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xf86dga2.c & xf86vmode.c: Move REQUEST_SIZE_MATCH checks before using stuff 

Seems silly waiting to check if the client failed to send us enough bytes
until after we've already tried using them.

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Keith Packard <keithp@keithp.com>
Tested-by: Daniel Stone <daniel@fooishbar.org>
This commit is contained in:
Alan Coopersmith 2012-07-09 19:12:42 -07:00
parent 2e739a8870
commit ef0f701c92
2 changed files with 52 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

81
hw/xfree86/dixmods/extmod/xf86dga2.c
View File

@ -96,13 +96,14 @@ ProcXDGAOpenFramebuffer(ClientPtr client)
char *deviceName;
int nameSize;
REQUEST_SIZE_MATCH(xXDGAOpenFramebufferReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
if (!DGAAvailable(stuff->screen))
return DGAErrorBase + XF86DGANoDirectVideoMode;
REQUEST_SIZE_MATCH(xXDGAOpenFramebufferReq);
rep.type = X_Reply;
rep.length = 0;
rep.sequenceNumber = client->sequence;
@ -129,14 +130,14 @@ ProcXDGACloseFramebuffer(ClientPtr client)
{
REQUEST(xXDGACloseFramebufferReq);
REQUEST_SIZE_MATCH(xXDGACloseFramebufferReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
if (!DGAAvailable(stuff->screen))
return DGAErrorBase + XF86DGANoDirectVideoMode;
REQUEST_SIZE_MATCH(xXDGACloseFramebufferReq);
DGACloseFramebuffer(stuff->screen);
return Success;
@ -152,10 +153,11 @@ ProcXDGAQueryModes(ClientPtr client)
xXDGAModeInfo info;
XDGAModePtr mode;
REQUEST_SIZE_MATCH(xXDGAQueryModesReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
REQUEST_SIZE_MATCH(xXDGAQueryModesReq);
rep.type = X_Reply;
rep.length = 0;
rep.number = 0;
@ -267,11 +269,12 @@ ProcXDGASetMode(ClientPtr client)
ClientPtr owner;
int size;
REQUEST_SIZE_MATCH(xXDGASetModeReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
owner = DGA_GETCLIENT(stuff->screen);
REQUEST_SIZE_MATCH(xXDGASetModeReq);
rep.type = X_Reply;
rep.length = 0;
rep.offset = 0;
@ -357,14 +360,14 @@ ProcXDGASetViewport(ClientPtr client)
{
REQUEST(xXDGASetViewportReq);
REQUEST_SIZE_MATCH(xXDGASetViewportReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
if (DGA_GETCLIENT(stuff->screen) != client)
return DGAErrorBase + XF86DGADirectNotActivated;
REQUEST_SIZE_MATCH(xXDGASetViewportReq);
DGASetViewport(stuff->screen, stuff->x, stuff->y, stuff->flags);
return Success;
@ -378,14 +381,14 @@ ProcXDGAInstallColormap(ClientPtr client)
REQUEST(xXDGAInstallColormapReq);
REQUEST_SIZE_MATCH(xXDGAInstallColormapReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
if (DGA_GETCLIENT(stuff->screen) != client)
return DGAErrorBase + XF86DGADirectNotActivated;
REQUEST_SIZE_MATCH(xXDGAInstallColormapReq);
rc = dixLookupResourceByType((pointer *) &cmap, stuff->cmap, RT_COLORMAP,
client, DixInstallAccess);
if (rc != Success)
@ -399,14 +402,14 @@ ProcXDGASelectInput(ClientPtr client)
{
REQUEST(xXDGASelectInputReq);
REQUEST_SIZE_MATCH(xXDGASelectInputReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
if (DGA_GETCLIENT(stuff->screen) != client)
return DGAErrorBase + XF86DGADirectNotActivated;
REQUEST_SIZE_MATCH(xXDGASelectInputReq);
if (DGA_GETCLIENT(stuff->screen) == client)
DGASelectInput(stuff->screen, client, stuff->mask);
@ -418,14 +421,14 @@ ProcXDGAFillRectangle(ClientPtr client)
{
REQUEST(xXDGAFillRectangleReq);
REQUEST_SIZE_MATCH(xXDGAFillRectangleReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
if (DGA_GETCLIENT(stuff->screen) != client)
return DGAErrorBase + XF86DGADirectNotActivated;
REQUEST_SIZE_MATCH(xXDGAFillRectangleReq);
if (Success != DGAFillRect(stuff->screen, stuff->x, stuff->y,
stuff->width, stuff->height, stuff->color))
return BadMatch;
@ -438,14 +441,14 @@ ProcXDGACopyArea(ClientPtr client)
{
REQUEST(xXDGACopyAreaReq);
REQUEST_SIZE_MATCH(xXDGACopyAreaReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
if (DGA_GETCLIENT(stuff->screen) != client)
return DGAErrorBase + XF86DGADirectNotActivated;
REQUEST_SIZE_MATCH(xXDGACopyAreaReq);
if (Success != DGABlitRect(stuff->screen, stuff->srcx, stuff->srcy,
stuff->width, stuff->height, stuff->dstx,
stuff->dsty))
@ -459,14 +462,14 @@ ProcXDGACopyTransparentArea(ClientPtr client)
{
REQUEST(xXDGACopyTransparentAreaReq);
REQUEST_SIZE_MATCH(xXDGACopyTransparentAreaReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
if (DGA_GETCLIENT(stuff->screen) != client)
return DGAErrorBase + XF86DGADirectNotActivated;
REQUEST_SIZE_MATCH(xXDGACopyTransparentAreaReq);
if (Success != DGABlitTransRect(stuff->screen, stuff->srcx, stuff->srcy,
stuff->width, stuff->height, stuff->dstx,
stuff->dsty, stuff->key))
@ -481,13 +484,14 @@ ProcXDGAGetViewportStatus(ClientPtr client)
REQUEST(xXDGAGetViewportStatusReq);
xXDGAGetViewportStatusReply rep;
