cve-2022-48897
Vulnerability from cvelistv5
Published
2024-08-21 06:10
Modified
2024-12-19 08:10
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: arm64/mm: fix incorrect file_map_count for invalid pmd The page table check trigger BUG_ON() unexpectedly when split hugepage: ------------[ cut here ]------------ kernel BUG at mm/page_table_check.c:119! Internal error: Oops - BUG: 00000000f2000800 [#1] SMP Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 7 PID: 210 Comm: transhuge-stres Not tainted 6.1.0-rc3+ #748 Hardware name: linux,dummy-virt (DT) pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : page_table_check_set.isra.0+0x398/0x468 lr : page_table_check_set.isra.0+0x1c0/0x468 [...] Call trace: page_table_check_set.isra.0+0x398/0x468 __page_table_check_pte_set+0x160/0x1c0 __split_huge_pmd_locked+0x900/0x1648 __split_huge_pmd+0x28c/0x3b8 unmap_page_range+0x428/0x858 unmap_single_vma+0xf4/0x1c8 zap_page_range+0x2b0/0x410 madvise_vma_behavior+0xc44/0xe78 do_madvise+0x280/0x698 __arm64_sys_madvise+0x90/0xe8 invoke_syscall.constprop.0+0xdc/0x1d8 do_el0_svc+0xf4/0x3f8 el0_svc+0x58/0x120 el0t_64_sync_handler+0xb8/0xc0 el0t_64_sync+0x19c/0x1a0 [...] On arm64, pmd_leaf() will return true even if the pmd is invalid due to pmd_present_invalid() check. So in pmdp_invalidate() the file_map_count will not only decrease once but also increase once. Then in set_pte_at(), the file_map_count increase again, and so trigger BUG_ON() unexpectedly. Add !pmd_present_invalid() check in pmd_user_accessible_page() to fix the problem.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/21e5eca0ac9046da9918a919bc92b7b5a78d27e7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/74c2f81054510d45b813548cb0a1c4ebf87cdd5fPatch
Impacted products
Vendor Product Version
Linux Linux Version: 42b2547137f5c974bb1bfd657c869fe96b96d86f
Version: 42b2547137f5c974bb1bfd657c869fe96b96d86f
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   Linux Linux Version: 5.19
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{
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            metrics: [
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                     content: {
                        id: "CVE-2022-48897",
                        options: [
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                              Exploitation: "none",
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                              Automatable: "no",
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                        role: "CISA Coordinator",
                        timestamp: "2024-09-10T16:04:02.667738Z",
                        version: "2.0.3",
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               orgId: "134c704f-9b21-4f2e-91b3-4a467353bcc0",
               shortName: "CISA-ADP",
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            title: "CISA ADP Vulnrichment",
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      cna: {
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               product: "Linux",
               programFiles: [
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               lang: "en",
               value: "In the Linux kernel, the following vulnerability has been resolved:\n\narm64/mm: fix incorrect file_map_count for invalid pmd\n\nThe page table check trigger BUG_ON() unexpectedly when split hugepage:\n\n ------------[ cut here ]------------\n kernel BUG at mm/page_table_check.c:119!\n Internal error: Oops - BUG: 00000000f2000800 [#1] SMP\n Dumping ftrace buffer:\n    (ftrace buffer empty)\n Modules linked in:\n CPU: 7 PID: 210 Comm: transhuge-stres Not tainted 6.1.0-rc3+ #748\n Hardware name: linux,dummy-virt (DT)\n pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : page_table_check_set.isra.0+0x398/0x468\n lr : page_table_check_set.isra.0+0x1c0/0x468\n[...]\n Call trace:\n  page_table_check_set.isra.0+0x398/0x468\n  __page_table_check_pte_set+0x160/0x1c0\n  __split_huge_pmd_locked+0x900/0x1648\n  __split_huge_pmd+0x28c/0x3b8\n  unmap_page_range+0x428/0x858\n  unmap_single_vma+0xf4/0x1c8\n  zap_page_range+0x2b0/0x410\n  madvise_vma_behavior+0xc44/0xe78\n  do_madvise+0x280/0x698\n  __arm64_sys_madvise+0x90/0xe8\n  invoke_syscall.constprop.0+0xdc/0x1d8\n  do_el0_svc+0xf4/0x3f8\n  el0_svc+0x58/0x120\n  el0t_64_sync_handler+0xb8/0xc0\n  el0t_64_sync+0x19c/0x1a0\n[...]\n\nOn arm64, pmd_leaf() will return true even if the pmd is invalid due to\npmd_present_invalid() check. So in pmdp_invalidate() the file_map_count\nwill not only decrease once but also increase once. Then in set_pte_at(),\nthe file_map_count increase again, and so trigger BUG_ON() unexpectedly.\n\nAdd !pmd_present_invalid() check in pmd_user_accessible_page() to fix the\nproblem.",
