{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ninterconnect: Don't access req_list while it's 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't 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(&icc_bw_lock);\n                                     icc_put(path_b)\n                                       mutex_lock(&icc_lock);\n    aggregate_requests()\n      hlist_for_each_entry(r, ...\n                                       hlist_del(...\n        <r = invalid pointer>\n\nExample B:\n\n  CPU0                               CPU1\n  ----                               ----\n  icc_set_bw(path_a)\n    mutex_lock(&icc_bw_lock);\n                                     path_b = of_icc_get()\n                                       of_icc_get_by_index()\n                                         mutex_lock(&icc_lock);\n                                         path_find()\n                                           path_init()\n    aggregate_requests()\n      hlist_for_each_entry(r, ...\n                                             hlist_add_head(...\n        <r = invalid pointer>\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't\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\")"
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/interconnect/core.c"
               ],
               "versions": [
                  {
                     "version": "af42269c3523",
                     "lessThan": "d0d04efa2e36",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "af42269c3523",
                     "lessThan": "4c65507121ea",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "af42269c3523",
                     "lessThan": "de1bf25b6d77",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/interconnect/core.c"
               ],
               "versions": [
                  {
                     "version": "6.6",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "6.6",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.29",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.8.8",
                     "lessThanOrEqual": "6.8.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.9",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/d0d04efa2e367921654b5106cc5c05e3757c2b42"
            },
            {
               "url": "https://git.kernel.org/stable/c/4c65507121ea8e0b47fae6d2049c8688390d46b6"
            },
            {
               "url": "https://git.kernel.org/stable/c/de1bf25b6d771abdb52d43546cf57ad775fb68a1"
            }
         ],
         "title": "interconnect: Don't access req_list while it's being manipulated",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-27005",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}