{"record":{"id":"10388a1c47a9c93e","repo":"astrid-runtime/astrid","slug":"invalid-fuse-service-parent-token","errorCode":null,"errorMessage":"invalid FUSE service parent token","messagePattern":"invalid FUSE service parent token","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/astrid-storage-provider-fuse/src/service.rs","lineNumber":190,"sourceCode":"fn validate_launch(launch: &StorageProviderServiceLaunchV1) -> Result<()> {\n    validate_parent(&launch.parent)?;\n    validate_lease(&launch.lease)?;\n    validate_mountpoint(&launch.mountpoint, &launch.lease.resource_path)?;\n    validate_control_path(&launch.control_path, &launch.lease.resource_path)?;\n    Ok(())\n}\n\nfn validate_parent(\n    parent: &astrid_core::storage_filesystem::StorageProviderParentLifetimeV1,\n) -> Result<()> {\n    if parent.pid <= 1 || parent.pid == std::process::id() {\n        bail!(\"invalid FUSE service parent PID\");\n    }\n    if parent.token.len() < 16\n        || parent.token.len() > 512\n        || parent.token.chars().any(char::is_control)\n    {\n        bail!(\"invalid FUSE service parent token\");\n    }\n    if let Some(identity) = parent.start_identity.as_deref()\n        && (identity.is_empty() || identity.len() > 512 || identity.chars().any(char::is_control))\n    {\n        bail!(\"invalid FUSE service parent start identity\");\n    }\n    #[cfg(target_os = \"linux\")]\n    if parent.start_identity.is_none() {\n        bail!(\"FUSE service parent start identity is required on Linux\");\n    }\n    Ok(())\n}\n\nfn validate_lease(lease: &StorageMountLeaseV1) -> Result<()> {\n    if lease.lease_token.len() < 16\n        || lease.lease_token.len() > 4096\n        || lease.lease_token.chars().any(char::is_control)\n    {","sourceCodeStart":172,"sourceCodeEnd":208,"githubUrl":"https://github.com/astrid-runtime/astrid/blob/affd8760f44190dbdfbec23403f4c4b642c33112/crates/astrid-storage-provider-fuse/src/service.rs#L172-L208","documentation":"The parent's authentication token must be 16–512 bytes long and contain no control characters; it is used by the helper to authenticate Status/Stop control requests. A token that is missing, too short, too long, or contains control characters is rejected before the service starts.","triggerScenarios":"`validate_parent` finds `parent.token.len() < 16 || > 512 || contains control chars` when `validate_launch` checks the launch descriptor.","commonSituations":"Caller generated an empty or too-short token; a token was read from a file/env with a trailing newline or other control bytes; truncated token from config; placeholder token left in test config.","solutions":["Generate a token with a CSPRNG of at least 16 bytes (e.g. 32 random bytes hex/base64).","Trim and sanitize the token so it contains no control characters (strip \\n, \\r, \\0).","Verify the token is passed intact to the child process (env/args, not truncated).","Validate token length client-side before building the launch descriptor."],"exampleFix":"// before\nlet token = \"abc\"; // too short\n// after\nuse rand::RngCore;\nlet mut buf = [0u8; 32];\nrand::thread_rng().fill_bytes(&mut buf);\nlet token = hex::encode(buf); // 64 chars, no control chars","handlingStrategy":"validation","validationCode":"fn valid_token(token: &str) -> bool {\n    (16..=512).contains(&token.len()) && !token.chars().any(char::is_control)\n}","typeGuard":"fn has_valid_token(parent: &StorageProviderParentLifetimeV1) -> bool {\n    (16..=512).contains(&parent.token.len()) && !parent.token.chars().any(char::is_control)\n}","tryCatchPattern":null,"preventionTips":["Generate tokens with a CSPRNG, 32+ bytes","Trim tokens read from env/files to strip control chars","Never use placeholder or hardcoded test tokens in production"],"tags":["fuse","validation","security","token"],"backgroundTag":"invalid-argument-value","analyzedSha":"affd8760f44190dbdfbec23403f4c4b642c33112","analyzedAt":"2026-09-09T21:28:12.402Z","contentChangedAt":"2026-09-09T21:28:12.402Z","schemaVersion":2},"datasetVersion":"2026-09-14T11:17:12.474Z"}