Huawei EulerOS: CVE-2024-44948: kernel security update
Description
In the Linux kernel, the following vulnerability has been resolved: x86/mtrr: Check if fixed MTRRs exist before saving them MTRRs have an obsolete fixed variant for fine grained caching control of the 640K-1MB region that uses separate MSRs. This fixed variant has a separate capability bit in the MTRR capability MSR. So far all x86 CPUs which support MTRR have this separate bit set, so it went unnoticed that mtrr_save_state() does not check the capability bit before accessing the fixed MTRR MSRs. Though on a CPU that does not support the fixed MTRR capability this results in a #GP. The #GP itself is harmless because the RDMSR fault is handled gracefully, but results in a WARN_ON(). Add the missing capability check to prevent this.
Solution(s)
- huawei-euleros-2_0_sp9-upgrade-kernel
- huawei-euleros-2_0_sp9-upgrade-kernel-tools
- huawei-euleros-2_0_sp9-upgrade-kernel-tools-libs
- huawei-euleros-2_0_sp9-upgrade-python3-perf
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