Bug 64029

Summary:	evdev crashes if ABS_X/Y is missing from multitouch devices
Product:	xorg	Reporter:	Peter Hutterer <peter.hutterer>
Component:	Input/evdev	Assignee:	Peter Hutterer <peter.hutterer>
Status:	RESOLVED FIXED	QA Contact:	Xorg Project Team <xorg-team>
Severity:	normal
Priority:	medium	CC:	peter.hutterer
Version:	git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Peter Hutterer 2013-04-29 01:39:26 UTC

If a device has ABS_MT_POSITION_X but not ABS_X no valuator class is set up. When the device receives an event later, it crashes.

#0  0x0000000000461d61 in valuator_mask_isset (mask=0x0, valuator=0) at inpututils.c:502
#1  0x00007f49878fead9 in EvdevApplyCalibration (pEvdev=0x1a96e90, mask=0x0) at evdev.c:461
#2  0x00007f49878ff014 in EvdevProcessValuators (pInfo=0x19e4d60) at evdev.c:564
#3  0x00007f49878fff04 in EvdevProcessSyncEvent (pInfo=0x19e4d60, ev=0x7fffa1980f68) at evdev.c:1020
#4  0x00007f498790010b in EvdevProcessEvent (pInfo=0x19e4d60, ev=0x7fffa1980f68) at evdev.c:1066
#5  0x00007f49879003cb in EvdevReadInput (pInfo=0x19e4d60) at evdev.c:1138
#6  0x00000000004ad2be in xf86SigioReadInput (fd=13, closure=0x19e4d60) at xf86Events.c:300
#7  0x00000000004e29c6 in xf86SIGIO (sig=29) at ./../shared/sigio.c:110

Comment 1 Paul Wise 2013-06-26 04:04:16 UTC

The crash is fixed in this commit:

http://cgit.freedesktop.org/xorg/driver/xf86-input-evdev/commit/?id=dea1d1a3906b98b491e9760b3304f881c6afec5e

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