<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [SKL]Webglc sporadically causes system hang" href="https://bugs.freedesktop.org/show_bug.cgi?id=90136#c4">Comment # 4</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [SKL]Webglc sporadically causes system hang" href="https://bugs.freedesktop.org/show_bug.cgi?id=90136">bug 90136</a> from <a class="email" href="mailto:huax.lu@intel.com" title="lu hua <huax.lu@intel.com>"> lu hua</a> <pre>Created <a href="attachment.cgi?id=115283" name="attach_115283" title="dmesg(70614661)">attachment 115283</a> <a href="attachment.cgi?id=115283&action=edit" title="dmesg(70614661)">[details]</a> dmesg(70614661) Test on commit 70614661341ffb26de05e84c6958563b45964223, system hang. Clean boot system, wait 5 minutes or run xinit, system hang. dmesg: [ 175.024940] ------------[ cut here ]------------ [ 175.024984] WARNING: CPU: 1 PID: 5255 at drivers/gpu/drm/drm_mm.c:367 i915_vma_unbind+0x112/0x1bc [i915]() [ 175.024995] Modules linked in: dm_mod ppdev snd_hda_codec_realtek snd_hda_codec_generic pcspkr snd_hda_intel snd_hda_controller snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd soundcore i2c_i801 joydev wmi battery parport_pc parport ac acpi_cpufreq i915 button video drm_kms_helper drm [ 175.025030] CPU: 1 PID: 5255 Comm: X Not tainted 4.0.0_kcloud_706146_20150423+ #364 [ 175.025034] Hardware name: Intel Corporation Skylake Client platform/Skylake Y LPDDR3 RVP3, BIOS SKLSE2R1.86C.B067.R00.1412310711 12/31/2014 [ 175.025038] 0000000000000000 0000000000000009 ffffffff81795a87 0000000000000000 [ 175.025044] ffffffff8103bd5a ffff88009ad86d00 ffffffffa00a166b ffff88009ad86d00 [ 175.025050] ffff8801483c3380 ffff88009ad86d00 0000000000000001 ffff8801442d0000 [ 175.025056] Call Trace: [ 175.025068] [<ffffffff81795a87>] ? dump_stack+0x40/0x50 [ 175.025078] [<ffffffff8103bd5a>] ? warn_slowpath_common+0x98/0xb0 [ 175.025109] [<ffffffffa00a166b>] ? i915_vma_unbind+0x112/0x1bc [i915] [ 175.025137] [<ffffffffa00a166b>] ? i915_vma_unbind+0x112/0x1bc [i915] [ 175.025163] [<ffffffffa00a1740>] ? i915_vma_close+0x2b/0x80 [i915] [ 175.025188] [<ffffffffa00a17fb>] ? i915_gem_close_object+0x66/0x125 [i915] [ 175.025205] [<ffffffffa0003d35>] ? drm_gem_handle_delete+0xaa/0xbd [drm] [ 175.025221] [<ffffffffa00047ae>] ? drm_ioctl+0x322/0x38d [drm] [ 175.025241] [<ffffffffa0003f97>] ? drm_gem_handle_create+0x37/0x37 [drm] [ 175.025248] [<ffffffff8105ede9>] ? set_next_entity+0x32/0x55 [ 175.025257] [<ffffffff8111dcde>] ? do_vfs_ioctl+0x360/0x424 [ 175.025265] [<ffffffff817987d2>] ? __schedule+0x589/0x7c9 [ 175.025271] [<ffffffff8104fad2>] ? task_work_run+0x84/0x96 [ 175.025278] [<ffffffff8111ddeb>] ? SyS_ioctl+0x49/0x7a [ 175.025284] [<ffffffff8179b472>] ? system_call_fastpath+0x12/0x17 [ 175.025288] ---[ end trace eab6accbedda9078 ]--- [ 175.025301] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>