CVE-2025-21907 (GCVE-0-2025-21907)
Vulnerability from cvelistv5
Published
2025-04-01 15:40
Modified
2025-05-04 13:06
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mm: memory-failure: update ttu flag inside unmap_poisoned_folio Patch series "mm: memory_failure: unmap poisoned folio during migrate properly", v3. Fix two bugs during folio migration if the folio is poisoned. This patch (of 3): Commit 6da6b1d4a7df ("mm/hwpoison: convert TTU_IGNORE_HWPOISON to TTU_HWPOISON") introduce TTU_HWPOISON to replace TTU_IGNORE_HWPOISON in order to stop send SIGBUS signal when accessing an error page after a memory error on a clean folio. However during page migration, anon folio must be set with TTU_HWPOISON during unmap_*(). For pagecache we need some policy just like the one in hwpoison_user_mappings to set this flag. So move this policy from hwpoison_user_mappings to unmap_poisoned_folio to handle this warning properly. Warning will be produced during unamp poison folio with the following log: ------------[ cut here ]------------ WARNING: CPU: 1 PID: 365 at mm/rmap.c:1847 try_to_unmap_one+0x8fc/0xd3c Modules linked in: CPU: 1 UID: 0 PID: 365 Comm: bash Tainted: G W 6.13.0-rc1-00018-gacdb4bbda7ab #42 Tainted: [W]=WARN Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015 pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : try_to_unmap_one+0x8fc/0xd3c lr : try_to_unmap_one+0x3dc/0xd3c Call trace: try_to_unmap_one+0x8fc/0xd3c (P) try_to_unmap_one+0x3dc/0xd3c (L) rmap_walk_anon+0xdc/0x1f8 rmap_walk+0x3c/0x58 try_to_unmap+0x88/0x90 unmap_poisoned_folio+0x30/0xa8 do_migrate_range+0x4a0/0x568 offline_pages+0x5a4/0x670 memory_block_action+0x17c/0x374 memory_subsys_offline+0x3c/0x78 device_offline+0xa4/0xd0 state_store+0x8c/0xf0 dev_attr_store+0x18/0x2c sysfs_kf_write+0x44/0x54 kernfs_fop_write_iter+0x118/0x1a8 vfs_write+0x3a8/0x4bc ksys_write+0x6c/0xf8 __arm64_sys_write+0x1c/0x28 invoke_syscall+0x44/0x100 el0_svc_common.constprop.0+0x40/0xe0 do_el0_svc+0x1c/0x28 el0_svc+0x30/0xd0 el0t_64_sync_handler+0xc8/0xcc el0t_64_sync+0x198/0x19c ---[ end trace 0000000000000000 ]--- [mawupeng1@huawei.com: unmap_poisoned_folio(): remove shadowed local `mapping', per Miaohe]
References
Impacted products
Vendor Product Version
Linux Linux Version: 6da6b1d4a7df8c35770186b53ef65d388398e139
Version: 6da6b1d4a7df8c35770186b53ef65d388398e139
Version: 6da6b1d4a7df8c35770186b53ef65d388398e139
Version: deab8114fb67dcb0e6293b665c3c7083fbadff17
Version: 6dcf132fe236045bd7f50c008660ea086d09af1f
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/internal.h",
            "mm/memory-failure.c",
            "mm/memory_hotplug.c"
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            "mm/memory-failure.c",
            "mm/memory_hotplug.c"
          ],
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          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "6.3"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.12.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
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                  "vulnerable": true
                },
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm: memory-failure: update ttu flag inside unmap_poisoned_folio\n\nPatch series \"mm: memory_failure: unmap poisoned folio during migrate\nproperly\", v3.\n\nFix two bugs during folio migration if the folio is poisoned.\n\n\nThis patch (of 3):\n\nCommit 6da6b1d4a7df (\"mm/hwpoison: convert TTU_IGNORE_HWPOISON to\nTTU_HWPOISON\") introduce TTU_HWPOISON to replace TTU_IGNORE_HWPOISON in\norder to stop send SIGBUS signal when accessing an error page after a\nmemory error on a clean folio.  However during page migration, anon folio\nmust be set with TTU_HWPOISON during unmap_*().  For pagecache we need\nsome policy just like the one in hwpoison_user_mappings to set this flag. \nSo move this policy from hwpoison_user_mappings to unmap_poisoned_folio to\nhandle this warning properly.