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libfreerdp-core: fix for cursor hot spot out of range

This commit is contained in:
Jay Sorg 2012-03-18 12:34:08 -07:00 committed by Anthony Tong
parent 6752fb4983
commit dd0d0f0bdb
1 changed files with 11 additions and 0 deletions
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11
libfreerdp-core/update.c
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@ -175,6 +175,17 @@ void update_read_pointer_color(STREAM* s, POINTER_COLOR_UPDATE* pointer_color)
stream_read_uint16(s, pointer_color->lengthAndMask); /* lengthAndMask (2 bytes) */
stream_read_uint16(s, pointer_color->lengthXorMask); /* lengthXorMask (2 bytes) */
/**
* There does not seem to be any documentation on why
* xPos / yPos can be larger than width / height
* so it is missing in documentation or a bug in implementation
* 2.2.9.1.1.4.4 Color Pointer Update (TS_COLORPOINTERATTRIBUTE)
*/
if (pointer_color->xPos >= pointer_color->width)
pointer_color->xPos = 0;
if (pointer_color->yPos >= pointer_color->height)
pointer_color->yPos = 0;
if (pointer_color->lengthXorMask > 0)
{
pointer_color->xorMaskData = (uint8*) xmalloc(pointer_color->lengthXorMask);