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blockstorage: simplify partial block read validation

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Use `SaturatingAdd` following https://github.com/bitcoin/bitcoin/pull/33657#discussion_r2610832092.
This commit is contained in:
Roman Zeyde
2025-12-14 10:17:07 +01:00
parent 599effdeab
commit 41118e17f8
1 changed files with 1 additions and 1 deletions
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2
src/node/blockstorage.cpp
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@@ -1083,7 +1083,7 @@ BlockManager::ReadRawBlockResult BlockManager::ReadRawBlock(const FlatFilePos& p
if (block_part) {
const auto [offset, size]{*block_part};
if (size == 0 || offset >= blk_size || size > blk_size - offset) {
if (size == 0 || SaturatingAdd(offset, size) > blk_size) {
return util::Unexpected{ReadRawError::BadPartRange}; // Avoid logging - offset/size come from untrusted REST input
}
filein.seek(offset, SEEK_CUR);