            },
         ],
         providerMetadata: {
            dateUpdated: "2024-12-19T08:10:05.463Z",
            orgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            shortName: "Linux",
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         references: [
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               url: "https://git.kernel.org/stable/c/21e5eca0ac9046da9918a919bc92b7b5a78d27e7",
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            {
               url: "https://git.kernel.org/stable/c/74c2f81054510d45b813548cb0a1c4ebf87cdd5f",
            },
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         title: "arm64/mm: fix incorrect file_map_count for invalid pmd",
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   cveMetadata: {
      assignerOrgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      assignerShortName: "Linux",
      cveId: "CVE-2022-48897",
      datePublished: "2024-08-21T06:10:29.785Z",
      dateReserved: "2024-08-21T06:06:23.291Z",
      dateUpdated: "2024-12-19T08:10:05.463Z",
      state: "PUBLISHED",
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   dataType: "CVE_RECORD",
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      nvd: "{\"cve\":{\"id\":\"CVE-2022-48897\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-08-21T07:15:05.693\",\"lastModified\":\"2024-09-11T16:10:40.843\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\narm64/mm: fix incorrect file_map_count for invalid pmd\\n\\nThe page table check trigger BUG_ON() unexpectedly when split hugepage:\\n\\n ------------[ cut here ]------------\\n kernel BUG at mm/page_table_check.c:119!\\n Internal error: Oops - BUG: 00000000f2000800 [#1] SMP\\n Dumping ftrace buffer:\\n    (ftrace buffer empty)\\n Modules linked in:\\n CPU: 7 PID: 210 Comm: transhuge-stres Not tainted 6.1.0-rc3+ #748\\n Hardware name: linux,dummy-virt (DT)\\n pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\\n pc : page_table_check_set.isra.0+0x398/0x468\\n lr : page_table_check_set.isra.0+0x1c0/0x468\\n[...]\\n Call trace:\\n  page_table_check_set.isra.0+0x398/0x468\\n  __page_table_check_pte_set+0x160/0x1c0\\n  __split_huge_pmd_locked+0x900/0x1648\\n  __split_huge_pmd+0x28c/0x3b8\\n  unmap_page_range+0x428/0x858\\n  unmap_single_vma+0xf4/0x1c8\\n  zap_page_range+0x2b0/0x410\\n  madvise_vma_behavior+0xc44/0xe78\\n  do_madvise+0x280/0x698\\n  __arm64_sys_madvise+0x90/0xe8\\n  invoke_syscall.constprop.0+0xdc/0x1d8\\n  do_el0_svc+0xf4/0x3f8\\n  el0_svc+0x58/0x120\\n  el0t_64_sync_handler+0xb8/0xc0\\n  el0t_64_sync+0x19c/0x1a0\\n[...]\\n\\nOn arm64, pmd_leaf() will return true even if the pmd is invalid due to\\npmd_present_invalid() check. So in pmdp_invalidate() the file_map_count\\nwill not only decrease once but also increase once. Then in set_pte_at(),\\nthe file_map_count increase again, and so trigger BUG_ON() unexpectedly.\\n\\nAdd !pmd_present_invalid() check in pmd_user_accessible_page() to fix the\\nproblem.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvió la siguiente vulnerabilidad: arm64/mm: corrige file_map_count incorrecto para pmd no válido. La verificación de la tabla de páginas activa BUG_ON() inesperadamente cuando se divide una página enorme: ------------[ cortar aquí ]------------ ¡ERROR del kernel en mm/page_table_check.c:119! Error interno: Ups - ERROR: 00000000f2000800 [#1] SMP Dumping ftrace buffer: (ftrace buffer vacío) Módulos vinculados en: CPU: 7 PID: 210 Comm: transhuge-stres No contaminado 6.1.0-rc3+ #748 Nombre de hardware: linux ,dummy-virt (DT) pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc: page_table_check_set.isra.0+0x398/0x468 lr: page_table_check_set.isra.0+0x1c0/0x468 [...] Rastreo de llamadas: page_table_check_set.isra.0+0x398/0x468 __page_table_check_pte_set+0x160/0x1c0 __split_huge_pmd_locked+0x900/0x1648 __split_huge_pmd+0x28c/0x3b8 unmap_page_range+0x428/0x858 single_vma+0xf4/0x1c8 zap_page_range+0x2b0/0x410 madvise_vma_behavior+0xc44 /0xe78 do_madvise+0x280/0x698 __arm64_sys_madvise+0x90/0xe8 invoke_syscall.constprop.0+0xdc/0x1d8 do_el0_svc+0xf4/0x3f8 el0_svc+0x58/0x120 el0t_64_sync_handler+0x b8/0xc0 el0t_64_sync+0x19c/0x1a0 [...] En arm64, pmd_leaf () devolverá verdadero incluso si el pmd no es válido debido a la verificación pmd_present_invalid(). Entonces, en pmdp_invalidate() file_map_count no solo disminuirá una vez sino que también aumentará una vez. Luego, en set_pte_at(), file_map_count aumenta nuevamente y, por lo tanto, activa BUG_ON() inesperadamente. Agregue !pmd_present_invalid() check in pmd_user_accessible_page() para solucionar el problema.