All tests - BUG kmalloc-512 (Not tainted): Poison overwritten
https://intel-gfx-ci.01.org/tree/drm-tip/IGT_5673/shard-glk9/igt@kms_chamelium@dp-crc-multiple.html
<3> [204.687269] BUG kmalloc-512 (Not tainted): Poison overwritten
<3> [204.687275] -----------------------------------------------------------------------------
<4> [204.687279] Disabling lock debugging due to kernel taint
<3> [204.687282] INFO: 0x000000007e399174-0x000000007e399174 @offset=18984. First byte 0x6a instead of 0x6b
<3> [204.687377] INFO: Allocated in intel_framebuffer_create+0x24/0x70 [i915] age=18164 cpu=0 pid=1060
<3> [204.687385] __slab_alloc.isra.88.constprop.93+0x3d/0x70
<3> [204.687388] kmem_cache_alloc_trace+0x267/0x2d0
<3> [204.687466] intel_framebuffer_create+0x24/0x70 [i915]
<3> [204.687543] intel_user_framebuffer_create+0x161/0x2a0 [i915]
<3> [204.687548] drm_internal_framebuffer_create+0x37f/0x4e0
<3> [204.687551] drm_mode_addfb2+0x30/0xd0
<3> [204.687554] drm_ioctl_kernel+0xb0/0xf0
<3> [204.687556] drm_ioctl+0x305/0x3c0
<3> [204.687560] ksys_ioctl+0x7b/0x90
<3> [204.687563] __x64_sys_ioctl+0x11/0x20
<3> [204.687567] do_syscall_64+0x4f/0x220
<3> [204.687571] entry_SYSCALL_64_after_hwframe+0x49/0xb3
<3> [204.687576] INFO: Freed in __drm_atomic_helper_plane_destroy_state+0x16/0xa0 age=7006 cpu=0 pid=226
<3> [204.687579] __drm_atomic_helper_plane_destroy_state+0x16/0xa0
<3> [204.687656] intel_plane_destroy_state+0x17/0x70 [i915]
<3> [204.687660] drm_atomic_state_default_clear+0x1c2/0x2d0
<3> [204.687736] intel_atomic_state_clear+0x9/0x30 [i915]
<3> [204.687740] __drm_atomic_state_free+0xe/0x50
<3> [204.687816] intel_atomic_cleanup_work+0xa8/0xc0 [i915]
<3> [204.687821] process_one_work+0x268/0x600
<3> [204.687823] worker_thread+0x37/0x380
<3> [204.687826] kthread+0x140/0x160
<3> [204.687829] ret_from_fork+0x24/0x50
<3> [204.687831] INFO: Slab 0x000000009d0effb3 objects=21 used=21 fp=0x00000000027e3b45 flags=0x8000000000010200
<3> [204.687834] INFO: Object 0x000000008396cde5 @offset=18944 fp=0x000000007adfc09a
<3> [204.687837] Redzone 00000000: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................