[Bug 607071] Re: [SRU] X server segfaults when using XTest (xvfb)
Marc Deslauriers
marc.deslauriers at canonical.com
Mon Dec 6 15:43:46 GMT 2010
SRU request:
Impact: certain uses of XTest cause a null pointer dereference,
rendering xpra unusable in Lucid.
This is fixed in the newer xorg-server version in Maverick. I've
prepared an SRU for lucid that adds the trivial upstream fix that
corrects the issue. See attached debdiff.
** Summary changed:
- X server segfaults when using XTest (xvfb)
+ [SRU] X server segfaults when using XTest (xvfb)
** Patch added: "debdiff for SRU"
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/607071/+attachment/1757470/+files/xorg-server_1.7.6-2ubuntu7.5.debdiff
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https://bugs.launchpad.net/bugs/607071
Title:
[SRU] X server segfaults when using XTest (xvfb)
Status in “parti-all” package in Ubuntu:
Invalid
Status in “xorg-server” package in Ubuntu:
Fix Released
Status in “parti-all” source package in Lucid:
Invalid
Status in “xorg-server” source package in Lucid:
In Progress
Bug description:
There is a bug in at least xorg-server 1.7.6 (as shipped in Lucid) where certain uses of XTest cause a null pointer dereference and the server crashes.
XTest probably isn't used much in general, but this causes very serious problems for 'xpra' -- basically it is unusable in Lucid (at least for me) because the X server keeps crashing under it. I would not be surprised if x11vnc had a similar problem.
(NB, I am the upstream for xpra.)
This bug has been fixed in upstream X.org, and I bisected the fix to this commit:
http://cgit.freedesktop.org/xorg/xserver/commit/?id=af170a4ab76d33254dd4e54a33bb410fa1624739
This bug-fix commit has also been backported to the 1.7 stable tree, and is included in xorg-server 1.7.7:
http://cgit.freedesktop.org/xorg/xserver/commit/?id=ad48184752970541aa153bf2961a2d7da1a910b5
and I have confirmed that xpra works with 1.7.7.
Please upgrade to 1.7.7, or apply this patch to your 1.7.6.
(This has been reported several times as a bug in xpra, see: http://code.google.com/p/partiwm/issues/detail?id=20)
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: xvfb 2:1.7.6-2ubuntu7.2
ProcVersionSignature: Ubuntu 2.6.32-23.37-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-23-generic i686
Architecture: i386
Date: Sun Jul 18 22:22:12 2010
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/usr/bin/zsh
SourcePackage: xorg-server
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