CVE-2024-44942 (GCVE-0-2024-44942)
Vulnerability from cvelistv5
Published
2024-08-26 11:20
Modified
2025-07-11 17:20
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on F2FS_INLINE_DATA flag in inode during GC syzbot reports a f2fs bug as below: ------------[ cut here ]------------ kernel BUG at fs/f2fs/inline.c:258! CPU: 1 PID: 34 Comm: kworker/u8:2 Not tainted 6.9.0-rc6-syzkaller-00012-g9e4bc4bcae01 #0 RIP: 0010:f2fs_write_inline_data+0x781/0x790 fs/f2fs/inline.c:258 Call Trace: f2fs_write_single_data_page+0xb65/0x1d60 fs/f2fs/data.c:2834 f2fs_write_cache_pages fs/f2fs/data.c:3133 [inline] __f2fs_write_data_pages fs/f2fs/data.c:3288 [inline] f2fs_write_data_pages+0x1efe/0x3a90 fs/f2fs/data.c:3315 do_writepages+0x35b/0x870 mm/page-writeback.c:2612 __writeback_single_inode+0x165/0x10b0 fs/fs-writeback.c:1650 writeback_sb_inodes+0x905/0x1260 fs/fs-writeback.c:1941 wb_writeback+0x457/0xce0 fs/fs-writeback.c:2117 wb_do_writeback fs/fs-writeback.c:2264 [inline] wb_workfn+0x410/0x1090 fs/fs-writeback.c:2304 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0xa12/0x17c0 kernel/workqueue.c:3335 worker_thread+0x86d/0xd70 kernel/workqueue.c:3416 kthread+0x2f2/0x390 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 The root cause is: inline_data inode can be fuzzed, so that there may be valid blkaddr in its direct node, once f2fs triggers background GC to migrate the block, it will hit f2fs_bug_on() during dirty page writeback. Let's add sanity check on F2FS_INLINE_DATA flag in inode during GC, so that, it can forbid migrating inline_data inode's data block for fixing.
References
Impacted products
Vendor Product Version
Linux Linux Version: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4
Version: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4
Version: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-44942\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-08-26T12:15:06.157\",\"lastModified\":\"2024-08-27T16:09:10.010\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nf2fs: fix to do sanity check on F2FS_INLINE_DATA flag in inode during GC\\n\\nsyzbot reports a f2fs bug as below:\\n\\n------------[ cut here ]------------\\nkernel BUG at fs/f2fs/inline.c:258!\\nCPU: 1 PID: 34 Comm: kworker/u8:2 Not tainted 6.9.0-rc6-syzkaller-00012-g9e4bc4bcae01 #0\\nRIP: 0010:f2fs_write_inline_data+0x781/0x790 fs/f2fs/inline.c:258\\nCall Trace:\\n f2fs_write_single_data_page+0xb65/0x1d60 fs/f2fs/data.c:2834\\n f2fs_write_cache_pages fs/f2fs/data.c:3133 [inline]\\n __f2fs_write_data_pages fs/f2fs/data.c:3288 [inline]\\n f2fs_write_data_pages+0x1efe/0x3a90 fs/f2fs/data.c:3315\\n do_writepages+0x35b/0x870 mm/page-writeback.c:2612\\n __writeback_single_inode+0x165/0x10b0 fs/fs-writeback.c:1650\\n writeback_sb_inodes+0x905/0x1260 fs/fs-writeback.c:1941\\n wb_writeback+0x457/0xce0 fs/fs-writeback.c:2117\\n wb_do_writeback fs/fs-writeback.c:2264 [inline]\\n wb_workfn+0x410/0x1090 fs/fs-writeback.c:2304\\n process_one_work kernel/workqueue.c:3254 [inline]\\n process_scheduled_works+0xa12/0x17c0 kernel/workqueue.c:3335\\n worker_thread+0x86d/0xd70 kernel/workqueue.c:3416\\n kthread+0x2f2/0x390 kernel/kthread.c:388\\n ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147\\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244\\n\\nThe root cause is: inline_data inode can be fuzzed, so that there may\\nbe valid blkaddr in its direct node, once f2fs triggers background GC\\nto migrate the block, it will hit f2fs_bug_on() during dirty page\\nwriteback.\\n\\nLet\u0027s add sanity check on F2FS_INLINE_DATA flag in inode during GC,\\nso that, it can forbid migrating inline_data inode\u0027s data block for\\nfixing.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: f2fs: correcci\u00f3n para realizar una verificaci\u00f3n de integridad en el indicador F2FS_INLINE_DATA en el inodo durante GC syzbot informa un error de f2fs como se muestra a continuaci\u00f3n: ------------[ cortar aqu\u00ed ] ------------ \u00a1ERROR del kernel en fs/f2fs/inline.c:258! CPU: 1 PID: 34 Comm: kworker/u8:2 No contaminado 6.9.0-rc6-syzkaller-00012-g9e4bc4bcae01 #0 RIP: 0010:f2fs_write_inline_data+0x781/0x790 fs/f2fs/inline.c:258 Seguimiento de llamadas: f2fs_write_single_data _p\u00e1gina +0xb65/0x1d60 fs/f2fs/data.c:2834 f2fs_write_cache_pages fs/f2fs/data.c:3133 [en l\u00ednea] __f2fs_write_data_pages fs/f2fs/data.c:3288 [en l\u00ednea] f2fs_write_data_pages+0x1efe/0x3a90 fs/f2 fs/datos. c:3315 do_writepages+0x35b/0x870 mm/page-writeback.c:2612 __writeback_single_inode+0x165/0x10b0 fs/fs-writeback.c:1650 writeback_sb_inodes+0x905/0x1260 fs/fs-writeback.c:1941 wb_writeback+0x457/ 0xce0 fs/fs-writeback.c:2117 wb_do_writeback fs/fs-writeback.c:2264 [en l\u00ednea] wb_workfn+0x410/0x1090 fs/fs-writeback.c:2304 Process_one_work kernel/workqueue.c:3254 [en l\u00ednea] Process_scheduled_works+0xa12 /0x17c0 kernel/workqueue.c:3335 trabajador_thread+0x86d/0xd70 kernel/workqueue.c:3416 kthread+0x2f2/0x390 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm +0x1a/0x30 arch/x86/entry/entry_64.S:244 La causa principal es: el inodo inline_data puede ser difuso, de modo que pueda haber un blkaddr v\u00e1lido en su nodo directo, una vez que f2fs activa el GC en segundo plano para migrar el bloque, lo har\u00e1 presione f2fs_bug_on() durante la reescritura de la p\u00e1gina sucia. Agreguemos una verificaci\u00f3n de cordura en el indicador F2FS_INLINE_DATA en el inodo durante la GC, de modo que pueda prohibir la migraci\u00f3n del bloque de datos del inodo inline_data para su reparaci\u00f3n.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"6.6.47\",\"matchCriteriaId\":\"CF4F8EA7-C643-4B9C-8E32-BD81930A5E8B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.10.6\",\"matchCriteriaId\":\"C1CDF130-CCA6-47F6-9718-8949BF4E05CC\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/26c07775fb5dc74351d1c3a2bc3cdf609b03e49f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ae00e6536a2dd54b64b39e9a39548870cf835745\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fc01008c92f40015aeeced94750855a7111b6929\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
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}


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  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.