igt@gem_shrink@reclaim - fail - BUG buffer_head (Not tainted): Redzone overwritten
https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_641/fi-bwr-2160/igt@gem_shrink@reclaim.html
<6> [163.912906] [IGT] gem_shrink: executing
<6> [163.960796] gem_shrink (1140): drop_caches: 4
<3> [164.070881] =============================================================================
<3> [164.071463] BUG buffer_head (Not tainted): Redzone overwritten
<3> [164.071533] -----------------------------------------------------------------------------
<4> [164.071642] Disabling lock debugging due to kernel taint
<3> [164.071646] INFO: 0x00000000413751fd-0x0000000066160c19 @offset=13104. First byte 0x0 instead of 0xcc
<3> [164.071672] INFO: Allocated in alloc_buffer_head+0x18/0x90 age=89360 cpu=1 pid=980
<3> [164.071692] __slab_alloc.isra.86.constprop.94+0x7e/0x90
<3> [164.071705] kmem_cache_alloc+0x709/0x7a0
<3> [164.071716] alloc_buffer_head+0x18/0x90
<3> [164.071726] alloc_page_buffers+0xb4/0x270
<3> [164.071737] __getblk_gfp+0x197/0x360
<3> [164.071748] __breadahead_gfp+0x19/0x60
<3> [164.071759] __ext4_get_inode_loc+0x42b/0x4f0
<3> [164.071771] __ext4_iget+0x10c/0xcc0
<3> [164.071781] ext4_lookup+0xde/0x1d0
<3> [164.071791] __lookup_slow+0x100/0x1d0
<3> [164.071801] walk_component+0x128/0x1a0
<3> [164.071814] path_lookupat+0x63/0x140
<3> [164.071824] filename_lookup+0xb1/0x140
<3> [164.071836] do_faccessat+0x7f/0x260
<3> [164.071848] do_syscall_64+0x33/0x80
<3> [164.071860] entry_SYSCALL_64_after_hwframe+0x44/0xa9
<3> [164.071873] INFO: Slab 0x00000000835aa5d4 objects=32 used=22 fp=0x000000007840f9b0 flags=0x4000000000010201
<3> [164.071894] INFO: Object 0x000000009f7b7305 @offset=13112 fp=0x0000000000000000
<3> [164.071915] Redzone 00000000: 00 00 00 00 00 00 00 00 ........
<3> [164.071933] Object 00000000: 19 00 00 00 00 00 00 00 38 33 33 33 80 88 ff ff ........8333....
<3> [164.071953] Object 00000010: 80 3b b4 00 00 ea ff ff ca 00 20 03 00 00 00 00 .;........ .....
<3> [164.071972] Object 00000020: 00 10 00 00 00 00 00 00 00 e0 0e 2d 80 88 ff ff ...........-....
<3> [164.071992] Object 00000030: 40 f7 41 3d 80 88 ff ff 30 a0 2d 81 ff ff ff ff @.A=....0.-.....
<3> [164.072011] Object 00000040: 00 00 00 00 00 00 00 00 80 33 33 33 80 88 ff ff .........333....
<3> [164.072030] Object 00000050: 80 33 33 33 80 88 ff ff 00 00 00 00 00 00 00 00 .333............
<3> [164.072049] Object 00000060: 00 00 00 00 00 00 00 00 00 00 00 00 ad 4e ad de .............N..
<3> [164.072068] Object 00000070: ff ff ff ff 00 00 00 00 ff ff ff ff ff ff ff ff ................
<3> [164.072088] Object 00000080: a0 3b e0 83 ff ff ff ff 00 00 00 00 00 00 00 00 .;..............
<3> [164.072107] Object 00000090: 00 00 00 00 00 00 00 00 5c 0e 30 82 ff ff ff ff ........\.0.....
<3> [164.072126] Object 000000a0: 00 00 02 00 00 00 00 00 ........
<3> [164.072144] Redzone 00000000: cc cc cc cc cc cc cc cc ........
<3> [164.072163] Padding 00000000: 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZ
<4> [164.072183] CPU: 0 PID: 1140 Comm: gem_shrink Tainted: G B 5.9.0-rc3-gf4cbf17fababf-drmtip_641+ #1
<4> [164.072185] Hardware name: Dell Inc. OptiPlex 745 /0GW726, BIOS 2.3.1 05/21/2007
<4> [164.072187] Call Trace:
<4> [164.072193] dump_stack+0x77/0x9b
<4> [164.072198] check_bytes_and_report+0xe5/0x120
<4> [164.072203] check_object+0x199/0x270
<4> [164.072208] free_debug_processing+0x178/0x490
<4> [164.072211] ? free_buffer_head+0x1c/0x60
<4> [164.072216] ? free_buffer_head+0x1c/0x60
<4> [164.072219] __slab_free+0x24c/0x5a0
<4> [164.072224] ? _raw_spin_unlock_irqrestore+0x42/0x50
<4> [164.072228] ? _raw_spin_unlock_irqrestore+0x2f/0x50
<4> [164.072232] ? debug_check_no_obj_freed+0x121/0x210
<4> [164.072237] ? free_buffer_head+0x1c/0x60
<4> [164.072241] ? kmem_cache_free+0x51d/0x710
<4> [164.072244] kmem_cache_free+0x51d/0x710
<4> [164.072250] free_buffer_head+0x1c/0x60
<4> [164.072253] try_to_free_buffers+0xce/0x1b0
<4> [164.072258] jbd2_journal_try_to_free_buffers+0xd8/0x1a0
<4> [164.072263] ? __remove_mapping+0x144/0x310
<4> [164.072267] invalidate_inode_page+0x93/0xf0
<4> [164.072271] invalidate_mapping_pages+0x17a/0x400
<4> [164.072277] ? __lock_acquire+0x909/0x1f50
<4> [164.072292] drop_pagecache_sb+0xba/0x110
<4> [164.072296] ? do_coredump+0x11b0/0x11b0
<4> [164.072299] iterate_supers+0x87/0xf0
<4> [164.072304] drop_caches_sysctl_handler+0x60/0xa0
<4> [164.072308] proc_sys_call_handler+0xda/0x170
<4> [164.072313] vfs_write+0xd1/0x220
<4> [164.072317] ksys_write+0xa2/0xe0
<4> [164.072322] do_syscall_64+0x33/0x80
<4> [164.072326] entry_SYSCALL_64_after_hwframe+0x44/0xa9
<4> [164.072330] RIP: 0033:0x7f42d5a4b281
<4> [164.072334] Code: c3 0f 1f 84 00 00 00 00 00 48 8b 05 59 8d 20 00 c3 0f 1f 84 00 00 00 00 00 8b 05 8a d1 20 00 85 c0 75 16 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 57 f3 c3 0f 1f 44 00 00 41 54 55 49 89 d4 53
<4> [164.072336] RSP: 002b:00007fff28976ec8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
<4> [164.072339] RAX: ffffffffffffffda RBX: 000000000000000a RCX: 00007f42d5a4b281
<4> [164.072341] RDX: 0000000000000002 RSI: 00007f42d5ee6cc3 RDI: 000000000000000a
<4> [164.072343] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000
<4> [164.072345] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f42d5ee6ca7
<4> [164.072347] R13: 0000000000000009 R14: 00007fff28977000 R15: 0000000000000002
<3> [164.072357] FIX buffer_head: Restoring 0x00000000413751fd-0x0000000066160c19=0xcc
<3> [164.075377] FIX buffer_head: Object at 0x000000009f7b7305 not freed
<6> [164.499007] Console: switching to colour frame buffer device 240x67