cve-2024-50199
Vulnerability from cvelistv5
Published
2024-11-08 05:54
Modified
2024-12-19 09:35
Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
mm/swapfile: skip HugeTLB pages for unuse_vma
I got a bad pud error and lost a 1GB HugeTLB when calling swapoff. The
problem can be reproduced by the following steps:
1. Allocate an anonymous 1GB HugeTLB and some other anonymous memory.
2. Swapout the above anonymous memory.
3. run swapoff and we will get a bad pud error in kernel message:
mm/pgtable-generic.c:42: bad pud 00000000743d215d(84000001400000e7)
We can tell that pud_clear_bad is called by pud_none_or_clear_bad in
unuse_pud_range() by ftrace. And therefore the HugeTLB pages will never
be freed because we lost it from page table. We can skip HugeTLB pages
for unuse_vma to fix it.
References
Impacted products
| Vendor | Product | Version | |||||
|---|---|---|---|---|---|---|---|
| ▼ | Linux | Linux |
Version: 0fe6e20b9c4c53b3e97096ee73a0857f60aad43f Version: 0fe6e20b9c4c53b3e97096ee73a0857f60aad43f Version: 0fe6e20b9c4c53b3e97096ee73a0857f60aad43f Version: 0fe6e20b9c4c53b3e97096ee73a0857f60aad43f Version: 0fe6e20b9c4c53b3e97096ee73a0857f60aad43f Version: 0fe6e20b9c4c53b3e97096ee73a0857f60aad43f Version: 0fe6e20b9c4c53b3e97096ee73a0857f60aad43f |
||||
|
|||||||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"mm/swapfile.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "ba7f982cdb37ff5a7739dec85d7325ea66fc1496",
"status": "affected",
"version": "0fe6e20b9c4c53b3e97096ee73a0857f60aad43f",
"versionType": "git"
},
{
"lessThan": "417d5838ca73c6331ae2fe692fab6c25c00d9a0b",
"status": "affected",
"version": "0fe6e20b9c4c53b3e97096ee73a0857f60aad43f",
"versionType": "git"
},
{
"lessThan": "e41710f5a61aca9d6baaa8f53908a927dd9e7aa7",
"status": "affected",
"version": "0fe6e20b9c4c53b3e97096ee73a0857f60aad43f",
"versionType": "git"
},
{
"lessThan": "6ec0fe3756f941f42f8c57156b8bdf2877b2ebaf",
"status": "affected",
"version": "0fe6e20b9c4c53b3e97096ee73a0857f60aad43f",
"versionType": "git"
},
{
"lessThan": "bed2b9037806c62166a0ef9a559a1e7e3e1275b8",
"status": "affected",
"version": "0fe6e20b9c4c53b3e97096ee73a0857f60aad43f",
"versionType": "git"
},
{
"lessThan": "eb66a833cdd2f7302ee05d05e0fa12a2ca32eb87",
"status": "affected",
"version": "0fe6e20b9c4c53b3e97096ee73a0857f60aad43f",
"versionType": "git"
},
{
"lessThan": "7528c4fb1237512ee18049f852f014eba80bbe8d",
"status": "affected",
"version": "0fe6e20b9c4c53b3e97096ee73a0857f60aad43f",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"mm/swapfile.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.36"
},
{
"lessThan": "2.6.36",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.285",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.228",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.169",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.114",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.58",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.11.*",
"status": "unaffected",
"version": "6.11.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.12",
"versionType": "original_commit_for_fix"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/swapfile: skip HugeTLB pages for unuse_vma\n\nI got a bad pud error and lost a 1GB HugeTLB when calling swapoff. The\nproblem can be reproduced by the following steps:\n\n 1. Allocate an anonymous 1GB HugeTLB and some other anonymous memory.\n 2. Swapout the above anonymous memory.\n 3. run swapoff and we will get a bad pud error in kernel message:\n\n mm/pgtable-generic.c:42: bad pud 00000000743d215d(84000001400000e7)\n\nWe can tell that pud_clear_bad is called by pud_none_or_clear_bad in\nunuse_pud_range() by ftrace. And therefore the HugeTLB pages will never\nbe freed because we lost it from page table. We can skip HugeTLB pages\nfor unuse_vma to fix it."
