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29 lines
2.5 KiB
JSON
29 lines
2.5 KiB
JSON
{
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"id": "CVE-2024-35846",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"published": "2024-05-17T15:15:21.547",
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"lastModified": "2024-05-17T18:35:35.070",
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"vulnStatus": "Awaiting Analysis",
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"cveTags": [],
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm: zswap: fix shrinker NULL crash with cgroup_disable=memory\n\nChristian reports a NULL deref in zswap that he bisected down to the zswap\nshrinker. The issue also cropped up in the bug trackers of libguestfs [1]\nand the Red Hat bugzilla [2].\n\nThe problem is that when memcg is disabled with the boot time flag, the\nzswap shrinker might get called with sc->memcg == NULL. This is okay in\nmany places, like the lruvec operations. But it crashes in\nmemcg_page_state() - which is only used due to the non-node accounting of\ncgroup's the zswap memory to begin with.\n\nNhat spotted that the memcg can be NULL in the memcg-disabled case, and I\nwas then able to reproduce the crash locally as well.\n\n[1] https://github.com/libguestfs/libguestfs/issues/139\n[2] https://bugzilla.redhat.com/show_bug.cgi?id=2275252"
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},
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{
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"lang": "es",
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"value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: mm: zswap: corrige el bloqueo NULL del reductor con cgroup_disable=memory. Christian informa una deref NULL en zswap que dividi\u00f3 en dos hasta el reductor zswap. El problema tambi\u00e9n surgi\u00f3 en los rastreadores de errores de libguestfs [1] y Red Hat bugzilla [2]. El problema es que cuando memcg est\u00e1 deshabilitado con el indicador de tiempo de arranque, es posible que se llame al reductor zswap con sc->memcg == NULL. Esto est\u00e1 bien en muchos lugares, como en las operaciones de lruvec. Pero fallo en memcg_page_state(), que para empezar solo se usa debido a la contabilidad sin nodos de la memoria zswap de cgroup. Nhat detect\u00f3 que memcg puede ser NULL en el caso de que memcg est\u00e9 deshabilitado y luego tambi\u00e9n pude reproducir el fallo localmente. [1] https://github.com/libguestfs/libguestfs/issues/139 [2] https://bugzilla.redhat.com/show_bug.cgi?id=2275252"
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}
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],
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"metrics": {},
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/682886ec69d22363819a83ddddd5d66cb5c791e1",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/b0fdabc908a7f81d12382c87ca9e46a9c2e14042",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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}
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]
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} |