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wasmparser: Relocation range end can wrap on 32-bit targets #2497

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Merged
dicej merged 2 commits into from
Apr 17, 2026
+6 −2
Merged

wasmparser: Relocation range end can wrap on 32-bit targets #2497

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wasmparser: Relocation range end can wrap on 32-bit targets
jedisct1 Apr 17, 2026
4acca0b
FOrmat
jedisct1 Apr 17, 2026
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8 changes: 6 additions & 2 deletions crates/wasmparser/src/readers/core/reloc.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -242,8 +242,12 @@ pub struct RelocationEntry {
impl RelocationEntry {
/// Byte range relative to the start of the section indicated by
/// `RelocSectionReader::section` targeted by this relocation.
pub fn relocation_range(&self) -> Range<usize> {
(self.offset as usize)..(self.offset as usize + self.ty.extent())
pub fn relocation_range(&self) -> Result<Range<usize>> {
let start = self.offset as usize;
let end = start
.checked_add(self.ty.extent())
.ok_or_else(|| crate::BinaryReaderError::new("relocation range end overflow", start))?;
Ok(start..end)
}
}

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