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Fix BSS buffer overflow in osmpbf-outline zlib decompression #95

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Merged
joto merged 1 commit into from
Jul 24, 2026
Merged

Fix BSS buffer overflow in osmpbf-outline zlib decompression #95

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6 changes: 6 additions & 0 deletions tools/osmpbf-outline.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -232,6 +232,12 @@ int main(int argc, char *argv[]) {
debug(" contains zlib-compressed data: %u bytes", sz);
debug(" uncompressed size: %u bytes", blob.raw_size());

// ensure the raw_size fits into the unpack_buffer, otherwise
// zlib would inflate past the end of the fixed-size buffer
if (blob.raw_size() < 0 || blob.raw_size() > OSMPBF::max_uncompressed_blob_size) {
err(" raw_size is bigger then allowed (%d > %u)", blob.raw_size(), OSMPBF::max_uncompressed_blob_size);
}

// zlib information
z_stream z;

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