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-rw-r--r--indra/llcommon/llsdserialize.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/indra/llcommon/llsdserialize.cpp b/indra/llcommon/llsdserialize.cpp
index d49ff0feb5..81ba8631c6 100644
--- a/indra/llcommon/llsdserialize.cpp
+++ b/indra/llcommon/llsdserialize.cpp
@@ -1200,6 +1200,7 @@ bool LLSDBinaryParser::parseString(
read(istr, (char*)&value_nbo, sizeof(U32)); /*Flawfinder: ignore*/
S32 size = (S32)ntohl(value_nbo);
if(mCheckLimits && (size > mMaxBytesLeft)) return false;
+ if(size < 0) return false;
std::vector<char> buf;
if(size)
{