| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvfs: fix race between evice_inodes() and find_inode()&iput()\n\nHi, all\n\nRecently I noticed a bug[1] in btrfs, after digged it into\nand I believe it'a race in vfs.\n\nLet's assume there's a inode (ie ino 261) with i_count 1 is\ncalled by iput(), and there's a concurrent thread calling\ngeneric_shutdown_super().\n\ncpu0: cpu1:\niput() // i_count is 1\n ->spin_lock(inode)\n ->dec i_count to 0\n ->iput_final() generic_shutdown_super()\n ->__inode_add_lru() ->evict_inodes()\n // cause some reason[2] ->if (atomic_read(inode->i_count)) continue;\n // return before // inode 261 passed the above check\n // list_lru_add_obj() // and then schedule out\n ->spin_unlock()\n// note here: the inode 261\n// was still at sb list and hash list,\n// and I_FREEING|I_WILL_FREE was not been set\n\nbtrfs_iget()\n // after some function calls\n ->find_inode()\n // found the above inode 261\n ->spin_lock(inode)\n // check I_FREEING|I_WILL_FREE\n // and passed\n ->__iget()\n ->spin_unlock(inode) // schedule back\n ->spin_lock(inode)\n // check (I_NEW|I_FREEING|I_WILL_FREE) flags,\n // passed and set I_FREEING\niput() ->spin_unlock(inode)\n ->spin_lock(inode)\t\t\t ->evict()\n // dec i_count to 0\n ->iput_final()\n ->spin_unlock()\n ->evict()\n\nNow, we have two threads simultaneously evicting\nthe same inode, which may trigger the BUG(inode->i_state & I_CLEAR)\nstatement both within clear_inode() and iput().\n\nTo fix the bug, recheck the inode->i_count after holding i_lock.\nBecause in the most scenarios, the first check is valid, and\nthe overhead of spin_lock() can be reduced.\n\nIf there is any misunderstanding, please let me know, thanks.\n\n[1]: https://lore.kernel.org/linux-btrfs/000000000000eabe1d0619c48986@google.com/\n[2]: The reason might be 1. SB_ACTIVE was removed or 2. mapping_shrinkable()\nreturn false when I reproduced the bug." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "fs/inode.c" |
| ], |
| "versions": [ |
| { |
| "version": "63997e98a3be68d7cec806d22bf9b02b2e1daabb", |
| "lessThan": "6cc13a80a26e6b48f78c725c01b91987d61563ef", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "63997e98a3be68d7cec806d22bf9b02b2e1daabb", |
| "lessThan": "489faddb1ae75b0e1a741fe5ca2542a2b5e794a5", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "63997e98a3be68d7cec806d22bf9b02b2e1daabb", |
| "lessThan": "47a68c75052a660e4c37de41e321582ec9496195", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "63997e98a3be68d7cec806d22bf9b02b2e1daabb", |
| "lessThan": "3721a69403291e2514d13a7c3af50a006ea1153b", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "63997e98a3be68d7cec806d22bf9b02b2e1daabb", |
| "lessThan": "540fb13120c9eab3ef203f90c00c8e69f37449d1", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "63997e98a3be68d7cec806d22bf9b02b2e1daabb", |
| "lessThan": "0eed942bc65de1f93eca7bda51344290f9c573bb", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "63997e98a3be68d7cec806d22bf9b02b2e1daabb", |
| "lessThan": "0f8a5b6d0dafa4f533ac82e98f8b812073a7c9d1", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "63997e98a3be68d7cec806d22bf9b02b2e1daabb", |
| "lessThan": "6c857fb12b9137fee574443385d53914356bbe11", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "63997e98a3be68d7cec806d22bf9b02b2e1daabb", |
| "lessThan": "88b1afbf0f6b221f6c5bb66cc80cd3b38d696687", |
| "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/inode.c" |
| ], |
| "versions": [ |
| { |
| "version": "2.6.37", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "2.6.37", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.19.323", |
| "lessThanOrEqual": "4.19.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.4.285", |
| "lessThanOrEqual": "5.4.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.10.227", |
| "lessThanOrEqual": "5.10.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.15.168", |
| "lessThanOrEqual": "5.15.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.1.113", |
| "lessThanOrEqual": "6.1.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.6.54", |
| "lessThanOrEqual": "6.6.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.10.13", |
| "lessThanOrEqual": "6.10.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.11.2", |
| "lessThanOrEqual": "6.11.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.12", |
| "lessThanOrEqual": "*", |
| "status": "unaffected", |
| "versionType": "original_commit_for_fix" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "2.6.37", |
| "versionEndExcluding": "4.19.323" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "2.6.37", |
| "versionEndExcluding": "5.4.285" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "2.6.37", |
| "versionEndExcluding": "5.10.227" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "2.6.37", |
| "versionEndExcluding": "5.15.168" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "2.6.37", |
| "versionEndExcluding": "6.1.113" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "2.6.37", |
| "versionEndExcluding": "6.6.54" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "2.6.37", |
| "versionEndExcluding": "6.10.13" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "2.6.37", |
| "versionEndExcluding": "6.11.2" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "2.6.37", |
| "versionEndExcluding": "6.12" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/6cc13a80a26e6b48f78c725c01b91987d61563ef" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/489faddb1ae75b0e1a741fe5ca2542a2b5e794a5" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/47a68c75052a660e4c37de41e321582ec9496195" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/3721a69403291e2514d13a7c3af50a006ea1153b" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/540fb13120c9eab3ef203f90c00c8e69f37449d1" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/0eed942bc65de1f93eca7bda51344290f9c573bb" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/0f8a5b6d0dafa4f533ac82e98f8b812073a7c9d1" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/6c857fb12b9137fee574443385d53914356bbe11" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/88b1afbf0f6b221f6c5bb66cc80cd3b38d696687" |
| } |
| ], |
| "title": "vfs: fix race between evice_inodes() and find_inode()&iput()", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2024-47679", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
