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-rw-r--r--core/fpdfapi/parser/cpdf_hint_tables.cpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/core/fpdfapi/parser/cpdf_hint_tables.cpp b/core/fpdfapi/parser/cpdf_hint_tables.cpp
index 123e6594c1..9cd72c7815 100644
--- a/core/fpdfapi/parser/cpdf_hint_tables.cpp
+++ b/core/fpdfapi/parser/cpdf_hint_tables.cpp
@@ -294,8 +294,8 @@ bool CPDF_HintTables::ReadSharedObjHintTable(CFX_BitStream* hStream,
uint32_t dwDeltaGroupLen = hStream->GetBits(16);
// Trying to decode more than 32 bits isn't going to work when we write into
- // a uint32_t.
- if (dwDeltaGroupLen > 31)
+ // a uint32_t. Decoding 0 bits also makes no sense.
+ if (!IsValidPageOffsetHintTableBitCount(dwDeltaGroupLen))
return false;
if (dwFirstSharedObjNum >= CPDF_Parser::kMaxObjectNumber ||