cve-2024-44972
Vulnerability from cvelistv5
Published
2024-09-04 18:56
Modified
2024-12-19 09:19
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: do not clear page dirty inside extent_write_locked_range() [BUG] For subpage + zoned case, the following workload can lead to rsv data leak at unmount time: # mkfs.btrfs -f -s 4k $dev # mount $dev $mnt # fsstress -w -n 8 -d $mnt -s 1709539240 0/0: fiemap - no filename 0/1: copyrange read - no filename 0/2: write - no filename 0/3: rename - no source filename 0/4: creat f0 x:0 0 0 0/4: creat add id=0,parent=-1 0/5: writev f0[259 1 0 0 0 0] [778052,113,965] 0 0/6: ioctl(FIEMAP) f0[259 1 0 0 224 887097] [1294220,2291618343991484791,0x10000] -1 0/7: dwrite - xfsctl(XFS_IOC_DIOINFO) f0[259 1 0 0 224 887097] return 25, fallback to stat() 0/7: dwrite f0[259 1 0 0 224 887097] [696320,102400] 0 # umount $mnt The dmesg includes the following rsv leak detection warning (all call trace skipped): ------------[ cut here ]------------ WARNING: CPU: 2 PID: 4528 at fs/btrfs/inode.c:8653 btrfs_destroy_inode+0x1e0/0x200 [btrfs] ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 2 PID: 4528 at fs/btrfs/inode.c:8654 btrfs_destroy_inode+0x1a8/0x200 [btrfs] ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 2 PID: 4528 at fs/btrfs/inode.c:8660 btrfs_destroy_inode+0x1a0/0x200 [btrfs] ---[ end trace 0000000000000000 ]--- BTRFS info (device sda): last unmount of filesystem 1b4abba9-de34-4f07-9e7f-157cf12a18d6 ------------[ cut here ]------------ WARNING: CPU: 3 PID: 4528 at fs/btrfs/block-group.c:4434 btrfs_free_block_groups+0x338/0x500 [btrfs] ---[ end trace 0000000000000000 ]--- BTRFS info (device sda): space_info DATA has 268218368 free, is not full BTRFS info (device sda): space_info total=268435456, used=204800, pinned=0, reserved=0, may_use=12288, readonly=0 zone_unusable=0 BTRFS info (device sda): global_block_rsv: size 0 reserved 0 BTRFS info (device sda): trans_block_rsv: size 0 reserved 0 BTRFS info (device sda): chunk_block_rsv: size 0 reserved 0 BTRFS info (device sda): delayed_block_rsv: size 0 reserved 0 BTRFS info (device sda): delayed_refs_rsv: size 0 reserved 0 ------------[ cut here ]------------ WARNING: CPU: 3 PID: 4528 at fs/btrfs/block-group.c:4434 btrfs_free_block_groups+0x338/0x500 [btrfs] ---[ end trace 0000000000000000 ]--- BTRFS info (device sda): space_info METADATA has 267796480 free, is not full BTRFS info (device sda): space_info total=268435456, used=131072, pinned=0, reserved=0, may_use=262144, readonly=0 zone_unusable=245760 BTRFS info (device sda): global_block_rsv: size 0 reserved 0 BTRFS info (device sda): trans_block_rsv: size 0 reserved 0 BTRFS info (device sda): chunk_block_rsv: size 0 reserved 0 BTRFS info (device sda): delayed_block_rsv: size 0 reserved 0 BTRFS info (device sda): delayed_refs_rsv: size 0 reserved 0 Above $dev is a tcmu-runner emulated zoned HDD, which has a max zone append size of 64K, and the system has 64K page size. [CAUSE] I have added several trace_printk() to show the events (header skipped): > btrfs_dirty_pages: r/i=5/259 dirty start=774144 len=114688 > btrfs_dirty_pages: r/i=5/259 dirty part of page=720896 off_in_page=53248 len_in_page=12288 > btrfs_dirty_pages: r/i=5/259 dirty part of page=786432 off_in_page=0 len_in_page=65536 > btrfs_dirty_pages: r/i=5/259 dirty part of page=851968 off_in_page=0 len_in_page=36864 The above lines show our buffered write has dirtied 3 pages of inode 259 of root 5: 704K 768K 832K 896K I |////I/////////////////I///////////| I 756K 868K |///| is the dirtied range using subpage bitmaps. and 'I' is the page boundary. Meanwhile all three pages (704K, 768K, 832K) have their PageDirty flag set. > btrfs_direct_write: r/i=5/259 start dio filepos=696320 len=102400 Then direct IO writ ---truncated---
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/97713b1a2ced1e4a2a6c40045903797ebd44d7e0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ba4dedb71356638d8284e34724daca944be70368Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d3b403209f767e5857c1b9fda66726e6e6ffc99fPatch
