v4.20-rc1: list_del corruption on thinkpad x220

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Hi!

My machine locked hard (thinkpad x220). After reboot, I found this in
syslog:

Sounds like memory corruption..? Does not sound like easy to debug.

...otoh, it still looks like an addres, so maybe it is "just" race in
GPU drivers?

Any ideas?
								Pavel

Nov  8 18:35:01 duo CRON[28511]: (root) CMD (command -v debian-sa1 >
/dev/null && debian-sa
1 1 1)
Nov  8 18:42:57 duo kernel: list_del corruption. prev->next should be
ffff8801742b8178, but
 was ffffc9000192fec8
 Nov  8 18:42:57 duo kernel: ------------[ cut here ]------------
 Nov  8 18:42:57 duo kernel: kernel BUG at
 /data/fast/l/k/lib/list_debug.c:53!
 Nov  8 18:42:57 duo kernel: invalid opcode: 0000 [#1] SMP PTI
 Nov  8 18:42:57 duo kernel: CPU: 2 PID: 1082 Comm: i915/signal:1 Not
 tainted 4.20.0-rc1+ #3
 Nov  8 18:42:57 duo kernel: Hardware name: LENOVO 42872WU/42872WU,
 BIOS 8DET74WW (1.44 ) 03
 /13/2018
 Nov  8 18:42:57 duo kernel: RIP:
 0010:__list_del_entry_valid+0x8e/0x90
 Nov  8 18:42:57 duo kernel: Code: 66 88 d1 ff 0f 0b 48 89 fe 31 c0 48
 c7 c7 90 74 5e 85 e8
 53 88 d1 ff 0f 0b 48 89 fe 31 c0 48 c7 c7 c8 74 5e 85 e8 40 88 d1 ff
 <0f> 0b 55 48 89 d0 48
  8b 52 08 48 89 e5 48 39 f2 75 19 48 8b 32 48
  Nov  8 18:42:57 duo kernel: RSP: 0000:ffffc9000196be78 EFLAGS:
  00210086
  Nov  8 18:42:57 duo kernel: RAX: 0000000000000054 RBX:
  ffff8801742b8178 RCX: 00000000000000
  00
  Nov  8 18:42:57 duo kernel: RDX: 0000000000000000 RSI:
  ffff88019e2a53d8 RDI: ffff88019e2a53
  d8
  Nov  8 18:42:57 duo kernel: RBP: ffffc9000196be78 R08:
  ffff880196e2cd10 R09: 00000000000000
  00
  Nov  8 18:42:57 duo kernel: R10: 00000000e7684eb9 R11:
  3863656632393101 R12: ffffc9000196be
  c8
  Nov  8 18:42:57 duo kernel: R13: ffff88019707e000 R14:
  ffff8801742b8080 R15: ffffc9000192fd
  d0
  Nov  8 18:42:57 duo kernel: FS:  0000000000000000(0000)
  GS:ffff88019e280000(0000) knlGS:000
  0000000000000
  Nov  8 18:42:57 duo kernel: CS:  0010 DS: 0000 ES: 0000 CR0:
  0000000080050033
  Nov  8 18:42:57 duo kernel: CR2: 00000000ed2bf000 CR3:
  000000000581e001 CR4: 00000000000606a0
  Nov  8 18:42:57 duo kernel: Call Trace:
  Nov  8 18:42:57 duo kernel: intel_breadcrumbs_signaler+0x162/0x330
  Nov  8 18:42:57 duo kernel: kthread+0x116/0x150
  Nov  8 18:42:57 duo kernel: ? intel_engine_wakeup+0x40/0x40
  Nov  8 18:42:57 duo kernel: ? kthread_park+0x90/0x90
  Nov  8 18:42:57 duo kernel: ret_from_fork+0x35/0x40
  Nov  8 18:42:57 duo kernel: Modules linked in:
  Nov  8 18:42:57 duo kernel: ---[ end trace 2f8da183a56f80f6 ]---
  Nov  8 18:42:57 duo kernel: RIP:
  0010:__list_del_entry_valid+0x8e/0x90
  Nov  8 18:42:57 duo kernel: Code: 66 88 d1 ff 0f 0b 48 89 fe 31 c0
  48 c7 c7 90 74 5e 85 e8 53 88 d1 ff 0f 0b 48 89 fe 31 c0 48 c7 c7 c8
  74 5e 85 e8 40 88 d1 ff <0f> 0b 55 48 89 d0 48 8b 52 08 48 89 e5 48
  39 f2 75 19 48 8b 32 48
  Nov  8 18:42:57 duo kernel: RSP: 0000:ffffc9000196be78 EFLAGS:
  00210086
  Nov  8 18:42:57 duo kernel: RAX: 0000000000000054 RBX:
  ffff8801742b8178 RCX: 0000000000000000
  Nov  8 18:42:57 duo kernel: RDX: 0000000000000000 RSI:
  ffff88019e2a53d8 RDI: ffff88019e2a53d8
  Nov  8 18:42:57 duo kernel: RBP: ffffc9000196be78 R08:
  ffff880196e2cd10 R09: 0000000000000000
  Nov  8 18:42:57 duo kernel: R10: 00000000e7684eb9 R11:
  3863656632393101 R12: ffffc9000196bec8
  Nov  8 18:42:57 duo kernel: R13: ffff88019707e000 R14:
  ffff8801742b8080 R15: ffffc9000192fdd0
  Nov  8 18:42:57 duo kernel: FS:  0000000000000000(0000)
  GS:ffff88019e280000(0000) knlGS:0000000000000000
  Nov  8 18:42:57 duo kernel: CS:  0010 DS: 0000 ES: 0000 CR0:
  0000000080050033
  Nov  8 18:42:57 duo kernel: CR2: 00000000ed2bf000 CR3:
  000000000581e001 CR4: 00000000000606a0

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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