Skip to content

fix(test/vulnerabilities): add exception for TSA before 6.1.153 #5458

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 2 commits into from
Oct 1, 2025
Merged

fix(test/vulnerabilities): add exception for TSA before 6.1.153 #5458

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
ac342ed
fix(test/vulnerabilities): add exception for TSA before 6.1.153
Manciukic Sep 30, 2025
2fbb814
Merge branch 'main' into fix-tsa-vuln-check
Manciukic Oct 1, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
26 changes: 26 additions & 0 deletions tests/integration_tests/security/test_vulnerabilities.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -11,11 +11,13 @@

import pytest
import requests
from packaging import version

from framework import utils
from framework.ab_test import git_clone
from framework.microvm import MicroVMFactory
from framework.properties import global_props
from framework.utils_cpuid import CpuVendor, get_cpu_vendor

CHECKER_URL = "https://raw.githubusercontent.com/speed47/spectre-meltdown-checker/master/spectre-meltdown-checker.sh"
CHECKER_FILENAME = "spectre-meltdown-checker.sh"
Expand Down Expand Up @@ -132,8 +134,32 @@ def get_vuln_files_exception_dict(template):
"""
Returns a dictionary of expected values for vulnerability files requiring special treatment.
"""
host_kernel_version = version.parse(utils.get_kernel_version())
cpu_vendor = get_cpu_vendor()
exception_dict = {}

# Exception for tsa
# =============================
#
# AMD guests on 6.1 hosts before 6.1.153
# --------------------------------------------
# On 6.1 kernels before 6.1.153 [1], KVM doesn't tell the guest that the microcode with the TSA
# mitigation has been applied by setting CPUID.(EAX=0x80000021,ECX=0):EAX[5 (CLEAR_VERW)].
# The guest applies the mitigation anyways, but flags it as possibly vulnerable as it cannot
# verify that the microcode update has been applied correctly.
# Note that this doesn't affect the T2A template (deprecated) as the presented CPU is older
# and not recognised as being affected by TSA.
# [1]: https://github.com/amazonlinux/linux/commit/8d1e0db16431610b5b35737d88595bdd7a08e271

if (
cpu_vendor == CpuVendor.AMD
and template == "None"
and host_kernel_version.major == 6
and host_kernel_version.minor == 1
and host_kernel_version.micro < 153
):
exception_dict["tsa"] = "Vulnerable: Clear CPU buffers attempted, no microcode"

# Exception for mmio_stale_data
# =============================
#
Expand Down