Impacted products
Vendor Product Version
Linux Linux
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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-44972",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T17:39:07.741693Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-12T17:33:34.428Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/extent_io.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ba4dedb71356638d8284e34724daca944be70368",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "d3b403209f767e5857c1b9fda66726e6e6ffc99f",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
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            {
              "lessThan": "97713b1a2ced1e4a2a6c40045903797ebd44d7e0",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/extent_io.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.10.*",
              "status": "unaffected",
              "version": "6.10.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.11",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: do not clear page dirty inside extent_write_locked_range()\n\n[BUG]\nFor subpage + zoned case, the following workload can lead to rsv data\nleak at unmount time:\n\n  # mkfs.btrfs -f -s 4k $dev\n  # mount $dev $mnt\n  # fsstress -w -n 8 -d $mnt -s 1709539240\n  0/0: fiemap - no filename\n  0/1: copyrange read - no filename\n  0/2: write - no filename\n  0/3: rename - no source filename\n  0/4: creat f0 x:0 0 0\n  0/4: creat add id=0,parent=-1\n  0/5: writev f0[259 1 0 0 0 0] [778052,113,965] 0\n  0/6: ioctl(FIEMAP) f0[259 1 0 0 224 887097] [1294220,2291618343991484791,0x10000] -1\n  0/7: dwrite - xfsctl(XFS_IOC_DIOINFO) f0[259 1 0 0 224 887097] return 25, fallback to stat()\n  0/7: dwrite f0[259 1 0 0 224 887097] [696320,102400] 0\n  # umount $mnt\n\nThe dmesg includes the following rsv leak detection warning (all call\ntrace skipped):\n\n  ------------[ cut here ]------------\n  WARNING: CPU: 2 PID: 4528 at fs/btrfs/inode.c:8653 btrfs_destroy_inode+0x1e0/0x200 [btrfs]\n  ---[ end trace 0000000000000000 ]---\n  ------------[ cut here ]------------\n  WARNING: CPU: 2 PID: 4528 at fs/btrfs/inode.c:8654 btrfs_destroy_inode+0x1a8/0x200 [btrfs]\n  ---[ end trace 0000000000000000 ]---\n  ------------[ cut here ]------------\n  WARNING: CPU: 2 PID: 4528 at fs/btrfs/inode.c:8660 btrfs_destroy_inode+0x1a0/0x200 [btrfs]\n  ---[ end trace 0000000000000000 ]---\n  BTRFS info (device sda): last unmount of filesystem 1b4abba9-de34-4f07-9e7f-157cf12a18d6\n  ------------[ cut here ]------------\n  WARNING: CPU: 3 PID: 4528 at fs/btrfs/block-group.c:4434 btrfs_free_block_groups+0x338/0x500 [btrfs]\n  ---[ end trace 0000000000000000 ]---\n  BTRFS info (device sda): space_info DATA has 268218368 free, is not full\n  BTRFS info (device sda): space_info total=268435456, used=204800, pinned=0, reserved=0, may_use=12288, readonly=0 zone_unusable=0\n  BTRFS info (device sda): global_block_rsv: size 0 reserved 0\n  BTRFS info (device sda): trans_block_rsv: size 0 reserved 0\n  BTRFS info (device sda): chunk_block_rsv: size 0 reserved 0\n  BTRFS info (device sda): delayed_block_rsv: size 0 reserved 0\n  BTRFS info (device sda): delayed_refs_rsv: size 0 reserved 0\n  ------------[ cut here ]------------\n  WARNING: CPU: 3 PID: 4528 at fs/btrfs/block-group.c:4434 btrfs_free_block_groups+0x338/0x500 [btrfs]\n  ---[ end trace 0000000000000000 ]---\n  BTRFS info (device sda): space_info METADATA has 267796480 free, is not full\n  BTRFS info (device sda): space_info total=268435456, used=131072, pinned=0, reserved=0, may_use=262144, readonly=0 zone_unusable=245760\n  BTRFS info (device sda): global_block_rsv: size 0 reserved 0\n  BTRFS info (device sda): trans_block_rsv: size 0 reserved 0\n  BTRFS info (device sda): chunk_block_rsv: size 0 reserved 0\n  BTRFS info (device sda): delayed_block_rsv: size 0 reserved 0\n  BTRFS info (device sda): delayed_refs_rsv: size 0 reserved 0\n\nAbove $dev is a tcmu-runner emulated zoned HDD, which has a max zone\nappend size of 64K, and the system has 64K page size.