mirror of
https://github.com/fkie-cad/nvd-json-data-feeds.git
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49 lines
2.6 KiB
JSON
49 lines
2.6 KiB
JSON
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{
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"id": "CVE-2024-42102",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"published": "2024-07-30T08:15:02.733",
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"lastModified": "2024-07-30T08:15:02.733",
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"vulnStatus": "Received",
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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\nRevert \"mm/writeback: fix possible divide-by-zero in wb_dirty_limits(), again\"\n\nPatch series \"mm: Avoid possible overflows in dirty throttling\".\n\nDirty throttling logic assumes dirty limits in page units fit into\n32-bits. This patch series makes sure this is true (see patch 2/2 for\nmore details).\n\n\nThis patch (of 2):\n\nThis reverts commit 9319b647902cbd5cc884ac08a8a6d54ce111fc78.\n\nThe commit is broken in several ways. Firstly, the removed (u64) cast\nfrom the multiplication will introduce a multiplication overflow on 32-bit\narchs if wb_thresh * bg_thresh >= 1<<32 (which is actually common - the\ndefault settings with 4GB of RAM will trigger this). Secondly, the\ndiv64_u64() is unnecessarily expensive on 32-bit archs. We have\ndiv64_ul() in case we want to be safe & cheap. Thirdly, if dirty\nthresholds are larger than 1<<32 pages, then dirty balancing is going to\nblow up in many other spectacular ways anyway so trying to fix one\npossible overflow is just moot."
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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/000099d71648504fb9c7a4616f92c2b70c3e44ec",
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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/145faa3d03688cbb7bbaaecbd84c01539852942c",
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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/23a28f5f3f6ca1e4184bd0e9631cd0944cf1c807",
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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/253f9ea7e8e53a5176bd80ceb174907b10724c1a",
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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/2820005edae13b140f2d54267d1bd6bb23915f59",
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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/30139c702048f1097342a31302cbd3d478f50c63",
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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/cbbe17a324437c0ff99881a3ee453da45b228a00",
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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/f6620df12cb6bdcad671d269debbb23573502f9d",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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}
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]
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}
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