[Bug 60852] New: Random memory corruption reported after writing to /sys/module/drm_kms_helper/parameters/edid_firmware

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=60852

            Bug ID: 60852
           Summary: Random memory corruption reported after writing to
                    /sys/module/drm_kms_helper/parameters/edid_firmware
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.11
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - Intel)
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: avillaci at ceibo.fiec.espol.edu.ec
                CC: intel-gfx-bugs at lists.freedesktop.org
        Regression: No

Created attachment 107420
  --> https://bugzilla.kernel.org/attachment.cgi?id=107420&action=edit
dmesg output showing the memory corruption report

Distribution: Fedora 18 x86_64
Kernel Version: 3.11

My machine has a flat panel display that does not report EDID correctly to my
video card. I found the edid_firmware parameter to drm_kms_helper, and I tried
the following line in rc.local:

echo -n edid/1280x1024.bin >
/sys/module/drm_kms_helper/parameters/edid_firmware

Sometimes, nothing bad happens. Other times, I get a memory corruption
backtrace like the one in the attached dmesg report.

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