The CI Bug Log issue associated to this bug has been updated.

### New filters associated

* BDW: igt@gem_ctx_create@basic-files - dmesg-warn - BUG i915_vma (Tainted: .*): Poison overwritten
  - https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7114/fi-bdw-gvtdvm/igt@gem_ctx_create@basic-files.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7115/fi-bdw-gvtdvm/igt@gem_ctx_create@basic-files.html

<3> [70.835825] =============================================================================
<3> [70.841113] BUG i915_vma (Tainted: G     UD W        ): Poison overwritten
<3> [70.841639] -----------------------------------------------------------------------------

<3> [70.849112] INFO: 0x0000000065fccabf-0x0000000065fccabf. First byte 0x6c instead of 0x6b
<3> [70.850059] INFO: Allocated in i915_vma_instance+0xc0/0x920 [i915] age=28723 cpu=0 pid=1027
<3> [70.857115] 	__slab_alloc.isra.84.constprop.89+0x3d/0x70
<3> [70.857652] 	kmem_cache_alloc+0x24a/0x2a0
<3> [70.858169] 	i915_vma_instance+0xc0/0x920 [i915]
<3> [70.858720] 	eb_lookup_vmas+0x7f0/0x1200 [i915]
<3> [70.865164] 	i915_gem_do_execbuffer+0x607/0x2410 [i915]
<3> [70.865750] 	i915_gem_execbuffer2_ioctl+0x11b/0x460 [i915]
<3> [70.866243] 	drm_ioctl_kernel+0xa7/0xf0
<3> [70.866734] 	drm_ioctl+0x2e1/0x390
<3> [70.875090] 	do_vfs_ioctl+0xa0/0x6f0
<3> [70.875549] 	ksys_ioctl+0x35/0x60
<3> [70.876026] 	__x64_sys_ioctl+0x11/0x20
<3> [70.877113] 	do_syscall_64+0x4f/0x210
<3> [70.877562] 	entry_SYSCALL_64_after_hwframe+0x49/0xbe
<3> [70.878132] INFO: Freed in i915_vma_parked+0xb6/0x1e0 [i915] age=26837 cpu=0 pid=12
<3> [70.879024] 	kmem_cache_free+0x31f/0x390
<3> [70.887152] 	i915_vma_parked+0xb6/0x1e0 [i915]
<3> [70.887724] 	pm_notifier+0x12/0x20 [i915]
<3> [70.888224] 	notifier_call_chain+0x34/0x90
<3> [70.888708] 	blocking_notifier_call_chain+0x3f/0x60
<3> [70.897161] 	__gt_park+0x53/0x100 [i915]
<3> [70.897718] 	____intel_wakeref_put_last+0x1c/0x70 [i915]
<3> [70.898209] 	process_one_work+0x26a/0x620
<3> [70.898682] 	worker_thread+0x37/0x380
<3> [70.905115] 	kthread+0x119/0x130
<3> [70.905569] 	ret_from_fork+0x3a/0x50
<3> [70.906054] INFO: Slab 0x00000000f96dca72 objects=12 used=0 fp=0x00000000db470fe4 flags=0x4000000000010200
<3> [70.912391] INFO: Object 0x0000000010776417 @offset=1408 fp=0x00000000e2b48cb9

<3> [70.919092] Redzone 00000000: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
<3> [70.920029] Redzone 00000010: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
<3> [70.927090] Redzone 00000020: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
<3> [70.927984] Redzone 00000030: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
<3> [70.933110] Object 00000000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [70.939098] Object 00000010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [70.939959] Object 00000020: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [70.945108] Object 00000030: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [70.946002] Object 00000040: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [70.955090] Object 00000050: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [70.955961] Object 00000060: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [70.961602] Object 00000070: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [70.964106] Object 00000080: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [70.965011] Object 00000090: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [70.972802] Object 000000a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [70.975089] Object 000000b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [70.975968] Object 000000c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [70.983088] Object 000000d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [70.987089] Object 000000e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [70.987960] Object 000000f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [70.995090] Object 00000100: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [70.995969] Object 00000110: 6b 6b 6b 6b 6b 6b 6b 6b 6c 6b 6b 6b 6b 6b 6b 6b  kkkkkkkklkkkkkkk
<3> [70.999965] Object 00000120: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.007089] Object 00000130: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.007969] Object 00000140: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.013116] Object 00000150: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.014003] Object 00000160: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.016694] Object 00000170: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.023097] Object 00000180: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.023996] Object 00000190: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.029113] Object 000001a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.029971] Object 000001b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.037130] Object 000001c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.040627] Object 000001d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.045113] Object 000001e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.046011] Object 000001f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.055092] Object 00000200: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.055993] Object 00000210: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.060358] Object 00000220: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.063099] Object 00000230: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.063947] Object 00000240: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.071090] Object 00000250: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.071985] Object 00000260: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.079090] Object 00000270: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.079976] Object 00000280: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.085111] Object 00000290: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.088108] Object 000002a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.089006] Object 000002b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.099088] Object 000002c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.100192] Object 000002d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.105113] Object 000002e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.106006] Object 000002f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.109856] Object 00000300: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.110755] Object 00000310: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.119097] Object 00000320: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.119968] Object 00000330: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.127089] Object 00000340: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.127963] Object 00000350: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.133117] Object 00000360: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.134015] Object 00000370: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [71.141021] Object 00000380: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5  kkkkkkkkkkkkkkk.
<3> [71.144106] Redzone 00000000: bb bb bb bb bb bb bb bb                          ........
<3> [71.144980] Padding 00000000: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [71.153115] Padding 00000010: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [71.182106] Padding 00000020: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ

The second read returned the right result. So either somebody flipped a bit then dropped it at the same time as it was dumped, or the read failed. BIT(2). That's been flipped before. Not a bit off-hand I think we are currently flipping around i915_vma -- in the flags that would be the pin_count, which does not or in BIT(2).

Last seen 3 weeks ago, only 4 occurrences so far. Setting medium importance and let's keep watching.

-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/drm/intel/issues/528.