[Bug 2032164] Re: A general-proteciton exception during guest migration to unsupported PKRU machine
This bug is awaiting verification that the linux-mtk/5.15.0-1032.37 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy-linux-mtk' to 'verification-done-jammy- linux-mtk'. If the problem still exists, change the tag 'verification- needed-jammy-linux-mtk' to 'verification-failed-jammy-linux-mtk'. If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-jammy-linux-mtk-v2 verification-needed-jammy-linux-mtk -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2032164 Title: A general-proteciton exception during guest migration to unsupported PKRU machine To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2032164/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2032164] Re: A general-proteciton exception during guest migration to unsupported PKRU machine
This bug is awaiting verification that the linux- bluefield/5.15.0-1043.45 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy-linux-bluefield' to 'verification-done-jammy-linux-bluefield'. If the problem still exists, change the tag 'verification-needed-jammy-linux-bluefield' to 'verification-failed-jammy-linux-bluefield'. If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-jammy-linux-bluefield-v2 verification-needed-jammy-linux-bluefield -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2032164 Title: A general-proteciton exception during guest migration to unsupported PKRU machine To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2032164/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2032164] Re: A general-proteciton exception during guest migration to unsupported PKRU machine
This bug is awaiting verification that the linux-intel- iotg-5.15/5.15.0-1056.62~20.04.1 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-focal-linux- intel-iotg-5.15' to 'verification-done-focal-linux-intel-iotg-5.15'. If the problem still exists, change the tag 'verification-needed-focal- linux-intel-iotg-5.15' to 'verification-failed-focal-linux-intel- iotg-5.15'. If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-focal-linux-intel-iotg-5.15-v2 verification-needed-focal-linux-intel-iotg-5.15 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2032164 Title: A general-proteciton exception during guest migration to unsupported PKRU machine To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2032164/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2032164] Re: A general-proteciton exception during guest migration to unsupported PKRU machine
This bug is awaiting verification that the linux-intel- iotg/5.15.0-1056.62 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy-linux-intel-iotg' to 'verification-done-jammy-linux-intel-iotg'. If the problem still exists, change the tag 'verification-needed-jammy-linux-intel-iotg' to 'verification-failed-jammy-linux-intel-iotg'. If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-jammy-linux-intel-iotg-v2 verification-needed-jammy-linux-intel-iotg -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2032164 Title: A general-proteciton exception during guest migration to unsupported PKRU machine To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2032164/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2032164] Re: A general-proteciton exception during guest migration to unsupported PKRU machine
This bug is awaiting verification that the linux- hwe-5.15/5.15.0-106.116~20.04.1 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-focal-linux- hwe-5.15' to 'verification-done-focal-linux-hwe-5.15'. If the problem still exists, change the tag 'verification-needed-focal-linux-hwe-5.15' to 'verification-failed-focal-linux-hwe-5.15'. If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-focal-linux-hwe-5.15-v2 verification-needed-focal-linux-hwe-5.15 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2032164 Title: A general-proteciton exception during guest migration to unsupported PKRU machine To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2032164/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2032164] Re: A general-proteciton exception during guest migration to unsupported PKRU machine
This bug is awaiting verification that the linux-raspi/5.15.0-1054.57 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy-linux-raspi' to 'verification-done-jammy- linux-raspi'. If the problem still exists, change the tag 'verification- needed-jammy-linux-raspi' to 'verification-failed-jammy-linux-raspi'. If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-jammy-linux-raspi-v2 verification-needed-jammy-linux-raspi -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2032164 Title: A general-proteciton exception during guest migration to unsupported PKRU machine To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2032164/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2032164] Re: A general-proteciton exception during guest migration to unsupported PKRU machine
This bug is awaiting verification that the linux-aws/5.15.0-1061.67 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy-linux-aws' to 'verification-done-jammy- linux-aws'. If the problem still exists, change the tag 'verification- needed-jammy-linux-aws' to 'verification-failed-jammy-linux-aws'. If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-jammy-linux-aws-v2 verification-needed-jammy-linux-aws -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2032164 Title: A general-proteciton exception during guest migration to unsupported PKRU machine To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2032164/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2032164] Re: A general-proteciton exception during guest migration to unsupported PKRU machine
