CVE-2023-52942 (GCVE-0-2023-52942)
Vulnerability from cvelistv5
Published
2025-03-27 16:37
Modified
2025-05-04 07:46
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: cgroup/cpuset: Fix wrong check in update_parent_subparts_cpumask() It was found that the check to see if a partition could use up all the cpus from the parent cpuset in update_parent_subparts_cpumask() was incorrect. As a result, it is possible to leave parent with no effective cpu left even if there are tasks in the parent cpuset. This can lead to system panic as reported in [1]. Fix this probem by updating the check to fail the enabling the partition if parent's effective_cpus is a subset of the child's cpus_allowed. Also record the error code when an error happens in update_prstate() and add a test case where parent partition and child have the same cpu list and parent has task. Enabling partition in the child will fail in this case. [1] https://www.spinics.net/lists/cgroups/msg36254.html
References
Impacted products
Vendor Product Version
Linux Linux Version: f0af1bfc27b52a4d42510051154c61bd176a8f06
Version: f0af1bfc27b52a4d42510051154c61bd176a8f06
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncgroup/cpuset: Fix wrong check in update_parent_subparts_cpumask()\n\nIt was found that the check to see if a partition could use up all\nthe cpus from the parent cpuset in update_parent_subparts_cpumask()\nwas incorrect. As a result, it is possible to leave parent with no\neffective cpu left even if there are tasks in the parent cpuset. This\ncan lead to system panic as reported in [1].\n\nFix this probem by updating the check to fail the enabling the partition\nif parent\u0027s effective_cpus is a subset of the child\u0027s cpus_allowed.\n\nAlso record the error code when an error happens in update_prstate()\nand add a test case where parent partition and child have the same cpu\nlist and parent has task. Enabling partition in the child will fail in\nthis case.\n\n[1] https://www.spinics.net/lists/cgroups/msg36254.html"
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    "datePublished": "2025-03-27T16:37:20.155Z",
    "dateReserved": "2024-08-21T06:07:11.022Z",
    "dateUpdated": "2025-05-04T07:46:34.623Z",
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