[Bug 16193] New: NULL pointer dereference - radeon_unmap_vram_bos+0x22/0x50

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=16193

           Summary: NULL pointer dereference -
                    radeon_unmap_vram_bos+0x22/0x50
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.35-rc3
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri@kernel-bugs.osdl.org
        ReportedBy: bugz.kernel.tormod@xoxy.net
        Regression: No


I was testing the game Lugaro on M26 (RV410), switching between different
resolutions in the game's options menu. The LCD native 1680x1050 made the game
cursor very slow, so I chose 1400x1050 (have to quit the game and reenter to
take effect). After that I could not go back to 1024x768 (default, works well),
only 1400++ resolutions were listed. Then suddenly X froze, but sysrq-B worked.

I am not sure if this is a recent regression, because it is the first time I
try out different resolutions in this game, and the issue might not be easy to
reproduce as it happened after a series of resolution switching.

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