Bug 109042

https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_159/fi-gdg-551/igt%40kms_ccs%40pipe-a-ccs-on-another-bo.html

<4> [226.571282] ------------[ cut here ]------------
<4> [226.571324] list_del corruption. prev->next should be ffff97430fffe000, but was ffff974300000000
<4> [226.571371] WARNING: CPU: 0 PID: 5 at lib/list_debug.c:53 __list_del_entry_valid+0x79/0x90
<4> [226.571374] Modules linked in: vgem i915 i2c_i801 lpc_ich tg3 prime_numbers
<4> [226.571389] CPU: 0 PID: 5 Comm: kworker/0:0 Tainted: G     U            4.20.0-rc5-gec6b8cacbc87-drmtip_159+ #1
<4> [226.571393] Hardware name: Dell Inc.                 OptiPlex GX280               /0G8310, BIOS A04 02/09/2005
<4> [226.571400] Workqueue: events delayed_fput
<4> [226.571406] RIP: 0010:__list_del_entry_valid+0x79/0x90
<4> [226.571411] Code: 0b 31 c0 c3 48 89 fe 48 c7 c7 48 b2 0a a6 e8 5e 3a be ff 0f 0b 31 c0 c3 48 89 f2 48 89 fe 48 c7 c7 80 b2 0a a6 e8 47 3a be ff <0f> 0b 31 c0 c3 48 c7 c7 c0 b2 0a a6 e8 36 3a be ff 0f 0b 31 c0 c3
<4> [226.571415] RSP: 0018:ffffa15a8002fd50 EFLAGS: 00010286
<4> [226.571420] RAX: 0000000000000000 RBX: ffff97430fffe000 RCX: 0000000000000000
<4> [226.571423] RDX: 0000000000000007 RSI: ffffffffa608808b RDI: 00000000ffffffff
<4> [226.571427] RBP: ffff9743355d3858 R08: 0000000039580a01 R09: 0000000000000000
<4> [226.571430] R10: ffffa15a8002fcd8 R11: 0000000000000000 R12: ffff97430fffdfa8
<4> [226.571434] R13: ffff97430fffe068 R14: ffff9743355d3918 R15: ffff97430fffe068
<4> [226.571438] FS:  0000000000000000(0000) GS:ffff97433e000000(0000) knlGS:0000000000000000
<4> [226.571442] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [226.571446] CR2: 00007f6238c75888 CR3: 000000003549c000 CR4: 00000000000006f0
<4> [226.571450] Call Trace:
<4> [226.571457]  shmem_evict_inode+0xe6/0x1a0
<4> [226.571467]  ? dput+0x20/0x2c0
<4> [226.571473]  evict+0xcb/0x190
<4> [226.571480]  __dentry_kill+0xca/0x190
<4> [226.571487]  dentry_kill+0x4b/0x1b0
<4> [226.571494]  ? dput+0x20/0x2c0
<4> [226.571498]  dput+0x262/0x2c0
<4> [226.571505]  __fput+0xf7/0x1f0
<4> [226.571515]  delayed_fput+0x17/0x30
<4> [226.571521]  process_one_work+0x262/0x630
<4> [226.571535]  worker_thread+0x37/0x380
<4> [226.571543]  ? process_one_work+0x630/0x630
<4> [226.571548]  kthread+0x119/0x130
<4> [226.571553]  ? kthread_park+0x80/0x80
<4> [226.571562]  ret_from_fork+0x3a/0x50
<4> [226.571581] irq event stamp: 2228550
<4> [226.571587] hardirqs last  enabled at (2228549): [<ffffffffa50ffaa9>] console_unlock+0x3f9/0x5f0
<4> [226.571593] hardirqs last disabled at (2228550): [<ffffffffa50019b0>] trace_hardirqs_off_thunk+0x1a/0x1c
<4> [226.571598] softirqs last  enabled at (2228258): [<ffffffffa5c0033a>] __do_softirq+0x33a/0x4b9
<4> [226.571603] softirqs last disabled at (2228115): [<ffffffffa5093009>] irq_exit+0xa9/0xc0
<4> [226.571609] WARNING: CPU: 0 PID: 5 at lib/list_debug.c:53 __list_del_entry_valid+0x79/0x90
<4> [226.571613] ---[ end trace 2a4aea9ab96ebe39 ]---
<6> [227.394322] [IGT] kms_ccs: exiting, ret=77