<html><head></head><body>So is the entire 4.15 kernel broken for vfio? <div class="gmail_quote">On February 23, 2018 6:15:38 PM PST, Nick Sarnie <commendsarnex@gmail.com> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <pre class="k9mail">On Fri, Feb 23, 2018 at 6:04 PM, Will Marler <will@wmarler.com> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #729fcf; padding-left: 1ex;"> I'm running Arch and updating recently has caused my VM to stop booting. Watching journalctl I see this when I try to start the VM: "Feb 23 15:04:07 haze kernel: BUG: unable to handle kernel NULL pointer dereference at 00000000000000a8 Feb 23 15:04:07 haze kernel: IP: down_write+0x12/0x30 and some more. Full pastebin is here: <a href="https://pastebin.com/8u70XLWJ">https://pastebin.com/8u70XLWJ</a> This happens when I try to start my domain (called "Win10Full"). When it occurs, virsh locks up -- if I'm in virsh and do "list" it sits indefinitely. If I ctrl-C at this point, "End of file while reading data: Input/output error" gets written to the log, and my host cannot be rebooted without a physical power cycle. There is nothing that gets written to /var/log/libvirt/qemu/Win10Full.log. I'm not sure how to proceed; I figured this mailing list would be the first place to start. Any suggestions? Thanks in advance, Will <hr> vfio-users mailing list vfio-users@redhat.com <a href="https://www.redhat.com/mailman/listinfo/vfio-users">https://www.redhat.com/mailman/listinfo/vfio-users</a></blockquote> Hi, This is a bug in 4.15. You can either revert to 4.14, or revert this patch and recompile the kernel: <a href="https://patchwork.kernel.org/patch/10103043/raw/">https://patchwork.kernel.org/patch/10103043/raw/</a> Sarnex <hr> vfio-users mailing list vfio-users@redhat.com <a href="https://www.redhat.com/mailman/listinfo/vfio-users">https://www.redhat.com/mailman/listinfo/vfio-users</a> </pre></blockquote></div></body></html>