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Bug 2086262 - [Win11][tpm]vfio_listener_region_del received unaligned region
Summary: [Win11][tpm]vfio_listener_region_del received unaligned region
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: qemu-kvm
Version: 9.1
Hardware: x86_64
OS: Windows
medium
medium
Target Milestone: rc
: ---
Assignee: Eric Auger
QA Contact: Yanghang Liu
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-05-15 07:46 UTC by Yanghang Liu
Modified: 2022-11-15 10:20 UTC (History)
8 users (show)

Fixed In Version: qemu-kvm-7.0.0-6.el9
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2022-11-15 09:54:42 UTC
Type: ---
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Gitlab redhat/centos-stream/src qemu-kvm merge_requests 101 0 None opened vfio/common: remove spurious warning on vfio_listener_region_del 2022-06-09 15:03:26 UTC
Red Hat Issue Tracker RHELPLAN-122047 0 None None None 2022-05-15 08:06:18 UTC
Red Hat Product Errata RHSA-2022:7967 0 None None None 2022-11-15 09:55:24 UTC

Description Yanghang Liu 2022-05-15 07:46:32 UTC 
Description of problem:
When hotunplug the PF from the win11 domain (with tpm device), the qemu-kvm will throw " vfio_listener_region del received unaligned region"



Version-Release number of selected component (if applicable):
5.14.0-87.el9.x86_64
qemu-kvm-7.0.0-3.el9.x86_64



How reproducible:
100%

Steps to Reproduce:
1. start a win11 domain with a QL41112 PF and tpm device

# virt-install --machine=q35 --noreboot --name=win11 --memory=4096 --vcpus=4 --graphics type=vnc,port=5911,listen=0.0.0.0 --import --noautoconsole  --network bridge=switch,model=virtio,mac=52:54:00:01:11:11 --disk path=/home/images/win11.qcow2,bus=virtio,cache=none,format=qcow2,io=threads,size=20  --boot=uefi --boot nvram.template=/usr/share/edk2/ovmf/OVMF_VARS.fd --tpm model=tpm-crb,backend.type=emulator --hostdev 0000:3b:00.0 

2. check the QL41112 PF info in the Win11 vm
The PF works properly

3. hot-unplug the PF from the win11 domain
virsh detach-device win11 /tmp/device/0000:3b:00.0.xml
Device detached successfully

4. check the qemu-kvm info

2022-05-15T07:44:06.263771Z qemu-kvm: vfio_listener_region_del received unaligned region


Actual results:
qemu-kvm: vfio_listener_region_del received unaligned region

Expected results:
The qemu-kvm will not throw any suspicious information

Additional info:

a similar bug : Bug 2037612 - [Win11][tpm][QL41112 PF] vfio_listener_region_add received unaligned region
Comment 1 Alex Williamson 2022-05-17 20:11:38 UTC 
Eric, looks like we missed that vfio_listener_region_del() also needs to check vfio_known_safe_misalignment() now.
Comment 2 Eric Auger 2022-05-24 11:55:38 UTC 
"[PATCH] vfio/common: remove spurious warning on vfio_listener_region_del" sent upstream
Comment 4 Yanan Fu 2022-06-13 09:55:00 UTC 
QE bot(pre verify): Set 'Verified:Tested,SanityOnly' as gating/tier1 test pass.
Comment 5 Yanghang Liu 2022-06-14 05:51:52 UTC 
> Steps to Reproduce:
> 1. start a win11 domain with a QL41112 PF and tpm device
> 
> # virt-install --machine=q35 --noreboot --name=win11 --memory=4096 --vcpus=4
> --graphics type=vnc,port=5911,listen=0.0.0.0 --import --noautoconsole 
> --network bridge=switch,model=virtio,mac=52:54:00:01:11:11 --disk
> path=/home/images/win11.qcow2,bus=virtio,cache=none,format=qcow2,io=threads,
> size=20  --boot=uefi --boot nvram.template=/usr/share/edk2/ovmf/OVMF_VARS.fd
> --tpm model=tpm-crb,backend.type=emulator --hostdev 0000:3b:00.0 
> 
> 2. check the QL41112 PF info in the Win11 vm
> The PF works properly
> 
> 3. hot-unplug the PF from the win11 domain
> virsh detach-device win11 /tmp/device/0000:3b:00.0.xml
> Device detached successfully
> 
> 4. check the qemu-kvm info
> 
> 2022-05-15T07:44:06.263771Z qemu-kvm: vfio_listener_region_del received unaligned region

This bug can still be reproduced in qemu-kvm-7.0.0-5.el9.x86_64
Comment 6 Yanghang Liu 2022-06-14 07:17:42 UTC 
Verification:


Test env:
kernel-5.14.0-108.el9 
qemu-kvm-7.0.0-6.el9


Test result: PASS


Test step:
> 1. start a win11 domain with a QL41112 PF and tpm device
> 
> # virt-install --machine=q35 --noreboot --name=win11 --memory=4096 --vcpus=4
> --graphics type=vnc,port=5911,listen=0.0.0.0 --import --noautoconsole 
> --network bridge=switch,model=virtio,mac=52:54:00:01:11:11 --disk
> path=/home/images/win11.qcow2,bus=virtio,cache=none,format=qcow2,io=threads,
> size=20  --boot=uefi --boot nvram.template=/usr/share/edk2/ovmf/OVMF_VARS.fd
> --tpm model=tpm-crb,backend.type=emulator --hostdev 0000:3b:00.0 

The win11 domain with a QL41112 PF and tpm device can be started successfully

> 2. check the QL41112 PF info in the Win11 vm

The PF works properly
 
> 3. hot-unplug the PF from the win11 domain
> virsh detach-device win11 /tmp/device/0000:3b:00.0.xml
> Device detached successfully

{"execute":"device_del","arguments":{"id":"hostdev0"},"id":"libvirt-407"}
{"timestamp": {"seconds": 1655190578, "microseconds": 237219}, "event": "DEVICE_DELETED", "data": {"device": "hostdev0", "path": "/machine/peripheral/hostdev0"}}

> 4. check the qemu-kvm info

The qemu-kvm does not throw any suspicious information like "qemu-kvm: vfio_listener_region_del received unaligned region"
Comment 9 Yanghang Liu 2022-06-15 05:26:13 UTC 
Move the bug status to VERIFIED based on Comment 5 and Comment 6
Comment 11 errata-xmlrpc 2022-11-15 09:54:42 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: qemu-kvm security, bug fix, and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2022:7967
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