------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:4285! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 10873 Comm: syz.5.2000 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : skb_segment+0x3560/0x35e4 net/core/skbuff.c:4285 lr : skb_segment+0x3560/0x35e4 net/core/skbuff.c:4285 sp : ffff800022915900 x29: ffff800022915a80 x28: 00000000000005dc x27: ffff0000cabaa000 x26: 0000000000000000 x25: ffff0000d17686f8 x24: dfff800000000000 x23: 0000000000000584 x22: 0000000000000000 x21: ffff0000d1768000 x20: 0000000000000ac0 x19: ffff0000d17686c0 x18: 0000000000000000 x17: 00000000ffff0000 x16: ffff000000000000 x15: 0000000000000000 x14: 0000000000000001 x13: 1fffe0001a2ed0dc x12: 0000000000080000 x11: 000000000000f79a x10: ffff800023cca000 x9 : ffff80000fe9afc8 x8 : 000000000000f79b x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffff0000cabaa0c8 x4 : ffff0000c48a6488 x3 : ffff80000fe82294 x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000 dump_backtrace(regs = 0000000064be81a0 tsk = 0000000000000000) Call trace: skb_segment+0x3560/0x35e4 net/core/skbuff.c:4285 sctp_gso_segment+0x238/0x9d4 net/sctp/offload.c:71 ipv6_gso_segment+0x5a4/0x1518 net/ipv6/ip6_offload.c:140 sit_gso_segment+0xac/0xfc net/ipv6/ip6_offload.c:429 inet_gso_segment+0x4c0/0x1110 net/ipv4/af_inet.c:1430 skb_mac_gso_segment+0x2b8/0x5a0 net/core/gro.c:141 __skb_gso_segment+0x264/0x3f8 net/core/dev.c:3497 skb_gso_segment include/linux/netdevice.h:4842 [inline] ip_finish_output_gso net/ipv4/ip_output.c:267 [inline] __ip_finish_output+0x224/0x448 net/ipv4/ip_output.c:301 ip_finish_output+0x40/0x264 net/ipv4/ip_output.c:316 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip_output+0x3d4/0x5c8 net/ipv4/ip_output.c:434 dst_output include/net/dst.h:456 [inline] ip_local_out+0x120/0x15c net/ipv4/ip_output.c:126 iptunnel_xmit+0x3c4/0x860 net/ipv4/ip_tunnel_core.c:82 ipip6_tunnel_xmit net/ipv6/sit.c:1035 [inline] sit_tunnel_xmit+0x16c4/0x1e60 net/ipv6/sit.c:1077 __netdev_start_xmit include/linux/netdevice.h:4898 [inline] netdev_start_xmit include/linux/netdevice.h:4912 [inline] xmit_one net/core/dev.c:3706 [inline] dev_hard_start_xmit+0x234/0x8c8 net/core/dev.c:3722 __dev_queue_xmit+0x1640/0x3330 net/core/dev.c:4393 dev_queue_xmit include/linux/netdevice.h:3060 [inline] neigh_connected_output+0x378/0x408 net/core/neighbour.c:1597 neigh_output include/net/neighbour.h:549 [inline] ip6_finish_output2+0xdd8/0x1794 net/ipv6/ip6_output.c:135 __ip6_finish_output net/ipv6/ip6_output.c:201 [inline] ip6_finish_output+0x598/0x930 net/ipv6/ip6_output.c:212 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip6_output+0x2c0/0x62c net/ipv6/ip6_output.c:239 dst_output include/net/dst.h:456 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] ip6_xmit+0x11e4/0x1b74 net/ipv6/ip6_output.c:364 sctp_v6_xmit+0x7f4/0xf28 net/sctp/ipv6.c:251 sctp_packet_transmit+0x1e34/0x2360 net/sctp/output.c:653 sctp_outq_flush_transports net/sctp/outqueue.c:1174 [inline] sctp_outq_flush+0xcc4/0x2904 net/sctp/outqueue.c:1222 sctp_outq_uncork+0x84/0xc0 net/sctp/outqueue.c:765 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:-1 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1206 [inline] sctp_do_sm+0x4394/0x49d4 net/sctp/sm_sideeffect.c:1177 sctp_primitive_SEND+0x98/0xcc net/sctp/primitive.c:163 sctp_sendmsg_to_asoc+0x10d4/0x149c net/sctp/socket.c:1879 sctp_sendmsg+0x13bc/0x20f4 net/sctp/socket.c:2046 inet_sendmsg+0x154/0x27c net/ipv4/af_inet.c:841 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] sock_sendmsg net/socket.c:753 [inline] kernel_sendmsg+0x270/0x2f0 net/socket.c:777 sock_no_sendpage+0x150/0x1d0 net/core/sock.c:3291 kernel_sendpage+0x1e0/0x310 net/socket.c:3608 sock_sendpage+0x84/0xcc net/socket.c:1082 pipe_to_sendpage+0x1ec/0x2e8 fs/splice.c:360 splice_from_pipe_feed fs/splice.c:414 [inline] __splice_from_pipe+0x2d4/0x734 fs/splice.c:558 splice_from_pipe fs/splice.c:593 [inline] generic_splice_sendpage+0xf0/0x154 fs/splice.c:742 do_splice_from fs/splice.c:763 [inline] do_splice+0xc2c/0x150c fs/splice.c:1102 __do_splice fs/splice.c:1167 [inline] __do_sys_splice fs/splice.c:1374 [inline] __se_sys_splice fs/splice.c:1356 [inline] __arm64_sys_splice+0x4dc/0x5f4 fs/splice.c:1356 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x12c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:589 Code: 9101c100 962984a6 17fff3ff 96186d3c (d4210000) ---[ end trace 0000000000000000 ]---