\n\n[CAUSE]\nI have added several trace_printk() to show the events (header skipped):\n\n  \u003e btrfs_dirty_pages: r/i=5/259 dirty start=774144 len=114688\n  \u003e btrfs_dirty_pages: r/i=5/259 dirty part of page=720896 off_in_page=53248 len_in_page=12288\n  \u003e btrfs_dirty_pages: r/i=5/259 dirty part of page=786432 off_in_page=0 len_in_page=65536\n  \u003e btrfs_dirty_pages: r/i=5/259 dirty part of page=851968 off_in_page=0 len_in_page=36864\n\nThe above lines show our buffered write has dirtied 3 pages of inode\n259 of root 5:\n\n  704K             768K              832K              896K\n  I           |////I/////////////////I///////////|     I\n              756K                               868K\n\n  |///| is the dirtied range using subpage bitmaps. and \u0027I\u0027 is the page\n  boundary.\n\n  Meanwhile all three pages (704K, 768K, 832K) have their PageDirty\n  flag set.\n\n  \u003e btrfs_direct_write: r/i=5/259 start dio filepos=696320 len=102400\n\nThen direct IO writ\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-12-19T09:19:23.752Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ba4dedb71356638d8284e34724daca944be70368"
        },
        {
          "url": "https://git.kernel.org/stable/c/d3b403209f767e5857c1b9fda66726e6e6ffc99f"
        },
        {
          "url": "https://git.kernel.org/stable/c/97713b1a2ced1e4a2a6c40045903797ebd44d7e0"
        }
      ],
      "title": "btrfs: do not clear page dirty inside extent_write_locked_range()",
      "x_generator": {
        "engine": "bippy-5f407fcff5a0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-44972",
    "datePublished": "2024-09-04T18:56:48.145Z",
    "dateReserved": "2024-08-21T05:34:56.669Z",
    "dateUpdated": "2024-12-19T09:19:23.752Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-44972\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-09-04T19:15:31.430\",\"lastModified\":\"2024-10-03T16:10:12.077\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbtrfs: do not clear page dirty inside extent_write_locked_range()\\n\\n[BUG]\\nFor subpage + zoned case, the following workload can lead to rsv data\\nleak at unmount time:\\n\\n  # mkfs.btrfs -f -s 4k $dev\\n  # mount $dev $mnt\\n  # fsstress -w -n 8 -d $mnt -s 1709539240\\n  0/0: fiemap - no filename\\n  0/1: copyrange read - no filename\\n  0/2: write - no filename\\n  0/3: rename - no source filename\\n  0/4: creat f0 x:0 0 0\\n  0/4: creat add id=0,parent=-1\\n  0/5: writev f0[259 1 0 0 0 0] [778052,113,965] 0\\n  0/6: ioctl(FIEMAP) f0[259 1 0 0 224 887097] [1294220,2291618343991484791,0x10000] -1\\n  0/7: dwrite - xfsctl(XFS_IOC_DIOINFO) f0[259 1 0 0 224 887097] return 25, fallback to stat()\\n  0/7: dwrite f0[259 1 0 0 224 887097] [696320,102400] 0\\n  # umount $mnt\\n\\nThe dmesg includes the following rsv leak detection warning (all call\\ntrace skipped):\\n\\n  ------------[ cut here ]------------\\n  WARNING: CPU: 2 PID: 4528 at fs/btrfs/inode.c:8653 btrfs_destroy_inode+0x1e0/0x200 [btrfs]\\n  ---[ end trace 0000000000000000 ]---\\n  ------------[ cut here ]------------\\n  WARNING: CPU: 2 PID: 4528 at fs/btrfs/inode.c:8654 btrfs_destroy_inode+0x1a8/0x200 [btrfs]\\n  ---[ end trace 0000000000000000 ]---\\n  ------------[ cut here ]------------\\n  WARNING: CPU: 2 PID: 4528 at fs/btrfs/inode.c:8660 btrfs_destroy_inode+0x1a0/0x200 [btrfs]\\n  ---[ end trace 0000000000000000 ]---\\n  BTRFS info (device sda): last unmount of filesystem 1b4abba9-de34-4f07-9e7f-157cf12a18d6\\n  ------------[ cut here ]------------\\n  WARNING: CPU: 3 PID: 4528 at fs/btrfs/block-group.c:4434 btrfs_free_block_groups+0x338/0x500 [btrfs]\\n  ---[ end trace 0000000000000000 ]---\\n  BTRFS info (device sda): space_info DATA has 268218368 free, is not full\\n  BTRFS info (device sda): space_info total=268435456, used=204800, pinned=0, reserved=0, may_use=12288, readonly=0 zone_unusable=0\\n  