| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/memory-failure: make sure wait for page writeback in memory_failure\n\nOur syzkaller trigger the \"BUG_ON(!list_empty(&inode->i_wb_list))\" in\nclear_inode:\n\n kernel BUG at fs/inode.c:519!\n Internal error: Oops - BUG: 0 [#1] SMP\n Modules linked in:\n Process syz-executor.0 (pid: 249, stack limit = 0x00000000a12409d7)\n CPU: 1 PID: 249 Comm: syz-executor.0 Not tainted 4.19.95\n Hardware name: linux,dummy-virt (DT)\n pstate: 80000005 (Nzcv daif -PAN -UAO)\n pc : clear_inode+0x280/0x2a8\n lr : clear_inode+0x280/0x2a8\n Call trace:\n clear_inode+0x280/0x2a8\n ext4_clear_inode+0x38/0xe8\n ext4_free_inode+0x130/0xc68\n ext4_evict_inode+0xb20/0xcb8\n evict+0x1a8/0x3c0\n iput+0x344/0x460\n do_unlinkat+0x260/0x410\n __arm64_sys_unlinkat+0x6c/0xc0\n el0_svc_common+0xdc/0x3b0\n el0_svc_handler+0xf8/0x160\n el0_svc+0x10/0x218\n Kernel panic - not syncing: Fatal exception\n\nA crash dump of this problem show that someone called __munlock_pagevec\nto clear page LRU without lock_page: do_mmap -> mmap_region -> do_munmap\n-> munlock_vma_pages_range -> __munlock_pagevec.\n\nAs a result memory_failure will call identify_page_state without\nwait_on_page_writeback. And after truncate_error_page clear the mapping\nof this page. end_page_writeback won't call sb_clear_inode_writeback to\nclear inode->i_wb_list. That will trigger BUG_ON in clear_inode!\n\nFix it by checking PageWriteback too to help determine should we skip\nwait_on_page_writeback." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "mm/memory-failure.c" |
| ], |
| "versions": [ |
| { |
| "version": "0bc1f8b0682caa39f45ce1e0228ebf43acb46111", |
| "lessThan": "d05267fd27a5c4f54e06daefa3035995d765ca0c", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "0bc1f8b0682caa39f45ce1e0228ebf43acb46111", |
| "lessThan": "6d210d547adc2218ef8b5bcf23518c5f2f1fd872", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "0bc1f8b0682caa39f45ce1e0228ebf43acb46111", |
| "lessThan": "566345aaabac853aa866f53a219c4b02a6beb527", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "0bc1f8b0682caa39f45ce1e0228ebf43acb46111", |
| "lessThan": "9e379da727a7a031be9b877cde7b9c34a0fb8306", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "0bc1f8b0682caa39f45ce1e0228ebf43acb46111", |
| "lessThan": "28788dc5c70597395b6b451dae4549bbaa8e2c56", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "0bc1f8b0682caa39f45ce1e0228ebf43acb46111", |
| "lessThan": "e8675d291ac007e1c636870db880f837a9ea112a", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "mm/memory-failure.c" |
| ], |
| "versions": [ |
| { |
| "version": "3.16", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "3.16", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.14.238", |
| "lessThanOrEqual": "4.14.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.19.196", |
| "lessThanOrEqual": "4.19.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.4.128", |
| "lessThanOrEqual": "5.4.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.10.46", |
| "lessThanOrEqual": "5.10.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.12.13", |
| "lessThanOrEqual": "5.12.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.13", |
| "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": "3.16", |
| "versionEndExcluding": "4.14.238" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "3.16", |
| "versionEndExcluding": "4.19.196" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "3.16", |
| "versionEndExcluding": "5.4.128" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "3.16", |
| "versionEndExcluding": "5.10.46" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "3.16", |
| "versionEndExcluding": "5.12.13" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "3.16", |
| "versionEndExcluding": "5.13" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/d05267fd27a5c4f54e06daefa3035995d765ca0c" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/6d210d547adc2218ef8b5bcf23518c5f2f1fd872" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/566345aaabac853aa866f53a219c4b02a6beb527" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/9e379da727a7a031be9b877cde7b9c34a0fb8306" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/28788dc5c70597395b6b451dae4549bbaa8e2c56" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/e8675d291ac007e1c636870db880f837a9ea112a" |
| } |
| ], |
| "title": "mm/memory-failure: make sure wait for page writeback in memory_failure", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2021-47256", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
