Module: wine Branch: master Commit: dbf123ba0dccbe39cf44483eb122f74c9da23cc8 URL: http://source.winehq.org/git/wine.git/?a=commit;h=dbf123ba0dccbe39cf44483eb1...
Author: Vincent Povirk vincent@codeweavers.com Date: Thu May 6 11:36:41 2010 -0500
ole32: Fix reads past the end of streams.
---
dlls/ole32/storage32.c | 46 +++++++++++++++++++++++++++----- dlls/ole32/tests/storage32.c | 59 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/dlls/ole32/storage32.c b/dlls/ole32/storage32.c index 9ac794e..bc1fb96 100644 --- a/dlls/ole32/storage32.c +++ b/dlls/ole32/storage32.c @@ -3584,6 +3584,9 @@ HRESULT StorageImpl_ReadRawDirEntry(StorageImpl *This, ULONG index, BYTE *buffer buffer, &bytesRead);
+ if (bytesRead != RAW_DIRENTRY_SIZE) + return STG_E_READFAULT; + return hr; }
@@ -3929,6 +3932,11 @@ BlockChainStream* Storage32Impl_SmallBlocksToBigBlocks(
offset.u.LowPart += cbRead; } + else + { + resRead = STG_E_READFAULT; + break; + } } while (cbTotalRead.QuadPart < size.QuadPart); HeapFree(GetProcessHeap(),0,buffer);
@@ -4027,6 +4035,11 @@ SmallBlockChainStream* Storage32Impl_BigBlocksToSmallBlocks(
offset.u.LowPart += cbRead; } + else + { + resRead = STG_E_READFAULT; + break; + } }while(cbTotalRead.QuadPart < size.QuadPart); HeapFree(GetProcessHeap(), 0, buffer);
@@ -5810,6 +5823,7 @@ HRESULT BlockChainStream_ReadAt(BlockChainStream* This, ULONG bytesToReadInBuffer; ULONG blockIndex; BYTE* bufferWalker; + ULARGE_INTEGER stream_size;
TRACE("(%p)-> %i %p %i %p\n",This, offset.u.LowPart, buffer, size, bytesRead);
@@ -5818,13 +5832,17 @@ HRESULT BlockChainStream_ReadAt(BlockChainStream* This, */ blockIndex = BlockChainStream_GetSectorOfOffset(This, blockNoInSequence);
- if (blockIndex == BLOCK_END_OF_CHAIN) - return STG_E_DOCFILECORRUPT; /* We failed to find the starting block */ + *bytesRead = 0; + + stream_size = BlockChainStream_GetSize(This); + if (stream_size.QuadPart > offset.QuadPart) + size = min(stream_size.QuadPart - offset.QuadPart, size); + else + return S_OK;
/* * Start reading the buffer. */ - *bytesRead = 0; bufferWalker = buffer;
while ( (size > 0) && (blockIndex != BLOCK_END_OF_CHAIN) ) @@ -5862,7 +5880,7 @@ HRESULT BlockChainStream_ReadAt(BlockChainStream* This, break; }
- return (size == 0) ? S_OK : STG_E_READFAULT; + return S_OK; }
/****************************************************************************** @@ -6295,6 +6313,9 @@ static HRESULT SmallBlockChainStream_GetNextBlockInChain( &buffer, &bytesRead);
+ if (SUCCEEDED(res) && bytesRead != sizeof(DWORD)) + res = STG_E_READFAULT; + if (SUCCEEDED(res)) { StorageUtl_ReadDWord((BYTE *)&buffer, 0, nextBlockInChain); @@ -6386,7 +6407,7 @@ static ULONG SmallBlockChainStream_GetNextFreeBlock( /* * If we run out of space for the small block depot, enlarge it */ - if (SUCCEEDED(res)) + if (SUCCEEDED(res) && bytesRead == sizeof(DWORD)) { StorageUtl_ReadDWord((BYTE *)&buffer, 0, &nextBlockIndex);
@@ -6482,12 +6503,21 @@ HRESULT SmallBlockChainStream_ReadAt( ULONG blockIndex; ULONG bytesReadFromBigBlockFile; BYTE* bufferWalker; + ULARGE_INTEGER stream_size;
/* * This should never happen on a small block file. */ assert(offset.u.HighPart==0);
+ *bytesRead = 0; + + stream_size = SmallBlockChainStream_GetSize(This); + if (stream_size.QuadPart > offset.QuadPart) + size = min(stream_size.QuadPart - offset.QuadPart, size); + else + return S_OK; + /* * Find the first block in the stream that contains part of the buffer. */ @@ -6504,7 +6534,6 @@ HRESULT SmallBlockChainStream_ReadAt( /* * Start reading the buffer. */ - *bytesRead = 0; bufferWalker = buffer;
while ( (size > 0) && (blockIndex != BLOCK_END_OF_CHAIN) ) @@ -6538,6 +6567,9 @@ HRESULT SmallBlockChainStream_ReadAt( if (FAILED(rc)) return rc;
