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vmm: config: Reject reserved fd from network config

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Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2021-04-13 11:15:03 +01:00 committed by Sebastien Boeuf
parent e0c0d0e142
commit 86e4067437
1 changed files with 19 additions and 0 deletions
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19
vmm/src/config.rs
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@ -117,6 +117,8 @@ pub enum ValidationError {
VnetQueueLowerThan2,
/// The input queue number for virtio_net must match the number of input fds
VnetQueueFdMismatch,
/// Using reserved fd
VnetReservedFd,
// Hugepages not turned on
HugePageSizeWithoutHugePages,
// Huge page size is not power of 2
@ -153,6 +155,7 @@ impl fmt::Display for ValidationError {
f,
"Number of queues to virtio_net does not match the number of input FDs"
),
VnetReservedFd => write!(f, "Reserved fd number (<= 2)"),
HugePageSizeWithoutHugePages => {
write!(f, "Huge page size specified but huge pages not enabled")
}
@ -1075,6 +1078,7 @@ impl NetConfig {
config.validate().map_err(Error::Validation)?;
Ok(config)
}
pub fn validate(&self) -> ValidationResult<()> {
if self.num_queues < 2 {
return Err(ValidationError::VnetQueueLowerThan2);
@ -1084,6 +1088,14 @@ impl NetConfig {
return Err(ValidationError::VnetQueueFdMismatch);
}
if let Some(fds) = self.fds.as_ref() {
for fd in fds {
if *fd <= 2 {
return Err(ValidationError::VnetReservedFd);
}
}
}
Ok(())
}
}
@ -2595,6 +2607,13 @@ mod tests {
still_valid_config.memory.shared = true;
assert!(still_valid_config.validate().is_ok());
let mut invalid_config = valid_config.clone();
invalid_config.net = Some(vec![NetConfig {
fds: Some(vec![0]),
..Default::default()
}]);
assert!(invalid_config.validate().is_err());
let mut invalid_config = valid_config.clone();
invalid_config.fs = Some(vec![FsConfig {
..Default::default()