Bug 20293

Summary:	wrong size of alloc memory in XGetDeviceControl
Product:	xorg	Reporter:	Hyunwoo Park <Hyunwoo.Park>
Component:	Lib/Xi	Assignee:	Xorg Project Team <xorg-team>
Status:	RESOLVED FIXED	QA Contact:	Xorg Project Team <xorg-team>
Severity:	blocker
Priority:	high
Version:	git
Hardware:	All
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Hyunwoo Park 2009-02-24 07:11:24 UTC

Hi. :)

I made a program that calls XGetDeviceControl. first, it seems work fine. but after a while, it always crash when I alloc another memory.
after some digging out, I found that XGetDeviceControl screws up the memory allocation table on libc.
XGetDeviceControl in git(https://bugs.freedesktop.org/enter_bug.cgi?product=xorg) at line #122, it allocates memory for xDeviceAbsCalibState(small "x"). but XDeviceAbsCalibState(large "X") is filled on that memory. acturally, the size of the structures are different.
I'm working with DEVICE_ABS_CALIB parameter. but, DEVICE_ABS_AREA, DEVICE_CORE, DEVICE_ENABLE controls seems to be at the same situation.

Regards

Comment 1 Peter Hutterer 2009-02-24 23:04:24 UTC

Fixed with cbdc33d903ec6f90a42ec3c31905eeaef9ecf0a2, thanks for reporting.

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