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Fix for CVE-2007-5760 - XFree86 Misc extension out of bounds array index

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This commit is contained in:
Matthieu Herrb
2008-01-17 15:26:41 +01:00
parent e85130c85f
commit bbde5b62a1
1 changed files with 4 additions and 0 deletions
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4
hw/xfree86/common/xf86MiscExt.c
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@@ -548,6 +548,10 @@ MiscExtPassMessage(int scrnIndex, const char *msgtype, const char *msgval,
{ {
ScrnInfoPtr pScr = xf86Screens[scrnIndex]; ScrnInfoPtr pScr = xf86Screens[scrnIndex];
/* should check this in the protocol, but xf86NumScreens isn't exported */
if (scrnIndex >= xf86NumScreens)
return BadValue;
if (*pScr->HandleMessage == NULL) if (*pScr->HandleMessage == NULL)
return BadImplementation; return BadImplementation;
return (*pScr->HandleMessage)(scrnIndex, msgtype, msgval, retstr); return (*pScr->HandleMessage)(scrnIndex, msgtype, msgval, retstr);