In the Linux kernel, the following vulnerability has been resolved:
arm64: dts: qcom: msm8998: Fix CPU/L2 idle state latency and residency
The entry/exit latency and minimum residency in state for the idle
states of MSM8998 were ..bad: first of all, for all of them the
timings were written for CPU sleep but the min-residency-us param
was miscalculated (supposedly, while porting this from downstream);
Then, the power collapse states are setting PC on both the CPU
cluster *and* the L2 cache, which have different timings: in the
specific case of L2 the times are higher so these ones should be
taken into account instead of the CPU ones.
This parameter misconfiguration was not giving particular issues
because on MSM8998 there was no CPU scaling at all, so cluster/L2
power collapse was rarely (if ever) hit.
When CPU scaling is enabled, though, the wrong timings will produce
SoC unstability shown to the user as random, apparently error-less,
sudden reboots and/or lockups.
This set of parameters are stabilizing the SoC when CPU scaling is
ON and when power collapse is frequently hit.
References
Configurations
Configuration 1 (hide)
|
History
21 Mar 2025, 11:57
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CWE | NVD-CWE-noinfo | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| First Time |
Linux linux Kernel
Linux |
|
| References | () https://git.kernel.org/stable/c/118c826ef8b43efe0fda8faf419673707ee8c5e5 - Patch | |
| References | () https://git.kernel.org/stable/c/3f1dcaff642e75c1d2ad03f783fa8a3b1f56dd50 - Patch | |
| References | () https://git.kernel.org/stable/c/a14d7038ea201c5526375becfc43b9ba281b1e82 - Patch | |
| References | () https://git.kernel.org/stable/c/e52fecdd0c142b95c720683885b06ee3f0e065c8 - Patch |
Information
Published : 2024-04-10 19:15
Updated : 2025-03-21 11:57
NVD link : CVE-2021-47187
Mitre link : CVE-2021-47187
CVE.ORG link : CVE-2021-47187
JSON object : View
Products Affected
linux
- linux_kernel
CWE