\n\nWarning will be produced during unamp poison folio with the following log:\n\n  ------------[ cut here ]------------\n  WARNING: CPU: 1 PID: 365 at mm/rmap.c:1847 try_to_unmap_one+0x8fc/0xd3c\n  Modules linked in:\n  CPU: 1 UID: 0 PID: 365 Comm: bash Tainted: G        W          6.13.0-rc1-00018-gacdb4bbda7ab #42\n  Tainted: [W]=WARN\n  Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015\n  pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n  pc : try_to_unmap_one+0x8fc/0xd3c\n  lr : try_to_unmap_one+0x3dc/0xd3c\n  Call trace:\n   try_to_unmap_one+0x8fc/0xd3c (P)\n   try_to_unmap_one+0x3dc/0xd3c (L)\n   rmap_walk_anon+0xdc/0x1f8\n   rmap_walk+0x3c/0x58\n   try_to_unmap+0x88/0x90\n   unmap_poisoned_folio+0x30/0xa8\n   do_migrate_range+0x4a0/0x568\n   offline_pages+0x5a4/0x670\n   memory_block_action+0x17c/0x374\n   memory_subsys_offline+0x3c/0x78\n   device_offline+0xa4/0xd0\n   state_store+0x8c/0xf0\n   dev_attr_store+0x18/0x2c\n   sysfs_kf_write+0x44/0x54\n   kernfs_fop_write_iter+0x118/0x1a8\n   vfs_write+0x3a8/0x4bc\n   ksys_write+0x6c/0xf8\n   __arm64_sys_write+0x1c/0x28\n   invoke_syscall+0x44/0x100\n   el0_svc_common.constprop.0+0x40/0xe0\n   do_el0_svc+0x1c/0x28\n   el0_svc+0x30/0xd0\n   el0t_64_sync_handler+0xc8/0xcc\n   el0t_64_sync+0x198/0x19c\n  ---[ end trace 0000000000000000 ]---\n\n[mawupeng1@huawei.com: unmap_poisoned_folio(): remove shadowed local `mapping\u0027, per Miaohe]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T13:06:44.118Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/608cc7deb428f1122ed426060233622ebf667b6e"
        },
        {
          "url": "https://git.kernel.org/stable/c/425c12c076e6fc6b2cb04b9f960319d31dcabc76"
        },
        {
          "url": "https://git.kernel.org/stable/c/b81679b1633aa43c0d973adfa816d78c1ed0d032"
        }
      ],
      "title": "mm: memory-failure: update ttu flag inside unmap_poisoned_folio",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21907",
    "datePublished": "2025-04-01T15:40:47.576Z",
    "dateReserved": "2024-12-29T08:45:45.786Z",
    "dateUpdated": "2025-05-04T13:06:44.118Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-21907\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-04-01T16:15:21.217\",\"lastModified\":\"2025-10-31T17:59:19.370\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmm: memory-failure: update ttu flag inside unmap_poisoned_folio\\n\\nPatch series \\\"mm: memory_failure: unmap poisoned folio during migrate\\nproperly\\\", v3.\\n\\nFix two bugs during folio migration if the folio is poisoned.\\n\\n\\nThis patch (of 3):\\n\\nCommit 6da6b1d4a7df (\\\"mm/hwpoison: convert TTU_IGNORE_HWPOISON to\\nTTU_HWPOISON\\\") introduce TTU_HWPOISON to replace TTU_IGNORE_HWPOISON in\\norder to stop send SIGBUS signal when accessing an error page after a\\nmemory error on a clean folio.  However during page migration, anon folio\\nmust be set with TTU_HWPOISON during unmap_*().  For pagecache we need\\nsome policy just like the one in hwpoison_user_mappings to set this flag. \\nSo move this policy from hwpoison_user_mappings to unmap_poisoned_folio to\\nhandle this warning properly.\\n\\nWarning will be produced during unamp poison folio with the following log:\\n\\n  ------------[ cut here ]------------\\n  WARNING: CPU: 1 PID: 365 at mm/rmap.c:1847 try_to_unmap_one+0x8fc/0xd3c\\n  Modules linked in:\\n  CPU: 1 UID: 0 PID: 365 Comm: bash Tainted: G        W          6.13.0-rc1-00018-gacdb4bbda7ab #42\\n  Tainted: [W]=WARN\\n  Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015\\n  pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\\n  pc : try_to_unmap_one+0x8fc/0xd3c\\n  lr : try_to_unmap_one+0x3dc/0xd3c\\n  Call trace:\\n   try_to_unmap_one+0x8fc/0xd3c (P)\\n   try_to_unmap_one+0x3dc/0xd3c (L)\\n   rmap_walk_anon+0xdc/0x1f8\\n   rmap_walk+0x3c/0x58\\n   try_to_unmap+0x88/0x90\\n   unmap_poisoned_folio+0x30/0xa8\\n   do_migrate_range+0x4a0/0x568\\n   offline_pages+0x5a4/0x670\\n   memory_block_action+0x17c/0x374\\n   memory_subsys_offline+0x3c/0x78\\n   device_offline+0xa4/0xd0\\n   state_store+0x8c/0xf0\\n   dev_attr_store+0x18/0x2c\\n   sysfs_kf_write+0x44/0x54\\n   kernfs_fop_write_iter+0x118/0x1a8\\n   vfs_write+0x3a8/0x4bc\\n   ksys_write+0x6c/0xf8\\n   __arm64_sys_write+0x1c/0x28\\n   