+ if (!bytesReadFromBigBlockFile) + return STG_E_DOCFILECORRUPT; + /* * Step to the next big block. */ @@ -6551,7 +6583,7 @@ HRESULT SmallBlockChainStream_ReadAt( offsetInBlock = (offsetInBlock + bytesReadFromBigBlockFile) % This->parentStorage->smallBlockSize; }
- return (size == 0) ? S_OK : STG_E_READFAULT; + return S_OK; }
/****************************************************************************** diff --git a/dlls/ole32/tests/storage32.c b/dlls/ole32/tests/storage32.c index 8fa1afd..9bd8f33 100644 --- a/dlls/ole32/tests/storage32.c +++ b/dlls/ole32/tests/storage32.c @@ -315,6 +315,55 @@ static void test_storage_stream(void) r = IStream_Commit(stm, STGC_DEFAULT ); ok(r==S_OK, "failed to commit stream\n");
+ /* Read past the end of the stream. */ + pos.QuadPart = 3; + r = IStream_Seek(stm, pos, STREAM_SEEK_SET, &p ); + ok(r==S_OK, "failed to seek stream\n"); + ok(p.QuadPart == 3, "at wrong place\n"); + r = IStream_Read(stm, buffer, sizeof buffer, &count ); + ok(r==S_OK, "failed to read\n"); + ok(count == 3, "read bytes past end of stream\n"); + pos.QuadPart = 10; + r = IStream_Seek(stm, pos, STREAM_SEEK_SET, &p ); + ok(r==S_OK, "failed to seek stream\n"); + ok(p.QuadPart == 10, "at wrong place\n"); + r = IStream_Read(stm, buffer, sizeof buffer, &count ); + ok(r==S_OK, "failed to read\n"); + ok(count == 0, "read bytes past end of stream\n"); + pos.QuadPart = 10000; + r = IStream_Seek(stm, pos, STREAM_SEEK_SET, &p ); + ok(r==S_OK, "failed to seek stream\n"); + ok(p.QuadPart == 10000, "at wrong place\n"); + r = IStream_Read(stm, buffer, sizeof buffer, &count ); + ok(r==S_OK, "failed to read\n"); + ok(count == 0, "read bytes past end of stream\n"); + + /* Convert to a big block stream, and read past the end. */ + p.QuadPart = 5000; + r = IStream_SetSize(stm,p); + ok(r==S_OK, "failed to set pos\n"); + pos.QuadPart = 4997; + r = IStream_Seek(stm, pos, STREAM_SEEK_SET, &p ); + ok(r==S_OK, "failed to seek stream\n"); + ok(p.QuadPart == 4997, "at wrong place\n"); + r = IStream_Read(stm, buffer, sizeof buffer, &count ); + ok(r==S_OK, "failed to read\n"); + ok(count == 3, "read bytes past end of stream\n"); + pos.QuadPart = 5001; + r = IStream_Seek(stm, pos, STREAM_SEEK_SET, &p ); + ok(r==S_OK, "failed to seek stream\n"); + ok(p.QuadPart == 5001, "at wrong place\n"); + r = IStream_Read(stm, buffer, sizeof buffer, &count ); + ok(r==S_OK, "failed to read\n"); + ok(count == 0, "read bytes past end of stream\n"); + pos.QuadPart = 10000; + r = IStream_Seek(stm, pos, STREAM_SEEK_SET, &p ); + ok(r==S_OK, "failed to seek stream\n"); + ok(p.QuadPart == 10000, "at wrong place\n"); + r = IStream_Read(stm, buffer, sizeof buffer, &count ); + ok(r==S_OK, "failed to read\n"); + ok(count == 0, "read bytes past end of stream\n"); + /* seek round a bit, reset the stream size */ pos.QuadPart = 0; r = IStream_Seek(stm, pos, 3, &p ); @@ -329,6 +378,16 @@ static void test_storage_stream(void) r = IStream_Seek(stm, pos, STREAM_SEEK_SET, &p ); ok(r==S_OK, "failed to seek stream\n"); ok(p.QuadPart == 10, "at wrong place\n"); + r = IStream_Read(stm, buffer, sizeof buffer, &count ); + ok(r==S_OK, "failed to set pos\n"); + ok(count == 0, "read bytes from empty stream\n"); + pos.QuadPart = 10000; + r = IStream_Seek(stm, pos, STREAM_SEEK_SET, &p ); + ok(r==S_OK, "failed to seek stream\n"); + ok(p.QuadPart == 10000, "at wrong place\n"); + r = IStream_Read(stm, buffer, sizeof buffer, &count ); + ok(r==S_OK, "failed to set pos\n"); + ok(count == 0, "read bytes from empty stream\n"); pos.QuadPart = 0; r = IStream_Seek(stm, pos, STREAM_SEEK_END, &p ); ok(r==S_OK, "failed to seek stream\n");
-
Alexandre Julliard