ghsa-3q6x-gxwh-88p9
Vulnerability from github
Published
2024-06-19 15:30
Modified
2024-08-29 03:30
Severity
Details
In the Linux kernel, the following vulnerability has been resolved:
lib/test_hmm.c: handle src_pfns and dst_pfns allocation failure
The kcalloc() in dmirror_device_evict_chunk() will return null if the physical memory has run out. As a result, if src_pfns or dst_pfns is dereferenced, the null pointer dereference bug will happen.
Moreover, the device is going away. If the kcalloc() fails, the pages mapping a chunk could not be evicted. So add a __GFP_NOFAIL flag in kcalloc().
Finally, as there is no need to have physically contiguous memory, Switch kcalloc() to kvcalloc() in order to avoid failing allocations.
{
"affected": [],
"aliases": [
"CVE-2024-38543"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-06-19T14:15:14Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nlib/test_hmm.c: handle src_pfns and dst_pfns allocation failure\n\nThe kcalloc() in dmirror_device_evict_chunk() will return null if the\nphysical memory has run out. As a result, if src_pfns or dst_pfns is\ndereferenced, the null pointer dereference bug will happen.\n\nMoreover, the device is going away. If the kcalloc() fails, the pages\nmapping a chunk could not be evicted. So add a __GFP_NOFAIL flag in\nkcalloc().\n\nFinally, as there is no need to have physically contiguous memory, Switch\nkcalloc() to kvcalloc() in order to avoid failing allocations.",
"id": "GHSA-3q6x-gxwh-88p9",
"modified": "2024-08-29T03:30:48Z",
"published": "2024-06-19T15:30:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-38543"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1a21fdeea502658e315bd939409b755974f4fb64"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3b20d18f475bd17309db640dbe7d7c7ebb5bc2bc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/65e528a69cb3ed4a286c45b4afba57461c8b5b33"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c2af060d1c18beaec56351cf9c9bcbbc5af341a3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ce47e8ead9a72834cc68431d53f8092ce69bebb7"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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