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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