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Merge feat/redact-jbig2: a page past the cap may be refused by the decoder first

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AmsdeUCdTaD72jkDw2pJKY
This commit is contained in:
Grzegorz Martens
2026-10-31 08:33:12 +01:00
co-authored by Claude Opus 5.5
parent fc389071e2 738cbadab7
commit 967c610aae
1 changed files with 3 additions and 2 deletions
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crates/filters/src/jbig2/decode.rs
+3 -2
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@@ -137,9 +137,10 @@ mod tests {
let page = 26 * h as usize;
assert!(matches!(decode_jbig2(&data, None, w, h, page - 1), Err(FilterError::LimitExceeded(m)) if m == page - 1), "a byte short");
assert_eq!(decode_jbig2(&data, None, w, h, page).unwrap().len(), page, "the page within max");
// 16,384 × 16,384 is 2^28 pixels, and fails only later; a row more is past the cap.
// 16,384 × 16,384 is 2^28 pixels, and fails only later; a row more is past the cap, here or
// in the decoder, which can refuse it first.
let large = |rows| decode_jbig2(&page_of(&data, 16_384, rows), None, 16_384, rows, usize::MAX);
assert!(matches!(large(16_385), Err(FilterError::Unsupported(_))), "{:?}", large(16_385));
assert!(matches!(large(16_385), Err(FilterError::Unsupported(_) | FilterError::Corrupt { .. })), "{:?}", large(16_385));
assert!(!matches!(large(16_384), Err(FilterError::Unsupported(_))), "{:?}", large(16_384));
// An extension segment (ISO/IEC 14492 7.4.14), which a decoder skips: its 11-byte header