}
],
"providerMetadata": {
"dateUpdated": "2024-12-19T09:35:17.975Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/ba7f982cdb37ff5a7739dec85d7325ea66fc1496"
},
{
"url": "https://git.kernel.org/stable/c/417d5838ca73c6331ae2fe692fab6c25c00d9a0b"
},
{
"url": "https://git.kernel.org/stable/c/e41710f5a61aca9d6baaa8f53908a927dd9e7aa7"
},
{
"url": "https://git.kernel.org/stable/c/6ec0fe3756f941f42f8c57156b8bdf2877b2ebaf"
},
{
"url": "https://git.kernel.org/stable/c/bed2b9037806c62166a0ef9a559a1e7e3e1275b8"
},
{
"url": "https://git.kernel.org/stable/c/eb66a833cdd2f7302ee05d05e0fa12a2ca32eb87"
},
{
"url": "https://git.kernel.org/stable/c/7528c4fb1237512ee18049f852f014eba80bbe8d"
}
],
"title": "mm/swapfile: skip HugeTLB pages for unuse_vma",
"x_generator": {
"engine": "bippy-5f407fcff5a0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2024-50199",
"datePublished": "2024-11-08T05:54:13.403Z",
"dateReserved": "2024-10-21T19:36:19.969Z",
"dateUpdated": "2024-12-19T09:35:17.975Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2024-50199\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-11-08T06:15:16.527\",\"lastModified\":\"2024-11-08T19:01:03.880\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmm/swapfile: skip HugeTLB pages for unuse_vma\\n\\nI got a bad pud error and lost a 1GB HugeTLB when calling swapoff. The\\nproblem can be reproduced by the following steps:\\n\\n 1. Allocate an anonymous 1GB HugeTLB and some other anonymous memory.\\n 2. Swapout the above anonymous memory.\\n 3. run swapoff and we will get a bad pud error in kernel message:\\n\\n mm/pgtable-generic.c:42: bad pud 00000000743d215d(84000001400000e7)\\n\\nWe can tell that pud_clear_bad is called by pud_none_or_clear_bad in\\nunuse_pud_range() by ftrace. And therefore the HugeTLB pages will never\\nbe freed because we lost it from page table. We can skip HugeTLB pages\\nfor unuse_vma to fix it.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/swapfile: omitir p\u00e1ginas HugeTLB para unuse_vma Obtuve un error pud incorrecto y perd\u00ed un HugeTLB de 1 GB al llamar a swapoff. El problema se puede reproducir mediante los siguientes pasos: 1. Asignar un HugeTLB an\u00f3nimo de 1 GB y otra memoria an\u00f3nima. 2. Intercambiar la memoria an\u00f3nima anterior. 3. Ejecutar swapoff y obtendremos un error pud incorrecto en el mensaje del kernel: mm/pgtable-generic.c:42: bad pud 00000000743d215d(84000001400000e7) Podemos decir que pud_clear_bad es llamado por pud_none_or_clear_bad en unuse_pud_range() por ftrace. Y por lo tanto, las p\u00e1ginas HugeTLB nunca se liberar\u00e1n porque las perdimos de la tabla de p\u00e1ginas. Podemos omitir las p\u00e1ginas HugeTLB para unuse_vma para solucionarlo.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/417d5838ca73c6331ae2fe692fab6c25c00d9a0b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6ec0fe3756f941f42f8c57156b8bdf2877b2ebaf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7528c4fb1237512ee18049f852f014eba80bbe8d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ba7f982cdb37ff5a7739dec85d7325ea66fc1496\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bed2b9037806c62166a0ef9a559a1e7e3e1275b8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e41710f5a61aca9d6baaa8f53908a927dd9e7aa7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/eb66a833cdd2f7302ee05d05e0fa12a2ca32eb87\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.