This bug is awaiting verification that the linux-gcp/5.15.0-1059.67 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy-linux-gcp' to 'verification-done-jammy- linux-gcp'. If the problem still exists, change the tag 'verification- needed-jammy-linux-gcp' to 'verification-failed-jammy-linux-gcp'. If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-jammy-linux-gcp-v2 verification-needed-jammy-linux-gcp -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2032164 Title: A general-proteciton exception during guest migration to unsupported PKRU machine To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2032164/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2032164] Re: A general-proteciton exception during guest migration to unsupported PKRU machine
This bug is awaiting verification that the linux-gke/5.15.0-1058.63 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy-linux-gke' to 'verification-done-jammy- linux-gke'. If the problem still exists, change the tag 'verification- needed-jammy-linux-gke' to 'verification-failed-jammy-linux-gke'. If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-jammy-linux-gke-v2 verification-needed-jammy-linux-gke -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2032164 Title: A general-proteciton exception during guest migration to unsupported PKRU machine To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2032164/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2032164] Re: A general-proteciton exception during guest migration to unsupported PKRU machine
This bug is awaiting verification that the linux-ibm/5.15.0-1054.57 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy-linux-ibm' to 'verification-done-jammy- linux-ibm'. If the problem still exists, change the tag 'verification- needed-jammy-linux-ibm' to 'verification-failed-jammy-linux-ibm'. If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-jammy-linux-ibm-v2 verification-needed-jammy-linux-ibm -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2032164 Title: A general-proteciton exception during guest migration to unsupported PKRU machine To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2032164/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2032164] Re: A general-proteciton exception during guest migration to unsupported PKRU machine
This bug was fixed in the package linux - 5.15.0-106.116
---
linux (5.15.0-106.116) jammy; urgency=medium
* jammy/linux: 5.15.0-106.116 -proposed tracker (LP: #2061812)
* CVE-2024-2201
- x86/bugs: Use sysfs_emit()
- KVM: x86: Update KVM-only leaf handling to allow for 100% KVM-only leafs
- KVM: x86: Advertise CPUID.(EAX=7,ECX=2):EDX[5:0] to userspace
- KVM: x86: Use a switch statement and macros in __feature_translate()
- x86/bugs: Change commas to semicolons in 'spectre_v2' sysfs file
- x86/syscall: Don't force use of indirect calls for system calls
- x86/bhi: Add support for clearing branch history at syscall entry
- x86/bhi: Define SPEC_CTRL_BHI_DIS_S
- x86/bhi: Enumerate Branch History Injection (BHI) bug
- x86/bhi: Add BHI mitigation knob
- x86/bhi: Mitigate KVM by default
- KVM: x86: Add BHI_NO
- [Config] Set CONFIG_BHI to enabled (auto)
* Drop fips-checks script from trees (LP: #2055083)
- [Packaging] Remove fips-checks script
* alsa/realtek: adjust max output valume for headphone on 2 LG machines
(LP: #2058573)
- ALSA: hda/realtek: fix the hp playback volume issue for LG machines
* A general-proteciton exception during guest migration to unsupported PKRU
machine (LP: #2032164)
- x86/fpu: Allow caller to constrain xfeatures when copying to uabi buffer
- KVM: x86: Constrain guest-supported xfeatures only at KVM_GET_XSAVE{2}
* [ICX] [SPR] [ipc/msg] performance: Mitigate the lock contention with percpu
counter (LP: #2058485)
- ipc: check checkpoint_restore_ns_capable() to modify C/R proc files
- ipc/ipc_sysctl.c: remove fallback for !CONFIG_PROC_SYSCTL
- ipc: Store mqueue sysctls in the ipc namespace
- ipc: Store ipc sysctls in the ipc namespace
- ipc: Use the same namespace to modify and validate
- ipc: Remove extra1 field abuse to pass ipc namespace
- ipc: Check permissions for checkpoint_restart sysctls at open time
- percpu: add percpu_counter_add_local and percpu_counter_sub_local
- ipc/msg: mitigate the lock contention with percpu counter
* Jammy update: v5.15.149 upstream stable release (LP: #2059014)
- ksmbd: free ppace array on error in parse_dacl
- ksmbd: don't allow O_TRUNC open on read-only share
- ksmbd: validate mech token in session setup
- ksmbd: fix UAF issue in ksmbd_tcp_new_connection()
- ksmbd: only v2 leases handle the directory
- iio: adc: ad7091r: Set alert bit in config register
- iio: adc: ad7091r: Allow users to configure device events
- iio: adc: ad7091r: Enable internal vref if external vref is not supplied
- dmaengine: fix NULL pointer in channel unregistration function
- scsi: ufs: core: Simplify power management during async scan
- scsi: ufs: core: Remove the ufshcd_hba_exit() call from
ufshcd_async_scan()
- iio:adc:ad7091r: Move exports into IIO_AD7091R namespace.
