{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfsnotify: clear PARENT_WATCHED flags lazily\n\nIn some setups directories can have many (usually negative) dentries.\nHence __fsnotify_update_child_dentry_flags() function can take a\nsignificant amount of time. Since the bulk of this function happens\nunder inode->i_lock this causes a significant contention on the lock\nwhen we remove the watch from the directory as the\n__fsnotify_update_child_dentry_flags() call from fsnotify_recalc_mask()\nraces with __fsnotify_update_child_dentry_flags() calls from\n__fsnotify_parent() happening on children. This can lead upto softlockup\nreports reported by users.\n\nFix the problem by calling fsnotify_update_children_dentry_flags() to\nset PARENT_WATCHED flags only when parent starts watching children.\n\nWhen parent stops watching children, clear false positive PARENT_WATCHED\nflags lazily in __fsnotify_parent() for each accessed child."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "fs/notify/fsnotify.c",
                  "fs/notify/fsnotify.h",
                  "fs/notify/mark.c",
                  "include/linux/fsnotify_backend.h"
               ],
               "versions": [
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "3f3ef1d9f66b",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "f9a48bc3dd90",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "d8c42405fc35",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "fc1b1e135c3f",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "7ef1d2e240c3",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "172e422ffea2",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "fs/notify/fsnotify.c",
                  "fs/notify/fsnotify.h",
                  "fs/notify/mark.c",
                  "include/linux/fsnotify_backend.h"
               ],
               "versions": [
                  {
                     "version": "5.10.226",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.167",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.109",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.50",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.10.9",
                     "lessThanOrEqual": "6.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.11",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/3f3ef1d9f66b93913ce2171120d9226b55acd41d"
            },
            {
               "url": "https://git.kernel.org/stable/c/f9a48bc3dd9099935751458a5bbbea4b7c28abc8"
            },
            {
               "url": "https://git.kernel.org/stable/c/d8c42405fc3507cc43ba7e4986a773c3fc633f6e"
            },
            {
               "url": "https://git.kernel.org/stable/c/fc1b1e135c3f72382f792e6c319fc088d5523ad5"
            },
            {
               "url": "https://git.kernel.org/stable/c/7ef1d2e240c32b1f337a37232d037b07e3919e1a"
            },
            {
               "url": "https://git.kernel.org/stable/c/172e422ffea20a89bfdc672741c1aad6fbb5044e"
            }
         ],
         "title": "fsnotify: clear PARENT_WATCHED flags lazily",
         "x_generator": {
            "engine": "bippy-c9c4e1df01b2"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-47660",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}