\"}],\"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:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"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:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.19\",\"versionEndExcluding\":\"6.1.7\",\"matchCriteriaId\":\"A3B4D9E4-9005-47B1-B0C1-FFC9874D6FF6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"FF501633-2F44-4913-A8EE-B021929F49F6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"2BDA597B-CAC1-4DF0-86F0-42E142C654E9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"725C78C9-12CE-406F-ABE8-0813A01D66E8\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/21e5eca0ac9046da9918a919bc92b7b5a78d27e7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/74c2f81054510d45b813548cb0a1c4ebf87cdd5f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
      vulnrichment: {
         containers: "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-48897\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T16:04:02.667738Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:17.532Z\"}}], \"cna\": {\"title\": \"arm64/mm: fix incorrect file_map_count for invalid pmd\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"42b2547137f5\", \"lessThan\": \"21e5eca0ac90\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"42b2547137f5\", \"lessThan\": \"74c2f8105451\", \"versionType\": \"git\"}], \"programFiles\": [\"arch/arm64/include/asm/pgtable.h\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.19\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.19\", \"versionType\": \"custom\"}, {\"status\": \"unaffected\", \"version\": \"6.1.7\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.2\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"arch/arm64/include/asm/pgtable.h\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/21e5eca0ac9046da9918a919bc92b7b5a78d27e7\"}, {\"url\": \"https://git.kernel.org/stable/c/74c2f81054510d45b813548cb0a1c4ebf87cdd5f\"}], \"x_generator\": {\"engine\": \"bippy-c9c4e1df01b2\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\narm64/mm: fix incorrect file_map_count for invalid pmd\\n\\nThe page table check trigger BUG_ON() unexpectedly when split hugepage:\\n\\n ------------[ cut here ]------------\\n kernel BUG at mm/page_table_check.c:119!\\n Internal error: Oops - BUG: 00000000f2000800 [#1] SMP\\n Dumping ftrace buffer:\\n    (ftrace buffer empty)\\n Modules linked in:\\n CPU: 7 PID: 210 Comm: transhuge-stres Not tainted 6.1.0-rc3+ #748\\n Hardware name: linux,dummy-virt (DT)\\n pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\\n pc : page_table_check_set.isra.0+0x398/0x468\\n lr : page_table_check_set.isra.0+0x1c0/0x468\\n[...]\\n Call trace:\\n  page_table_check_set.isra.0+0x398/0x468\\n  __page_table_check_pte_set+0x160/0x1c0\\n  __split_huge_pmd_locked+0x900/0x1648\\n  __split_huge_pmd+0x28c/0x3b8\\n  unmap_page_range+0x428/0x858\\n  unmap_single_vma+0xf4/0x1c8\\n  zap_page_range+0x2b0/0x410\\n  madvise_vma_behavior+0xc44/0xe78\\n  do_madvise+0x280/0x698\\n  __arm64_sys_madvise+0x90/0xe8\\n  invoke_syscall.constprop.0+0xdc/0x1d8\\n  do_el0_svc+0xf4/0x3f8\\n  el0_svc+0x58/0x120\\n  el0t_64_sync_handler+0xb8/0xc0\\n  el0t_64_sync+0x19c/0x1a0\\n[...]\\n\\nOn arm64, pmd_leaf() will return true even if the pmd is invalid due to\\npmd_present_invalid() check. So in pmdp_invalidate() the file_map_count\\nwill not only decrease once but also increase once. Then in set_pte_at(),\\nthe file_map_count increase again, and so trigger BUG_ON() unexpectedly.\\n\\nAdd !pmd_present_invalid() check in pmd_user_accessible_page() to fix the\\nproblem.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-08-21T06:10:29.785Z\"}}}",
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}


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