- ext4: allow for the last group to be marked as trimmed
- btrfs: sysfs: validate scrub_speed_max value
- crypto: api - Disallow identical driver names
- PM: hibernate: Enforce ordering during image compression/decompression
- hwrng: core - Fix page fault dead lock on mmap-ed hwrng
- crypto: s390/aes - Fix buffer overread in CTR mode
- media: imx355: Enable runtime PM before registering async sub-device
- rpmsg: virtio: Free driver_override when rpmsg_remove()
- media: ov9734: Enable runtime PM before registering async sub-device
- mips: Fix max_mapnr being uninitialized on early stages
- bus: mhi: host: Drop chan lock before queuing buffers
- bus: mhi: host: Add spinlock to protect WP access when queueing TREs
- parisc/firmware: Fix F-extend for PDC addresses
- async: Split async_schedule_node_domain()
- async: Introduce async_schedule_dev_nocall()
- arm64: dts: qcom: sc7180: fix USB wakeup interrupt types
- arm64: dts: qcom: sdm845: fix USB wakeup interrupt types
- arm64: dts: qcom: sm8150: fix USB wakeup interrupt types
- arm64: dts: qcom: sdm845: fix USB DP/DM HS PHY interrupts
- lsm: new security_file_ioctl_compat() hook
- scripts/get_abi: fix source path leak
- mmc: core: Use mrq.sbc in close-ended ffu
- mmc: mmc_spi: remove custom DMA mapped buffers
- rtc: Adjust failure return code for cmos_set_alarm()
- nouveau/vmm: don't set addr on the fail path to avoid warning
- ubifs: ubifs_symlink: Fix memleak of inode->i_link in error path
- rename(): fix the locking of subdirectories
- ksmbd: set v2 lease version on lease upgrade
- ksmbd: fix potential circular locking issue in smb2_set_ea()
- ksmbd: don't increment epoch if current state and request state are same
- ksmbd: send lease break notification on FILE_RENAME_INFORMATION
- ksmbd: Add missing set_freezable() for freezable kthread
- net/smc: fix illegal rmb_desc access in SMC-D connection dump
- tcp: make sure init the
[Bug 2032164] Re: A general-proteciton exception during guest migration to unsupported PKRU machine
** Changed in: linux (Ubuntu Jammy) Status: In Progress => Fix Committed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2032164 Title: A general-proteciton exception during guest migration to unsupported PKRU machine To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2032164/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2032164] Re: A general-proteciton exception during guest migration to unsupported PKRU machine
Mantic has already included this two commits in #2049202 [1].
c95b65ba744d x86/fpu: Allow caller to constrain xfeatures when copying to
uabi buffer
97cdceb46fb3 KVM: x86: Constrain guest-supported xfeatures only at
KVM_GET_XSAVE{2}
[1] https://bugs.launchpad.net/bugs/2049202
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Title:
A general-proteciton exception during guest migration to unsupported
PKRU machine
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[Bug 2032164] Re: A general-proteciton exception during guest migration to unsupported PKRU machine
Fix is from v6.6. Noble is not affected. Question is whether this should not also be added to Mantic? ** Changed in: linux (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2032164 Title: A general-proteciton exception during guest migration to unsupported PKRU machine To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2032164/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2032164] Re: A general-proteciton exception during guest migration to unsupported PKRU machine
We have backported the following two patches in Jammy and waiting for review:
18164f66e6c5 x86/fpu: Allow caller to constrain xfeatures when copying
to uabi buffer
8647c52e9504 KVM: x86: Constrain guest-supported xfeatures only at
KVM_GET_XSAVE{2}
The fix will also apply to Focal-HWE kernel.
