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correctness

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This commit is contained in:
JackDoan
2026-04-27 11:37:58 -05:00
parent 8fdd98f639
commit d1ea33659a
2 changed files with 4 additions and 1 deletions
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2
overlay/tio/tio_gso_linux.go
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@@ -80,7 +80,7 @@ func newOffload(fd int, shutdownFd int) (*Offload, error) {
fd: fd,
shutdownFd: shutdownFd,
closed: atomic.Bool{},
readBuf: make([]byte, tunReadBufSize),
readBuf: make([]byte, virtioNetHdrLen+tunReadBufSize),
readPoll: [2]unix.PollFd{
{Fd: int32(fd), Events: unix.POLLIN},
{Fd: int32(shutdownFd), Events: unix.POLLIN},

3
overlay/tio/tun_linux_offload.go
View File

@@ -56,6 +56,9 @@ func checkVirtioValid(pkt []byte, hdr VirtioNetHdr) error {
if hdr.Flags&unix.VIRTIO_NET_HDR_F_RSC_INFO != 0 {
return fmt.Errorf("virtio RSC_INFO flag not supported on TUN reads")
}
if len(pkt) < ipv4HeaderMinLen {
return fmt.Errorf("packet too short")
}
ipVersion := pkt[0] >> 4
switch hdr.GSOType {
case unix.VIRTIO_NET_HDR_GSO_TCPV4: