cve-2024-56677
Vulnerability from cvelistv5
Published
2024-12-28 09:46
Modified
2025-01-20 06:25
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: powerpc/fadump: Move fadump_cma_init to setup_arch() after initmem_init() During early init CMA_MIN_ALIGNMENT_BYTES can be PAGE_SIZE, since pageblock_order is still zero and it gets initialized later during initmem_init() e.g. setup_arch() -> initmem_init() -> sparse_init() -> set_pageblock_order() One such use case where this causes issue is - early_setup() -> early_init_devtree() -> fadump_reserve_mem() -> fadump_cma_init() This causes CMA memory alignment check to be bypassed in cma_init_reserved_mem(). Then later cma_activate_area() can hit a VM_BUG_ON_PAGE(pfn & ((1 << order) - 1)) if the reserved memory area was not pageblock_order aligned. Fix it by moving the fadump_cma_init() after initmem_init(), where other such cma reservations also gets called. <stack trace> ============== page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10010 flags: 0x13ffff800000000(node=1|zone=0|lastcpupid=0x7ffff) CMA raw: 013ffff800000000 5deadbeef0000100 5deadbeef0000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: VM_BUG_ON_PAGE(pfn & ((1 << order) - 1)) ------------[ cut here ]------------ kernel BUG at mm/page_alloc.c:778! Call Trace: __free_one_page+0x57c/0x7b0 (unreliable) free_pcppages_bulk+0x1a8/0x2c8 free_unref_page_commit+0x3d4/0x4e4 free_unref_page+0x458/0x6d0 init_cma_reserved_pageblock+0x114/0x198 cma_init_reserved_areas+0x270/0x3e0 do_one_initcall+0x80/0x2f8 kernel_init_freeable+0x33c/0x530 kernel_init+0x34/0x26c ret_from_kernel_user_thread+0x14/0x1c
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/05b94cae1c47f94588c3e7096963c1007c4d9c1d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7351c5a6507b4401aeecadb5959131410a339520
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/aabef6301dcf410dfd2b8759cd413b2a003c7e3f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c5c1d1ef70834013fc3bd12b6a0f4664c6d75a74
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f551637fe9bf863386309e03f9d148d97f535ad1
Impacted products
Vendor Product Version
Linux Linux Version: 11ac3e87ce09c27f4587a8c4fe0829d814021a82
Version: 11ac3e87ce09c27f4587a8c4fe0829d814021a82
Version: 11ac3e87ce09c27f4587a8c4fe0829d814021a82
Version: 11ac3e87ce09c27f4587a8c4fe0829d814021a82
Version: 11ac3e87ce09c27f4587a8c4fe0829d814021a82
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/include/asm/fadump.h",
            "arch/powerpc/kernel/fadump.c",
            "arch/powerpc/kernel/setup-common.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "aabef6301dcf410dfd2b8759cd413b2a003c7e3f",
              "status": "affected",
              "version": "11ac3e87ce09c27f4587a8c4fe0829d814021a82",
              "versionType": "git"
            },
            {
              "lessThan": "c5c1d1ef70834013fc3bd12b6a0f4664c6d75a74",
              "status": "affected",
              "version": "11ac3e87ce09c27f4587a8c4fe0829d814021a82",
              "versionType": "git"
            },
            {
              "lessThan": "f551637fe9bf863386309e03f9d148d97f535ad1",
              "status": "affected",
              "version": "11ac3e87ce09c27f4587a8c4fe0829d814021a82",
              "versionType": "git"
            },
            {
              "lessThan": "7351c5a6507b4401aeecadb5959131410a339520",
              "status": "affected",
              "version": "11ac3e87ce09c27f4587a8c4fe0829d814021a82",
              "versionType": "git"
            },
            {
              "lessThan": "05b94cae1c47f94588c3e7096963c1007c4d9c1d",
              "status": "affected",
              "version": "11ac3e87ce09c27f4587a8c4fe0829d814021a82",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/include/asm/fadump.h",
            "arch/powerpc/kernel/fadump.c",
            "arch/powerpc/kernel/setup-common.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.19"
            },
            {
              "lessThan": "5.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.120",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.64",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.11.*",
              "status": "unaffected",
