Ubuntu
xorg-server package

[RV570] X crashes with SIGSEGV in xf86_reload_cursors() with SWcursor

Bug #371405 reported by Daniel Hermansson on 2009-05-03

This bug affects 4 people

	Status	Importance	Assigned to
xserver-xorg-driver-ati	Fix Released	Medium	freedesktop-bugs #21535
xorg-server (Debian)	Fix Released	Unknown	debbugs #507916
xorg-server (Ubuntu)	Fix Released	High	Unassigned

Bug Description

Binary package hint: xserver-xorg-video-ati

When I enable SWcursor in xorg.conf and reboot, I get to the login screen and enter my user name and password as usual. I once saw my background image, other times it's just black. Then X crashes before I see anything else. I get back to the login screen and can do the whole fun thing again countless times.

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 9.04
Package: xserver-xorg-video-ati 1:6.12.1-0ubuntu2
ProcEnviron:
PATH=(custom, user)
LANG=sv_SE.UTF-8
SHELL=/bin/bash
ProcVersion: Linux version 2.6.28-11-generic (buildd@crested) (gcc version 4.3.3 (Ubuntu 4.3.3-5ubuntu4) ) #42-Ubuntu SMP Fri Apr 17 01:58:03 UTC 2009
SourcePackage: xserver-xorg-video-ati
Uname: Linux 2.6.28-11-generic x86_64

Backtrace:
0: /usr/X11R6/bin/X(xorg_backtrace+0x26) [0x4f1b66]
1: /usr/X11R6/bin/X(xf86SigHandler+0x41) [0x485a61]
2: /lib/libc.so.6 [0x341be33040]
3: /usr/X11R6/bin/X(xf86_reload_cursors+0x45) [0x4afd15]
4: /usr/X11R6/bin/X(xf86CrtcSetModeTransform+0x47d) [0x4ac6dd]
5: /usr/X11R6/bin/X [0x4b5195]
6: /usr/X11R6/bin/X(RRCrtcSet+0x98) [0x51efe8]
7: /usr/X11R6/bin/X(ProcRRSetCrtcConfig+0x62e) [0x51f87e]
8: /usr/X11R6/bin/X(Dispatch+0x364) [0x44e304]
9: /usr/X11R6/bin/X(main+0x3bd) [0x433d8d]
10: /lib/libc.so.6(__libc_start_main+0xe6) [0x341be1e5a6]
11: /usr/X11R6/bin/X [0x433219]
Saw signal 11. Server aborting.

[lspci]
00:00.0 Host bridge [0600]: Intel Corporation 82G33/G31/P35/P31 Express DRAM Controller [8086:29c0] (rev 02)
Subsystem: ASUSTeK Computer Inc. Device [1043:8276]
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc RV570 [Radeon X1950 Pro] [1002:7280] (rev 9a)
Subsystem: PC Partner Limited Device [174b:e190]

See original description

Tags:

Related branches

lp:ubuntu/lucid/xorg-server

lp:ubuntu/natty/xorg-server

Revision history for this message

In freedesktop.org Bugzilla #21535, Bugzilla-allyourba (bugzilla-allyourba) wrote on 2009-05-03:

Created an attachment (id=25406)
Xorg.0.log

Revision history for this message

Daniel Hermansson (daniel.h) wrote on 2009-05-03: X crashes with SIGSEGV with SWcursor

Binary package hint: xserver-xorg-video-ati

When I enable SWcursor in xorg.conf and reboot, I get to the login screen and enter my user name and password as usual. I see my background image, then X crashes before I see anything else. I get back to the login screen and can do the whole fun thing again countless times.

glxinfo:

setxkbmap:

xdpyinfo:

xkbcomp:

Revision history for this message

Daniel Hermansson (daniel.h) wrote on 2009-05-03:

Dependencies.txt Edit (11.0 KiB, text/plain; charset="utf-8")
LsHal.txt Edit (141.1 KiB, text/plain; charset="utf-8")
LsMod.txt Edit (2.5 KiB, text/plain; charset="utf-8")
LsPci.txt Edit (15.8 KiB, text/plain; charset="utf-8")
XorgConf.txt Edit (1.2 KiB, text/plain; charset="utf-8")
XorgLog.txt Edit (56.0 KiB, text/plain; charset="utf-8")
XorgLogOld.txt Edit (45.1 KiB, text/plain; charset="utf-8")
monitors.xml.txt Edit (3.7 KiB, text/plain; charset="utf-8")
system.txt Edit (344 bytes, text/plain; charset="utf-8")

Revision history for this message

Daniel Hermansson (daniel.h) wrote on 2009-05-03:

Xorg.0.log.old Edit (80.8 KiB, text/plain)

Xorg.0.log.old with backtrace

Tormod Volden (tormodvolden) on 2009-05-03

description:	updated
summary:	- X crashes with SIGSEGV with SWcursor + X crashes with SIGSEGV in xf86_reload_cursors() with SWcursor

Revision history for this message

Daniel Hermansson (daniel.h) wrote on 2009-05-03:

:0.log.2 Edit (4.2 KiB, text/plain)

GDM log with backtrace

Tormod Volden (tormodvolden) on 2009-05-03

Changed in xserver-xorg-video-ati (Ubuntu):
status:	New → Confirmed

Revision history for this message

Daniel Hermansson (daniel.h) wrote on 2009-05-04: Re: X crashes with SIGSEGV in xf86_reload_cursors() with SWcursor

gdb-Xorg.txt Edit (18.4 KiB, text/plain)

full backtrace

Daniel Hermansson (daniel.h) on 2009-05-04

description:

updated

Revision history for this message

In freedesktop.org Bugzilla #21535, agd5f (agd5f) wrote on 2009-05-04:

This is an xserver bug. I believe it was fixed in:
7d85169c7ab1d05c21fdbb2877ffd79f344dbb6b

Bug Watch Updater (bug-watch-updater) on 2009-05-04

Changed in xserver-xorg-driver-ati:
status:	Unknown → Confirmed

Revision history for this message

In freedesktop.org Bugzilla #21535, Bugzi09-fdo-tormod (bugzi09-fdo-tormod) wrote on 2009-05-04:

Commit 7d85169c7ab1d05c21fdbb2877ffd79f344dbb6b (from master) does not apply against server-1.6-branch which these guys are using, and I don't think the same typo can be found in the old code anyway. Any chance for a 1.6 fix?