REQUEST_SIZE_MATCH(xXDGAGetViewportStatusReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
if (DGA_GETCLIENT(stuff->screen) != client)
return DGAErrorBase + XF86DGADirectNotActivated;
REQUEST_SIZE_MATCH(xXDGAGetViewportStatusReq);
rep.type = X_Reply;
rep.length = 0;
rep.sequenceNumber = client->sequence;
@ -504,13 +508,14 @@ ProcXDGASync(ClientPtr client)
REQUEST(xXDGASyncReq);
xXDGASyncReply rep;
REQUEST_SIZE_MATCH(xXDGASyncReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
if (DGA_GETCLIENT(stuff->screen) != client)
return DGAErrorBase + XF86DGADirectNotActivated;
REQUEST_SIZE_MATCH(xXDGASyncReq);
rep.type = X_Reply;
rep.length = 0;
rep.sequenceNumber = client->sequence;
@ -549,13 +554,14 @@ ProcXDGAChangePixmapMode(ClientPtr client)
xXDGAChangePixmapModeReply rep;
int x, y;
REQUEST_SIZE_MATCH(xXDGAChangePixmapModeReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
if (DGA_GETCLIENT(stuff->screen) != client)
return DGAErrorBase + XF86DGADirectNotActivated;
REQUEST_SIZE_MATCH(xXDGAChangePixmapModeReq);
rep.type = X_Reply;
rep.length = 0;
rep.sequenceNumber = client->sequence;
@ -579,14 +585,14 @@ ProcXDGACreateColormap(ClientPtr client)
REQUEST(xXDGACreateColormapReq);
int result;
REQUEST_SIZE_MATCH(xXDGACreateColormapReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
if (DGA_GETCLIENT(stuff->screen) != client)
return DGAErrorBase + XF86DGADirectNotActivated;
REQUEST_SIZE_MATCH(xXDGACreateColormapReq);
if (!stuff->mode)
return BadValue;
@ -615,10 +621,11 @@ ProcXF86DGAGetVideoLL(ClientPtr client)
int num, offset, flags;
char *name;
REQUEST_SIZE_MATCH(xXF86DGAGetVideoLLReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
REQUEST_SIZE_MATCH(xXF86DGAGetVideoLLReq);
rep.type = X_Reply;
rep.length = 0;
rep.sequenceNumber = client->sequence;
@ -655,9 +662,10 @@ ProcXF86DGADirectVideo(ClientPtr client)
REQUEST(xXF86DGADirectVideoReq);
REQUEST_SIZE_MATCH(xXF86DGADirectVideoReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
REQUEST_SIZE_MATCH(xXF86DGADirectVideoReq);
if (!DGAAvailable(stuff->screen))
return DGAErrorBase + XF86DGANoDirectVideoMode;
@ -713,10 +721,11 @@ ProcXF86DGAGetViewPortSize(ClientPtr client)
REQUEST(xXF86DGAGetViewPortSizeReq);
xXF86DGAGetViewPortSizeReply rep;
REQUEST_SIZE_MATCH(xXF86DGAGetViewPortSizeReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
REQUEST_SIZE_MATCH(xXF86DGAGetViewPortSizeReq);
rep.type = X_Reply;
rep.length = 0;
rep.sequenceNumber = client->sequence;
@ -741,14 +750,14 @@ ProcXF86DGASetViewPort(ClientPtr client)
{
REQUEST(xXF86DGASetViewPortReq);
REQUEST_SIZE_MATCH(xXF86DGASetViewPortReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
if (DGA_GETCLIENT(stuff->screen) != client)
return DGAErrorBase + XF86DGADirectNotActivated;
REQUEST_SIZE_MATCH(xXF86DGASetViewPortReq);
if (!DGAAvailable(stuff->screen))
return DGAErrorBase + XF86DGANoDirectVideoMode;
@ -768,10 +777,11 @@ ProcXF86DGAGetVidPage(ClientPtr client)
REQUEST(xXF86DGAGetVidPageReq);
xXF86DGAGetVidPageReply rep;
REQUEST_SIZE_MATCH(xXF86DGAGetVidPageReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
REQUEST_SIZE_MATCH(xXF86DGAGetVidPageReq);
rep.type = X_Reply;
rep.length = 0;
rep.sequenceNumber = client->sequence;
@ -786,11 +796,11 @@ ProcXF86DGASetVidPage(ClientPtr client)
{
REQUEST(xXF86DGASetVidPageReq);
REQUEST_SIZE_MATCH(xXF86DGASetVidPageReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
REQUEST_SIZE_MATCH(xXF86DGASetVidPageReq);
/* silently fail */
return Success;
@ -804,14 +814,14 @@ ProcXF86DGAInstallColormap(ClientPtr client)
REQUEST(xXF86DGAInstallColormapReq);
REQUEST_SIZE_MATCH(xXF86DGAInstallColormapReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
if (DGA_GETCLIENT(stuff->screen) != client)
return DGAErrorBase + XF86DGADirectNotActivated;
REQUEST_SIZE_MATCH(xXF86DGAInstallColormapReq);
if (!DGAActive(stuff->screen))
return DGAErrorBase + XF86DGADirectNotActivated;
@ -832,10 +842,11 @@ ProcXF86DGAQueryDirectVideo(ClientPtr client)
REQUEST(xXF86DGAQueryDirectVideoReq);
xXF86DGAQueryDirectVideoReply rep;
REQUEST_SIZE_MATCH(xXF86DGAQueryDirectVideoReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
REQUEST_SIZE_MATCH(xXF86DGAQueryDirectVideoReq);
rep.type = X_Reply;
rep.length = 0;
rep.sequenceNumber = client->sequence;
@ -854,14 +865,14 @@ ProcXF86DGAViewPortChanged(ClientPtr client)
REQUEST(xXF86DGAViewPortChangedReq);
xXF86DGAViewPortChangedReply rep;
REQUEST_SIZE_MATCH(xXF86DGAViewPortChangedReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
if (DGA_GETCLIENT(stuff->screen) != client)
return DGAErrorBase + XF86DGADirectNotActivated;
REQUEST_SIZE_MATCH(xXF86DGAViewPortChangedReq);
if (!DGAActive(stuff->screen))
return DGAErrorBase + XF86DGADirectNotActivated;

