diff options
Diffstat (limited to 'xorg-server/glx/rensize.c')
| -rw-r--r-- | xorg-server/glx/rensize.c | 114 |
1 files changed, 69 insertions, 45 deletions
diff --git a/xorg-server/glx/rensize.c b/xorg-server/glx/rensize.c index 884369d8f..a9227b537 100644 --- a/xorg-server/glx/rensize.c +++ b/xorg-server/glx/rensize.c @@ -47,19 +47,11 @@ (((a & 0xff000000U)>>24) | ((a & 0xff0000U)>>8) | \ ((a & 0xff00U)<<8) | ((a & 0xffU)<<24)) -static int -Map1Size(GLint k, GLint order) -{ - if (order <= 0 || k < 0) - return -1; - return k * order; -} - int -__glXMap1dReqSize(const GLbyte * pc, Bool swap) +__glXMap1dReqSize(const GLbyte * pc, Bool swap, int reqlen) { GLenum target; - GLint order, k; + GLint order; target = *(GLenum *) (pc + 16); order = *(GLint *) (pc + 20); @@ -67,15 +59,16 @@ __glXMap1dReqSize(const GLbyte * pc, Bool swap) target = SWAPL(target); order = SWAPL(order); } - k = __glMap1d_size(target); - return 8 * Map1Size(k, order); + if (order < 1) + return -1; + return safe_mul(8, safe_mul(__glMap1d_size(target), order)); } int -__glXMap1fReqSize(const GLbyte * pc, Bool swap) +__glXMap1fReqSize(const GLbyte * pc, Bool swap, int reqlen) { GLenum target; - GLint order, k; + GLint order; target = *(GLenum *) (pc + 0); order = *(GLint *) (pc + 12); @@ -83,23 +76,24 @@ __glXMap1fReqSize(const GLbyte * pc, Bool swap) target = SWAPL(target); order = SWAPL(order); } - k = __glMap1f_size(target); - return 4 * Map1Size(k, order); + if (order < 1) + return -1; + return safe_mul(4, safe_mul(__glMap1f_size(target), order)); } static int Map2Size(int k, int majorOrder, int minorOrder) { - if (majorOrder <= 0 || minorOrder <= 0 || k < 0) + if (majorOrder < 1 || minorOrder < 1) return -1; - return k * majorOrder * minorOrder; + return safe_mul(k, safe_mul(majorOrder, minorOrder)); } int -__glXMap2dReqSize(const GLbyte * pc, Bool swap) +__glXMap2dReqSize(const GLbyte * pc, Bool swap, int reqlen) { GLenum target; - GLint uorder, vorder, k; + GLint uorder, vorder; target = *(GLenum *) (pc + 32); uorder = *(GLint *) (pc + 36); @@ -109,15 +103,14 @@ __glXMap2dReqSize(const GLbyte * pc, Bool swap) uorder = SWAPL(uorder); vorder = SWAPL(vorder); } - k = __glMap2d_size(target); - return 8 * Map2Size(k, uorder, vorder); + return safe_mul(8, Map2Size(__glMap2d_size(target), uorder, vorder)); } int -__glXMap2fReqSize(const GLbyte * pc, Bool swap) +__glXMap2fReqSize(const GLbyte * pc, Bool swap, int reqlen) { GLenum target; - GLint uorder, vorder, k; + GLint uorder, vorder; target = *(GLenum *) (pc + 0); uorder = *(GLint *) (pc + 12); @@ -127,8 +120,7 @@ __glXMap2fReqSize(const GLbyte * pc, Bool swap) uorder = SWAPL(uorder); vorder = SWAPL(vorder); } - k = __glMap2f_size(target); - return 4 * Map2Size(k, uorder, vorder); + return safe_mul(4, Map2Size(__glMap2f_size(target), uorder, vorder)); } /** @@ -179,14 +171,16 @@ __glXImageSize(GLenum format, GLenum type, GLenum target, GLint bytesPerElement, elementsPerGroup, groupsPerRow; GLint groupSize, rowSize, padding, imageSize; + if (w == 0 || h == 0 || d == 0) + return 0; + if (w < 0 || h < 0 || d < 0 || (type == GL_BITMAP && (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX))) { return -1; } - if (w == 0 || h == 0 || d == 0) - return 0; + /* proxy targets have no data */ switch (target) { case GL_PROXY_TEXTURE_1D: case GL_PROXY_TEXTURE_2D: @@ -203,6 +197,12 @@ __glXImageSize(GLenum format, GLenum type, GLenum target, return 0; } + /* real data has to have real sizes */ + if (imageHeight < 0 || rowLength < 0 || skipImages < 0 || skipRows < 0) + return -1; + if (alignment != 1 && alignment != 2 && alignment != 4 && alignment != 8) + return -1; + if (type == GL_BITMAP) { if (rowLength > 0) { groupsPerRow = rowLength; @@ -211,11 +211,14 @@ __glXImageSize(GLenum format, GLenum type, GLenum target, groupsPerRow = w; } rowSize = bits_to_bytes(groupsPerRow); + if (rowSize < 0) + return -1; padding = (rowSize % alignment); if (padding) { rowSize += alignment - padding; } - return ((h + skipRows) * rowSize); + + return safe_mul(safe_add(h, skipRows), rowSize); } else { switch (format) { @@ -228,6 +231,11 @@ __glXImageSize(GLenum format, GLenum type, GLenum target, case GL_ALPHA: case GL_LUMINANCE: case GL_INTENSITY: + case GL_RED_INTEGER_EXT: + case GL_GREEN_INTEGER_EXT: + case GL_BLUE_INTEGER_EXT: + case GL_ALPHA_INTEGER_EXT: + case GL_LUMINANCE_INTEGER_EXT: elementsPerGroup = 1; break; case GL_422_EXT: @@ -238,14 +246,19 @@ __glXImageSize(GLenum format, GLenum type, GLenum target, case GL_DEPTH_STENCIL_MESA: case GL_YCBCR_MESA: case GL_LUMINANCE_ALPHA: + case GL_LUMINANCE_ALPHA_INTEGER_EXT: elementsPerGroup = 2; break; case GL_RGB: case GL_BGR: + case GL_RGB_INTEGER_EXT: + case GL_BGR_INTEGER_EXT: elementsPerGroup = 3; break; case GL_RGBA: case GL_BGRA: + case GL_RGBA_INTEGER_EXT: + case GL_BGRA_INTEGER_EXT: case GL_ABGR_EXT: elementsPerGroup = 4; break; @@ -297,6 +310,7 @@ __glXImageSize(GLenum format, GLenum type, GLenum target, default: return -1; } + /* known safe by the switches above, not checked */ groupSize = bytesPerElement * elementsPerGroup; if (rowLength > 0) { groupsPerRow = rowLength; @@ -304,18 +318,21 @@ __glXImageSize(GLenum format, GLenum type, GLenum target, else { groupsPerRow = w; } - rowSize = groupsPerRow * groupSize; + + if ((rowSize = safe_mul(groupsPerRow, groupSize)) < 0) + return -1; padding = (rowSize % alignment); if (padding) { rowSize += alignment - padding; } - if (imageHeight > 0) { - imageSize = (imageHeight + skipRows) * rowSize; - } - else { - imageSize = (h + skipRows) * rowSize; - } - return ((d + skipImages) * imageSize); + + if (imageHeight > 0) + h = imageHeight; + h = safe_add(h, skipRows); + + imageSize = safe_mul(h, rowSize); + + return safe_mul(safe_add(d, skipImages), imageSize); } } @@ -346,13 +363,14 @@ __glXTypeSize(GLenum enm) } int -__glXDrawArraysReqSize(const GLbyte * pc, Bool swap) +__glXDrawArraysReqSize(const GLbyte * pc, Bool swap, int reqlen) { __GLXdispatchDrawArraysHeader *hdr = (__GLXdispatchDrawArraysHeader *) pc; __GLXdispatchDrawArraysComponentHeader *compHeader; GLint numVertexes = hdr->numVertexes; GLint numComponents = hdr->numComponents; GLint arrayElementSize = 0; + GLint x, size; int i; if (swap) { @@ -361,6 +379,13 @@ __glXDrawArraysReqSize(const GLbyte * pc, Bool swap) } pc += sizeof(__GLXdispatchDrawArraysHeader); + reqlen -= sizeof(__GLXdispatchDrawArraysHeader); + + size = safe_mul(sizeof(__GLXdispatchDrawArraysComponentHeader), + numComponents); + if (size < 0 || reqlen < 0 || reqlen < size) + return -1; + compHeader = (__GLXdispatchDrawArraysComponentHeader *) pc; for (i = 0; i < numComponents; i++) { @@ -404,17 +429,18 @@ __glXDrawArraysReqSize(const GLbyte * pc, Bool swap) return -1; } - arrayElementSize += __GLX_PAD(numVals * __glXTypeSize(datatype)); + x = safe_pad(safe_mul(numVals, __glXTypeSize(datatype))); + if ((arrayElementSize = safe_add(arrayElementSize, x)) < 0) + return -1; pc += sizeof(__GLXdispatchDrawArraysComponentHeader); } - return ((numComponents * sizeof(__GLXdispatchDrawArraysComponentHeader)) + - (numVertexes * arrayElementSize)); + return safe_add(size, safe_mul(numVertexes, arrayElementSize)); } int -__glXSeparableFilter2DReqSize(const GLbyte * pc, Bool swap) +__glXSeparableFilter2DReqSize(const GLbyte * pc, Bool swap, int reqlen) { __GLXdispatchConvolutionFilterHeader *hdr = (__GLXdispatchConvolutionFilterHeader *) pc; @@ -439,9 +465,7 @@ __glXSeparableFilter2DReqSize(const GLbyte * pc, Bool swap) /* XXX Should rowLength be used for either or both image? */ image1size = __glXImageSize(format, type, 0, w, 1, 1, 0, rowLength, 0, 0, alignment); - image1size = __GLX_PAD(image1size); image2size = __glXImageSize(format, type, 0, h, 1, 1, 0, rowLength, 0, 0, alignment); - return image1size + image2size; - + return safe_add(safe_pad(image1size), image2size); } |