Revert "Do validation earlier in CPDF_SampledFunc::v_Init()."
This reverts commit 54e6da1ee793f436341dfcdc4e0c26b0658d1928.
Reason for revert: Checks not ordered correctly.
Original change's description:
> Do validation earlier in CPDF_SampledFunc::v_Init().
>
> Change-Id: Ib44b39aea419230f73583caf69313a2f92557397
> Reviewed-on: https://pdfium-review.googlesource.com/30932
> Commit-Queue: Lei Zhang <thestig@chromium.org>
> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
TBR=thestig@chromium.org,hnakashima@chromium.org
Change-Id: I133ca5add12c173dd05ef995b5834c3058d814cd
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://pdfium-review.googlesource.com/31050
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/core/fpdfapi/page/cpdf_sampledfunc.cpp b/core/fpdfapi/page/cpdf_sampledfunc.cpp
index 21a1db4..cdedc86 100644
--- a/core/fpdfapi/page/cpdf_sampledfunc.cpp
+++ b/core/fpdfapi/page/cpdf_sampledfunc.cpp
@@ -50,21 +50,10 @@
if (!IsValidBitsPerSample(m_nBitsPerSample))
return false;
- FX_SAFE_UINT32 nTotalSampleBits = 1;
- nTotalSampleBits *= m_nBitsPerSample;
- nTotalSampleBits *= m_nOutputs;
- FX_SAFE_UINT32 nTotalSampleBytes = nTotalSampleBits;
- nTotalSampleBytes += 7;
- nTotalSampleBytes /= 8;
- if (!nTotalSampleBytes.IsValid() || nTotalSampleBytes.ValueOrDie() == 0)
- return false;
-
m_SampleMax = 0xffffffff >> (32 - m_nBitsPerSample);
m_pSampleStream = pdfium::MakeRetain<CPDF_StreamAcc>(pStream);
m_pSampleStream->LoadAllDataFiltered();
- if (nTotalSampleBytes.ValueOrDie() > m_pSampleStream->GetSize())
- return false;
-
+ FX_SAFE_UINT32 nTotalSampleBits = 1;
m_EncodeInfo.resize(m_nInputs);
for (uint32_t i = 0; i < m_nInputs; i++) {
m_EncodeInfo[i].sizes = pSize ? pSize->GetIntegerAt(i) : 0;
@@ -80,6 +69,15 @@
m_EncodeInfo[i].sizes == 1 ? 1 : (float)m_EncodeInfo[i].sizes - 1;
}
}
+ nTotalSampleBits *= m_nBitsPerSample;
+ nTotalSampleBits *= m_nOutputs;
+ FX_SAFE_UINT32 nTotalSampleBytes = nTotalSampleBits;
+ nTotalSampleBytes += 7;
+ nTotalSampleBytes /= 8;
+ if (!nTotalSampleBytes.IsValid() || nTotalSampleBytes.ValueOrDie() == 0 ||
+ nTotalSampleBytes.ValueOrDie() > m_pSampleStream->GetSize()) {
+ return false;
+ }
m_DecodeInfo.resize(m_nOutputs);
for (uint32_t i = 0; i < m_nOutputs; i++) {
if (pDecode) {