Files
pdfcraft/vendor/lopdf/tests/utils.rs
Brandon ThomasandClaude Opus 5.5 1449b71a19 Never crash: bound the allocations behind the nightly fuzz runner's out-of-memory deaths
Fuzzed inputs drove one check-one process to 2-6 GB (the 16 GB CI runner
running two of them was killed every night). Three causes, each with a test:
- lopdf (bootstrap inspector) sized PNG predictor rows from /Columns before
  reading data: /Columns 4294967295 allocated two 4 GiB rows. Vendored lopdf
  0.45.0 refuses rows longer than the data (and uses saturating row widths);
  its load-time stream decoding also gets a 256 MiB limit (it had none).
- hayro sized a tiling pattern's cell pixmap from /XStep x scale, bounded only
  by u16: a step far beyond /BBox allocated 2 GB. The vendored patch keeps
  the cell within 3000 px a side, lowering the resolution instead.
- cos decoded cross-reference streams up to the general 1 GiB limit; they now
  stop at what 8,388,607 objects' rows can hold (~200 MB at most), and the
  section is reconstructed (logged) instead.

On the nightly's seed (41) the worst captured input fell from 6.2 GB to 6 MB,
and a 300 s fuzz run had no process above 300 MB (before: many at 2-5 GB).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-04 17:59:25 -04:00

38 lines
983 B
Rust

use lopdf::{Document, IncrementalDocument, Result};
use std::fmt::Display;
use std::path::Path;
#[allow(dead_code)]
pub fn load_document<P>(path: P) -> Result<Document>
where
P: AsRef<Path> + Display,
{
#[cfg(feature = "async")]
let doc = tokio::runtime::Runtime::new()?.block_on(async move {
Document::load(&path)
.await
.unwrap_or_else(|_| panic!("Failed to load {}", path))
});
#[cfg(not(feature = "async"))]
let doc = Document::load(path)?;
Ok(doc)
}
#[allow(dead_code)]
pub fn load_incremental_document<P>(path: P) -> Result<IncrementalDocument>
where
P: AsRef<Path> + Display,
{
#[cfg(feature = "async")]
let doc = tokio::runtime::Runtime::new()?.block_on(async move {
IncrementalDocument::load(&path)
.await
.unwrap_or_else(|_| panic!("Failed to load {}", path))
});
#[cfg(not(feature = "async"))]
let doc = IncrementalDocument::load(path)?;
Ok(doc)
}