linux-kernel - Re: [regression, bisected, pci/iommu] Bug 216865 - Black screen when amdgpu started during 6.2-rc1 boot with AMD IOMMU enabled

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <223ee6d6-70ea-1d53-8bc2-2d22201d8dde@bell.net>
Date:   Wed, 4 Jan 2023 20:09:33 -0500
From:   Matt Fagnani <matt.fagnani@...l.net>
To:     Vasant Hegde <vasant.hegde@....com>,
        Baolu Lu <baolu.lu@...ux.intel.com>,
        Thorsten Leemhuis <regressions@...mhuis.info>
Cc:     Joerg Roedel <jroedel@...e.de>,
        "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
        LKML <linux-kernel@...r.kernel.org>,
        "regressions@...ts.linux.dev" <regressions@...ts.linux.dev>,
        Linux PCI <linux-pci@...r.kernel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: [regression, bisected, pci/iommu] Bug 216865 - Black screen when amdgpu started during 6.2-rc1 boot with AMD IOMMU enabled

I built 6.2-rc2 with the patch applied. The same black screen problem 
happened with 6.2-rc2 with the patch. I tried to use early kdump with 
6.2-rc2 with the patch twice by panicking the kernel with sysrq+alt+c 
after the black screen happened. The system rebooted after about 10-20 
seconds both times, but no kdump and dmesg files were saved in 
/var/crash. I'm attaching the lspci -vvv output as requested.

View attachment "lspci-vvv-2.txt" of type "text/plain" (33871 bytes)