[Bug 81159] New: [PNV/SNB/HSW/BYT Bisected]igt/gem_render_copy_redux cause core dumped

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81159

          Priority: high
            Bug ID: 81159
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [PNV/SNB/HSW/BYT Bisected]igt/gem_render_copy_redux
                    cause core dumped
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jinxianx.guo at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 102523
  --> https://bugs.freedesktop.org/attachment.cgi?id=102523&action=edit
dmesg

==System Environment==
--------------------------
Regression: Yes. 
Please check the bisect result below.

Non-working platforms: PNV SNB HSW BYT

==kernel==
--------------------------
origin/drm-intel-nightly: 16025dad8e9964a5810385f755d43f1c48d6fdcc(fails)
    drm-intel-nightly: 2014y-07m-09d-14h-17m-14s integration manifest
origin/drm-intel-next-queued: d101c8fe9bda6578ae72d6021415cfaad2b422f0(fails)
    drm/i915: remove i915_rstdby_delays debugfs entry
origin/drm-intel-fixes: 01527b3127997ef6370d5ad4fa25d96847fbf12a(works)
    drm/i915/vlv: T12 eDP panel timing enforcement during reboot

==Bug detailed description==
igt/gem_render_copy_redux cause core dumped

Output:
[root at x-hsw24 tests]# ./gem_render_copy_redux
IGT-Version: 1.7-g8d60b82 (x86_64) (Linux:
3.16.0-rc4_drm-intel-nightly_16025d_20140710+ x86_64)
Subtest normal: SUCCESS
Subtest interruptible: SUCCESS
Segmentation fault (core dumped)

==Reproduce steps==
---------------------------- 
1. ./gem_render_copy_redux


==Bisect results==
----------------------------
commit 6d6dfcfb883818b40b58bac61cc72cab428a7a03
Author:     David Herrmann <dh.herrmann at gmail.com>
AuthorDate: Sun Mar 16 14:38:40 2014 +0100
Commit:     David Herrmann <dh.herrmann at gmail.com>
CommitDate: Tue Jul 8 00:34:02 2014 +0200

    drm: enable render-nodes by default

    We introduced render-nodes about 1/2 year ago and no problems showed up.
    Remove the drm_rnodes argument and enable them by default now.

    Acked-by: Daniel Vetter <daniel.vetter at ffwll.ch>
    Acked-by: Alex Deucher <alexander.deucher at amd.com>
    Signed-off-by: David Herrmann <dh.herrmann at gmail.com>

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