Thanks, I think you're correct that it's failing here:
Line 404 in xkbEvents.c
would be:
xkbi = kbd->key->xkbInfo;
The kbd pointer is defined, so presumably the likely way this would
segfault is if kbd->key were undefined. Perhaps there should be a check
on that.
** Summary changed:
- Xorg crashes with a segfault if pressing "Del" key
+ Xorg segfaults in XkbHandleBell() if pressing "Del" key
** Description changed:
- Binary package hint: xorg
+ [Problem]
+ Xorg crashes in XkbHandleBell() when DEL key pressed, in various
applications.
+
+ [Backtrace]
+ #0 XkbHandleBell (force=0 '\0', eventOnly=0 '\0', kbd=0x8273490, percent=50
'2', pCtrl=0x8273cc8, class=0 '\0', name=0, pWin=0x0, pClient=0x8262fd8)
+ at ../../xkb/xkbEvents.c:404
+ bn = {type = 111 'o', xkbType = 8 '\b', sequenceNumber = 280, time =
504481, deviceID = 0 '\0', bellClass = 0 '\0', bellID = 0 '\0',
+ percent = 50 '2', pitch = 400, duration = 100, name = 0, window = 0,
eventOnly = 0 '\0', pad1 = 58 ':', pad2 = 2167, pad3 = 4120}
+ initialized = <value optimized out>
+ xkbi = <value optimized out>
+ interest = <value optimized out>
+ id = <value optimized out>
+ pitch = <value optimized out>
+ duration = <value optimized out>
+ time = <value optimized out>
+ winID = <value optimized out>
+ #1 0x0808386c in ProcBell (client=0x8262fd8) at ../../dix/devices.c:1859
+ keybd = (DeviceIntPtr) 0x8273490
+ base = <value optimized out>
+ newpercent = 0
+ #2 0x0815076e in XaceCatchDispatchProc (client=0x8262fd8) at
../../Xext/xace.c:281
+ major = 104
+ #3 0x0808d8df in Dispatch () at ../../dix/dispatch.c:502
+ result = <value optimized out>
+ client = (ClientPtr) 0x8262fd8
+ nready = 0
+ start_tick = 2680
+ #4 0x0807471b in main (argc=3, argv=0xbfeb0fd4, envp=Cannot access memory at
address 0x8
+ ) at ../../dix/main.c:452
+ i = 1
+ error = 136163204
+ xauthfile = <value optimized out>
+ alwaysCheckForInput = {0, 1}
+ [Original Report]
I get crashes of the Xorg server if I press the "Del" key. This happened
three times recently and seems to be repeatable. The system is an up-to-date
Kubuntu 8.04.
The dmesg says:
[ 754.699253] Xorg[5444]: segfault at 000001a4 eip 0818fa3a esp bfa98800
error 4
[ 866.241862] Xorg[9589]: segfault at 000001a4 eip 0818fa3a esp bfd02030
error 4
[ 1039.389615] Xorg[10174]: segfault at 000001a4 eip 0818fa3a esp bfd978d0
error 4
The first two crashes happened with a Java program while saving a file. I
placed the cursor in the middle of the default filename and pressed the "Del"
key. As here were no more characters to delete left, Xorg crashed.
The third crash happened with Seamonkey while editing the Ubuntu bug report
search query.
Note: Special on my system is, that I have a Wacom Bamboo connected.
My xorg.conf will follow.
** Changed in: xorg-server (Ubuntu)
Assignee: (unassigned) => Bryce Harrington (bryceharrington)
--
Xorg segfaults in XkbHandleBell() if pressing "Del" key
https://bugs.launchpad.net/bugs/231484
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