Bug 19472

Summary: segfault with zaphod mode in xserver-1.6-branch and ati driver
Product: xorg Reporter: Matthieu Herrb <matthieu.herrb>
Component: Driver/RadeonAssignee: xf86-video-ati maintainers <xorg-driver-ati>
Status: RESOLVED FIXED QA Contact: Xorg Project Team <xorg-team>
Severity: major    
Priority: medium CC: zerooa
Version: git   
Hardware: x86-64 (AMD64)   
OS: OpenBSD   
i915 platform: i915 features:
Bug Depends on:    
Bug Blocks: 13932    
Description Flags
Xorg.0.log before the crash
patch against 6.12-branch none

Description Matthieu Herrb 2009-01-08 13:18:11 UTC
Created attachment 21813 [details]

Trying zaphod mode in xserver-1.6-branch leads to a segfault. 


Program received signal SIGSEGV, Segmentation fault.
0x000000000042c8d6 in privateExists (privates=0x290, key=0x205dddbcc)
    at /local/xorg/xserver/dix/privates.c:79
79          return *key && *privates &&
(gdb) bt
#0  0x000000000042c8d6 in privateExists (privates=0x290, key=0x205dddbcc)
    at /local/xorg/xserver/dix/privates.c:79
#1  0x000000000042c3c3 in dixLookupPrivate (privates=0x290, key=0x205dddbcc)
    at /local/xorg/xserver/dix/privates.c:162
#2  0x00000002059a0e37 in XAAStateWrapSync (pScrn=0x206c0f000)
    at /local/xorg/xserver/hw/xfree86/xaa/xaaStateChange.c:323
#3  0x00000002092f7d08 in radeon_crtc_lock ()
   from /usr/X11R6/lib/modules/drivers/radeon_drv.so
#4  0x00000000004c894e in xf86CrtcSetModeTransform (crtc=0x20657a800, 
    mode=0x20657a8e8, rotation=1, transform=0x0, x=0, y=0)
    at /local/xorg/xserver/hw/xfree86/modes/xf86Crtc.c:273
#5  0x00000000004cd711 in xf86SetDesiredModes (scrn=0x206c0f000)
    at /local/xorg/xserver/hw/xfree86/modes/xf86Crtc.c:2452
#6  0x00000002092d9b93 in RADEONScreenInit ()
   from /usr/X11R6/lib/modules/drivers/radeon_drv.so
#7  0x000000000042bed7 in AddScreen (pfnInit=0x2092d9360 <RADEONScreenInit>, 
    argc=3, argv=0x7f7ffffecff8) at /local/xorg/xserver/dix/main.c:688
#8  0x000000000047c2a5 in InitOutput (pScreenInfo=0xa51440, argc=3, 
    at /local/xorg/xserver/hw/xfree86/common/xf86Init.c:1250
#9  0x000000000042b005 in main (argc=3, argv=0x7f7ffffecff8, 
    envp=0x7f7ffffed018) at /local/xorg/xserver/dix/main.c:309
Comment 1 Matthieu Herrb 2009-01-08 13:24:18 UTC
Created attachment 21814 [details]
Xorg.0.log before the crash
Comment 2 Keith Packard 2009-01-12 10:47:57 UTC
This looks like a Radeon driver bug where pScrn->pScreen is NULL in Zaphod mode.
Comment 3 Matthieu Herrb 2009-06-18 13:44:58 UTC
Created attachment 26931 [details] [review]
patch against 6.12-branch

Yes, that was it. Attached patch against 6.12 branch fixes it.
Comment 4 Alex Deucher 2009-09-25 14:13:11 UTC
fixed in: 718a611f3cc7f5eea95cd73a9dcc7913c922fcbc

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