Bug#428707: xserver-xorg: X randomly crashes after upgrade from 1:7.1.0-18 to 1:7.2-3

[Brice Goglin <Brice.Goglin@ens-lyon.org>]

reassign 428707 xserver-xorg-core
retitle 428707 GLX segfault in xmesa_check_and_update_buffer_size
found 428707 2:1.3.0.0.dfsg-6
thank you



David Johnson wrote:
> After the upgrade from 1:7.1.0-18 to 1:7.2-3 I am experiencing regular X
> crashes. These typically happen when quitting fullscreen applications, or
> when clicking on a link in Firefox.
>
> Backtrace:
> 0: /usr/bin/X(xf86SigHandler+0x6d) [0x4916bd]
> 1: /lib/libc.so.6 [0x2b2af5714ca0]
> 2:
> /usr/lib/xorg/modules/extensions//libGLcore.so(xmesa_check_and_update_buffer_size+0xc)
> [0x2b2b09351b6c]
> 3: /usr/lib/xorg/modules/extensions//libGLcore.so [0x2b2b0935124d]
> 4: /usr/lib/xorg/modules/extensions//libglx.so [0x2b2af69ded1b]
> 5: /usr/bin/X(ResizeChildrenWinSize+0x1bb) [0x43fc5b]
> 6: /usr/bin/X(miSetShape+0xcb) [0x4f4bcb]
> 7: /usr/bin/X [0x4fefa7]
> 8: /usr/bin/X [0x4ff192]
> 9: /usr/bin/X(Dispatch+0x1cb) [0x450dab]
> 10: /usr/bin/X(main+0x45d) [0x439e8d]
> 11: /lib/libc.so.6(__libc_start_main+0xf4) [0x2b2af57018e4]
> 12: /usr/bin/X(FontFileCompleteXLFD+0x229) [0x439189]
>   


This is a crash of the Xserver (hence reassigning ot xserver-xorg-core)
caused by a bug in its built-in mesa (GLcore). It could be related to
the backtrace in comments #34 of upstream bug
https://bugs.freedesktop.org/show_bug.cgi?id=7205
If so, it is already fixed in Mesa git, so we might want to backport the
fix in our Mesa and rebuild the server against it.

Brice