Greeting,

FYI, we noticed the following commit (built with gcc-9):

commit: bac9c29482248b00cccfdfef1f34175714d33370 ("drm/edid: Break out reading block 0 of the EDID")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master


in testcase: fio-basic
version: fio-x86_64-3.15-1_20210828
with following parameters:

	runtime: 300s
	disk: 1HDD
	fs: btrfs
	nr_task: 100%
	test_size: 128G
	rw: write
	bs: 4k
	ioengine: filecreate
	cpufreq_governor: performance
	ucode: 0x42e

test-description: Fio is a tool that will spawn a number of threads or processes doing a particular type of I/O action as specified by the user.
test-url: https://github.com/axboe/fio


on test machine: 48 threads 2 sockets Intel(R) Xeon(R) CPU E5-2697 v2 @ 2.70GHz with 112G memory

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



If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@intel.com>


39mKernel Config[   14.138938][  T304] ata6: SATA max UDMA/133 abar m2048@0xd0b00000 port 0xd0b00380 irq 61
[[   14.198770][  T635] ipmi_si dmi-ipmi-si.0: IPMI kcs interface initialized
[   14.332374][    T5] #PF: supervisor read access in kernel mode
[   14.338904][    T5] #PF: error_code(0x0000) - not-present page
[   14.345414][    T5] PGD 0 P4D 0 
[   14.349018][    T5] Oops: 0000 [#1] SMP PTI
r to synchronize[   14.353687][    T5] CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.15.0-rc1-00114-gbac9c2948224 #1
[   14.365136][    T5] Hardware name: Intel Corporation S2600WP/S2600WP, BIOS SE5C600.86B.02.02.0002.122320131210 12/23/2013
 boot up for ifu[   14.377368][    T5] Workqueue: events work_for_cpu_fn
[   14.384541][    T5] RIP: 0010:connector_bad_edid+0x12/0x180 [drm]
[   14.391370][    T5] Code: 0f 1f 84 00 00 00 00 00 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 0f 1f 44 00 00 41 54 55 89 d5 53 48 89 f3 48 83 ec 20 <0f> b6 56 7e 65 48 8b 04 25 28 00 00 00 48 89 44 24 18 31 c0 c1 e2
[   14.414456][    T5] RSP: 0018:ffffc90000093b58 EFLAGS: 00010282
[   14.421077][    T5] RAX: ffff888172c5df01 RBX: ffffffffffffffea RCX: 00000000000003f9
[   14.429823][    T5] RDX: 0000000000000001 RSI: ffffffffffffffea RDI: ffff8881e02b6668
[   14.438567][    T5] RBP: 0000000000000001 R08: 00000a77fb35e0ea R09: 0000000000000000
[   14.447321][    T5] R10: 00000000000000e9 R11: 00000000000191e4 R12: ffffffffc03b5d80
[   14.456060][    T5] R13: ffff8881e02bf800 R14: 0000000000000000 R15: ffffffffffffffea
         Startin[   14.464807][    T5] FS:  0000000000000000(0000) GS:ffff888f03600000(0000) knlGS:0000000000000000
[   14.476158][    T5] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 Journal to Pers[   14.476160][    T5] CR2: 0000000000000068 CR3: 00000002adcbe002 CR4: 00000000001706f0
[   14.476167][    T5]  ? drm_hdmi_avi_infoframe_bars+0x40/0x40 [drm]
0m...
[   14.476180][    T5]  ? drm_hdmi_avi_infoframe_bars+0x40/0x40 [drm]
[   14.476190][    T5]  drm_do_get_edid+0xf4/0x300 [drm]
[   14.491802][  T738] ata6: SATA link down (SStatus 0 SControl 300)


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        sudo bin/lkp install job.yaml           # job file is attached in this email
        bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
        sudo bin/lkp run generated-yaml-file

        # if come across any failure that blocks the test,
        # please remove ~/.lkp and /lkp dir to run from a clean state.



---
0DAY/LKP+ Test Infrastructure                   Open Source Technology Center
https://lists.01.org/hyperkitty/list/lkp@lists.01.org       Intel Corporation

Thanks,
Oliver Sang