Bug 1310258

Summary: [abrt] WARNING: CPU: 2 PID: 1 at drivers/iommu/amd_iommu_init.c:2301 amd_iommu_pc_get_set_reg_val+0xa8/0xe0()
Product: [Fedora] Fedora Reporter: Dario Castellarin <req1348>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED NEXTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 23CC: gansalmon, itamar, jonathan, kernel-maint, labbott, madhu.chinakonda, mchehab, req1348
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Unspecified   
URL: https://retrace.fedoraproject.org/faf/reports/bthash/a7b344498ed961c495d01bf61823d897c5ae7984
Whiteboard: abrt_hash:6d8cc4785da9c171104095bed7aece0172cbd593;VARIANT_ID=workstation;
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2016-03-24 23:03:53 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
File: dmesg
none
Dmesg with working AMD IOMMU none

Description Dario Castellarin 2016-02-19 22:03:35 UTC 
Description of problem:
Just happened when booting this kernel for the first time

Additional info:
reporter:       libreport-2.6.4
WARNING: CPU: 2 PID: 1 at drivers/iommu/amd_iommu_init.c:2301 amd_iommu_pc_get_set_reg_val+0xa8/0xe0()
Modules linked in:
CPU: 2 PID: 1 Comm: swapper/0 Not tainted 4.4.2-300.fc23.x86_64 #1
Hardware name: Hewlett-Packard HP EliteBook 755 G2/221C, BIOS M84 Ver. 01.10 10/20/2015
 0000000000000000 0000000026124b43 ffff88042d687d20 ffffffff813b0c9f
 0000000000000000 ffff88042d687d58 ffffffff810a2f12 ffff88042f014800
 0000000000000040 0000000000000000 ffffffff81d6c73d 0000000000000000
Call Trace:
 [<ffffffff813b0c9f>] dump_stack+0x44/0x55
 [<ffffffff810a2f12>] warn_slowpath_common+0x82/0xc0
 [<ffffffff81d6c73d>] ? memblock_find_dma_reserve+0x16a/0x16a
 [<ffffffff810a305a>] warn_slowpath_null+0x1a/0x20
 [<ffffffff814d3f48>] amd_iommu_pc_get_set_reg_val+0xa8/0xe0
 [<ffffffff81dafda7>] iommu_go_to_state+0x4d6/0x1384
 [<ffffffff813c02ea>] ? kvasprintf+0x7a/0xa0
 [<ffffffff81d6c73d>] ? memblock_find_dma_reserve+0x16a/0x16a
 [<ffffffff81db0cbd>] amd_iommu_init+0x13/0x201
 [<ffffffff81d6c74f>] pci_iommu_init+0x12/0x3c
 [<ffffffff81002123>] do_one_initcall+0xb3/0x200
 [<ffffffff810c0935>] ? parse_args+0x295/0x4b0
 [<ffffffff81d621c8>] kernel_init_freeable+0x189/0x223
 [<ffffffff8178dc00>] ? rest_init+0x80/0x80
 [<ffffffff8178dc0e>] kernel_init+0xe/0xe0
 [<ffffffff81799c8f>] ret_from_fork+0x3f/0x70
 [<ffffffff8178dc00>] ? rest_init+0x80/0x80
Comment 1 Dario Castellarin 2016-02-19 22:03:47 UTC 
Created attachment 1128672 [details]
File: dmesg
Comment 2 Laura Abbott 2016-02-22 18:36:25 UTC 
Can you test http://koji.fedoraproject.org/koji/taskinfo?taskID=13096023 when it finishes to see if the warnings go away?
Comment 3 Dario Castellarin 2016-02-22 23:09:29 UTC 
No that build won't even boot, I get a double free error (at a different memory location every time) just after grub.
Comment 4 Laura Abbott 2016-02-23 00:15:36 UTC 
ugh. thanks for testing. Can you give logs or a screenshot of the error you are seeing?
Comment 5 Dario Castellarin 2016-02-23 10:01:23 UTC 
Created attachment 1129689 [details]
Dmesg with working AMD IOMMU
Comment 6 Dario Castellarin 2016-02-23 10:01:39 UTC 
No sorry, the boot failure happen only with SecureBoot enabled, apparently scratch builds are not signed. I think it still should fail more gracefully...
I can confirm that the issue with AMD IOMMU is fixed in this build, attaching dmesg for proof.
Comment 7 Laura Abbott 2016-02-23 17:29:19 UTC 
Thanks for following up. There is an existing bug in GRUB about the failure mode of an unsigned build. I agree the failure mode is not very nice.

I'm going to pull the patches in mostly because having the warning on every boot is obnoxious. Thanks again for testing.
Comment 8 Fedora Update System 2016-02-24 17:20:05 UTC 
kernel-4.4.2-301.fc23 has been submitted as an update to Fedora 23. https://bodhi.fedoraproject.org/updates/FEDORA-2016-7e12ae5359
Comment 9 Fedora Update System 2016-02-26 02:24:09 UTC 
kernel-4.4.2-301.fc23 has been pushed to the Fedora 23 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-7e12ae5359
Comment 10 Fedora Update System 2016-02-28 12:20:49 UTC 
kernel-4.4.2-301.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.