Bug#629611: xserver-xorg: reproducible X server segfault
On Tue, Nov 1, 2011 at 06:08:51 -0500, pacman@kosh.dhis.org wrote:
> I have a few things to update relating to the bug investigation.
>
> In the previous message I wrote:
> > Still no server crashes in any case.
>
> I got another server crash just now. I just wasn't using a big enough image
> yesterday.
>
> >
> > I got a few more clues though, after studying xli expecting to find the cause
> > there, I'm now back to thinking this is a server-side bug.
>
> A bug in the client side of XShm is another possibility to consider. Is there
> any documentation covering the on-the-wire format of MIT-SHM requests? I can
> only find the documentation for using the library.
>
Well if the server crashes then there's at least a server bug. As for
the wire format I don't know if there's more than the protocol headers
from xextproto (x11proto-xext-dev on Debian) and
http://cgit.freedesktop.org/xcb/proto/tree/src/shm.xml
> > And it shows the bug even on Xvfb, so this seems to be a core Xserver bug,
> > not a driver thing.
>
> and now I've seen it on Xephyr too.
>
> > I'll work on replacing the hacked xli with a standalone demo.
>
> Done. Here's the demo program. Complete with Makefile and README!
>
Thanks, I'll try and take a look.
Cheers,
Julien
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