fix: reject oversized string/list/map sizes during decode#88
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Decoded string/[]byte/list/map lengths that exceed the remaining buffer can not possibly be valid, so allocating for them risks huge allocations or OOM on corrupted data. Detect these before allocating and return a thrift SIZE_LIMIT protocol exception, distinct from io.ErrShortBuffer. Also guard the size-header reads themselves: a buffer too short to even hold the length header now returns io.ErrShortBuffer instead of panicking with an index out of range.
YangruiEmma
approved these changes
Jun 5, 2026
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Decoded string/[]byte/list/map lengths that exceed the remaining buffer can not possibly be valid, so allocating for them risks huge allocations or OOM on corrupted data. Detect these before allocating and return a thrift SIZE_LIMIT protocol exception, distinct from io.ErrShortBuffer.
Also guard the size-header reads themselves: a buffer too short to even hold the length header now returns io.ErrShortBuffer instead of panicking with an index out of range.