Walkthrough

A validation step was added to the Statement::new function in the SQLite module, ensuring that SQL statement strings containing null ('\0') characters are detected and rejected with a ProgrammingError. This check is performed after UTF-8 conversion and before further processing.

Changes

Sequence Diagram(s)

sequenceDiagram
    participant Caller
    participant Statement
    participant Error

    Caller->>Statement: new(sql_string)
    Statement->>Statement: Convert sql_string to UTF-8
    Statement->>Statement: Check for null ('\0') character
    alt Null character found
        Statement->>Error: Return ProgrammingError("statement contains a null character")
    else No null character
        Statement->>Statement: Proceed to C string conversion and statement preparation
    end
    Statement-->>Caller: Return result (Statement or Error)

Possibly related PRs

• Introduce PyUtf8Str and fix(sqlite): validate surrogates in SQL statements #5969: Both PRs modify Statement::new to improve input validation, with one focusing on null character checks and the other on UTF-8 surrogate validation.

Suggested reviewers

• youknowone

Poem

In the land of code where queries dwell,
A sneaky null char tried to cast its spell.
But now, with a check both sharp and bright,
No phantom bytes escape our sight!
🐇✨
Bugs beware—your tricks won't fare!

Configuration used: .coderabbit.yml
Review profile: CHILL
Plan: Pro

Reviewing files that changed from the base of the PR and between a54873d and 062278e.

• Lib/test/test_sqlite3/test_regression.py is excluded by !Lib/**

• stdlib/src/sqlite.rs (1 hunks)

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stdlib/src/sqlite.rs (1)

2298-2303: LGTM! Excellent security improvement that aligns with CPython behavior.

This validation correctly prevents SQL injection vulnerabilities that could arise from embedded null characters truncating SQL statements when converted to C strings. The check is well-positioned after UTF-8 conversion and before C string conversion, providing early failure with an appropriate ProgrammingError.

• 📝 Generate Docstrings

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