Xorg crashed with SIGSEGV in dixLookupPrivate()

[Jan David Mol]

Running Jaunty 9.04. I did not actually notice the crash until the bug report dialog popped up.

ProblemType: Crash
Architecture: amd64
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/Xorg
Package: xserver-xorg-core 2:1.5.99.902-0ubuntu6
ProcAttrCurrent: unconfined
ProcCmdline: /usr/bin/X :0 -br -audit 0 -auth /var/lib/gdm/:0.Xauth -nolisten tcp vt7
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
ProcVersion: Linux version 2.6.28-7-generic (buildd@yellow) (gcc version 4.3.3 (Ubuntu 4.3.3-3ubuntu2) ) #20-Ubuntu SMP Mon Feb 9 15:42:34 UTC 2009

Signal: 11
SourcePackage: xorg-server
Stacktrace: #0 0x00000000004346ca in dixLookupPrivate ()
StacktraceTop: dixLookupPrivate ()
ThreadStacktrace:

Title: Xorg crashed with SIGSEGV in dixLookupPrivate()
Uname: Linux 2.6.28-7-generic x86_64
UserGroups:

[lspci]
00:00.0 Host bridge [0600]: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub [8086:2a40] (rev 07)
     Subsystem: Dell Device [1028:024d]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)
     Subsystem: Dell Device [1028:024d]

[Apport retracing service (apport)]

StacktraceTop:dixLookupPrivate (privates=0x198, key=0x7d96e0)

[Bryce Harrington (bryce)]

Hi jjdmol,

Could you please collect a full backtrace from when this crash occurs? Directions on collecting full backtraces are at https://wiki.ubuntu.com/X/Backtracing

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

[Bryce Harrington (bryce)]

The trace shows it's failing in privates.c

#0 0x00000000004346ca in dixLookupPrivate (privates=0x198, key=0x7d96e0)
    at ../../dix/privates.c:79
 ptr = <value optimized out>

However the code in question doesn't make it clear where the failure is:

static _X_INLINE int
privateExists(PrivateRec **privates, const DevPrivateKey key)
{
    return *key && *privates &&
        (*privates)[0].state > *key &&
        (*privates)[*key].state;
}

Guess the next step for this one is to go upstream. Still would be wonderful to get a more detailed backtrace though.

[Tom Jaeger (thjaeger)]

Could be this one:

http://bugs.freedesktop.org/show_bug.cgi?id=19034

[frenet (renet-f)]

I do not think so. I did not remember seeing a second mouse pointer.

F.

On Mon, Mar 30, 2009 at 5:45 AM, Tom Jaeger <email address hidden> wrote:
> Could be this one:
>
> http://bugs.freedesktop.org/show_bug.cgi?id=19034
>
> --
> Xorg crashed with SIGSEGV in dixLookupPrivate()
> https://bugs.launchpad.net/bugs/328937
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “xorg-server” source package in Ubuntu: Triaged
>
> Bug description:
> Running Jaunty 9.04. I did not actually notice the crash until the bug report dialog popped up.
>
> ProblemType: Crash
> Architecture: amd64
> DistroRelease: Ubuntu 9.04
> ExecutablePath: /usr/bin/Xorg
> Package: xserver-xorg-core 2:1.5.99.902-0ubuntu6
> ProcAttrCurrent: unconfined
> ProcCmdline: /usr/bin/X :0 -br -audit 0 -auth /var/lib/gdm/:0.Xauth -nolisten tcp vt7
> ProcEnviron:
>  PATH=(custom, no user)
>  LANG=en_US.UTF-8
> ProcVersion: Linux version 2.6.28-7-generic (buildd@yellow) (gcc version 4.3.3 (Ubuntu 4.3.3-3ubuntu2) ) #20-Ubuntu SMP Mon Feb 9 15:42:34 UTC 2009
>
> Signal: 11
> SourcePackage: xorg-server
> Stacktrace: #0  0x00000000004346ca in dixLookupPrivate ()
> StacktraceTop: dixLookupPrivate ()
> ThreadStacktrace:
>
> Title: Xorg crashed with SIGSEGV in dixLookupPrivate()
> Uname: Linux 2.6.28-7-generic x86_64
> UserGroups:
>
> [lspci]
> 00:00.0 Host bridge [0600]: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub [8086:2a40] (rev 07)
>        Subsystem: Dell Device [1028:024d]
> 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)
>        Subsystem: Dell Device [1028:024d]
>
>