** Changed in: linux (Ubuntu Jammy)
Status: Triaged => In Progress
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Title:
A general-proteciton exception during guest migration to unsupported
PKRU machine
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[Bug 2032164] Re: A general-proteciton exception during guest migration to unsupported PKRU machine
** Description changed:
[Impact]
When a host that supports PKRU initiates a guest that lacks PKRU support, the
flag is enabled on the guest's fpstate.
This information is then passed to userspace through the vcpu ioctl
KVM_GET_XSAVE.
However, a problem arises when the user opts to migrate the mentioned guest
to another machine that does not support PKRU.
In this scenario, the new host attempts to restore the guest's fpu registers.
Nevertheless, due to the absence of PKRU support on the new host, a
general-protection exception takes place, leading to a guest crash.
[Fix]
The problem is resolved by the following upstream commit:
- ad856280ddea x86/kvm/fpu: Limit guest user_xfeatures to supported bits of XCR0
-
- Additionally, a subsequent fix tackles the migration problem stemming from
the earlier commit:
- a1020a25e697 KVM: x86: Always enable legacy FP/SSE in allowed user XFEATURES
+ 18164f66e6c5 x86/fpu: Allow caller to constrain xfeatures when copying to
uabi buffer
+ 8647c52e9504 KVM: x86: Constrain guest-supported xfeatures only at
KVM_GET_XSAVE{2}
[Test Plan]
- 1. Set up two machines: one with PKRU support and the other without.
- 2. Initiate a guest that lacks PKRU support on the machine with PKRU support.
- 3. Utilize libvirt to migrate the aforementioned guest to a different machine
that lacks PKRU support.
- 4. The error emerges on the destination machine:
- KVM: entry failed, hardware error 0x8021
+ Several scenarios need to be conducted to confirm the migration outcome.
+ Patched kernel with PKRU -> kernel with PKRU
+ Patched kernel with PKRU -> kernel without PKRU
+ Patched kernel without PKRU -> kernel with PKRU
+ Patched kernel without PKRU -> kernel without PKRU
+ Kernel with PKRU -> patched kernel with PKRU
+ Kernel with PKRU -> patched kernel without PKRU
+ Kernel without PKRU -> patched kernel with PKRU
+ Kernel without PKRU -> patched kernel without PKRU
+ Patched kernel with PKRU -> patched kernel without PKRU
- If you're running a guest on an Intel machine without unrestricted mode
- support, the failure can be most likely due to the guest entering an invalid
- state for Intel VT. For example, the guest maybe running in big real mode
- which is not supported on less recent Intel processors.
-
- EAX=86cf7970 EBX= ECX=0001 EDX=005b0036
- ESI=0087 EDI=0087 EBP=87c03e38 ESP=87c03e18
- EIP=86cf7d5e EFL=0246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
- ES = 9300
- CS =f000 9b00
- SS = 9300
- DS = 9300
- FS = 9300
- GS = 9300
- LDT= 8200
- TR = 8b00
- GDT=
- IDT=
- CR0=6010 CR2= CR3= CR4=
- DR0= DR1= DR2=
DR3=
- DR6=0ff0 DR7=0400
- EFER=
- Code=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
- 2023-07-09T03:03:14.911750Z qemu-system-x86_64: terminating on signal 15 from
pid 4134 (/usr/sbin/libvirtd)
- 2023-07-09 03:03:15.312+: shutting down, reason=destroyed
+ Each scenarios shall succeed except "Kernel with PKRU -> patched kernel
without PKRU" one.
+ Addressing this case poses challenges because the most plausible solution is
to clamp the FPU features at the destination during migration.
+ However, upstream does not support this approach due to concerns about
silently dropping features requested by userspace.
+ This could potentially lead to other issues and violate KVM's ABI.
[Where problems could occur]
The introduced commits will impact the guest migration process,
potentially leading to failures and preventing the guest from operating
successfully on the migration destination.
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