igt@kms_ccs@pipe-a-bad-pixel-format - fail - BUG ext4_allocation_context (Tainted: .* ): Redzone overwritten
https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_463/fi-byt-j1900/igt@kms_ccs@pipe-a-bad-pixel-format.html
<6> [339.401682] Console: switching to colour dummy device 80x25
<6> [339.401978] [IGT] kms_ccs: executing
<3> [339.402606] =============================================================================
<3> [339.402802] BUG ext4_allocation_context (Tainted: G U ): Redzone overwritten
<3> [339.402882] -----------------------------------------------------------------------------
<4> [339.402972] Disabling lock debugging due to kernel taint
<3> [339.402977] INFO: 0x0000000008ca1b91-0x0000000008ca1b91 @offset=3854. First byte 0x9b instead of 0xbb
<3> [339.403004] INFO: Slab 0x000000004e4db3a8 objects=17 used=16 fp=0x000000002146b1d4 flags=0x8000000000010200
<3> [339.403029] INFO: Object 0x00000000875ac19d @offset=3720 fp=0x000000008e8631d9
<3> [339.403054] Redzone 00000000: bb bb bb bb bb bb bb bb ........
<3> [339.403076] Object 00000000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
<3> [339.403098] Object 00000010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
<3> [339.403121] Object 00000020: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
<3> [339.403145] Object 00000030: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
<3> [339.403168] Object 00000040: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
<3> [339.403192] Object 00000050: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
<3> [339.403215] Object 00000060: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
<3> [339.403239] Object 00000070: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkkkkkkkkkk.
<3> [339.403262] Redzone 00000000: bb bb bb bb bb bb 9b bb ........
<3> [339.403284] Padding 00000000: 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZ
<4> [339.403308] CPU: 0 PID: 1087 Comm: kworker/u8:25 Tainted: G BU 5.6.0-rc7-g1934751f0141-drmtip_463+ #1
<4> [339.403311] Hardware name: GIGABYTE GB-BXBT-1900/MZBAYAB-00, BIOS F6 02/17/2015
<4> [339.403318] Workqueue: writeback wb_workfn (flush-8:0)
<4> [339.403323] Call Trace:
<4> [339.403332] dump_stack+0x71/0x9b
<4> [339.403338] check_bytes_and_report+0xed/0x130
<4> [339.403346] check_object+0x1ba/0x260
<4> [339.403353] ? ext4_mb_new_blocks+0x148/0xdb0
<4> [339.403357] alloc_debug_processing+0xf5/0x1c0
<4> [339.403363] ___slab_alloc.constprop.95+0x9d5/0xb20
<4> [339.403370] ? ext4_mb_new_blocks+0x148/0xdb0
<4> [339.403377] ? mark_held_locks+0x49/0x70
<4> [339.403383] ? ext4_mb_new_blocks+0x148/0xdb0
<4> [339.403388] ? __slab_alloc.isra.89.constprop.94+0x3d/0x70
<4> [339.403392] __slab_alloc.isra.89.constprop.94+0x3d/0x70
<4> [339.403397] ? ext4_mb_new_blocks+0x148/0xdb0
<4> [339.403401] kmem_cache_alloc+0x25f/0x2c0
<4> [339.403407] ext4_mb_new_blocks+0x148/0xdb0
<4> [339.403412] ? __kmalloc+0x2f5/0x330
<4> [339.403423] ext4_ext_map_blocks+0xb9e/0xf80
<4> [339.403435] ext4_map_blocks+0x339/0x560
<4> [339.403439] ? kmem_cache_alloc+0x291/0x2c0
<4> [339.403447] ext4_writepages+0xa6c/0x11a0
<4> [339.403466] ? do_writepages+0x46/0xe0
<4> [339.403470] ? ext4_mark_inode_dirty+0x260/0x260
<4> [339.403473] do_writepages+0x46/0xe0
<4> [339.403482] ? __writeback_single_inode+0x4f/0x620
<4> [339.403485] __writeback_single_inode+0x4f/0x620
<4> [339.403491] writeback_sb_inodes+0x253/0x570
<4> [339.403504] wb_writeback+0x113/0x4a0
<4> [339.403514] ? wb_workfn+0xb1/0x5e0
<4> [339.403518] wb_workfn+0xb1/0x5e0
<4> [339.403524] ? process_one_work+0x1d6/0x600
<4> [339.403532] process_one_work+0x260/0x600
<4> [339.403536] ? worker_thread+0xc9/0x380
<4> [339.403544] worker_thread+0x37/0x380
<4> [339.403551] ? process_one_work+0x600/0x600
<4> [339.403554] kthread+0x119/0x130
<4> [339.403558] ? kthread_park+0x80/0x80
<4> [339.403564] ret_from_fork+0x3a/0x50
<3> [339.403576] FIX ext4_allocation_context: Restoring 0x0000000008ca1b91-0x0000000008ca1b91=0xbb
<3> [339.403604] FIX ext4_allocation_context: Marking all objects used