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Bug fix. Error on 0 offset copies.

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PiperOrigin-RevId: 342447553
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Snappy Team
2020-11-14 21:55:24 +00:00
committed by Victor Costan
parent 289c8a3c0a
commit 719bed0ae2
1 changed files with 2 additions and 0 deletions
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snappy.cc
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@@ -892,6 +892,8 @@ std::pair<const uint8_t*, char*> DecompressBranchless(
// always succeed for literals. // always succeed for literals.
if (SNAPPY_PREDICT_FALSE(offset < len)) { if (SNAPPY_PREDICT_FALSE(offset < len)) {
assert(tag_type != 0); assert(tag_type != 0);
// offset 0 is an error.
if (SNAPPY_PREDICT_FALSE(offset == 0)) break;
op = IncrementalCopy(op_base + delta, op_base + op, op_base + op + len, op = IncrementalCopy(op_base + delta, op_base + op, op_base + op + len,
op_base + op_limit) - op_base + op_limit) -
op_base; op_base;