12
hw/xfree86/dixmods/extmod/xf86vmode.c
View File

@ -1481,14 +1481,14 @@ ProcXF86VidModeGetGammaRamp(ClientPtr client)
REQUEST(xXF86VidModeGetGammaRampReq);
REQUEST_SIZE_MATCH(xXF86VidModeGetGammaRampReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
if (stuff->size != VidModeGetGammaRampSize(stuff->screen))
return BadValue;
REQUEST_SIZE_MATCH(xXF86VidModeGetGammaRampReq);
length = (stuff->size + 1) & ~1;
if (stuff->size) {
@ -1529,11 +1529,11 @@ ProcXF86VidModeGetGammaRampSize(ClientPtr client)
REQUEST(xXF86VidModeGetGammaRampSizeReq);
REQUEST_SIZE_MATCH(xXF86VidModeGetGammaRampSizeReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
REQUEST_SIZE_MATCH(xXF86VidModeGetGammaRampSizeReq);
rep.type = X_Reply;
rep.length = 0;
rep.sequenceNumber = client->sequence;
@ -1555,11 +1555,11 @@ ProcXF86VidModeGetPermissions(ClientPtr client)
REQUEST(xXF86VidModeGetPermissionsReq);
REQUEST_SIZE_MATCH(xXF86VidModeGetPermissionsReq);
if (stuff->screen >= screenInfo.numScreens)
return BadValue;
REQUEST_SIZE_MATCH(xXF86VidModeGetPermissionsReq);
rep.type = X_Reply;
rep.length = 0;
rep.sequenceNumber = client->sequence;