+0x13c/0x258 [ 73.288299][ T4725] do_el0_svc+0x5c/0x140 [ 73.289048][ T4725] el0_svc+0x78/0x1d0 [ 73.289763][ T4725] el0t_64_sync_handler+0xcc/0xe4 [ 73.290687][ T4725] el0t_64_sync+0x1a0/0x1a4 [ 73.311781][ T4727] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.313557][ T4727] CPU: 1 PID: 4727 Comm: syz.0.35 Not tainted syzkaller #0 [ 73.314623][ T4727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.316147][ T4727] Call trace: [ 73.316602][ T4727] dump_backtrace+0x0/0x458 [ 73.317261][ T4727] show_stack+0x2c/0x3c [ 73.317917][ T4727] __dump_stack+0x30/0x40 [ 73.318653][ T4727] dump_stack_lvl+0xf4/0x15c [ 73.319425][ T4727] dump_stack+0x1c/0x5c [ 73.320127][ T4727] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.320982][ T4727] dccp_xmit_packet+0x298/0x460 [ 73.321775][ T4727] dccp_write_xmit+0x118/0x1d0 [ 73.322702][ T4727] dccp_sendmsg+0x510/0x850 [ 73.323478][ T4727] inet_sendmsg+0x154/0x27c [ 73.324224][ T4727] __sys_sendto+0x30c/0x420 [ 73.325060][ T4727] __arm64_sys_sendto+0xe4/0x104 [ 73.325970][ T4727] invoke_syscall+0x98/0x28c [ 73.326772][ T4727] el0_svc_common+0x13c/0x258 [ 73.327521][ T4727] do_el0_svc+0x5c/0x140 [ 73.328186][ T4727] el0_svc+0x78/0x1d0 [ 73.328951][ T4727] el0t_64_sync_handler+0xcc/0xe4 [ 73.329962][ T4727] el0t_64_sync+0x1a0/0x1a4 [ 73.331508][ T4727] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.333300][ T4727] CPU: 1 PID: 4727 Comm: syz.0.35 Not tainted syzkaller #0 [ 73.334441][ T4727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.336036][ T4727] Call trace: [ 73.336515][ T4727] dump_backtrace+0x0/0x458 [ 73.337260][ T4727] show_stack+0x2c/0x3c [ 73.337888][ T4727] __dump_stack+0x30/0x40 [ 73.338636][ T4727] dump_stack_lvl+0xf4/0x15c [ 73.339370][ T4727] dump_stack+0x1c/0x5c [ 73.340064][ T4727] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.340936][ T4727] dccp_xmit_packet+0x298/0x460 [ 73.341695][ T4727] dccp_write_xmit+0x118/0x1d0 [ 73.342463][ T4727] dccp_sendmsg+0x510/0x850 [ 73.343215][ T4727] inet_sendmsg+0x154/0x27c [ 73.343894][ T4727] __sys_sendto+0x30c/0x420 [ 73.344583][ T4727] __arm64_sys_sendto+0xe4/0x104 [ 73.345354][ T4727] invoke_syscall+0x98/0x28c [ 73.346126][ T4727] el0_svc_common+0x13c/0x258 [ 73.346893][ T4727] do_el0_svc+0x5c/0x140 [ 73.347576][ T4727] el0_svc+0x78/0x1d0 [ 73.348200][ T4727] el0t_64_sync_handler+0xcc/0xe4 [ 73.348973][ T4727] el0t_64_sync+0x1a0/0x1a4 [ 73.350936][ T4727] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.352882][ T4727] CPU: 1 PID: 4727 Comm: syz.0.35 Not tainted syzkaller #0 [ 73.354021][ T4727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.355633][ T4727] Call trace: [ 73.356124][ T4727] dump_backtrace+0x0/0x458 [ 73.356871][ T4727] show_stack+0x2c/0x3c [ 73.357501][ T4727] __dump_stack+0x30/0x40 [ 73.358178][ T4727] dump_stack_lvl+0xf4/0x15c [ 73.358946][ T4727] dump_stack+0x1c/0x5c [ 73.359638][ T4727] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.360631][ T4727] dccp_xmit_packet+0x298/0x460 [ 73.361526][ T4727] dccp_write_xmit+0x118/0x1d0 [ 73.362278][ T4727] dccp_sendmsg+0x510/0x850 [ 73.363003][ T4727] inet_sendmsg+0x154/0x27c [ 73.363718][ T4727] __sys_sendto+0x30c/0x420 [ 73.364426][ T4727] __arm64_sys_sendto+0xe4/0x104 [ 73.365259][ T4727] invoke_syscall+0x98/0x28c [ 73.365995][ T4727] el0_svc_common+0x13c/0x258 [ 73.366826][ T4727] do_el0_svc+0x5c/0x140 [ 73.367528][ T4727] el0_svc+0x78/0x1d0 [ 73.368139][ T4727] el0t_64_sync_handler+0xcc/0xe4 [ 73.368994][ T4727] el0t_64_sync+0x1a0/0x1a4 [ 73.370708][ T4727] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.372531][ T4727] CPU: 1 PID: 4727 Comm: syz.0.35 Not tainted syzkaller #0 [ 73.373826][ T4727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.375533][ T4727] Call trace: [ 73.376007][ T4727] dump_backtrace+0x0/0x458 [ 73.376749][ T4727] show_stack+0x2c/0x3c [ 73.377377][ T4727] __dump_stack+0x30/0x40 [ 73.378071][ T4727] dump_stack_lvl+0xf4/0x15c [ 73.378943][ T4727] dump_stack+0x1c/0x5c [ 73.379682][ T4727] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.380699][ T4727] dccp_xmit_packet+0x298/0x460 [ 73.381592][ T4727] dccp_write_xmit+0x118/0x1d0 [ 73.382419][ T4727] dccp_sendmsg+0x510/0x850 [ 73.383182][ T4727] inet_sendmsg+0x154/0x27c [ 73.383881][ T4727] __sys_sendto+0x30c/0x420 [ 73.384729][ T4727] __arm64_sys_sendto+0xe4/0x104 [ 73.385610][ T4727] invoke_syscall+0x98/0x28c [ 73.386518][ T4727] el0_svc_common+0x13c/0x258 [ 73.387388][ T4727] do_el0_svc+0x5c/0x140 [ 73.388142][ T4727] el0_svc+0x78/0x1d0 [ 73.388846][ T4727] el0t_64_sync_handler+0xcc/0xe4 [ 73.389675][ T4727] el0t_64_sync+0x1a0/0x1a4 [ 73.390618][ T4727] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.392298][ T4727] CPU: 1 PID: 4727 Comm: syz.0.35 Not tainted syzkaller #0 [ 73.393433][ T4727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.395043][ T4727] Call trace: [ 73.395555][ T4727] dump_backtrace+0x0/0x458 [ 73.396364][ T4727] show_stack+0x2c/0x3c [ 73.397063][ T4727] __dump_stack+0x30/0x40 [ 73.397802][ T4727] dump_stack_lvl+0xf4/0x15c [ 73.398562][ T4727] dump_stack+0x1c/0x5c [ 73.399315][ T4727] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.400299][ T4727] dccp_xmit_packet+0x298/0x460 [ 73.401138][ T4727] dccp_write_xmit+0x118/0x1d0 [ 73.401989][ T4727] dccp_sendmsg+0x510/0x850 [ 73.402797][ T4727] inet_sendmsg+0x154/0x27c [ 73.403624][ T4727] __sys_sendto+0x30c/0x420 [ 73.404382][ T4727] __arm64_sys_sendto+0xe4/0x104 [ 73.405297][ T4727] invoke_syscall+0x98/0x28c [ 73.406067][ T4727] el0_svc_common+0x13c/0x258 [ 73.406889][ T4727] do_el0_svc+0x5c/0x140 [ 73.407679][ T4727] el0_svc+0x78/0x1d0 [ 73.408334][ T4727] el0t_64_sync_handler+0xcc/0xe4 [ 73.409148][ T4727] el0t_64_sync+0x1a0/0x1a4 [ 73.410357][ T4727] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.412169][ T4727] CPU: 1 PID: 4727 Comm: syz.0.35 Not tainted syzkaller #0 [ 73.413509][ T4727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.415225][ T4727] Call trace: [ 73.415758][ T4727] dump_backtrace+0x0/0x458 [ 73.416517][ T4727] show_stack+0x2c/0x3c [ 73.417175][ T4727] __dump_stack+0x30/0x40 [ 73.417875][ T4727] dump_stack_lvl+0xf4/0x15c [ 73.418618][ T4727] dump_stack+0x1c/0x5c [ 73.419212][ T4727] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.420156][ T4727] dccp_xmit_packet+0x298/0x460 [ 73.420982][ T4727] dccp_write_xmit+0x118/0x1d0 [ 73.421778][ T4727] dccp_sendmsg+0x510/0x850 [ 73.422512][ T4727] inet_sendmsg+0x154/0x27c [ 73.423220][ T4727] __sys_sendto+0x30c/0x420 [ 73.423917][ T4727] __arm64_sys_sendto+0xe4/0x104 [ 73.424685][ T4727] invoke_syscall+0x98/0x28c [ 73.425466][ T4727] el0_svc_common+0x13c/0x258 [ 73.426252][ T4727] do_el0_svc+0x5c/0x140 [ 73.426917][ T4727] el0_svc+0x78/0x1d0 [ 73.427581][ T4727] el0t_64_sync_handler+0xcc/0xe4 [ 73.428458][ T4727] el0t_64_sync+0x1a0/0x1a4 [ 73.429398][ T4727] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.431188][ T4727] CPU: 1 PID: 4727 Comm: syz.0.35 Not tainted syzkaller #0 [ 73.432397][ T4727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.433977][ T4727] Call trace: [ 73.434463][ T4727] dump_backtrace+0x0/0x458 [ 73.435178][ T4727] show_stack+0x2c/0x3c [ 73.435801][ T4727] __dump_stack+0x30/0x40 [ 73.436487][ T4727] dump_stack_lvl+0xf4/0x15c [ 73.437176][ T4727] dump_stack+0x1c/0x5c [ 73.437840][ T4727] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.438771][ T4727] dccp_xmit_packet+0x298/0x460 [ 73.439522][ T4727] dccp_write_xmit+0x118/0x1d0 [ 73.440374][ T4727] dccp_sendmsg+0x510/0x850 [ 73.441120][ T4727] inet_sendmsg+0x154/0x27c [ 73.441984][ T4727] __sys_sendto+0x30c/0x420 [ 73.442765][ T4727] __arm64_sys_sendto+0xe4/0x104 [ 73.443634][ T4727] invoke_syscall+0x98/0x28c [ 73.444461][ T4727] el0_svc_common+0x13c/0x258 [ 73.445247][ T4727] do_el0_svc+0x5c/0x140 [ 73.445922][ T4727] el0_svc+0x78/0x1d0 [ 73.446595][ T4727] el0t_64_sync_handler+0xcc/0xe4 [ 73.447428][ T4727] el0t_64_sync+0x1a0/0x1a4 [ 73.448944][ T4727] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.450699][ T4727] CPU: 1 PID: 4727 Comm: syz.0.35 Not tainted syzkaller #0 [ 73.451817][ T4727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.453443][ T4727] Call trace: [ 73.453959][ T4727] dump_backtrace+0x0/0x458 [ 73.454661][ T4727] show_stack+0x2c/0x3c [ 73.455301][ T4727] __dump_stack+0x30/0x40 [ 73.456028][ T4727] dump_stack_lvl+0xf4/0x15c [ 73.456753][ T4727] dump_stack+0x1c/0x5c [ 73.457410][ T4727] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.458227][ T4727] dccp_xmit_packet+0x298/0x460 [ 73.459066][ T4727] dccp_write_xmit+0x118/0x1d0 [ 73.459820][ T4727] dccp_sendmsg+0x510/0x850 [ 73.460600][ T4727] inet_sendmsg+0x154/0x27c [ 73.461372][ T4727] __sys_sendto+0x30c/0x420 [ 73.462143][ T4727] __arm64_sys_sendto+0xe4/0x104 [ 73.462936][ T4727] invoke_syscall+0x98/0x28c [ 73.463715][ T4727] el0_svc_common+0x13c/0x258 [ 73.464414][ T4727] do_el0_svc+0x5c/0x140 [ 73.465051][ T4727] el0_svc+0x78/0x1d0 [ 73.465815][ T4727] el0t_64_sync_handler+0xcc/0xe4 [ 73.466782][ T4727] el0t_64_sync+0x1a0/0x1a4 [ 73.467761][ T4727] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.469818][ T4727] CPU: 1 PID: 4727 Comm: syz.0.35 Not tainted syzkaller #0 [ 73.471073][ T4727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.472749][ T4727] Call trace: [ 73.473277][ T4727] dump_backtrace+0x0/0x458 [ 73.474070][ T4727] show_stack+0x2c/0x3c [ 73.474809][ T4727] __dump_stack+0x30/0x40 [ 73.475558][ T4727] dump_stack_lvl+0xf4/0x15c [ 73.476337][ T4727] dump_stack+0x1c/0x5c [ 73.476999][ T4727] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.477841][ T4727] dccp_xmit_packet+0x298/0x460 [ 73.478599][ T4727] dccp_write_xmit+0x118/0x1d0 [ 73.479369][ T4727] dccp_sendmsg+0x510/0x850 [ 73.480079][ T4727] inet_sendmsg+0x154/0x27c [ 73.480932][ T4727] __sys_sendto+0x30c/0x420 [ 73.481841][ T4727] __arm64_sys_sendto+0xe4/0x104 [ 73.482768][ T4727] invoke_syscall+0x98/0x28c [ 73.483656][ T4727] el0_svc_common+0x13c/0x258 [ 73.484559][ T4727] do_el0_svc+0x5c/0x140 [ 73.485341][ T4727] el0_svc+0x78/0x1d0 [ 73.486060][ T4727] el0t_64_sync_handler+0xcc/0xe4 [ 73.486928][ T4727] el0t_64_sync+0x1a0/0x1a4 [ 73.487819][ T4727] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.490043][ T4727] CPU: 1 PID: 4727 Comm: syz.0.35 Not tainted syzkaller #0 [ 73.491287][ T4727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.492884][ T4727] Call trace: [ 73.493380][ T4727] dump_backtrace+0x0/0x458 [ 73.494112][ T4727] show_stack+0x2c/0x3c [ 73.494764][ T4727] __dump_stack+0x30/0x40 [ 73.495469][ T4727] dump_stack_lvl+0xf4/0x15c [ 73.496199][ T4727] dump_stack+0x1c/0x5c [ 73.496759][ T4727] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.497644][ T4727] dccp_xmit_packet+0x298/0x460 [ 73.498511][ T4727] dccp_write_xmit+0x118/0x1d0 [ 73.499420][ T4727] dccp_sendmsg+0x510/0x850 [ 73.500257][ T4727] inet_sendmsg+0x154/0x27c [ 73.501059][ T4727] __sys_sendto+0x30c/0x420 [ 73.501784][ T4727] __arm64_sys_sendto+0xe4/0x104 [ 73.502581][ T4727] invoke_syscall+0x98/0x28c [ 73.503421][ T4727] el0_svc_common+0x13c/0x258 [ 73.504223][ T4727] do_el0_svc+0x5c/0x140 [ 73.505039][ T4727] el0_svc+0x78/0x1d0 [ 73.505801][ T4727] el0t_64_sync_handler+0xcc/0xe4 [ 73.506687][ T4727] el0t_64_sync+0x1a0/0x1a4 [ 73.507619][ T4727] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.509822][ T4727] CPU: 1 PID: 4727 Comm: syz.0.35 Not tainted syzkaller #0 [ 73.511013][ T4727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.512769][ T4727] Call trace: [ 73.513318][ T4727] dump_backtrace+0x0/0x458 [ 73.514070][ T4727] show_stack+0x2c/0x3c [ 73.514692][ T4727] __dump_stack+0x30/0x40 [ 73.515355][ T4727] dump_stack_lvl+0xf4/0x15c [ 73.516048][ T4727] dump_stack+0x1c/0x5c [ 73.516654][ T4727] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.517512][ T4727] dccp_xmit_packet+0x298/0x460 [ 73.518294][ T4727] dccp_write_xmit+0x118/0x1d0 [ 73.519057][ T4727] dccp_sendmsg+0x510/0x850 [ 73.519806][ T4727] inet_sendmsg+0x154/0x27c [ 73.520648][ T4727] __sys_sendto+0x30c/0x420 [ 73.521434][ T4727] __arm64_sys_sendto+0xe4/0x104 [ 73.522330][ T4727] invoke_syscall+0x98/0x28c [ 73.523068][ T4727] el0_svc_common+0x13c/0x258 [ 73.523842][ T4727] do_el0_svc+0x5c/0x140 [ 73.524568][ T4727] el0_svc+0x78/0x1d0 [ 73.525325][ T4727] el0t_64_sync_handler+0xcc/0xe4 [ 73.526222][ T4727] el0t_64_sync+0x1a0/0x1a4 [ 73.527184][ T4727] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.529548][ T4727] CPU: 1 PID: 4727 Comm: syz.0.35 Not tainted syzkaller #0 [ 73.530738][ T4727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.532298][ T4727] Call trace: [ 73.532798][ T4727] dump_backtrace+0x0/0x458 [ 73.533471][ T4727] show_stack+0x2c/0x3c [ 73.534137][ T4727] __dump_stack+0x30/0x40 [ 73.534779][ T4727] dump_stack_lvl+0xf4/0x15c [ 73.535497][ T4727] dump_stack+0x1c/0x5c [ 73.536098][ T4727] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.536893][ T4727] dccp_xmit_packet+0x298/0x460 [ 73.537574][ T4727] dccp_write_xmit+0x118/0x1d0 [ 73.538310][ T4727] dccp_sendmsg+0x510/0x850 [ 73.539059][ T4727] inet_sendmsg+0x154/0x27c [ 73.539834][ T4727] __sys_sendto+0x30c/0x420 [ 73.540608][ T4727] __arm64_sys_sendto+0xe4/0x104 [ 73.541463][ T4727] invoke_syscall+0x98/0x28c [ 73.542184][ T4727] el0_svc_common+0x13c/0x258 [ 73.542952][ T4727] do_el0_svc+0x5c/0x140 [ 73.543679][ T4727] el0_svc+0x78/0x1d0 [ 73.544319][ T4727] el0t_64_sync_handler+0xcc/0xe4 [ 73.545092][ T4727] el0t_64_sync+0x1a0/0x1a4 [ 73.546062][ T4727] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.547803][ T4727] CPU: 1 PID: 4727 Comm: syz.0.35 Not tainted syzkaller #0 [ 73.548947][ T4727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.550531][ T4727] Call trace: [ 73.551054][ T4727] dump_backtrace+0x0/0x458 [ 73.551845][ T4727] show_stack+0x2c/0x3c [ 73.552506][ T4727] __dump_stack+0x30/0x40 [ 73.553247][ T4727] dump_stack_lvl+0xf4/0x15c [ 73.553974][ T4727] dump_stack+0x1c/0x5c [ 73.554689][ T4727] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.555636][ T4727] dccp_xmit_packet+0x298/0x460 [ 73.556414][ T4727] dccp_write_xmit+0x118/0x1d0 [ 73.557233][ T4727] dccp_sendmsg+0x510/0x850 [ 73.557953][ T4727] inet_sendmsg+0x154/0x27c [ 73.558721][ T4727] __sys_sendto+0x30c/0x420 [ 73.559416][ T4727] __arm64_sys_sendto+0xe4/0x104 [ 73.560230][ T4727] invoke_syscall+0x98/0x28c [ 73.560977][ T4727] el0_svc_common+0x13c/0x258 [ 73.561735][ T4727] do_el0_svc+0x5c/0x140 [ 73.562432][ T4727] el0_svc+0x78/0x1d0 [ 73.563107][ T4727] el0t_64_sync_handler+0xcc/0xe4 [ 73.563977][ T4727] el0t_64_sync+0x1a0/0x1a4 [ 73.564940][ T4727] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.566785][ T4727] CPU: 1 PID: 4727 Comm: syz.0.35 Not tainted syzkaller #0 [ 73.567863][ T4727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.569497][ T4727] Call trace: [ 73.570053][ T4727] dump_backtrace+0x0/0x458 [ 73.570821][ T4727] show_stack+0x2c/0x3c [ 73.571500][ T4727] __dump_stack+0x30/0x40 [ 73.572240][ T4727] dump_stack_lvl+0xf4/0x15c [ 73.573012][ T4727] dump_stack+0x1c/0x5c [ 73.573705][ T4727] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.574591][ T4727] dccp_xmit_packet+0x298/0x460 [ 73.575422][ T4727] dccp_write_xmit+0x118/0x1d0 [ 73.576213][ T4727] dccp_sendmsg+0x510/0x850 [ 73.577016][ T4727] inet_sendmsg+0x154/0x27c [ 73.577705][ T4727] __sys_sendto+0x30c/0x420 [ 73.578468][ T4727] __arm64_sys_sendto+0xe4/0x104 [ 73.579249][ T4727] invoke_syscall+0x98/0x28c [ 73.580058][ T4727] el0_svc_common+0x13c/0x258 [ 73.580825][ T4727] do_el0_svc+0x5c/0x140 [ 73.581495][ T4727] el0_svc+0x78/0x1d0 [ 73.582167][ T4727] el0t_64_sync_handler+0xcc/0xe4 [ 73.582997][ T4727] el0t_64_sync+0x1a0/0x1a4 [ 73.595748][ T4729] net_ratelimit: 10 callbacks suppressed [ 73.595758][ T4729] dccp_xmit_packet: Payload too large (65475) for featneg. [ 73.604523][ T4729] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.606411][ T4729] CPU: 0 PID: 4729 Comm: syz.0.36 Not tainted syzkaller #0 [ 73.607680][ T4729] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.609304][ T4729] Call trace: [ 73.609853][ T4729] dump_backtrace+0x0/0x458 [ 73.610604][ T4729] show_stack+0x2c/0x3c [ 73.611289][ T4729] __dump_stack+0x30/0x40 [ 73.611897][ T4729] dump_stack_lvl+0xf4/0x15c [ 73.612640][ T4729] dump_stack+0x1c/0x5c [ 73.613354][ T4729] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.614244][ T4729] dccp_xmit_packet+0x298/0x460 [ 73.615021][ T4729] dccp_write_xmit+0x118/0x1d0 [ 73.615754][ T4729] dccp_sendmsg+0x510/0x850 [ 73.616530][ T4729] inet_sendmsg+0x154/0x27c [ 73.617264][ T4729] __sys_sendto+0x30c/0x420 [ 73.617995][ T4729] __arm64_sys_sendto+0xe4/0x104 [ 73.618781][ T4729] invoke_syscall+0x98/0x28c [ 73.619547][ T4729] el0_svc_common+0x13c/0x258 [ 73.620322][ T4729] do_el0_svc+0x5c/0x140 [ 73.620970][ T4729] el0_svc+0x78/0x1d0 [ 73.621670][ T4729] el0t_64_sync_handler+0xcc/0xe4 [ 73.622534][ T4729] el0t_64_sync+0x1a0/0x1a4 [ 73.627959][ T4729] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.630250][ T4729] CPU: 0 PID: 4729 Comm: syz.0.36 Not tainted syzkaller #0 [ 73.631394][ T4729] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.632984][ T4729] Call trace: [ 73.633510][ T4729] dump_backtrace+0x0/0x458 [ 73.634189][ T4729] show_stack+0x2c/0x3c [ 73.634793][ T4729] __dump_stack+0x30/0x40 [ 73.635442][ T4729] dump_stack_lvl+0xf4/0x15c [ 73.636086][ T4729] dump_stack+0x1c/0x5c [ 73.636688][ T4729] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.637535][ T4729] dccp_xmit_packet+0x298/0x460 [ 73.638275][ T4729] dccp_write_xmit+0x118/0x1d0 1970/01/01 00:01:13 executed programs: 22 [ 73.639129][ T4729] dccp_sendmsg+0x510/0x850 [ 73.639859][ T4729] inet_sendmsg+0x154/0x27c [ 73.640636][ T4729] __sys_sendto+0x30c/0x420 [ 73.641362][ T4729] __arm64_sys_sendto+0xe4/0x104 [ 73.642111][ T4729] invoke_syscall+0x98/0x28c [ 73.642841][ T4729] el0_svc_common+0x13c/0x258 [ 73.643505][ T4729] do_el0_svc+0x5c/0x140 [ 73.644170][ T4729] el0_svc+0x78/0x1d0 [ 73.644805][ T4729] el0t_64_sync_handler+0xcc/0xe4 [ 73.645614][ T4729] el0t_64_sync+0x1a0/0x1a4 [ 73.647599][ T4729] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.649660][ T4729] CPU: 1 PID: 4729 Comm: syz.0.36 Not tainted syzkaller #0 [ 73.650796][ T4729] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.652483][ T4729] Call trace: [ 73.652989][ T4729] dump_backtrace+0x0/0x458 [ 73.653675][ T4729] show_stack+0x2c/0x3c [ 73.654280][ T4729] __dump_stack+0x30/0x40 [ 73.654947][ T4729] dump_stack_lvl+0xf4/0x15c [ 73.655629][ T4729] dump_stack+0x1c/0x5c [ 73.656347][ T4729] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.657253][ T4729] dccp_xmit_packet+0x298/0x460 [ 73.658019][ T4729] dccp_write_xmit+0x118/0x1d0 [ 73.658838][ T4729] dccp_sendmsg+0x510/0x850 [ 73.659635][ T4729] inet_sendmsg+0x154/0x27c [ 73.660394][ T4729] __sys_sendto+0x30c/0x420 [ 73.661216][ T4729] __arm64_sys_sendto+0xe4/0x104 [ 73.662053][ T4729] invoke_syscall+0x98/0x28c [ 73.662795][ T4729] el0_svc_common+0x13c/0x258 [ 73.663528][ T4729] do_el0_svc+0x5c/0x140 [ 73.664187][ T4729] el0_svc+0x78/0x1d0 [ 73.664824][ T4729] el0t_64_sync_handler+0xcc/0xe4 [ 73.665790][ T4729] el0t_64_sync+0x1a0/0x1a4 [ 73.667144][ T4729] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.669065][ T4729] CPU: 1 PID: 4729 Comm: syz.0.36 Not tainted syzkaller #0 [ 73.670224][ T4729] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.671716][ T4729] Call trace: [ 73.672211][ T4729] dump_backtrace+0x0/0x458 [ 73.672894][ T4729] show_stack+0x2c/0x3c [ 73.673478][ T4729] __dump_stack+0x30/0x40 [ 73.674115][ T4729] dump_stack_lvl+0xf4/0x15c [ 73.674742][ T4729] dump_stack+0x1c/0x5c [ 73.675349][ T4729] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.676195][ T4729] dccp_xmit_packet+0x298/0x460 [ 73.676920][ T4729] dccp_write_xmit+0x118/0x1d0 [ 73.677729][ T4729] dccp_sendmsg+0x510/0x850 [ 73.678443][ T4729] inet_sendmsg+0x154/0x27c [ 73.679203][ T4729] __sys_sendto+0x30c/0x420 [ 73.679935][ T4729] __arm64_sys_sendto+0xe4/0x104 [ 73.680750][ T4729] invoke_syscall+0x98/0x28c [ 73.681504][ T4729] el0_svc_common+0x13c/0x258 [ 73.682311][ T4729] do_el0_svc+0x5c/0x140 [ 73.682979][ T4729] el0_svc+0x78/0x1d0 [ 73.683597][ T4729] el0t_64_sync_handler+0xcc/0xe4 [ 73.684417][ T4729] el0t_64_sync+0x1a0/0x1a4 [ 73.685347][ T4729] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.687134][ T4729] CPU: 1 PID: 4729 Comm: syz.0.36 Not tainted syzkaller #0 [ 73.688346][ T4729] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.690078][ T4729] Call trace: [ 73.690631][ T4729] dump_backtrace+0x0/0x458 [ 73.691435][ T4729] show_stack+0x2c/0x3c [ 73.692178][ T4729] __dump_stack+0x30/0x40 [ 73.692937][ T4729] dump_stack_lvl+0xf4/0x15c [ 73.693727][ T4729] dump_stack+0x1c/0x5c [ 73.694419][ T4729] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.695475][ T4729] dccp_xmit_packet+0x298/0x460 [ 73.696409][ T4729] dccp_write_xmit+0x118/0x1d0 [ 73.697304][ T4729] dccp_sendmsg+0x510/0x850 [ 73.698135][ T4729] inet_sendmsg+0x154/0x27c [ 73.698880][ T4729] __sys_sendto+0x30c/0x420 [ 73.699575][ T4729] __arm64_sys_sendto+0xe4/0x104 [ 73.700456][ T4729] invoke_syscall+0x98/0x28c [ 73.701235][ T4729] el0_svc_common+0x13c/0x258 [ 73.702023][ T4729] do_el0_svc+0x5c/0x140 [ 73.702724][ T4729] el0_svc+0x78/0x1d0 [ 73.703368][ T4729] el0t_64_sync_handler+0xcc/0xe4 [ 73.704159][ T4729] el0t_64_sync+0x1a0/0x1a4 [ 73.705320][ T4729] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.707087][ T4729] CPU: 1 PID: 4729 Comm: syz.0.36 Not tainted syzkaller #0 [ 73.708225][ T4729] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.709866][ T4729] Call trace: [ 73.710411][ T4729] dump_backtrace+0x0/0x458 [ 73.711254][ T4729] show_stack+0x2c/0x3c [ 73.712002][ T4729] __dump_stack+0x30/0x40 [ 73.712822][ T4729] dump_stack_lvl+0xf4/0x15c [ 73.713686][ T4729] dump_stack+0x1c/0x5c [ 73.714441][ T4729] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.715428][ T4729] dccp_xmit_packet+0x298/0x460 [ 73.716225][ T4729] dccp_write_xmit+0x118/0x1d0 [ 73.717018][ T4729] dccp_sendmsg+0x510/0x850 [ 73.717766][ T4729] inet_sendmsg+0x154/0x27c [ 73.718460][ T4729] __sys_sendto+0x30c/0x420 [ 73.719303][ T4729] __arm64_sys_sendto+0xe4/0x104 [ 73.720168][ T4729] invoke_syscall+0x98/0x28c [ 73.720967][ T4729] el0_svc_common+0x13c/0x258 [ 73.721753][ T4729] do_el0_svc+0x5c/0x140 [ 73.722510][ T4729] el0_svc+0x78/0x1d0 [ 73.723244][ T4729] el0t_64_sync_handler+0xcc/0xe4 [ 73.724057][ T4729] el0t_64_sync+0x1a0/0x1a4 [ 73.724947][ T4729] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.726865][ T4729] CPU: 1 PID: 4729 Comm: syz.0.36 Not tainted syzkaller #0 [ 73.728060][ T4729] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.729743][ T4729] Call trace: [ 73.730304][ T4729] dump_backtrace+0x0/0x458 [ 73.731018][ T4729] show_stack+0x2c/0x3c [ 73.731676][ T4729] __dump_stack+0x30/0x40 [ 73.732430][ T4729] dump_stack_lvl+0xf4/0x15c [ 73.733263][ T4729] dump_stack+0x1c/0x5c [ 73.733971][ T4729] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.734901][ T4729] dccp_xmit_packet+0x298/0x460 [ 73.735749][ T4729] dccp_write_xmit+0x118/0x1d0 [ 73.736489][ T4729] dccp_sendmsg+0x510/0x850 [ 73.737280][ T4729] inet_sendmsg+0x154/0x27c [ 73.738161][ T4729] __sys_sendto+0x30c/0x420 [ 73.739049][ T4729] __arm64_sys_sendto+0xe4/0x104 [ 73.739939][ T4729] invoke_syscall+0x98/0x28c [ 73.740681][ T4729] el0_svc_common+0x13c/0x258 [ 73.741441][ T4729] do_el0_svc+0x5c/0x140 [ 73.742224][ T4729] el0_svc+0x78/0x1d0 [ 73.742881][ T4729] el0t_64_sync_handler+0xcc/0xe4 [ 73.743694][ T4729] el0t_64_sync+0x1a0/0x1a4 [ 73.745706][ T4729] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.747936][ T4729] CPU: 0 PID: 4729 Comm: syz.0.36 Not tainted syzkaller #0 [ 73.749189][ T4729] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.750914][ T4729] Call trace: [ 73.751433][ T4729] dump_backtrace+0x0/0x458 [ 73.752172][ T4729] show_stack+0x2c/0x3c [ 73.752886][ T4729] __dump_stack+0x30/0x40 [ 73.753682][ T4729] dump_stack_lvl+0xf4/0x15c [ 73.754440][ T4729] dump_stack+0x1c/0x5c [ 73.755113][ T4729] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.756084][ T4729] dccp_xmit_packet+0x298/0x460 [ 73.756908][ T4729] dccp_write_xmit+0x118/0x1d0 [ 73.757697][ T4729] dccp_sendmsg+0x510/0x850 [ 73.758403][ T4729] inet_sendmsg+0x154/0x27c [ 73.759138][ T4729] __sys_sendto+0x30c/0x420 [ 73.759964][ T4729] __arm64_sys_sendto+0xe4/0x104 [ 73.760870][ T4729] invoke_syscall+0x98/0x28c [ 73.761611][ T4729] el0_svc_common+0x13c/0x258 [ 73.762379][ T4729] do_el0_svc+0x5c/0x140 [ 73.763069][ T4729] el0_svc+0x78/0x1d0 [ 73.763792][ T4729] el0t_64_sync_handler+0xcc/0xe4 [ 73.764583][ T4729] el0t_64_sync+0x1a0/0x1a4 [ 73.766372][ T4729] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.768395][ T4729] CPU: 0 PID: 4729 Comm: syz.0.36 Not tainted syzkaller #0 [ 73.769517][ T4729] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.770965][ T4729] Call trace: [ 73.771453][ T4729] dump_backtrace+0x0/0x458 [ 73.772159][ T4729] show_stack+0x2c/0x3c [ 73.772845][ T4729] __dump_stack+0x30/0x40 [ 73.773557][ T4729] dump_stack_lvl+0xf4/0x15c [ 73.774237][ T4729] dump_stack+0x1c/0x5c [ 73.774935][ T4729] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.775758][ T4729] dccp_xmit_packet+0x298/0x460 [ 73.776476][ T4729] dccp_write_xmit+0x118/0x1d0 [ 73.777187][ T4729] dccp_sendmsg+0x510/0x850 [ 73.777961][ T4729] inet_sendmsg+0x154/0x27c [ 73.778659][ T4729] __sys_sendto+0x30c/0x420 [ 73.779326][ T4729] __arm64_sys_sendto+0xe4/0x104 [ 73.780157][ T4729] invoke_syscall+0x98/0x28c [ 73.780959][ T4729] el0_svc_common+0x13c/0x258 [ 73.781766][ T4729] do_el0_svc+0x5c/0x140 [ 73.782522][ T4729] el0_svc+0x78/0x1d0 [ 73.783115][ T4729] el0t_64_sync_handler+0xcc/0xe4 [ 73.783905][ T4729] el0t_64_sync+0x1a0/0x1a4 [ 73.785543][ T4729] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.787316][ T4729] CPU: 0 PID: 4729 Comm: syz.0.36 Not tainted syzkaller #0 [ 73.788480][ T4729] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.790161][ T4729] Call trace: [ 73.790682][ T4729] dump_backtrace+0x0/0x458 [ 73.791415][ T4729] show_stack+0x2c/0x3c [ 73.792117][ T4729] __dump_stack+0x30/0x40 [ 73.792834][ T4729] dump_stack_lvl+0xf4/0x15c [ 73.793569][ T4729] dump_stack+0x1c/0x5c [ 73.794247][ T4729] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.795097][ T4729] dccp_xmit_packet+0x298/0x460 [ 73.795882][ T4729] dccp_write_xmit+0x118/0x1d0 [ 73.796676][ T4729] dccp_sendmsg+0x510/0x850 [ 73.797403][ T4729] inet_sendmsg+0x154/0x27c [ 73.798134][ T4729] __sys_sendto+0x30c/0x420 [ 73.798871][ T4729] __arm64_sys_sendto+0xe4/0x104 [ 73.799708][ T4729] invoke_syscall+0x98/0x28c [ 73.800443][ T4729] el0_svc_common+0x13c/0x258 [ 73.801201][ T4729] do_el0_svc+0x5c/0x140 [ 73.801876][ T4729] el0_svc+0x78/0x1d0 [ 73.802503][ T4729] el0t_64_sync_handler+0xcc/0xe4 [ 73.803262][ T4729] el0t_64_sync+0x1a0/0x1a4 [ 73.805301][ T4729] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.807133][ T4729] CPU: 0 PID: 4729 Comm: syz.0.36 Not tainted syzkaller #0 [ 73.808332][ T4729] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.809951][ T4729] Call trace: [ 73.810500][ T4729] dump_backtrace+0x0/0x458 [ 73.811198][ T4729] show_stack+0x2c/0x3c [ 73.811823][ T4729] __dump_stack+0x30/0x40 [ 73.812531][ T4729] dump_stack_lvl+0xf4/0x15c [ 73.813311][ T4729] dump_stack+0x1c/0x5c [ 73.813997][ T4729] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.814928][ T4729] dccp_xmit_packet+0x298/0x460 [ 73.815767][ T4729] dccp_write_xmit+0x118/0x1d0 [ 73.816504][ T4729] dccp_sendmsg+0x510/0x850 [ 73.817235][ T4729] inet_sendmsg+0x154/0x27c [ 73.817992][ T4729] __sys_sendto+0x30c/0x420 [ 73.818700][ T4729] __arm64_sys_sendto+0xe4/0x104 [ 73.819491][ T4729] invoke_syscall+0x98/0x28c [ 73.820217][ T4729] el0_svc_common+0x13c/0x258 [ 73.820912][ T4729] do_el0_svc+0x5c/0x140 [ 73.821533][ T4729] el0_svc+0x78/0x1d0 [ 73.822117][ T4729] el0t_64_sync_handler+0xcc/0xe4 [ 73.822969][ T4729] el0t_64_sync+0x1a0/0x1a4 [ 73.824562][ T4729] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.826139][ T4729] CPU: 0 PID: 4729 Comm: syz.0.36 Not tainted syzkaller #0 [ 73.827377][ T4729] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.828974][ T4729] Call trace: [ 73.829528][ T4729] dump_backtrace+0x0/0x458 [ 73.830280][ T4729] show_stack+0x2c/0x3c [ 73.830936][ T4729] __dump_stack+0x30/0x40 [ 73.831591][ T4729] dump_stack_lvl+0xf4/0x15c [ 73.832400][ T4729] dump_stack+0x1c/0x5c [ 73.833085][ T4729] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.834029][ T4729] dccp_xmit_packet+0x298/0x460 [ 73.834789][ T4729] dccp_write_xmit+0x118/0x1d0 [ 73.835532][ T4729] dccp_sendmsg+0x510/0x850 [ 73.836267][ T4729] inet_sendmsg+0x154/0x27c [ 73.837037][ T4729] __sys_sendto+0x30c/0x420 [ 73.837813][ T4729] __arm64_sys_sendto+0xe4/0x104 [ 73.838592][ T4729] invoke_syscall+0x98/0x28c [ 73.839302][ T4729] el0_svc_common+0x13c/0x258 [ 73.839996][ T4729] do_el0_svc+0x5c/0x140 [ 73.840667][ T4729] el0_svc+0x78/0x1d0 [ 73.841300][ T4729] el0t_64_sync_handler+0xcc/0xe4 [ 73.842153][ T4729] el0t_64_sync+0x1a0/0x1a4 [ 73.854862][ T4731] dccp_xmit_packet: Payload too large (65475) for featneg. [ 73.862878][ T4731] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.864600][ T4731] CPU: 0 PID: 4731 Comm: syz.0.37 Not tainted syzkaller #0 [ 73.865660][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.867377][ T4731] Call trace: [ 73.867858][ T4731] dump_backtrace+0x0/0x458 [ 73.868632][ T4731] show_stack+0x2c/0x3c [ 73.869357][ T4731] __dump_stack+0x30/0x40 [ 73.870144][ T4731] dump_stack_lvl+0xf4/0x15c [ 73.870919][ T4731] dump_stack+0x1c/0x5c [ 73.871591][ T4731] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.872451][ T4731] dccp_xmit_packet+0x298/0x460 [ 73.873251][ T4731] dccp_write_xmit+0x118/0x1d0 [ 73.874021][ T4731] dccp_sendmsg+0x510/0x850 [ 73.874741][ T4731] inet_sendmsg+0x154/0x27c [ 73.875540][ T4731] __sys_sendto+0x30c/0x420 [ 73.876354][ T4731] __arm64_sys_sendto+0xe4/0x104 [ 73.877158][ T4731] invoke_syscall+0x98/0x28c [ 73.877902][ T4731] el0_svc_common+0x13c/0x258 [ 73.878680][ T4731] do_el0_svc+0x5c/0x140 [ 73.879344][ T4731] el0_svc+0x78/0x1d0 [ 73.879950][ T4731] el0t_64_sync_handler+0xcc/0xe4 [ 73.880808][ T4731] el0t_64_sync+0x1a0/0x1a4 [ 73.882796][ T4731] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.884797][ T4731] CPU: 1 PID: 4731 Comm: syz.0.37 Not tainted syzkaller #0 [ 73.885952][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.887386][ T4731] Call trace: [ 73.887900][ T4731] dump_backtrace+0x0/0x458 [ 73.888789][ T4731] show_stack+0x2c/0x3c [ 73.889627][ T4731] __dump_stack+0x30/0x40 [ 73.890500][ T4731] dump_stack_lvl+0xf4/0x15c [ 73.891391][ T4731] dump_stack+0x1c/0x5c [ 73.892155][ T4731] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.893154][ T4731] dccp_xmit_packet+0x298/0x460 [ 73.893951][ T4731] dccp_write_xmit+0x118/0x1d0 [ 73.894766][ T4731] dccp_sendmsg+0x510/0x850 [ 73.895569][ T4731] inet_sendmsg+0x154/0x27c [ 73.896445][ T4731] __sys_sendto+0x30c/0x420 [ 73.897316][ T4731] __arm64_sys_sendto+0xe4/0x104 [ 73.898175][ T4731] invoke_syscall+0x98/0x28c [ 73.898981][ T4731] el0_svc_common+0x13c/0x258 [ 73.899930][ T4731] do_el0_svc+0x5c/0x140 [ 73.900803][ T4731] el0_svc+0x78/0x1d0 [ 73.901573][ T4731] el0t_64_sync_handler+0xcc/0xe4 [ 73.902421][ T4731] el0t_64_sync+0x1a0/0x1a4 [ 73.904979][ T4731] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.906775][ T4731] CPU: 0 PID: 4731 Comm: syz.0.37 Not tainted syzkaller #0 [ 73.907893][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.909532][ T4731] Call trace: [ 73.910118][ T4731] dump_backtrace+0x0/0x458 [ 73.910875][ T4731] show_stack+0x2c/0x3c [ 73.911529][ T4731] __dump_stack+0x30/0x40 [ 73.912248][ T4731] dump_stack_lvl+0xf4/0x15c [ 73.913034][ T4731] dump_stack+0x1c/0x5c [ 73.913707][ T4731] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.914769][ T4731] dccp_xmit_packet+0x298/0x460 [ 73.915684][ T4731] dccp_write_xmit+0x118/0x1d0 [ 73.916589][ T4731] dccp_sendmsg+0x510/0x850 [ 73.917502][ T4731] inet_sendmsg+0x154/0x27c [ 73.918372][ T4731] __sys_sendto+0x30c/0x420 [ 73.919157][ T4731] __arm64_sys_sendto+0xe4/0x104 [ 73.920034][ T4731] invoke_syscall+0x98/0x28c [ 73.920775][ T4731] el0_svc_common+0x13c/0x258 [ 73.921516][ T4731] do_el0_svc+0x5c/0x140 [ 73.922214][ T4731] el0_svc+0x78/0x1d0 [ 73.922876][ T4731] el0t_64_sync_handler+0xcc/0xe4 [ 73.923723][ T4731] el0t_64_sync+0x1a0/0x1a4 [ 73.925154][ T4731] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.926826][ T4731] CPU: 0 PID: 4731 Comm: syz.0.37 Not tainted syzkaller #0 [ 73.927973][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.929892][ T4731] Call trace: [ 73.930511][ T4731] dump_backtrace+0x0/0x458 [ 73.931345][ T4731] show_stack+0x2c/0x3c [ 73.932030][ T4731] __dump_stack+0x30/0x40 [ 73.932738][ T4731] dump_stack_lvl+0xf4/0x15c [ 73.933534][ T4731] dump_stack+0x1c/0x5c [ 73.934211][ T4731] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.934996][ T4731] dccp_xmit_packet+0x298/0x460 [ 73.935751][ T4731] dccp_write_xmit+0x118/0x1d0 [ 73.936470][ T4731] dccp_sendmsg+0x510/0x850 [ 73.937255][ T4731] inet_sendmsg+0x154/0x27c [ 73.937988][ T4731] __sys_sendto+0x30c/0x420 [ 73.938721][ T4731] __arm64_sys_sendto+0xe4/0x104 [ 73.939559][ T4731] invoke_syscall+0x98/0x28c [ 73.940318][ T4731] el0_svc_common+0x13c/0x258 [ 73.941047][ T4731] do_el0_svc+0x5c/0x140 [ 73.941753][ T4731] el0_svc+0x78/0x1d0 [ 73.942386][ T4731] el0t_64_sync_handler+0xcc/0xe4 [ 73.943264][ T4731] el0t_64_sync+0x1a0/0x1a4 [ 73.944558][ T4731] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.946269][ T4731] CPU: 0 PID: 4731 Comm: syz.0.37 Not tainted syzkaller #0 [ 73.947256][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.948672][ T4731] Call trace: [ 73.949213][ T4731] dump_backtrace+0x0/0x458 [ 73.949977][ T4731] show_stack+0x2c/0x3c [ 73.950648][ T4731] __dump_stack+0x30/0x40 [ 73.951399][ T4731] dump_stack_lvl+0xf4/0x15c [ 73.952149][ T4731] dump_stack+0x1c/0x5c [ 73.952878][ T4731] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.953802][ T4731] dccp_xmit_packet+0x298/0x460 [ 73.954617][ T4731] dccp_write_xmit+0x118/0x1d0 [ 73.955482][ T4731] dccp_sendmsg+0x510/0x850 [ 73.956265][ T4731] inet_sendmsg+0x154/0x27c [ 73.957038][ T4731] __sys_sendto+0x30c/0x420 [ 73.957924][ T4731] __arm64_sys_sendto+0xe4/0x104 [ 73.958806][ T4731] invoke_syscall+0x98/0x28c [ 73.959565][ T4731] el0_svc_common+0x13c/0x258 [ 73.960315][ T4731] do_el0_svc+0x5c/0x140 [ 73.961122][ T4731] el0_svc+0x78/0x1d0 [ 73.961868][ T4731] el0t_64_sync_handler+0xcc/0xe4 [ 73.962837][ T4731] el0t_64_sync+0x1a0/0x1a4 [ 73.963989][ T4731] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.965756][ T4731] CPU: 0 PID: 4731 Comm: syz.0.37 Not tainted syzkaller #0 [ 73.966850][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.968370][ T4731] Call trace: [ 73.968913][ T4731] dump_backtrace+0x0/0x458 [ 73.969717][ T4731] show_stack+0x2c/0x3c [ 73.970407][ T4731] __dump_stack+0x30/0x40 [ 73.971189][ T4731] dump_stack_lvl+0xf4/0x15c [ 73.971899][ T4731] dump_stack+0x1c/0x5c [ 73.972531][ T4731] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.973387][ T4731] dccp_xmit_packet+0x298/0x460 [ 73.974221][ T4731] dccp_write_xmit+0x118/0x1d0 [ 73.975005][ T4731] dccp_sendmsg+0x510/0x850 [ 73.975798][ T4731] inet_sendmsg+0x154/0x27c [ 73.976530][ T4731] __sys_sendto+0x30c/0x420 [ 73.977409][ T4731] __arm64_sys_sendto+0xe4/0x104 [ 73.978238][ T4731] invoke_syscall+0x98/0x28c [ 73.979020][ T4731] el0_svc_common+0x13c/0x258 [ 73.979780][ T4731] do_el0_svc+0x5c/0x140 [ 73.980480][ T4731] el0_svc+0x78/0x1d0 [ 73.981146][ T4731] el0t_64_sync_handler+0xcc/0xe4 [ 73.981945][ T4731] el0t_64_sync+0x1a0/0x1a4 [ 73.982907][ T4731] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 73.984586][ T4731] CPU: 0 PID: 4731 Comm: syz.0.37 Not tainted syzkaller #0 [ 73.985635][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.987218][ T4731] Call trace: [ 73.987777][ T4731] dump_backtrace+0x0/0x458 [ 73.988561][ T4731] show_stack+0x2c/0x3c [ 73.989335][ T4731] __dump_stack+0x30/0x40 [ 73.990085][ T4731] dump_stack_lvl+0xf4/0x15c [ 73.990931][ T4731] dump_stack+0x1c/0x5c [ 73.991637][ T4731] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 73.992623][ T4731] dccp_xmit_packet+0x298/0x460 [ 73.993424][ T4731] dccp_write_xmit+0x118/0x1d0 [ 73.994249][ T4731] dccp_sendmsg+0x510/0x850 [ 73.994988][ T4731] inet_sendmsg+0x154/0x27c [ 73.995832][ T4731] __sys_sendto+0x30c/0x420 [ 73.996629][ T4731] __arm64_sys_sendto+0xe4/0x104 [ 73.997464][ T4731] invoke_syscall+0x98/0x28c [ 73.998259][ T4731] el0_svc_common+0x13c/0x258 [ 73.999036][ T4731] do_el0_svc+0x5c/0x140 [ 73.999670][ T4731] el0_svc+0x78/0x1d0 [ 74.000313][ T4731] el0t_64_sync_handler+0xcc/0xe4 [ 74.001118][ T4731] el0t_64_sync+0x1a0/0x1a4 [ 74.002060][ T4731] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.003795][ T4731] CPU: 0 PID: 4731 Comm: syz.0.37 Not tainted syzkaller #0 [ 74.004955][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.006373][ T4731] Call trace: [ 74.006905][ T4731] dump_backtrace+0x0/0x458 [ 74.007586][ T4731] show_stack+0x2c/0x3c [ 74.008174][ T4731] __dump_stack+0x30/0x40 [ 74.008839][ T4731] dump_stack_lvl+0xf4/0x15c [ 74.009506][ T4731] dump_stack+0x1c/0x5c [ 74.010138][ T4731] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.011153][ T4731] dccp_xmit_packet+0x298/0x460 [ 74.011978][ T4731] dccp_write_xmit+0x118/0x1d0 [ 74.012787][ T4731] dccp_sendmsg+0x510/0x850 [ 74.013478][ T4731] inet_sendmsg+0x154/0x27c [ 74.014145][ T4731] __sys_sendto+0x30c/0x420 [ 74.014873][ T4731] __arm64_sys_sendto+0xe4/0x104 [ 74.015703][ T4731] invoke_syscall+0x98/0x28c [ 74.016368][ T4731] el0_svc_common+0x13c/0x258 [ 74.017117][ T4731] do_el0_svc+0x5c/0x140 [ 74.017837][ T4731] el0_svc+0x78/0x1d0 [ 74.018507][ T4731] el0t_64_sync_handler+0xcc/0xe4 [ 74.019348][ T4731] el0t_64_sync+0x1a0/0x1a4 [ 74.020327][ T4731] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.021967][ T4731] CPU: 0 PID: 4731 Comm: syz.0.37 Not tainted syzkaller #0 [ 74.022998][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.024650][ T4731] Call trace: [ 74.025159][ T4731] dump_backtrace+0x0/0x458 [ 74.025810][ T4731] show_stack+0x2c/0x3c [ 74.026406][ T4731] __dump_stack+0x30/0x40 [ 74.027063][ T4731] dump_stack_lvl+0xf4/0x15c [ 74.027780][ T4731] dump_stack+0x1c/0x5c [ 74.028393][ T4731] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.029327][ T4731] dccp_xmit_packet+0x298/0x460 [ 74.030225][ T4731] dccp_write_xmit+0x118/0x1d0 [ 74.031047][ T4731] dccp_sendmsg+0x510/0x850 [ 74.031751][ T4731] inet_sendmsg+0x154/0x27c [ 74.032498][ T4731] __sys_sendto+0x30c/0x420 [ 74.033201][ T4731] __arm64_sys_sendto+0xe4/0x104 [ 74.033942][ T4731] invoke_syscall+0x98/0x28c [ 74.034679][ T4731] el0_svc_common+0x13c/0x258 [ 74.035490][ T4731] do_el0_svc+0x5c/0x140 [ 74.036155][ T4731] el0_svc+0x78/0x1d0 [ 74.036759][ T4731] el0t_64_sync_handler+0xcc/0xe4 [ 74.037587][ T4731] el0t_64_sync+0x1a0/0x1a4 [ 74.038915][ T4731] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.040614][ T4731] CPU: 0 PID: 4731 Comm: syz.0.37 Not tainted syzkaller #0 [ 74.041673][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.043109][ T4731] Call trace: [ 74.043635][ T4731] dump_backtrace+0x0/0x458 [ 74.044240][ T4731] show_stack+0x2c/0x3c [ 74.044917][ T4731] __dump_stack+0x30/0x40 [ 74.045576][ T4731] dump_stack_lvl+0xf4/0x15c [ 74.046314][ T4731] dump_stack+0x1c/0x5c [ 74.046965][ T4731] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.047760][ T4731] dccp_xmit_packet+0x298/0x460 [ 74.048459][ T4731] dccp_write_xmit+0x118/0x1d0 [ 74.049233][ T4731] dccp_sendmsg+0x510/0x850 [ 74.049954][ T4731] inet_sendmsg+0x154/0x27c [ 74.050650][ T4731] __sys_sendto+0x30c/0x420 [ 74.051390][ T4731] __arm64_sys_sendto+0xe4/0x104 [ 74.052217][ T4731] invoke_syscall+0x98/0x28c [ 74.053038][ T4731] el0_svc_common+0x13c/0x258 [ 74.053837][ T4731] do_el0_svc+0x5c/0x140 [ 74.054569][ T4731] el0_svc+0x78/0x1d0 [ 74.055316][ T4731] el0t_64_sync_handler+0xcc/0xe4 [ 74.056272][ T4731] el0t_64_sync+0x1a0/0x1a4 [ 74.057444][ T4731] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.059347][ T4731] CPU: 0 PID: 4731 Comm: syz.0.37 Not tainted syzkaller #0 [ 74.060505][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.061944][ T4731] Call trace: [ 74.062437][ T4731] dump_backtrace+0x0/0x458 [ 74.063078][ T4731] show_stack+0x2c/0x3c [ 74.063688][ T4731] __dump_stack+0x30/0x40 [ 74.064367][ T4731] dump_stack_lvl+0xf4/0x15c [ 74.065105][ T4731] dump_stack+0x1c/0x5c [ 74.065693][ T4731] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.066493][ T4731] dccp_xmit_packet+0x298/0x460 [ 74.067206][ T4731] dccp_write_xmit+0x118/0x1d0 [ 74.067919][ T4731] dccp_sendmsg+0x510/0x850 [ 74.068730][ T4731] inet_sendmsg+0x154/0x27c [ 74.069518][ T4731] __sys_sendto+0x30c/0x420 [ 74.070365][ T4731] __arm64_sys_sendto+0xe4/0x104 [ 74.071247][ T4731] invoke_syscall+0x98/0x28c [ 74.072019][ T4731] el0_svc_common+0x13c/0x258 [ 74.072767][ T4731] do_el0_svc+0x5c/0x140 [ 74.073431][ T4731] el0_svc+0x78/0x1d0 [ 74.074051][ T4731] el0t_64_sync_handler+0xcc/0xe4 [ 74.074929][ T4731] el0t_64_sync+0x1a0/0x1a4 [ 74.076011][ T4731] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.077785][ T4731] CPU: 0 PID: 4731 Comm: syz.0.37 Not tainted syzkaller #0 [ 74.078843][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.080379][ T4731] Call trace: [ 74.080969][ T4731] dump_backtrace+0x0/0x458 [ 74.081683][ T4731] show_stack+0x2c/0x3c [ 74.082406][ T4731] __dump_stack+0x30/0x40 [ 74.083149][ T4731] dump_stack_lvl+0xf4/0x15c [ 74.083906][ T4731] dump_stack+0x1c/0x5c [ 74.084616][ T4731] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.085582][ T4731] dccp_xmit_packet+0x298/0x460 [ 74.086387][ T4731] dccp_write_xmit+0x118/0x1d0 [ 74.087134][ T4731] dccp_sendmsg+0x510/0x850 [ 74.087898][ T4731] inet_sendmsg+0x154/0x27c [ 74.088675][ T4731] __sys_sendto+0x30c/0x420 [ 74.089398][ T4731] __arm64_sys_sendto+0xe4/0x104 [ 74.090257][ T4731] invoke_syscall+0x98/0x28c [ 74.090966][ T4731] el0_svc_common+0x13c/0x258 [ 74.091751][ T4731] do_el0_svc+0x5c/0x140 [ 74.092451][ T4731] el0_svc+0x78/0x1d0 [ 74.093072][ T4731] el0t_64_sync_handler+0xcc/0xe4 [ 74.093870][ T4731] el0t_64_sync+0x1a0/0x1a4 [ 74.106188][ T4733] dccp_xmit_packet: Payload too large (65475) for featneg. [ 74.113443][ T4733] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.115258][ T4733] CPU: 0 PID: 4733 Comm: syz.0.38 Not tainted syzkaller #0 [ 74.116339][ T4733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.117875][ T4733] Call trace: [ 74.118417][ T4733] dump_backtrace+0x0/0x458 [ 74.119202][ T4733] show_stack+0x2c/0x3c [ 74.119868][ T4733] __dump_stack+0x30/0x40 [ 74.120587][ T4733] dump_stack_lvl+0xf4/0x15c [ 74.121311][ T4733] dump_stack+0x1c/0x5c [ 74.121960][ T4733] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.122838][ T4733] dccp_xmit_packet+0x298/0x460 [ 74.123637][ T4733] dccp_write_xmit+0x118/0x1d0 [ 74.124413][ T4733] dccp_sendmsg+0x510/0x850 [ 74.125134][ T4733] inet_sendmsg+0x154/0x27c [ 74.125839][ T4733] __sys_sendto+0x30c/0x420 [ 74.126549][ T4733] __arm64_sys_sendto+0xe4/0x104 [ 74.127360][ T4733] invoke_syscall+0x98/0x28c [ 74.128129][ T4733] el0_svc_common+0x13c/0x258 [ 74.128912][ T4733] do_el0_svc+0x5c/0x140 [ 74.129613][ T4733] el0_svc+0x78/0x1d0 [ 74.130238][ T4733] el0t_64_sync_handler+0xcc/0xe4 [ 74.131046][ T4733] el0t_64_sync+0x1a0/0x1a4 [ 74.131999][ T4733] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.133788][ T4733] CPU: 0 PID: 4733 Comm: syz.0.38 Not tainted syzkaller #0 [ 74.134879][ T4733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.136458][ T4733] Call trace: [ 74.136951][ T4733] dump_backtrace+0x0/0x458 [ 74.137613][ T4733] show_stack+0x2c/0x3c [ 74.138255][ T4733] __dump_stack+0x30/0x40 [ 74.139017][ T4733] dump_stack_lvl+0xf4/0x15c [ 74.139736][ T4733] dump_stack+0x1c/0x5c [ 74.140373][ T4733] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.141215][ T4733] dccp_xmit_packet+0x298/0x460 [ 74.142011][ T4733] dccp_write_xmit+0x118/0x1d0 [ 74.142758][ T4733] dccp_sendmsg+0x510/0x850 [ 74.143558][ T4733] inet_sendmsg+0x154/0x27c [ 74.144327][ T4733] __sys_sendto+0x30c/0x420 [ 74.145051][ T4733] __arm64_sys_sendto+0xe4/0x104 [ 74.145811][ T4733] invoke_syscall+0x98/0x28c [ 74.146599][ T4733] el0_svc_common+0x13c/0x258 [ 74.147385][ T4733] do_el0_svc+0x5c/0x140 [ 74.148127][ T4733] el0_svc+0x78/0x1d0 [ 74.148807][ T4733] el0t_64_sync_handler+0xcc/0xe4 [ 74.149622][ T4733] el0t_64_sync+0x1a0/0x1a4 [ 74.150983][ T4733] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.152782][ T4733] CPU: 0 PID: 4733 Comm: syz.0.38 Not tainted syzkaller #0 [ 74.153945][ T4733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.155469][ T4733] Call trace: [ 74.155984][ T4733] dump_backtrace+0x0/0x458 [ 74.156740][ T4733] show_stack+0x2c/0x3c [ 74.157483][ T4733] __dump_stack+0x30/0x40 [ 74.158213][ T4733] dump_stack_lvl+0xf4/0x15c [ 74.158945][ T4733] dump_stack+0x1c/0x5c [ 74.159564][ T4733] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.160361][ T4733] dccp_xmit_packet+0x298/0x460 [ 74.161151][ T4733] dccp_write_xmit+0x118/0x1d0 [ 74.161940][ T4733] dccp_sendmsg+0x510/0x850 [ 74.162683][ T4733] inet_sendmsg+0x154/0x27c [ 74.163414][ T4733] __sys_sendto+0x30c/0x420 [ 74.164126][ T4733] __arm64_sys_sendto+0xe4/0x104 [ 74.164934][ T4733] invoke_syscall+0x98/0x28c [ 74.165766][ T4733] el0_svc_common+0x13c/0x258 [ 74.166583][ T4733] do_el0_svc+0x5c/0x140 [ 74.167280][ T4733] el0_svc+0x78/0x1d0 [ 74.167928][ T4733] el0t_64_sync_handler+0xcc/0xe4 [ 74.168772][ T4733] el0t_64_sync+0x1a0/0x1a4 [ 74.170074][ T4733] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.171730][ T4733] CPU: 0 PID: 4733 Comm: syz.0.38 Not tainted syzkaller #0 [ 74.172851][ T4733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.174402][ T4733] Call trace: [ 74.174906][ T4733] dump_backtrace+0x0/0x458 [ 74.175545][ T4733] show_stack+0x2c/0x3c [ 74.176203][ T4733] __dump_stack+0x30/0x40 [ 74.176830][ T4733] dump_stack_lvl+0xf4/0x15c [ 74.177559][ T4733] dump_stack+0x1c/0x5c [ 74.178226][ T4733] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.179175][ T4733] dccp_xmit_packet+0x298/0x460 [ 74.179998][ T4733] dccp_write_xmit+0x118/0x1d0 [ 74.180786][ T4733] dccp_sendmsg+0x510/0x850 [ 74.181499][ T4733] inet_sendmsg+0x154/0x27c [ 74.182183][ T4733] __sys_sendto+0x30c/0x420 [ 74.182908][ T4733] __arm64_sys_sendto+0xe4/0x104 [ 74.183661][ T4733] invoke_syscall+0x98/0x28c [ 74.184414][ T4733] el0_svc_common+0x13c/0x258 [ 74.185137][ T4733] do_el0_svc+0x5c/0x140 [ 74.185781][ T4733] el0_svc+0x78/0x1d0 [ 74.186359][ T4733] el0t_64_sync_handler+0xcc/0xe4 [ 74.187166][ T4733] el0t_64_sync+0x1a0/0x1a4 [ 74.188505][ T4733] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.190285][ T4733] CPU: 0 PID: 4733 Comm: syz.0.38 Not tainted syzkaller #0 [ 74.191319][ T4733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.192866][ T4733] Call trace: [ 74.193363][ T4733] dump_backtrace+0x0/0x458 [ 74.194042][ T4733] show_stack+0x2c/0x3c [ 74.194664][ T4733] __dump_stack+0x30/0x40 [ 74.195314][ T4733] dump_stack_lvl+0xf4/0x15c [ 74.196074][ T4733] dump_stack+0x1c/0x5c [ 74.196725][ T4733] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.197505][ T4733] dccp_xmit_packet+0x298/0x460 [ 74.198176][ T4733] dccp_write_xmit+0x118/0x1d0 [ 74.198932][ T4733] dccp_sendmsg+0x510/0x850 [ 74.199622][ T4733] inet_sendmsg+0x154/0x27c [ 74.200351][ T4733] __sys_sendto+0x30c/0x420 [ 74.201122][ T4733] __arm64_sys_sendto+0xe4/0x104 [ 74.201869][ T4733] invoke_syscall+0x98/0x28c [ 74.202612][ T4733] el0_svc_common+0x13c/0x258 [ 74.203401][ T4733] do_el0_svc+0x5c/0x140 [ 74.204161][ T4733] el0_svc+0x78/0x1d0 [ 74.204812][ T4733] el0t_64_sync_handler+0xcc/0xe4 [ 74.205566][ T4733] el0t_64_sync+0x1a0/0x1a4 [ 74.206489][ T4733] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.208222][ T4733] CPU: 0 PID: 4733 Comm: syz.0.38 Not tainted syzkaller #0 [ 74.209249][ T4733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.210762][ T4733] Call trace: [ 74.211292][ T4733] dump_backtrace+0x0/0x458 [ 74.211980][ T4733] show_stack+0x2c/0x3c [ 74.212613][ T4733] __dump_stack+0x30/0x40 [ 74.213288][ T4733] dump_stack_lvl+0xf4/0x15c [ 74.214102][ T4733] dump_stack+0x1c/0x5c [ 74.214865][ T4733] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.215760][ T4733] dccp_xmit_packet+0x298/0x460 [ 74.216551][ T4733] dccp_write_xmit+0x118/0x1d0 [ 74.217250][ T4733] dccp_sendmsg+0x510/0x850 [ 74.217977][ T4733] inet_sendmsg+0x154/0x27c [ 74.218760][ T4733] __sys_sendto+0x30c/0x420 [ 74.219584][ T4733] __arm64_sys_sendto+0xe4/0x104 [ 74.220431][ T4733] invoke_syscall+0x98/0x28c [ 74.221199][ T4733] el0_svc_common+0x13c/0x258 [ 74.222014][ T4733] do_el0_svc+0x5c/0x140 [ 74.222691][ T4733] el0_svc+0x78/0x1d0 [ 74.223319][ T4733] el0t_64_sync_handler+0xcc/0xe4 [ 74.224201][ T4733] el0t_64_sync+0x1a0/0x1a4 [ 74.225150][ T4733] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.226775][ T4733] CPU: 0 PID: 4733 Comm: syz.0.38 Not tainted syzkaller #0 [ 74.227881][ T4733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.229593][ T4733] Call trace: [ 74.230133][ T4733] dump_backtrace+0x0/0x458 [ 74.230969][ T4733] show_stack+0x2c/0x3c [ 74.231741][ T4733] __dump_stack+0x30/0x40 [ 74.232543][ T4733] dump_stack_lvl+0xf4/0x15c [ 74.233310][ T4733] dump_stack+0x1c/0x5c [ 74.234039][ T4733] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.234922][ T4733] dccp_xmit_packet+0x298/0x460 [ 74.235756][ T4733] dccp_write_xmit+0x118/0x1d0 [ 74.236553][ T4733] dccp_sendmsg+0x510/0x850 [ 74.237299][ T4733] inet_sendmsg+0x154/0x27c [ 74.238128][ T4733] __sys_sendto+0x30c/0x420 [ 74.238875][ T4733] __arm64_sys_sendto+0xe4/0x104 [ 74.239712][ T4733] invoke_syscall+0x98/0x28c [ 74.240429][ T4733] el0_svc_common+0x13c/0x258 [ 74.241199][ T4733] do_el0_svc+0x5c/0x140 [ 74.241915][ T4733] el0_svc+0x78/0x1d0 [ 74.242501][ T4733] el0t_64_sync_handler+0xcc/0xe4 [ 74.243392][ T4733] el0t_64_sync+0x1a0/0x1a4 [ 74.244424][ T4733] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.246152][ T4733] CPU: 0 PID: 4733 Comm: syz.0.38 Not tainted syzkaller #0 [ 74.247158][ T4733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.248730][ T4733] Call trace: [ 74.249321][ T4733] dump_backtrace+0x0/0x458 [ 74.250072][ T4733] show_stack+0x2c/0x3c [ 74.250727][ T4733] __dump_stack+0x30/0x40 [ 74.251404][ T4733] dump_stack_lvl+0xf4/0x15c [ 74.252149][ T4733] dump_stack+0x1c/0x5c [ 74.252802][ T4733] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.253641][ T4733] dccp_xmit_packet+0x298/0x460 [ 74.254483][ T4733] dccp_write_xmit+0x118/0x1d0 [ 74.255207][ T4733] dccp_sendmsg+0x510/0x850 [ 74.255920][ T4733] inet_sendmsg+0x154/0x27c [ 74.256644][ T4733] __sys_sendto+0x30c/0x420 [ 74.257377][ T4733] __arm64_sys_sendto+0xe4/0x104 [ 74.258163][ T4733] invoke_syscall+0x98/0x28c [ 74.259051][ T4733] el0_svc_common+0x13c/0x258 [ 74.259865][ T4733] do_el0_svc+0x5c/0x140 [ 74.260592][ T4733] el0_svc+0x78/0x1d0 [ 74.261255][ T4733] el0t_64_sync_handler+0xcc/0xe4 [ 74.262073][ T4733] el0t_64_sync+0x1a0/0x1a4 [ 74.263925][ T4733] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.265502][ T4733] CPU: 0 PID: 4733 Comm: syz.0.38 Not tainted syzkaller #0 [ 74.266610][ T4733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.268116][ T4733] Call trace: [ 74.268589][ T4733] dump_backtrace+0x0/0x458 [ 74.269364][ T4733] show_stack+0x2c/0x3c [ 74.269978][ T4733] __dump_stack+0x30/0x40 [ 74.270829][ T4733] dump_stack_lvl+0xf4/0x15c [ 74.271680][ T4733] dump_stack+0x1c/0x5c [ 74.272503][ T4733] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.273454][ T4733] dccp_xmit_packet+0x298/0x460 [ 74.274273][ T4733] dccp_write_xmit+0x118/0x1d0 [ 74.275124][ T4733] dccp_sendmsg+0x510/0x850 [ 74.275915][ T4733] inet_sendmsg+0x154/0x27c [ 74.276656][ T4733] __sys_sendto+0x30c/0x420 [ 74.277415][ T4733] __arm64_sys_sendto+0xe4/0x104 [ 74.278265][ T4733] invoke_syscall+0x98/0x28c [ 74.279067][ T4733] el0_svc_common+0x13c/0x258 [ 74.279802][ T4733] do_el0_svc+0x5c/0x140 [ 74.280497][ T4733] el0_svc+0x78/0x1d0 [ 74.281163][ T4733] el0t_64_sync_handler+0xcc/0xe4 [ 74.281993][ T4733] el0t_64_sync+0x1a0/0x1a4 [ 74.282981][ T4733] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.284632][ T4733] CPU: 0 PID: 4733 Comm: syz.0.38 Not tainted syzkaller #0 [ 74.285675][ T4733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.287484][ T4733] Call trace: [ 74.288029][ T4733] dump_backtrace+0x0/0x458 [ 74.288753][ T4733] show_stack+0x2c/0x3c [ 74.289431][ T4733] __dump_stack+0x30/0x40 [ 74.290085][ T4733] dump_stack_lvl+0xf4/0x15c [ 74.290820][ T4733] dump_stack+0x1c/0x5c [ 74.291511][ T4733] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.292410][ T4733] dccp_xmit_packet+0x298/0x460 [ 74.293161][ T4733] dccp_write_xmit+0x118/0x1d0 [ 74.293926][ T4733] dccp_sendmsg+0x510/0x850 [ 74.294672][ T4733] inet_sendmsg+0x154/0x27c [ 74.295388][ T4733] __sys_sendto+0x30c/0x420 [ 74.296114][ T4733] __arm64_sys_sendto+0xe4/0x104 [ 74.296931][ T4733] invoke_syscall+0x98/0x28c [ 74.297643][ T4733] el0_svc_common+0x13c/0x258 [ 74.298407][ T4733] do_el0_svc+0x5c/0x140 [ 74.299053][ T4733] el0_svc+0x78/0x1d0 [ 74.299669][ T4733] el0t_64_sync_handler+0xcc/0xe4 [ 74.300482][ T4733] el0t_64_sync+0x1a0/0x1a4 [ 74.301608][ T4733] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.303407][ T4733] CPU: 0 PID: 4733 Comm: syz.0.38 Not tainted syzkaller #0 [ 74.304472][ T4733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.305915][ T4733] Call trace: [ 74.306391][ T4733] dump_backtrace+0x0/0x458 [ 74.307082][ T4733] show_stack+0x2c/0x3c [ 74.307773][ T4733] __dump_stack+0x30/0x40 [ 74.308503][ T4733] dump_stack_lvl+0xf4/0x15c [ 74.309278][ T4733] dump_stack+0x1c/0x5c [ 74.310090][ T4733] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.311071][ T4733] dccp_xmit_packet+0x298/0x460 [ 74.312014][ T4733] dccp_write_xmit+0x118/0x1d0 [ 74.312784][ T4733] dccp_sendmsg+0x510/0x850 [ 74.313589][ T4733] inet_sendmsg+0x154/0x27c [ 74.314291][ T4733] __sys_sendto+0x30c/0x420 [ 74.314986][ T4733] __arm64_sys_sendto+0xe4/0x104 [ 74.315831][ T4733] invoke_syscall+0x98/0x28c [ 74.316697][ T4733] el0_svc_common+0x13c/0x258 [ 74.317585][ T4733] do_el0_svc+0x5c/0x140 [ 74.318363][ T4733] el0_svc+0x78/0x1d0 [ 74.319017][ T4733] el0t_64_sync_handler+0xcc/0xe4 [ 74.319854][ T4733] el0t_64_sync+0x1a0/0x1a4 [ 74.320866][ T4733] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.322686][ T4733] CPU: 0 PID: 4733 Comm: syz.0.38 Not tainted syzkaller #0 [ 74.323887][ T4733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.325524][ T4733] Call trace: [ 74.326025][ T4733] dump_backtrace+0x0/0x458 [ 74.326692][ T4733] show_stack+0x2c/0x3c [ 74.327320][ T4733] __dump_stack+0x30/0x40 [ 74.327977][ T4733] dump_stack_lvl+0xf4/0x15c [ 74.328727][ T4733] dump_stack+0x1c/0x5c [ 74.329394][ T4733] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.330258][ T4733] dccp_xmit_packet+0x298/0x460 [ 74.331091][ T4733] dccp_write_xmit+0x118/0x1d0 [ 74.331812][ T4733] dccp_sendmsg+0x510/0x850 [ 74.332483][ T4733] inet_sendmsg+0x154/0x27c [ 74.333220][ T4733] __sys_sendto+0x30c/0x420 [ 74.333991][ T4733] __arm64_sys_sendto+0xe4/0x104 [ 74.334821][ T4733] invoke_syscall+0x98/0x28c [ 74.335668][ T4733] el0_svc_common+0x13c/0x258 [ 74.336519][ T4733] do_el0_svc+0x5c/0x140 [ 74.337283][ T4733] el0_svc+0x78/0x1d0 [ 74.337932][ T4733] el0t_64_sync_handler+0xcc/0xe4 [ 74.338827][ T4733] el0t_64_sync+0x1a0/0x1a4 [ 74.339895][ T4733] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.341585][ T4733] CPU: 0 PID: 4733 Comm: syz.0.38 Not tainted syzkaller #0 [ 74.342628][ T4733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.344198][ T4733] Call trace: [ 74.344662][ T4733] dump_backtrace+0x0/0x458 [ 74.345338][ T4733] show_stack+0x2c/0x3c [ 74.345956][ T4733] __dump_stack+0x30/0x40 [ 74.346608][ T4733] dump_stack_lvl+0xf4/0x15c [ 74.347274][ T4733] dump_stack+0x1c/0x5c [ 74.347886][ T4733] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.348849][ T4733] dccp_xmit_packet+0x298/0x460 [ 74.349618][ T4733] dccp_write_xmit+0x118/0x1d0 [ 74.350475][ T4733] dccp_sendmsg+0x510/0x850 [ 74.351220][ T4733] inet_sendmsg+0x154/0x27c [ 74.351940][ T4733] __sys_sendto+0x30c/0x420 [ 74.352700][ T4733] __arm64_sys_sendto+0xe4/0x104 [ 74.353503][ T4733] invoke_syscall+0x98/0x28c [ 74.354238][ T4733] el0_svc_common+0x13c/0x258 [ 74.355019][ T4733] do_el0_svc+0x5c/0x140 [ 74.355747][ T4733] el0_svc+0x78/0x1d0 [ 74.356408][ T4733] el0t_64_sync_handler+0xcc/0xe4 [ 74.357250][ T4733] el0t_64_sync+0x1a0/0x1a4 [ 74.358780][ T4733] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.360749][ T4733] CPU: 0 PID: 4733 Comm: syz.0.38 Not tainted syzkaller #0 [ 74.361922][ T4733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.363517][ T4733] Call trace: [ 74.364042][ T4733] dump_backtrace+0x0/0x458 [ 74.364669][ T4733] show_stack+0x2c/0x3c [ 74.365293][ T4733] __dump_stack+0x30/0x40 [ 74.366011][ T4733] dump_stack_lvl+0xf4/0x15c [ 74.366760][ T4733] dump_stack+0x1c/0x5c [ 74.367355][ T4733] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.368200][ T4733] dccp_xmit_packet+0x298/0x460 [ 74.368977][ T4733] dccp_write_xmit+0x118/0x1d0 [ 74.369781][ T4733] dccp_sendmsg+0x510/0x850 [ 74.370445][ T4733] inet_sendmsg+0x154/0x27c [ 74.371214][ T4733] __sys_sendto+0x30c/0x420 [ 74.371958][ T4733] __arm64_sys_sendto+0xe4/0x104 [ 74.372745][ T4733] invoke_syscall+0x98/0x28c [ 74.373521][ T4733] el0_svc_common+0x13c/0x258 [ 74.374379][ T4733] do_el0_svc+0x5c/0x140 [ 74.375099][ T4733] el0_svc+0x78/0x1d0 [ 74.375878][ T4733] el0t_64_sync_handler+0xcc/0xe4 [ 74.376763][ T4733] el0t_64_sync+0x1a0/0x1a4 [ 74.378586][ T4733] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.380345][ T4733] CPU: 0 PID: 4733 Comm: syz.0.38 Not tainted syzkaller #0 [ 74.381388][ T4733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.382967][ T4733] Call trace: [ 74.383465][ T4733] dump_backtrace+0x0/0x458 [ 74.384213][ T4733] show_stack+0x2c/0x3c [ 74.384883][ T4733] __dump_stack+0x30/0x40 [ 74.385600][ T4733] dump_stack_lvl+0xf4/0x15c [ 74.386316][ T4733] dump_stack+0x1c/0x5c [ 74.386977][ T4733] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.387793][ T4733] dccp_xmit_packet+0x298/0x460 [ 74.388647][ T4733] dccp_write_xmit+0x118/0x1d0 [ 74.389482][ T4733] dccp_sendmsg+0x510/0x850 [ 74.390220][ T4733] inet_sendmsg+0x154/0x27c [ 74.390924][ T4733] __sys_sendto+0x30c/0x420 [ 74.391650][ T4733] __arm64_sys_sendto+0xe4/0x104 [ 74.392439][ T4733] invoke_syscall+0x98/0x28c [ 74.393163][ T4733] el0_svc_common+0x13c/0x258 [ 74.393909][ T4733] do_el0_svc+0x5c/0x140 [ 74.394665][ T4733] el0_svc+0x78/0x1d0 [ 74.395343][ T4733] el0t_64_sync_handler+0xcc/0xe4 [ 74.396165][ T4733] el0t_64_sync+0x1a0/0x1a4 [ 74.397602][ T4733] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.399494][ T4733] CPU: 0 PID: 4733 Comm: syz.0.38 Not tainted syzkaller #0 [ 74.400616][ T4733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.402091][ T4733] Call trace: [ 74.402599][ T4733] dump_backtrace+0x0/0x458 [ 74.403249][ T4733] show_stack+0x2c/0x3c [ 74.403901][ T4733] __dump_stack+0x30/0x40 [ 74.404592][ T4733] dump_stack_lvl+0xf4/0x15c [ 74.405312][ T4733] dump_stack+0x1c/0x5c [ 74.405925][ T4733] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.406750][ T4733] dccp_xmit_packet+0x298/0x460 [ 74.407427][ T4733] dccp_write_xmit+0x118/0x1d0 [ 74.408159][ T4733] dccp_sendmsg+0x510/0x850 [ 74.408954][ T4733] inet_sendmsg+0x154/0x27c [ 74.409728][ T4733] __sys_sendto+0x30c/0x420 [ 74.410607][ T4733] __arm64_sys_sendto+0xe4/0x104 [ 74.411586][ T4733] invoke_syscall+0x98/0x28c [ 74.412416][ T4733] el0_svc_common+0x13c/0x258 [ 74.413239][ T4733] do_el0_svc+0x5c/0x140 [ 74.413970][ T4733] el0_svc+0x78/0x1d0 [ 74.414591][ T4733] el0t_64_sync_handler+0xcc/0xe4 [ 74.415425][ T4733] el0t_64_sync+0x1a0/0x1a4 [ 74.448058][ T4737] dccp_xmit_packet: Payload too large (65475) for featneg. [ 74.455855][ T4737] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.457857][ T4737] CPU: 1 PID: 4737 Comm: syz.0.39 Not tainted syzkaller #0 [ 74.459301][ T4737] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.461349][ T4737] Call trace: [ 74.461977][ T4737] dump_backtrace+0x0/0x458 [ 74.462813][ T4737] show_stack+0x2c/0x3c [ 74.463513][ T4737] __dump_stack+0x30/0x40 [ 74.464235][ T4737] dump_stack_lvl+0xf4/0x15c [ 74.465046][ T4737] dump_stack+0x1c/0x5c [ 74.465757][ T4737] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.466683][ T4737] dccp_xmit_packet+0x298/0x460 [ 74.467483][ T4737] dccp_write_xmit+0x118/0x1d0 [ 74.468290][ T4737] dccp_sendmsg+0x510/0x850 [ 74.469007][ T4737] inet_sendmsg+0x154/0x27c [ 74.469818][ T4737] __sys_sendto+0x30c/0x420 [ 74.470605][ T4737] __arm64_sys_sendto+0xe4/0x104 [ 74.471396][ T4737] invoke_syscall+0x98/0x28c [ 74.472112][ T4737] el0_svc_common+0x13c/0x258 [ 74.472897][ T4737] do_el0_svc+0x5c/0x140 [ 74.473594][ T4737] el0_svc+0x78/0x1d0 [ 74.474257][ T4737] el0t_64_sync_handler+0xcc/0xe4 [ 74.475066][ T4737] el0t_64_sync+0x1a0/0x1a4 [ 74.478840][ T4737] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.480627][ T4737] CPU: 1 PID: 4737 Comm: syz.0.39 Not tainted syzkaller #0 [ 74.481708][ T4737] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.483343][ T4737] Call trace: [ 74.483910][ T4737] dump_backtrace+0x0/0x458 [ 74.484639][ T4737] show_stack+0x2c/0x3c [ 74.485292][ T4737] __dump_stack+0x30/0x40 [ 74.485918][ T4737] dump_stack_lvl+0xf4/0x15c [ 74.486602][ T4737] dump_stack+0x1c/0x5c [ 74.487227][ T4737] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.488059][ T4737] dccp_xmit_packet+0x298/0x460 [ 74.488899][ T4737] dccp_write_xmit+0x118/0x1d0 [ 74.489651][ T4737] dccp_sendmsg+0x510/0x850 [ 74.490324][ T4737] inet_sendmsg+0x154/0x27c [ 74.491061][ T4737] __sys_sendto+0x30c/0x420 [ 74.491718][ T4737] __arm64_sys_sendto+0xe4/0x104 [ 74.492577][ T4737] invoke_syscall+0x98/0x28c [ 74.493300][ T4737] el0_svc_common+0x13c/0x258 [ 74.494039][ T4737] do_el0_svc+0x5c/0x140 [ 74.494723][ T4737] el0_svc+0x78/0x1d0 [ 74.495337][ T4737] el0t_64_sync_handler+0xcc/0xe4 [ 74.496109][ T4737] el0t_64_sync+0x1a0/0x1a4 [ 74.497778][ T4737] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.499799][ T4737] CPU: 1 PID: 4737 Comm: syz.0.39 Not tainted syzkaller #0 [ 74.500926][ T4737] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.502560][ T4737] Call trace: [ 74.503110][ T4737] dump_backtrace+0x0/0x458 [ 74.503835][ T4737] show_stack+0x2c/0x3c [ 74.504521][ T4737] __dump_stack+0x30/0x40 [ 74.505310][ T4737] dump_stack_lvl+0xf4/0x15c [ 74.506131][ T4737] dump_stack+0x1c/0x5c [ 74.506806][ T4737] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.507736][ T4737] dccp_xmit_packet+0x298/0x460 [ 74.508543][ T4737] dccp_write_xmit+0x118/0x1d0 [ 74.509332][ T4737] dccp_sendmsg+0x510/0x850 [ 74.510043][ T4737] inet_sendmsg+0x154/0x27c [ 74.510736][ T4737] __sys_sendto+0x30c/0x420 [ 74.511431][ T4737] __arm64_sys_sendto+0xe4/0x104 [ 74.512310][ T4737] invoke_syscall+0x98/0x28c [ 74.513121][ T4737] el0_svc_common+0x13c/0x258 [ 74.513923][ T4737] do_el0_svc+0x5c/0x140 [ 74.514645][ T4737] el0_svc+0x78/0x1d0 [ 74.515337][ T4737] el0t_64_sync_handler+0xcc/0xe4 [ 74.516144][ T4737] el0t_64_sync+0x1a0/0x1a4 [ 74.517806][ T4737] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.522672][ T4737] CPU: 1 PID: 4737 Comm: syz.0.39 Not tainted syzkaller #0 [ 74.523881][ T4737] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.525696][ T4737] Call trace: [ 74.526333][ T4737] dump_backtrace+0x0/0x458 [ 74.527198][ T4737] show_stack+0x2c/0x3c [ 74.527995][ T4737] __dump_stack+0x30/0x40 [ 74.528738][ T4737] dump_stack_lvl+0xf4/0x15c [ 74.529474][ T4737] dump_stack+0x1c/0x5c [ 74.530175][ T4737] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.531171][ T4737] dccp_xmit_packet+0x298/0x460 [ 74.532112][ T4737] dccp_write_xmit+0x118/0x1d0 [ 74.532977][ T4737] dccp_sendmsg+0x510/0x850 [ 74.533794][ T4737] inet_sendmsg+0x154/0x27c [ 74.534661][ T4737] __sys_sendto+0x30c/0x420 [ 74.535428][ T4737] __arm64_sys_sendto+0xe4/0x104 [ 74.536219][ T4737] invoke_syscall+0x98/0x28c [ 74.536990][ T4737] el0_svc_common+0x13c/0x258 [ 74.537731][ T4737] do_el0_svc+0x5c/0x140 [ 74.538382][ T4737] el0_svc+0x78/0x1d0 [ 74.539047][ T4737] el0t_64_sync_handler+0xcc/0xe4 [ 74.539883][ T4737] el0t_64_sync+0x1a0/0x1a4 [ 74.541999][ T4737] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.543905][ T4737] CPU: 1 PID: 4737 Comm: syz.0.39 Not tainted syzkaller #0 [ 74.545098][ T4737] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.546958][ T4737] Call trace: [ 74.547537][ T4737] dump_backtrace+0x0/0x458 [ 74.548339][ T4737] show_stack+0x2c/0x3c [ 74.549096][ T4737] __dump_stack+0x30/0x40 [ 74.549898][ T4737] dump_stack_lvl+0xf4/0x15c [ 74.550673][ T4737] dump_stack+0x1c/0x5c [ 74.551364][ T4737] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.552407][ T4737] dccp_xmit_packet+0x298/0x460 [ 74.553306][ T4737] dccp_write_xmit+0x118/0x1d0 [ 74.554160][ T4737] dccp_sendmsg+0x510/0x850 [ 74.554939][ T4737] inet_sendmsg+0x154/0x27c [ 74.555652][ T4737] __sys_sendto+0x30c/0x420 [ 74.556405][ T4737] __arm64_sys_sendto+0xe4/0x104 [ 74.557505][ T4737] invoke_syscall+0x98/0x28c [ 74.558269][ T4737] el0_svc_common+0x13c/0x258 [ 74.559133][ T4737] do_el0_svc+0x5c/0x140 [ 74.559931][ T4737] el0_svc+0x78/0x1d0 [ 74.560638][ T4737] el0t_64_sync_handler+0xcc/0xe4 [ 74.561414][ T4737] el0t_64_sync+0x1a0/0x1a4 [ 74.563206][ T4737] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.565164][ T4737] CPU: 1 PID: 4737 Comm: syz.0.39 Not tainted syzkaller #0 [ 74.566379][ T4737] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.568102][ T4737] Call trace: [ 74.568654][ T4737] dump_backtrace+0x0/0x458 [ 74.569380][ T4737] show_stack+0x2c/0x3c [ 74.570017][ T4737] __dump_stack+0x30/0x40 [ 74.570645][ T4737] dump_stack_lvl+0xf4/0x15c [ 74.571554][ T4737] dump_stack+0x1c/0x5c [ 74.572320][ T4737] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.573325][ T4737] dccp_xmit_packet+0x298/0x460 [ 74.574225][ T4737] dccp_write_xmit+0x118/0x1d0 [ 74.575006][ T4737] dccp_sendmsg+0x510/0x850 [ 74.575717][ T4737] inet_sendmsg+0x154/0x27c [ 74.576368][ T4737] __sys_sendto+0x30c/0x420 [ 74.577040][ T4737] __arm64_sys_sendto+0xe4/0x104 [ 74.577790][ T4737] invoke_syscall+0x98/0x28c [ 74.578557][ T4737] el0_svc_common+0x13c/0x258 [ 74.579402][ T4737] do_el0_svc+0x5c/0x140 [ 74.580109][ T4737] el0_svc+0x78/0x1d0 [ 74.580790][ T4737] el0t_64_sync_handler+0xcc/0xe4 [ 74.581663][ T4737] el0t_64_sync+0x1a0/0x1a4 [ 74.583572][ T4737] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.585500][ T4737] CPU: 1 PID: 4737 Comm: syz.0.39 Not tainted syzkaller #0 [ 74.586644][ T4737] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.588223][ T4737] Call trace: [ 74.588761][ T4737] dump_backtrace+0x0/0x458 [ 74.589540][ T4737] show_stack+0x2c/0x3c [ 74.590205][ T4737] __dump_stack+0x30/0x40 [ 74.590884][ T4737] dump_stack_lvl+0xf4/0x15c [ 74.591567][ T4737] dump_stack+0x1c/0x5c [ 74.592291][ T4737] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.593199][ T4737] dccp_xmit_packet+0x298/0x460 [ 74.593957][ T4737] dccp_write_xmit+0x118/0x1d0 [ 74.594753][ T4737] dccp_sendmsg+0x510/0x850 [ 74.595555][ T4737] inet_sendmsg+0x154/0x27c [ 74.596288][ T4737] __sys_sendto+0x30c/0x420 [ 74.596995][ T4737] __arm64_sys_sendto+0xe4/0x104 [ 74.597912][ T4737] invoke_syscall+0x98/0x28c [ 74.598824][ T4737] el0_svc_common+0x13c/0x258 [ 74.599751][ T4737] do_el0_svc+0x5c/0x140 [ 74.600531][ T4737] el0_svc+0x78/0x1d0 [ 74.601239][ T4737] el0t_64_sync_handler+0xcc/0xe4 [ 74.601993][ T4737] el0t_64_sync+0x1a0/0x1a4 [ 74.603668][ T4737] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.605568][ T4737] CPU: 1 PID: 4737 Comm: syz.0.39 Not tainted syzkaller #0 [ 74.606617][ T4737] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.608162][ T4737] Call trace: [ 74.608780][ T4737] dump_backtrace+0x0/0x458 [ 74.609633][ T4737] show_stack+0x2c/0x3c [ 74.610396][ T4737] __dump_stack+0x30/0x40 [ 74.611103][ T4737] dump_stack_lvl+0xf4/0x15c [ 74.611802][ T4737] dump_stack+0x1c/0x5c [ 74.612417][ T4737] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.613282][ T4737] dccp_xmit_packet+0x298/0x460 [ 74.614002][ T4737] dccp_write_xmit+0x118/0x1d0 [ 74.614721][ T4737] dccp_sendmsg+0x510/0x850 [ 74.615505][ T4737] inet_sendmsg+0x154/0x27c [ 74.616305][ T4737] __sys_sendto+0x30c/0x420 [ 74.617125][ T4737] __arm64_sys_sendto+0xe4/0x104 [ 74.617928][ T4737] invoke_syscall+0x98/0x28c [ 74.618805][ T4737] el0_svc_common+0x13c/0x258 [ 74.619653][ T4737] do_el0_svc+0x5c/0x140 [ 74.620292][ T4737] el0_svc+0x78/0x1d0 [ 74.620919][ T4737] el0t_64_sync_handler+0xcc/0xe4 [ 74.621694][ T4737] el0t_64_sync+0x1a0/0x1a4 [ 74.623324][ T4737] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.625407][ T4737] CPU: 1 PID: 4737 Comm: syz.0.39 Not tainted syzkaller #0 [ 74.626535][ T4737] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.628145][ T4737] Call trace: [ 74.628667][ T4737] dump_backtrace+0x0/0x458 [ 74.629344][ T4737] show_stack+0x2c/0x3c [ 74.629975][ T4737] __dump_stack+0x30/0x40 [ 74.630647][ T4737] dump_stack_lvl+0xf4/0x15c [ 74.631359][ T4737] dump_stack+0x1c/0x5c [ 74.631967][ T4737] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.632951][ T4737] dccp_xmit_packet+0x298/0x460 [ 74.633794][ T4737] dccp_write_xmit+0x118/0x1d0 [ 74.634566][ T4737] dccp_sendmsg+0x510/0x850 [ 74.635207][ T4737] inet_sendmsg+0x154/0x27c [ 74.635888][ T4737] __sys_sendto+0x30c/0x420 [ 74.636602][ T4737] __arm64_sys_sendto+0xe4/0x104 [ 74.637301][ T4737] invoke_syscall+0x98/0x28c [ 74.637965][ T4737] el0_svc_common+0x13c/0x258 [ 74.638744][ T4737] do_el0_svc+0x5c/0x140 [ 74.639478][ T4737] el0_svc+0x78/0x1d0 [ 74.640182][ T4737] el0t_64_sync_handler+0xcc/0xe4 [ 74.641021][ T4737] el0t_64_sync+0x1a0/0x1a4 [ 74.642725][ T4737] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.644550][ T4737] CPU: 1 PID: 4737 Comm: syz.0.39 Not tainted syzkaller #0 [ 74.645800][ T4737] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.647641][ T4737] Call trace: [ 74.648254][ T4737] dump_backtrace+0x0/0x458 [ 74.649100][ T4737] show_stack+0x2c/0x3c [ 74.649889][ T4737] __dump_stack+0x30/0x40 [ 74.650619][ T4737] dump_stack_lvl+0xf4/0x15c [ 74.651445][ T4737] dump_stack+0x1c/0x5c [ 74.652226][ T4737] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.653105][ T4737] dccp_xmit_packet+0x298/0x460 [ 74.653925][ T4737] dccp_write_xmit+0x118/0x1d0 [ 74.654675][ T4737] dccp_sendmsg+0x510/0x850 [ 74.655410][ T4737] inet_sendmsg+0x154/0x27c [ 74.656083][ T4737] __sys_sendto+0x30c/0x420 [ 74.656832][ T4737] __arm64_sys_sendto+0xe4/0x104 [ 74.657614][ T4737] invoke_syscall+0x98/0x28c [ 74.658408][ T4737] el0_svc_common+0x13c/0x258 [ 74.659191][ T4737] do_el0_svc+0x5c/0x140 [ 74.659978][ T4737] el0_svc+0x78/0x1d0 [ 74.660642][ T4737] el0t_64_sync_handler+0xcc/0xe4 [ 74.661505][ T4737] el0t_64_sync+0x1a0/0x1a4 [ 74.663283][ T4737] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.665268][ T4737] CPU: 1 PID: 4737 Comm: syz.0.39 Not tainted syzkaller #0 [ 74.666410][ T4737] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.668153][ T4737] Call trace: [ 74.668708][ T4737] dump_backtrace+0x0/0x458 [ 74.669471][ T4737] show_stack+0x2c/0x3c [ 74.670223][ T4737] __dump_stack+0x30/0x40 [ 74.670918][ T4737] dump_stack_lvl+0xf4/0x15c [ 74.671641][ T4737] dump_stack+0x1c/0x5c [ 74.672375][ T4737] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.673285][ T4737] dccp_xmit_packet+0x298/0x460 [ 74.674077][ T4737] dccp_write_xmit+0x118/0x1d0 [ 74.674823][ T4737] dccp_sendmsg+0x510/0x850 [ 74.675623][ T4737] inet_sendmsg+0x154/0x27c [ 74.676402][ T4737] __sys_sendto+0x30c/0x420 [ 74.677232][ T4737] __arm64_sys_sendto+0xe4/0x104 [ 74.678104][ T4737] invoke_syscall+0x98/0x28c [ 74.678877][ T4737] el0_svc_common+0x13c/0x258 [ 74.679589][ T4737] do_el0_svc+0x5c/0x140 [ 74.680302][ T4737] el0_svc+0x78/0x1d0 [ 74.680964][ T4737] el0t_64_sync_handler+0xcc/0xe4 [ 74.681871][ T4737] el0t_64_sync+0x1a0/0x1a4 [ 74.683115][ T4737] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.685065][ T4737] CPU: 1 PID: 4737 Comm: syz.0.39 Not tainted syzkaller #0 [ 74.686242][ T4737] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.688020][ T4737] Call trace: [ 74.688636][ T4737] dump_backtrace+0x0/0x458 [ 74.689492][ T4737] show_stack+0x2c/0x3c [ 74.690282][ T4737] __dump_stack+0x30/0x40 [ 74.690991][ T4737] dump_stack_lvl+0xf4/0x15c [ 74.691824][ T4737] dump_stack+0x1c/0x5c [ 74.692487][ T4737] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.693372][ T4737] dccp_xmit_packet+0x298/0x460 [ 74.694175][ T4737] dccp_write_xmit+0x118/0x1d0 [ 74.694928][ T4737] dccp_sendmsg+0x510/0x850 [ 74.695778][ T4737] inet_sendmsg+0x154/0x27c [ 74.696648][ T4737] __sys_sendto+0x30c/0x420 [ 74.697456][ T4737] __arm64_sys_sendto+0xe4/0x104 [ 74.698224][ T4737] invoke_syscall+0x98/0x28c [ 74.699026][ T4737] el0_svc_common+0x13c/0x258 [ 74.699781][ T4737] do_el0_svc+0x5c/0x140 [ 74.700540][ T4737] el0_svc+0x78/0x1d0 [ 74.701281][ T4737] el0t_64_sync_handler+0xcc/0xe4 [ 74.702137][ T4737] el0t_64_sync+0x1a0/0x1a4 [ 74.718351][ T4739] dccp_xmit_packet: Payload too large (65475) for featneg. [ 74.725455][ T4739] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.727189][ T4739] CPU: 0 PID: 4739 Comm: syz.0.40 Not tainted syzkaller #0 [ 74.728300][ T4739] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.729889][ T4739] Call trace: [ 74.730368][ T4739] dump_backtrace+0x0/0x458 [ 74.731050][ T4739] show_stack+0x2c/0x3c [ 74.731706][ T4739] __dump_stack+0x30/0x40 [ 74.732424][ T4739] dump_stack_lvl+0xf4/0x15c [ 74.733196][ T4739] dump_stack+0x1c/0x5c [ 74.733834][ T4739] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.734720][ T4739] dccp_xmit_packet+0x298/0x460 [ 74.735481][ T4739] dccp_write_xmit+0x118/0x1d0 [ 74.736236][ T4739] dccp_sendmsg+0x510/0x850 [ 74.736998][ T4739] inet_sendmsg+0x154/0x27c [ 74.737674][ T4739] __sys_sendto+0x30c/0x420 [ 74.738384][ T4739] __arm64_sys_sendto+0xe4/0x104 [ 74.739232][ T4739] invoke_syscall+0x98/0x28c [ 74.739951][ T4739] el0_svc_common+0x13c/0x258 [ 74.740751][ T4739] do_el0_svc+0x5c/0x140 [ 74.741443][ T4739] el0_svc+0x78/0x1d0 [ 74.742077][ T4739] el0t_64_sync_handler+0xcc/0xe4 [ 74.742893][ T4739] el0t_64_sync+0x1a0/0x1a4 [ 74.744008][ T4739] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.745745][ T4739] CPU: 0 PID: 4739 Comm: syz.0.40 Not tainted syzkaller #0 [ 74.746818][ T4739] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.748330][ T4739] Call trace: [ 74.748874][ T4739] dump_backtrace+0x0/0x458 [ 74.749739][ T4739] show_stack+0x2c/0x3c [ 74.750451][ T4739] __dump_stack+0x30/0x40 [ 74.751132][ T4739] dump_stack_lvl+0xf4/0x15c [ 74.751864][ T4739] dump_stack+0x1c/0x5c [ 74.752557][ T4739] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.753413][ T4739] dccp_xmit_packet+0x298/0x460 [ 74.754142][ T4739] dccp_write_xmit+0x118/0x1d0 [ 74.754933][ T4739] dccp_sendmsg+0x510/0x850 [ 74.755735][ T4739] inet_sendmsg+0x154/0x27c [ 74.756565][ T4739] __sys_sendto+0x30c/0x420 [ 74.757306][ T4739] __arm64_sys_sendto+0xe4/0x104 [ 74.758073][ T4739] invoke_syscall+0x98/0x28c [ 74.758879][ T4739] el0_svc_common+0x13c/0x258 [ 74.759659][ T4739] do_el0_svc+0x5c/0x140 [ 74.760363][ T4739] el0_svc+0x78/0x1d0 [ 74.761013][ T4739] el0t_64_sync_handler+0xcc/0xe4 [ 74.761845][ T4739] el0t_64_sync+0x1a0/0x1a4 [ 74.762734][ T4739] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.764416][ T4739] CPU: 0 PID: 4739 Comm: syz.0.40 Not tainted syzkaller #0 [ 74.765522][ T4739] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.767069][ T4739] Call trace: [ 74.767522][ T4739] dump_backtrace+0x0/0x458 [ 74.768190][ T4739] show_stack+0x2c/0x3c [ 74.768846][ T4739] __dump_stack+0x30/0x40 [ 74.769554][ T4739] dump_stack_lvl+0xf4/0x15c [ 74.770318][ T4739] dump_stack+0x1c/0x5c [ 74.771017][ T4739] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.771875][ T4739] dccp_xmit_packet+0x298/0x460 [ 74.772677][ T4739] dccp_write_xmit+0x118/0x1d0 [ 74.773454][ T4739] dccp_sendmsg+0x510/0x850 [ 74.774199][ T4739] inet_sendmsg+0x154/0x27c [ 74.774897][ T4739] __sys_sendto+0x30c/0x420 [ 74.775592][ T4739] __arm64_sys_sendto+0xe4/0x104 [ 74.776332][ T4739] invoke_syscall+0x98/0x28c [ 74.777132][ T4739] el0_svc_common+0x13c/0x258 [ 74.777876][ T4739] do_el0_svc+0x5c/0x140 [ 74.778502][ T4739] el0_svc+0x78/0x1d0 [ 74.779132][ T4739] el0t_64_sync_handler+0xcc/0xe4 [ 74.780001][ T4739] el0t_64_sync+0x1a0/0x1a4 [ 74.782030][ T4739] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.784030][ T4739] CPU: 1 PID: 4739 Comm: syz.0.40 Not tainted syzkaller #0 [ 74.785222][ T4739] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.786998][ T4739] Call trace: [ 74.787572][ T4739] dump_backtrace+0x0/0x458 [ 74.788382][ T4739] show_stack+0x2c/0x3c [ 74.789086][ T4739] __dump_stack+0x30/0x40 [ 74.789779][ T4739] dump_stack_lvl+0xf4/0x15c [ 74.790593][ T4739] dump_stack+0x1c/0x5c [ 74.791317][ T4739] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.792215][ T4739] dccp_xmit_packet+0x298/0x460 [ 74.792953][ T4739] dccp_write_xmit+0x118/0x1d0 [ 74.793742][ T4739] dccp_sendmsg+0x510/0x850 [ 74.794524][ T4739] inet_sendmsg+0x154/0x27c [ 74.795289][ T4739] __sys_sendto+0x30c/0x420 [ 74.796046][ T4739] __arm64_sys_sendto+0xe4/0x104 [ 74.796926][ T4739] invoke_syscall+0x98/0x28c [ 74.797773][ T4739] el0_svc_common+0x13c/0x258 [ 74.798586][ T4739] do_el0_svc+0x5c/0x140 [ 74.799308][ T4739] el0_svc+0x78/0x1d0 [ 74.800018][ T4739] el0t_64_sync_handler+0xcc/0xe4 [ 74.800891][ T4739] el0t_64_sync+0x1a0/0x1a4 [ 74.803864][ T4739] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.805697][ T4739] CPU: 1 PID: 4739 Comm: syz.0.40 Not tainted syzkaller #0 [ 74.806847][ T4739] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.808450][ T4739] Call trace: [ 74.809020][ T4739] dump_backtrace+0x0/0x458 [ 74.809736][ T4739] show_stack+0x2c/0x3c [ 74.810488][ T4739] __dump_stack+0x30/0x40 [ 74.811211][ T4739] dump_stack_lvl+0xf4/0x15c [ 74.811926][ T4739] dump_stack+0x1c/0x5c [ 74.812561][ T4739] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.813495][ T4739] dccp_xmit_packet+0x298/0x460 [ 74.814254][ T4739] dccp_write_xmit+0x118/0x1d0 [ 74.815019][ T4739] dccp_sendmsg+0x510/0x850 [ 74.815889][ T4739] inet_sendmsg+0x154/0x27c [ 74.816681][ T4739] __sys_sendto+0x30c/0x420 [ 74.817485][ T4739] __arm64_sys_sendto+0xe4/0x104 [ 74.818363][ T4739] invoke_syscall+0x98/0x28c [ 74.819140][ T4739] el0_svc_common+0x13c/0x258 [ 74.819877][ T4739] do_el0_svc+0x5c/0x140 [ 74.820530][ T4739] el0_svc+0x78/0x1d0 [ 74.821199][ T4739] el0t_64_sync_handler+0xcc/0xe4 [ 74.822033][ T4739] el0t_64_sync+0x1a0/0x1a4 [ 74.823623][ T4739] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.825489][ T4739] CPU: 1 PID: 4739 Comm: syz.0.40 Not tainted syzkaller #0 [ 74.826623][ T4739] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.828301][ T4739] Call trace: [ 74.828866][ T4739] dump_backtrace+0x0/0x458 [ 74.829632][ T4739] show_stack+0x2c/0x3c [ 74.830307][ T4739] __dump_stack+0x30/0x40 [ 74.830976][ T4739] dump_stack_lvl+0xf4/0x15c [ 74.831730][ T4739] dump_stack+0x1c/0x5c [ 74.832392][ T4739] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.833318][ T4739] dccp_xmit_packet+0x298/0x460 [ 74.834143][ T4739] dccp_write_xmit+0x118/0x1d0 [ 74.834978][ T4739] dccp_sendmsg+0x510/0x850 [ 74.835752][ T4739] inet_sendmsg+0x154/0x27c [ 74.836541][ T4739] __sys_sendto+0x30c/0x420 [ 74.837296][ T4739] __arm64_sys_sendto+0xe4/0x104 [ 74.838225][ T4739] invoke_syscall+0x98/0x28c [ 74.839075][ T4739] el0_svc_common+0x13c/0x258 [ 74.839895][ T4739] do_el0_svc+0x5c/0x140 [ 74.840722][ T4739] el0_svc+0x78/0x1d0 [ 74.841479][ T4739] el0t_64_sync_handler+0xcc/0xe4 [ 74.842384][ T4739] el0t_64_sync+0x1a0/0x1a4 [ 74.844143][ T4739] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.845832][ T4739] CPU: 1 PID: 4739 Comm: syz.0.40 Not tainted syzkaller #0 [ 74.846853][ T4739] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.848389][ T4739] Call trace: [ 74.848912][ T4739] dump_backtrace+0x0/0x458 [ 74.849642][ T4739] show_stack+0x2c/0x3c [ 74.850313][ T4739] __dump_stack+0x30/0x40 [ 74.851050][ T4739] dump_stack_lvl+0xf4/0x15c [ 74.851844][ T4739] dump_stack+0x1c/0x5c [ 74.852661][ T4739] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.853621][ T4739] dccp_xmit_packet+0x298/0x460 [ 74.854416][ T4739] dccp_write_xmit+0x118/0x1d0 [ 74.855242][ T4739] dccp_sendmsg+0x510/0x850 [ 74.856153][ T4739] inet_sendmsg+0x154/0x27c [ 74.857036][ T4739] __sys_sendto+0x30c/0x420 [ 74.857948][ T4739] __arm64_sys_sendto+0xe4/0x104 [ 74.858854][ T4739] invoke_syscall+0x98/0x28c [ 74.859633][ T4739] el0_svc_common+0x13c/0x258 [ 74.860439][ T4739] do_el0_svc+0x5c/0x140 [ 74.861242][ T4739] el0_svc+0x78/0x1d0 [ 74.861911][ T4739] el0t_64_sync_handler+0xcc/0xe4 [ 74.862883][ T4739] el0t_64_sync+0x1a0/0x1a4 [ 74.864440][ T4739] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.866267][ T4739] CPU: 1 PID: 4739 Comm: syz.0.40 Not tainted syzkaller #0 [ 74.867377][ T4739] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.869138][ T4739] Call trace: [ 74.869735][ T4739] dump_backtrace+0x0/0x458 [ 74.870516][ T4739] show_stack+0x2c/0x3c [ 74.871202][ T4739] __dump_stack+0x30/0x40 [ 74.871932][ T4739] dump_stack_lvl+0xf4/0x15c [ 74.872712][ T4739] dump_stack+0x1c/0x5c [ 74.873458][ T4739] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.874423][ T4739] dccp_xmit_packet+0x298/0x460 [ 74.875269][ T4739] dccp_write_xmit+0x118/0x1d0 [ 74.876077][ T4739] dccp_sendmsg+0x510/0x850 [ 74.876872][ T4739] inet_sendmsg+0x154/0x27c [ 74.877726][ T4739] __sys_sendto+0x30c/0x420 [ 74.878581][ T4739] __arm64_sys_sendto+0xe4/0x104 [ 74.879469][ T4739] invoke_syscall+0x98/0x28c [ 74.880283][ T4739] el0_svc_common+0x13c/0x258 [ 74.881113][ T4739] do_el0_svc+0x5c/0x140 [ 74.881854][ T4739] el0_svc+0x78/0x1d0 [ 74.882530][ T4739] el0t_64_sync_handler+0xcc/0xe4 [ 74.883397][ T4739] el0t_64_sync+0x1a0/0x1a4 [ 74.885262][ T4739] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.886995][ T4739] CPU: 1 PID: 4739 Comm: syz.0.40 Not tainted syzkaller #0 [ 74.888059][ T4739] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.889839][ T4739] Call trace: [ 74.890398][ T4739] dump_backtrace+0x0/0x458 [ 74.891178][ T4739] show_stack+0x2c/0x3c [ 74.891853][ T4739] __dump_stack+0x30/0x40 [ 74.892534][ T4739] dump_stack_lvl+0xf4/0x15c [ 74.893249][ T4739] dump_stack+0x1c/0x5c [ 74.893920][ T4739] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.894849][ T4739] dccp_xmit_packet+0x298/0x460 [ 74.895639][ T4739] dccp_write_xmit+0x118/0x1d0 [ 74.896448][ T4739] dccp_sendmsg+0x510/0x850 [ 74.897187][ T4739] inet_sendmsg+0x154/0x27c [ 74.897889][ T4739] __sys_sendto+0x30c/0x420 [ 74.898649][ T4739] __arm64_sys_sendto+0xe4/0x104 [ 74.899555][ T4739] invoke_syscall+0x98/0x28c [ 74.900321][ T4739] el0_svc_common+0x13c/0x258 [ 74.901085][ T4739] do_el0_svc+0x5c/0x140 [ 74.901815][ T4739] el0_svc+0x78/0x1d0 [ 74.902479][ T4739] el0t_64_sync_handler+0xcc/0xe4 [ 74.903359][ T4739] el0t_64_sync+0x1a0/0x1a4 [ 74.905244][ T4739] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.910874][ T4739] CPU: 1 PID: 4739 Comm: syz.0.40 Not tainted syzkaller #0 [ 74.911942][ T4739] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.913465][ T4739] Call trace: [ 74.913951][ T4739] dump_backtrace+0x0/0x458 [ 74.914728][ T4739] show_stack+0x2c/0x3c [ 74.915499][ T4739] __dump_stack+0x30/0x40 [ 74.916234][ T4739] dump_stack_lvl+0xf4/0x15c [ 74.917084][ T4739] dump_stack+0x1c/0x5c [ 74.917793][ T4739] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.918740][ T4739] dccp_xmit_packet+0x298/0x460 [ 74.919578][ T4739] dccp_write_xmit+0x118/0x1d0 [ 74.920353][ T4739] dccp_sendmsg+0x510/0x850 [ 74.921102][ T4739] inet_sendmsg+0x154/0x27c [ 74.921867][ T4739] __sys_sendto+0x30c/0x420 [ 74.922736][ T4739] __arm64_sys_sendto+0xe4/0x104 [ 74.923697][ T4739] invoke_syscall+0x98/0x28c [ 74.924506][ T4739] el0_svc_common+0x13c/0x258 [ 74.925301][ T4739] do_el0_svc+0x5c/0x140 [ 74.926089][ T4739] el0_svc+0x78/0x1d0 [ 74.926964][ T4739] el0t_64_sync_handler+0xcc/0xe4 [ 74.927855][ T4739] el0t_64_sync+0x1a0/0x1a4 [ 74.930486][ T4739] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.932236][ T4739] CPU: 1 PID: 4739 Comm: syz.0.40 Not tainted syzkaller #0 [ 74.933307][ T4739] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.935012][ T4739] Call trace: [ 74.935561][ T4739] dump_backtrace+0x0/0x458 [ 74.936259][ T4739] show_stack+0x2c/0x3c [ 74.937032][ T4739] __dump_stack+0x30/0x40 [ 74.937732][ T4739] dump_stack_lvl+0xf4/0x15c [ 74.938546][ T4739] dump_stack+0x1c/0x5c [ 74.939289][ T4739] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.940187][ T4739] dccp_xmit_packet+0x298/0x460 [ 74.940961][ T4739] dccp_write_xmit+0x118/0x1d0 [ 74.941786][ T4739] dccp_sendmsg+0x510/0x850 [ 74.942586][ T4739] inet_sendmsg+0x154/0x27c [ 74.943376][ T4739] __sys_sendto+0x30c/0x420 [ 74.944153][ T4739] __arm64_sys_sendto+0xe4/0x104 [ 74.944972][ T4739] invoke_syscall+0x98/0x28c [ 74.945903][ T4739] el0_svc_common+0x13c/0x258 [ 74.946770][ T4739] do_el0_svc+0x5c/0x140 [ 74.947580][ T4739] el0_svc+0x78/0x1d0 [ 74.948305][ T4739] el0t_64_sync_handler+0xcc/0xe4 [ 74.949230][ T4739] el0t_64_sync+0x1a0/0x1a4 [ 74.951929][ T4739] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.953666][ T4739] CPU: 1 PID: 4739 Comm: syz.0.40 Not tainted syzkaller #0 [ 74.954773][ T4739] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.956274][ T4739] Call trace: [ 74.956800][ T4739] dump_backtrace+0x0/0x458 [ 74.957478][ T4739] show_stack+0x2c/0x3c [ 74.958044][ T4739] __dump_stack+0x30/0x40 [ 74.958695][ T4739] dump_stack_lvl+0xf4/0x15c [ 74.959572][ T4739] dump_stack+0x1c/0x5c [ 74.960277][ T4739] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.961325][ T4739] dccp_xmit_packet+0x298/0x460 [ 74.962210][ T4739] dccp_write_xmit+0x118/0x1d0 [ 74.963081][ T4739] dccp_sendmsg+0x510/0x850 [ 74.963898][ T4739] inet_sendmsg+0x154/0x27c [ 74.964713][ T4739] __sys_sendto+0x30c/0x420 [ 74.965531][ T4739] __arm64_sys_sendto+0xe4/0x104 [ 74.966378][ T4739] invoke_syscall+0x98/0x28c [ 74.967238][ T4739] el0_svc_common+0x13c/0x258 [ 74.968125][ T4739] do_el0_svc+0x5c/0x140 [ 74.968909][ T4739] el0_svc+0x78/0x1d0 [ 74.969571][ T4739] el0t_64_sync_handler+0xcc/0xe4 [ 74.970452][ T4739] el0t_64_sync+0x1a0/0x1a4 [ 74.972661][ T4739] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.974317][ T4739] CPU: 1 PID: 4739 Comm: syz.0.40 Not tainted syzkaller #0 [ 74.975534][ T4739] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.977136][ T4739] Call trace: [ 74.977659][ T4739] dump_backtrace+0x0/0x458 [ 74.978404][ T4739] show_stack+0x2c/0x3c [ 74.979141][ T4739] __dump_stack+0x30/0x40 [ 74.979913][ T4739] dump_stack_lvl+0xf4/0x15c [ 74.980666][ T4739] dump_stack+0x1c/0x5c [ 74.981390][ T4739] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 74.982292][ T4739] dccp_xmit_packet+0x298/0x460 [ 74.983140][ T4739] dccp_write_xmit+0x118/0x1d0 [ 74.983881][ T4739] dccp_sendmsg+0x510/0x850 [ 74.984649][ T4739] inet_sendmsg+0x154/0x27c [ 74.985350][ T4739] __sys_sendto+0x30c/0x420 [ 74.986106][ T4739] __arm64_sys_sendto+0xe4/0x104 [ 74.986897][ T4739] invoke_syscall+0x98/0x28c [ 74.987607][ T4739] el0_svc_common+0x13c/0x258 [ 74.988368][ T4739] do_el0_svc+0x5c/0x140 [ 74.989079][ T4739] el0_svc+0x78/0x1d0 [ 74.989810][ T4739] el0t_64_sync_handler+0xcc/0xe4 [ 74.990705][ T4739] el0t_64_sync+0x1a0/0x1a4 [ 74.992618][ T4739] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 74.994332][ T4739] CPU: 1 PID: 4739 Comm: syz.0.40 Not tainted syzkaller #0 [ 74.995464][ T4739] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.996994][ T4739] Call trace: [ 74.997466][ T4739] dump_backtrace+0x0/0x458 [ 74.998208][ T4739] show_stack+0x2c/0x3c [ 74.998948][ T4739] __dump_stack+0x30/0x40 [ 74.999734][ T4739] dump_stack_lvl+0xf4/0x15c [ 75.000557][ T4739] dump_stack+0x1c/0x5c [ 75.001263][ T4739] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.002111][ T4739] dccp_xmit_packet+0x298/0x460 [ 75.002940][ T4739] dccp_write_xmit+0x118/0x1d0 [ 75.003742][ T4739] dccp_sendmsg+0x510/0x850 [ 75.004532][ T4739] inet_sendmsg+0x154/0x27c [ 75.005260][ T4739] __sys_sendto+0x30c/0x420 [ 75.006012][ T4739] __arm64_sys_sendto+0xe4/0x104 [ 75.006814][ T4739] invoke_syscall+0x98/0x28c [ 75.007592][ T4739] el0_svc_common+0x13c/0x258 [ 75.008357][ T4739] do_el0_svc+0x5c/0x140 [ 75.009024][ T4739] el0_svc+0x78/0x1d0 [ 75.009651][ T4739] el0t_64_sync_handler+0xcc/0xe4 [ 75.010457][ T4739] el0t_64_sync+0x1a0/0x1a4 [ 75.011967][ T4739] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.013664][ T4739] CPU: 1 PID: 4739 Comm: syz.0.40 Not tainted syzkaller #0 [ 75.014782][ T4739] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.016460][ T4739] Call trace: [ 75.016976][ T4739] dump_backtrace+0x0/0x458 [ 75.017657][ T4739] show_stack+0x2c/0x3c [ 75.018273][ T4739] __dump_stack+0x30/0x40 [ 75.018969][ T4739] dump_stack_lvl+0xf4/0x15c [ 75.019605][ T4739] dump_stack+0x1c/0x5c [ 75.020431][ T4739] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.021979][ T4739] dccp_xmit_packet+0x298/0x460 [ 75.022729][ T4739] dccp_write_xmit+0x118/0x1d0 [ 75.023462][ T4739] dccp_sendmsg+0x510/0x850 [ 75.024199][ T4739] inet_sendmsg+0x154/0x27c [ 75.025112][ T4739] __sys_sendto+0x30c/0x420 [ 75.025796][ T4739] __arm64_sys_sendto+0xe4/0x104 [ 75.026755][ T4739] invoke_syscall+0x98/0x28c [ 75.027621][ T4739] el0_svc_common+0x13c/0x258 [ 75.028352][ T4739] do_el0_svc+0x5c/0x140 [ 75.029030][ T4739] el0_svc+0x78/0x1d0 [ 75.029676][ T4739] el0t_64_sync_handler+0xcc/0xe4 [ 75.030459][ T4739] el0t_64_sync+0x1a0/0x1a4 [ 75.032140][ T4739] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.033830][ T4739] CPU: 1 PID: 4739 Comm: syz.0.40 Not tainted syzkaller #0 [ 75.034883][ T4739] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.036402][ T4739] Call trace: [ 75.036877][ T4739] dump_backtrace+0x0/0x458 [ 75.037596][ T4739] show_stack+0x2c/0x3c [ 75.038195][ T4739] __dump_stack+0x30/0x40 [ 75.038883][ T4739] dump_stack_lvl+0xf4/0x15c [ 75.039698][ T4739] dump_stack+0x1c/0x5c [ 75.040326][ T4739] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.041149][ T4739] dccp_xmit_packet+0x298/0x460 [ 75.041916][ T4739] dccp_write_xmit+0x118/0x1d0 [ 75.042668][ T4739] dccp_sendmsg+0x510/0x850 [ 75.043321][ T4739] inet_sendmsg+0x154/0x27c [ 75.044032][ T4739] __sys_sendto+0x30c/0x420 [ 75.044725][ T4739] __arm64_sys_sendto+0xe4/0x104 [ 75.045556][ T4739] invoke_syscall+0x98/0x28c [ 75.046296][ T4739] el0_svc_common+0x13c/0x258 [ 75.047010][ T4739] do_el0_svc+0x5c/0x140 [ 75.047655][ T4739] el0_svc+0x78/0x1d0 [ 75.048295][ T4739] el0t_64_sync_handler+0xcc/0xe4 [ 75.049118][ T4739] el0t_64_sync+0x1a0/0x1a4 [ 75.061470][ T4743] dccp_xmit_packet: Payload too large (65475) for featneg. [ 75.069069][ T4743] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.070823][ T4743] CPU: 0 PID: 4743 Comm: syz.0.41 Not tainted syzkaller #0 [ 75.071937][ T4743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.073515][ T4743] Call trace: [ 75.073985][ T4743] dump_backtrace+0x0/0x458 [ 75.074699][ T4743] show_stack+0x2c/0x3c [ 75.075299][ T4743] __dump_stack+0x30/0x40 [ 75.075976][ T4743] dump_stack_lvl+0xf4/0x15c [ 75.076833][ T4743] dump_stack+0x1c/0x5c [ 75.077469][ T4743] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.078335][ T4743] dccp_xmit_packet+0x298/0x460 [ 75.079636][ T4743] dccp_write_xmit+0x118/0x1d0 [ 75.080470][ T4743] dccp_sendmsg+0x510/0x850 [ 75.081220][ T4743] inet_sendmsg+0x154/0x27c [ 75.081969][ T4743] __sys_sendto+0x30c/0x420 [ 75.082727][ T4743] __arm64_sys_sendto+0xe4/0x104 [ 75.083544][ T4743] invoke_syscall+0x98/0x28c [ 75.084294][ T4743] el0_svc_common+0x13c/0x258 [ 75.085072][ T4743] do_el0_svc+0x5c/0x140 [ 75.085707][ T4743] el0_svc+0x78/0x1d0 [ 75.086383][ T4743] el0t_64_sync_handler+0xcc/0xe4 [ 75.087220][ T4743] el0t_64_sync+0x1a0/0x1a4 [ 75.089171][ T4743] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.090749][ T4743] CPU: 0 PID: 4743 Comm: syz.0.41 Not tainted syzkaller #0 [ 75.091818][ T4743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.093416][ T4743] Call trace: [ 75.094003][ T4743] dump_backtrace+0x0/0x458 [ 75.094708][ T4743] show_stack+0x2c/0x3c [ 75.095303][ T4743] __dump_stack+0x30/0x40 [ 75.095912][ T4743] dump_stack_lvl+0xf4/0x15c [ 75.096581][ T4743] dump_stack+0x1c/0x5c [ 75.097191][ T4743] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.098049][ T4743] dccp_xmit_packet+0x298/0x460 [ 75.098929][ T4743] dccp_write_xmit+0x118/0x1d0 [ 75.099700][ T4743] dccp_sendmsg+0x510/0x850 [ 75.100498][ T4743] inet_sendmsg+0x154/0x27c [ 75.101253][ T4743] __sys_sendto+0x30c/0x420 [ 75.101972][ T4743] __arm64_sys_sendto+0xe4/0x104 [ 75.102789][ T4743] invoke_syscall+0x98/0x28c [ 75.103537][ T4743] el0_svc_common+0x13c/0x258 [ 75.104218][ T4743] do_el0_svc+0x5c/0x140 [ 75.104866][ T4743] el0_svc+0x78/0x1d0 [ 75.105541][ T4743] el0t_64_sync_handler+0xcc/0xe4 [ 75.106299][ T4743] el0t_64_sync+0x1a0/0x1a4 [ 75.107280][ T4743] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.109156][ T4743] CPU: 0 PID: 4743 Comm: syz.0.41 Not tainted syzkaller #0 [ 75.110203][ T4743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.111812][ T4743] Call trace: [ 75.112354][ T4743] dump_backtrace+0x0/0x458 [ 75.113111][ T4743] show_stack+0x2c/0x3c [ 75.113821][ T4743] __dump_stack+0x30/0x40 [ 75.114519][ T4743] dump_stack_lvl+0xf4/0x15c [ 75.115186][ T4743] dump_stack+0x1c/0x5c [ 75.115866][ T4743] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.116755][ T4743] dccp_xmit_packet+0x298/0x460 [ 75.117566][ T4743] dccp_write_xmit+0x118/0x1d0 [ 75.118295][ T4743] dccp_sendmsg+0x510/0x850 [ 75.119004][ T4743] inet_sendmsg+0x154/0x27c [ 75.119696][ T4743] __sys_sendto+0x30c/0x420 [ 75.120436][ T4743] __arm64_sys_sendto+0xe4/0x104 [ 75.121230][ T4743] invoke_syscall+0x98/0x28c [ 75.121957][ T4743] el0_svc_common+0x13c/0x258 [ 75.122713][ T4743] do_el0_svc+0x5c/0x140 [ 75.123387][ T4743] el0_svc+0x78/0x1d0 [ 75.124016][ T4743] el0t_64_sync_handler+0xcc/0xe4 [ 75.124791][ T4743] el0t_64_sync+0x1a0/0x1a4 [ 75.125817][ T4743] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.127427][ T4743] CPU: 0 PID: 4743 Comm: syz.0.41 Not tainted syzkaller #0 [ 75.128704][ T4743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.130293][ T4743] Call trace: [ 75.130822][ T4743] dump_backtrace+0x0/0x458 [ 75.131577][ T4743] show_stack+0x2c/0x3c [ 75.132345][ T4743] __dump_stack+0x30/0x40 [ 75.133077][ T4743] dump_stack_lvl+0xf4/0x15c [ 75.133843][ T4743] dump_stack+0x1c/0x5c [ 75.134487][ T4743] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.135316][ T4743] dccp_xmit_packet+0x298/0x460 [ 75.136065][ T4743] dccp_write_xmit+0x118/0x1d0 [ 75.136788][ T4743] dccp_sendmsg+0x510/0x850 [ 75.137420][ T4743] inet_sendmsg+0x154/0x27c [ 75.138157][ T4743] __sys_sendto+0x30c/0x420 [ 75.138868][ T4743] __arm64_sys_sendto+0xe4/0x104 [ 75.139680][ T4743] invoke_syscall+0x98/0x28c [ 75.140423][ T4743] el0_svc_common+0x13c/0x258 [ 75.141198][ T4743] do_el0_svc+0x5c/0x140 [ 75.141893][ T4743] el0_svc+0x78/0x1d0 [ 75.142567][ T4743] el0t_64_sync_handler+0xcc/0xe4 [ 75.143355][ T4743] el0t_64_sync+0x1a0/0x1a4 [ 75.144367][ T4743] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.146087][ T4743] CPU: 0 PID: 4743 Comm: syz.0.41 Not tainted syzkaller #0 [ 75.147129][ T4743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.148583][ T4743] Call trace: [ 75.149086][ T4743] dump_backtrace+0x0/0x458 [ 75.149823][ T4743] show_stack+0x2c/0x3c [ 75.150542][ T4743] __dump_stack+0x30/0x40 [ 75.151200][ T4743] dump_stack_lvl+0xf4/0x15c [ 75.151916][ T4743] dump_stack+0x1c/0x5c [ 75.152528][ T4743] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.153460][ T4743] dccp_xmit_packet+0x298/0x460 [ 75.154219][ T4743] dccp_write_xmit+0x118/0x1d0 [ 75.155010][ T4743] dccp_sendmsg+0x510/0x850 [ 75.155760][ T4743] inet_sendmsg+0x154/0x27c [ 75.156478][ T4743] __sys_sendto+0x30c/0x420 [ 75.157213][ T4743] __arm64_sys_sendto+0xe4/0x104 [ 75.157962][ T4743] invoke_syscall+0x98/0x28c [ 75.158900][ T4743] el0_svc_common+0x13c/0x258 [ 75.159711][ T4743] do_el0_svc+0x5c/0x140 [ 75.160336][ T4743] el0_svc+0x78/0x1d0 [ 75.160979][ T4743] el0t_64_sync_handler+0xcc/0xe4 [ 75.161794][ T4743] el0t_64_sync+0x1a0/0x1a4 [ 75.163302][ T4743] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.164969][ T4743] CPU: 0 PID: 4743 Comm: syz.0.41 Not tainted syzkaller #0 [ 75.166091][ T4743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.167634][ T4743] Call trace: [ 75.168225][ T4743] dump_backtrace+0x0/0x458 [ 75.169042][ T4743] show_stack+0x2c/0x3c [ 75.169741][ T4743] __dump_stack+0x30/0x40 [ 75.170474][ T4743] dump_stack_lvl+0xf4/0x15c [ 75.171290][ T4743] dump_stack+0x1c/0x5c [ 75.171993][ T4743] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.172954][ T4743] dccp_xmit_packet+0x298/0x460 [ 75.173781][ T4743] dccp_write_xmit+0x118/0x1d0 [ 75.174635][ T4743] dccp_sendmsg+0x510/0x850 [ 75.175327][ T4743] inet_sendmsg+0x154/0x27c [ 75.176033][ T4743] __sys_sendto+0x30c/0x420 [ 75.176868][ T4743] __arm64_sys_sendto+0xe4/0x104 [ 75.177661][ T4743] invoke_syscall+0x98/0x28c [ 75.178387][ T4743] el0_svc_common+0x13c/0x258 [ 75.179126][ T4743] do_el0_svc+0x5c/0x140 [ 75.179799][ T4743] el0_svc+0x78/0x1d0 [ 75.180484][ T4743] el0t_64_sync_handler+0xcc/0xe4 [ 75.181287][ T4743] el0t_64_sync+0x1a0/0x1a4 [ 75.182247][ T4743] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.183854][ T4743] CPU: 0 PID: 4743 Comm: syz.0.41 Not tainted syzkaller #0 [ 75.184905][ T4743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.186360][ T4743] Call trace: [ 75.186893][ T4743] dump_backtrace+0x0/0x458 [ 75.187607][ T4743] show_stack+0x2c/0x3c [ 75.188270][ T4743] __dump_stack+0x30/0x40 [ 75.188987][ T4743] dump_stack_lvl+0xf4/0x15c [ 75.189737][ T4743] dump_stack+0x1c/0x5c [ 75.190424][ T4743] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.191420][ T4743] dccp_xmit_packet+0x298/0x460 [ 75.192226][ T4743] dccp_write_xmit+0x118/0x1d0 [ 75.193090][ T4743] dccp_sendmsg+0x510/0x850 [ 75.193846][ T4743] inet_sendmsg+0x154/0x27c [ 75.194544][ T4743] __sys_sendto+0x30c/0x420 [ 75.195241][ T4743] __arm64_sys_sendto+0xe4/0x104 [ 75.196019][ T4743] invoke_syscall+0x98/0x28c [ 75.196803][ T4743] el0_svc_common+0x13c/0x258 [ 75.197537][ T4743] do_el0_svc+0x5c/0x140 [ 75.198142][ T4743] el0_svc+0x78/0x1d0 [ 75.198778][ T4743] el0t_64_sync_handler+0xcc/0xe4 [ 75.199720][ T4743] el0t_64_sync+0x1a0/0x1a4 [ 75.200590][ T4743] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.202270][ T4743] CPU: 0 PID: 4743 Comm: syz.0.41 Not tainted syzkaller #0 [ 75.203353][ T4743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.204840][ T4743] Call trace: [ 75.205391][ T4743] dump_backtrace+0x0/0x458 [ 75.206118][ T4743] show_stack+0x2c/0x3c [ 75.206716][ T4743] __dump_stack+0x30/0x40 [ 75.207352][ T4743] dump_stack_lvl+0xf4/0x15c [ 75.208037][ T4743] dump_stack+0x1c/0x5c [ 75.208722][ T4743] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.209568][ T4743] dccp_xmit_packet+0x298/0x460 [ 75.210320][ T4743] dccp_write_xmit+0x118/0x1d0 [ 75.211106][ T4743] dccp_sendmsg+0x510/0x850 [ 75.211881][ T4743] inet_sendmsg+0x154/0x27c [ 75.212600][ T4743] __sys_sendto+0x30c/0x420 [ 75.213355][ T4743] __arm64_sys_sendto+0xe4/0x104 [ 75.214157][ T4743] invoke_syscall+0x98/0x28c [ 75.214914][ T4743] el0_svc_common+0x13c/0x258 [ 75.215675][ T4743] do_el0_svc+0x5c/0x140 [ 75.216390][ T4743] el0_svc+0x78/0x1d0 [ 75.217024][ T4743] el0t_64_sync_handler+0xcc/0xe4 [ 75.217842][ T4743] el0t_64_sync+0x1a0/0x1a4 [ 75.218810][ T4743] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.220563][ T4743] CPU: 0 PID: 4743 Comm: syz.0.41 Not tainted syzkaller #0 [ 75.221659][ T4743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.223224][ T4743] Call trace: [ 75.223723][ T4743] dump_backtrace+0x0/0x458 [ 75.224427][ T4743] show_stack+0x2c/0x3c [ 75.224986][ T4743] __dump_stack+0x30/0x40 [ 75.225635][ T4743] dump_stack_lvl+0xf4/0x15c [ 75.226350][ T4743] dump_stack+0x1c/0x5c [ 75.226992][ T4743] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.227783][ T4743] dccp_xmit_packet+0x298/0x460 [ 75.228548][ T4743] dccp_write_xmit+0x118/0x1d0 [ 75.229368][ T4743] dccp_sendmsg+0x510/0x850 [ 75.230085][ T4743] inet_sendmsg+0x154/0x27c [ 75.230821][ T4743] __sys_sendto+0x30c/0x420 [ 75.231494][ T4743] __arm64_sys_sendto+0xe4/0x104 [ 75.232252][ T4743] invoke_syscall+0x98/0x28c [ 75.233012][ T4743] el0_svc_common+0x13c/0x258 [ 75.233792][ T4743] do_el0_svc+0x5c/0x140 [ 75.234491][ T4743] el0_svc+0x78/0x1d0 [ 75.235247][ T4743] el0t_64_sync_handler+0xcc/0xe4 [ 75.236262][ T4743] el0t_64_sync+0x1a0/0x1a4 [ 75.237265][ T4743] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.239220][ T4743] CPU: 0 PID: 4743 Comm: syz.0.41 Not tainted syzkaller #0 [ 75.240487][ T4743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.241937][ T4743] Call trace: [ 75.242497][ T4743] dump_backtrace+0x0/0x458 [ 75.243195][ T4743] show_stack+0x2c/0x3c [ 75.243761][ T4743] __dump_stack+0x30/0x40 [ 75.244400][ T4743] dump_stack_lvl+0xf4/0x15c [ 75.245100][ T4743] dump_stack+0x1c/0x5c [ 75.245757][ T4743] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.246591][ T4743] dccp_xmit_packet+0x298/0x460 [ 75.247522][ T4743] dccp_write_xmit+0x118/0x1d0 [ 75.248222][ T4743] dccp_sendmsg+0x510/0x850 [ 75.249134][ T4743] inet_sendmsg+0x154/0x27c [ 75.250039][ T4743] __sys_sendto+0x30c/0x420 [ 75.250899][ T4743] __arm64_sys_sendto+0xe4/0x104 [ 75.251756][ T4743] invoke_syscall+0x98/0x28c [ 75.252590][ T4743] el0_svc_common+0x13c/0x258 [ 75.253469][ T4743] do_el0_svc+0x5c/0x140 [ 75.254132][ T4743] el0_svc+0x78/0x1d0 [ 75.254824][ T4743] el0t_64_sync_handler+0xcc/0xe4 [ 75.255579][ T4743] el0t_64_sync+0x1a0/0x1a4 [ 75.256532][ T4743] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.258219][ T4743] CPU: 0 PID: 4743 Comm: syz.0.41 Not tainted syzkaller #0 [ 75.259322][ T4743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.260814][ T4743] Call trace: [ 75.261272][ T4743] dump_backtrace+0x0/0x458 [ 75.261880][ T4743] show_stack+0x2c/0x3c [ 75.262515][ T4743] __dump_stack+0x30/0x40 [ 75.263160][ T4743] dump_stack_lvl+0xf4/0x15c [ 75.263896][ T4743] dump_stack+0x1c/0x5c [ 75.264508][ T4743] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.265335][ T4743] dccp_xmit_packet+0x298/0x460 [ 75.266072][ T4743] dccp_write_xmit+0x118/0x1d0 [ 75.266795][ T4743] dccp_sendmsg+0x510/0x850 [ 75.267510][ T4743] inet_sendmsg+0x154/0x27c [ 75.268245][ T4743] __sys_sendto+0x30c/0x420 [ 75.268970][ T4743] __arm64_sys_sendto+0xe4/0x104 [ 75.269793][ T4743] invoke_syscall+0x98/0x28c [ 75.270481][ T4743] el0_svc_common+0x13c/0x258 [ 75.271270][ T4743] do_el0_svc+0x5c/0x140 [ 75.271996][ T4743] el0_svc+0x78/0x1d0 [ 75.272661][ T4743] el0t_64_sync_handler+0xcc/0xe4 [ 75.273530][ T4743] el0t_64_sync+0x1a0/0x1a4 [ 75.274860][ T4743] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.276520][ T4743] CPU: 0 PID: 4743 Comm: syz.0.41 Not tainted syzkaller #0 [ 75.277507][ T4743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.279249][ T4743] Call trace: [ 75.279762][ T4743] dump_backtrace+0x0/0x458 [ 75.280501][ T4743] show_stack+0x2c/0x3c [ 75.281308][ T4743] __dump_stack+0x30/0x40 [ 75.282124][ T4743] dump_stack_lvl+0xf4/0x15c [ 75.283046][ T4743] dump_stack+0x1c/0x5c [ 75.283834][ T4743] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.284854][ T4743] dccp_xmit_packet+0x298/0x460 [ 75.285622][ T4743] dccp_write_xmit+0x118/0x1d0 [ 75.286389][ T4743] dccp_sendmsg+0x510/0x850 [ 75.287068][ T4743] inet_sendmsg+0x154/0x27c [ 75.287769][ T4743] __sys_sendto+0x30c/0x420 [ 75.288472][ T4743] __arm64_sys_sendto+0xe4/0x104 [ 75.289253][ T4743] invoke_syscall+0x98/0x28c [ 75.290000][ T4743] el0_svc_common+0x13c/0x258 [ 75.290703][ T4743] do_el0_svc+0x5c/0x140 [ 75.291370][ T4743] el0_svc+0x78/0x1d0 [ 75.292017][ T4743] el0t_64_sync_handler+0xcc/0xe4 [ 75.292862][ T4743] el0t_64_sync+0x1a0/0x1a4 [ 75.293864][ T4743] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.295527][ T4743] CPU: 0 PID: 4743 Comm: syz.0.41 Not tainted syzkaller #0 [ 75.296672][ T4743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.298177][ T4743] Call trace: [ 75.298727][ T4743] dump_backtrace+0x0/0x458 [ 75.299442][ T4743] show_stack+0x2c/0x3c [ 75.300121][ T4743] __dump_stack+0x30/0x40 [ 75.300820][ T4743] dump_stack_lvl+0xf4/0x15c [ 75.301587][ T4743] dump_stack+0x1c/0x5c [ 75.302260][ T4743] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.303148][ T4743] dccp_xmit_packet+0x298/0x460 [ 75.303835][ T4743] dccp_write_xmit+0x118/0x1d0 [ 75.304621][ T4743] dccp_sendmsg+0x510/0x850 [ 75.305382][ T4743] inet_sendmsg+0x154/0x27c [ 75.306124][ T4743] __sys_sendto+0x30c/0x420 [ 75.306841][ T4743] __arm64_sys_sendto+0xe4/0x104 [ 75.307595][ T4743] invoke_syscall+0x98/0x28c [ 75.308305][ T4743] el0_svc_common+0x13c/0x258 [ 75.309075][ T4743] do_el0_svc+0x5c/0x140 [ 75.309760][ T4743] el0_svc+0x78/0x1d0 [ 75.310428][ T4743] el0t_64_sync_handler+0xcc/0xe4 [ 75.311210][ T4743] el0t_64_sync+0x1a0/0x1a4 [ 75.322657][ T4745] dccp_xmit_packet: Payload too large (65475) for featneg. [ 75.329761][ T4745] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.331467][ T4745] CPU: 0 PID: 4745 Comm: syz.0.42 Not tainted syzkaller #0 [ 75.332558][ T4745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.334052][ T4745] Call trace: [ 75.334551][ T4745] dump_backtrace+0x0/0x458 [ 75.335296][ T4745] show_stack+0x2c/0x3c [ 75.335910][ T4745] __dump_stack+0x30/0x40 [ 75.336573][ T4745] dump_stack_lvl+0xf4/0x15c [ 75.337195][ T4745] dump_stack+0x1c/0x5c [ 75.337806][ T4745] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.338715][ T4745] dccp_xmit_packet+0x298/0x460 [ 75.339535][ T4745] dccp_write_xmit+0x118/0x1d0 [ 75.340356][ T4745] dccp_sendmsg+0x510/0x850 [ 75.341109][ T4745] inet_sendmsg+0x154/0x27c [ 75.341903][ T4745] __sys_sendto+0x30c/0x420 [ 75.342600][ T4745] __arm64_sys_sendto+0xe4/0x104 [ 75.343419][ T4745] invoke_syscall+0x98/0x28c [ 75.344209][ T4745] el0_svc_common+0x13c/0x258 [ 75.344997][ T4745] do_el0_svc+0x5c/0x140 [ 75.345706][ T4745] el0_svc+0x78/0x1d0 [ 75.346423][ T4745] el0t_64_sync_handler+0xcc/0xe4 [ 75.347224][ T4745] el0t_64_sync+0x1a0/0x1a4 [ 75.348265][ T4745] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.349922][ T4745] CPU: 0 PID: 4745 Comm: syz.0.42 Not tainted syzkaller #0 [ 75.351062][ T4745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.352509][ T4745] Call trace: [ 75.352952][ T4745] dump_backtrace+0x0/0x458 [ 75.353598][ T4745] show_stack+0x2c/0x3c [ 75.354230][ T4745] __dump_stack+0x30/0x40 [ 75.354864][ T4745] dump_stack_lvl+0xf4/0x15c [ 75.355591][ T4745] dump_stack+0x1c/0x5c [ 75.356222][ T4745] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.357003][ T4745] dccp_xmit_packet+0x298/0x460 [ 75.357664][ T4745] dccp_write_xmit+0x118/0x1d0 [ 75.358460][ T4745] dccp_sendmsg+0x510/0x850 [ 75.359173][ T4745] inet_sendmsg+0x154/0x27c [ 75.359917][ T4745] __sys_sendto+0x30c/0x420 [ 75.360683][ T4745] __arm64_sys_sendto+0xe4/0x104 [ 75.361521][ T4745] invoke_syscall+0x98/0x28c [ 75.362303][ T4745] el0_svc_common+0x13c/0x258 [ 75.363181][ T4745] do_el0_svc+0x5c/0x140 [ 75.363937][ T4745] el0_svc+0x78/0x1d0 [ 75.364540][ T4745] el0t_64_sync_handler+0xcc/0xe4 [ 75.365334][ T4745] el0t_64_sync+0x1a0/0x1a4 [ 75.366685][ T4745] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.368559][ T4745] CPU: 0 PID: 4745 Comm: syz.0.42 Not tainted syzkaller #0 [ 75.369608][ T4745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.371053][ T4745] Call trace: [ 75.371541][ T4745] dump_backtrace+0x0/0x458 [ 75.372122][ T4745] show_stack+0x2c/0x3c [ 75.372720][ T4745] __dump_stack+0x30/0x40 [ 75.373350][ T4745] dump_stack_lvl+0xf4/0x15c [ 75.373952][ T4745] dump_stack+0x1c/0x5c [ 75.374608][ T4745] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.375472][ T4745] dccp_xmit_packet+0x298/0x460 [ 75.376333][ T4745] dccp_write_xmit+0x118/0x1d0 [ 75.377071][ T4745] dccp_sendmsg+0x510/0x850 [ 75.377733][ T4745] inet_sendmsg+0x154/0x27c [ 75.378426][ T4745] __sys_sendto+0x30c/0x420 [ 75.379137][ T4745] __arm64_sys_sendto+0xe4/0x104 [ 75.379948][ T4745] invoke_syscall+0x98/0x28c [ 75.380687][ T4745] el0_svc_common+0x13c/0x258 [ 75.381433][ T4745] do_el0_svc+0x5c/0x140 [ 75.382096][ T4745] el0_svc+0x78/0x1d0 [ 75.382719][ T4745] el0t_64_sync_handler+0xcc/0xe4 [ 75.383536][ T4745] el0t_64_sync+0x1a0/0x1a4 [ 75.384876][ T4745] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.386525][ T4745] CPU: 0 PID: 4745 Comm: syz.0.42 Not tainted syzkaller #0 [ 75.387619][ T4745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.389211][ T4745] Call trace: [ 75.389763][ T4745] dump_backtrace+0x0/0x458 [ 75.390492][ T4745] show_stack+0x2c/0x3c [ 75.391209][ T4745] __dump_stack+0x30/0x40 [ 75.391917][ T4745] dump_stack_lvl+0xf4/0x15c [ 75.392606][ T4745] dump_stack+0x1c/0x5c [ 75.393289][ T4745] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.394105][ T4745] dccp_xmit_packet+0x298/0x460 [ 75.394853][ T4745] dccp_write_xmit+0x118/0x1d0 [ 75.395586][ T4745] dccp_sendmsg+0x510/0x850 [ 75.396242][ T4745] inet_sendmsg+0x154/0x27c [ 75.396917][ T4745] __sys_sendto+0x30c/0x420 [ 75.397647][ T4745] __arm64_sys_sendto+0xe4/0x104 [ 75.398480][ T4745] invoke_syscall+0x98/0x28c [ 75.399220][ T4745] el0_svc_common+0x13c/0x258 [ 75.399946][ T4745] do_el0_svc+0x5c/0x140 [ 75.400643][ T4745] el0_svc+0x78/0x1d0 [ 75.401259][ T4745] el0t_64_sync_handler+0xcc/0xe4 [ 75.402076][ T4745] el0t_64_sync+0x1a0/0x1a4 [ 75.402998][ T4745] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.404705][ T4745] CPU: 0 PID: 4745 Comm: syz.0.42 Not tainted syzkaller #0 [ 75.405812][ T4745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.407341][ T4745] Call trace: [ 75.407853][ T4745] dump_backtrace+0x0/0x458 [ 75.408576][ T4745] show_stack+0x2c/0x3c [ 75.409263][ T4745] __dump_stack+0x30/0x40 [ 75.409951][ T4745] dump_stack_lvl+0xf4/0x15c [ 75.410646][ T4745] dump_stack+0x1c/0x5c [ 75.411262][ T4745] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.412075][ T4745] dccp_xmit_packet+0x298/0x460 [ 75.412880][ T4745] dccp_write_xmit+0x118/0x1d0 [ 75.413688][ T4745] dccp_sendmsg+0x510/0x850 [ 75.414414][ T4745] inet_sendmsg+0x154/0x27c [ 75.415156][ T4745] __sys_sendto+0x30c/0x420 [ 75.415808][ T4745] __arm64_sys_sendto+0xe4/0x104 [ 75.416561][ T4745] invoke_syscall+0x98/0x28c [ 75.417331][ T4745] el0_svc_common+0x13c/0x258 [ 75.418130][ T4745] do_el0_svc+0x5c/0x140 [ 75.418800][ T4745] el0_svc+0x78/0x1d0 [ 75.419400][ T4745] el0t_64_sync_handler+0xcc/0xe4 [ 75.420205][ T4745] el0t_64_sync+0x1a0/0x1a4 [ 75.421149][ T4745] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.422755][ T4745] CPU: 0 PID: 4745 Comm: syz.0.42 Not tainted syzkaller #0 [ 75.423790][ T4745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.425299][ T4745] Call trace: [ 75.425787][ T4745] dump_backtrace+0x0/0x458 [ 75.426403][ T4745] show_stack+0x2c/0x3c [ 75.427011][ T4745] __dump_stack+0x30/0x40 [ 75.427654][ T4745] dump_stack_lvl+0xf4/0x15c [ 75.428395][ T4745] dump_stack+0x1c/0x5c [ 75.429023][ T4745] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.429910][ T4745] dccp_xmit_packet+0x298/0x460 [ 75.430650][ T4745] dccp_write_xmit+0x118/0x1d0 [ 75.431508][ T4745] dccp_sendmsg+0x510/0x850 [ 75.432213][ T4745] inet_sendmsg+0x154/0x27c [ 75.432915][ T4745] __sys_sendto+0x30c/0x420 [ 75.433629][ T4745] __arm64_sys_sendto+0xe4/0x104 [ 75.434417][ T4745] invoke_syscall+0x98/0x28c [ 75.435091][ T4745] el0_svc_common+0x13c/0x258 [ 75.435848][ T4745] do_el0_svc+0x5c/0x140 [ 75.436519][ T4745] el0_svc+0x78/0x1d0 [ 75.437125][ T4745] el0t_64_sync_handler+0xcc/0xe4 [ 75.437976][ T4745] el0t_64_sync+0x1a0/0x1a4 [ 75.438939][ T4745] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.440535][ T4745] CPU: 0 PID: 4745 Comm: syz.0.42 Not tainted syzkaller #0 [ 75.441614][ T4745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.443019][ T4745] Call trace: [ 75.443473][ T4745] dump_backtrace+0x0/0x458 [ 75.444152][ T4745] show_stack+0x2c/0x3c [ 75.444671][ T4745] __dump_stack+0x30/0x40 [ 75.445352][ T4745] dump_stack_lvl+0xf4/0x15c [ 75.446028][ T4745] dump_stack+0x1c/0x5c [ 75.446659][ T4745] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.447427][ T4745] dccp_xmit_packet+0x298/0x460 [ 75.448092][ T4745] dccp_write_xmit+0x118/0x1d0 [ 75.448837][ T4745] dccp_sendmsg+0x510/0x850 [ 75.449570][ T4745] inet_sendmsg+0x154/0x27c [ 75.450385][ T4745] __sys_sendto+0x30c/0x420 [ 75.451139][ T4745] __arm64_sys_sendto+0xe4/0x104 [ 75.451868][ T4745] invoke_syscall+0x98/0x28c [ 75.452674][ T4745] el0_svc_common+0x13c/0x258 [ 75.453411][ T4745] do_el0_svc+0x5c/0x140 [ 75.454151][ T4745] el0_svc+0x78/0x1d0 [ 75.454857][ T4745] el0t_64_sync_handler+0xcc/0xe4 [ 75.455653][ T4745] el0t_64_sync+0x1a0/0x1a4 [ 75.456537][ T4745] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.458284][ T4745] CPU: 0 PID: 4745 Comm: syz.0.42 Not tainted syzkaller #0 [ 75.459248][ T4745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.460737][ T4745] Call trace: [ 75.461259][ T4745] dump_backtrace+0x0/0x458 [ 75.461897][ T4745] show_stack+0x2c/0x3c [ 75.462492][ T4745] __dump_stack+0x30/0x40 [ 75.463137][ T4745] dump_stack_lvl+0xf4/0x15c [ 75.463811][ T4745] dump_stack+0x1c/0x5c [ 75.464412][ T4745] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.465260][ T4745] dccp_xmit_packet+0x298/0x460 [ 75.466038][ T4745] dccp_write_xmit+0x118/0x1d0 [ 75.466829][ T4745] dccp_sendmsg+0x510/0x850 [ 75.467555][ T4745] inet_sendmsg+0x154/0x27c [ 75.468210][ T4745] __sys_sendto+0x30c/0x420 [ 75.469034][ T4745] __arm64_sys_sendto+0xe4/0x104 [ 75.469915][ T4745] invoke_syscall+0x98/0x28c [ 75.470675][ T4745] el0_svc_common+0x13c/0x258 [ 75.471438][ T4745] do_el0_svc+0x5c/0x140 [ 75.472154][ T4745] el0_svc+0x78/0x1d0 [ 75.472796][ T4745] el0t_64_sync_handler+0xcc/0xe4 [ 75.473620][ T4745] el0t_64_sync+0x1a0/0x1a4 [ 75.474522][ T4745] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.476140][ T4745] CPU: 0 PID: 4745 Comm: syz.0.42 Not tainted syzkaller #0 [ 75.477209][ T4745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.478721][ T4745] Call trace: [ 75.479201][ T4745] dump_backtrace+0x0/0x458 [ 75.479914][ T4745] show_stack+0x2c/0x3c [ 75.480538][ T4745] __dump_stack+0x30/0x40 [ 75.481219][ T4745] dump_stack_lvl+0xf4/0x15c [ 75.481994][ T4745] dump_stack+0x1c/0x5c [ 75.482674][ T4745] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.483560][ T4745] dccp_xmit_packet+0x298/0x460 [ 75.484342][ T4745] dccp_write_xmit+0x118/0x1d0 [ 75.485090][ T4745] dccp_sendmsg+0x510/0x850 [ 75.485776][ T4745] inet_sendmsg+0x154/0x27c [ 75.486450][ T4745] __sys_sendto+0x30c/0x420 [ 75.487207][ T4745] __arm64_sys_sendto+0xe4/0x104 [ 75.488024][ T4745] invoke_syscall+0x98/0x28c [ 75.488765][ T4745] el0_svc_common+0x13c/0x258 [ 75.489497][ T4745] do_el0_svc+0x5c/0x140 [ 75.490168][ T4745] el0_svc+0x78/0x1d0 [ 75.490814][ T4745] el0t_64_sync_handler+0xcc/0xe4 [ 75.491611][ T4745] el0t_64_sync+0x1a0/0x1a4 [ 75.492938][ T4745] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.494584][ T4745] CPU: 0 PID: 4745 Comm: syz.0.42 Not tainted syzkaller #0 [ 75.495627][ T4745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.497112][ T4745] Call trace: [ 75.497569][ T4745] dump_backtrace+0x0/0x458 [ 75.498239][ T4745] show_stack+0x2c/0x3c [ 75.498969][ T4745] __dump_stack+0x30/0x40 [ 75.499723][ T4745] dump_stack_lvl+0xf4/0x15c [ 75.500551][ T4745] dump_stack+0x1c/0x5c [ 75.501220][ T4745] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.502139][ T4745] dccp_xmit_packet+0x298/0x460 [ 75.503020][ T4745] dccp_write_xmit+0x118/0x1d0 [ 75.503878][ T4745] dccp_sendmsg+0x510/0x850 [ 75.504583][ T4745] inet_sendmsg+0x154/0x27c [ 75.505290][ T4745] __sys_sendto+0x30c/0x420 [ 75.506021][ T4745] __arm64_sys_sendto+0xe4/0x104 [ 75.506824][ T4745] invoke_syscall+0x98/0x28c [ 75.507569][ T4745] el0_svc_common+0x13c/0x258 [ 75.508433][ T4745] do_el0_svc+0x5c/0x140 [ 75.509117][ T4745] el0_svc+0x78/0x1d0 [ 75.509768][ T4745] el0t_64_sync_handler+0xcc/0xe4 [ 75.510598][ T4745] el0t_64_sync+0x1a0/0x1a4 [ 75.511705][ T4745] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.513402][ T4745] CPU: 0 PID: 4745 Comm: syz.0.42 Not tainted syzkaller #0 [ 75.514477][ T4745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.515960][ T4745] Call trace: [ 75.516470][ T4745] dump_backtrace+0x0/0x458 [ 75.517131][ T4745] show_stack+0x2c/0x3c [ 75.517754][ T4745] __dump_stack+0x30/0x40 [ 75.518422][ T4745] dump_stack_lvl+0xf4/0x15c [ 75.519200][ T4745] dump_stack+0x1c/0x5c [ 75.519857][ T4745] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.520666][ T4745] dccp_xmit_packet+0x298/0x460 [ 75.521391][ T4745] dccp_write_xmit+0x118/0x1d0 [ 75.522210][ T4745] dccp_sendmsg+0x510/0x850 [ 75.522980][ T4745] inet_sendmsg+0x154/0x27c [ 75.523706][ T4745] __sys_sendto+0x30c/0x420 [ 75.524458][ T4745] __arm64_sys_sendto+0xe4/0x104 [ 75.525278][ T4745] invoke_syscall+0x98/0x28c [ 75.526062][ T4745] el0_svc_common+0x13c/0x258 [ 75.526804][ T4745] do_el0_svc+0x5c/0x140 [ 75.527432][ T4745] el0_svc+0x78/0x1d0 [ 75.528047][ T4745] el0t_64_sync_handler+0xcc/0xe4 [ 75.528831][ T4745] el0t_64_sync+0x1a0/0x1a4 [ 75.529774][ T4745] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.531388][ T4745] CPU: 0 PID: 4745 Comm: syz.0.42 Not tainted syzkaller #0 [ 75.532418][ T4745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.533873][ T4745] Call trace: [ 75.534368][ T4745] dump_backtrace+0x0/0x458 [ 75.535026][ T4745] show_stack+0x2c/0x3c [ 75.535660][ T4745] __dump_stack+0x30/0x40 [ 75.536314][ T4745] dump_stack_lvl+0xf4/0x15c [ 75.537043][ T4745] dump_stack+0x1c/0x5c [ 75.537619][ T4745] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.538475][ T4745] dccp_xmit_packet+0x298/0x460 [ 75.539258][ T4745] dccp_write_xmit+0x118/0x1d0 [ 75.540035][ T4745] dccp_sendmsg+0x510/0x850 [ 75.540798][ T4745] inet_sendmsg+0x154/0x27c [ 75.541506][ T4745] __sys_sendto+0x30c/0x420 [ 75.542240][ T4745] __arm64_sys_sendto+0xe4/0x104 [ 75.543014][ T4745] invoke_syscall+0x98/0x28c [ 75.543731][ T4745] el0_svc_common+0x13c/0x258 [ 75.544477][ T4745] do_el0_svc+0x5c/0x140 [ 75.545128][ T4745] el0_svc+0x78/0x1d0 [ 75.545794][ T4745] el0t_64_sync_handler+0xcc/0xe4 [ 75.546632][ T4745] el0t_64_sync+0x1a0/0x1a4 [ 75.547569][ T4745] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.549479][ T4745] CPU: 0 PID: 4745 Comm: syz.0.42 Not tainted syzkaller #0 [ 75.550561][ T4745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.552048][ T4745] Call trace: [ 75.552506][ T4745] dump_backtrace+0x0/0x458 [ 75.553107][ T4745] show_stack+0x2c/0x3c [ 75.553728][ T4745] __dump_stack+0x30/0x40 [ 75.554405][ T4745] dump_stack_lvl+0xf4/0x15c [ 75.555153][ T4745] dump_stack+0x1c/0x5c [ 75.555726][ T4745] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.556767][ T4745] dccp_xmit_packet+0x298/0x460 [ 75.557478][ T4745] dccp_write_xmit+0x118/0x1d0 [ 75.558230][ T4745] dccp_sendmsg+0x510/0x850 [ 75.559073][ T4745] inet_sendmsg+0x154/0x27c [ 75.559874][ T4745] __sys_sendto+0x30c/0x420 [ 75.560664][ T4745] __arm64_sys_sendto+0xe4/0x104 [ 75.561493][ T4745] invoke_syscall+0x98/0x28c [ 75.562331][ T4745] el0_svc_common+0x13c/0x258 [ 75.563128][ T4745] do_el0_svc+0x5c/0x140 [ 75.563854][ T4745] el0_svc+0x78/0x1d0 [ 75.564479][ T4745] el0t_64_sync_handler+0xcc/0xe4 [ 75.565311][ T4745] el0t_64_sync+0x1a0/0x1a4 [ 75.566180][ T4745] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.567822][ T4745] CPU: 0 PID: 4745 Comm: syz.0.42 Not tainted syzkaller #0 [ 75.568961][ T4745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.570609][ T4745] Call trace: [ 75.571140][ T4745] dump_backtrace+0x0/0x458 [ 75.571954][ T4745] show_stack+0x2c/0x3c [ 75.572695][ T4745] __dump_stack+0x30/0x40 [ 75.573419][ T4745] dump_stack_lvl+0xf4/0x15c [ 75.574228][ T4745] dump_stack+0x1c/0x5c [ 75.574902][ T4745] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.575790][ T4745] dccp_xmit_packet+0x298/0x460 [ 75.576554][ T4745] dccp_write_xmit+0x118/0x1d0 [ 75.577308][ T4745] dccp_sendmsg+0x510/0x850 [ 75.577981][ T4745] inet_sendmsg+0x154/0x27c [ 75.578649][ T4745] __sys_sendto+0x30c/0x420 [ 75.579307][ T4745] __arm64_sys_sendto+0xe4/0x104 [ 75.580169][ T4745] invoke_syscall+0x98/0x28c [ 75.580995][ T4745] el0_svc_common+0x13c/0x258 [ 75.581773][ T4745] do_el0_svc+0x5c/0x140 [ 75.582490][ T4745] el0_svc+0x78/0x1d0 [ 75.583196][ T4745] el0t_64_sync_handler+0xcc/0xe4 [ 75.583957][ T4745] el0t_64_sync+0x1a0/0x1a4 [ 75.595758][ T4747] dccp_xmit_packet: Payload too large (65475) for featneg. [ 75.602806][ T4747] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.604484][ T4747] CPU: 1 PID: 4747 Comm: syz.0.43 Not tainted syzkaller #0 [ 75.605547][ T4747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.607157][ T4747] Call trace: [ 75.607634][ T4747] dump_backtrace+0x0/0x458 [ 75.608323][ T4747] show_stack+0x2c/0x3c [ 75.608940][ T4747] __dump_stack+0x30/0x40 [ 75.609689][ T4747] dump_stack_lvl+0xf4/0x15c [ 75.610493][ T4747] dump_stack+0x1c/0x5c [ 75.611153][ T4747] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.612044][ T4747] dccp_xmit_packet+0x298/0x460 [ 75.612820][ T4747] dccp_write_xmit+0x118/0x1d0 [ 75.613540][ T4747] dccp_sendmsg+0x510/0x850 [ 75.614221][ T4747] inet_sendmsg+0x154/0x27c [ 75.614949][ T4747] __sys_sendto+0x30c/0x420 [ 75.615760][ T4747] __arm64_sys_sendto+0xe4/0x104 [ 75.616604][ T4747] invoke_syscall+0x98/0x28c [ 75.617392][ T4747] el0_svc_common+0x13c/0x258 [ 75.618107][ T4747] do_el0_svc+0x5c/0x140 [ 75.618837][ T4747] el0_svc+0x78/0x1d0 [ 75.619497][ T4747] el0t_64_sync_handler+0xcc/0xe4 [ 75.620271][ T4747] el0t_64_sync+0x1a0/0x1a4 [ 75.621262][ T4747] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.623097][ T4747] CPU: 1 PID: 4747 Comm: syz.0.43 Not tainted syzkaller #0 [ 75.624195][ T4747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.625789][ T4747] Call trace: [ 75.626324][ T4747] dump_backtrace+0x0/0x458 [ 75.627072][ T4747] show_stack+0x2c/0x3c [ 75.627696][ T4747] __dump_stack+0x30/0x40 [ 75.628342][ T4747] dump_stack_lvl+0xf4/0x15c [ 75.629070][ T4747] dump_stack+0x1c/0x5c [ 75.629774][ T4747] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.630652][ T4747] dccp_xmit_packet+0x298/0x460 [ 75.631491][ T4747] dccp_write_xmit+0x118/0x1d0 [ 75.632247][ T4747] dccp_sendmsg+0x510/0x850 [ 75.632967][ T4747] inet_sendmsg+0x154/0x27c [ 75.633685][ T4747] __sys_sendto+0x30c/0x420 [ 75.634451][ T4747] __arm64_sys_sendto+0xe4/0x104 [ 75.635227][ T4747] invoke_syscall+0x98/0x28c [ 75.635981][ T4747] el0_svc_common+0x13c/0x258 [ 75.636675][ T4747] do_el0_svc+0x5c/0x140 [ 75.637392][ T4747] el0_svc+0x78/0x1d0 [ 75.638086][ T4747] el0t_64_sync_handler+0xcc/0xe4 [ 75.638946][ T4747] el0t_64_sync+0x1a0/0x1a4 [ 75.639877][ T4747] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.641568][ T4747] CPU: 1 PID: 4747 Comm: syz.0.43 Not tainted syzkaller #0 [ 75.642691][ T4747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.644333][ T4747] Call trace: [ 75.644863][ T4747] dump_backtrace+0x0/0x458 [ 75.645557][ T4747] show_stack+0x2c/0x3c [ 75.646192][ T4747] __dump_stack+0x30/0x40 [ 75.646890][ T4747] dump_stack_lvl+0xf4/0x15c [ 75.647647][ T4747] dump_stack+0x1c/0x5c [ 75.648440][ T4747] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.649293][ T4747] dccp_xmit_packet+0x298/0x460 [ 75.650116][ T4747] dccp_write_xmit+0x118/0x1d0 [ 75.650894][ T4747] dccp_sendmsg+0x510/0x850 [ 75.651694][ T4747] inet_sendmsg+0x154/0x27c [ 75.652506][ T4747] __sys_sendto+0x30c/0x420 [ 75.653243][ T4747] __arm64_sys_sendto+0xe4/0x104 [ 75.654139][ T4747] invoke_syscall+0x98/0x28c [ 75.654978][ T4747] el0_svc_common+0x13c/0x258 [ 75.655817][ T4747] do_el0_svc+0x5c/0x140 [ 75.656496][ T4747] el0_svc+0x78/0x1d0 [ 75.657167][ T4747] el0t_64_sync_handler+0xcc/0xe4 [ 75.657985][ T4747] el0t_64_sync+0x1a0/0x1a4 [ 75.658922][ T4747] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.660702][ T4747] CPU: 1 PID: 4747 Comm: syz.0.43 Not tainted syzkaller #0 [ 75.661771][ T4747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.663269][ T4747] Call trace: [ 75.663847][ T4747] dump_backtrace+0x0/0x458 [ 75.664479][ T4747] show_stack+0x2c/0x3c [ 75.665093][ T4747] __dump_stack+0x30/0x40 [ 75.665789][ T4747] dump_stack_lvl+0xf4/0x15c [ 75.666530][ T4747] dump_stack+0x1c/0x5c [ 75.667147][ T4747] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.667929][ T4747] dccp_xmit_packet+0x298/0x460 [ 75.668703][ T4747] dccp_write_xmit+0x118/0x1d0 [ 75.669462][ T4747] dccp_sendmsg+0x510/0x850 [ 75.670160][ T4747] inet_sendmsg+0x154/0x27c [ 75.670906][ T4747] __sys_sendto+0x30c/0x420 [ 75.671621][ T4747] __arm64_sys_sendto+0xe4/0x104 [ 75.672412][ T4747] invoke_syscall+0x98/0x28c [ 75.673189][ T4747] el0_svc_common+0x13c/0x258 [ 75.673938][ T4747] do_el0_svc+0x5c/0x140 [ 75.674628][ T4747] el0_svc+0x78/0x1d0 [ 75.675311][ T4747] el0t_64_sync_handler+0xcc/0xe4 [ 75.676104][ T4747] el0t_64_sync+0x1a0/0x1a4 [ 75.677434][ T4747] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.679176][ T4747] CPU: 1 PID: 4747 Comm: syz.0.43 Not tainted syzkaller #0 [ 75.680248][ T4747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.681668][ T4747] Call trace: [ 75.682183][ T4747] dump_backtrace+0x0/0x458 [ 75.682922][ T4747] show_stack+0x2c/0x3c [ 75.683558][ T4747] __dump_stack+0x30/0x40 [ 75.684302][ T4747] dump_stack_lvl+0xf4/0x15c [ 75.684985][ T4747] dump_stack+0x1c/0x5c [ 75.685550][ T4747] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.686357][ T4747] dccp_xmit_packet+0x298/0x460 [ 75.687097][ T4747] dccp_write_xmit+0x118/0x1d0 [ 75.687794][ T4747] dccp_sendmsg+0x510/0x850 [ 75.688523][ T4747] inet_sendmsg+0x154/0x27c [ 75.689262][ T4747] __sys_sendto+0x30c/0x420 [ 75.689895][ T4747] __arm64_sys_sendto+0xe4/0x104 [ 75.690689][ T4747] invoke_syscall+0x98/0x28c [ 75.691398][ T4747] el0_svc_common+0x13c/0x258 [ 75.692210][ T4747] do_el0_svc+0x5c/0x140 [ 75.692942][ T4747] el0_svc+0x78/0x1d0 [ 75.693599][ T4747] el0t_64_sync_handler+0xcc/0xe4 [ 75.694364][ T4747] el0t_64_sync+0x1a0/0x1a4 [ 75.695464][ T4747] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.697143][ T4747] CPU: 1 PID: 4747 Comm: syz.0.43 Not tainted syzkaller #0 [ 75.698271][ T4747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.699921][ T4747] Call trace: [ 75.700400][ T4747] dump_backtrace+0x0/0x458 [ 75.701049][ T4747] show_stack+0x2c/0x3c [ 75.701720][ T4747] __dump_stack+0x30/0x40 [ 75.702389][ T4747] dump_stack_lvl+0xf4/0x15c [ 75.703108][ T4747] dump_stack+0x1c/0x5c [ 75.703789][ T4747] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.704686][ T4747] dccp_xmit_packet+0x298/0x460 [ 75.705485][ T4747] dccp_write_xmit+0x118/0x1d0 [ 75.706283][ T4747] dccp_sendmsg+0x510/0x850 [ 75.707000][ T4747] inet_sendmsg+0x154/0x27c [ 75.707731][ T4747] __sys_sendto+0x30c/0x420 [ 75.708477][ T4747] __arm64_sys_sendto+0xe4/0x104 [ 75.709251][ T4747] invoke_syscall+0x98/0x28c [ 75.709957][ T4747] el0_svc_common+0x13c/0x258 [ 75.710675][ T4747] do_el0_svc+0x5c/0x140 [ 75.711343][ T4747] el0_svc+0x78/0x1d0 [ 75.711996][ T4747] el0t_64_sync_handler+0xcc/0xe4 [ 75.712808][ T4747] el0t_64_sync+0x1a0/0x1a4 [ 75.713750][ T4747] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.715417][ T4747] CPU: 1 PID: 4747 Comm: syz.0.43 Not tainted syzkaller #0 [ 75.716502][ T4747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.718052][ T4747] Call trace: [ 75.718576][ T4747] dump_backtrace+0x0/0x458 [ 75.719272][ T4747] show_stack+0x2c/0x3c [ 75.719891][ T4747] __dump_stack+0x30/0x40 [ 75.720572][ T4747] dump_stack_lvl+0xf4/0x15c [ 75.721251][ T4747] dump_stack+0x1c/0x5c [ 75.721911][ T4747] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.722761][ T4747] dccp_xmit_packet+0x298/0x460 [ 75.723510][ T4747] dccp_write_xmit+0x118/0x1d0 [ 75.724304][ T4747] dccp_sendmsg+0x510/0x850 [ 75.725056][ T4747] inet_sendmsg+0x154/0x27c [ 75.725817][ T4747] __sys_sendto+0x30c/0x420 [ 75.726482][ T4747] __arm64_sys_sendto+0xe4/0x104 [ 75.727324][ T4747] invoke_syscall+0x98/0x28c [ 75.728116][ T4747] el0_svc_common+0x13c/0x258 [ 75.728902][ T4747] do_el0_svc+0x5c/0x140 [ 75.729588][ T4747] el0_svc+0x78/0x1d0 [ 75.730287][ T4747] el0t_64_sync_handler+0xcc/0xe4 [ 75.731065][ T4747] el0t_64_sync+0x1a0/0x1a4 [ 75.731917][ T4747] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.733543][ T4747] CPU: 1 PID: 4747 Comm: syz.0.43 Not tainted syzkaller #0 [ 75.734611][ T4747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.736050][ T4747] Call trace: [ 75.736565][ T4747] dump_backtrace+0x0/0x458 [ 75.737268][ T4747] show_stack+0x2c/0x3c [ 75.737906][ T4747] __dump_stack+0x30/0x40 [ 75.738583][ T4747] dump_stack_lvl+0xf4/0x15c [ 75.739322][ T4747] dump_stack+0x1c/0x5c [ 75.740020][ T4747] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.740925][ T4747] dccp_xmit_packet+0x298/0x460 [ 75.741703][ T4747] dccp_write_xmit+0x118/0x1d0 [ 75.742467][ T4747] dccp_sendmsg+0x510/0x850 [ 75.743182][ T4747] inet_sendmsg+0x154/0x27c [ 75.743877][ T4747] __sys_sendto+0x30c/0x420 [ 75.744598][ T4747] __arm64_sys_sendto+0xe4/0x104 [ 75.745313][ T4747] invoke_syscall+0x98/0x28c [ 75.746067][ T4747] el0_svc_common+0x13c/0x258 [ 75.746798][ T4747] do_el0_svc+0x5c/0x140 [ 75.747497][ T4747] el0_svc+0x78/0x1d0 [ 75.748192][ T4747] el0t_64_sync_handler+0xcc/0xe4 [ 75.748973][ T4747] el0t_64_sync+0x1a0/0x1a4 [ 75.749846][ T4747] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.751582][ T4747] CPU: 1 PID: 4747 Comm: syz.0.43 Not tainted syzkaller #0 [ 75.752619][ T4747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.754160][ T4747] Call trace: [ 75.754631][ T4747] dump_backtrace+0x0/0x458 [ 75.755411][ T4747] show_stack+0x2c/0x3c [ 75.756047][ T4747] __dump_stack+0x30/0x40 [ 75.756704][ T4747] dump_stack_lvl+0xf4/0x15c [ 75.757385][ T4747] dump_stack+0x1c/0x5c [ 75.758034][ T4747] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.758907][ T4747] dccp_xmit_packet+0x298/0x460 [ 75.759658][ T4747] dccp_write_xmit+0x118/0x1d0 [ 75.760450][ T4747] dccp_sendmsg+0x510/0x850 [ 75.761168][ T4747] inet_sendmsg+0x154/0x27c [ 75.761877][ T4747] __sys_sendto+0x30c/0x420 [ 75.762651][ T4747] __arm64_sys_sendto+0xe4/0x104 [ 75.763419][ T4747] invoke_syscall+0x98/0x28c [ 75.764146][ T4747] el0_svc_common+0x13c/0x258 [ 75.764948][ T4747] do_el0_svc+0x5c/0x140 [ 75.765646][ T4747] el0_svc+0x78/0x1d0 [ 75.766226][ T4747] el0t_64_sync_handler+0xcc/0xe4 [ 75.767007][ T4747] el0t_64_sync+0x1a0/0x1a4 [ 75.767821][ T4747] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.769760][ T4747] CPU: 1 PID: 4747 Comm: syz.0.43 Not tainted syzkaller #0 [ 75.770804][ T4747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.772374][ T4747] Call trace: [ 75.772839][ T4747] dump_backtrace+0x0/0x458 [ 75.773576][ T4747] show_stack+0x2c/0x3c [ 75.774188][ T4747] __dump_stack+0x30/0x40 [ 75.774852][ T4747] dump_stack_lvl+0xf4/0x15c [ 75.775643][ T4747] dump_stack+0x1c/0x5c [ 75.776257][ T4747] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.777144][ T4747] dccp_xmit_packet+0x298/0x460 [ 75.777864][ T4747] dccp_write_xmit+0x118/0x1d0 [ 75.778577][ T4747] dccp_sendmsg+0x510/0x850 [ 75.779318][ T4747] inet_sendmsg+0x154/0x27c [ 75.780078][ T4747] __sys_sendto+0x30c/0x420 [ 75.780787][ T4747] __arm64_sys_sendto+0xe4/0x104 [ 75.781630][ T4747] invoke_syscall+0x98/0x28c [ 75.782375][ T4747] el0_svc_common+0x13c/0x258 [ 75.783145][ T4747] do_el0_svc+0x5c/0x140 [ 75.783870][ T4747] el0_svc+0x78/0x1d0 [ 75.784498][ T4747] el0t_64_sync_handler+0xcc/0xe4 [ 75.785295][ T4747] el0t_64_sync+0x1a0/0x1a4 [ 75.786116][ T4747] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.787929][ T4747] CPU: 1 PID: 4747 Comm: syz.0.43 Not tainted syzkaller #0 [ 75.789023][ T4747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.790650][ T4747] Call trace: [ 75.791196][ T4747] dump_backtrace+0x0/0x458 [ 75.791913][ T4747] show_stack+0x2c/0x3c [ 75.792577][ T4747] __dump_stack+0x30/0x40 [ 75.793216][ T4747] dump_stack_lvl+0xf4/0x15c [ 75.793975][ T4747] dump_stack+0x1c/0x5c [ 75.794664][ T4747] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.795531][ T4747] dccp_xmit_packet+0x298/0x460 [ 75.796304][ T4747] dccp_write_xmit+0x118/0x1d0 [ 75.797044][ T4747] dccp_sendmsg+0x510/0x850 [ 75.797756][ T4747] inet_sendmsg+0x154/0x27c [ 75.798481][ T4747] __sys_sendto+0x30c/0x420 [ 75.799204][ T4747] __arm64_sys_sendto+0xe4/0x104 [ 75.799991][ T4747] invoke_syscall+0x98/0x28c [ 75.800718][ T4747] el0_svc_common+0x13c/0x258 [ 75.801476][ T4747] do_el0_svc+0x5c/0x140 [ 75.802162][ T4747] el0_svc+0x78/0x1d0 [ 75.802798][ T4747] el0t_64_sync_handler+0xcc/0xe4 [ 75.803616][ T4747] el0t_64_sync+0x1a0/0x1a4 [ 75.804566][ T4747] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.806286][ T4747] CPU: 1 PID: 4747 Comm: syz.0.43 Not tainted syzkaller #0 [ 75.807398][ T4747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.808933][ T4747] Call trace: [ 75.809479][ T4747] dump_backtrace+0x0/0x458 [ 75.810215][ T4747] show_stack+0x2c/0x3c [ 75.810890][ T4747] __dump_stack+0x30/0x40 [ 75.811631][ T4747] dump_stack_lvl+0xf4/0x15c [ 75.812358][ T4747] dump_stack+0x1c/0x5c [ 75.813032][ T4747] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.813949][ T4747] dccp_xmit_packet+0x298/0x460 [ 75.814705][ T4747] dccp_write_xmit+0x118/0x1d0 [ 75.815506][ T4747] dccp_sendmsg+0x510/0x850 [ 75.816191][ T4747] inet_sendmsg+0x154/0x27c [ 75.816967][ T4747] __sys_sendto+0x30c/0x420 [ 75.817806][ T4747] __arm64_sys_sendto+0xe4/0x104 [ 75.818652][ T4747] invoke_syscall+0x98/0x28c [ 75.819444][ T4747] el0_svc_common+0x13c/0x258 [ 75.820200][ T4747] do_el0_svc+0x5c/0x140 [ 75.820887][ T4747] el0_svc+0x78/0x1d0 [ 75.821530][ T4747] el0t_64_sync_handler+0xcc/0xe4 [ 75.822356][ T4747] el0t_64_sync+0x1a0/0x1a4 [ 75.823742][ T4747] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.825444][ T4747] CPU: 1 PID: 4747 Comm: syz.0.43 Not tainted syzkaller #0 [ 75.826521][ T4747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.828112][ T4747] Call trace: [ 75.828681][ T4747] dump_backtrace+0x0/0x458 [ 75.829492][ T4747] show_stack+0x2c/0x3c [ 75.830121][ T4747] __dump_stack+0x30/0x40 [ 75.830817][ T4747] dump_stack_lvl+0xf4/0x15c [ 75.831556][ T4747] dump_stack+0x1c/0x5c [ 75.832183][ T4747] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.833070][ T4747] dccp_xmit_packet+0x298/0x460 [ 75.833812][ T4747] dccp_write_xmit+0x118/0x1d0 [ 75.834654][ T4747] dccp_sendmsg+0x510/0x850 [ 75.835409][ T4747] inet_sendmsg+0x154/0x27c [ 75.836132][ T4747] __sys_sendto+0x30c/0x420 [ 75.836871][ T4747] __arm64_sys_sendto+0xe4/0x104 [ 75.837657][ T4747] invoke_syscall+0x98/0x28c [ 75.838417][ T4747] el0_svc_common+0x13c/0x258 [ 75.839170][ T4747] do_el0_svc+0x5c/0x140 [ 75.839882][ T4747] el0_svc+0x78/0x1d0 [ 75.840530][ T4747] el0t_64_sync_handler+0xcc/0xe4 [ 75.841302][ T4747] el0t_64_sync+0x1a0/0x1a4 [ 75.842238][ T4747] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.844088][ T4747] CPU: 1 PID: 4747 Comm: syz.0.43 Not tainted syzkaller #0 [ 75.845094][ T4747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.846662][ T4747] Call trace: [ 75.847192][ T4747] dump_backtrace+0x0/0x458 [ 75.847957][ T4747] show_stack+0x2c/0x3c [ 75.848654][ T4747] __dump_stack+0x30/0x40 [ 75.849346][ T4747] dump_stack_lvl+0xf4/0x15c [ 75.850109][ T4747] dump_stack+0x1c/0x5c [ 75.850770][ T4747] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.851629][ T4747] dccp_xmit_packet+0x298/0x460 [ 75.852370][ T4747] dccp_write_xmit+0x118/0x1d0 [ 75.853139][ T4747] dccp_sendmsg+0x510/0x850 [ 75.853839][ T4747] inet_sendmsg+0x154/0x27c [ 75.854559][ T4747] __sys_sendto+0x30c/0x420 [ 75.855288][ T4747] __arm64_sys_sendto+0xe4/0x104 [ 75.856055][ T4747] invoke_syscall+0x98/0x28c [ 75.856766][ T4747] el0_svc_common+0x13c/0x258 [ 75.857480][ T4747] do_el0_svc+0x5c/0x140 [ 75.858165][ T4747] el0_svc+0x78/0x1d0 [ 75.858769][ T4747] el0t_64_sync_handler+0xcc/0xe4 [ 75.859612][ T4747] el0t_64_sync+0x1a0/0x1a4 [ 75.860544][ T4747] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.862624][ T4747] CPU: 1 PID: 4747 Comm: syz.0.43 Not tainted syzkaller #0 [ 75.863832][ T4747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.865371][ T4747] Call trace: [ 75.865856][ T4747] dump_backtrace+0x0/0x458 [ 75.866551][ T4747] show_stack+0x2c/0x3c [ 75.867185][ T4747] __dump_stack+0x30/0x40 [ 75.867833][ T4747] dump_stack_lvl+0xf4/0x15c [ 75.868536][ T4747] dump_stack+0x1c/0x5c [ 75.869172][ T4747] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.870071][ T4747] dccp_xmit_packet+0x298/0x460 [ 75.871008][ T4747] dccp_write_xmit+0x118/0x1d0 [ 75.871866][ T4747] dccp_sendmsg+0x510/0x850 [ 75.872604][ T4747] inet_sendmsg+0x154/0x27c [ 75.873310][ T4747] __sys_sendto+0x30c/0x420 [ 75.874108][ T4747] __arm64_sys_sendto+0xe4/0x104 [ 75.875004][ T4747] invoke_syscall+0x98/0x28c [ 75.875711][ T4747] el0_svc_common+0x13c/0x258 [ 75.876548][ T4747] do_el0_svc+0x5c/0x140 [ 75.877306][ T4747] el0_svc+0x78/0x1d0 [ 75.878031][ T4747] el0t_64_sync_handler+0xcc/0xe4 [ 75.878885][ T4747] el0t_64_sync+0x1a0/0x1a4 [ 75.879831][ T4747] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.881602][ T4747] CPU: 1 PID: 4747 Comm: syz.0.43 Not tainted syzkaller #0 [ 75.882651][ T4747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.884213][ T4747] Call trace: [ 75.884724][ T4747] dump_backtrace+0x0/0x458 [ 75.885447][ T4747] show_stack+0x2c/0x3c [ 75.886054][ T4747] __dump_stack+0x30/0x40 [ 75.886768][ T4747] dump_stack_lvl+0xf4/0x15c [ 75.887490][ T4747] dump_stack+0x1c/0x5c [ 75.888277][ T4747] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.889213][ T4747] dccp_xmit_packet+0x298/0x460 [ 75.890103][ T4747] dccp_write_xmit+0x118/0x1d0 [ 75.890934][ T4747] dccp_sendmsg+0x510/0x850 [ 75.891709][ T4747] inet_sendmsg+0x154/0x27c [ 75.892441][ T4747] __sys_sendto+0x30c/0x420 [ 75.893125][ T4747] __arm64_sys_sendto+0xe4/0x104 [ 75.894013][ T4747] invoke_syscall+0x98/0x28c [ 75.894864][ T4747] el0_svc_common+0x13c/0x258 [ 75.895637][ T4747] do_el0_svc+0x5c/0x140 [ 75.896386][ T4747] el0_svc+0x78/0x1d0 [ 75.897070][ T4747] el0t_64_sync_handler+0xcc/0xe4 [ 75.898000][ T4747] el0t_64_sync+0x1a0/0x1a4 [ 75.910317][ T4749] dccp_xmit_packet: Payload too large (65475) for featneg. [ 75.917397][ T4749] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.919244][ T4749] CPU: 1 PID: 4749 Comm: syz.0.44 Not tainted syzkaller #0 [ 75.920301][ T4749] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.921816][ T4749] Call trace: [ 75.922265][ T4749] dump_backtrace+0x0/0x458 [ 75.922926][ T4749] show_stack+0x2c/0x3c [ 75.923626][ T4749] __dump_stack+0x30/0x40 [ 75.924263][ T4749] dump_stack_lvl+0xf4/0x15c [ 75.924909][ T4749] dump_stack+0x1c/0x5c [ 75.925585][ T4749] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.926414][ T4749] dccp_xmit_packet+0x298/0x460 [ 75.927221][ T4749] dccp_write_xmit+0x118/0x1d0 [ 75.927918][ T4749] dccp_sendmsg+0x510/0x850 [ 75.928595][ T4749] inet_sendmsg+0x154/0x27c [ 75.929310][ T4749] __sys_sendto+0x30c/0x420 [ 75.930113][ T4749] __arm64_sys_sendto+0xe4/0x104 [ 75.930998][ T4749] invoke_syscall+0x98/0x28c [ 75.931722][ T4749] el0_svc_common+0x13c/0x258 [ 75.932524][ T4749] do_el0_svc+0x5c/0x140 [ 75.933246][ T4749] el0_svc+0x78/0x1d0 [ 75.933891][ T4749] el0t_64_sync_handler+0xcc/0xe4 [ 75.934854][ T4749] el0t_64_sync+0x1a0/0x1a4 [ 75.935895][ T4749] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.937540][ T4749] CPU: 1 PID: 4749 Comm: syz.0.44 Not tainted syzkaller #0 [ 75.938653][ T4749] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.940254][ T4749] Call trace: [ 75.940774][ T4749] dump_backtrace+0x0/0x458 [ 75.941450][ T4749] show_stack+0x2c/0x3c [ 75.942110][ T4749] __dump_stack+0x30/0x40 [ 75.942815][ T4749] dump_stack_lvl+0xf4/0x15c [ 75.943570][ T4749] dump_stack+0x1c/0x5c [ 75.944262][ T4749] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.945178][ T4749] dccp_xmit_packet+0x298/0x460 [ 75.945877][ T4749] dccp_write_xmit+0x118/0x1d0 [ 75.946658][ T4749] dccp_sendmsg+0x510/0x850 [ 75.947399][ T4749] inet_sendmsg+0x154/0x27c [ 75.948177][ T4749] __sys_sendto+0x30c/0x420 [ 75.948888][ T4749] __arm64_sys_sendto+0xe4/0x104 [ 75.949707][ T4749] invoke_syscall+0x98/0x28c [ 75.950389][ T4749] el0_svc_common+0x13c/0x258 [ 75.951098][ T4749] do_el0_svc+0x5c/0x140 [ 75.951843][ T4749] el0_svc+0x78/0x1d0 [ 75.952477][ T4749] el0t_64_sync_handler+0xcc/0xe4 [ 75.953318][ T4749] el0t_64_sync+0x1a0/0x1a4 [ 75.954718][ T4749] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.956539][ T4749] CPU: 1 PID: 4749 Comm: syz.0.44 Not tainted syzkaller #0 [ 75.957744][ T4749] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.959392][ T4749] Call trace: [ 75.959971][ T4749] dump_backtrace+0x0/0x458 [ 75.960707][ T4749] show_stack+0x2c/0x3c [ 75.961367][ T4749] __dump_stack+0x30/0x40 [ 75.962058][ T4749] dump_stack_lvl+0xf4/0x15c [ 75.962784][ T4749] dump_stack+0x1c/0x5c [ 75.963500][ T4749] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.964397][ T4749] dccp_xmit_packet+0x298/0x460 [ 75.965184][ T4749] dccp_write_xmit+0x118/0x1d0 [ 75.966032][ T4749] dccp_sendmsg+0x510/0x850 [ 75.966837][ T4749] inet_sendmsg+0x154/0x27c [ 75.967626][ T4749] __sys_sendto+0x30c/0x420 [ 75.968357][ T4749] __arm64_sys_sendto+0xe4/0x104 [ 75.969131][ T4749] invoke_syscall+0x98/0x28c [ 75.969866][ T4749] el0_svc_common+0x13c/0x258 [ 75.970601][ T4749] do_el0_svc+0x5c/0x140 [ 75.971266][ T4749] el0_svc+0x78/0x1d0 [ 75.971970][ T4749] el0t_64_sync_handler+0xcc/0xe4 [ 75.972770][ T4749] el0t_64_sync+0x1a0/0x1a4 [ 75.973664][ T4749] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.975352][ T4749] CPU: 1 PID: 4749 Comm: syz.0.44 Not tainted syzkaller #0 [ 75.976468][ T4749] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.977962][ T4749] Call trace: [ 75.978492][ T4749] dump_backtrace+0x0/0x458 [ 75.979263][ T4749] show_stack+0x2c/0x3c [ 75.979890][ T4749] __dump_stack+0x30/0x40 [ 75.980537][ T4749] dump_stack_lvl+0xf4/0x15c [ 75.981249][ T4749] dump_stack+0x1c/0x5c [ 75.981943][ T4749] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 75.982788][ T4749] dccp_xmit_packet+0x298/0x460 [ 75.983547][ T4749] dccp_write_xmit+0x118/0x1d0 [ 75.984339][ T4749] dccp_sendmsg+0x510/0x850 [ 75.985064][ T4749] inet_sendmsg+0x154/0x27c [ 75.985808][ T4749] __sys_sendto+0x30c/0x420 [ 75.986500][ T4749] __arm64_sys_sendto+0xe4/0x104 [ 75.987299][ T4749] invoke_syscall+0x98/0x28c [ 75.988002][ T4749] el0_svc_common+0x13c/0x258 [ 75.988740][ T4749] do_el0_svc+0x5c/0x140 [ 75.989410][ T4749] el0_svc+0x78/0x1d0 [ 75.990061][ T4749] el0t_64_sync_handler+0xcc/0xe4 [ 75.990848][ T4749] el0t_64_sync+0x1a0/0x1a4 [ 75.991660][ T4749] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 75.993303][ T4749] CPU: 1 PID: 4749 Comm: syz.0.44 Not tainted syzkaller #0 [ 75.994418][ T4749] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.995979][ T4749] Call trace: [ 75.996483][ T4749] dump_backtrace+0x0/0x458 [ 75.997157][ T4749] show_stack+0x2c/0x3c [ 75.997769][ T4749] __dump_stack+0x30/0x40 [ 75.998465][ T4749] dump_stack_lvl+0xf4/0x15c [ 75.999165][ T4749] dump_stack+0x1c/0x5c [ 75.999815][ T4749] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.000643][ T4749] dccp_xmit_packet+0x298/0x460 [ 76.001456][ T4749] dccp_write_xmit+0x118/0x1d0 [ 76.002208][ T4749] dccp_sendmsg+0x510/0x850 [ 76.002923][ T4749] inet_sendmsg+0x154/0x27c [ 76.003663][ T4749] __sys_sendto+0x30c/0x420 [ 76.004404][ T4749] __arm64_sys_sendto+0xe4/0x104 [ 76.005215][ T4749] invoke_syscall+0x98/0x28c [ 76.006034][ T4749] el0_svc_common+0x13c/0x258 [ 76.006870][ T4749] do_el0_svc+0x5c/0x140 [ 76.007536][ T4749] el0_svc+0x78/0x1d0 [ 76.008167][ T4749] el0t_64_sync_handler+0xcc/0xe4 [ 76.009069][ T4749] el0t_64_sync+0x1a0/0x1a4 [ 76.010159][ T4749] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.011901][ T4749] CPU: 1 PID: 4749 Comm: syz.0.44 Not tainted syzkaller #0 [ 76.013007][ T4749] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.014578][ T4749] Call trace: [ 76.015147][ T4749] dump_backtrace+0x0/0x458 [ 76.015777][ T4749] show_stack+0x2c/0x3c [ 76.016487][ T4749] __dump_stack+0x30/0x40 [ 76.017177][ T4749] dump_stack_lvl+0xf4/0x15c [ 76.017968][ T4749] dump_stack+0x1c/0x5c [ 76.018644][ T4749] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.019516][ T4749] dccp_xmit_packet+0x298/0x460 [ 76.020364][ T4749] dccp_write_xmit+0x118/0x1d0 [ 76.021315][ T4749] dccp_sendmsg+0x510/0x850 [ 76.022226][ T4749] inet_sendmsg+0x154/0x27c [ 76.023019][ T4749] __sys_sendto+0x30c/0x420 [ 76.023736][ T4749] __arm64_sys_sendto+0xe4/0x104 [ 76.024584][ T4749] invoke_syscall+0x98/0x28c [ 76.025390][ T4749] el0_svc_common+0x13c/0x258 [ 76.026163][ T4749] do_el0_svc+0x5c/0x140 [ 76.026876][ T4749] el0_svc+0x78/0x1d0 [ 76.027597][ T4749] el0t_64_sync_handler+0xcc/0xe4 [ 76.028415][ T4749] el0t_64_sync+0x1a0/0x1a4 [ 76.029315][ T4749] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.031067][ T4749] CPU: 1 PID: 4749 Comm: syz.0.44 Not tainted syzkaller #0 [ 76.032164][ T4749] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.033699][ T4749] Call trace: [ 76.034258][ T4749] dump_backtrace+0x0/0x458 [ 76.035058][ T4749] show_stack+0x2c/0x3c [ 76.035773][ T4749] __dump_stack+0x30/0x40 [ 76.036473][ T4749] dump_stack_lvl+0xf4/0x15c [ 76.037148][ T4749] dump_stack+0x1c/0x5c [ 76.037805][ T4749] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.038673][ T4749] dccp_xmit_packet+0x298/0x460 [ 76.039415][ T4749] dccp_write_xmit+0x118/0x1d0 [ 76.040183][ T4749] dccp_sendmsg+0x510/0x850 [ 76.040908][ T4749] inet_sendmsg+0x154/0x27c [ 76.041638][ T4749] __sys_sendto+0x30c/0x420 [ 76.042385][ T4749] __arm64_sys_sendto+0xe4/0x104 [ 76.043202][ T4749] invoke_syscall+0x98/0x28c [ 76.043957][ T4749] el0_svc_common+0x13c/0x258 [ 76.044714][ T4749] do_el0_svc+0x5c/0x140 [ 76.045462][ T4749] el0_svc+0x78/0x1d0 [ 76.046116][ T4749] el0t_64_sync_handler+0xcc/0xe4 [ 76.046909][ T4749] el0t_64_sync+0x1a0/0x1a4 [ 76.047818][ T4749] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.049880][ T4749] CPU: 1 PID: 4749 Comm: syz.0.44 Not tainted syzkaller #0 [ 76.051061][ T4749] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.052508][ T4749] Call trace: [ 76.053033][ T4749] dump_backtrace+0x0/0x458 [ 76.053725][ T4749] show_stack+0x2c/0x3c [ 76.054282][ T4749] __dump_stack+0x30/0x40 [ 76.054976][ T4749] dump_stack_lvl+0xf4/0x15c [ 76.055696][ T4749] dump_stack+0x1c/0x5c [ 76.056364][ T4749] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.057193][ T4749] dccp_xmit_packet+0x298/0x460 [ 76.057914][ T4749] dccp_write_xmit+0x118/0x1d0 [ 76.058715][ T4749] dccp_sendmsg+0x510/0x850 [ 76.059445][ T4749] inet_sendmsg+0x154/0x27c [ 76.060128][ T4749] __sys_sendto+0x30c/0x420 [ 76.060830][ T4749] __arm64_sys_sendto+0xe4/0x104 [ 76.061558][ T4749] invoke_syscall+0x98/0x28c [ 76.062280][ T4749] el0_svc_common+0x13c/0x258 [ 76.062969][ T4749] do_el0_svc+0x5c/0x140 [ 76.063672][ T4749] el0_svc+0x78/0x1d0 [ 76.064316][ T4749] el0t_64_sync_handler+0xcc/0xe4 [ 76.065111][ T4749] el0t_64_sync+0x1a0/0x1a4 [ 76.066004][ T4749] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.067742][ T4749] CPU: 1 PID: 4749 Comm: syz.0.44 Not tainted syzkaller #0 [ 76.068848][ T4749] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.070525][ T4749] Call trace: [ 76.071047][ T4749] dump_backtrace+0x0/0x458 [ 76.071787][ T4749] show_stack+0x2c/0x3c [ 76.072443][ T4749] __dump_stack+0x30/0x40 [ 76.073165][ T4749] dump_stack_lvl+0xf4/0x15c [ 76.073935][ T4749] dump_stack+0x1c/0x5c [ 76.074589][ T4749] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.075491][ T4749] dccp_xmit_packet+0x298/0x460 [ 76.076296][ T4749] dccp_write_xmit+0x118/0x1d0 [ 76.077055][ T4749] dccp_sendmsg+0x510/0x850 [ 76.077798][ T4749] inet_sendmsg+0x154/0x27c [ 76.078514][ T4749] __sys_sendto+0x30c/0x420 [ 76.079241][ T4749] __arm64_sys_sendto+0xe4/0x104 [ 76.079996][ T4749] invoke_syscall+0x98/0x28c [ 76.080721][ T4749] el0_svc_common+0x13c/0x258 [ 76.081543][ T4749] do_el0_svc+0x5c/0x140 [ 76.082199][ T4749] el0_svc+0x78/0x1d0 [ 76.082792][ T4749] el0t_64_sync_handler+0xcc/0xe4 [ 76.083525][ T4749] el0t_64_sync+0x1a0/0x1a4 [ 76.084451][ T4749] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.086172][ T4749] CPU: 1 PID: 4749 Comm: syz.0.44 Not tainted syzkaller #0 [ 76.087310][ T4749] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.088758][ T4749] Call trace: [ 76.089287][ T4749] dump_backtrace+0x0/0x458 [ 76.090017][ T4749] show_stack+0x2c/0x3c [ 76.090698][ T4749] __dump_stack+0x30/0x40 [ 76.091364][ T4749] dump_stack_lvl+0xf4/0x15c [ 76.092101][ T4749] dump_stack+0x1c/0x5c [ 76.092770][ T4749] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.093652][ T4749] dccp_xmit_packet+0x298/0x460 [ 76.094461][ T4749] dccp_write_xmit+0x118/0x1d0 [ 76.095235][ T4749] dccp_sendmsg+0x510/0x850 [ 76.095919][ T4749] inet_sendmsg+0x154/0x27c [ 76.096584][ T4749] __sys_sendto+0x30c/0x420 [ 76.097263][ T4749] __arm64_sys_sendto+0xe4/0x104 [ 76.098024][ T4749] invoke_syscall+0x98/0x28c [ 76.098737][ T4749] el0_svc_common+0x13c/0x258 [ 76.099504][ T4749] do_el0_svc+0x5c/0x140 [ 76.100215][ T4749] el0_svc+0x78/0x1d0 [ 76.100886][ T4749] el0t_64_sync_handler+0xcc/0xe4 [ 76.101689][ T4749] el0t_64_sync+0x1a0/0x1a4 [ 76.102683][ T4749] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.104374][ T4749] CPU: 1 PID: 4749 Comm: syz.0.44 Not tainted syzkaller #0 [ 76.105519][ T4749] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.107032][ T4749] Call trace: [ 76.107519][ T4749] dump_backtrace+0x0/0x458 [ 76.108192][ T4749] show_stack+0x2c/0x3c [ 76.108850][ T4749] __dump_stack+0x30/0x40 [ 76.109557][ T4749] dump_stack_lvl+0xf4/0x15c [ 76.110274][ T4749] dump_stack+0x1c/0x5c [ 76.110975][ T4749] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.111970][ T4749] dccp_xmit_packet+0x298/0x460 [ 76.112774][ T4749] dccp_write_xmit+0x118/0x1d0 [ 76.113625][ T4749] dccp_sendmsg+0x510/0x850 [ 76.114326][ T4749] inet_sendmsg+0x154/0x27c [ 76.115069][ T4749] __sys_sendto+0x30c/0x420 [ 76.115791][ T4749] __arm64_sys_sendto+0xe4/0x104 [ 76.116545][ T4749] invoke_syscall+0x98/0x28c [ 76.117234][ T4749] el0_svc_common+0x13c/0x258 [ 76.117980][ T4749] do_el0_svc+0x5c/0x140 [ 76.118617][ T4749] el0_svc+0x78/0x1d0 [ 76.119245][ T4749] el0t_64_sync_handler+0xcc/0xe4 [ 76.120018][ T4749] el0t_64_sync+0x1a0/0x1a4 [ 76.120897][ T4749] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.122595][ T4749] CPU: 1 PID: 4749 Comm: syz.0.44 Not tainted syzkaller #0 [ 76.123712][ T4749] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.125276][ T4749] Call trace: [ 76.125748][ T4749] dump_backtrace+0x0/0x458 [ 76.126450][ T4749] show_stack+0x2c/0x3c [ 76.127029][ T4749] __dump_stack+0x30/0x40 [ 76.127673][ T4749] dump_stack_lvl+0xf4/0x15c [ 76.128360][ T4749] dump_stack+0x1c/0x5c [ 76.129047][ T4749] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.129921][ T4749] dccp_xmit_packet+0x298/0x460 [ 76.130760][ T4749] dccp_write_xmit+0x118/0x1d0 [ 76.131611][ T4749] dccp_sendmsg+0x510/0x850 [ 76.132304][ T4749] inet_sendmsg+0x154/0x27c [ 76.132962][ T4749] __sys_sendto+0x30c/0x420 [ 76.133646][ T4749] __arm64_sys_sendto+0xe4/0x104 [ 76.134434][ T4749] invoke_syscall+0x98/0x28c [ 76.135178][ T4749] el0_svc_common+0x13c/0x258 [ 76.135925][ T4749] do_el0_svc+0x5c/0x140 [ 76.136621][ T4749] el0_svc+0x78/0x1d0 [ 76.137251][ T4749] el0t_64_sync_handler+0xcc/0xe4 [ 76.138014][ T4749] el0t_64_sync+0x1a0/0x1a4 [ 76.138975][ T4749] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.140977][ T4749] CPU: 1 PID: 4749 Comm: syz.0.44 Not tainted syzkaller #0 [ 76.142353][ T4749] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.143926][ T4749] Call trace: [ 76.144452][ T4749] dump_backtrace+0x0/0x458 [ 76.145213][ T4749] show_stack+0x2c/0x3c [ 76.145872][ T4749] __dump_stack+0x30/0x40 [ 76.146605][ T4749] dump_stack_lvl+0xf4/0x15c [ 76.147447][ T4749] dump_stack+0x1c/0x5c [ 76.148091][ T4749] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.149010][ T4749] dccp_xmit_packet+0x298/0x460 [ 76.149859][ T4749] dccp_write_xmit+0x118/0x1d0 [ 76.150626][ T4749] dccp_sendmsg+0x510/0x850 [ 76.151376][ T4749] inet_sendmsg+0x154/0x27c [ 76.152134][ T4749] __sys_sendto+0x30c/0x420 [ 76.152816][ T4749] __arm64_sys_sendto+0xe4/0x104 [ 76.153649][ T4749] invoke_syscall+0x98/0x28c [ 76.154380][ T4749] el0_svc_common+0x13c/0x258 [ 76.155126][ T4749] do_el0_svc+0x5c/0x140 [ 76.155795][ T4749] el0_svc+0x78/0x1d0 [ 76.156467][ T4749] el0t_64_sync_handler+0xcc/0xe4 [ 76.157296][ T4749] el0t_64_sync+0x1a0/0x1a4 [ 76.158289][ T4749] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.160220][ T4749] CPU: 1 PID: 4749 Comm: syz.0.44 Not tainted syzkaller #0 [ 76.161353][ T4749] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.162932][ T4749] Call trace: [ 76.163432][ T4749] dump_backtrace+0x0/0x458 [ 76.164109][ T4749] show_stack+0x2c/0x3c [ 76.164758][ T4749] __dump_stack+0x30/0x40 [ 76.165460][ T4749] dump_stack_lvl+0xf4/0x15c [ 76.166141][ T4749] dump_stack+0x1c/0x5c [ 76.166811][ T4749] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.167656][ T4749] dccp_xmit_packet+0x298/0x460 [ 76.168499][ T4749] dccp_write_xmit+0x118/0x1d0 [ 76.169280][ T4749] dccp_sendmsg+0x510/0x850 [ 76.170016][ T4749] inet_sendmsg+0x154/0x27c [ 76.170761][ T4749] __sys_sendto+0x30c/0x420 [ 76.171553][ T4749] __arm64_sys_sendto+0xe4/0x104 [ 76.172354][ T4749] invoke_syscall+0x98/0x28c [ 76.173110][ T4749] el0_svc_common+0x13c/0x258 [ 76.173711][ T4749] do_el0_svc+0x5c/0x140 [ 76.174402][ T4749] el0_svc+0x78/0x1d0 [ 76.175050][ T4749] el0t_64_sync_handler+0xcc/0xe4 [ 76.175828][ T4749] el0t_64_sync+0x1a0/0x1a4 [ 76.176972][ T4749] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.178747][ T4749] CPU: 1 PID: 4749 Comm: syz.0.44 Not tainted syzkaller #0 [ 76.179804][ T4749] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.181317][ T4749] Call trace: [ 76.181836][ T4749] dump_backtrace+0x0/0x458 [ 76.182620][ T4749] show_stack+0x2c/0x3c [ 76.183268][ T4749] __dump_stack+0x30/0x40 [ 76.183950][ T4749] dump_stack_lvl+0xf4/0x15c [ 76.184645][ T4749] dump_stack+0x1c/0x5c [ 76.185288][ T4749] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.186134][ T4749] dccp_xmit_packet+0x298/0x460 [ 76.186879][ T4749] dccp_write_xmit+0x118/0x1d0 [ 76.187558][ T4749] dccp_sendmsg+0x510/0x850 [ 76.188293][ T4749] inet_sendmsg+0x154/0x27c [ 76.189029][ T4749] __sys_sendto+0x30c/0x420 [ 76.189847][ T4749] __arm64_sys_sendto+0xe4/0x104 [ 76.190670][ T4749] invoke_syscall+0x98/0x28c [ 76.191440][ T4749] el0_svc_common+0x13c/0x258 [ 76.192167][ T4749] do_el0_svc+0x5c/0x140 [ 76.192869][ T4749] el0_svc+0x78/0x1d0 [ 76.193572][ T4749] el0t_64_sync_handler+0xcc/0xe4 [ 76.194410][ T4749] el0t_64_sync+0x1a0/0x1a4 [ 76.207635][ T4751] dccp_xmit_packet: Payload too large (65475) for featneg. [ 76.214653][ T4751] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.216183][ T4751] CPU: 1 PID: 4751 Comm: syz.0.45 Not tainted syzkaller #0 [ 76.217267][ T4751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.218857][ T4751] Call trace: [ 76.219380][ T4751] dump_backtrace+0x0/0x458 [ 76.220106][ T4751] show_stack+0x2c/0x3c [ 76.220806][ T4751] __dump_stack+0x30/0x40 [ 76.221505][ T4751] dump_stack_lvl+0xf4/0x15c [ 76.222293][ T4751] dump_stack+0x1c/0x5c [ 76.222947][ T4751] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.223998][ T4751] dccp_xmit_packet+0x298/0x460 [ 76.224907][ T4751] dccp_write_xmit+0x118/0x1d0 [ 76.225720][ T4751] dccp_sendmsg+0x510/0x850 [ 76.226488][ T4751] inet_sendmsg+0x154/0x27c [ 76.227230][ T4751] __sys_sendto+0x30c/0x420 [ 76.227981][ T4751] __arm64_sys_sendto+0xe4/0x104 [ 76.228742][ T4751] invoke_syscall+0x98/0x28c [ 76.229423][ T4751] el0_svc_common+0x13c/0x258 [ 76.230145][ T4751] do_el0_svc+0x5c/0x140 [ 76.230796][ T4751] el0_svc+0x78/0x1d0 [ 76.231404][ T4751] el0t_64_sync_handler+0xcc/0xe4 [ 76.232194][ T4751] el0t_64_sync+0x1a0/0x1a4 [ 76.233396][ T4751] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.235091][ T4751] CPU: 1 PID: 4751 Comm: syz.0.45 Not tainted syzkaller #0 [ 76.236220][ T4751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.237742][ T4751] Call trace: [ 76.238294][ T4751] dump_backtrace+0x0/0x458 [ 76.239107][ T4751] show_stack+0x2c/0x3c [ 76.239789][ T4751] __dump_stack+0x30/0x40 [ 76.240517][ T4751] dump_stack_lvl+0xf4/0x15c [ 76.241314][ T4751] dump_stack+0x1c/0x5c [ 76.242004][ T4751] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.242920][ T4751] dccp_xmit_packet+0x298/0x460 [ 76.243732][ T4751] dccp_write_xmit+0x118/0x1d0 [ 76.244492][ T4751] dccp_sendmsg+0x510/0x850 [ 76.245232][ T4751] inet_sendmsg+0x154/0x27c [ 76.246035][ T4751] __sys_sendto+0x30c/0x420 [ 76.246816][ T4751] __arm64_sys_sendto+0xe4/0x104 [ 76.247614][ T4751] invoke_syscall+0x98/0x28c [ 76.248424][ T4751] el0_svc_common+0x13c/0x258 [ 76.249187][ T4751] do_el0_svc+0x5c/0x140 [ 76.249898][ T4751] el0_svc+0x78/0x1d0 [ 76.250607][ T4751] el0t_64_sync_handler+0xcc/0xe4 [ 76.251459][ T4751] el0t_64_sync+0x1a0/0x1a4 [ 76.252565][ T4751] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.254213][ T4751] CPU: 1 PID: 4751 Comm: syz.0.45 Not tainted syzkaller #0 [ 76.255296][ T4751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.256798][ T4751] Call trace: [ 76.257289][ T4751] dump_backtrace+0x0/0x458 [ 76.257889][ T4751] show_stack+0x2c/0x3c [ 76.258561][ T4751] __dump_stack+0x30/0x40 [ 76.259286][ T4751] dump_stack_lvl+0xf4/0x15c [ 76.259991][ T4751] dump_stack+0x1c/0x5c [ 76.260674][ T4751] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.261559][ T4751] dccp_xmit_packet+0x298/0x460 [ 76.262375][ T4751] dccp_write_xmit+0x118/0x1d0 [ 76.263208][ T4751] dccp_sendmsg+0x510/0x850 [ 76.263998][ T4751] inet_sendmsg+0x154/0x27c [ 76.264758][ T4751] __sys_sendto+0x30c/0x420 [ 76.265470][ T4751] __arm64_sys_sendto+0xe4/0x104 [ 76.266373][ T4751] invoke_syscall+0x98/0x28c [ 76.267113][ T4751] el0_svc_common+0x13c/0x258 [ 76.267879][ T4751] do_el0_svc+0x5c/0x140 [ 76.268589][ T4751] el0_svc+0x78/0x1d0 [ 76.269263][ T4751] el0t_64_sync_handler+0xcc/0xe4 [ 76.270097][ T4751] el0t_64_sync+0x1a0/0x1a4 [ 76.271203][ T4751] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.273064][ T4751] CPU: 1 PID: 4751 Comm: syz.0.45 Not tainted syzkaller #0 [ 76.274161][ T4751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.275695][ T4751] Call trace: [ 76.276160][ T4751] dump_backtrace+0x0/0x458 [ 76.276864][ T4751] show_stack+0x2c/0x3c [ 76.277564][ T4751] __dump_stack+0x30/0x40 [ 76.278208][ T4751] dump_stack_lvl+0xf4/0x15c [ 76.278972][ T4751] dump_stack+0x1c/0x5c [ 76.279649][ T4751] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.280610][ T4751] dccp_xmit_packet+0x298/0x460 [ 76.281430][ T4751] dccp_write_xmit+0x118/0x1d0 [ 76.282167][ T4751] dccp_sendmsg+0x510/0x850 [ 76.282919][ T4751] inet_sendmsg+0x154/0x27c [ 76.283639][ T4751] __sys_sendto+0x30c/0x420 [ 76.284320][ T4751] __arm64_sys_sendto+0xe4/0x104 [ 76.285056][ T4751] invoke_syscall+0x98/0x28c [ 76.285775][ T4751] el0_svc_common+0x13c/0x258 [ 76.286494][ T4751] do_el0_svc+0x5c/0x140 [ 76.287155][ T4751] el0_svc+0x78/0x1d0 [ 76.287767][ T4751] el0t_64_sync_handler+0xcc/0xe4 [ 76.288673][ T4751] el0t_64_sync+0x1a0/0x1a4 [ 76.289661][ T4751] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.291336][ T4751] CPU: 1 PID: 4751 Comm: syz.0.45 Not tainted syzkaller #0 [ 76.292545][ T4751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.293999][ T4751] Call trace: [ 76.294497][ T4751] dump_backtrace+0x0/0x458 [ 76.295223][ T4751] show_stack+0x2c/0x3c [ 76.295932][ T4751] __dump_stack+0x30/0x40 [ 76.296607][ T4751] dump_stack_lvl+0xf4/0x15c [ 76.297275][ T4751] dump_stack+0x1c/0x5c [ 76.297904][ T4751] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.298776][ T4751] dccp_xmit_packet+0x298/0x460 [ 76.299504][ T4751] dccp_write_xmit+0x118/0x1d0 [ 76.300309][ T4751] dccp_sendmsg+0x510/0x850 [ 76.301061][ T4751] inet_sendmsg+0x154/0x27c [ 76.301841][ T4751] __sys_sendto+0x30c/0x420 [ 76.302639][ T4751] __arm64_sys_sendto+0xe4/0x104 [ 76.303475][ T4751] invoke_syscall+0x98/0x28c [ 76.304336][ T4751] el0_svc_common+0x13c/0x258 [ 76.305120][ T4751] do_el0_svc+0x5c/0x140 [ 76.305838][ T4751] el0_svc+0x78/0x1d0 [ 76.306529][ T4751] el0t_64_sync_handler+0xcc/0xe4 [ 76.307430][ T4751] el0t_64_sync+0x1a0/0x1a4 [ 76.308517][ T4751] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.310212][ T4751] CPU: 1 PID: 4751 Comm: syz.0.45 Not tainted syzkaller #0 [ 76.311308][ T4751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.312770][ T4751] Call trace: [ 76.313353][ T4751] dump_backtrace+0x0/0x458 [ 76.314045][ T4751] show_stack+0x2c/0x3c [ 76.314650][ T4751] __dump_stack+0x30/0x40 [ 76.315299][ T4751] dump_stack_lvl+0xf4/0x15c [ 76.315909][ T4751] dump_stack+0x1c/0x5c [ 76.316528][ T4751] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.317457][ T4751] dccp_xmit_packet+0x298/0x460 [ 76.318143][ T4751] dccp_write_xmit+0x118/0x1d0 [ 76.318946][ T4751] dccp_sendmsg+0x510/0x850 [ 76.319663][ T4751] inet_sendmsg+0x154/0x27c [ 76.320400][ T4751] __sys_sendto+0x30c/0x420 [ 76.321143][ T4751] __arm64_sys_sendto+0xe4/0x104 [ 76.322054][ T4751] invoke_syscall+0x98/0x28c [ 76.322785][ T4751] el0_svc_common+0x13c/0x258 [ 76.323611][ T4751] do_el0_svc+0x5c/0x140 [ 76.324259][ T4751] el0_svc+0x78/0x1d0 [ 76.324878][ T4751] el0t_64_sync_handler+0xcc/0xe4 [ 76.325674][ T4751] el0t_64_sync+0x1a0/0x1a4 [ 76.326514][ T4751] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.328251][ T4751] CPU: 1 PID: 4751 Comm: syz.0.45 Not tainted syzkaller #0 [ 76.329439][ T4751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.330958][ T4751] Call trace: [ 76.331454][ T4751] dump_backtrace+0x0/0x458 [ 76.332178][ T4751] show_stack+0x2c/0x3c [ 76.332809][ T4751] __dump_stack+0x30/0x40 [ 76.333469][ T4751] dump_stack_lvl+0xf4/0x15c [ 76.334230][ T4751] dump_stack+0x1c/0x5c [ 76.334851][ T4751] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.335661][ T4751] dccp_xmit_packet+0x298/0x460 [ 76.336378][ T4751] dccp_write_xmit+0x118/0x1d0 [ 76.337141][ T4751] dccp_sendmsg+0x510/0x850 [ 76.337810][ T4751] inet_sendmsg+0x154/0x27c [ 76.338543][ T4751] __sys_sendto+0x30c/0x420 [ 76.339281][ T4751] __arm64_sys_sendto+0xe4/0x104 [ 76.340014][ T4751] invoke_syscall+0x98/0x28c [ 76.340713][ T4751] el0_svc_common+0x13c/0x258 [ 76.341499][ T4751] do_el0_svc+0x5c/0x140 [ 76.342165][ T4751] el0_svc+0x78/0x1d0 [ 76.342801][ T4751] el0t_64_sync_handler+0xcc/0xe4 [ 76.343616][ T4751] el0t_64_sync+0x1a0/0x1a4 [ 76.344499][ T4751] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.346090][ T4751] CPU: 1 PID: 4751 Comm: syz.0.45 Not tainted syzkaller #0 [ 76.347083][ T4751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.348616][ T4751] Call trace: [ 76.349111][ T4751] dump_backtrace+0x0/0x458 [ 76.349828][ T4751] show_stack+0x2c/0x3c [ 76.350425][ T4751] __dump_stack+0x30/0x40 [ 76.351175][ T4751] dump_stack_lvl+0xf4/0x15c [ 76.351967][ T4751] dump_stack+0x1c/0x5c [ 76.352684][ T4751] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.353658][ T4751] dccp_xmit_packet+0x298/0x460 [ 76.354414][ T4751] dccp_write_xmit+0x118/0x1d0 [ 76.355164][ T4751] dccp_sendmsg+0x510/0x850 [ 76.355878][ T4751] inet_sendmsg+0x154/0x27c [ 76.356574][ T4751] __sys_sendto+0x30c/0x420 [ 76.357288][ T4751] __arm64_sys_sendto+0xe4/0x104 [ 76.358082][ T4751] invoke_syscall+0x98/0x28c [ 76.358751][ T4751] el0_svc_common+0x13c/0x258 [ 76.359471][ T4751] do_el0_svc+0x5c/0x140 [ 76.360177][ T4751] el0_svc+0x78/0x1d0 [ 76.360870][ T4751] el0t_64_sync_handler+0xcc/0xe4 [ 76.361656][ T4751] el0t_64_sync+0x1a0/0x1a4 [ 76.362720][ T4751] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.364294][ T4751] CPU: 1 PID: 4751 Comm: syz.0.45 Not tainted syzkaller #0 [ 76.365341][ T4751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.366983][ T4751] Call trace: [ 76.367445][ T4751] dump_backtrace+0x0/0x458 [ 76.368178][ T4751] show_stack+0x2c/0x3c [ 76.368828][ T4751] __dump_stack+0x30/0x40 [ 76.369534][ T4751] dump_stack_lvl+0xf4/0x15c [ 76.370223][ T4751] dump_stack+0x1c/0x5c [ 76.370925][ T4751] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.371885][ T4751] dccp_xmit_packet+0x298/0x460 [ 76.372693][ T4751] dccp_write_xmit+0x118/0x1d0 [ 76.373458][ T4751] dccp_sendmsg+0x510/0x850 [ 76.374180][ T4751] inet_sendmsg+0x154/0x27c [ 76.374926][ T4751] __sys_sendto+0x30c/0x420 [ 76.375655][ T4751] __arm64_sys_sendto+0xe4/0x104 [ 76.376512][ T4751] invoke_syscall+0x98/0x28c [ 76.377370][ T4751] el0_svc_common+0x13c/0x258 [ 76.378106][ T4751] do_el0_svc+0x5c/0x140 [ 76.378790][ T4751] el0_svc+0x78/0x1d0 [ 76.379430][ T4751] el0t_64_sync_handler+0xcc/0xe4 [ 76.380211][ T4751] el0t_64_sync+0x1a0/0x1a4 [ 76.381898][ T4751] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.383600][ T4751] CPU: 1 PID: 4751 Comm: syz.0.45 Not tainted syzkaller #0 [ 76.384701][ T4751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.386174][ T4751] Call trace: [ 76.386685][ T4751] dump_backtrace+0x0/0x458 [ 76.387331][ T4751] show_stack+0x2c/0x3c [ 76.387919][ T4751] __dump_stack+0x30/0x40 [ 76.388615][ T4751] dump_stack_lvl+0xf4/0x15c [ 76.389378][ T4751] dump_stack+0x1c/0x5c [ 76.390020][ T4751] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.390944][ T4751] dccp_xmit_packet+0x298/0x460 [ 76.391732][ T4751] dccp_write_xmit+0x118/0x1d0 [ 76.392489][ T4751] dccp_sendmsg+0x510/0x850 [ 76.393230][ T4751] inet_sendmsg+0x154/0x27c [ 76.393911][ T4751] __sys_sendto+0x30c/0x420 [ 76.394664][ T4751] __arm64_sys_sendto+0xe4/0x104 [ 76.395515][ T4751] invoke_syscall+0x98/0x28c [ 76.396248][ T4751] el0_svc_common+0x13c/0x258 [ 76.396974][ T4751] do_el0_svc+0x5c/0x140 [ 76.397651][ T4751] el0_svc+0x78/0x1d0 [ 76.398270][ T4751] el0t_64_sync_handler+0xcc/0xe4 [ 76.399058][ T4751] el0t_64_sync+0x1a0/0x1a4 [ 76.399983][ T4751] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.401651][ T4751] CPU: 1 PID: 4751 Comm: syz.0.45 Not tainted syzkaller #0 [ 76.402697][ T4751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.404209][ T4751] Call trace: [ 76.404735][ T4751] dump_backtrace+0x0/0x458 [ 76.405457][ T4751] show_stack+0x2c/0x3c [ 76.406110][ T4751] __dump_stack+0x30/0x40 [ 76.406757][ T4751] dump_stack_lvl+0xf4/0x15c [ 76.407464][ T4751] dump_stack+0x1c/0x5c [ 76.408197][ T4751] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.409130][ T4751] dccp_xmit_packet+0x298/0x460 [ 76.409962][ T4751] dccp_write_xmit+0x118/0x1d0 [ 76.410755][ T4751] dccp_sendmsg+0x510/0x850 [ 76.411544][ T4751] inet_sendmsg+0x154/0x27c [ 76.412310][ T4751] __sys_sendto+0x30c/0x420 [ 76.413061][ T4751] __arm64_sys_sendto+0xe4/0x104 [ 76.414025][ T4751] invoke_syscall+0x98/0x28c [ 76.414853][ T4751] el0_svc_common+0x13c/0x258 [ 76.415693][ T4751] do_el0_svc+0x5c/0x140 [ 76.416420][ T4751] el0_svc+0x78/0x1d0 [ 76.417095][ T4751] el0t_64_sync_handler+0xcc/0xe4 [ 76.417879][ T4751] el0t_64_sync+0x1a0/0x1a4 [ 76.418902][ T4751] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.420655][ T4751] CPU: 1 PID: 4751 Comm: syz.0.45 Not tainted syzkaller #0 [ 76.421754][ T4751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.423268][ T4751] Call trace: [ 76.423806][ T4751] dump_backtrace+0x0/0x458 [ 76.424459][ T4751] show_stack+0x2c/0x3c [ 76.425141][ T4751] __dump_stack+0x30/0x40 [ 76.425828][ T4751] dump_stack_lvl+0xf4/0x15c [ 76.426479][ T4751] dump_stack+0x1c/0x5c [ 76.427093][ T4751] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.427912][ T4751] dccp_xmit_packet+0x298/0x460 [ 76.428653][ T4751] dccp_write_xmit+0x118/0x1d0 [ 76.429385][ T4751] dccp_sendmsg+0x510/0x850 [ 76.430132][ T4751] inet_sendmsg+0x154/0x27c [ 76.430880][ T4751] __sys_sendto+0x30c/0x420 [ 76.431613][ T4751] __arm64_sys_sendto+0xe4/0x104 [ 76.432395][ T4751] invoke_syscall+0x98/0x28c [ 76.433178][ T4751] el0_svc_common+0x13c/0x258 [ 76.433917][ T4751] do_el0_svc+0x5c/0x140 [ 76.434594][ T4751] el0_svc+0x78/0x1d0 [ 76.435190][ T4751] el0t_64_sync_handler+0xcc/0xe4 [ 76.436040][ T4751] el0t_64_sync+0x1a0/0x1a4 [ 76.437073][ T4751] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.438819][ T4751] CPU: 1 PID: 4751 Comm: syz.0.45 Not tainted syzkaller #0 [ 76.439840][ T4751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.441387][ T4751] Call trace: [ 76.441927][ T4751] dump_backtrace+0x0/0x458 [ 76.442624][ T4751] show_stack+0x2c/0x3c [ 76.443201][ T4751] __dump_stack+0x30/0x40 [ 76.443772][ T4751] dump_stack_lvl+0xf4/0x15c [ 76.444446][ T4751] dump_stack+0x1c/0x5c [ 76.445064][ T4751] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.445856][ T4751] dccp_xmit_packet+0x298/0x460 [ 76.446559][ T4751] dccp_write_xmit+0x118/0x1d0 [ 76.447247][ T4751] dccp_sendmsg+0x510/0x850 [ 76.447887][ T4751] inet_sendmsg+0x154/0x27c [ 76.448559][ T4751] __sys_sendto+0x30c/0x420 [ 76.449265][ T4751] __arm64_sys_sendto+0xe4/0x104 [ 76.450005][ T4751] invoke_syscall+0x98/0x28c [ 76.450718][ T4751] el0_svc_common+0x13c/0x258 [ 76.451526][ T4751] do_el0_svc+0x5c/0x140 [ 76.452254][ T4751] el0_svc+0x78/0x1d0 [ 76.452925][ T4751] el0t_64_sync_handler+0xcc/0xe4 [ 76.453863][ T4751] el0t_64_sync+0x1a0/0x1a4 [ 76.454764][ T4751] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.456482][ T4751] CPU: 1 PID: 4751 Comm: syz.0.45 Not tainted syzkaller #0 [ 76.457664][ T4751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.459335][ T4751] Call trace: [ 76.459876][ T4751] dump_backtrace+0x0/0x458 [ 76.460549][ T4751] show_stack+0x2c/0x3c [ 76.461230][ T4751] __dump_stack+0x30/0x40 [ 76.461931][ T4751] dump_stack_lvl+0xf4/0x15c [ 76.462630][ T4751] dump_stack+0x1c/0x5c [ 76.463297][ T4751] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.464164][ T4751] dccp_xmit_packet+0x298/0x460 [ 76.465002][ T4751] dccp_write_xmit+0x118/0x1d0 [ 76.465857][ T4751] dccp_sendmsg+0x510/0x850 [ 76.466585][ T4751] inet_sendmsg+0x154/0x27c [ 76.467371][ T4751] __sys_sendto+0x30c/0x420 [ 76.468101][ T4751] __arm64_sys_sendto+0xe4/0x104 [ 76.468890][ T4751] invoke_syscall+0x98/0x28c [ 76.469612][ T4751] el0_svc_common+0x13c/0x258 [ 76.470357][ T4751] do_el0_svc+0x5c/0x140 [ 76.471020][ T4751] el0_svc+0x78/0x1d0 [ 76.471681][ T4751] el0t_64_sync_handler+0xcc/0xe4 [ 76.472487][ T4751] el0t_64_sync+0x1a0/0x1a4 [ 76.473359][ T4751] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.475152][ T4751] CPU: 1 PID: 4751 Comm: syz.0.45 Not tainted syzkaller #0 [ 76.476257][ T4751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.477860][ T4751] Call trace: [ 76.478350][ T4751] dump_backtrace+0x0/0x458 [ 76.479027][ T4751] show_stack+0x2c/0x3c [ 76.479721][ T4751] __dump_stack+0x30/0x40 [ 76.480464][ T4751] dump_stack_lvl+0xf4/0x15c [ 76.481188][ T4751] dump_stack+0x1c/0x5c [ 76.481847][ T4751] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.482769][ T4751] dccp_xmit_packet+0x298/0x460 [ 76.483536][ T4751] dccp_write_xmit+0x118/0x1d0 [ 76.484277][ T4751] dccp_sendmsg+0x510/0x850 [ 76.484994][ T4751] inet_sendmsg+0x154/0x27c [ 76.485752][ T4751] __sys_sendto+0x30c/0x420 [ 76.486521][ T4751] __arm64_sys_sendto+0xe4/0x104 [ 76.487301][ T4751] invoke_syscall+0x98/0x28c [ 76.488095][ T4751] el0_svc_common+0x13c/0x258 [ 76.488798][ T4751] do_el0_svc+0x5c/0x140 [ 76.489518][ T4751] el0_svc+0x78/0x1d0 [ 76.490193][ T4751] el0t_64_sync_handler+0xcc/0xe4 [ 76.491021][ T4751] el0t_64_sync+0x1a0/0x1a4 [ 76.491890][ T4751] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.493549][ T4751] CPU: 1 PID: 4751 Comm: syz.0.45 Not tainted syzkaller #0 [ 76.494602][ T4751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.496278][ T4751] Call trace: [ 76.496764][ T4751] dump_backtrace+0x0/0x458 [ 76.497404][ T4751] show_stack+0x2c/0x3c [ 76.498048][ T4751] __dump_stack+0x30/0x40 [ 76.498742][ T4751] dump_stack_lvl+0xf4/0x15c [ 76.499493][ T4751] dump_stack+0x1c/0x5c [ 76.500215][ T4751] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.501064][ T4751] dccp_xmit_packet+0x298/0x460 [ 76.501911][ T4751] dccp_write_xmit+0x118/0x1d0 [ 76.502657][ T4751] dccp_sendmsg+0x510/0x850 [ 76.503389][ T4751] inet_sendmsg+0x154/0x27c [ 76.504116][ T4751] __sys_sendto+0x30c/0x420 [ 76.504850][ T4751] __arm64_sys_sendto+0xe4/0x104 [ 76.505713][ T4751] invoke_syscall+0x98/0x28c [ 76.506558][ T4751] el0_svc_common+0x13c/0x258 [ 76.507354][ T4751] do_el0_svc+0x5c/0x140 [ 76.508089][ T4751] el0_svc+0x78/0x1d0 [ 76.508779][ T4751] el0t_64_sync_handler+0xcc/0xe4 [ 76.509608][ T4751] el0t_64_sync+0x1a0/0x1a4 [ 76.526531][ T4753] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.528417][ T4753] CPU: 1 PID: 4753 Comm: syz.0.46 Not tainted syzkaller #0 [ 76.529463][ T4753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.530956][ T4753] Call trace: [ 76.531428][ T4753] dump_backtrace+0x0/0x458 [ 76.532171][ T4753] show_stack+0x2c/0x3c [ 76.532775][ T4753] __dump_stack+0x30/0x40 [ 76.533482][ T4753] dump_stack_lvl+0xf4/0x15c [ 76.534164][ T4753] dump_stack+0x1c/0x5c [ 76.534864][ T4753] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.535747][ T4753] dccp_xmit_packet+0x298/0x460 [ 76.536487][ T4753] dccp_write_xmit+0x118/0x1d0 [ 76.537155][ T4753] dccp_sendmsg+0x510/0x850 [ 76.537832][ T4753] inet_sendmsg+0x154/0x27c [ 76.538576][ T4753] __sys_sendto+0x30c/0x420 [ 76.539336][ T4753] __arm64_sys_sendto+0xe4/0x104 [ 76.540070][ T4753] invoke_syscall+0x98/0x28c [ 76.540829][ T4753] el0_svc_common+0x13c/0x258 [ 76.541594][ T4753] do_el0_svc+0x5c/0x140 [ 76.542274][ T4753] el0_svc+0x78/0x1d0 [ 76.542904][ T4753] el0t_64_sync_handler+0xcc/0xe4 [ 76.543668][ T4753] el0t_64_sync+0x1a0/0x1a4 [ 76.544634][ T4753] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.546268][ T4753] CPU: 1 PID: 4753 Comm: syz.0.46 Not tainted syzkaller #0 [ 76.547366][ T4753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.548934][ T4753] Call trace: [ 76.549468][ T4753] dump_backtrace+0x0/0x458 [ 76.550345][ T4753] show_stack+0x2c/0x3c [ 76.551132][ T4753] __dump_stack+0x30/0x40 [ 76.551852][ T4753] dump_stack_lvl+0xf4/0x15c [ 76.552566][ T4753] dump_stack+0x1c/0x5c [ 76.553224][ T4753] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.554052][ T4753] dccp_xmit_packet+0x298/0x460 [ 76.554849][ T4753] dccp_write_xmit+0x118/0x1d0 [ 76.555615][ T4753] dccp_sendmsg+0x510/0x850 [ 76.556386][ T4753] inet_sendmsg+0x154/0x27c [ 76.557062][ T4753] __sys_sendto+0x30c/0x420 [ 76.557740][ T4753] __arm64_sys_sendto+0xe4/0x104 [ 76.558485][ T4753] invoke_syscall+0x98/0x28c [ 76.559179][ T4753] el0_svc_common+0x13c/0x258 [ 76.559913][ T4753] do_el0_svc+0x5c/0x140 [ 76.560592][ T4753] el0_svc+0x78/0x1d0 [ 76.561231][ T4753] el0t_64_sync_handler+0xcc/0xe4 [ 76.562003][ T4753] el0t_64_sync+0x1a0/0x1a4 [ 76.563403][ T4753] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.565073][ T4753] CPU: 1 PID: 4753 Comm: syz.0.46 Not tainted syzkaller #0 [ 76.566187][ T4753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.567754][ T4753] Call trace: [ 76.568273][ T4753] dump_backtrace+0x0/0x458 [ 76.569000][ T4753] show_stack+0x2c/0x3c [ 76.569650][ T4753] __dump_stack+0x30/0x40 [ 76.570389][ T4753] dump_stack_lvl+0xf4/0x15c [ 76.571227][ T4753] dump_stack+0x1c/0x5c [ 76.571926][ T4753] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.572752][ T4753] dccp_xmit_packet+0x298/0x460 [ 76.573493][ T4753] dccp_write_xmit+0x118/0x1d0 [ 76.574295][ T4753] dccp_sendmsg+0x510/0x850 [ 76.575032][ T4753] inet_sendmsg+0x154/0x27c [ 76.575749][ T4753] __sys_sendto+0x30c/0x420 [ 76.576496][ T4753] __arm64_sys_sendto+0xe4/0x104 [ 76.577392][ T4753] invoke_syscall+0x98/0x28c [ 76.578226][ T4753] el0_svc_common+0x13c/0x258 [ 76.579089][ T4753] do_el0_svc+0x5c/0x140 [ 76.579757][ T4753] el0_svc+0x78/0x1d0 [ 76.580390][ T4753] el0t_64_sync_handler+0xcc/0xe4 [ 76.581300][ T4753] el0t_64_sync+0x1a0/0x1a4 [ 76.582359][ T4753] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.584204][ T4753] CPU: 1 PID: 4753 Comm: syz.0.46 Not tainted syzkaller #0 [ 76.585302][ T4753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.586881][ T4753] Call trace: [ 76.587383][ T4753] dump_backtrace+0x0/0x458 [ 76.588048][ T4753] show_stack+0x2c/0x3c [ 76.588714][ T4753] __dump_stack+0x30/0x40 [ 76.589442][ T4753] dump_stack_lvl+0xf4/0x15c [ 76.590157][ T4753] dump_stack+0x1c/0x5c [ 76.590834][ T4753] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.591755][ T4753] dccp_xmit_packet+0x298/0x460 [ 76.592555][ T4753] dccp_write_xmit+0x118/0x1d0 [ 76.593370][ T4753] dccp_sendmsg+0x510/0x850 [ 76.594126][ T4753] inet_sendmsg+0x154/0x27c [ 76.594963][ T4753] __sys_sendto+0x30c/0x420 [ 76.595752][ T4753] __arm64_sys_sendto+0xe4/0x104 [ 76.596595][ T4753] invoke_syscall+0x98/0x28c [ 76.597358][ T4753] el0_svc_common+0x13c/0x258 [ 76.598129][ T4753] do_el0_svc+0x5c/0x140 [ 76.598767][ T4753] el0_svc+0x78/0x1d0 [ 76.599389][ T4753] el0t_64_sync_handler+0xcc/0xe4 [ 76.600181][ T4753] el0t_64_sync+0x1a0/0x1a4 [ 76.601165][ T4753] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.603066][ T4753] CPU: 1 PID: 4753 Comm: syz.0.46 Not tainted syzkaller #0 [ 76.604290][ T4753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.605826][ T4753] Call trace: [ 76.606357][ T4753] dump_backtrace+0x0/0x458 [ 76.607056][ T4753] show_stack+0x2c/0x3c [ 76.607663][ T4753] __dump_stack+0x30/0x40 [ 76.608349][ T4753] dump_stack_lvl+0xf4/0x15c [ 76.609138][ T4753] dump_stack+0x1c/0x5c [ 76.609811][ T4753] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.610662][ T4753] dccp_xmit_packet+0x298/0x460 [ 76.611444][ T4753] dccp_write_xmit+0x118/0x1d0 [ 76.612298][ T4753] dccp_sendmsg+0x510/0x850 [ 76.613122][ T4753] inet_sendmsg+0x154/0x27c [ 76.613990][ T4753] __sys_sendto+0x30c/0x420 [ 76.614776][ T4753] __arm64_sys_sendto+0xe4/0x104 [ 76.615659][ T4753] invoke_syscall+0x98/0x28c [ 76.616554][ T4753] el0_svc_common+0x13c/0x258 [ 76.617370][ T4753] do_el0_svc+0x5c/0x140 [ 76.618039][ T4753] el0_svc+0x78/0x1d0 [ 76.618742][ T4753] el0t_64_sync_handler+0xcc/0xe4 [ 76.619613][ T4753] el0t_64_sync+0x1a0/0x1a4 [ 76.620854][ T4753] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.622503][ T4753] CPU: 1 PID: 4753 Comm: syz.0.46 Not tainted syzkaller #0 [ 76.623652][ T4753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.625120][ T4753] Call trace: [ 76.625614][ T4753] dump_backtrace+0x0/0x458 [ 76.626303][ T4753] show_stack+0x2c/0x3c [ 76.626949][ T4753] __dump_stack+0x30/0x40 [ 76.627602][ T4753] dump_stack_lvl+0xf4/0x15c [ 76.628354][ T4753] dump_stack+0x1c/0x5c [ 76.629060][ T4753] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.630040][ T4753] dccp_xmit_packet+0x298/0x460 [ 76.630876][ T4753] dccp_write_xmit+0x118/0x1d0 [ 76.631637][ T4753] dccp_sendmsg+0x510/0x850 [ 76.632384][ T4753] inet_sendmsg+0x154/0x27c [ 76.633150][ T4753] __sys_sendto+0x30c/0x420 [ 76.633822][ T4753] __arm64_sys_sendto+0xe4/0x104 [ 76.634629][ T4753] invoke_syscall+0x98/0x28c [ 76.635360][ T4753] el0_svc_common+0x13c/0x258 [ 76.636128][ T4753] do_el0_svc+0x5c/0x140 [ 76.636813][ T4753] el0_svc+0x78/0x1d0 [ 76.637452][ T4753] el0t_64_sync_handler+0xcc/0xe4 [ 76.638262][ T4753] el0t_64_sync+0x1a0/0x1a4 [ 76.639840][ T4753] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.641370][ T4753] CPU: 1 PID: 4753 Comm: syz.0.46 Not tainted syzkaller #0 [ 76.642399][ T4753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.643811][ T4753] Call trace: [ 76.644275][ T4753] dump_backtrace+0x0/0x458 [ 76.644918][ T4753] show_stack+0x2c/0x3c [ 76.645502][ T4753] __dump_stack+0x30/0x40 [ 76.646118][ T4753] dump_stack_lvl+0xf4/0x15c [ 76.646843][ T4753] dump_stack+0x1c/0x5c [ 76.647457][ T4753] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.648257][ T4753] dccp_xmit_packet+0x298/0x460 [ 76.649008][ T4753] dccp_write_xmit+0x118/0x1d0 [ 76.649763][ T4753] dccp_sendmsg+0x510/0x850 [ 76.650490][ T4753] inet_sendmsg+0x154/0x27c [ 76.651215][ T4753] __sys_sendto+0x30c/0x420 [ 76.651882][ T4753] __arm64_sys_sendto+0xe4/0x104 [ 76.652694][ T4753] invoke_syscall+0x98/0x28c [ 76.653444][ T4753] el0_svc_common+0x13c/0x258 [ 76.654174][ T4753] do_el0_svc+0x5c/0x140 [ 76.654887][ T4753] el0_svc+0x78/0x1d0 [ 76.655558][ T4753] el0t_64_sync_handler+0xcc/0xe4 [ 76.656353][ T4753] el0t_64_sync+0x1a0/0x1a4 [ 76.657527][ T4753] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.659517][ T4753] CPU: 1 PID: 4753 Comm: syz.0.46 Not tainted syzkaller #0 [ 76.660671][ T4753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.662104][ T4753] Call trace: [ 76.662566][ T4753] dump_backtrace+0x0/0x458 [ 76.663254][ T4753] show_stack+0x2c/0x3c [ 76.663927][ T4753] __dump_stack+0x30/0x40 [ 76.664645][ T4753] dump_stack_lvl+0xf4/0x15c [ 76.665492][ T4753] dump_stack+0x1c/0x5c [ 76.666208][ T4753] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.667059][ T4753] dccp_xmit_packet+0x298/0x460 [ 76.667790][ T4753] dccp_write_xmit+0x118/0x1d0 [ 76.668594][ T4753] dccp_sendmsg+0x510/0x850 [ 76.669419][ T4753] inet_sendmsg+0x154/0x27c [ 76.670173][ T4753] __sys_sendto+0x30c/0x420 [ 76.670940][ T4753] __arm64_sys_sendto+0xe4/0x104 [ 76.671674][ T4753] invoke_syscall+0x98/0x28c [ 76.672397][ T4753] el0_svc_common+0x13c/0x258 [ 76.673130][ T4753] do_el0_svc+0x5c/0x140 [ 76.673812][ T4753] el0_svc+0x78/0x1d0 [ 76.674422][ T4753] el0t_64_sync_handler+0xcc/0xe4 [ 76.675146][ T4753] el0t_64_sync+0x1a0/0x1a4 [ 76.675998][ T4753] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.677615][ T4753] CPU: 1 PID: 4753 Comm: syz.0.46 Not tainted syzkaller #0 [ 76.678676][ T4753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.680234][ T4753] Call trace: [ 76.680765][ T4753] dump_backtrace+0x0/0x458 [ 76.681523][ T4753] show_stack+0x2c/0x3c [ 76.682177][ T4753] __dump_stack+0x30/0x40 [ 76.682868][ T4753] dump_stack_lvl+0xf4/0x15c [ 76.683643][ T4753] dump_stack+0x1c/0x5c [ 76.684305][ T4753] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.685230][ T4753] dccp_xmit_packet+0x298/0x460 [ 76.686041][ T4753] dccp_write_xmit+0x118/0x1d0 [ 76.686804][ T4753] dccp_sendmsg+0x510/0x850 [ 76.687519][ T4753] inet_sendmsg+0x154/0x27c [ 76.688201][ T4753] __sys_sendto+0x30c/0x420 [ 76.688946][ T4753] __arm64_sys_sendto+0xe4/0x104 [ 76.689695][ T4753] invoke_syscall+0x98/0x28c [ 76.690420][ T4753] el0_svc_common+0x13c/0x258 [ 76.691155][ T4753] do_el0_svc+0x5c/0x140 [ 76.691842][ T4753] el0_svc+0x78/0x1d0 [ 76.692588][ T4753] el0t_64_sync_handler+0xcc/0xe4 [ 76.693441][ T4753] el0t_64_sync+0x1a0/0x1a4 [ 76.694395][ T4753] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.696056][ T4753] CPU: 1 PID: 4753 Comm: syz.0.46 Not tainted syzkaller #0 [ 76.697140][ T4753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.698801][ T4753] Call trace: [ 76.699303][ T4753] dump_backtrace+0x0/0x458 [ 76.700047][ T4753] show_stack+0x2c/0x3c [ 76.700747][ T4753] __dump_stack+0x30/0x40 [ 76.701407][ T4753] dump_stack_lvl+0xf4/0x15c [ 76.702113][ T4753] dump_stack+0x1c/0x5c [ 76.702772][ T4753] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.703622][ T4753] dccp_xmit_packet+0x298/0x460 [ 76.704325][ T4753] dccp_write_xmit+0x118/0x1d0 [ 76.705056][ T4753] dccp_sendmsg+0x510/0x850 [ 76.705812][ T4753] inet_sendmsg+0x154/0x27c [ 76.706544][ T4753] __sys_sendto+0x30c/0x420 [ 76.707274][ T4753] __arm64_sys_sendto+0xe4/0x104 [ 76.708099][ T4753] invoke_syscall+0x98/0x28c [ 76.708782][ T4753] el0_svc_common+0x13c/0x258 [ 76.709538][ T4753] do_el0_svc+0x5c/0x140 [ 76.710216][ T4753] el0_svc+0x78/0x1d0 [ 76.710860][ T4753] el0t_64_sync_handler+0xcc/0xe4 [ 76.711670][ T4753] el0t_64_sync+0x1a0/0x1a4 [ 76.712596][ T4753] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.714270][ T4753] CPU: 1 PID: 4753 Comm: syz.0.46 Not tainted syzkaller #0 [ 76.715334][ T4753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.716875][ T4753] Call trace: [ 76.717395][ T4753] dump_backtrace+0x0/0x458 [ 76.718054][ T4753] show_stack+0x2c/0x3c [ 76.718699][ T4753] __dump_stack+0x30/0x40 [ 76.719393][ T4753] dump_stack_lvl+0xf4/0x15c [ 76.720090][ T4753] dump_stack+0x1c/0x5c [ 76.720715][ T4753] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.721611][ T4753] dccp_xmit_packet+0x298/0x460 [ 76.722350][ T4753] dccp_write_xmit+0x118/0x1d0 [ 76.723074][ T4753] dccp_sendmsg+0x510/0x850 [ 76.723807][ T4753] inet_sendmsg+0x154/0x27c [ 76.724556][ T4753] __sys_sendto+0x30c/0x420 [ 76.725292][ T4753] __arm64_sys_sendto+0xe4/0x104 [ 76.726134][ T4753] invoke_syscall+0x98/0x28c [ 76.726883][ T4753] el0_svc_common+0x13c/0x258 [ 76.727595][ T4753] do_el0_svc+0x5c/0x140 [ 76.728250][ T4753] el0_svc+0x78/0x1d0 [ 76.728884][ T4753] el0t_64_sync_handler+0xcc/0xe4 [ 76.729705][ T4753] el0t_64_sync+0x1a0/0x1a4 [ 76.730735][ T4753] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.732450][ T4753] CPU: 1 PID: 4753 Comm: syz.0.46 Not tainted syzkaller #0 [ 76.733543][ T4753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.735006][ T4753] Call trace: [ 76.735464][ T4753] dump_backtrace+0x0/0x458 [ 76.736118][ T4753] show_stack+0x2c/0x3c [ 76.736741][ T4753] __dump_stack+0x30/0x40 [ 76.737431][ T4753] dump_stack_lvl+0xf4/0x15c [ 76.738169][ T4753] dump_stack+0x1c/0x5c [ 76.738856][ T4753] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.739727][ T4753] dccp_xmit_packet+0x298/0x460 [ 76.740497][ T4753] dccp_write_xmit+0x118/0x1d0 [ 76.741280][ T4753] dccp_sendmsg+0x510/0x850 [ 76.742059][ T4753] inet_sendmsg+0x154/0x27c [ 76.742811][ T4753] __sys_sendto+0x30c/0x420 [ 76.743555][ T4753] __arm64_sys_sendto+0xe4/0x104 [ 76.744330][ T4753] invoke_syscall+0x98/0x28c [ 76.745064][ T4753] el0_svc_common+0x13c/0x258 [ 76.745816][ T4753] do_el0_svc+0x5c/0x140 [ 76.746577][ T4753] el0_svc+0x78/0x1d0 [ 76.747221][ T4753] el0t_64_sync_handler+0xcc/0xe4 [ 76.748035][ T4753] el0t_64_sync+0x1a0/0x1a4 [ 76.748979][ T4753] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.750592][ T4753] CPU: 1 PID: 4753 Comm: syz.0.46 Not tainted syzkaller #0 [ 76.751615][ T4753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.753051][ T4753] Call trace: [ 76.753529][ T4753] dump_backtrace+0x0/0x458 [ 76.754209][ T4753] show_stack+0x2c/0x3c [ 76.754859][ T4753] __dump_stack+0x30/0x40 [ 76.755541][ T4753] dump_stack_lvl+0xf4/0x15c [ 76.756164][ T4753] dump_stack+0x1c/0x5c [ 76.756867][ T4753] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.757771][ T4753] dccp_xmit_packet+0x298/0x460 [ 76.758513][ T4753] dccp_write_xmit+0x118/0x1d0 [ 76.759238][ T4753] dccp_sendmsg+0x510/0x850 [ 76.759952][ T4753] inet_sendmsg+0x154/0x27c [ 76.760627][ T4753] __sys_sendto+0x30c/0x420 [ 76.761322][ T4753] __arm64_sys_sendto+0xe4/0x104 [ 76.762168][ T4753] invoke_syscall+0x98/0x28c [ 76.762922][ T4753] el0_svc_common+0x13c/0x258 [ 76.763668][ T4753] do_el0_svc+0x5c/0x140 [ 76.764365][ T4753] el0_svc+0x78/0x1d0 [ 76.764986][ T4753] el0t_64_sync_handler+0xcc/0xe4 [ 76.765828][ T4753] el0t_64_sync+0x1a0/0x1a4 [ 76.766670][ T4753] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.768482][ T4753] CPU: 1 PID: 4753 Comm: syz.0.46 Not tainted syzkaller #0 [ 76.769570][ T4753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.771046][ T4753] Call trace: [ 76.771573][ T4753] dump_backtrace+0x0/0x458 [ 76.772304][ T4753] show_stack+0x2c/0x3c [ 76.772926][ T4753] __dump_stack+0x30/0x40 [ 76.773595][ T4753] dump_stack_lvl+0xf4/0x15c [ 76.774291][ T4753] dump_stack+0x1c/0x5c [ 76.774929][ T4753] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.775813][ T4753] dccp_xmit_packet+0x298/0x460 [ 76.776575][ T4753] dccp_write_xmit+0x118/0x1d0 [ 76.777263][ T4753] dccp_sendmsg+0x510/0x850 [ 76.778077][ T4753] inet_sendmsg+0x154/0x27c [ 76.778875][ T4753] __sys_sendto+0x30c/0x420 [ 76.779640][ T4753] __arm64_sys_sendto+0xe4/0x104 [ 76.780443][ T4753] invoke_syscall+0x98/0x28c [ 76.781265][ T4753] el0_svc_common+0x13c/0x258 [ 76.782154][ T4753] do_el0_svc+0x5c/0x140 [ 76.782912][ T4753] el0_svc+0x78/0x1d0 [ 76.783566][ T4753] el0t_64_sync_handler+0xcc/0xe4 [ 76.784363][ T4753] el0t_64_sync+0x1a0/0x1a4 [ 76.785240][ T4753] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.786804][ T4753] CPU: 1 PID: 4753 Comm: syz.0.46 Not tainted syzkaller #0 [ 76.787856][ T4753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.789458][ T4753] Call trace: [ 76.790033][ T4753] dump_backtrace+0x0/0x458 [ 76.790773][ T4753] show_stack+0x2c/0x3c [ 76.791445][ T4753] __dump_stack+0x30/0x40 [ 76.792171][ T4753] dump_stack_lvl+0xf4/0x15c [ 76.792922][ T4753] dump_stack+0x1c/0x5c [ 76.793614][ T4753] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.794472][ T4753] dccp_xmit_packet+0x298/0x460 [ 76.795221][ T4753] dccp_write_xmit+0x118/0x1d0 [ 76.795975][ T4753] dccp_sendmsg+0x510/0x850 [ 76.796730][ T4753] inet_sendmsg+0x154/0x27c [ 76.797478][ T4753] __sys_sendto+0x30c/0x420 [ 76.798210][ T4753] __arm64_sys_sendto+0xe4/0x104 [ 76.799043][ T4753] invoke_syscall+0x98/0x28c [ 76.799857][ T4753] el0_svc_common+0x13c/0x258 [ 76.800614][ T4753] do_el0_svc+0x5c/0x140 [ 76.801306][ T4753] el0_svc+0x78/0x1d0 [ 76.801931][ T4753] el0t_64_sync_handler+0xcc/0xe4 [ 76.802743][ T4753] el0t_64_sync+0x1a0/0x1a4 [ 76.803608][ T4753] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.805333][ T4753] CPU: 1 PID: 4753 Comm: syz.0.46 Not tainted syzkaller #0 [ 76.806362][ T4753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.807867][ T4753] Call trace: [ 76.808393][ T4753] dump_backtrace+0x0/0x458 [ 76.809115][ T4753] show_stack+0x2c/0x3c [ 76.809764][ T4753] __dump_stack+0x30/0x40 [ 76.810434][ T4753] dump_stack_lvl+0xf4/0x15c [ 76.811179][ T4753] dump_stack+0x1c/0x5c [ 76.811851][ T4753] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.812727][ T4753] dccp_xmit_packet+0x298/0x460 [ 76.813611][ T4753] dccp_write_xmit+0x118/0x1d0 [ 76.814396][ T4753] dccp_sendmsg+0x510/0x850 [ 76.815116][ T4753] inet_sendmsg+0x154/0x27c [ 76.815887][ T4753] __sys_sendto+0x30c/0x420 [ 76.816605][ T4753] __arm64_sys_sendto+0xe4/0x104 [ 76.817442][ T4753] invoke_syscall+0x98/0x28c [ 76.818239][ T4753] el0_svc_common+0x13c/0x258 [ 76.818990][ T4753] do_el0_svc+0x5c/0x140 [ 76.819687][ T4753] el0_svc+0x78/0x1d0 [ 76.820336][ T4753] el0t_64_sync_handler+0xcc/0xe4 [ 76.821192][ T4753] el0t_64_sync+0x1a0/0x1a4 [ 76.838845][ T4755] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.840572][ T4755] CPU: 1 PID: 4755 Comm: syz.0.47 Not tainted syzkaller #0 [ 76.841614][ T4755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.843059][ T4755] Call trace: [ 76.843614][ T4755] dump_backtrace+0x0/0x458 [ 76.844285][ T4755] show_stack+0x2c/0x3c [ 76.844911][ T4755] __dump_stack+0x30/0x40 [ 76.845562][ T4755] dump_stack_lvl+0xf4/0x15c [ 76.846227][ T4755] dump_stack+0x1c/0x5c [ 76.846855][ T4755] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.847661][ T4755] dccp_xmit_packet+0x298/0x460 [ 76.848473][ T4755] dccp_write_xmit+0x118/0x1d0 [ 76.849220][ T4755] dccp_sendmsg+0x510/0x850 [ 76.849935][ T4755] inet_sendmsg+0x154/0x27c [ 76.850634][ T4755] __sys_sendto+0x30c/0x420 [ 76.851285][ T4755] __arm64_sys_sendto+0xe4/0x104 [ 76.852236][ T4755] invoke_syscall+0x98/0x28c [ 76.852980][ T4755] el0_svc_common+0x13c/0x258 [ 76.853749][ T4755] do_el0_svc+0x5c/0x140 [ 76.854441][ T4755] el0_svc+0x78/0x1d0 [ 76.855120][ T4755] el0t_64_sync_handler+0xcc/0xe4 [ 76.855962][ T4755] el0t_64_sync+0x1a0/0x1a4 [ 76.856892][ T4755] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.859146][ T4755] CPU: 1 PID: 4755 Comm: syz.0.47 Not tainted syzkaller #0 [ 76.860179][ T4755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.861575][ T4755] Call trace: [ 76.862044][ T4755] dump_backtrace+0x0/0x458 [ 76.862756][ T4755] show_stack+0x2c/0x3c [ 76.863372][ T4755] __dump_stack+0x30/0x40 [ 76.864031][ T4755] dump_stack_lvl+0xf4/0x15c [ 76.864707][ T4755] dump_stack+0x1c/0x5c [ 76.865299][ T4755] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.866066][ T4755] dccp_xmit_packet+0x298/0x460 [ 76.866784][ T4755] dccp_write_xmit+0x118/0x1d0 [ 76.867527][ T4755] dccp_sendmsg+0x510/0x850 [ 76.868209][ T4755] inet_sendmsg+0x154/0x27c [ 76.868950][ T4755] __sys_sendto+0x30c/0x420 [ 76.869702][ T4755] __arm64_sys_sendto+0xe4/0x104 [ 76.870463][ T4755] invoke_syscall+0x98/0x28c [ 76.871179][ T4755] el0_svc_common+0x13c/0x258 [ 76.871921][ T4755] do_el0_svc+0x5c/0x140 [ 76.872582][ T4755] el0_svc+0x78/0x1d0 [ 76.873211][ T4755] el0t_64_sync_handler+0xcc/0xe4 [ 76.874004][ T4755] el0t_64_sync+0x1a0/0x1a4 [ 76.874805][ T4755] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.876455][ T4755] CPU: 1 PID: 4755 Comm: syz.0.47 Not tainted syzkaller #0 [ 76.877564][ T4755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.879154][ T4755] Call trace: [ 76.879680][ T4755] dump_backtrace+0x0/0x458 [ 76.880428][ T4755] show_stack+0x2c/0x3c [ 76.881063][ T4755] __dump_stack+0x30/0x40 [ 76.881711][ T4755] dump_stack_lvl+0xf4/0x15c [ 76.882421][ T4755] dump_stack+0x1c/0x5c [ 76.883084][ T4755] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.883945][ T4755] dccp_xmit_packet+0x298/0x460 [ 76.884726][ T4755] dccp_write_xmit+0x118/0x1d0 [ 76.885480][ T4755] dccp_sendmsg+0x510/0x850 [ 76.886208][ T4755] inet_sendmsg+0x154/0x27c [ 76.886915][ T4755] __sys_sendto+0x30c/0x420 [ 76.887600][ T4755] __arm64_sys_sendto+0xe4/0x104 [ 76.888339][ T4755] invoke_syscall+0x98/0x28c [ 76.889041][ T4755] el0_svc_common+0x13c/0x258 [ 76.889825][ T4755] do_el0_svc+0x5c/0x140 [ 76.890477][ T4755] el0_svc+0x78/0x1d0 [ 76.891085][ T4755] el0t_64_sync_handler+0xcc/0xe4 [ 76.891856][ T4755] el0t_64_sync+0x1a0/0x1a4 [ 76.892845][ T4755] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.894598][ T4755] CPU: 1 PID: 4755 Comm: syz.0.47 Not tainted syzkaller #0 [ 76.895610][ T4755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.897159][ T4755] Call trace: [ 76.897639][ T4755] dump_backtrace+0x0/0x458 [ 76.898296][ T4755] show_stack+0x2c/0x3c [ 76.898974][ T4755] __dump_stack+0x30/0x40 [ 76.899651][ T4755] dump_stack_lvl+0xf4/0x15c [ 76.900410][ T4755] dump_stack+0x1c/0x5c [ 76.901048][ T4755] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.901848][ T4755] dccp_xmit_packet+0x298/0x460 [ 76.902641][ T4755] dccp_write_xmit+0x118/0x1d0 [ 76.903369][ T4755] dccp_sendmsg+0x510/0x850 [ 76.904038][ T4755] inet_sendmsg+0x154/0x27c [ 76.904744][ T4755] __sys_sendto+0x30c/0x420 [ 76.905439][ T4755] __arm64_sys_sendto+0xe4/0x104 [ 76.906158][ T4755] invoke_syscall+0x98/0x28c [ 76.906806][ T4755] el0_svc_common+0x13c/0x258 [ 76.907557][ T4755] do_el0_svc+0x5c/0x140 [ 76.908318][ T4755] el0_svc+0x78/0x1d0 [ 76.908926][ T4755] el0t_64_sync_handler+0xcc/0xe4 [ 76.909685][ T4755] el0t_64_sync+0x1a0/0x1a4 [ 76.911246][ T4755] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.912765][ T4755] CPU: 1 PID: 4755 Comm: syz.0.47 Not tainted syzkaller #0 [ 76.913825][ T4755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.915287][ T4755] Call trace: [ 76.915777][ T4755] dump_backtrace+0x0/0x458 [ 76.916403][ T4755] show_stack+0x2c/0x3c [ 76.917076][ T4755] __dump_stack+0x30/0x40 [ 76.917750][ T4755] dump_stack_lvl+0xf4/0x15c [ 76.918514][ T4755] dump_stack+0x1c/0x5c [ 76.919153][ T4755] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.920029][ T4755] dccp_xmit_packet+0x298/0x460 [ 76.920749][ T4755] dccp_write_xmit+0x118/0x1d0 [ 76.921482][ T4755] dccp_sendmsg+0x510/0x850 [ 76.922160][ T4755] inet_sendmsg+0x154/0x27c [ 76.922888][ T4755] __sys_sendto+0x30c/0x420 [ 76.923663][ T4755] __arm64_sys_sendto+0xe4/0x104 [ 76.924449][ T4755] invoke_syscall+0x98/0x28c [ 76.925161][ T4755] el0_svc_common+0x13c/0x258 [ 76.925905][ T4755] do_el0_svc+0x5c/0x140 [ 76.926600][ T4755] el0_svc+0x78/0x1d0 [ 76.927209][ T4755] el0t_64_sync_handler+0xcc/0xe4 [ 76.928096][ T4755] el0t_64_sync+0x1a0/0x1a4 [ 76.929195][ T4755] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.930905][ T4755] CPU: 1 PID: 4755 Comm: syz.0.47 Not tainted syzkaller #0 [ 76.932012][ T4755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.933642][ T4755] Call trace: [ 76.934172][ T4755] dump_backtrace+0x0/0x458 [ 76.934842][ T4755] show_stack+0x2c/0x3c [ 76.935490][ T4755] __dump_stack+0x30/0x40 [ 76.936171][ T4755] dump_stack_lvl+0xf4/0x15c [ 76.936826][ T4755] dump_stack+0x1c/0x5c [ 76.937520][ T4755] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.938384][ T4755] dccp_xmit_packet+0x298/0x460 [ 76.939145][ T4755] dccp_write_xmit+0x118/0x1d0 [ 76.939914][ T4755] dccp_sendmsg+0x510/0x850 [ 76.940624][ T4755] inet_sendmsg+0x154/0x27c [ 76.941480][ T4755] __sys_sendto+0x30c/0x420 [ 76.942289][ T4755] __arm64_sys_sendto+0xe4/0x104 [ 76.943167][ T4755] invoke_syscall+0x98/0x28c [ 76.943902][ T4755] el0_svc_common+0x13c/0x258 [ 76.944643][ T4755] do_el0_svc+0x5c/0x140 [ 76.945278][ T4755] el0_svc+0x78/0x1d0 [ 76.945920][ T4755] el0t_64_sync_handler+0xcc/0xe4 [ 76.946808][ T4755] el0t_64_sync+0x1a0/0x1a4 [ 76.947631][ T4755] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.949427][ T4755] CPU: 1 PID: 4755 Comm: syz.0.47 Not tainted syzkaller #0 [ 76.950412][ T4755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.951924][ T4755] Call trace: [ 76.952438][ T4755] dump_backtrace+0x0/0x458 [ 76.953117][ T4755] show_stack+0x2c/0x3c [ 76.953761][ T4755] __dump_stack+0x30/0x40 [ 76.954520][ T4755] dump_stack_lvl+0xf4/0x15c [ 76.955211][ T4755] dump_stack+0x1c/0x5c [ 76.955791][ T4755] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.956647][ T4755] dccp_xmit_packet+0x298/0x460 [ 76.957392][ T4755] dccp_write_xmit+0x118/0x1d0 [ 76.958098][ T4755] dccp_sendmsg+0x510/0x850 [ 76.958758][ T4755] inet_sendmsg+0x154/0x27c [ 76.959484][ T4755] __sys_sendto+0x30c/0x420 [ 76.960167][ T4755] __arm64_sys_sendto+0xe4/0x104 [ 76.961023][ T4755] invoke_syscall+0x98/0x28c [ 76.961741][ T4755] el0_svc_common+0x13c/0x258 [ 76.962552][ T4755] do_el0_svc+0x5c/0x140 [ 76.963178][ T4755] el0_svc+0x78/0x1d0 [ 76.963829][ T4755] el0t_64_sync_handler+0xcc/0xe4 [ 76.964622][ T4755] el0t_64_sync+0x1a0/0x1a4 [ 76.965680][ T4755] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.967262][ T4755] CPU: 1 PID: 4755 Comm: syz.0.47 Not tainted syzkaller #0 [ 76.968381][ T4755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.969901][ T4755] Call trace: [ 76.970360][ T4755] dump_backtrace+0x0/0x458 [ 76.971066][ T4755] show_stack+0x2c/0x3c [ 76.971724][ T4755] __dump_stack+0x30/0x40 [ 76.972350][ T4755] dump_stack_lvl+0xf4/0x15c [ 76.972996][ T4755] dump_stack+0x1c/0x5c [ 76.973708][ T4755] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.974611][ T4755] dccp_xmit_packet+0x298/0x460 [ 76.975444][ T4755] dccp_write_xmit+0x118/0x1d0 [ 76.976200][ T4755] dccp_sendmsg+0x510/0x850 [ 76.976884][ T4755] inet_sendmsg+0x154/0x27c [ 76.977628][ T4755] __sys_sendto+0x30c/0x420 [ 76.978350][ T4755] __arm64_sys_sendto+0xe4/0x104 [ 76.979171][ T4755] invoke_syscall+0x98/0x28c [ 76.979927][ T4755] el0_svc_common+0x13c/0x258 [ 76.980662][ T4755] do_el0_svc+0x5c/0x140 [ 76.981277][ T4755] el0_svc+0x78/0x1d0 [ 76.981887][ T4755] el0t_64_sync_handler+0xcc/0xe4 [ 76.982704][ T4755] el0t_64_sync+0x1a0/0x1a4 [ 76.983612][ T4755] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 76.985363][ T4755] CPU: 1 PID: 4755 Comm: syz.0.47 Not tainted syzkaller #0 [ 76.986453][ T4755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.987885][ T4755] Call trace: [ 76.988344][ T4755] dump_backtrace+0x0/0x458 [ 76.989038][ T4755] show_stack+0x2c/0x3c [ 76.989659][ T4755] __dump_stack+0x30/0x40 [ 76.990342][ T4755] dump_stack_lvl+0xf4/0x15c [ 76.991017][ T4755] dump_stack+0x1c/0x5c [ 76.991659][ T4755] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 76.992493][ T4755] dccp_xmit_packet+0x298/0x460 [ 76.993209][ T4755] dccp_write_xmit+0x118/0x1d0 [ 76.993936][ T4755] dccp_sendmsg+0x510/0x850 [ 76.994677][ T4755] inet_sendmsg+0x154/0x27c [ 76.995331][ T4755] __sys_sendto+0x30c/0x420 [ 76.996011][ T4755] __arm64_sys_sendto+0xe4/0x104 [ 76.996771][ T4755] invoke_syscall+0x98/0x28c [ 76.997455][ T4755] el0_svc_common+0x13c/0x258 [ 76.998195][ T4755] do_el0_svc+0x5c/0x140 [ 76.998894][ T4755] el0_svc+0x78/0x1d0 [ 76.999567][ T4755] el0t_64_sync_handler+0xcc/0xe4 [ 77.000361][ T4755] el0t_64_sync+0x1a0/0x1a4 [ 77.001259][ T4755] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.002943][ T4755] CPU: 1 PID: 4755 Comm: syz.0.47 Not tainted syzkaller #0 [ 77.004016][ T4755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.005546][ T4755] Call trace: [ 77.006024][ T4755] dump_backtrace+0x0/0x458 [ 77.006727][ T4755] show_stack+0x2c/0x3c [ 77.007321][ T4755] __dump_stack+0x30/0x40 [ 77.007984][ T4755] dump_stack_lvl+0xf4/0x15c [ 77.008717][ T4755] dump_stack+0x1c/0x5c [ 77.009397][ T4755] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.010275][ T4755] dccp_xmit_packet+0x298/0x460 [ 77.011057][ T4755] dccp_write_xmit+0x118/0x1d0 [ 77.011757][ T4755] dccp_sendmsg+0x510/0x850 [ 77.012443][ T4755] inet_sendmsg+0x154/0x27c [ 77.013205][ T4755] __sys_sendto+0x30c/0x420 [ 77.013930][ T4755] __arm64_sys_sendto+0xe4/0x104 [ 77.014690][ T4755] invoke_syscall+0x98/0x28c [ 77.015406][ T4755] el0_svc_common+0x13c/0x258 [ 77.016149][ T4755] do_el0_svc+0x5c/0x140 [ 77.016814][ T4755] el0_svc+0x78/0x1d0 [ 77.017460][ T4755] el0t_64_sync_handler+0xcc/0xe4 [ 77.018212][ T4755] el0t_64_sync+0x1a0/0x1a4 [ 77.019100][ T4755] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.020932][ T4755] CPU: 1 PID: 4755 Comm: syz.0.47 Not tainted syzkaller #0 [ 77.022007][ T4755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.023444][ T4755] Call trace: [ 77.023902][ T4755] dump_backtrace+0x0/0x458 [ 77.024600][ T4755] show_stack+0x2c/0x3c [ 77.025261][ T4755] __dump_stack+0x30/0x40 [ 77.025979][ T4755] dump_stack_lvl+0xf4/0x15c [ 77.026666][ T4755] dump_stack+0x1c/0x5c [ 77.027335][ T4755] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.028177][ T4755] dccp_xmit_packet+0x298/0x460 [ 77.028951][ T4755] dccp_write_xmit+0x118/0x1d0 [ 77.029707][ T4755] dccp_sendmsg+0x510/0x850 [ 77.030453][ T4755] inet_sendmsg+0x154/0x27c [ 77.031107][ T4755] __sys_sendto+0x30c/0x420 [ 77.031831][ T4755] __arm64_sys_sendto+0xe4/0x104 [ 77.032620][ T4755] invoke_syscall+0x98/0x28c [ 77.033318][ T4755] el0_svc_common+0x13c/0x258 [ 77.034116][ T4755] do_el0_svc+0x5c/0x140 [ 77.034835][ T4755] el0_svc+0x78/0x1d0 [ 77.035495][ T4755] el0t_64_sync_handler+0xcc/0xe4 [ 77.036269][ T4755] el0t_64_sync+0x1a0/0x1a4 [ 77.037157][ T4755] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.038907][ T4755] CPU: 1 PID: 4755 Comm: syz.0.47 Not tainted syzkaller #0 [ 77.040014][ T4755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.041525][ T4755] Call trace: [ 77.041991][ T4755] dump_backtrace+0x0/0x458 [ 77.042644][ T4755] show_stack+0x2c/0x3c [ 77.043236][ T4755] __dump_stack+0x30/0x40 [ 77.043920][ T4755] dump_stack_lvl+0xf4/0x15c [ 77.044643][ T4755] dump_stack+0x1c/0x5c [ 77.045280][ T4755] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.046028][ T4755] dccp_xmit_packet+0x298/0x460 [ 77.046696][ T4755] dccp_write_xmit+0x118/0x1d0 [ 77.047376][ T4755] dccp_sendmsg+0x510/0x850 [ 77.048116][ T4755] inet_sendmsg+0x154/0x27c [ 77.048792][ T4755] __sys_sendto+0x30c/0x420 [ 77.049513][ T4755] __arm64_sys_sendto+0xe4/0x104 [ 77.050319][ T4755] invoke_syscall+0x98/0x28c [ 77.051029][ T4755] el0_svc_common+0x13c/0x258 [ 77.051812][ T4755] do_el0_svc+0x5c/0x140 [ 77.052444][ T4755] el0_svc+0x78/0x1d0 [ 77.053101][ T4755] el0t_64_sync_handler+0xcc/0xe4 [ 77.053884][ T4755] el0t_64_sync+0x1a0/0x1a4 [ 77.054914][ T4755] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.056604][ T4755] CPU: 1 PID: 4755 Comm: syz.0.47 Not tainted syzkaller #0 [ 77.057716][ T4755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.059275][ T4755] Call trace: [ 77.059788][ T4755] dump_backtrace+0x0/0x458 [ 77.060570][ T4755] show_stack+0x2c/0x3c [ 77.061209][ T4755] __dump_stack+0x30/0x40 [ 77.061895][ T4755] dump_stack_lvl+0xf4/0x15c [ 77.062626][ T4755] dump_stack+0x1c/0x5c [ 77.063304][ T4755] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.064160][ T4755] dccp_xmit_packet+0x298/0x460 [ 77.064998][ T4755] dccp_write_xmit+0x118/0x1d0 [ 77.065691][ T4755] dccp_sendmsg+0x510/0x850 [ 77.066490][ T4755] inet_sendmsg+0x154/0x27c [ 77.067214][ T4755] __sys_sendto+0x30c/0x420 [ 77.067933][ T4755] __arm64_sys_sendto+0xe4/0x104 [ 77.068709][ T4755] invoke_syscall+0x98/0x28c [ 77.069382][ T4755] el0_svc_common+0x13c/0x258 [ 77.070136][ T4755] do_el0_svc+0x5c/0x140 [ 77.070901][ T4755] el0_svc+0x78/0x1d0 [ 77.071552][ T4755] el0t_64_sync_handler+0xcc/0xe4 [ 77.072394][ T4755] el0t_64_sync+0x1a0/0x1a4 [ 77.073323][ T4755] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.074927][ T4755] CPU: 1 PID: 4755 Comm: syz.0.47 Not tainted syzkaller #0 [ 77.075988][ T4755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.077444][ T4755] Call trace: [ 77.077969][ T4755] dump_backtrace+0x0/0x458 [ 77.078637][ T4755] show_stack+0x2c/0x3c [ 77.079265][ T4755] __dump_stack+0x30/0x40 [ 77.079911][ T4755] dump_stack_lvl+0xf4/0x15c [ 77.080582][ T4755] dump_stack+0x1c/0x5c [ 77.081202][ T4755] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.082059][ T4755] dccp_xmit_packet+0x298/0x460 [ 77.082780][ T4755] dccp_write_xmit+0x118/0x1d0 [ 77.083558][ T4755] dccp_sendmsg+0x510/0x850 [ 77.084278][ T4755] inet_sendmsg+0x154/0x27c [ 77.085011][ T4755] __sys_sendto+0x30c/0x420 [ 77.085706][ T4755] __arm64_sys_sendto+0xe4/0x104 [ 77.086454][ T4755] invoke_syscall+0x98/0x28c [ 77.087134][ T4755] el0_svc_common+0x13c/0x258 [ 77.087806][ T4755] do_el0_svc+0x5c/0x140 [ 77.088452][ T4755] el0_svc+0x78/0x1d0 [ 77.089062][ T4755] el0t_64_sync_handler+0xcc/0xe4 [ 77.089823][ T4755] el0t_64_sync+0x1a0/0x1a4 [ 77.106719][ T4757] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.108560][ T4757] CPU: 1 PID: 4757 Comm: syz.0.48 Not tainted syzkaller #0 [ 77.109679][ T4757] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.111149][ T4757] Call trace: [ 77.111644][ T4757] dump_backtrace+0x0/0x458 [ 77.112331][ T4757] show_stack+0x2c/0x3c [ 77.112931][ T4757] __dump_stack+0x30/0x40 [ 77.113523][ T4757] dump_stack_lvl+0xf4/0x15c [ 77.114238][ T4757] dump_stack+0x1c/0x5c [ 77.114863][ T4757] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.115696][ T4757] dccp_xmit_packet+0x298/0x460 [ 77.116342][ T4757] dccp_write_xmit+0x118/0x1d0 [ 77.117153][ T4757] dccp_sendmsg+0x510/0x850 [ 77.117817][ T4757] inet_sendmsg+0x154/0x27c [ 77.118512][ T4757] __sys_sendto+0x30c/0x420 [ 77.119257][ T4757] __arm64_sys_sendto+0xe4/0x104 [ 77.120091][ T4757] invoke_syscall+0x98/0x28c [ 77.120845][ T4757] el0_svc_common+0x13c/0x258 [ 77.121585][ T4757] do_el0_svc+0x5c/0x140 [ 77.122278][ T4757] el0_svc+0x78/0x1d0 [ 77.122980][ T4757] el0t_64_sync_handler+0xcc/0xe4 [ 77.123772][ T4757] el0t_64_sync+0x1a0/0x1a4 [ 77.125111][ T4757] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.127008][ T4757] CPU: 1 PID: 4757 Comm: syz.0.48 Not tainted syzkaller #0 [ 77.128070][ T4757] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.129702][ T4757] Call trace: [ 77.130255][ T4757] dump_backtrace+0x0/0x458 [ 77.130987][ T4757] show_stack+0x2c/0x3c [ 77.131683][ T4757] __dump_stack+0x30/0x40 [ 77.132351][ T4757] dump_stack_lvl+0xf4/0x15c [ 77.133106][ T4757] dump_stack+0x1c/0x5c [ 77.133810][ T4757] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.134762][ T4757] dccp_xmit_packet+0x298/0x460 [ 77.135675][ T4757] dccp_write_xmit+0x118/0x1d0 [ 77.136451][ T4757] dccp_sendmsg+0x510/0x850 [ 77.137199][ T4757] inet_sendmsg+0x154/0x27c [ 77.137940][ T4757] __sys_sendto+0x30c/0x420 [ 77.138632][ T4757] __arm64_sys_sendto+0xe4/0x104 [ 77.139368][ T4757] invoke_syscall+0x98/0x28c [ 77.140122][ T4757] el0_svc_common+0x13c/0x258 [ 77.140808][ T4757] do_el0_svc+0x5c/0x140 [ 77.141509][ T4757] el0_svc+0x78/0x1d0 [ 77.142168][ T4757] el0t_64_sync_handler+0xcc/0xe4 [ 77.142941][ T4757] el0t_64_sync+0x1a0/0x1a4 [ 77.143937][ T4757] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.145765][ T4757] CPU: 1 PID: 4757 Comm: syz.0.48 Not tainted syzkaller #0 [ 77.146841][ T4757] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.148377][ T4757] Call trace: [ 77.148897][ T4757] dump_backtrace+0x0/0x458 [ 77.149638][ T4757] show_stack+0x2c/0x3c [ 77.150256][ T4757] __dump_stack+0x30/0x40 [ 77.150922][ T4757] dump_stack_lvl+0xf4/0x15c [ 77.151605][ T4757] dump_stack+0x1c/0x5c [ 77.152234][ T4757] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.153056][ T4757] dccp_xmit_packet+0x298/0x460 [ 77.153786][ T4757] dccp_write_xmit+0x118/0x1d0 [ 77.154496][ T4757] dccp_sendmsg+0x510/0x850 [ 77.155156][ T4757] inet_sendmsg+0x154/0x27c [ 77.155847][ T4757] __sys_sendto+0x30c/0x420 [ 77.156501][ T4757] __arm64_sys_sendto+0xe4/0x104 [ 77.157224][ T4757] invoke_syscall+0x98/0x28c [ 77.157895][ T4757] el0_svc_common+0x13c/0x258 [ 77.158668][ T4757] do_el0_svc+0x5c/0x140 [ 77.159333][ T4757] el0_svc+0x78/0x1d0 [ 77.159933][ T4757] el0t_64_sync_handler+0xcc/0xe4 [ 77.160681][ T4757] el0t_64_sync+0x1a0/0x1a4 [ 77.161713][ T4757] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.163725][ T4757] CPU: 1 PID: 4757 Comm: syz.0.48 Not tainted syzkaller #0 [ 77.164865][ T4757] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.166539][ T4757] Call trace: [ 77.167038][ T4757] dump_backtrace+0x0/0x458 [ 77.167727][ T4757] show_stack+0x2c/0x3c [ 77.168367][ T4757] __dump_stack+0x30/0x40 [ 77.169035][ T4757] dump_stack_lvl+0xf4/0x15c [ 77.169761][ T4757] dump_stack+0x1c/0x5c [ 77.170459][ T4757] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.171285][ T4757] dccp_xmit_packet+0x298/0x460 [ 77.172018][ T4757] dccp_write_xmit+0x118/0x1d0 [ 77.172771][ T4757] dccp_sendmsg+0x510/0x850 [ 77.173462][ T4757] inet_sendmsg+0x154/0x27c [ 77.174139][ T4757] __sys_sendto+0x30c/0x420 [ 77.174818][ T4757] __arm64_sys_sendto+0xe4/0x104 [ 77.175569][ T4757] invoke_syscall+0x98/0x28c [ 77.176267][ T4757] el0_svc_common+0x13c/0x258 [ 77.176972][ T4757] do_el0_svc+0x5c/0x140 [ 77.177593][ T4757] el0_svc+0x78/0x1d0 [ 77.178172][ T4757] el0t_64_sync_handler+0xcc/0xe4 [ 77.178909][ T4757] el0t_64_sync+0x1a0/0x1a4 [ 77.179793][ T4757] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.181407][ T4757] CPU: 1 PID: 4757 Comm: syz.0.48 Not tainted syzkaller #0 [ 77.182495][ T4757] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.184000][ T4757] Call trace: [ 77.184466][ T4757] dump_backtrace+0x0/0x458 [ 77.185113][ T4757] show_stack+0x2c/0x3c [ 77.185729][ T4757] __dump_stack+0x30/0x40 [ 77.186342][ T4757] dump_stack_lvl+0xf4/0x15c [ 77.186990][ T4757] dump_stack+0x1c/0x5c [ 77.187580][ T4757] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.188373][ T4757] dccp_xmit_packet+0x298/0x460 [ 77.189150][ T4757] dccp_write_xmit+0x118/0x1d0 [ 77.189844][ T4757] dccp_sendmsg+0x510/0x850 [ 77.190504][ T4757] inet_sendmsg+0x154/0x27c [ 77.191175][ T4757] __sys_sendto+0x30c/0x420 [ 77.191839][ T4757] __arm64_sys_sendto+0xe4/0x104 [ 77.192632][ T4757] invoke_syscall+0x98/0x28c [ 77.193308][ T4757] el0_svc_common+0x13c/0x258 [ 77.194152][ T4757] do_el0_svc+0x5c/0x140 [ 77.194774][ T4757] el0_svc+0x78/0x1d0 [ 77.195377][ T4757] el0t_64_sync_handler+0xcc/0xe4 [ 77.196108][ T4757] el0t_64_sync+0x1a0/0x1a4 [ 77.196985][ T4757] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.198644][ T4757] CPU: 1 PID: 4757 Comm: syz.0.48 Not tainted syzkaller #0 [ 77.199634][ T4757] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.201178][ T4757] Call trace: [ 77.201617][ T4757] dump_backtrace+0x0/0x458 [ 77.202201][ T4757] show_stack+0x2c/0x3c [ 77.202771][ T4757] __dump_stack+0x30/0x40 [ 77.203392][ T4757] dump_stack_lvl+0xf4/0x15c [ 77.204029][ T4757] dump_stack+0x1c/0x5c [ 77.204596][ T4757] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.205309][ T4757] dccp_xmit_packet+0x298/0x460 [ 77.205945][ T4757] dccp_write_xmit+0x118/0x1d0 [ 77.206593][ T4757] dccp_sendmsg+0x510/0x850 [ 77.207256][ T4757] inet_sendmsg+0x154/0x27c [ 77.207903][ T4757] __sys_sendto+0x30c/0x420 [ 77.208564][ T4757] __arm64_sys_sendto+0xe4/0x104 [ 77.209262][ T4757] invoke_syscall+0x98/0x28c [ 77.209920][ T4757] el0_svc_common+0x13c/0x258 [ 77.210587][ T4757] do_el0_svc+0x5c/0x140 [ 77.211233][ T4757] el0_svc+0x78/0x1d0 [ 77.211797][ T4757] el0t_64_sync_handler+0xcc/0xe4 [ 77.212519][ T4757] el0t_64_sync+0x1a0/0x1a4 [ 77.213600][ T4757] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.215054][ T4757] CPU: 1 PID: 4757 Comm: syz.0.48 Not tainted syzkaller #0 [ 77.216035][ T4757] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.217396][ T4757] Call trace: [ 77.217819][ T4757] dump_backtrace+0x0/0x458 [ 77.218455][ T4757] show_stack+0x2c/0x3c [ 77.219170][ T4757] __dump_stack+0x30/0x40 [ 77.219833][ T4757] dump_stack_lvl+0xf4/0x15c [ 77.220513][ T4757] dump_stack+0x1c/0x5c [ 77.221140][ T4757] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.221964][ T4757] dccp_xmit_packet+0x298/0x460 [ 77.222702][ T4757] dccp_write_xmit+0x118/0x1d0 [ 77.223530][ T4757] dccp_sendmsg+0x510/0x850 [ 77.224279][ T4757] inet_sendmsg+0x154/0x27c [ 77.225056][ T4757] __sys_sendto+0x30c/0x420 [ 77.225780][ T4757] __arm64_sys_sendto+0xe4/0x104 [ 77.226569][ T4757] invoke_syscall+0x98/0x28c [ 77.227363][ T4757] el0_svc_common+0x13c/0x258 [ 77.228082][ T4757] do_el0_svc+0x5c/0x140 [ 77.228742][ T4757] el0_svc+0x78/0x1d0 [ 77.229371][ T4757] el0t_64_sync_handler+0xcc/0xe4 [ 77.230196][ T4757] el0t_64_sync+0x1a0/0x1a4 [ 77.231112][ T4757] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.232823][ T4757] CPU: 1 PID: 4757 Comm: syz.0.48 Not tainted syzkaller #0 [ 77.233826][ T4757] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.235231][ T4757] Call trace: [ 77.235740][ T4757] dump_backtrace+0x0/0x458 [ 77.236398][ T4757] show_stack+0x2c/0x3c [ 77.236983][ T4757] __dump_stack+0x30/0x40 [ 77.237618][ T4757] dump_stack_lvl+0xf4/0x15c [ 77.238492][ T4757] dump_stack+0x1c/0x5c [ 77.239120][ T4757] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.239968][ T4757] dccp_xmit_packet+0x298/0x460 [ 77.240720][ T4757] dccp_write_xmit+0x118/0x1d0 [ 77.241491][ T4757] dccp_sendmsg+0x510/0x850 [ 77.242204][ T4757] inet_sendmsg+0x154/0x27c [ 77.242949][ T4757] __sys_sendto+0x30c/0x420 [ 77.243825][ T4757] __arm64_sys_sendto+0xe4/0x104 [ 77.244589][ T4757] invoke_syscall+0x98/0x28c [ 77.245344][ T4757] el0_svc_common+0x13c/0x258 [ 77.246120][ T4757] do_el0_svc+0x5c/0x140 [ 77.246903][ T4757] el0_svc+0x78/0x1d0 [ 77.247525][ T4757] el0t_64_sync_handler+0xcc/0xe4 [ 77.248359][ T4757] el0t_64_sync+0x1a0/0x1a4 [ 77.249225][ T4757] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.250925][ T4757] CPU: 1 PID: 4757 Comm: syz.0.48 Not tainted syzkaller #0 [ 77.252056][ T4757] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.253570][ T4757] Call trace: [ 77.254084][ T4757] dump_backtrace+0x0/0x458 [ 77.254714][ T4757] show_stack+0x2c/0x3c [ 77.255360][ T4757] __dump_stack+0x30/0x40 [ 77.255998][ T4757] dump_stack_lvl+0xf4/0x15c [ 77.256712][ T4757] dump_stack+0x1c/0x5c [ 77.257345][ T4757] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.258091][ T4757] dccp_xmit_packet+0x298/0x460 [ 77.258906][ T4757] dccp_write_xmit+0x118/0x1d0 [ 77.259664][ T4757] dccp_sendmsg+0x510/0x850 [ 77.260378][ T4757] inet_sendmsg+0x154/0x27c [ 77.261117][ T4757] __sys_sendto+0x30c/0x420 [ 77.261892][ T4757] __arm64_sys_sendto+0xe4/0x104 [ 77.262781][ T4757] invoke_syscall+0x98/0x28c [ 77.263507][ T4757] el0_svc_common+0x13c/0x258 [ 77.264230][ T4757] do_el0_svc+0x5c/0x140 [ 77.264923][ T4757] el0_svc+0x78/0x1d0 [ 77.265618][ T4757] el0t_64_sync_handler+0xcc/0xe4 [ 77.266480][ T4757] el0t_64_sync+0x1a0/0x1a4 [ 77.267361][ T4757] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.269156][ T4757] CPU: 1 PID: 4757 Comm: syz.0.48 Not tainted syzkaller #0 [ 77.270421][ T4757] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.272011][ T4757] Call trace: [ 77.272544][ T4757] dump_backtrace+0x0/0x458 [ 77.273222][ T4757] show_stack+0x2c/0x3c [ 77.273876][ T4757] __dump_stack+0x30/0x40 [ 77.274477][ T4757] dump_stack_lvl+0xf4/0x15c [ 77.275154][ T4757] dump_stack+0x1c/0x5c [ 77.275783][ T4757] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.276599][ T4757] dccp_xmit_packet+0x298/0x460 [ 77.277289][ T4757] dccp_write_xmit+0x118/0x1d0 [ 77.277933][ T4757] dccp_sendmsg+0x510/0x850 [ 77.278660][ T4757] inet_sendmsg+0x154/0x27c [ 77.279434][ T4757] __sys_sendto+0x30c/0x420 [ 77.280182][ T4757] __arm64_sys_sendto+0xe4/0x104 [ 77.280968][ T4757] invoke_syscall+0x98/0x28c [ 77.281684][ T4757] el0_svc_common+0x13c/0x258 [ 77.282438][ T4757] do_el0_svc+0x5c/0x140 [ 77.283131][ T4757] el0_svc+0x78/0x1d0 [ 77.283761][ T4757] el0t_64_sync_handler+0xcc/0xe4 [ 77.284578][ T4757] el0t_64_sync+0x1a0/0x1a4 [ 77.285605][ T4757] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.287186][ T4757] CPU: 1 PID: 4757 Comm: syz.0.48 Not tainted syzkaller #0 [ 77.288223][ T4757] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.289753][ T4757] Call trace: [ 77.290243][ T4757] dump_backtrace+0x0/0x458 [ 77.290957][ T4757] show_stack+0x2c/0x3c [ 77.291659][ T4757] __dump_stack+0x30/0x40 [ 77.292387][ T4757] dump_stack_lvl+0xf4/0x15c [ 77.293074][ T4757] dump_stack+0x1c/0x5c [ 77.293714][ T4757] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.294507][ T4757] dccp_xmit_packet+0x298/0x460 [ 77.295236][ T4757] dccp_write_xmit+0x118/0x1d0 [ 77.296020][ T4757] dccp_sendmsg+0x510/0x850 [ 77.296726][ T4757] inet_sendmsg+0x154/0x27c [ 77.297381][ T4757] __sys_sendto+0x30c/0x420 [ 77.298095][ T4757] __arm64_sys_sendto+0xe4/0x104 [ 77.298868][ T4757] invoke_syscall+0x98/0x28c [ 77.299567][ T4757] el0_svc_common+0x13c/0x258 [ 77.300320][ T4757] do_el0_svc+0x5c/0x140 [ 77.300962][ T4757] el0_svc+0x78/0x1d0 [ 77.301571][ T4757] el0t_64_sync_handler+0xcc/0xe4 [ 77.302351][ T4757] el0t_64_sync+0x1a0/0x1a4 [ 77.303189][ T4757] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.304913][ T4757] CPU: 1 PID: 4757 Comm: syz.0.48 Not tainted syzkaller #0 [ 77.305943][ T4757] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.307445][ T4757] Call trace: [ 77.307905][ T4757] dump_backtrace+0x0/0x458 [ 77.308654][ T4757] show_stack+0x2c/0x3c [ 77.309382][ T4757] __dump_stack+0x30/0x40 [ 77.310089][ T4757] dump_stack_lvl+0xf4/0x15c [ 77.310801][ T4757] dump_stack+0x1c/0x5c [ 77.311448][ T4757] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.312283][ T4757] dccp_xmit_packet+0x298/0x460 [ 77.313049][ T4757] dccp_write_xmit+0x118/0x1d0 [ 77.313872][ T4757] dccp_sendmsg+0x510/0x850 [ 77.314607][ T4757] inet_sendmsg+0x154/0x27c [ 77.315376][ T4757] __sys_sendto+0x30c/0x420 [ 77.316107][ T4757] __arm64_sys_sendto+0xe4/0x104 [ 77.316861][ T4757] invoke_syscall+0x98/0x28c [ 77.317563][ T4757] el0_svc_common+0x13c/0x258 [ 77.318255][ T4757] do_el0_svc+0x5c/0x140 [ 77.318948][ T4757] el0_svc+0x78/0x1d0 [ 77.319622][ T4757] el0t_64_sync_handler+0xcc/0xe4 [ 77.320431][ T4757] el0t_64_sync+0x1a0/0x1a4 [ 77.321350][ T4757] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.323177][ T4757] CPU: 1 PID: 4757 Comm: syz.0.48 Not tainted syzkaller #0 [ 77.324237][ T4757] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.325803][ T4757] Call trace: [ 77.326272][ T4757] dump_backtrace+0x0/0x458 [ 77.326991][ T4757] show_stack+0x2c/0x3c [ 77.327664][ T4757] __dump_stack+0x30/0x40 [ 77.328344][ T4757] dump_stack_lvl+0xf4/0x15c [ 77.329060][ T4757] dump_stack+0x1c/0x5c [ 77.329781][ T4757] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.330694][ T4757] dccp_xmit_packet+0x298/0x460 [ 77.331476][ T4757] dccp_write_xmit+0x118/0x1d0 [ 77.332289][ T4757] dccp_sendmsg+0x510/0x850 [ 77.332981][ T4757] inet_sendmsg+0x154/0x27c [ 77.333729][ T4757] __sys_sendto+0x30c/0x420 [ 77.334428][ T4757] __arm64_sys_sendto+0xe4/0x104 [ 77.335232][ T4757] invoke_syscall+0x98/0x28c [ 77.336063][ T4757] el0_svc_common+0x13c/0x258 [ 77.336884][ T4757] do_el0_svc+0x5c/0x140 [ 77.337582][ T4757] el0_svc+0x78/0x1d0 [ 77.338189][ T4757] el0t_64_sync_handler+0xcc/0xe4 [ 77.338928][ T4757] el0t_64_sync+0x1a0/0x1a4 [ 77.339879][ T4757] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.341549][ T4757] CPU: 1 PID: 4757 Comm: syz.0.48 Not tainted syzkaller #0 [ 77.342673][ T4757] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.344145][ T4757] Call trace: [ 77.344629][ T4757] dump_backtrace+0x0/0x458 [ 77.345337][ T4757] show_stack+0x2c/0x3c [ 77.345987][ T4757] __dump_stack+0x30/0x40 [ 77.346667][ T4757] dump_stack_lvl+0xf4/0x15c [ 77.347346][ T4757] dump_stack+0x1c/0x5c [ 77.347944][ T4757] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.348866][ T4757] dccp_xmit_packet+0x298/0x460 [ 77.349628][ T4757] dccp_write_xmit+0x118/0x1d0 [ 77.350393][ T4757] dccp_sendmsg+0x510/0x850 [ 77.351117][ T4757] inet_sendmsg+0x154/0x27c [ 77.351825][ T4757] __sys_sendto+0x30c/0x420 [ 77.352525][ T4757] __arm64_sys_sendto+0xe4/0x104 [ 77.353221][ T4757] invoke_syscall+0x98/0x28c [ 77.353978][ T4757] el0_svc_common+0x13c/0x258 [ 77.354728][ T4757] do_el0_svc+0x5c/0x140 [ 77.355419][ T4757] el0_svc+0x78/0x1d0 [ 77.356067][ T4757] el0t_64_sync_handler+0xcc/0xe4 [ 77.356873][ T4757] el0t_64_sync+0x1a0/0x1a4 [ 77.374456][ T4759] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.376410][ T4759] CPU: 1 PID: 4759 Comm: syz.0.49 Not tainted syzkaller #0 [ 77.377564][ T4759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.379085][ T4759] Call trace: [ 77.379670][ T4759] dump_backtrace+0x0/0x458 [ 77.380439][ T4759] show_stack+0x2c/0x3c [ 77.381098][ T4759] __dump_stack+0x30/0x40 [ 77.381796][ T4759] dump_stack_lvl+0xf4/0x15c [ 77.382578][ T4759] dump_stack+0x1c/0x5c [ 77.383291][ T4759] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.384177][ T4759] dccp_xmit_packet+0x298/0x460 [ 77.384976][ T4759] dccp_write_xmit+0x118/0x1d0 [ 77.385745][ T4759] dccp_sendmsg+0x510/0x850 [ 77.386479][ T4759] inet_sendmsg+0x154/0x27c [ 77.387241][ T4759] __sys_sendto+0x30c/0x420 [ 77.387967][ T4759] __arm64_sys_sendto+0xe4/0x104 [ 77.388734][ T4759] invoke_syscall+0x98/0x28c [ 77.389415][ T4759] el0_svc_common+0x13c/0x258 [ 77.390100][ T4759] do_el0_svc+0x5c/0x140 [ 77.390761][ T4759] el0_svc+0x78/0x1d0 [ 77.391400][ T4759] el0t_64_sync_handler+0xcc/0xe4 [ 77.392180][ T4759] el0t_64_sync+0x1a0/0x1a4 [ 77.393087][ T4759] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.394788][ T4759] CPU: 1 PID: 4759 Comm: syz.0.49 Not tainted syzkaller #0 [ 77.395861][ T4759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.397390][ T4759] Call trace: [ 77.397922][ T4759] dump_backtrace+0x0/0x458 [ 77.398717][ T4759] show_stack+0x2c/0x3c [ 77.399374][ T4759] __dump_stack+0x30/0x40 [ 77.400051][ T4759] dump_stack_lvl+0xf4/0x15c [ 77.400759][ T4759] dump_stack+0x1c/0x5c [ 77.401428][ T4759] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.402258][ T4759] dccp_xmit_packet+0x298/0x460 [ 77.402963][ T4759] dccp_write_xmit+0x118/0x1d0 [ 77.403774][ T4759] dccp_sendmsg+0x510/0x850 [ 77.404601][ T4759] inet_sendmsg+0x154/0x27c [ 77.405312][ T4759] __sys_sendto+0x30c/0x420 [ 77.406019][ T4759] __arm64_sys_sendto+0xe4/0x104 [ 77.406763][ T4759] invoke_syscall+0x98/0x28c [ 77.407532][ T4759] el0_svc_common+0x13c/0x258 [ 77.408248][ T4759] do_el0_svc+0x5c/0x140 [ 77.408937][ T4759] el0_svc+0x78/0x1d0 [ 77.409585][ T4759] el0t_64_sync_handler+0xcc/0xe4 [ 77.410357][ T4759] el0t_64_sync+0x1a0/0x1a4 [ 77.411288][ T4759] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.412841][ T4759] CPU: 1 PID: 4759 Comm: syz.0.49 Not tainted syzkaller #0 [ 77.413887][ T4759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.415388][ T4759] Call trace: [ 77.415853][ T4759] dump_backtrace+0x0/0x458 [ 77.416558][ T4759] show_stack+0x2c/0x3c [ 77.417203][ T4759] __dump_stack+0x30/0x40 [ 77.417907][ T4759] dump_stack_lvl+0xf4/0x15c [ 77.418680][ T4759] dump_stack+0x1c/0x5c [ 77.419370][ T4759] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.420260][ T4759] dccp_xmit_packet+0x298/0x460 [ 77.421074][ T4759] dccp_write_xmit+0x118/0x1d0 [ 77.421928][ T4759] dccp_sendmsg+0x510/0x850 [ 77.422671][ T4759] inet_sendmsg+0x154/0x27c [ 77.423402][ T4759] __sys_sendto+0x30c/0x420 [ 77.424160][ T4759] __arm64_sys_sendto+0xe4/0x104 [ 77.424926][ T4759] invoke_syscall+0x98/0x28c [ 77.425712][ T4759] el0_svc_common+0x13c/0x258 [ 77.426470][ T4759] do_el0_svc+0x5c/0x140 [ 77.427189][ T4759] el0_svc+0x78/0x1d0 [ 77.427770][ T4759] el0t_64_sync_handler+0xcc/0xe4 [ 77.428530][ T4759] el0t_64_sync+0x1a0/0x1a4 [ 77.430086][ T4759] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.431815][ T4759] CPU: 1 PID: 4759 Comm: syz.0.49 Not tainted syzkaller #0 [ 77.432877][ T4759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.434420][ T4759] Call trace: [ 77.434879][ T4759] dump_backtrace+0x0/0x458 [ 77.435594][ T4759] show_stack+0x2c/0x3c [ 77.436272][ T4759] __dump_stack+0x30/0x40 [ 77.436952][ T4759] dump_stack_lvl+0xf4/0x15c [ 77.437689][ T4759] dump_stack+0x1c/0x5c [ 77.438432][ T4759] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.439271][ T4759] dccp_xmit_packet+0x298/0x460 [ 77.440086][ T4759] dccp_write_xmit+0x118/0x1d0 [ 77.440790][ T4759] dccp_sendmsg+0x510/0x850 [ 77.441473][ T4759] inet_sendmsg+0x154/0x27c [ 77.442222][ T4759] __sys_sendto+0x30c/0x420 [ 77.442983][ T4759] __arm64_sys_sendto+0xe4/0x104 [ 77.443769][ T4759] invoke_syscall+0x98/0x28c [ 77.444513][ T4759] el0_svc_common+0x13c/0x258 [ 77.445281][ T4759] do_el0_svc+0x5c/0x140 [ 77.445949][ T4759] el0_svc+0x78/0x1d0 [ 77.446640][ T4759] el0t_64_sync_handler+0xcc/0xe4 [ 77.447458][ T4759] el0t_64_sync+0x1a0/0x1a4 [ 77.448538][ T4759] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.450411][ T4759] CPU: 1 PID: 4759 Comm: syz.0.49 Not tainted syzkaller #0 [ 77.451505][ T4759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.452930][ T4759] Call trace: [ 77.453401][ T4759] dump_backtrace+0x0/0x458 [ 77.454026][ T4759] show_stack+0x2c/0x3c [ 77.454646][ T4759] __dump_stack+0x30/0x40 [ 77.455313][ T4759] dump_stack_lvl+0xf4/0x15c [ 77.456075][ T4759] dump_stack+0x1c/0x5c [ 77.456782][ T4759] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.457625][ T4759] dccp_xmit_packet+0x298/0x460 [ 77.458376][ T4759] dccp_write_xmit+0x118/0x1d0 [ 77.459109][ T4759] dccp_sendmsg+0x510/0x850 [ 77.459814][ T4759] inet_sendmsg+0x154/0x27c [ 77.460561][ T4759] __sys_sendto+0x30c/0x420 [ 77.461353][ T4759] __arm64_sys_sendto+0xe4/0x104 [ 77.462099][ T4759] invoke_syscall+0x98/0x28c [ 77.462805][ T4759] el0_svc_common+0x13c/0x258 [ 77.463576][ T4759] do_el0_svc+0x5c/0x140 [ 77.464290][ T4759] el0_svc+0x78/0x1d0 [ 77.464926][ T4759] el0t_64_sync_handler+0xcc/0xe4 [ 77.465668][ T4759] el0t_64_sync+0x1a0/0x1a4 [ 77.466472][ T4759] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.468232][ T4759] CPU: 1 PID: 4759 Comm: syz.0.49 Not tainted syzkaller #0 [ 77.469346][ T4759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.470901][ T4759] Call trace: [ 77.471447][ T4759] dump_backtrace+0x0/0x458 [ 77.472135][ T4759] show_stack+0x2c/0x3c [ 77.472723][ T4759] __dump_stack+0x30/0x40 [ 77.473350][ T4759] dump_stack_lvl+0xf4/0x15c [ 77.474045][ T4759] dump_stack+0x1c/0x5c [ 77.474636][ T4759] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.475408][ T4759] dccp_xmit_packet+0x298/0x460 [ 77.476149][ T4759] dccp_write_xmit+0x118/0x1d0 [ 77.476862][ T4759] dccp_sendmsg+0x510/0x850 [ 77.477508][ T4759] inet_sendmsg+0x154/0x27c [ 77.478201][ T4759] __sys_sendto+0x30c/0x420 [ 77.478907][ T4759] __arm64_sys_sendto+0xe4/0x104 [ 77.479703][ T4759] invoke_syscall+0x98/0x28c [ 77.480456][ T4759] el0_svc_common+0x13c/0x258 [ 77.481231][ T4759] do_el0_svc+0x5c/0x140 [ 77.481924][ T4759] el0_svc+0x78/0x1d0 [ 77.482558][ T4759] el0t_64_sync_handler+0xcc/0xe4 [ 77.483363][ T4759] el0t_64_sync+0x1a0/0x1a4 [ 77.484239][ T4759] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.485961][ T4759] CPU: 1 PID: 4759 Comm: syz.0.49 Not tainted syzkaller #0 [ 77.487074][ T4759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.488438][ T4759] Call trace: [ 77.488920][ T4759] dump_backtrace+0x0/0x458 [ 77.489655][ T4759] show_stack+0x2c/0x3c [ 77.490363][ T4759] __dump_stack+0x30/0x40 [ 77.491016][ T4759] dump_stack_lvl+0xf4/0x15c [ 77.491797][ T4759] dump_stack+0x1c/0x5c [ 77.492499][ T4759] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.493425][ T4759] dccp_xmit_packet+0x298/0x460 [ 77.494216][ T4759] dccp_write_xmit+0x118/0x1d0 [ 77.494942][ T4759] dccp_sendmsg+0x510/0x850 [ 77.495705][ T4759] inet_sendmsg+0x154/0x27c [ 77.496410][ T4759] __sys_sendto+0x30c/0x420 [ 77.497153][ T4759] __arm64_sys_sendto+0xe4/0x104 [ 77.497929][ T4759] invoke_syscall+0x98/0x28c [ 77.498662][ T4759] el0_svc_common+0x13c/0x258 [ 77.499380][ T4759] do_el0_svc+0x5c/0x140 [ 77.500113][ T4759] el0_svc+0x78/0x1d0 [ 77.500783][ T4759] el0t_64_sync_handler+0xcc/0xe4 [ 77.501548][ T4759] el0t_64_sync+0x1a0/0x1a4 [ 77.502354][ T4759] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.504053][ T4759] CPU: 1 PID: 4759 Comm: syz.0.49 Not tainted syzkaller #0 [ 77.505116][ T4759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.506535][ T4759] Call trace: [ 77.507030][ T4759] dump_backtrace+0x0/0x458 [ 77.507711][ T4759] show_stack+0x2c/0x3c [ 77.508346][ T4759] __dump_stack+0x30/0x40 [ 77.509058][ T4759] dump_stack_lvl+0xf4/0x15c [ 77.509814][ T4759] dump_stack+0x1c/0x5c [ 77.510492][ T4759] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.511363][ T4759] dccp_xmit_packet+0x298/0x460 [ 77.512169][ T4759] dccp_write_xmit+0x118/0x1d0 [ 77.512924][ T4759] dccp_sendmsg+0x510/0x850 [ 77.513615][ T4759] inet_sendmsg+0x154/0x27c [ 77.514314][ T4759] __sys_sendto+0x30c/0x420 [ 77.514981][ T4759] __arm64_sys_sendto+0xe4/0x104 [ 77.515708][ T4759] invoke_syscall+0x98/0x28c [ 77.516399][ T4759] el0_svc_common+0x13c/0x258 [ 77.517140][ T4759] do_el0_svc+0x5c/0x140 [ 77.517798][ T4759] el0_svc+0x78/0x1d0 [ 77.518403][ T4759] el0t_64_sync_handler+0xcc/0xe4 [ 77.519157][ T4759] el0t_64_sync+0x1a0/0x1a4 [ 77.520072][ T4759] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.521790][ T4759] CPU: 1 PID: 4759 Comm: syz.0.49 Not tainted syzkaller #0 [ 77.522800][ T4759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.524304][ T4759] Call trace: [ 77.524780][ T4759] dump_backtrace+0x0/0x458 [ 77.525476][ T4759] show_stack+0x2c/0x3c [ 77.526123][ T4759] __dump_stack+0x30/0x40 [ 77.526861][ T4759] dump_stack_lvl+0xf4/0x15c [ 77.527537][ T4759] dump_stack+0x1c/0x5c [ 77.528128][ T4759] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.528918][ T4759] dccp_xmit_packet+0x298/0x460 [ 77.529649][ T4759] dccp_write_xmit+0x118/0x1d0 [ 77.530392][ T4759] dccp_sendmsg+0x510/0x850 [ 77.531122][ T4759] inet_sendmsg+0x154/0x27c [ 77.531803][ T4759] __sys_sendto+0x30c/0x420 [ 77.532452][ T4759] __arm64_sys_sendto+0xe4/0x104 [ 77.533255][ T4759] invoke_syscall+0x98/0x28c [ 77.533987][ T4759] el0_svc_common+0x13c/0x258 [ 77.534734][ T4759] do_el0_svc+0x5c/0x140 [ 77.535441][ T4759] el0_svc+0x78/0x1d0 [ 77.536158][ T4759] el0t_64_sync_handler+0xcc/0xe4 [ 77.536974][ T4759] el0t_64_sync+0x1a0/0x1a4 [ 77.537955][ T4759] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.539758][ T4759] CPU: 1 PID: 4759 Comm: syz.0.49 Not tainted syzkaller #0 [ 77.540834][ T4759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.542182][ T4759] Call trace: [ 77.542628][ T4759] dump_backtrace+0x0/0x458 [ 77.543288][ T4759] show_stack+0x2c/0x3c [ 77.543884][ T4759] __dump_stack+0x30/0x40 [ 77.544518][ T4759] dump_stack_lvl+0xf4/0x15c [ 77.545160][ T4759] dump_stack+0x1c/0x5c [ 77.545813][ T4759] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.546669][ T4759] dccp_xmit_packet+0x298/0x460 [ 77.547386][ T4759] dccp_write_xmit+0x118/0x1d0 [ 77.548077][ T4759] dccp_sendmsg+0x510/0x850 [ 77.548886][ T4759] inet_sendmsg+0x154/0x27c [ 77.549602][ T4759] __sys_sendto+0x30c/0x420 [ 77.550377][ T4759] __arm64_sys_sendto+0xe4/0x104 [ 77.551212][ T4759] invoke_syscall+0x98/0x28c [ 77.551983][ T4759] el0_svc_common+0x13c/0x258 [ 77.552737][ T4759] do_el0_svc+0x5c/0x140 [ 77.553458][ T4759] el0_svc+0x78/0x1d0 [ 77.554103][ T4759] el0t_64_sync_handler+0xcc/0xe4 [ 77.554911][ T4759] el0t_64_sync+0x1a0/0x1a4 [ 77.556024][ T4759] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.557654][ T4759] CPU: 1 PID: 4759 Comm: syz.0.49 Not tainted syzkaller #0 [ 77.558710][ T4759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.560326][ T4759] Call trace: [ 77.560850][ T4759] dump_backtrace+0x0/0x458 [ 77.561608][ T4759] show_stack+0x2c/0x3c [ 77.562289][ T4759] __dump_stack+0x30/0x40 [ 77.563023][ T4759] dump_stack_lvl+0xf4/0x15c [ 77.563713][ T4759] dump_stack+0x1c/0x5c [ 77.564324][ T4759] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.565124][ T4759] dccp_xmit_packet+0x298/0x460 [ 77.565923][ T4759] dccp_write_xmit+0x118/0x1d0 [ 77.566645][ T4759] dccp_sendmsg+0x510/0x850 [ 77.567347][ T4759] inet_sendmsg+0x154/0x27c [ 77.568024][ T4759] __sys_sendto+0x30c/0x420 [ 77.568717][ T4759] __arm64_sys_sendto+0xe4/0x104 [ 77.569579][ T4759] invoke_syscall+0x98/0x28c [ 77.570345][ T4759] el0_svc_common+0x13c/0x258 [ 77.571080][ T4759] do_el0_svc+0x5c/0x140 [ 77.571770][ T4759] el0_svc+0x78/0x1d0 [ 77.572444][ T4759] el0t_64_sync_handler+0xcc/0xe4 [ 77.573194][ T4759] el0t_64_sync+0x1a0/0x1a4 [ 77.574036][ T4759] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.575648][ T4759] CPU: 1 PID: 4759 Comm: syz.0.49 Not tainted syzkaller #0 [ 77.576651][ T4759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.578154][ T4759] Call trace: [ 77.578695][ T4759] dump_backtrace+0x0/0x458 [ 77.579446][ T4759] show_stack+0x2c/0x3c [ 77.580104][ T4759] __dump_stack+0x30/0x40 [ 77.580863][ T4759] dump_stack_lvl+0xf4/0x15c [ 77.581655][ T4759] dump_stack+0x1c/0x5c [ 77.582302][ T4759] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.583123][ T4759] dccp_xmit_packet+0x298/0x460 [ 77.583901][ T4759] dccp_write_xmit+0x118/0x1d0 [ 77.584702][ T4759] dccp_sendmsg+0x510/0x850 [ 77.585384][ T4759] inet_sendmsg+0x154/0x27c [ 77.586061][ T4759] __sys_sendto+0x30c/0x420 [ 77.586704][ T4759] __arm64_sys_sendto+0xe4/0x104 [ 77.587461][ T4759] invoke_syscall+0x98/0x28c [ 77.588176][ T4759] el0_svc_common+0x13c/0x258 [ 77.588982][ T4759] do_el0_svc+0x5c/0x140 [ 77.589670][ T4759] el0_svc+0x78/0x1d0 [ 77.590274][ T4759] el0t_64_sync_handler+0xcc/0xe4 [ 77.591012][ T4759] el0t_64_sync+0x1a0/0x1a4 [ 77.591842][ T4759] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.593407][ T4759] CPU: 1 PID: 4759 Comm: syz.0.49 Not tainted syzkaller #0 [ 77.594409][ T4759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.595805][ T4759] Call trace: [ 77.596266][ T4759] dump_backtrace+0x0/0x458 [ 77.597001][ T4759] show_stack+0x2c/0x3c [ 77.597639][ T4759] __dump_stack+0x30/0x40 [ 77.598333][ T4759] dump_stack_lvl+0xf4/0x15c [ 77.599053][ T4759] dump_stack+0x1c/0x5c [ 77.599720][ T4759] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.600621][ T4759] dccp_xmit_packet+0x298/0x460 [ 77.601353][ T4759] dccp_write_xmit+0x118/0x1d0 [ 77.602070][ T4759] dccp_sendmsg+0x510/0x850 [ 77.602787][ T4759] inet_sendmsg+0x154/0x27c [ 77.603483][ T4759] __sys_sendto+0x30c/0x420 [ 77.604236][ T4759] __arm64_sys_sendto+0xe4/0x104 [ 77.605095][ T4759] invoke_syscall+0x98/0x28c [ 77.605835][ T4759] el0_svc_common+0x13c/0x258 [ 77.606578][ T4759] do_el0_svc+0x5c/0x140 [ 77.607262][ T4759] el0_svc+0x78/0x1d0 [ 77.607888][ T4759] el0t_64_sync_handler+0xcc/0xe4 [ 77.608662][ T4759] el0t_64_sync+0x1a0/0x1a4 [ 77.625293][ T4761] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.626999][ T4761] CPU: 1 PID: 4761 Comm: syz.0.50 Not tainted syzkaller #0 [ 77.628042][ T4761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.629579][ T4761] Call trace: [ 77.630124][ T4761] dump_backtrace+0x0/0x458 [ 77.630806][ T4761] show_stack+0x2c/0x3c [ 77.631452][ T4761] __dump_stack+0x30/0x40 [ 77.632095][ T4761] dump_stack_lvl+0xf4/0x15c [ 77.632791][ T4761] dump_stack+0x1c/0x5c [ 77.633394][ T4761] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.634286][ T4761] dccp_xmit_packet+0x298/0x460 [ 77.635076][ T4761] dccp_write_xmit+0x118/0x1d0 [ 77.635806][ T4761] dccp_sendmsg+0x510/0x850 [ 77.636559][ T4761] inet_sendmsg+0x154/0x27c [ 77.637270][ T4761] __sys_sendto+0x30c/0x420 [ 77.638003][ T4761] __arm64_sys_sendto+0xe4/0x104 [ 77.638847][ T4761] invoke_syscall+0x98/0x28c [ 77.639532][ T4761] el0_svc_common+0x13c/0x258 [ 77.640268][ T4761] do_el0_svc+0x5c/0x140 [ 77.640974][ T4761] el0_svc+0x78/0x1d0 [ 77.641632][ T4761] el0t_64_sync_handler+0xcc/0xe4 [ 77.642392][ T4761] el0t_64_sync+0x1a0/0x1a4 [ 77.643332][ T4761] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.644901][ T4761] CPU: 1 PID: 4761 Comm: syz.0.50 Not tainted syzkaller #0 [ 77.645958][ T4761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.647411][ T4761] Call trace: [ 77.647861][ T4761] dump_backtrace+0x0/0x458 [ 77.648552][ T4761] show_stack+0x2c/0x3c [ 77.649191][ T4761] __dump_stack+0x30/0x40 [ 77.649874][ T4761] dump_stack_lvl+0xf4/0x15c [ 77.650586][ T4761] dump_stack+0x1c/0x5c [ 77.651242][ T4761] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.652112][ T4761] dccp_xmit_packet+0x298/0x460 [ 77.652856][ T4761] dccp_write_xmit+0x118/0x1d0 [ 77.653568][ T4761] dccp_sendmsg+0x510/0x850 [ 77.654293][ T4761] inet_sendmsg+0x154/0x27c [ 77.654984][ T4761] __sys_sendto+0x30c/0x420 [ 77.655690][ T4761] __arm64_sys_sendto+0xe4/0x104 [ 77.656453][ T4761] invoke_syscall+0x98/0x28c [ 77.657158][ T4761] el0_svc_common+0x13c/0x258 [ 77.657846][ T4761] do_el0_svc+0x5c/0x140 [ 77.658486][ T4761] el0_svc+0x78/0x1d0 [ 77.659090][ T4761] el0t_64_sync_handler+0xcc/0xe4 [ 77.659841][ T4761] el0t_64_sync+0x1a0/0x1a4 [ 77.660713][ T4761] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.662314][ T4761] CPU: 1 PID: 4761 Comm: syz.0.50 Not tainted syzkaller #0 [ 77.663315][ T4761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.664759][ T4761] Call trace: [ 77.665287][ T4761] dump_backtrace+0x0/0x458 [ 77.665931][ T4761] show_stack+0x2c/0x3c [ 77.666496][ T4761] __dump_stack+0x30/0x40 [ 77.667140][ T4761] dump_stack_lvl+0xf4/0x15c [ 77.667862][ T4761] dump_stack+0x1c/0x5c [ 77.668468][ T4761] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.669318][ T4761] dccp_xmit_packet+0x298/0x460 [ 77.669991][ T4761] dccp_write_xmit+0x118/0x1d0 [ 77.670746][ T4761] dccp_sendmsg+0x510/0x850 [ 77.671437][ T4761] inet_sendmsg+0x154/0x27c [ 77.672129][ T4761] __sys_sendto+0x30c/0x420 [ 77.672799][ T4761] __arm64_sys_sendto+0xe4/0x104 [ 77.673542][ T4761] invoke_syscall+0x98/0x28c [ 77.674231][ T4761] el0_svc_common+0x13c/0x258 [ 77.674928][ T4761] do_el0_svc+0x5c/0x140 [ 77.675568][ T4761] el0_svc+0x78/0x1d0 [ 77.676156][ T4761] el0t_64_sync_handler+0xcc/0xe4 [ 77.676880][ T4761] el0t_64_sync+0x1a0/0x1a4 [ 77.679034][ T4761] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.680757][ T4761] CPU: 1 PID: 4761 Comm: syz.0.50 Not tainted syzkaller #0 [ 77.681854][ T4761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.683270][ T4761] Call trace: [ 77.683751][ T4761] dump_backtrace+0x0/0x458 [ 77.684428][ T4761] show_stack+0x2c/0x3c [ 77.685104][ T4761] __dump_stack+0x30/0x40 [ 77.685842][ T4761] dump_stack_lvl+0xf4/0x15c [ 77.686497][ T4761] dump_stack+0x1c/0x5c [ 77.687121][ T4761] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.687861][ T4761] dccp_xmit_packet+0x298/0x460 [ 77.688639][ T4761] dccp_write_xmit+0x118/0x1d0 [ 77.689395][ T4761] dccp_sendmsg+0x510/0x850 [ 77.690140][ T4761] inet_sendmsg+0x154/0x27c [ 77.690880][ T4761] __sys_sendto+0x30c/0x420 [ 77.691722][ T4761] __arm64_sys_sendto+0xe4/0x104 [ 77.692500][ T4761] invoke_syscall+0x98/0x28c [ 77.693235][ T4761] el0_svc_common+0x13c/0x258 [ 77.694009][ T4761] do_el0_svc+0x5c/0x140 [ 77.694685][ T4761] el0_svc+0x78/0x1d0 [ 77.695337][ T4761] el0t_64_sync_handler+0xcc/0xe4 [ 77.696116][ T4761] el0t_64_sync+0x1a0/0x1a4 [ 77.696944][ T4761] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.698615][ T4761] CPU: 1 PID: 4761 Comm: syz.0.50 Not tainted syzkaller #0 [ 77.699721][ T4761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.701314][ T4761] Call trace: [ 77.701783][ T4761] dump_backtrace+0x0/0x458 [ 77.702401][ T4761] show_stack+0x2c/0x3c [ 77.703006][ T4761] __dump_stack+0x30/0x40 [ 77.703686][ T4761] dump_stack_lvl+0xf4/0x15c [ 77.704534][ T4761] dump_stack+0x1c/0x5c [ 77.705136][ T4761] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.705959][ T4761] dccp_xmit_packet+0x298/0x460 [ 77.706692][ T4761] dccp_write_xmit+0x118/0x1d0 [ 77.707422][ T4761] dccp_sendmsg+0x510/0x850 [ 77.708086][ T4761] inet_sendmsg+0x154/0x27c [ 77.708813][ T4761] __sys_sendto+0x30c/0x420 [ 77.709560][ T4761] __arm64_sys_sendto+0xe4/0x104 [ 77.710364][ T4761] invoke_syscall+0x98/0x28c [ 77.711076][ T4761] el0_svc_common+0x13c/0x258 [ 77.711860][ T4761] do_el0_svc+0x5c/0x140 [ 77.712554][ T4761] el0_svc+0x78/0x1d0 [ 77.713182][ T4761] el0t_64_sync_handler+0xcc/0xe4 [ 77.713931][ T4761] el0t_64_sync+0x1a0/0x1a4 [ 77.714892][ T4761] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.716620][ T4761] CPU: 1 PID: 4761 Comm: syz.0.50 Not tainted syzkaller #0 [ 77.717757][ T4761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.719311][ T4761] Call trace: [ 77.719846][ T4761] dump_backtrace+0x0/0x458 [ 77.720563][ T4761] show_stack+0x2c/0x3c [ 77.721225][ T4761] __dump_stack+0x30/0x40 [ 77.721874][ T4761] dump_stack_lvl+0xf4/0x15c [ 77.722617][ T4761] dump_stack+0x1c/0x5c [ 77.723239][ T4761] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.724147][ T4761] dccp_xmit_packet+0x298/0x460 [ 77.724907][ T4761] dccp_write_xmit+0x118/0x1d0 [ 77.725587][ T4761] dccp_sendmsg+0x510/0x850 [ 77.726338][ T4761] inet_sendmsg+0x154/0x27c [ 77.727004][ T4761] __sys_sendto+0x30c/0x420 [ 77.727663][ T4761] __arm64_sys_sendto+0xe4/0x104 [ 77.728424][ T4761] invoke_syscall+0x98/0x28c [ 77.729123][ T4761] el0_svc_common+0x13c/0x258 [ 77.729918][ T4761] do_el0_svc+0x5c/0x140 [ 77.730548][ T4761] el0_svc+0x78/0x1d0 [ 77.731147][ T4761] el0t_64_sync_handler+0xcc/0xe4 [ 77.731923][ T4761] el0t_64_sync+0x1a0/0x1a4 [ 77.732801][ T4761] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.734369][ T4761] CPU: 1 PID: 4761 Comm: syz.0.50 Not tainted syzkaller #0 [ 77.735450][ T4761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.736906][ T4761] Call trace: [ 77.737352][ T4761] dump_backtrace+0x0/0x458 [ 77.738003][ T4761] show_stack+0x2c/0x3c [ 77.738740][ T4761] __dump_stack+0x30/0x40 [ 77.739398][ T4761] dump_stack_lvl+0xf4/0x15c [ 77.740094][ T4761] dump_stack+0x1c/0x5c [ 77.740760][ T4761] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.741598][ T4761] dccp_xmit_packet+0x298/0x460 [ 77.742362][ T4761] dccp_write_xmit+0x118/0x1d0 [ 77.743113][ T4761] dccp_sendmsg+0x510/0x850 [ 77.743760][ T4761] inet_sendmsg+0x154/0x27c [ 77.744432][ T4761] __sys_sendto+0x30c/0x420 [ 77.745142][ T4761] __arm64_sys_sendto+0xe4/0x104 [ 77.745971][ T4761] invoke_syscall+0x98/0x28c [ 77.746677][ T4761] el0_svc_common+0x13c/0x258 [ 77.747412][ T4761] do_el0_svc+0x5c/0x140 [ 77.748096][ T4761] el0_svc+0x78/0x1d0 [ 77.748724][ T4761] el0t_64_sync_handler+0xcc/0xe4 [ 77.749550][ T4761] el0t_64_sync+0x1a0/0x1a4 [ 77.750506][ T4761] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.752077][ T4761] CPU: 1 PID: 4761 Comm: syz.0.50 Not tainted syzkaller #0 [ 77.753228][ T4761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.754692][ T4761] Call trace: [ 77.755124][ T4761] dump_backtrace+0x0/0x458 [ 77.755736][ T4761] show_stack+0x2c/0x3c [ 77.756381][ T4761] __dump_stack+0x30/0x40 [ 77.756993][ T4761] dump_stack_lvl+0xf4/0x15c [ 77.757654][ T4761] dump_stack+0x1c/0x5c [ 77.758230][ T4761] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.759143][ T4761] dccp_xmit_packet+0x298/0x460 [ 77.759844][ T4761] dccp_write_xmit+0x118/0x1d0 [ 77.760615][ T4761] dccp_sendmsg+0x510/0x850 [ 77.761359][ T4761] inet_sendmsg+0x154/0x27c [ 77.762084][ T4761] __sys_sendto+0x30c/0x420 [ 77.762810][ T4761] __arm64_sys_sendto+0xe4/0x104 [ 77.763559][ T4761] invoke_syscall+0x98/0x28c [ 77.764309][ T4761] el0_svc_common+0x13c/0x258 [ 77.765051][ T4761] do_el0_svc+0x5c/0x140 [ 77.765719][ T4761] el0_svc+0x78/0x1d0 [ 77.766359][ T4761] el0t_64_sync_handler+0xcc/0xe4 [ 77.767174][ T4761] el0t_64_sync+0x1a0/0x1a4 [ 77.768060][ T4761] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.769911][ T4761] CPU: 1 PID: 4761 Comm: syz.0.50 Not tainted syzkaller #0 [ 77.770980][ T4761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.772554][ T4761] Call trace: [ 77.773066][ T4761] dump_backtrace+0x0/0x458 [ 77.773778][ T4761] show_stack+0x2c/0x3c [ 77.774411][ T4761] __dump_stack+0x30/0x40 [ 77.775086][ T4761] dump_stack_lvl+0xf4/0x15c [ 77.775763][ T4761] dump_stack+0x1c/0x5c [ 77.776381][ T4761] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.777173][ T4761] dccp_xmit_packet+0x298/0x460 [ 77.777925][ T4761] dccp_write_xmit+0x118/0x1d0 [ 77.778619][ T4761] dccp_sendmsg+0x510/0x850 [ 77.779282][ T4761] inet_sendmsg+0x154/0x27c [ 77.780051][ T4761] __sys_sendto+0x30c/0x420 [ 77.780744][ T4761] __arm64_sys_sendto+0xe4/0x104 [ 77.781565][ T4761] invoke_syscall+0x98/0x28c [ 77.782312][ T4761] el0_svc_common+0x13c/0x258 [ 77.783056][ T4761] do_el0_svc+0x5c/0x140 [ 77.783728][ T4761] el0_svc+0x78/0x1d0 [ 77.784390][ T4761] el0t_64_sync_handler+0xcc/0xe4 [ 77.785196][ T4761] el0t_64_sync+0x1a0/0x1a4 [ 77.786024][ T4761] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.787639][ T4761] CPU: 1 PID: 4761 Comm: syz.0.50 Not tainted syzkaller #0 [ 77.788724][ T4761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.790240][ T4761] Call trace: [ 77.790786][ T4761] dump_backtrace+0x0/0x458 [ 77.791508][ T4761] show_stack+0x2c/0x3c [ 77.792181][ T4761] __dump_stack+0x30/0x40 [ 77.792805][ T4761] dump_stack_lvl+0xf4/0x15c [ 77.793503][ T4761] dump_stack+0x1c/0x5c [ 77.794129][ T4761] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.795038][ T4761] dccp_xmit_packet+0x298/0x460 [ 77.795775][ T4761] dccp_write_xmit+0x118/0x1d0 [ 77.796534][ T4761] dccp_sendmsg+0x510/0x850 [ 77.797228][ T4761] inet_sendmsg+0x154/0x27c [ 77.797930][ T4761] __sys_sendto+0x30c/0x420 [ 77.798677][ T4761] __arm64_sys_sendto+0xe4/0x104 [ 77.799405][ T4761] invoke_syscall+0x98/0x28c [ 77.800138][ T4761] el0_svc_common+0x13c/0x258 [ 77.800933][ T4761] do_el0_svc+0x5c/0x140 [ 77.801649][ T4761] el0_svc+0x78/0x1d0 [ 77.802269][ T4761] el0t_64_sync_handler+0xcc/0xe4 [ 77.803138][ T4761] el0t_64_sync+0x1a0/0x1a4 [ 77.803952][ T4761] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.805628][ T4761] CPU: 1 PID: 4761 Comm: syz.0.50 Not tainted syzkaller #0 [ 77.806794][ T4761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.808568][ T4761] Call trace: [ 77.809112][ T4761] dump_backtrace+0x0/0x458 [ 77.809802][ T4761] show_stack+0x2c/0x3c [ 77.810504][ T4761] __dump_stack+0x30/0x40 [ 77.811211][ T4761] dump_stack_lvl+0xf4/0x15c [ 77.811925][ T4761] dump_stack+0x1c/0x5c [ 77.812554][ T4761] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.813444][ T4761] dccp_xmit_packet+0x298/0x460 [ 77.814194][ T4761] dccp_write_xmit+0x118/0x1d0 [ 77.814965][ T4761] dccp_sendmsg+0x510/0x850 [ 77.815689][ T4761] inet_sendmsg+0x154/0x27c [ 77.816353][ T4761] __sys_sendto+0x30c/0x420 [ 77.817051][ T4761] __arm64_sys_sendto+0xe4/0x104 [ 77.817773][ T4761] invoke_syscall+0x98/0x28c [ 77.818522][ T4761] el0_svc_common+0x13c/0x258 [ 77.819298][ T4761] do_el0_svc+0x5c/0x140 [ 77.820002][ T4761] el0_svc+0x78/0x1d0 [ 77.820587][ T4761] el0t_64_sync_handler+0xcc/0xe4 [ 77.821399][ T4761] el0t_64_sync+0x1a0/0x1a4 [ 77.822534][ T4761] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.824246][ T4761] CPU: 1 PID: 4761 Comm: syz.0.50 Not tainted syzkaller #0 [ 77.825425][ T4761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.826912][ T4761] Call trace: [ 77.827407][ T4761] dump_backtrace+0x0/0x458 [ 77.828059][ T4761] show_stack+0x2c/0x3c [ 77.828744][ T4761] __dump_stack+0x30/0x40 [ 77.829405][ T4761] dump_stack_lvl+0xf4/0x15c [ 77.830120][ T4761] dump_stack+0x1c/0x5c [ 77.830843][ T4761] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.831719][ T4761] dccp_xmit_packet+0x298/0x460 [ 77.832482][ T4761] dccp_write_xmit+0x118/0x1d0 [ 77.833258][ T4761] dccp_sendmsg+0x510/0x850 [ 77.833967][ T4761] inet_sendmsg+0x154/0x27c [ 77.834680][ T4761] __sys_sendto+0x30c/0x420 [ 77.835415][ T4761] __arm64_sys_sendto+0xe4/0x104 [ 77.836257][ T4761] invoke_syscall+0x98/0x28c [ 77.836933][ T4761] el0_svc_common+0x13c/0x258 [ 77.837717][ T4761] do_el0_svc+0x5c/0x140 [ 77.838365][ T4761] el0_svc+0x78/0x1d0 [ 77.838983][ T4761] el0t_64_sync_handler+0xcc/0xe4 [ 77.839790][ T4761] el0t_64_sync+0x1a0/0x1a4 [ 77.840699][ T4761] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.842487][ T4761] CPU: 1 PID: 4761 Comm: syz.0.50 Not tainted syzkaller #0 [ 77.843580][ T4761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.845116][ T4761] Call trace: [ 77.845651][ T4761] dump_backtrace+0x0/0x458 [ 77.846328][ T4761] show_stack+0x2c/0x3c [ 77.846928][ T4761] __dump_stack+0x30/0x40 [ 77.847499][ T4761] dump_stack_lvl+0xf4/0x15c [ 77.848184][ T4761] dump_stack+0x1c/0x5c [ 77.848824][ T4761] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.849604][ T4761] dccp_xmit_packet+0x298/0x460 [ 77.850341][ T4761] dccp_write_xmit+0x118/0x1d0 [ 77.851051][ T4761] dccp_sendmsg+0x510/0x850 [ 77.851729][ T4761] inet_sendmsg+0x154/0x27c [ 77.852403][ T4761] __sys_sendto+0x30c/0x420 [ 77.853095][ T4761] __arm64_sys_sendto+0xe4/0x104 [ 77.853827][ T4761] invoke_syscall+0x98/0x28c [ 77.854495][ T4761] el0_svc_common+0x13c/0x258 [ 77.855190][ T4761] do_el0_svc+0x5c/0x140 [ 77.855818][ T4761] el0_svc+0x78/0x1d0 [ 77.856533][ T4761] el0t_64_sync_handler+0xcc/0xe4 [ 77.857308][ T4761] el0t_64_sync+0x1a0/0x1a4 [ 77.858240][ T4761] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.859773][ T4761] CPU: 1 PID: 4761 Comm: syz.0.50 Not tainted syzkaller #0 [ 77.860824][ T4761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.862196][ T4761] Call trace: [ 77.862632][ T4761] dump_backtrace+0x0/0x458 [ 77.863249][ T4761] show_stack+0x2c/0x3c [ 77.863818][ T4761] __dump_stack+0x30/0x40 [ 77.864407][ T4761] dump_stack_lvl+0xf4/0x15c [ 77.865036][ T4761] dump_stack+0x1c/0x5c [ 77.865654][ T4761] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.866432][ T4761] dccp_xmit_packet+0x298/0x460 [ 77.867140][ T4761] dccp_write_xmit+0x118/0x1d0 [ 77.867855][ T4761] dccp_sendmsg+0x510/0x850 [ 77.868503][ T4761] inet_sendmsg+0x154/0x27c [ 77.869157][ T4761] __sys_sendto+0x30c/0x420 [ 77.869903][ T4761] __arm64_sys_sendto+0xe4/0x104 [ 77.870640][ T4761] invoke_syscall+0x98/0x28c [ 77.871353][ T4761] el0_svc_common+0x13c/0x258 [ 77.872108][ T4761] do_el0_svc+0x5c/0x140 [ 77.872795][ T4761] el0_svc+0x78/0x1d0 [ 77.873399][ T4761] el0t_64_sync_handler+0xcc/0xe4 [ 77.874191][ T4761] el0t_64_sync+0x1a0/0x1a4 [ 77.875009][ T4761] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.876630][ T4761] CPU: 1 PID: 4761 Comm: syz.0.50 Not tainted syzkaller #0 [ 77.877699][ T4761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.879208][ T4761] Call trace: [ 77.879671][ T4761] dump_backtrace+0x0/0x458 [ 77.880307][ T4761] show_stack+0x2c/0x3c [ 77.880937][ T4761] __dump_stack+0x30/0x40 [ 77.881555][ T4761] dump_stack_lvl+0xf4/0x15c [ 77.882354][ T4761] dump_stack+0x1c/0x5c [ 77.883025][ T4761] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.884018][ T4761] dccp_xmit_packet+0x298/0x460 [ 77.884826][ T4761] dccp_write_xmit+0x118/0x1d0 [ 77.885592][ T4761] dccp_sendmsg+0x510/0x850 [ 77.886290][ T4761] inet_sendmsg+0x154/0x27c [ 77.887008][ T4761] __sys_sendto+0x30c/0x420 [ 77.887701][ T4761] __arm64_sys_sendto+0xe4/0x104 [ 77.888526][ T4761] invoke_syscall+0x98/0x28c [ 77.889268][ T4761] el0_svc_common+0x13c/0x258 [ 77.890028][ T4761] do_el0_svc+0x5c/0x140 [ 77.890645][ T4761] el0_svc+0x78/0x1d0 [ 77.891253][ T4761] el0t_64_sync_handler+0xcc/0xe4 [ 77.892038][ T4761] el0t_64_sync+0x1a0/0x1a4 [ 77.892932][ T4761] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.894670][ T4761] CPU: 1 PID: 4761 Comm: syz.0.50 Not tainted syzkaller #0 [ 77.895760][ T4761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.897390][ T4761] Call trace: [ 77.897884][ T4761] dump_backtrace+0x0/0x458 [ 77.898520][ T4761] show_stack+0x2c/0x3c [ 77.899206][ T4761] __dump_stack+0x30/0x40 [ 77.899935][ T4761] dump_stack_lvl+0xf4/0x15c [ 77.900688][ T4761] dump_stack+0x1c/0x5c [ 77.901386][ T4761] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.902186][ T4761] dccp_xmit_packet+0x298/0x460 [ 77.902913][ T4761] dccp_write_xmit+0x118/0x1d0 [ 77.903719][ T4761] dccp_sendmsg+0x510/0x850 [ 77.904440][ T4761] inet_sendmsg+0x154/0x27c [ 77.905232][ T4761] __sys_sendto+0x30c/0x420 [ 77.905952][ T4761] __arm64_sys_sendto+0xe4/0x104 [ 77.906738][ T4761] invoke_syscall+0x98/0x28c [ 77.907498][ T4761] el0_svc_common+0x13c/0x258 [ 77.908215][ T4761] do_el0_svc+0x5c/0x140 [ 77.908870][ T4761] el0_svc+0x78/0x1d0 [ 77.909520][ T4761] el0t_64_sync_handler+0xcc/0xe4 [ 77.910390][ T4761] el0t_64_sync+0x1a0/0x1a4 [ 77.927886][ T4763] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.929710][ T4763] CPU: 1 PID: 4763 Comm: syz.0.51 Not tainted syzkaller #0 [ 77.930788][ T4763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.932305][ T4763] Call trace: [ 77.932803][ T4763] dump_backtrace+0x0/0x458 [ 77.933483][ T4763] show_stack+0x2c/0x3c [ 77.934140][ T4763] __dump_stack+0x30/0x40 [ 77.934786][ T4763] dump_stack_lvl+0xf4/0x15c [ 77.935479][ T4763] dump_stack+0x1c/0x5c [ 77.936075][ T4763] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.936912][ T4763] dccp_xmit_packet+0x298/0x460 [ 77.937651][ T4763] dccp_write_xmit+0x118/0x1d0 [ 77.938400][ T4763] dccp_sendmsg+0x510/0x850 [ 77.939111][ T4763] inet_sendmsg+0x154/0x27c [ 77.939803][ T4763] __sys_sendto+0x30c/0x420 [ 77.940510][ T4763] __arm64_sys_sendto+0xe4/0x104 [ 77.941157][ T4763] invoke_syscall+0x98/0x28c [ 77.941882][ T4763] el0_svc_common+0x13c/0x258 [ 77.942631][ T4763] do_el0_svc+0x5c/0x140 [ 77.943358][ T4763] el0_svc+0x78/0x1d0 [ 77.944043][ T4763] el0t_64_sync_handler+0xcc/0xe4 [ 77.944850][ T4763] el0t_64_sync+0x1a0/0x1a4 [ 77.946198][ T4763] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.947735][ T4763] CPU: 1 PID: 4763 Comm: syz.0.51 Not tainted syzkaller #0 [ 77.948896][ T4763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.950516][ T4763] Call trace: [ 77.951046][ T4763] dump_backtrace+0x0/0x458 [ 77.951747][ T4763] show_stack+0x2c/0x3c [ 77.952350][ T4763] __dump_stack+0x30/0x40 [ 77.952968][ T4763] dump_stack_lvl+0xf4/0x15c [ 77.953693][ T4763] dump_stack+0x1c/0x5c [ 77.954372][ T4763] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.955230][ T4763] dccp_xmit_packet+0x298/0x460 [ 77.955993][ T4763] dccp_write_xmit+0x118/0x1d0 [ 77.956722][ T4763] dccp_sendmsg+0x510/0x850 [ 77.957451][ T4763] inet_sendmsg+0x154/0x27c [ 77.958223][ T4763] __sys_sendto+0x30c/0x420 [ 77.958930][ T4763] __arm64_sys_sendto+0xe4/0x104 [ 77.959763][ T4763] invoke_syscall+0x98/0x28c [ 77.960536][ T4763] el0_svc_common+0x13c/0x258 [ 77.961216][ T4763] do_el0_svc+0x5c/0x140 [ 77.961932][ T4763] el0_svc+0x78/0x1d0 [ 77.962572][ T4763] el0t_64_sync_handler+0xcc/0xe4 [ 77.963403][ T4763] el0t_64_sync+0x1a0/0x1a4 [ 77.964353][ T4763] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.965992][ T4763] CPU: 1 PID: 4763 Comm: syz.0.51 Not tainted syzkaller #0 [ 77.967088][ T4763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.968696][ T4763] Call trace: [ 77.969159][ T4763] dump_backtrace+0x0/0x458 [ 77.969916][ T4763] show_stack+0x2c/0x3c [ 77.970609][ T4763] __dump_stack+0x30/0x40 [ 77.971281][ T4763] dump_stack_lvl+0xf4/0x15c [ 77.972030][ T4763] dump_stack+0x1c/0x5c [ 77.972716][ T4763] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.973598][ T4763] dccp_xmit_packet+0x298/0x460 [ 77.974404][ T4763] dccp_write_xmit+0x118/0x1d0 [ 77.975144][ T4763] dccp_sendmsg+0x510/0x850 [ 77.975832][ T4763] inet_sendmsg+0x154/0x27c [ 77.976518][ T4763] __sys_sendto+0x30c/0x420 [ 77.977224][ T4763] __arm64_sys_sendto+0xe4/0x104 [ 77.977927][ T4763] invoke_syscall+0x98/0x28c [ 77.978614][ T4763] el0_svc_common+0x13c/0x258 [ 77.979406][ T4763] do_el0_svc+0x5c/0x140 [ 77.980087][ T4763] el0_svc+0x78/0x1d0 [ 77.980676][ T4763] el0t_64_sync_handler+0xcc/0xe4 [ 77.981403][ T4763] el0t_64_sync+0x1a0/0x1a4 [ 77.982353][ T4763] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 77.984149][ T4763] CPU: 1 PID: 4763 Comm: syz.0.51 Not tainted syzkaller #0 [ 77.985236][ T4763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.986824][ T4763] Call trace: [ 77.987341][ T4763] dump_backtrace+0x0/0x458 [ 77.988039][ T4763] show_stack+0x2c/0x3c [ 77.988730][ T4763] __dump_stack+0x30/0x40 [ 77.989405][ T4763] dump_stack_lvl+0xf4/0x15c [ 77.990162][ T4763] dump_stack+0x1c/0x5c [ 77.990903][ T4763] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 77.991751][ T4763] dccp_xmit_packet+0x298/0x460 [ 77.992502][ T4763] dccp_write_xmit+0x118/0x1d0 [ 77.993252][ T4763] dccp_sendmsg+0x510/0x850 [ 77.994014][ T4763] inet_sendmsg+0x154/0x27c [ 77.994693][ T4763] __sys_sendto+0x30c/0x420 [ 77.995403][ T4763] __arm64_sys_sendto+0xe4/0x104 [ 77.996171][ T4763] invoke_syscall+0x98/0x28c [ 77.996885][ T4763] el0_svc_common+0x13c/0x258 [ 77.997624][ T4763] do_el0_svc+0x5c/0x140 [ 77.998256][ T4763] el0_svc+0x78/0x1d0 [ 77.998892][ T4763] el0t_64_sync_handler+0xcc/0xe4 [ 77.999737][ T4763] el0t_64_sync+0x1a0/0x1a4 [ 78.000642][ T4763] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.002295][ T4763] CPU: 1 PID: 4763 Comm: syz.0.51 Not tainted syzkaller #0 [ 78.003388][ T4763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.004891][ T4763] Call trace: [ 78.005360][ T4763] dump_backtrace+0x0/0x458 [ 78.006036][ T4763] show_stack+0x2c/0x3c [ 78.006657][ T4763] __dump_stack+0x30/0x40 [ 78.007341][ T4763] dump_stack_lvl+0xf4/0x15c [ 78.008058][ T4763] dump_stack+0x1c/0x5c [ 78.008696][ T4763] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.009654][ T4763] dccp_xmit_packet+0x298/0x460 [ 78.010409][ T4763] dccp_write_xmit+0x118/0x1d0 [ 78.011189][ T4763] dccp_sendmsg+0x510/0x850 [ 78.011996][ T4763] inet_sendmsg+0x154/0x27c [ 78.012748][ T4763] __sys_sendto+0x30c/0x420 [ 78.013472][ T4763] __arm64_sys_sendto+0xe4/0x104 [ 78.014245][ T4763] invoke_syscall+0x98/0x28c [ 78.014938][ T4763] el0_svc_common+0x13c/0x258 [ 78.015719][ T4763] do_el0_svc+0x5c/0x140 [ 78.016400][ T4763] el0_svc+0x78/0x1d0 [ 78.017020][ T4763] el0t_64_sync_handler+0xcc/0xe4 [ 78.017823][ T4763] el0t_64_sync+0x1a0/0x1a4 [ 78.018774][ T4763] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.020434][ T4763] CPU: 1 PID: 4763 Comm: syz.0.51 Not tainted syzkaller #0 [ 78.021505][ T4763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.022995][ T4763] Call trace: [ 78.023464][ T4763] dump_backtrace+0x0/0x458 [ 78.024129][ T4763] show_stack+0x2c/0x3c [ 78.024740][ T4763] __dump_stack+0x30/0x40 [ 78.025363][ T4763] dump_stack_lvl+0xf4/0x15c [ 78.026027][ T4763] dump_stack+0x1c/0x5c [ 78.026627][ T4763] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.027440][ T4763] dccp_xmit_packet+0x298/0x460 [ 78.028180][ T4763] dccp_write_xmit+0x118/0x1d0 [ 78.028906][ T4763] dccp_sendmsg+0x510/0x850 [ 78.029641][ T4763] inet_sendmsg+0x154/0x27c [ 78.030376][ T4763] __sys_sendto+0x30c/0x420 [ 78.031050][ T4763] __arm64_sys_sendto+0xe4/0x104 [ 78.031814][ T4763] invoke_syscall+0x98/0x28c [ 78.032523][ T4763] el0_svc_common+0x13c/0x258 [ 78.033285][ T4763] do_el0_svc+0x5c/0x140 [ 78.033963][ T4763] el0_svc+0x78/0x1d0 [ 78.034599][ T4763] el0t_64_sync_handler+0xcc/0xe4 [ 78.035441][ T4763] el0t_64_sync+0x1a0/0x1a4 [ 78.036343][ T4763] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.037959][ T4763] CPU: 1 PID: 4763 Comm: syz.0.51 Not tainted syzkaller #0 [ 78.039094][ T4763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.040686][ T4763] Call trace: [ 78.041248][ T4763] dump_backtrace+0x0/0x458 [ 78.042015][ T4763] show_stack+0x2c/0x3c [ 78.042733][ T4763] __dump_stack+0x30/0x40 [ 78.043418][ T4763] dump_stack_lvl+0xf4/0x15c [ 78.044171][ T4763] dump_stack+0x1c/0x5c [ 78.044854][ T4763] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.045707][ T4763] dccp_xmit_packet+0x298/0x460 [ 78.046539][ T4763] dccp_write_xmit+0x118/0x1d0 [ 78.047400][ T4763] dccp_sendmsg+0x510/0x850 [ 78.048050][ T4763] inet_sendmsg+0x154/0x27c [ 78.048769][ T4763] __sys_sendto+0x30c/0x420 [ 78.049488][ T4763] __arm64_sys_sendto+0xe4/0x104 [ 78.050258][ T4763] invoke_syscall+0x98/0x28c [ 78.050992][ T4763] el0_svc_common+0x13c/0x258 [ 78.051776][ T4763] do_el0_svc+0x5c/0x140 [ 78.052537][ T4763] el0_svc+0x78/0x1d0 [ 78.053170][ T4763] el0t_64_sync_handler+0xcc/0xe4 [ 78.054016][ T4763] el0t_64_sync+0x1a0/0x1a4 [ 78.054956][ T4763] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.056496][ T4763] CPU: 1 PID: 4763 Comm: syz.0.51 Not tainted syzkaller #0 [ 78.057602][ T4763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.059140][ T4763] Call trace: [ 78.059707][ T4763] dump_backtrace+0x0/0x458 [ 78.060484][ T4763] show_stack+0x2c/0x3c [ 78.061153][ T4763] __dump_stack+0x30/0x40 [ 78.061840][ T4763] dump_stack_lvl+0xf4/0x15c [ 78.062512][ T4763] dump_stack+0x1c/0x5c [ 78.063160][ T4763] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.064060][ T4763] dccp_xmit_packet+0x298/0x460 [ 78.064808][ T4763] dccp_write_xmit+0x118/0x1d0 [ 78.065587][ T4763] dccp_sendmsg+0x510/0x850 [ 78.066326][ T4763] inet_sendmsg+0x154/0x27c [ 78.066982][ T4763] __sys_sendto+0x30c/0x420 [ 78.067673][ T4763] __arm64_sys_sendto+0xe4/0x104 [ 78.068539][ T4763] invoke_syscall+0x98/0x28c [ 78.069271][ T4763] el0_svc_common+0x13c/0x258 [ 78.069999][ T4763] do_el0_svc+0x5c/0x140 [ 78.070697][ T4763] el0_svc+0x78/0x1d0 [ 78.071362][ T4763] el0t_64_sync_handler+0xcc/0xe4 [ 78.072145][ T4763] el0t_64_sync+0x1a0/0x1a4 [ 78.073160][ T4763] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.074750][ T4763] CPU: 1 PID: 4763 Comm: syz.0.51 Not tainted syzkaller #0 [ 78.075767][ T4763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.077234][ T4763] Call trace: [ 78.077715][ T4763] dump_backtrace+0x0/0x458 [ 78.078372][ T4763] show_stack+0x2c/0x3c [ 78.079105][ T4763] __dump_stack+0x30/0x40 [ 78.079784][ T4763] dump_stack_lvl+0xf4/0x15c [ 78.080518][ T4763] dump_stack+0x1c/0x5c [ 78.081178][ T4763] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.082071][ T4763] dccp_xmit_packet+0x298/0x460 [ 78.082902][ T4763] dccp_write_xmit+0x118/0x1d0 [ 78.083656][ T4763] dccp_sendmsg+0x510/0x850 [ 78.084399][ T4763] inet_sendmsg+0x154/0x27c [ 78.085075][ T4763] __sys_sendto+0x30c/0x420 [ 78.085785][ T4763] __arm64_sys_sendto+0xe4/0x104 [ 78.086558][ T4763] invoke_syscall+0x98/0x28c [ 78.087290][ T4763] el0_svc_common+0x13c/0x258 [ 78.088089][ T4763] do_el0_svc+0x5c/0x140 [ 78.088745][ T4763] el0_svc+0x78/0x1d0 [ 78.089387][ T4763] el0t_64_sync_handler+0xcc/0xe4 [ 78.090264][ T4763] el0t_64_sync+0x1a0/0x1a4 [ 78.091173][ T4763] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.092715][ T4763] CPU: 1 PID: 4763 Comm: syz.0.51 Not tainted syzkaller #0 [ 78.093732][ T4763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.095233][ T4763] Call trace: [ 78.095709][ T4763] dump_backtrace+0x0/0x458 [ 78.096347][ T4763] show_stack+0x2c/0x3c [ 78.096944][ T4763] __dump_stack+0x30/0x40 [ 78.097584][ T4763] dump_stack_lvl+0xf4/0x15c [ 78.098258][ T4763] dump_stack+0x1c/0x5c [ 78.098977][ T4763] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.099893][ T4763] dccp_xmit_packet+0x298/0x460 [ 78.100718][ T4763] dccp_write_xmit+0x118/0x1d0 [ 78.101483][ T4763] dccp_sendmsg+0x510/0x850 [ 78.102306][ T4763] inet_sendmsg+0x154/0x27c [ 78.102999][ T4763] __sys_sendto+0x30c/0x420 [ 78.103858][ T4763] __arm64_sys_sendto+0xe4/0x104 [ 78.104767][ T4763] invoke_syscall+0x98/0x28c [ 78.105618][ T4763] el0_svc_common+0x13c/0x258 [ 78.106567][ T4763] do_el0_svc+0x5c/0x140 [ 78.107311][ T4763] el0_svc+0x78/0x1d0 [ 78.107986][ T4763] el0t_64_sync_handler+0xcc/0xe4 [ 78.108825][ T4763] el0t_64_sync+0x1a0/0x1a4 [ 78.109779][ T4763] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.111412][ T4763] CPU: 1 PID: 4763 Comm: syz.0.51 Not tainted syzkaller #0 [ 78.112503][ T4763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.113957][ T4763] Call trace: [ 78.114486][ T4763] dump_backtrace+0x0/0x458 [ 78.115191][ T4763] show_stack+0x2c/0x3c [ 78.115780][ T4763] __dump_stack+0x30/0x40 [ 78.116446][ T4763] dump_stack_lvl+0xf4/0x15c [ 78.117141][ T4763] dump_stack+0x1c/0x5c [ 78.117742][ T4763] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.118592][ T4763] dccp_xmit_packet+0x298/0x460 [ 78.119360][ T4763] dccp_write_xmit+0x118/0x1d0 [ 78.120095][ T4763] dccp_sendmsg+0x510/0x850 [ 78.120811][ T4763] inet_sendmsg+0x154/0x27c [ 78.121604][ T4763] __sys_sendto+0x30c/0x420 [ 78.122332][ T4763] __arm64_sys_sendto+0xe4/0x104 [ 78.123146][ T4763] invoke_syscall+0x98/0x28c [ 78.123934][ T4763] el0_svc_common+0x13c/0x258 [ 78.124799][ T4763] do_el0_svc+0x5c/0x140 [ 78.125576][ T4763] el0_svc+0x78/0x1d0 [ 78.126176][ T4763] el0t_64_sync_handler+0xcc/0xe4 [ 78.126978][ T4763] el0t_64_sync+0x1a0/0x1a4 [ 78.127878][ T4763] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.129721][ T4763] CPU: 1 PID: 4763 Comm: syz.0.51 Not tainted syzkaller #0 [ 78.130861][ T4763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.132412][ T4763] Call trace: [ 78.132934][ T4763] dump_backtrace+0x0/0x458 [ 78.133614][ T4763] show_stack+0x2c/0x3c [ 78.134302][ T4763] __dump_stack+0x30/0x40 [ 78.134942][ T4763] dump_stack_lvl+0xf4/0x15c [ 78.135665][ T4763] dump_stack+0x1c/0x5c [ 78.136325][ T4763] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.137151][ T4763] dccp_xmit_packet+0x298/0x460 [ 78.137894][ T4763] dccp_write_xmit+0x118/0x1d0 [ 78.138630][ T4763] dccp_sendmsg+0x510/0x850 [ 78.139274][ T4763] inet_sendmsg+0x154/0x27c [ 78.139997][ T4763] __sys_sendto+0x30c/0x420 [ 78.140823][ T4763] __arm64_sys_sendto+0xe4/0x104 [ 78.141661][ T4763] invoke_syscall+0x98/0x28c [ 78.142395][ T4763] el0_svc_common+0x13c/0x258 [ 78.143152][ T4763] do_el0_svc+0x5c/0x140 [ 78.143849][ T4763] el0_svc+0x78/0x1d0 [ 78.144528][ T4763] el0t_64_sync_handler+0xcc/0xe4 [ 78.145346][ T4763] el0t_64_sync+0x1a0/0x1a4 [ 78.146310][ T4763] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.148111][ T4763] CPU: 1 PID: 4763 Comm: syz.0.51 Not tainted syzkaller #0 [ 78.149089][ T4763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.150636][ T4763] Call trace: [ 78.151150][ T4763] dump_backtrace+0x0/0x458 [ 78.151892][ T4763] show_stack+0x2c/0x3c [ 78.152563][ T4763] __dump_stack+0x30/0x40 [ 78.153300][ T4763] dump_stack_lvl+0xf4/0x15c [ 78.154067][ T4763] dump_stack+0x1c/0x5c [ 78.154712][ T4763] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.155587][ T4763] dccp_xmit_packet+0x298/0x460 [ 78.156360][ T4763] dccp_write_xmit+0x118/0x1d0 [ 78.157114][ T4763] dccp_sendmsg+0x510/0x850 [ 78.157819][ T4763] inet_sendmsg+0x154/0x27c [ 78.158493][ T4763] __sys_sendto+0x30c/0x420 [ 78.159209][ T4763] __arm64_sys_sendto+0xe4/0x104 [ 78.159956][ T4763] invoke_syscall+0x98/0x28c [ 78.160633][ T4763] el0_svc_common+0x13c/0x258 [ 78.161326][ T4763] do_el0_svc+0x5c/0x140 [ 78.162001][ T4763] el0_svc+0x78/0x1d0 [ 78.162618][ T4763] el0t_64_sync_handler+0xcc/0xe4 [ 78.163426][ T4763] el0t_64_sync+0x1a0/0x1a4 [ 78.164362][ T4763] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.166017][ T4763] CPU: 1 PID: 4763 Comm: syz.0.51 Not tainted syzkaller #0 [ 78.167141][ T4763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.168645][ T4763] Call trace: [ 78.169192][ T4763] dump_backtrace+0x0/0x458 [ 78.169932][ T4763] show_stack+0x2c/0x3c [ 78.170629][ T4763] __dump_stack+0x30/0x40 [ 78.171319][ T4763] dump_stack_lvl+0xf4/0x15c [ 78.172066][ T4763] dump_stack+0x1c/0x5c [ 78.172711][ T4763] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.173562][ T4763] dccp_xmit_packet+0x298/0x460 [ 78.174376][ T4763] dccp_write_xmit+0x118/0x1d0 [ 78.175191][ T4763] dccp_sendmsg+0x510/0x850 [ 78.175908][ T4763] inet_sendmsg+0x154/0x27c [ 78.176602][ T4763] __sys_sendto+0x30c/0x420 [ 78.177298][ T4763] __arm64_sys_sendto+0xe4/0x104 [ 78.178093][ T4763] invoke_syscall+0x98/0x28c [ 78.178851][ T4763] el0_svc_common+0x13c/0x258 [ 78.179605][ T4763] do_el0_svc+0x5c/0x140 [ 78.180297][ T4763] el0_svc+0x78/0x1d0 [ 78.180914][ T4763] el0t_64_sync_handler+0xcc/0xe4 [ 78.181636][ T4763] el0t_64_sync+0x1a0/0x1a4 [ 78.182483][ T4763] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.183927][ T4763] CPU: 1 PID: 4763 Comm: syz.0.51 Not tainted syzkaller #0 [ 78.185026][ T4763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.186534][ T4763] Call trace: [ 78.186977][ T4763] dump_backtrace+0x0/0x458 [ 78.187711][ T4763] show_stack+0x2c/0x3c [ 78.188408][ T4763] __dump_stack+0x30/0x40 [ 78.189073][ T4763] dump_stack_lvl+0xf4/0x15c [ 78.189754][ T4763] dump_stack+0x1c/0x5c [ 78.190413][ T4763] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.191325][ T4763] dccp_xmit_packet+0x298/0x460 [ 78.192170][ T4763] dccp_write_xmit+0x118/0x1d0 [ 78.192917][ T4763] dccp_sendmsg+0x510/0x850 [ 78.193647][ T4763] inet_sendmsg+0x154/0x27c [ 78.194324][ T4763] __sys_sendto+0x30c/0x420 [ 78.195080][ T4763] __arm64_sys_sendto+0xe4/0x104 [ 78.195878][ T4763] invoke_syscall+0x98/0x28c [ 78.196619][ T4763] el0_svc_common+0x13c/0x258 [ 78.197401][ T4763] do_el0_svc+0x5c/0x140 [ 78.198039][ T4763] el0_svc+0x78/0x1d0 [ 78.198743][ T4763] el0t_64_sync_handler+0xcc/0xe4 [ 78.199570][ T4763] el0t_64_sync+0x1a0/0x1a4 [ 78.200457][ T4763] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.202114][ T4763] CPU: 1 PID: 4763 Comm: syz.0.51 Not tainted syzkaller #0 [ 78.203193][ T4763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.204633][ T4763] Call trace: [ 78.205103][ T4763] dump_backtrace+0x0/0x458 [ 78.205762][ T4763] show_stack+0x2c/0x3c [ 78.206463][ T4763] __dump_stack+0x30/0x40 [ 78.207095][ T4763] dump_stack_lvl+0xf4/0x15c [ 78.207822][ T4763] dump_stack+0x1c/0x5c [ 78.208468][ T4763] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.209324][ T4763] dccp_xmit_packet+0x298/0x460 [ 78.210118][ T4763] dccp_write_xmit+0x118/0x1d0 [ 78.210848][ T4763] dccp_sendmsg+0x510/0x850 [ 78.211514][ T4763] inet_sendmsg+0x154/0x27c [ 78.212240][ T4763] __sys_sendto+0x30c/0x420 [ 78.212910][ T4763] __arm64_sys_sendto+0xe4/0x104 [ 78.213691][ T4763] invoke_syscall+0x98/0x28c [ 78.214526][ T4763] el0_svc_common+0x13c/0x258 [ 78.215311][ T4763] do_el0_svc+0x5c/0x140 [ 78.215986][ T4763] el0_svc+0x78/0x1d0 [ 78.216715][ T4763] el0t_64_sync_handler+0xcc/0xe4 [ 78.217599][ T4763] el0t_64_sync+0x1a0/0x1a4 [ 78.234963][ T4765] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.236854][ T4765] CPU: 1 PID: 4765 Comm: syz.0.52 Not tainted syzkaller #0 [ 78.238033][ T4765] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.239636][ T4765] Call trace: [ 78.240117][ T4765] dump_backtrace+0x0/0x458 [ 78.240791][ T4765] show_stack+0x2c/0x3c [ 78.241408][ T4765] __dump_stack+0x30/0x40 [ 78.242075][ T4765] dump_stack_lvl+0xf4/0x15c [ 78.242779][ T4765] dump_stack+0x1c/0x5c [ 78.243440][ T4765] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.244268][ T4765] dccp_xmit_packet+0x298/0x460 [ 78.245010][ T4765] dccp_write_xmit+0x118/0x1d0 [ 78.245784][ T4765] dccp_sendmsg+0x510/0x850 [ 78.246481][ T4765] inet_sendmsg+0x154/0x27c [ 78.247224][ T4765] __sys_sendto+0x30c/0x420 [ 78.247933][ T4765] __arm64_sys_sendto+0xe4/0x104 [ 78.248715][ T4765] invoke_syscall+0x98/0x28c [ 78.249413][ T4765] el0_svc_common+0x13c/0x258 [ 78.250141][ T4765] do_el0_svc+0x5c/0x140 [ 78.250764][ T4765] el0_svc+0x78/0x1d0 [ 78.251376][ T4765] el0t_64_sync_handler+0xcc/0xe4 [ 78.252129][ T4765] el0t_64_sync+0x1a0/0x1a4 [ 78.253442][ T4765] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.255169][ T4765] CPU: 1 PID: 4765 Comm: syz.0.52 Not tainted syzkaller #0 [ 78.256248][ T4765] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.257745][ T4765] Call trace: [ 78.258225][ T4765] dump_backtrace+0x0/0x458 [ 78.258993][ T4765] show_stack+0x2c/0x3c [ 78.259652][ T4765] __dump_stack+0x30/0x40 [ 78.260331][ T4765] dump_stack_lvl+0xf4/0x15c [ 78.261034][ T4765] dump_stack+0x1c/0x5c [ 78.261637][ T4765] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.262566][ T4765] dccp_xmit_packet+0x298/0x460 [ 78.263342][ T4765] dccp_write_xmit+0x118/0x1d0 [ 78.264086][ T4765] dccp_sendmsg+0x510/0x850 [ 78.264813][ T4765] inet_sendmsg+0x154/0x27c [ 78.265560][ T4765] __sys_sendto+0x30c/0x420 [ 78.266268][ T4765] __arm64_sys_sendto+0xe4/0x104 [ 78.267134][ T4765] invoke_syscall+0x98/0x28c [ 78.267811][ T4765] el0_svc_common+0x13c/0x258 [ 78.268569][ T4765] do_el0_svc+0x5c/0x140 [ 78.269305][ T4765] el0_svc+0x78/0x1d0 [ 78.270022][ T4765] el0t_64_sync_handler+0xcc/0xe4 [ 78.270788][ T4765] el0t_64_sync+0x1a0/0x1a4 [ 78.272130][ T4765] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.273873][ T4765] CPU: 1 PID: 4765 Comm: syz.0.52 Not tainted syzkaller #0 [ 78.274946][ T4765] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.276348][ T4765] Call trace: [ 78.276818][ T4765] dump_backtrace+0x0/0x458 [ 78.277466][ T4765] show_stack+0x2c/0x3c [ 78.278039][ T4765] __dump_stack+0x30/0x40 [ 78.278720][ T4765] dump_stack_lvl+0xf4/0x15c [ 78.279406][ T4765] dump_stack+0x1c/0x5c [ 78.280084][ T4765] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.281017][ T4765] dccp_xmit_packet+0x298/0x460 [ 78.281796][ T4765] dccp_write_xmit+0x118/0x1d0 [ 78.282515][ T4765] dccp_sendmsg+0x510/0x850 [ 78.283232][ T4765] inet_sendmsg+0x154/0x27c [ 78.283911][ T4765] __sys_sendto+0x30c/0x420 [ 78.284564][ T4765] __arm64_sys_sendto+0xe4/0x104 [ 78.285369][ T4765] invoke_syscall+0x98/0x28c [ 78.286026][ T4765] el0_svc_common+0x13c/0x258 [ 78.286811][ T4765] do_el0_svc+0x5c/0x140 [ 78.287461][ T4765] el0_svc+0x78/0x1d0 [ 78.288085][ T4765] el0t_64_sync_handler+0xcc/0xe4 [ 78.288873][ T4765] el0t_64_sync+0x1a0/0x1a4 [ 78.289849][ T4765] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.291525][ T4765] CPU: 1 PID: 4765 Comm: syz.0.52 Not tainted syzkaller #0 [ 78.292669][ T4765] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.294154][ T4765] Call trace: [ 78.294629][ T4765] dump_backtrace+0x0/0x458 [ 78.295307][ T4765] show_stack+0x2c/0x3c [ 78.295997][ T4765] __dump_stack+0x30/0x40 [ 78.296621][ T4765] dump_stack_lvl+0xf4/0x15c [ 78.297302][ T4765] dump_stack+0x1c/0x5c [ 78.297921][ T4765] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.298797][ T4765] dccp_xmit_packet+0x298/0x460 [ 78.299564][ T4765] dccp_write_xmit+0x118/0x1d0 [ 78.300316][ T4765] dccp_sendmsg+0x510/0x850 [ 78.301046][ T4765] inet_sendmsg+0x154/0x27c [ 78.301775][ T4765] __sys_sendto+0x30c/0x420 [ 78.302516][ T4765] __arm64_sys_sendto+0xe4/0x104 [ 78.303294][ T4765] invoke_syscall+0x98/0x28c [ 78.304023][ T4765] el0_svc_common+0x13c/0x258 [ 78.304748][ T4765] do_el0_svc+0x5c/0x140 [ 78.305440][ T4765] el0_svc+0x78/0x1d0 [ 78.306033][ T4765] el0t_64_sync_handler+0xcc/0xe4 [ 78.306818][ T4765] el0t_64_sync+0x1a0/0x1a4 [ 78.307778][ T4765] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.309566][ T4765] CPU: 1 PID: 4765 Comm: syz.0.52 Not tainted syzkaller #0 [ 78.310675][ T4765] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.312117][ T4765] Call trace: [ 78.312551][ T4765] dump_backtrace+0x0/0x458 [ 78.313181][ T4765] show_stack+0x2c/0x3c [ 78.313738][ T4765] __dump_stack+0x30/0x40 [ 78.314309][ T4765] dump_stack_lvl+0xf4/0x15c [ 78.315011][ T4765] dump_stack+0x1c/0x5c [ 78.315617][ T4765] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.316459][ T4765] dccp_xmit_packet+0x298/0x460 [ 78.317161][ T4765] dccp_write_xmit+0x118/0x1d0 [ 78.317885][ T4765] dccp_sendmsg+0x510/0x850 [ 78.318569][ T4765] inet_sendmsg+0x154/0x27c [ 78.319323][ T4765] __sys_sendto+0x30c/0x420 [ 78.320040][ T4765] __arm64_sys_sendto+0xe4/0x104 [ 78.320812][ T4765] invoke_syscall+0x98/0x28c [ 78.321540][ T4765] el0_svc_common+0x13c/0x258 [ 78.322236][ T4765] do_el0_svc+0x5c/0x140 [ 78.322890][ T4765] el0_svc+0x78/0x1d0 [ 78.323494][ T4765] el0t_64_sync_handler+0xcc/0xe4 [ 78.324289][ T4765] el0t_64_sync+0x1a0/0x1a4 [ 78.325150][ T4765] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.326881][ T4765] CPU: 1 PID: 4765 Comm: syz.0.52 Not tainted syzkaller #0 [ 78.327991][ T4765] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.329558][ T4765] Call trace: [ 78.330072][ T4765] dump_backtrace+0x0/0x458 [ 78.330769][ T4765] show_stack+0x2c/0x3c [ 78.331403][ T4765] __dump_stack+0x30/0x40 [ 78.332111][ T4765] dump_stack_lvl+0xf4/0x15c [ 78.332855][ T4765] dump_stack+0x1c/0x5c [ 78.333517][ T4765] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.334420][ T4765] dccp_xmit_packet+0x298/0x460 [ 78.335163][ T4765] dccp_write_xmit+0x118/0x1d0 [ 78.335926][ T4765] dccp_sendmsg+0x510/0x850 [ 78.336603][ T4765] inet_sendmsg+0x154/0x27c [ 78.337337][ T4765] __sys_sendto+0x30c/0x420 [ 78.338034][ T4765] __arm64_sys_sendto+0xe4/0x104 [ 78.338863][ T4765] invoke_syscall+0x98/0x28c [ 78.339612][ T4765] el0_svc_common+0x13c/0x258 [ 78.340398][ T4765] do_el0_svc+0x5c/0x140 [ 78.341080][ T4765] el0_svc+0x78/0x1d0 [ 78.341743][ T4765] el0t_64_sync_handler+0xcc/0xe4 [ 78.342577][ T4765] el0t_64_sync+0x1a0/0x1a4 [ 78.343451][ T4765] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.345178][ T4765] CPU: 1 PID: 4765 Comm: syz.0.52 Not tainted syzkaller #0 [ 78.346296][ T4765] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.347769][ T4765] Call trace: [ 78.348240][ T4765] dump_backtrace+0x0/0x458 [ 78.349030][ T4765] show_stack+0x2c/0x3c [ 78.349704][ T4765] __dump_stack+0x30/0x40 [ 78.350390][ T4765] dump_stack_lvl+0xf4/0x15c [ 78.351127][ T4765] dump_stack+0x1c/0x5c [ 78.351803][ T4765] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.352572][ T4765] dccp_xmit_packet+0x298/0x460 [ 78.353348][ T4765] dccp_write_xmit+0x118/0x1d0 [ 78.354121][ T4765] dccp_sendmsg+0x510/0x850 [ 78.354847][ T4765] inet_sendmsg+0x154/0x27c [ 78.355521][ T4765] __sys_sendto+0x30c/0x420 [ 78.356272][ T4765] __arm64_sys_sendto+0xe4/0x104 [ 78.357105][ T4765] invoke_syscall+0x98/0x28c [ 78.357799][ T4765] el0_svc_common+0x13c/0x258 [ 78.358529][ T4765] do_el0_svc+0x5c/0x140 [ 78.359207][ T4765] el0_svc+0x78/0x1d0 [ 78.359845][ T4765] el0t_64_sync_handler+0xcc/0xe4 [ 78.360617][ T4765] el0t_64_sync+0x1a0/0x1a4 [ 78.361777][ T4765] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.363453][ T4765] CPU: 1 PID: 4765 Comm: syz.0.52 Not tainted syzkaller #0 [ 78.364509][ T4765] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.365950][ T4765] Call trace: [ 78.366446][ T4765] dump_backtrace+0x0/0x458 [ 78.367087][ T4765] show_stack+0x2c/0x3c [ 78.367704][ T4765] __dump_stack+0x30/0x40 [ 78.368381][ T4765] dump_stack_lvl+0xf4/0x15c [ 78.369130][ T4765] dump_stack+0x1c/0x5c [ 78.369817][ T4765] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.370712][ T4765] dccp_xmit_packet+0x298/0x460 [ 78.371572][ T4765] dccp_write_xmit+0x118/0x1d0 [ 78.372391][ T4765] dccp_sendmsg+0x510/0x850 [ 78.373100][ T4765] inet_sendmsg+0x154/0x27c [ 78.373822][ T4765] __sys_sendto+0x30c/0x420 [ 78.374511][ T4765] __arm64_sys_sendto+0xe4/0x104 [ 78.375309][ T4765] invoke_syscall+0x98/0x28c [ 78.376051][ T4765] el0_svc_common+0x13c/0x258 [ 78.376733][ T4765] do_el0_svc+0x5c/0x140 [ 78.377324][ T4765] el0_svc+0x78/0x1d0 [ 78.377999][ T4765] el0t_64_sync_handler+0xcc/0xe4 [ 78.378772][ T4765] el0t_64_sync+0x1a0/0x1a4 [ 78.379662][ T4765] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.381375][ T4765] CPU: 1 PID: 4765 Comm: syz.0.52 Not tainted syzkaller #0 [ 78.382452][ T4765] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.383994][ T4765] Call trace: [ 78.384481][ T4765] dump_backtrace+0x0/0x458 [ 78.385164][ T4765] show_stack+0x2c/0x3c [ 78.385745][ T4765] __dump_stack+0x30/0x40 [ 78.386358][ T4765] dump_stack_lvl+0xf4/0x15c [ 78.386971][ T4765] dump_stack+0x1c/0x5c [ 78.387537][ T4765] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.388309][ T4765] dccp_xmit_packet+0x298/0x460 [ 78.389075][ T4765] dccp_write_xmit+0x118/0x1d0 [ 78.389855][ T4765] dccp_sendmsg+0x510/0x850 [ 78.390606][ T4765] inet_sendmsg+0x154/0x27c [ 78.391358][ T4765] __sys_sendto+0x30c/0x420 [ 78.392100][ T4765] __arm64_sys_sendto+0xe4/0x104 [ 78.392901][ T4765] invoke_syscall+0x98/0x28c [ 78.393667][ T4765] el0_svc_common+0x13c/0x258 [ 78.394450][ T4765] do_el0_svc+0x5c/0x140 [ 78.395106][ T4765] el0_svc+0x78/0x1d0 [ 78.395728][ T4765] el0t_64_sync_handler+0xcc/0xe4 [ 78.396550][ T4765] el0t_64_sync+0x1a0/0x1a4 [ 78.397451][ T4765] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.399159][ T4765] CPU: 1 PID: 4765 Comm: syz.0.52 Not tainted syzkaller #0 [ 78.400204][ T4765] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.401621][ T4765] Call trace: [ 78.402099][ T4765] dump_backtrace+0x0/0x458 [ 78.402699][ T4765] show_stack+0x2c/0x3c [ 78.403400][ T4765] __dump_stack+0x30/0x40 [ 78.403962][ T4765] dump_stack_lvl+0xf4/0x15c [ 78.404563][ T4765] dump_stack+0x1c/0x5c [ 78.405169][ T4765] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.406058][ T4765] dccp_xmit_packet+0x298/0x460 [ 78.406828][ T4765] dccp_write_xmit+0x118/0x1d0 [ 78.407520][ T4765] dccp_sendmsg+0x510/0x850 [ 78.408247][ T4765] inet_sendmsg+0x154/0x27c [ 78.408936][ T4765] __sys_sendto+0x30c/0x420 [ 78.409628][ T4765] __arm64_sys_sendto+0xe4/0x104 [ 78.410461][ T4765] invoke_syscall+0x98/0x28c [ 78.411264][ T4765] el0_svc_common+0x13c/0x258 [ 78.412072][ T4765] do_el0_svc+0x5c/0x140 [ 78.412818][ T4765] el0_svc+0x78/0x1d0 [ 78.413527][ T4765] el0t_64_sync_handler+0xcc/0xe4 [ 78.414279][ T4765] el0t_64_sync+0x1a0/0x1a4 [ 78.415171][ T4765] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.416849][ T4765] CPU: 1 PID: 4765 Comm: syz.0.52 Not tainted syzkaller #0 [ 78.417858][ T4765] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.419464][ T4765] Call trace: [ 78.419973][ T4765] dump_backtrace+0x0/0x458 [ 78.420621][ T4765] show_stack+0x2c/0x3c [ 78.421248][ T4765] __dump_stack+0x30/0x40 [ 78.421892][ T4765] dump_stack_lvl+0xf4/0x15c [ 78.422532][ T4765] dump_stack+0x1c/0x5c [ 78.423166][ T4765] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.423992][ T4765] dccp_xmit_packet+0x298/0x460 [ 78.424833][ T4765] dccp_write_xmit+0x118/0x1d0 [ 78.425596][ T4765] dccp_sendmsg+0x510/0x850 [ 78.426287][ T4765] inet_sendmsg+0x154/0x27c [ 78.427023][ T4765] __sys_sendto+0x30c/0x420 [ 78.427730][ T4765] __arm64_sys_sendto+0xe4/0x104 [ 78.428468][ T4765] invoke_syscall+0x98/0x28c [ 78.429262][ T4765] el0_svc_common+0x13c/0x258 [ 78.430058][ T4765] do_el0_svc+0x5c/0x140 [ 78.430782][ T4765] el0_svc+0x78/0x1d0 [ 78.431454][ T4765] el0t_64_sync_handler+0xcc/0xe4 [ 78.432241][ T4765] el0t_64_sync+0x1a0/0x1a4 [ 78.433103][ T4765] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.434764][ T4765] CPU: 1 PID: 4765 Comm: syz.0.52 Not tainted syzkaller #0 [ 78.435767][ T4765] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.437234][ T4765] Call trace: [ 78.437715][ T4765] dump_backtrace+0x0/0x458 [ 78.438400][ T4765] show_stack+0x2c/0x3c [ 78.439016][ T4765] __dump_stack+0x30/0x40 [ 78.439694][ T4765] dump_stack_lvl+0xf4/0x15c [ 78.440384][ T4765] dump_stack+0x1c/0x5c [ 78.440990][ T4765] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.441847][ T4765] dccp_xmit_packet+0x298/0x460 [ 78.442675][ T4765] dccp_write_xmit+0x118/0x1d0 [ 78.443429][ T4765] dccp_sendmsg+0x510/0x850 [ 78.444165][ T4765] inet_sendmsg+0x154/0x27c [ 78.444838][ T4765] __sys_sendto+0x30c/0x420 [ 78.445491][ T4765] __arm64_sys_sendto+0xe4/0x104 [ 78.446211][ T4765] invoke_syscall+0x98/0x28c [ 78.446885][ T4765] el0_svc_common+0x13c/0x258 [ 78.447610][ T4765] do_el0_svc+0x5c/0x140 [ 78.448304][ T4765] el0_svc+0x78/0x1d0 [ 78.448890][ T4765] el0t_64_sync_handler+0xcc/0xe4 [ 78.449674][ T4765] el0t_64_sync+0x1a0/0x1a4 [ 78.450536][ T4765] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.452205][ T4765] CPU: 1 PID: 4765 Comm: syz.0.52 Not tainted syzkaller #0 [ 78.453220][ T4765] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.454723][ T4765] Call trace: [ 78.455243][ T4765] dump_backtrace+0x0/0x458 [ 78.455909][ T4765] show_stack+0x2c/0x3c [ 78.456488][ T4765] __dump_stack+0x30/0x40 [ 78.457149][ T4765] dump_stack_lvl+0xf4/0x15c [ 78.457867][ T4765] dump_stack+0x1c/0x5c [ 78.458543][ T4765] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.459491][ T4765] dccp_xmit_packet+0x298/0x460 [ 78.460274][ T4765] dccp_write_xmit+0x118/0x1d0 [ 78.461079][ T4765] dccp_sendmsg+0x510/0x850 [ 78.461798][ T4765] inet_sendmsg+0x154/0x27c [ 78.462473][ T4765] __sys_sendto+0x30c/0x420 [ 78.463175][ T4765] __arm64_sys_sendto+0xe4/0x104 [ 78.464023][ T4765] invoke_syscall+0x98/0x28c [ 78.464743][ T4765] el0_svc_common+0x13c/0x258 [ 78.465517][ T4765] do_el0_svc+0x5c/0x140 [ 78.466198][ T4765] el0_svc+0x78/0x1d0 [ 78.466838][ T4765] el0t_64_sync_handler+0xcc/0xe4 [ 78.467601][ T4765] el0t_64_sync+0x1a0/0x1a4 [ 78.469307][ T4765] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.470934][ T4765] CPU: 1 PID: 4765 Comm: syz.0.52 Not tainted syzkaller #0 [ 78.472028][ T4765] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.473552][ T4765] Call trace: [ 78.474026][ T4765] dump_backtrace+0x0/0x458 [ 78.474666][ T4765] show_stack+0x2c/0x3c [ 78.475254][ T4765] __dump_stack+0x30/0x40 [ 78.475862][ T4765] dump_stack_lvl+0xf4/0x15c [ 78.476544][ T4765] dump_stack+0x1c/0x5c [ 78.477159][ T4765] ccid3_hc_tx_packet_sent+0x240/0x2c4 [ 78.477924][ T4765] dccp_xmit_packet+0x298/0x460 [ 78.478683][ T4765] dccp_write_xmit+0x118/0x1d0 [ 78.479452][ T4765] dccp_sendmsg+0x510/0x850 [ 78.480172][ T4765] inet_sendmsg+0x154/0x27c [ 78.480853][ T4765] __sys_sendto+0x30c/0x420 [ 78.481549][ T4765] __arm64_sys_sendto+0xe4/0x104 [ 78.482393][ T4765] invoke_syscall+0x98/0x28c [ 78.483137][ T4765] el0_svc_common+0x13c/0x258 [ 78.483909][ T4765] do_el0_svc+0x5c/0x140 [ 78.484598][ T4765] el0_svc+0x78/0x1d0 [ 78.485172][ T4765] el0t_64_sync_handler+0xcc/0xe4 [ 78.485893][ T4765] el0t_64_sync+0x1a0/0x1a4 [ 78.486696][ T4765] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 78.488505][ T4765] CPU: 1 PID: 4765 Comm: syz.0.52 Not tainted syzkaller #0 [ 78.489581][ T4765] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 78.491053][ T4765] Call trace: [ 78.491505][ T4765] dump_backtrace+0x0/0x458 [ 78.492152][ T4765] show_stack+0x2c/0x3c [ 78.492776][ T4765] __dump_stack+0x30/0x40 [ 78.493399][ T4765] dump_stack_lvl+0xf4/0x15c [ 78.494118][ T4765] dump_stack+0x1c/0x5c [ 78.494743][ T4765] ccid3_hc_tx_packet_sent+0x240/0x2c4