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Bug #3254 <https://bugs.freedesktop.org/show_bug.cgi?id=3254> Make sure

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screensaver & DPMS timeouts don't overflow when multiplied by
    MILLI_PER_MIN. (Reported by Zachary J. Slater)
This commit is contained in:
Alan Coopersmith 2005-10-09 23:47:52 +00:00
parent 29b5f846d2
commit d82aeb55ca
1 changed files with 20 additions and 5 deletions
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25
hw/xfree86/common/xf86Config.c
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@ -1006,25 +1006,40 @@ configServerFlags(XF86ConfFlagsPtr flagsconf, XF86OptionPtr layoutopts)
xf86Info.estimateSizesAggressively = i;
else
xf86Info.estimateSizesAggressively = 0;
/* Make sure that timers don't overflow CARD32's after multiplying */
#define MAX_TIME_IN_MIN (0x7fffffff / MILLI_PER_MIN)
i = -1;
xf86GetOptValInteger(FlagOptions, FLAG_SAVER_BLANKTIME, &i);
if (i >= 0)
if ((i >= 0) && (i < MAX_TIME_IN_MIN))
ScreenSaverTime = defaultScreenSaverTime = i * MILLI_PER_MIN;
else if (i != -1)
xf86ConfigError("BlankTime value %d outside legal range of 0 - %d minutes",
i, MAX_TIME_IN_MIN);
#ifdef DPMSExtension
i = -1;
xf86GetOptValInteger(FlagOptions, FLAG_DPMS_STANDBYTIME, &i);
if (i >= 0)
if ((i >= 0) && (i < MAX_TIME_IN_MIN))
DPMSStandbyTime = defaultDPMSStandbyTime = i * MILLI_PER_MIN;
else if (i != -1)
xf86ConfigError("StandbyTime value %d outside legal range of 0 - %d minutes",
i, MAX_TIME_IN_MIN);
i = -1;
xf86GetOptValInteger(FlagOptions, FLAG_DPMS_SUSPENDTIME, &i);
if (i >= 0)
if ((i >= 0) && (i < MAX_TIME_IN_MIN))
DPMSSuspendTime = defaultDPMSSuspendTime = i * MILLI_PER_MIN;
else if (i != -1)
xf86ConfigError("SuspendTime value %d outside legal range of 0 - %d minutes",
i, MAX_TIME_IN_MIN);
i = -1;
xf86GetOptValInteger(FlagOptions, FLAG_DPMS_OFFTIME, &i);
if (i >= 0)
if ((i >= 0) && (i < MAX_TIME_IN_MIN))
DPMSOffTime = defaultDPMSOffTime = i * MILLI_PER_MIN;
else if (i != -1)
xf86ConfigError("OffTime value %d outside legal range of 0 - %d minutes",
i, MAX_TIME_IN_MIN);
#endif
i = -1;