https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4696/fi-icl-u/igt@drv_selftest@live_requests.html

<3> [433.555990] execlists_submit_ports:434 GEM_BUG_ON(count > !n)
<4> [433.556145] ------------[ cut here ]------------
<2> [433.556148] kernel BUG at drivers/gpu/drm/i915/intel_lrc.c:434!
<4> [433.556157] invalid opcode: 0000 [#1] PREEMPT SMP PTI
<4> [433.556161] CPU: 2 PID: 4611 Comm: drv_selftest Tainted: G     U  W         4.19.0-CI-CI_DRM_5041+ #1
<4> [433.556163] Hardware name: Intel Corporation Ice Lake Client Platform/IceLake U DDR4 SODIMM PD RVP, BIOS ICLSFWR1.R00.2392.A04.1809260455 09/26/2018
<4> [433.556236] RIP: 0010:__execlists_submission_tasklet+0xa72/0xc20 [i915]
<4> [433.556239] Code: 1d c5 8f e0 48 8b 35 4d f9 19 00 49 c7 c0 13 5e 8e a0 b9 b2 01 00 00 48 c7 c2 50 bc 8c a0 48 c7 c7 3d db 7f a0 e8 1e 55 96 e0 <0f> 0b 48 c7 c1 a8 3f 90 a0 ba f3 01 00 00 48 c7 c6 90 bc 8c a0 48
<4> [433.556242] RSP: 0018:ffffc900004078f0 EFLAGS: 00010086
<4> [433.556245] RAX: 000000000000000a RBX: ffff88049e7da5d0 RCX: 0000000000000000
<4> [433.556247] RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff8804ae250aa8
<4> [433.556249] RBP: ffffc90000407950 R08: 00000000005c4a45 R09: ffff8804ae3f3000
<4> [433.556251] R10: 0000000000000000 R11: ffff8804ae250aa8 R12: ffff880494298940
<4> [433.556253] R13: 0000000000000000 R14: ffff88049e7da5d0 R15: ffff88049e7da158
<4> [433.556256] FS:  00007fea8f521980(0000) GS:ffff8804afe80000(0000) knlGS:0000000000000000
<4> [433.556258] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [433.556260] CR2: 00005621baaa78a7 CR3: 00000004aa0ca006 CR4: 0000000000760ee0
<4> [433.556262] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
<4> [433.556264] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
<4> [433.556266] PKRU: 55555554
<4> [433.556267] Call Trace:
<4> [433.556319]  execlists_submit_request+0x181/0x190 [i915]
<4> [433.556366]  submit_notify+0x8d/0x124 [i915]
<4> [433.556406]  __i915_sw_fence_complete+0x81/0x250 [i915]
<4> [433.556451]  i915_request_add+0x36b/0x7e0 [i915]
<4> [433.556493]  live_nop_request+0x10b/0x200 [i915]
<4> [433.556546]  __i915_subtests+0x5e/0xf0 [i915]
<4> [433.556605]  __run_selftests+0x10b/0x190 [i915]
<4> [433.556648]  i915_live_selftests+0x2c/0x60 [i915]
<4> [433.556687]  i915_pci_probe+0x50/0xa0 [i915]
<4> [433.556693]  pci_device_probe+0xa1/0x130
<4> [433.556697]  really_probe+0x25d/0x3c0
<4> [433.556701]  driver_probe_device+0x10a/0x120
<4> [433.556704]  __driver_attach+0xdb/0x100
<4> [433.556707]  ? driver_probe_device+0x120/0x120
<4> [433.556714]  bus_for_each_dev+0x74/0xc0
<4> [433.556718]  bus_add_driver+0x15f/0x250
<4> [433.556720]  ? 0xffffffffa0a06000
<4> [433.556723]  driver_register+0x56/0xe0
<4> [433.556726]  ? 0xffffffffa0a06000
<4> [433.556729]  do_one_initcall+0x58/0x2e0
<4> [433.556732]  ? rcu_lockdep_current_cpu_online+0x8f/0xd0
<4> [433.556735]  ? do_init_module+0x1d/0x1ea
<4> [433.556739]  ? rcu_read_lock_sched_held+0x6f/0x80
<4> [433.556742]  ? kmem_cache_alloc_trace+0x264/0x290
<4> [433.556745]  do_init_module+0x56/0x1ea
<4> [433.556749]  load_module+0x26f5/0x29d0
<4> [433.556755]  ? vfs_read+0x122/0x140
<4> [433.556761]  ? __se_sys_finit_module+0xd3/0xf0
<4> [433.556764]  __se_sys_finit_module+0xd3/0xf0
<4> [433.556769]  do_syscall_64+0x55/0x190
<4> [433.556773]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [433.556776] RIP: 0033:0x7fea8edea839
<4> [433.556779] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 1f f6 2c 00 f7 d8 64 89 01 48
<4> [433.556781] RSP: 002b:00007ffd94ff67d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
<4> [433.556784] RAX: ffffffffffffffda RBX: 0000555d553e4d40 RCX: 00007fea8edea839
<4> [433.556786] RDX: 0000000000000000 RSI: 0000555d553e5b80 RDI: 0000000000000006
<4> [433.556788] RBP: 0000555d553e5b80 R08: 0000000000000004 R09: 0000000000000000
<4> [433.556790] R10: 00007ffd94ff6950 R11: 0000000000000246 R12: 0000000000000000
<4> [433.556792] R13: 0000555d553df3d0 R14: 0000000000000020 R15: 000000000000003c
<4> [433.556796] Modules linked in: i915(+) amdgpu chash gpu_sched ttm vgem snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic x86_pkg_temp_thermal coretemp crct10dif_pclmul crc32_pclmul ax88179_178a usbnet mii ghash_clmulni_intel snd_hda_codec snd_hwdep e1000e snd_hda_core snd_pcm prime_numbers [last unloaded: i915]