invoke_syscall+0x44/0x100\\n   el0_svc_common.constprop.0+0x40/0xe0\\n   do_el0_svc+0x1c/0x28\\n   el0_svc+0x30/0xd0\\n   el0t_64_sync_handler+0xc8/0xcc\\n   el0t_64_sync+0x198/0x19c\\n  ---[ end trace 0000000000000000 ]---\\n\\n[mawupeng1@huawei.com: unmap_poisoned_folio(): remove shadowed local `mapping\u0027, per Miaohe]\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm: fallo de memoria: actualizaci\u00f3n del indicador ttu dentro de unmap_poisoned_folio. Serie de parches \\\"mm: fallo de memoria: desasignar correctamente un folio envenenado durante la migraci\u00f3n\\\", v3. Se corrigen dos errores durante la migraci\u00f3n de folios si este est\u00e1 envenenado. Este parche (de 3): El commit 6da6b1d4a7df (\\\"mm/hwpoison: convertir TTU_IGNORE_HWPOISON en TTU_HWPOISON\\\") introduce TTU_HWPOISON en lugar de TTU_IGNORE_HWPOISON para detener el env\u00edo de la se\u00f1al SIGBUS al acceder a una p\u00e1gina con error tras un error de memoria en un folio limpio. Sin embargo, durante la migraci\u00f3n de p\u00e1ginas, anon folio debe configurarse con TTU_HWPOISON durante unmap_*(). Para la cach\u00e9 de p\u00e1ginas, necesitamos una pol\u00edtica similar a la de hwpoison_user_mappings para configurar este indicador. Por lo tanto, mueva esta pol\u00edtica de hwpoison_user_mappings a unmap_poisoned_folio para gestionar esta advertencia correctamente. Se producir\u00e1 una advertencia durante el envenenamiento de folio de unamp con el siguiente registro: ------------[ cortar aqu\u00ed ]------------ ADVERTENCIA: CPU: 1 PID: 365 en mm/rmap.c:1847 try_to_unmap_one+0x8fc/0xd3c M\u00f3dulos vinculados: CPU: 1 UID: 0 PID: 365 Comm: bash Contaminado: GW 6.13.0-rc1-00018-gacdb4bbda7ab #42 Contaminado: [W]=WARN Nombre del hardware: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015 pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : try_to_unmap_one+0x8fc/0xd3c lr : try_to_unmap_one+0x3dc/0xd3c Rastreo de llamadas:  try_to_unmap_one+0x8fc/0xd3c (P) try_to_unmap_one+0x3dc/0xd3c (L) rmap_walk_anon+0xdc/0x1f8 rmap_walk+0x3c/0x58 try_to_unmap+0x88/0x90 unmap_poisoned_folio+0x30/0xa8 do_migrate_range+0x4a0/0x568 offline_pages+0x5a4/0x670 memory_block_action+0x17c/0x374 memory_subsys_offline+0x3c/0x78 device_offline+0xa4/0xd0 state_store+0x8c/0xf0 dev_attr_store+0x18/0x2c sysfs_kf_write+0x44/0x54 kernfs_fop_write_iter+0x118/0x1a8 vfs_write+0x3a8/0x4bc ksys_write+0x6c/0xf8 __arm64_sys_write+0x1c/0x28 invoke_syscall+0x44/0x100 el0_svc_common.constprop.0+0x40/0xe0 do_el0_svc+0x1c/0x28 el0_svc+0x30/0xd0 el0t_64_sync_handler+0xc8/0xcc el0t_64_sync+0x198/0x19c ---[fin de seguimiento 0000000000000000 ]--- [mawupeng1@huawei.com: unmap_poisoned_folio(): eliminar el \u0027mapeo\u0027 local sombreado, seg\u00fan Miaohe] Enlace: https://lkml.kernel.org/r/20250219060653.3849083-1-mawupeng1@huawei.com\"}],\"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\":\"6.1.16\",\"versionEndExcluding\":\"6.2\",\"matchCriteriaId\":\"E0F792B8-000E-4D97-B7F7-B3660397A964\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2.3\",\"versionEndExcluding\":\"6.12.19\",\"matchCriteriaId\":\"EB5FAD40-FE0F-4A65-BFB5-0690AD42A7DD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.13.7\",\"matchCriteriaId\":\"842F5A44-3E71-4546-B4FD-43B0ACE3F32B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"186716B6-2B66-4BD0-852E-D48E71C0C85F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"0D3E781C-403A-498F-9DA9-ECEE50F41E75\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"66619FB8-0AAF-4166-B2CF-67B24143261D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"D3D6550E-6679-4560-902D-AF52DCFE905B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"45B90F6B-BEC7-4D4E-883A-9DBADE021750\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/425c12c076e6fc6b2cb04b9f960319d31dcabc76\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/608cc7deb428f1122ed426060233622ebf667b6e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b81679b1633aa43c0d973adfa816d78c1ed0d032\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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