{"record":{"id":"ad9d30012e2ddcad","repo":"openai/codex","slug":"tokenuser-size-query-returned-0","errorCode":null,"errorMessage":"TokenUser size query returned 0","messagePattern":"TokenUser size query returned 0","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"codex-rs/windows-sandbox-rs/src/token.rs","lineNumber":283,"sourceCode":"                std::ptr::read_unaligned(ln_buf.as_ptr() as *const TOKEN_LINKED_TOKEN);\n            if lt.linked_token != 0 {\n                let res = scan_token_groups_for_logon(lt.linked_token);\n                CloseHandle(lt.linked_token);\n                if let Some(v) = res {\n                    return Ok(v);\n                }\n            }\n        }\n    }\n\n    Err(anyhow!(\"Logon SID not present on token\"))\n}\n\nunsafe fn get_user_sid_bytes(h_token: HANDLE) -> Result<Vec<u8>> {\n    let mut needed: u32 = 0;\n    GetTokenInformation(h_token, TokenUser, std::ptr::null_mut(), 0, &mut needed);\n    if needed == 0 {\n        return Err(anyhow!(\"TokenUser size query returned 0\"));\n    }\n    let mut user_buf: Vec<u8> = vec![0u8; needed as usize];\n    let ok = GetTokenInformation(\n        h_token,\n        TokenUser,\n        user_buf.as_mut_ptr() as *mut c_void,\n        needed,\n        &mut needed,\n    );\n    if ok == 0 || (needed as usize) < std::mem::size_of::<TOKEN_USER>() {\n        return Err(anyhow!(\n            \"GetTokenInformation(TokenUser) failed: {}\",\n            GetLastError()\n        ));\n    }\n    let token_user: TOKEN_USER = std::ptr::read_unaligned(user_buf.as_ptr() as *const TOKEN_USER);\n    let sid_len = GetLengthSid(token_user.User.Sid);\n    if sid_len == 0 {","sourceCodeStart":265,"sourceCodeEnd":301,"githubUrl":"https://github.com/openai/codex/blob/339751715c64496cb86246bfb3935f40e309dd3d/codex-rs/windows-sandbox-rs/src/token.rs#L265-L301","documentation":"Error \"TokenUser size query returned 0\" thrown in openai/codex.","triggerScenarios":"Thrown at codex-rs/windows-sandbox-rs/src/token.rs:283 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"339751715c64496cb86246bfb3935f40e309dd3d","analyzedAt":"2026-08-25T05:35:09.876Z","schemaVersion":2},"datasetVersion":"2026-08-25T06:17:31.827Z"}