sched: Fix out-of-bound access in uclamp
Util-clamp places tasks in different buckets based on their clamp values
for performance reasons. However, the size of buckets is currently
computed using a rounding division, which can lead to an off-by-one
error in some configurations.
For instance, with 20 buckets, the bucket size will be 1024/20=51. A
task with a clamp of 1024 will be mapped to bucket id 1024/51=20. Sadly,
correct indexes are in range [0,19], hence leading to an out of bound
memory access.
Clamp the bucket id to fix the issue.
No advisories yet.
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Tue, 24 Dec 2024 15:00:00 +0000
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Linux
Linux linux Kernel |
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| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
Mon, 04 Nov 2024 13:15:00 +0000
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|---|---|---|
| Metrics |
ssvc
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Wed, 11 Sep 2024 18:30:00 +0000
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| Metrics |
ssvc
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Wed, 11 Sep 2024 13:30:00 +0000
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| Metrics |
ssvc
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Projects
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Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2025-05-04T07:01:54.678Z
Reserved: 2024-02-27T18:42:55.949Z
Link: CVE-2021-46993
Updated: 2024-08-04T05:24:37.912Z
Status : Analyzed
Published: 2024-02-28T09:15:37.880
Modified: 2024-12-24T14:40:13.420
Link: CVE-2021-46993
OpenCVE Enrichment
No data.