[Tom Jaeger (thjaeger)]

The second cursor doesn't show up anymore since
http://cgit.freedesktop.org/xorg/xserver/commit/?h=server-1.6-branch&id=0d12c44d832b98da10dccc3b8bac7676d8ea2c96,
 but the underlying issue is still there, it's restricted to animated
cursers, though. Were you using any program that uses XInput (gimp,
inkscape, xournal, easystroke...) at the time?

frenet wrote:
> I do not think so. I did not remember seeing a second mouse pointer.
>
> F.
>

[frenet (renet-f)]

KDE was starting. No memory of what was running. But certainly not
gimp, inkscape nor xournal.

F.

On Mon, Mar 30, 2009 at 5:21 PM, Tom Jaeger <email address hidden> wrote:
> The second cursor doesn't show up anymore since
> http://cgit.freedesktop.org/xorg/xserver/commit/?h=server-1.6-branch&id=0d12c44d832b98da10dccc3b8bac7676d8ea2c96,
>  but the underlying issue is still there, it's restricted to animated
> cursers, though.  Were you using any program that uses XInput (gimp,
> inkscape, xournal, easystroke...) at the time?
>
> frenet wrote:
>> I do not think so. I did not remember seeing a second mouse pointer.
>>
>> F.
>>
>
> --
> Xorg crashed with SIGSEGV in dixLookupPrivate()
> https://bugs.launchpad.net/bugs/328937
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “xorg-server” source package in Ubuntu: Triaged
>
> Bug description:
> Running Jaunty 9.04. I did not actually notice the crash until the bug report dialog popped up.
>
> ProblemType: Crash
> Architecture: amd64
> DistroRelease: Ubuntu 9.04
> ExecutablePath: /usr/bin/Xorg
> Package: xserver-xorg-core 2:1.5.99.902-0ubuntu6
> ProcAttrCurrent: unconfined
> ProcCmdline: /usr/bin/X :0 -br -audit 0 -auth /var/lib/gdm/:0.Xauth -nolisten tcp vt7
> ProcEnviron:
>  PATH=(custom, no user)
>  LANG=en_US.UTF-8
> ProcVersion: Linux version 2.6.28-7-generic (buildd@yellow) (gcc version 4.3.3 (Ubuntu 4.3.3-3ubuntu2) ) #20-Ubuntu SMP Mon Feb 9 15:42:34 UTC 2009
>
> Signal: 11
> SourcePackage: xorg-server
> Stacktrace: #0  0x00000000004346ca in dixLookupPrivate ()
> StacktraceTop: dixLookupPrivate ()
> ThreadStacktrace:
>
> Title: Xorg crashed with SIGSEGV in dixLookupPrivate()
> Uname: Linux 2.6.28-7-generic x86_64
> UserGroups:
>
> [lspci]
> 00:00.0 Host bridge [0600]: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub [8086:2a40] (rev 07)
>        Subsystem: Dell Device [1028:024d]
> 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)
>        Subsystem: Dell Device [1028:024d]
>
>

[kseise (kevin-seise)]

I was running a full screen program in Cedega. It crashed and brought me back to the GDM login. Once I logged in, I got the apport crash message. This is a fully up to date Jaunty beta on AMD64

[Jan David Mol (jjdmol)]

Xorg crashed again for me today with a similar but longer traceback. I reported this as bug #357536, since I was unsure of how to extract the proper information without reporting it as a new bug.

[Bryce Harrington (bryce)]

Sure that's fine. We'll just dupe this one to that, since this one's backtrace isn't analyzable.