ole32: Add a check for a condition where a stream has an invalid size

and so there aren't enough blocks in the chain to write data into.

ole32: Add a check for a condition where a stream has an invalid size
aa336618 · Robert Shearman · Alexandre Julliard · 106156cb · aa336618
Commit aa336618 authored Sep 11, 2006 by Robert Shearman Committed by Alexandre Julliard Sep 11, 2006
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storage32.c dlls/ole32/storage32.c +8 -0

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--- a/dlls/ole32/storage32.c
+++ b/dlls/ole32/storage32.c
@@ -4656,6 +4656,14 @@ HRESULT BlockChainStream_WriteAt(BlockChainStream* This,

  This->lastBlockNoInSequenceIndex = blockIndex;

+  /* BlockChainStream_SetSize should have already been called to ensure we have
+   * enough blocks in the chain to write into */
+  if (blockIndex == BLOCK_END_OF_CHAIN)
+  {
+    ERR("not enough blocks in chain to write data\n");
+    return STG_E_DOCFILECORRUPT;
+  }
+
  /*
   * Here, I'm casting away the constness on the buffer variable
   * This is OK since we don't intend to modify that buffer.