Message-ID: <20190428095139.GA15857@shao2-debian>
Date:   Sun, 28 Apr 2019 17:51:39 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     Noralf Trønnes <noralf@...nnes.org>
Cc:     Daniel Vetter <daniel.vetter@...ll.ch>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Jani Nikula <jani.nikula@...el.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>, lkp@...org
Subject: [drm/i915/fbdev] 09ded8af57:
 dmesg.RIP:drm_setup_crtcs[drm_kms_helper]

FYI, we noticed the following commit (built with gcc-7):

commit: 09ded8af57bcef7287b8242087d3e7556380de62 ("drm/i915/fbdev: Move intel_fb_initial_config() to fbdev helper")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master

in testcase: plzip
with following parameters:

	nr_threads: 100%
	cpufreq_governor: performance
	ucode: 0x12



on test machine: 144 threads Intel(R) Xeon(R) CPU E7-8890 v3 @ 2.50GHz with 512G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


+-------------------------------------------------+------------+------------+
|                                                 | e33898a207 | 09ded8af57 |
+-------------------------------------------------+------------+------------+
| boot_successes                                  | 14         | 4          |
| boot_failures                                   | 3          |            |
| BUG:kernel_reboot-without-warning_in_test_stage | 3          |            |
| dmesg.RIP:drm_setup_crtcs[drm_kms_helper]       | 0          | 4          |
+-------------------------------------------------+------------+------------+


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@...el.com>


[   35.625371] BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
[   35.634549] #PF error: [normal kernel read fault]
[   35.639800] PGD 0 P4D 0 
[   35.639805] Oops: 0000 [#1] SMP PTI
[   35.646527] CPU: 53 PID: 1179 Comm: systemd-udevd Not tainted 5.1.0-rc2-01104-g09ded8a #1
[   35.655659] Hardware name: Intel Corporation BRICKLAND/BRICKLAND, BIOS BRHSXSD1.86B.0067.R02.1507221722 07/22/2015
[   35.667239] RIP: 0010:drm_setup_crtcs+0x3eb/0x1020 [drm_kms_helper]
[   35.674236] Code: 44 24 60 48 8b 04 24 4c 01 f0 80 38 00 0f 84 a3 07 00 00 41 8b 8d 1c 03 00 00 83 f9 01 0f 84 5f 09 00 00 49 8b 95 e0 03 00 00 <48> 83 7a 10 00 0f 84 e0 01 00 00 48 8b 52 08 48 85 d2 0f 84 d1 01
[   35.695199] RSP: 0000:ffffc9000f9938c0 EFLAGS: 00010297
[   35.701035] RAX: ffff88c083da2198 RBX: ffff88c083da2180 RCX: 0000000000000000
[   35.709000] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88c083da21a1
[   35.716966] RBP: 0000000000000000 R08: ffff88e083ab7d48 R09: 0000000000000000
[   35.724934] R10: 0000000000000000 R11: ffff889fed53ec18 R12: 0000000000000001
[   35.732894] R13: ffff888103a92800 R14: 0000000000000000 R15: 0000000000000001
[   35.740863] FS:  00007fe6402648c0(0000) GS:ffff88dfff640000(0000) knlGS:0000000000000000
[   35.749898] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   35.756312] CR2: 0000000000000010 CR3: 000000807c142003 CR4: 00000000001606e0
[   35.764278] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   35.772235] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   35.780201] Call Trace:
[   35.782946]  __drm_fb_helper_initial_config_and_unlock+0x46/0x540 [drm_kms_helper]
[   35.791404]  mgag200_fbdev_init+0xc6/0xe0 [mgag200]
[   35.796855]  mgag200_modeset_init+0x150/0x1b0 [mgag200]
[   35.802694]  mgag200_driver_load+0x359/0x4d0 [mgag200]
[   35.808470]  drm_dev_register+0x11c/0x1b0 [drm]
[   35.813547]  drm_get_pci_dev+0x9d/0x180 [drm]
[   35.814299] ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[   35.818417]  local_pci_probe+0x42/0x90
[   35.818427]  ? _cond_resched+0x19/0x30
[   35.827168] ata5.00: ATAPI: TEAC    DV-W28S-W, 1.0A, max UDMA/100
[   35.829511]  pci_device_probe+0x141/0x1b0
[   35.829521]  really_probe+0xf8/0x3e0
[   35.835771] ata5.00: configured for UDMA/100
[   35.840505]  driver_probe_device+0x10f/0x120
[   35.840511]  device_driver_attach+0x50/0x60
[   35.847061] scsi 5:0:0:0: CD-ROM            TEAC     DV-W28S-W        1.0A PQ: 0 ANSI: 5
[   35.848979]  __driver_attach+0x9a/0x140
[   35.848983]  ? device_driver_attach+0x60/0x60
[   35.848987]  bus_for_each_dev+0x76/0xc0
[   35.848996]  ? klist_add_tail+0x3b/0x70
[   35.889929]  bus_add_driver+0x141/0x210
[   35.894214]  ? 0xffffffffc078d000
[   35.897914]  driver_register+0x5b/0xe0
[   35.902093]  ? 0xffffffffc078d000
[   35.905805]  do_one_initcall+0x46/0x1e4
[   35.910089]  ? _cond_resched+0x19/0x30
[   35.914279]  ? kmem_cache_alloc_trace+0x3b/0x1d0
[   35.919439]  do_init_module+0x5b/0x210
[   35.923630]  load_module+0x1838/0x1f00
[   35.927822]  ? ima_post_read_file+0xe2/0x120
[   35.932592]  ? __do_sys_finit_module+0xe9/0x110
[   35.937650]  __do_sys_finit_module+0xe9/0x110
[   35.942508]  do_syscall_64+0x5b/0x1a0
[   35.946595]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   35.952226] RIP: 0033:0x7fe63f0e1229
[   35.956210] 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 3f 4c 2b 00 f7 d8 64 89 01 48
[   35.977171] RSP: 002b:00007fff141d8258 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[   35.985624] RAX: ffffffffffffffda RBX: 000055dca71ebe70 RCX: 00007fe63f0e1229
[   35.993580] RDX: 0000000000000000 RSI: 00007fe63f9fa265 RDI: 0000000000000015
[   36.001545] RBP: 00007fe63f9fa265 R08: 0000000000000000 R09: 00007fff141d87d0
[   36.009511] R10: 0000000000000015 R11: 0000000000000246 R12: 0000000000000000
[   36.017477] R13: 000055dca71ff2f0 R14: 0000000000020000 R15: 000055dca5594cbc
[   36.025436] Modules linked in: irqbypass mgag200(+) ttm snd_pcm crct10dif_pclmul crc32_pclmul crc32c_intel snd_timer ipmi_ssif ghash_clmulni_intel drm_kms_helper ahci snd syscopyarea aesni_intel sysfillrect sysimgblt crypto_simd fb_sys_fops libahci soundcore cryptd mpt3sas(+) glue_helper pcspkr drm joydev libata ipmi_si raid_class lpc_ich i2c_i801 scsi_transport_sas ipmi_devintf wmi ipmi_msghandler acpi_pad pcc_cpufreq ip_tables
[   36.067874] CR2: 0000000000000010
[   36.071721] ---[ end trace d29a594eb030ca5d ]---


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Rong Chen


View attachment "config-5.1.0-rc2-01104-g09ded8a" of type "text/plain" (188794 bytes)

View attachment "job-script" of type "text/plain" (7323 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (24500 bytes)

View attachment "job.yaml" of type "text/plain" (4681 bytes)

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