1. 14 7月, 2015 1 次提交
    • C
      drm/i915: Store device pointer in contexts for late tracepoint usafe · 9ea4feec
      Chris Wilson 提交于
      [ 1572.417121] BUG: unable to handle kernel NULL pointer dereference at           (null)
      [ 1572.421010] IP: [<ffffffffa00b2514>] ftrace_raw_event_i915_context+0x5d/0x70 [i915]
      [ 1572.424970] PGD 1766a3067 PUD 1767a2067 PMD 0
      [ 1572.428892] Oops: 0000 [#1] SMP
      [ 1572.432787] Modules linked in: ipv6 dm_mod iTCO_wdt iTCO_vendor_support snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd soundcore serio_raw pcspkr lpc_ich i2c_i801 mfd_core battery ac acpi_cpufreq i915 button video drm_kms_helper drm
      [ 1572.441720] CPU: 2 PID: 18853 Comm: kworker/u8:0 Not tainted 4.0.0_kcloud_3f0360_20150429+ #588
      [ 1572.446298] Workqueue: i915 i915_gem_retire_work_handler [i915]
      [ 1572.450876] task: ffff880002f428f0 ti: ffff880035724000 task.ti: ffff880035724000
      [ 1572.455557] RIP: 0010:[<ffffffffa00b2514>]  [<ffffffffa00b2514>] ftrace_raw_event_i915_context+0x5d/0x70 [i915]
      [ 1572.460423] RSP: 0018:ffff880035727ce8  EFLAGS: 00010286
      [ 1572.465262] RAX: ffff880073f1643c RBX: ffff880002da9058 RCX: ffff880073e5db40
      [ 1572.470179] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff880035727ce8
      [ 1572.475107] RBP: ffff88007bb11a00 R08: 0000000000000000 R09: 0000000000000000
      [ 1572.480034] R10: 0000000000362200 R11: 0000000000000008 R12: 0000000000000000
      [ 1572.484952] R13: ffff880035727d78 R14: ffff880002dc1c98 R15: ffff880002dc1dc8
      [ 1572.489886] FS:  0000000000000000(0000) GS:ffff88017fd00000(0000) knlGS:0000000000000000
      [ 1572.494883] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
      [ 1572.499859] CR2: 0000000000000000 CR3: 000000017572a000 CR4: 00000000001006e0
      [ 1572.504842] Stack:
      [ 1572.509834]  ffff88017b0090c0 ffff880073f16438 ffff880002da9058 ffff880073f1643c
      [ 1572.514904]  0000000000000246 ffff880100000000 ffff88007bb11a00 ffff880002ddeb10
      [ 1572.519985]  ffff8801759f79c0 ffffffffa0092ff0 0000000000000000 ffff88007bb11a00
      [ 1572.525049] Call Trace:
      [ 1572.530093]  [<ffffffffa0092ff0>] ? i915_gem_context_free+0xa8/0xc1 [i915]
      [ 1572.535227]  [<ffffffffa009b969>] ? i915_gem_request_free+0x4e/0x50 [i915]
      [ 1572.540347]  [<ffffffffa00b5533>] ? intel_execlists_retire_requests+0x14c/0x159 [i915]
      [ 1572.545500]  [<ffffffffa009d9ea>] ? i915_gem_retire_requests+0x9d/0xeb [i915]
      [ 1572.550664]  [<ffffffffa009dd8c>] ? i915_gem_retire_work_handler+0x4c/0x61 [i915]
      [ 1572.555825]  [<ffffffff8104ca7f>] ? process_one_work+0x1b2/0x31d
      [ 1572.560951]  [<ffffffff8104d278>] ? worker_thread+0x24d/0x339
      [ 1572.566033]  [<ffffffff8104d02b>] ? cancel_delayed_work_sync+0xa/0xa
      [ 1572.571140]  [<ffffffff81050b25>] ? kthread+0xce/0xd6
      [ 1572.576191]  [<ffffffff81050a57>] ? kthread_create_on_node+0x162/0x162
      [ 1572.581228]  [<ffffffff8179b3c8>] ? ret_from_fork+0x58/0x90
      [ 1572.586259]  [<ffffffff81050a57>] ? kthread_create_on_node+0x162/0x162
      [ 1572.591318] Code: de 48 89 e7 e8 09 4d 00 e1 48 85 c0 74 27 48 89 68 10 48 8b 55 38 48 89 e7 48 89 50 18 48 8b 55 10 48 8b 12 48 8b 12 48 8b 52 38 <8b> 12 89 50 08 e8 95 4d 00 e1 48 83 c4 30 5b 5d 41 5c c3 41 55
      [ 1572.596981] RIP  [<ffffffffa00b2514>] ftrace_raw_event_i915_context+0x5d/0x70 [i915]
      [ 1572.602464]  RSP <ffff880035727ce8>
      [ 1572.607911] CR2: 0000000000000000
      
      Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90112#c23Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
      Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
      9ea4feec
  2. 13 7月, 2015 1 次提交
    • L
      Revert "drm/i915: Use crtc_state->active in primary check_plane func" · 01e2d062
      Linus Torvalds 提交于
      This reverts commit dec4f799.
      
      Jörg Otte reports a NULL pointder dereference due to this commit, as
      'crtc_state' very much can be NULL:
      
              crtc_state = state->base.state ?
                      intel_atomic_get_crtc_state(state->base.state, intel_crtc) : NULL;
      
      So the change to test 'crtc_state->base.active' cannot possibly be
      correct as-is.
      
      There may be some other minimal fix (like just checking crtc_state for
      NULL), but I'm just reverting it now for the rc2 release, and people
      like Daniel Vetter who actually know this code will figure out what the
      right solution is in the longer term.
      Reported-and-bisected-by: NJörg Otte <jrg.otte@gmail.com>
      Cc: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
      Cc: Jani Nikula <jani.nikula@linux.intel.com>
      Cc: Daniel Vetter <daniel.vetter@intel.com>
      CC: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      01e2d062
  3. 09 7月, 2015 17 次提交
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