Bug 20293 - wrong size of alloc memory in XGetDeviceControl
Summary: wrong size of alloc memory in XGetDeviceControl
Status: RESOLVED FIXED
Alias: None
Product: xorg
Classification: Unclassified
Component: Lib/Xi (show other bugs)
Version: git
Hardware: All Linux (All)
: high blocker
Assignee: Xorg Project Team
QA Contact: Xorg Project Team
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Depends on:
Blocks:
 
Reported: 2009-02-24 07:11 UTC by Hyunwoo Park
Modified: 2009-02-24 23:04 UTC (History)
0 users

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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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