CVE - CVE-2021-47187

CVE-ID
CVE-2021-47187	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/118c826ef8b43efe0fda8faf419673707ee8c5e5 URL:https://git.kernel.org/stable/c/118c826ef8b43efe0fda8faf419673707ee8c5e5 MISC:https://git.kernel.org/stable/c/3f1dcaff642e75c1d2ad03f783fa8a3b1f56dd50 URL:https://git.kernel.org/stable/c/3f1dcaff642e75c1d2ad03f783fa8a3b1f56dd50 MISC:https://git.kernel.org/stable/c/a14d7038ea201c5526375becfc43b9ba281b1e82 URL:https://git.kernel.org/stable/c/a14d7038ea201c5526375becfc43b9ba281b1e82 MISC:https://git.kernel.org/stable/c/e52fecdd0c142b95c720683885b06ee3f0e065c8 URL:https://git.kernel.org/stable/c/e52fecdd0c142b95c720683885b06ee3f0e065c8
Assigning CNA
kernel.org
Date Record Created
20240325	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240325)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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