From: bugzilla-daemon@bugzilla.kernel.org
To: kvm@vger.kernel.org
Subject: [Bug 206579] KVM with passthrough generates "BUG: kernel NULL pointer dereference" and crashes
Date: Mon, 24 Feb 2020 17:57:15 +0000 [thread overview]
Message-ID: <bug-206579-28872-bCp5tS1Fl1@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-206579-28872@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=206579
--- Comment #12 from Paolo Bonzini (bonzini@gnu.org) ---
Comment on attachment 287579
--> https://bugzilla.kernel.org/attachment.cgi?id=287579
Patched rc3 dmesg crash output
Based on the crashdump the failure seems to be at:
if (!svm->vcpu.arch.apic->regs)
return -EINVAL;
in avic_init_backing_page. This suggests refining the patch to look like this:
-----
if (!avic && !irqchip_in_kernel(vcpu->kvm))
return 0;
ret = avic_init_backing_page(&svm->vcpu);
-----
muncrief, please in addition to testing the patch can you include the qemu
command line (from "ps aux")? I see nothing in your libvirt XML that suggests
disabling KVM's in-kernel emulation of the local APIC (and the fact that
EPYC-IBPB disables x2APIC also suggests that it's disabled), so we might have
two bugs here.
What is your QEMU version?
--
You are receiving this mail because:
You are watching the assignee of the bug.
next prev parent reply other threads:[~2020-02-24 17:57 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-17 18:17 [Bug 206579] New: KVM with passthrough generates "BUG: kernel NULL pointer dereference" and crashes bugzilla-daemon
2020-02-18 6:45 ` [Bug 206579] " bugzilla-daemon
2020-02-18 18:54 ` bugzilla-daemon
2020-02-18 19:55 ` bugzilla-daemon
2020-02-21 14:56 ` bugzilla-daemon
2020-02-21 19:15 ` bugzilla-daemon
2020-02-21 21:27 ` bugzilla-daemon
2020-02-22 0:21 ` bugzilla-daemon
2020-02-24 13:52 ` bugzilla-daemon
2020-02-24 14:24 ` bugzilla-daemon
2020-02-24 14:44 ` bugzilla-daemon
2020-02-24 16:50 ` bugzilla-daemon
2020-02-24 17:57 ` bugzilla-daemon [this message]
2020-02-24 20:36 ` bugzilla-daemon
2020-02-24 20:38 ` bugzilla-daemon
2020-02-24 21:43 ` bugzilla-daemon
2020-02-24 21:47 ` bugzilla-daemon
2020-02-24 22:09 ` bugzilla-daemon
2020-02-24 22:53 ` bugzilla-daemon
2020-02-24 23:08 ` bugzilla-daemon
2020-02-25 7:50 ` bugzilla-daemon
2020-02-25 8:53 ` bugzilla-daemon
2020-02-25 20:34 ` bugzilla-daemon
2020-02-25 20:42 ` bugzilla-daemon
2020-02-26 2:25 ` bugzilla-daemon
2020-02-26 20:34 ` bugzilla-daemon
2020-02-27 14:49 ` bugzilla-daemon
2020-02-27 20:50 ` bugzilla-daemon
2020-02-27 23:00 ` bugzilla-daemon
2020-02-28 0:12 ` bugzilla-daemon
2020-02-28 0:20 ` bugzilla-daemon
2020-02-28 3:38 ` bugzilla-daemon
2020-02-28 3:44 ` bugzilla-daemon
2020-02-28 7:25 ` bugzilla-daemon
2020-02-28 7:26 ` bugzilla-daemon
2020-02-28 7:55 ` bugzilla-daemon
2020-02-28 16:06 ` bugzilla-daemon
2020-02-28 20:14 ` bugzilla-daemon
2020-02-28 21:49 ` bugzilla-daemon
2020-02-29 7:02 ` bugzilla-daemon
2020-02-29 17:40 ` bugzilla-daemon
2020-02-29 19:43 ` bugzilla-daemon
2020-03-01 6:27 ` bugzilla-daemon
2020-03-01 18:21 ` bugzilla-daemon
2020-03-02 7:01 ` bugzilla-daemon
2020-03-03 5:04 ` bugzilla-daemon
2020-03-22 13:43 ` bugzilla-daemon
2020-03-22 18:58 ` bugzilla-daemon
2020-04-03 13:55 ` bugzilla-daemon
2020-04-04 12:57 ` bugzilla-daemon
2020-04-04 13:02 ` bugzilla-daemon
2020-04-04 19:24 ` bugzilla-daemon
2020-04-05 16:52 ` bugzilla-daemon
2020-04-06 2:50 ` bugzilla-daemon
2020-04-06 10:27 ` bugzilla-daemon
2020-04-10 19:28 ` bugzilla-daemon
2020-04-11 0:20 ` bugzilla-daemon
2020-04-13 16:51 ` bugzilla-daemon
2020-04-13 17:20 ` bugzilla-daemon
2020-04-18 22:28 ` bugzilla-daemon
2020-04-18 23:19 ` bugzilla-daemon
2020-04-22 21:49 ` bugzilla-daemon
2020-04-27 19:11 ` bugzilla-daemon
2020-05-03 19:58 ` bugzilla-daemon
2020-08-24 17:03 ` bugzilla-daemon
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=bug-206579-28872-bCp5tS1Fl1@https.bugzilla.kernel.org/ \
--to=bugzilla-daemon@bugzilla.kernel.org \
--cc=kvm@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.