Ubuntu
xserver-xorg-video-savage package

segfault in SavageSwitchMode when ppracer switches mode

Bug #136824 reported by Tormod Volden
2
Affects Status Importance Assigned to Milestone
X.Org X server
Fix Released
Medium
xserver-xorg-video-savage (Ubuntu)
Fix Released
Medium
Kees Cook

Bug Description

Binary package hint: xserver-xorg-video-savage

My laptop screen resolution is 1024x768. If I start ppracer with no configuration file, it will use 800x600 in fullscreen, and this makes the X server crash. If I set 1024x800 in .ppracer/options it works fine. If I change resolution with "xrandr 800x600" before starting ppracer it also works fine.

Backtrace:
0: /usr/bin/Xorg(xf86SigHandler+0x81) [0x80c76f1]
1: [0xffffe420]
2: /usr/lib/xorg/modules/drivers//savage_drv.so(SavageSwitchMode+0xa0) [0xb7baf620]
3: /usr/bin/Xorg [0x81005a3]
4: /usr/bin/Xorg [0x80da563]
5: /usr/bin/Xorg(xf86SwitchMode+0xce) [0x80e531e]
6: /usr/bin/Xorg(VidModeSwitchMode+0x6d) [0x80d5f9d]
7: /usr/lib/xorg/modules/extensions//libextmod.so [0xb7c4459a]
8: /usr/bin/Xorg [0x815768e]
9: /usr/bin/Xorg(Dispatch+0x1aa) [0x808f49a]
10: /usr/bin/Xorg(main+0x495) [0x8076f25]

See original description
Revision history for this message
In , Bugzi09-fdo-tormod (bugzi09-fdo-tormod) wrote :

Created an attachment (id=11392)
gdb session after crash

Revision history for this message
Tormod Volden (tormodvolden) wrote :

Binary package hint: xserver-xorg-video-savage

My laptop screen resolution is 1024x768. If I start ppracer with no config file, it will use 800x600 in fullscreen, and this makes the X server crash. If I set 1024x800 in .ppracer/config it works fine. If I change resolution with "xrandr 800x600" before starting ppracer it also works fine.

Backtrace:
0: /usr/bin/Xorg(xf86SigHandler+0x81) [0x80c76f1]
1: [0xffffe420]
2: /usr/lib/xorg/modules/drivers//savage_drv.so(SavageSwitchMode+0xa0) [0xb7baf620]
3: /usr/bin/Xorg [0x81005a3]
4: /usr/bin/Xorg [0x80da563]
5: /usr/bin/Xorg(xf86SwitchMode+0xce) [0x80e531e]
6: /usr/bin/Xorg(VidModeSwitchMode+0x6d) [0x80d5f9d]
7: /usr/lib/xorg/modules/extensions//libextmod.so [0xb7c4459a]
8: /usr/bin/Xorg [0x815768e]
9: /usr/bin/Xorg(Dispatch+0x1aa) [0x808f49a]
10: /usr/bin/Xorg(main+0x495) [0x8076f25]

Revision history for this message
Tormod Volden (tormodvolden) wrote :
Tormod Volden (tormodvolden)
description: updated
Bug Watch Updater (bug-watch-updater)
Changed in xorg-server:
status: Unknown → Confirmed
Revision history for this message
In , Brice Goglin (brice-goglin) wrote :

Same problem has been reported with Savage driver 2.1.3 in http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=440839

"When I start dosemu in fullscreen mode X crashes. It does not happen on
other graphics hardware or when I disable the fullscreen feature."

Revision history for this message
In , agd5f (agd5f) wrote :

This should be fixed in commit: 846a69f70d189c486448df269a512b8d42fab0c2

Bug Watch Updater (bug-watch-updater)
Changed in xorg-server:
status: Confirmed → Fix Released
Revision history for this message
In , Bugzi09-fdo-tormod (bugzi09-fdo-tormod) wrote :

Thanks! That solved the problem.

Revision history for this message
Tormod Volden (tormodvolden) wrote :

I made a debdiff with the upstream fix:

  * upstream commit 846a69f70d189c486448df269a512b8d42fab0c2
    Fixes crash when switching modes (LP: #136824)

Revision history for this message
Bryce Harrington (bryce) wrote :

The debdiff looks safe enough to me. +1 for uploading it for Gutsy.

Changed in xserver-xorg-video-savage:
importance: Undecided → Medium
status: New → Triaged
Revision history for this message
Kees Cook (kees) wrote :

Thanks! Building now.

Changed in xserver-xorg-video-savage:
assignee: nobody → keescook
status: Triaged → Fix Committed
Revision history for this message
Tormod Volden (tormodvolden) wrote :

Alternative debdiff, using quilt for the patch.

Revision history for this message
Tormod Volden (tormodvolden) wrote :

xserver-xorg-video-savage (1:2.1.2-6ubuntu1) gutsy; urgency=low

  * debian/patches/01_panning-check-mode.patch: From upstream commit
    846a69f70d189c486448df269a512b8d42fab0c2. Fixes crash when switching
    modes (LP: #136824)

 -- Tormod Volden <email address hidden> Tue, 18 Sep 2007 00:20:58 +0200

Changed in xserver-xorg-video-savage:
status: Fix Committed → Fix Released
Bug Watch Updater (bug-watch-updater)
Changed in xorg-server:
importance: Unknown → Medium
Bug Watch Updater (bug-watch-updater)
Changed in xorg-server:
importance: Medium → Unknown
Bug Watch Updater (bug-watch-updater)
Changed in xorg-server:
importance: Unknown → Medium
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