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Handle pasted data of certain types with an odd length.

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Alex Gaynor 2019-02-07 14:08:09 +01:00 • committed by Roy Tam
commit 84cc1f3239
1 changed files with 7 additions and 4 deletions
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11
widget/windows/nsClipboard.cpp
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@ -283,16 +283,19 @@ nsresult nsClipboard::GetGlobalData(HGLOBAL aHGBL, void ** aData, uint32_t * aLe
{ {
// Allocate a new memory buffer and copy the data from global memory. // Allocate a new memory buffer and copy the data from global memory.
// Recall that win98 allocates to nearest DWORD boundary. As a safety // Recall that win98 allocates to nearest DWORD boundary. As a safety
// precaution, allocate an extra 2 bytes (but don't report them!) and // precaution, allocate an extra 3 bytes (but don't report them in |aLen|!)
// null them out to ensure that all of our strlen calls will succeed. // and null them out to ensure that all of our NS_strlen calls will succeed.
// NS_strlen operates on char16_t, so we need 3 NUL bytes to ensure it finds
// a full NUL char16_t when |*aLen| is odd.
nsresult result = NS_ERROR_FAILURE; nsresult result = NS_ERROR_FAILURE;
if (aHGBL != nullptr) { if (aHGBL != nullptr) {
LPSTR lpStr = (LPSTR) GlobalLock(aHGBL); LPSTR lpStr = (LPSTR) GlobalLock(aHGBL);
DWORD allocSize = GlobalSize(aHGBL); DWORD allocSize = GlobalSize(aHGBL);
char* data = static_cast<char*>(malloc(allocSize + sizeof(char16_t))); char* data = static_cast<char*>(malloc(allocSize + 3));
if ( data ) { if ( data ) {
memcpy ( data, lpStr, allocSize ); memcpy ( data, lpStr, allocSize );
data[allocSize] = data[allocSize + 1] = '\0'; // null terminate for safety data[allocSize] = data[allocSize + 1] = data[allocSize + 2] =
'\0'; // null terminate for safety
GlobalUnlock(aHGBL); GlobalUnlock(aHGBL);
*aData = data; *aData = data;