BTW (for understanding the bug triaging practices) why is this bug Notourbug? If it is fixed in xserver it would be Fixed, no?

Revision history for this message

In freedesktop.org Bugzilla #21535, agd5f (agd5f) wrote on 2009-05-04:

(In reply to comment #3)
> Commit 7d85169c7ab1d05c21fdbb2877ffd79f344dbb6b (from master) does not apply
> against server-1.6-branch which these guys are using, and I don't think the
> same typo can be found in the old code anyway. Any chance for a 1.6 fix?
>

It looks like a different issue then.

> BTW (for understanding the bug triaging practices) why is this bug Notourbug?
> If it is fixed in xserver it would be Fixed, no?
>

It's not an xf86-video-ati bug, it's presumably an xserver bug, re-opening as such.

Revision history for this message

In freedesktop.org Bugzilla #21535, agd5f (agd5f) wrote on 2009-05-04:

#10

looks like cursor_screen_priv is NULL. maybe some issue with dixLookupPrivate()? I don't know that code well enough.

Bryce Harrington (bryce) on 2009-05-06

description:

updated

Bryce Harrington (bryce) on 2009-05-13

summary:

- X crashes with SIGSEGV in xf86_reload_cursors() with SWcursor
+ [RV570] X crashes with SIGSEGV in xf86_reload_cursors() with SWcursor

Bryce Harrington (bryce) on 2009-05-15

tags:

added: crash

Bryce Harrington (bryce) on 2009-06-26

summary:

- [RV570] X crashes with SIGSEGV in xf86_reload_cursors() with SWcursor
+ [RV570] [RV570] X crashes with SIGSEGV in xf86_reload_cursors() with
+ SWcursor

Bryce Harrington (bryce) on 2009-06-26

summary:

- [RV570] [RV570] X crashes with SIGSEGV in xf86_reload_cursors() with
- SWcursor
+ [RV570] X crashes with SIGSEGV in xf86_reload_cursors() with SWcursor

Bryce Harrington (bryce) on 2009-08-13

tags:

added: jaunty

Bryce Harrington (bryce) on 2009-08-18

Changed in xserver-xorg-video-ati (Ubuntu):
importance:	Undecided → High
status:	Confirmed → Triaged
affects:	xserver-xorg-video-ati (Ubuntu) → xorg-server (Ubuntu)

Revision history for this message

In freedesktop.org Bugzilla #21535, Jim Paris (jim-jtan) wrote on 2009-11-29:

#11

Created an attachment (id=31555)
Fix crash in xf86_reload_cursors

I ran into the same problem on my system and this patch seems to fix it.

Revision history for this message

Jim Paris (jim-jtan) wrote on 2009-11-29:

#12

fix-swcursor-crash Edit (640 bytes, text/plain)

I ran into the same problem and the attached patch fixes the problem for me

Revision history for this message

In freedesktop.org Bugzilla #21535, Julien Cristau (jcristau) wrote on 2010-03-01:

#13

*** Bug 21275 has been marked as a duplicate of this bug. ***

Revision history for this message

Bryce Harrington (bryce) wrote on 2010-03-12:

#14

The patch is incorrect, it should be:

- if (!cursor_screen_priv->isUp)
+ if (!cursor_screen_priv || !cursor_screen_priv->isUp)

Revision history for this message

Launchpad Janitor (janitor) wrote on 2010-03-12:

#15

This bug was fixed in the package xorg-server - 2:1.7.5-1ubuntu3

---------------
xorg-server (2:1.7.5-1ubuntu3) lucid; urgency=low

  * Add 109_fix-swcursor-crash.patch: Avoid dereferencing null pointer
    while reloading cursors during resume.
    (LP: #371405)
-- Bryce Harrington <email address hidden> Thu, 11 Mar 2010 17:16:12 -0800

Changed in xorg-server (Ubuntu):
status:	Triaged → Fix Released

Bug Watch Updater (bug-watch-updater) on 2010-04-01

Changed in xorg-server (Debian):
status:	Unknown → Confirmed

Revision history for this message

In freedesktop.org Bugzilla #21535, Jürg Billeter (j-bitron) wrote on 2010-04-13:

#16

Created an attachment (id=34977)
Proposed patch

Jim's patch didn't build for me, however, I've attached a very similar patch, which I've been using with X server 1.7 and 1.8 with enabled software cursors for a month now without any issues. Could someone please push this to master?

Bug Watch Updater (bug-watch-updater) on 2010-06-03

Changed in xorg-server (Debian):
status:	Confirmed → Fix Released

Bug Watch Updater (bug-watch-updater) on 2010-09-14

Changed in xserver-xorg-driver-ati:
importance:	Unknown → Medium

Bug Watch Updater (bug-watch-updater) on 2011-01-25

Changed in xserver-xorg-driver-ati:
importance:	Medium → Unknown
status:	Confirmed → Fix Released

Bug Watch Updater (bug-watch-updater) on 2011-02-03

Changed in xserver-xorg-driver-ati:
importance:	Unknown → Medium

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[RV570] X crashes with SIGSEGV in xf86_reload_cursors() with SWcursor

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