[Bug 100518] New: GPU HANG: ecode 7:0:0x86f2fdfd, reason: Hang on render ring, action: reset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100518

            Bug ID: 100518
           Summary: GPU HANG: ecode 7:0:0x86f2fdfd, reason: Hang on render
                    ring, action: reset
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: github at socker.lepus.uberspace.de
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

This error occoured to me while playing around with Vulkan.

kernel: [drm] GPU HANG: ecode 7:0:0x86f2fdfd, in triangle [30010], reason: Hang
on render ring, action: reset
kernel: [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack,
including userspace.
kernel: [drm] Please file a _new_ bug report on bugs.freedesktop.org against
DRI -> DRM/Intel
kernel: [drm] drm/i915 developers can then reassign to the right component if
it's not a kernel issue.
kernel: [drm] The gpu crash dump is required to analyze gpu hangs, so please
always attach it.
kernel: [drm] GPU crash dump saved to /sys/class/drm/card0/error
kernel: drm/i915: Resetting chip after gpu hang
kernel: drm/i915: Resetting chip after gpu hang

After starting my program (triangle), my Xorg hung for several seconds, then
crashed. I saw the above message in my dmesg. Error behaviour differs slightly,
sometimes Xorg crashes, most of the time it hangs completely and I have to
reboot.

The bug is reproducible under the following conditions:
 - create device memory allocation with size=1MiB
 - create a depth-stencil image with dimensions 800x600 and format
VK_FORMAT_D32_SFLOAT_S8_UINT
 - bind the memory allocation (which is obviously too small!) to the DS image
 - draw something and watch it failing

If you really need it, I can attach the crashdump but I would like to avoid
this since I'm not sure whether there is some sensitive data inside the render
ring dump.

The error code sometimes seems to be 7:0:0x85ffffff, but unfortunately I
haven't been able to get a crashdump for this error code, because the machine
locked up and I had to reboot.

CPU is a Core i5-3210M.

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