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Bug#956511: linux-image-5.5.0-1-amd64: general protection fault in i915_active_ref with 5.5

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  Bug#956511: linux-image-5.5.0-1-amd64: general protection fault in i915_active_ref with 5.5 Carlos Martín Nieto <cmn@dwim.me> - 2020-04-24 13:40 +0200

#66875 — Bug#956511: linux-image-5.5.0-1-amd64: general protection fault in i915_active_ref with 5.5

Hello maintainer,

I just stumbled across this as I get the same crash. To answer the question you posed the original reported, this happens to me without nvidia drivers loaded (I'm on a Lenovo X1 Carbon Gen 6 so it only has the one graphics card). The card I have reports as VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07).

My log file got cut when I force-restarted, but it looks fundamentally the same as the one you already have.

Apr 24 13:03:35 coalie kernel: [19678.865958] general protection fault: 0000 [#1] SMP PTI
Apr 24 13:03:35 coalie kernel: [19678.865971] CPU: 1 PID: 13817 Comm: slack Not tainted 5.5.0-2-amd64 #1 Debian 5.5.17-1
Apr 24 13:03:35 coalie kernel: [19678.865977] Hardware name: LENOVO 20KHCTO1WW/20KHCTO1WW, BIOS N23ET71W (1.46 ) 02/20/2020
Apr 24 13:03:35 coalie kernel: [19678.866000] RIP: 0010:kmem_cache_alloc+0x73/0x220
Apr 24 13:03:35 coalie kernel: [19678.866009] Code: 99 01 00 00 4d 8b 06 65 49 8b 50 08 65 4c 03 05 d3 bb 9a 68 4d 8b 20 4d 85 e4 0f 84 85 01 00 00 41 8b 46 20 49 8b 3e 4c 01 e0 <48> 8b 18 48 89 c1 49 33 9e 70 01 00 00 4c 89 e0 48 0f c9 48 31 cb
Apr 24 13:03:35 coalie kernel: [19678.866014] RSP: 0018:ffff9c2983dbba28 EFLAGS: 00010282
Apr 24 13:03:35 coalie kernel: [19678.866020] RAX: e61990247f1f8b32 RBX: 0000000000000000 RCX: 0000000000000000
Apr 24 13:03:35 coalie kernel: [19678.866025] RDX: 000000000091d5ee RSI: 0000000000000cc0 RDI: 0000000000031440
Apr 24 13:03:35 coalie kernel: [19678.866029] RBP: 0000000000000cc0 R08: ffff8b507e471440 R09: ffff8b4e77348d90
Apr 24 13:03:35 coalie kernel: [19678.866033] R10: 0000000000000cc0 R11: 0000000000000000 R12: e61990247f1f8b32
Apr 24 13:03:35 coalie kernel: [19678.866037] R13: ffffffffc0711182 R14: ffff8b4d47c239c0 R15: ffff8b4d47c239c0
Apr 24 13:03:35 coalie kernel: [19678.866043] FS:  00007f8f94dddd40(0000) GS:ffff8b507e440000(0000) knlGS:0000000000000000
Apr 24 13:03:35 coalie kernel: [19678.866048] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Apr 24 13:03:35 coalie kernel: [19678.866052] CR2: 00007f00472ea000 CR3: 00000002c8f9e003 CR4: 00000000003606e0
Apr 24 13:03:35 coalie kernel: [19678.866057] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Apr 24 13:03:35 coalie kernel: [19678.866062] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Apr 24 13:03:35 coalie kernel: [19678.866065] Call Trace:
Apr 24 13:03:35 coalie kernel: [19678.866163]  i915_active_ref+0x62/0x180 [i915]
Apr 24 13:03:35 coalie kernel: [19678.866255]  i915_vma_move_to_active+0x24/0x150 [i915]
Apr 24 13:03:35 coalie kernel: [19678.866362]  i915_gem_do_execbuffer+0xd75/0x18f0 [i915]
Apr 24 13:03:35 coalie kernel: [19678.866381]  ? dma_resv_get_fences_rcu+0x366/0x3a0
Apr 24 13:03:35 coalie kernel: [19678.866389]  ? recalibrate_cpu_

Cheers,
   cmn

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