cve-2024-27005
Vulnerability from cvelistv5
Published
2024-05-01 05:28
Modified
2024-08-02 00:21
Severity
Summary
interconnect: Don't access req_list while it's being manipulated
References
SourceURLTags
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4c65507121ea8e0b47fae6d2049c8688390d46b6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d0d04efa2e367921654b5106cc5c05e3757c2b42
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/de1bf25b6d771abdb52d43546cf57ad775fb68a1
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
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    "cna": {
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          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ninterconnect: Don\u0027t access req_list while it\u0027s being manipulated\n\nThe icc_lock mutex was split into separate icc_lock and icc_bw_lock\nmutexes in [1] to avoid lockdep splats. However, this didn\u0027t adequately\nprotect access to icc_node::req_list.\n\nThe icc_set_bw() function will eventually iterate over req_list while\nonly holding icc_bw_lock, but req_list can be modified while only\nholding icc_lock. This causes races between icc_set_bw(), of_icc_get(),\nand icc_put().\n\nExample A:\n\n  CPU0                               CPU1\n  ----                               ----\n  icc_set_bw(path_a)\n    mutex_lock(\u0026icc_bw_lock);\n                                     icc_put(path_b)\n                                       mutex_lock(\u0026icc_lock);\n    aggregate_requests()\n      hlist_for_each_entry(r, ...\n                                       hlist_del(...\n        \u003cr = invalid pointer\u003e\n\nExample B:\n\n  CPU0                               CPU1\n  ----                               ----\n  icc_set_bw(path_a)\n    mutex_lock(\u0026icc_bw_lock);\n                                     path_b = of_icc_get()\n                                       of_icc_get_by_index()\n                                         mutex_lock(\u0026icc_lock);\n                                         path_find()\n                                           path_init()\n    aggregate_requests()\n      hlist_for_each_entry(r, ...\n                                             hlist_add_head(...\n        \u003cr = invalid pointer\u003e\n\nFix this by ensuring icc_bw_lock is always held before manipulating\nicc_node::req_list. The additional places icc_bw_lock is held don\u0027t\nperform any memory allocations, so we should still be safe from the\noriginal lockdep splats that motivated the separate locks.\n\n[1] commit af42269c3523 (\"interconnect: Fix locking for runpm vs reclaim\")"
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    "cveId": "CVE-2024-27005",
    "datePublished": "2024-05-01T05:28:59.193Z",
    "dateReserved": "2024-02-19T14:20:24.207Z",
    "dateUpdated": "2024-08-02T00:21:05.951Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-27005\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-01T06:15:18.883\",\"lastModified\":\"2024-05-13T08:15:11.680\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ninterconnect: Don\u0027t access req_list while it\u0027s being manipulated\\n\\nThe icc_lock mutex was split into separate icc_lock and icc_bw_lock\\nmutexes in [1] to avoid lockdep splats. However, this didn\u0027t adequately\\nprotect access to icc_node::req_list.\\n\\nThe icc_set_bw() function will eventually iterate over req_list while\\nonly holding icc_bw_lock, but req_list can be modified while only\\nholding icc_lock. This causes races between icc_set_bw(), of_icc_get(),\\nand icc_put().\\n\\nExample A:\\n\\n  CPU0                               CPU1\\n  ----                               ----\\n  icc_set_bw(path_a)\\n    mutex_lock(\u0026icc_bw_lock);\\n                                     icc_put(path_b)\\n                                       mutex_lock(\u0026icc_lock);\\n    aggregate_requests()\\n      hlist_for_each_entry(r, ...\\n                                       hlist_del(...\\n        \u003cr = invalid pointer\u003e\\n\\nExample B:\\n\\n  CPU0                               CPU1\\n  ----                               ----\\n  icc_set_bw(path_a)\\n    mutex_lock(\u0026icc_bw_lock);\\n                                     path_b = of_icc_get()\\n                                       of_icc_get_by_index()\\n                                         mutex_lock(\u0026icc_lock);\\n                                         path_find()\\n                                           path_init()\\n    aggregate_requests()\\n      hlist_for_each_entry(r, ...\\n                                             hlist_add_head(...\\n        \u003cr = invalid pointer\u003e\\n\\nFix this by ensuring icc_bw_lock is always held before manipulating\\nicc_node::req_list. The additional places icc_bw_lock is held don\u0027t\\nperform any memory allocations, so we should still be safe from the\\noriginal lockdep splats that motivated the separate locks.\\n\\n[1] commit af42269c3523 (\\\"interconnect: Fix locking for runpm vs reclaim\\\")\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: interconexi\u00f3n: no acceder a req_list mientras se est\u00e1 manipulando. El mutex icc_lock se dividi\u00f3 en mutex icc_lock e icc_bw_lock separados en [1] para evitar s\u00edmbolos de bloqueo. Sin embargo, esto no protegi\u00f3 adecuadamente el acceso a icc_node::req_list. La funci\u00f3n icc_set_bw() eventualmente iterar\u00e1 sobre req_list mientras solo mantiene icc_bw_lock, pero req_list se puede modificar mientras solo mantiene icc_lock. Esto provoca ejecuci\u00f3ns entre icc_set_bw(), of_icc_get() e icc_put(). Ejemplo A: CPU0 CPU1 ---- ---- icc_set_bw(path_a) mutex_lock(\u0026amp;icc_bw_lock); icc_put(ruta_b) mutex_lock(\u0026amp;icc_lock); agregado_requests() hlist_for_each_entry(r, ... hlist_del(...  Ejemplo B: CPU0 CPU1 ---- ---- icc_set_bw(path_a) mutex_lock(\u0026amp;icc_bw_lock); path_b = of_icc_get() of_icc_get_by_index( ) mutex_lock(\u0026amp;icc_lock); path_find() path_init() agregado_requests() hlist_for_each_entry(r, ... hlist_add_head(...  Solucione este problema asegur\u00e1ndose de que icc_bw_lock siempre se mantenga antes de manipular icc_node::req_list. El adicional Los lugares donde se mantiene icc_bw_lock no realizan ninguna asignaci\u00f3n de memoria, por lo que a\u00fan deber\u00edamos estar a salvo de los s\u00edmbolos de bloqueo originales que motivaron los bloqueos separados [1] commit af42269c3523 (\\\"interconexi\u00f3n: arreglar el bloqueo para runpm vs reclaim\\\")\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4c65507121ea8e0b47fae6d2049c8688390d46b6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d0d04efa2e367921654b5106cc5c05e3757c2b42\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/de1bf25b6d771abdb52d43546cf57ad775fb68a1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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}


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