              "version": "6.11.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/fadump: Move fadump_cma_init to setup_arch() after initmem_init()\n\nDuring early init CMA_MIN_ALIGNMENT_BYTES can be PAGE_SIZE,\nsince pageblock_order is still zero and it gets initialized\nlater during initmem_init() e.g.\nsetup_arch() -\u003e initmem_init() -\u003e sparse_init() -\u003e set_pageblock_order()\n\nOne such use case where this causes issue is -\nearly_setup() -\u003e early_init_devtree() -\u003e fadump_reserve_mem() -\u003e fadump_cma_init()\n\nThis causes CMA memory alignment check to be bypassed in\ncma_init_reserved_mem(). Then later cma_activate_area() can hit\na VM_BUG_ON_PAGE(pfn \u0026 ((1 \u003c\u003c order) - 1)) if the reserved memory\narea was not pageblock_order aligned.\n\nFix it by moving the fadump_cma_init() after initmem_init(),\nwhere other such cma reservations also gets called.\n\n\u003cstack trace\u003e\n==============\npage: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10010\nflags: 0x13ffff800000000(node=1|zone=0|lastcpupid=0x7ffff) CMA\nraw: 013ffff800000000 5deadbeef0000100 5deadbeef0000122 0000000000000000\nraw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000\npage dumped because: VM_BUG_ON_PAGE(pfn \u0026 ((1 \u003c\u003c order) - 1))\n------------[ cut here ]------------\nkernel BUG at mm/page_alloc.c:778!\n\nCall Trace:\n__free_one_page+0x57c/0x7b0 (unreliable)\nfree_pcppages_bulk+0x1a8/0x2c8\nfree_unref_page_commit+0x3d4/0x4e4\nfree_unref_page+0x458/0x6d0\ninit_cma_reserved_pageblock+0x114/0x198\ncma_init_reserved_areas+0x270/0x3e0\ndo_one_initcall+0x80/0x2f8\nkernel_init_freeable+0x33c/0x530\nkernel_init+0x34/0x26c\nret_from_kernel_user_thread+0x14/0x1c"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-01-20T06:25:45.188Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/aabef6301dcf410dfd2b8759cd413b2a003c7e3f"
        },
        {
          "url": "https://git.kernel.org/stable/c/c5c1d1ef70834013fc3bd12b6a0f4664c6d75a74"
        },
        {
          "url": "https://git.kernel.org/stable/c/f551637fe9bf863386309e03f9d148d97f535ad1"
        },
        {
          "url": "https://git.kernel.org/stable/c/7351c5a6507b4401aeecadb5959131410a339520"
        },
        {
          "url": "https://git.kernel.org/stable/c/05b94cae1c47f94588c3e7096963c1007c4d9c1d"
        }
      ],
      "title": "powerpc/fadump: Move fadump_cma_init to setup_arch() after initmem_init()",
      "x_generator": {
        "engine": "bippy-5f407fcff5a0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-56677",
    "datePublished": "2024-12-28T09:46:06.497Z",
    "dateReserved": "2024-12-27T15:00:39.845Z",
    "dateUpdated": "2025-01-20T06:25:45.188Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-56677\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-12-28T10:15:08.277\",\"lastModified\":\"2024-12-28T10:15:08.277\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\npowerpc/fadump: Move fadump_cma_init to setup_arch() after initmem_init()\\n\\nDuring early init CMA_MIN_ALIGNMENT_BYTES can be PAGE_SIZE,\\nsince pageblock_order is still zero and it gets initialized\\nlater during initmem_init() e.g.\\nsetup_arch() -\u003e initmem_init() -\u003e sparse_init() -\u003e set_pageblock_order()\\n\\nOne such use case where this causes issue is -\\nearly_setup() -\u003e early_init_devtree() -\u003e fadump_reserve_mem() -\u003e fadump_cma_init()\\n\\nThis causes CMA memory alignment check to be bypassed in\\ncma_init_reserved_mem(). Then later cma_activate_area() can hit\\na VM_BUG_ON_PAGE(pfn \u0026 ((1 \u003c\u003c order) - 1)) if the reserved memory\\narea was not pageblock_order aligned.\\n\\nFix it by moving the fadump_cma_init() after initmem_init(),\\nwhere other such cma reservations also gets called.\\n\\n\u003cstack trace\u003e\\n==============\\npage: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10010\\nflags: 0x13ffff800000000(node=1|zone=0|lastcpupid=0x7ffff) CMA\\nraw: 013ffff800000000 5deadbeef0000100 5deadbeef0000122 0000000000000000\\nraw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000\\npage dumped because: VM_BUG_ON_PAGE(pfn \u0026 ((1 \u003c\u003c order) - 1))\\n------------[ cut here ]------------\\nkernel BUG at mm/page_alloc.c:778!\\n\\nCall Trace:\\n__free_one_page+0x57c/0x7b0 (unreliable)\\nfree_pcppages_bulk+0x1a8/0x2c8\\nfree_unref_page_commit+0x3d4/0x4e4\\nfree_unref_page+0x458/0x6d0\\ninit_cma_reserved_pageblock+0x114/0x198\\ncma_init_reserved_areas+0x270/0x3e0\\ndo_one_initcall+0x80/0x2f8\\nkernel_init_freeable+0x33c/0x530\\nkernel_init+0x34/0x26c\\nret_from_kernel_user_thread+0x14/0x1c\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/05b94cae1c47f94588c3e7096963c1007c4d9c1d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7351c5a6507b4401aeecadb5959131410a339520\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/aabef6301dcf410dfd2b8759cd413b2a003c7e3f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c5c1d1ef70834013fc3bd12b6a0f4664c6d75a74\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f551637fe9bf863386309e03f9d148d97f535ad1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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