1 files changed, 0 insertions, 4 deletions
diff --git a/core/fxcodec/jbig2/JBig2_Context.cpp b/core/fxcodec/jbig2/JBig2_Context.cpp
index 4656bfa084..3a868c1486 100644
--- a/core/fxcodec/jbig2/JBig2_Context.cpp
+++ b/core/fxcodec/jbig2/JBig2_Context.cpp
@@ -817,7 +817,6 @@ JBig2_Result CJBig2_Context::ParseTextRegion(CJBig2_Segment* pSegment) {
   if (pTRD->SBREFINE == 1) {
     const size_t size = GetRefAggContextSize(pTRD->SBRTEMPLATE);
     grContext.reset(FX_Alloc(JBig2ArithCtx, size));
-    memset(grContext.get(), 0, sizeof(JBig2ArithCtx) * size);
   }
   if (pTRD->SBHUFF == 0) {
     auto pArithDecoder =
@@ -871,7 +870,6 @@ JBig2_Result CJBig2_Context::ParsePatternDict(CJBig2_Segment* pSegment,
     const size_t size = GetHuffContextSize(pPDD->HDTEMPLATE);
     std::unique_ptr<JBig2ArithCtx, FxFreeDeleter> gbContext(
         FX_Alloc(JBig2ArithCtx, size));
-    memset(gbContext.get(), 0, sizeof(JBig2ArithCtx) * size);
     auto pArithDecoder =
         pdfium::MakeUnique<CJBig2_ArithDecoder>(m_pStream.get());
     pSegment->m_PatternDict =
@@ -940,7 +938,6 @@ JBig2_Result CJBig2_Context::ParseHalftoneRegion(CJBig2_Segment* pSegment,
     const size_t size = GetHuffContextSize(pHRD->HTEMPLATE);
     std::unique_ptr<JBig2ArithCtx, FxFreeDeleter> gbContext(
         FX_Alloc(JBig2ArithCtx, size));
-    memset(gbContext.get(), 0, sizeof(JBig2ArithCtx) * size);
     auto pArithDecoder =
         pdfium::MakeUnique<CJBig2_ArithDecoder>(m_pStream.get());
     pSegment->m_Image =
@@ -1123,7 +1120,6 @@ JBig2_Result CJBig2_Context::ParseGenericRefinementRegion(
   const size_t size = GetRefAggContextSize(pGRRD->GRTEMPLATE);
   std::unique_ptr<JBig2ArithCtx, FxFreeDeleter> grContext(
       FX_Alloc(JBig2ArithCtx, size));
-  memset(grContext.get(), 0, sizeof(JBig2ArithCtx) * size);
   auto pArithDecoder = pdfium::MakeUnique<CJBig2_ArithDecoder>(m_pStream.get());
   pSegment->m_nResultType = JBIG2_IMAGE_POINTER;
   pSegment->m_Image = pGRRD->Decode(pArithDecoder.get(), grContext.get());