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{"descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/hugetlb: fix missing hugetlb_lock for resv uncharge\n\nThere is a recent report on UFFDIO_COPY over hugetlb:\n\nhttps://lore.kernel.org/all/000000000000ee06de0616177560@google.com/\n\n350:\tlockdep_assert_held(&hugetlb_lock);\n\nShould be an issue in hugetlb but triggered in an userfault context, where\nit goes into the unlikely path where two threads modifying the resv map\ntogether. Mike has a fix in that path for resv uncharge but it looks like\nthe locking criteria was overlooked: hugetlb_cgroup_uncharge_folio_rsvd()\nwill update the cgroup pointer, so it requires to be called with the lock\nheld."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/hugetlb: corrige la falta de Hugetlb_lock para descarga de resv. Hay un informe reciente sobre UFFDIO_COPY sobre Hugetlb: https://lore.kernel.org/all/000000000000ee06de0616177560@google.com/ 350: lockdep_assert_held(&hugetlb_lock); Deber\u00eda ser un problema en hugetlb pero se activa en un contexto de error de usuario, donde entra en la ruta poco probable en la que dos subprocesos modifican el mapa resv juntos. Mike tiene una soluci\u00f3n en esa ruta para la descarga de resv, pero parece que se pas\u00f3 por alto el criterio de bloqueo: hugetlb_cgroup_uncharge_folio_rsvd() actualizar\u00e1 el puntero de cgroup, por lo que es necesario llamarlo con el bloqueo retenido."}], "id": "CVE-2024-36000", "lastModified": "2024-11-21T09:21:24.170", "metrics": {}, "published": "2024-05-20T10:15:14.163", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4c806333efea1000a2a9620926f560ad2e1ca7cc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/538faabf31e9c53d8c870d114846fda958a0de10"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b76b46902c2d0395488c8412e1116c2486cdfcb2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f6c5d21db16a0910152ec8aa9d5a7aed72694505"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/4c806333efea1000a2a9620926f560ad2e1ca7cc"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/538faabf31e9c53d8c870d114846fda958a0de10"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/b76b46902c2d0395488c8412e1116c2486cdfcb2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/f6c5d21db16a0910152ec8aa9d5a7aed72694505"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

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{}