BTRFS info (device sda): global_block_rsv: size 0 reserved 0\\n  BTRFS info (device sda): trans_block_rsv: size 0 reserved 0\\n  BTRFS info (device sda): chunk_block_rsv: size 0 reserved 0\\n  BTRFS info (device sda): delayed_block_rsv: size 0 reserved 0\\n  BTRFS info (device sda): delayed_refs_rsv: size 0 reserved 0\\n  ------------[ cut here ]------------\\n  WARNING: CPU: 3 PID: 4528 at fs/btrfs/block-group.c:4434 btrfs_free_block_groups+0x338/0x500 [btrfs]\\n  ---[ end trace 0000000000000000 ]---\\n  BTRFS info (device sda): space_info METADATA has 267796480 free, is not full\\n  BTRFS info (device sda): space_info total=268435456, used=131072, pinned=0, reserved=0, may_use=262144, readonly=0 zone_unusable=245760\\n  BTRFS info (device sda): global_block_rsv: size 0 reserved 0\\n  BTRFS info (device sda): trans_block_rsv: size 0 reserved 0\\n  BTRFS info (device sda): chunk_block_rsv: size 0 reserved 0\\n  BTRFS info (device sda): delayed_block_rsv: size 0 reserved 0\\n  BTRFS info (device sda): delayed_refs_rsv: size 0 reserved 0\\n\\nAbove $dev is a tcmu-runner emulated zoned HDD, which has a max zone\\nappend size of 64K, and the system has 64K page size.\\n\\n[CAUSE]\\nI have added several trace_printk() to show the events (header skipped):\\n\\n  \u003e btrfs_dirty_pages: r/i=5/259 dirty start=774144 len=114688\\n  \u003e btrfs_dirty_pages: r/i=5/259 dirty part of page=720896 off_in_page=53248 len_in_page=12288\\n  \u003e btrfs_dirty_pages: r/i=5/259 dirty part of page=786432 off_in_page=0 len_in_page=65536\\n  \u003e btrfs_dirty_pages: r/i=5/259 dirty part of page=851968 off_in_page=0 len_in_page=36864\\n\\nThe above lines show our buffered write has dirtied 3 pages of inode\\n259 of root 5:\\n\\n  704K             768K              832K              896K\\n  I           |////I/////////////////I///////////|     I\\n              756K                               868K\\n\\n  |///| is the dirtied range using subpage bitmaps. and \u0027I\u0027 is the page\\n  boundary.\\n\\n  Meanwhile all three pages (704K, 768K, 832K) have their PageDirty\\n  flag set.\\n\\n  \u003e btrfs_direct_write: r/i=5/259 start dio filepos=696320 len=102400\\n\\nThen direct IO writ\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: no borrar la p\u00e1gina sucia dentro de extended_write_locked_range() [ERROR] Para el caso de subp\u00e1gina + zonificaci\u00f3n, la siguiente carga de trabajo puede provocar una fuga de datos de rsv en el momento del desmontaje: # mkfs.btrfs -f -s 4k $dev # mount $dev $mnt # fsstress -w -n 8 -d $mnt -s 1709539240 0/0: fiemap - sin nombre de archivo 0/1: copyrange read - sin nombre de archivo 0/2: write - sin nombre de archivo 0/3: rename - sin nombre de archivo de origen 0/4: creat f0 x:0 0 0 0/4: creat add id=0,parent=-1 0/5: writev f0[259 1 0 0 0 0] [778052,113,965] 0 0/6: ioctl(FIEMAP) f0[259 1 0 0 224 887097] [1294220,2291618343991484791,0x10000] -1 0/7: dwrite - xfsctl(XFS_IOC_DIOINFO) f0[259 1 0 0 224 887097] return 25, fallback to stat() 0/7: dwrite f0[259 1 0 0 224 887097] [696320,102400] 0 # umount $mnt El dmesg incluye la siguiente advertencia de detecci\u00f3n de fugas de rsv (se omite todo el seguimiento de llamadas): ------------[ cortar aqu\u00ed ]------------ ADVERTENCIA: CPU: 2 PID: 4528 en fs/btrfs/inode.c:8653 btrfs_destroy_inode+0x1e0/0x200 [btrfs] ---[ fin del seguimiento 000000000000000 ]--- ------------[ cortar aqu\u00ed ]------------ ADVERTENCIA: CPU: 2 PID: 4528 en fs/btrfs/inode.c:8654 btrfs_destroy_inode+0x1a8/0x200 [btrfs] ---[ fin del seguimiento 000000000000000 ]--- ------------[ cortar aqu\u00ed ]------------ ADVERTENCIA: CPU: 2 PID: 4528 en fs/btrfs/inode.c:8660 btrfs_destroy_inode+0x1a0/0x200 [btrfs] ---[ fin del seguimiento 000000000000000 ]--- Informaci\u00f3n de BTRFS (dispositivo sda): \u00faltimo desmontaje del sistema de archivos 1b4abba9-de34-4f07-9e7f-157cf12a18d6 ------------[ cortar aqu\u00ed ]------------ ADVERTENCIA: CPU: 3 PID: 4528 en fs/btrfs/block-group.c:4434 btrfs_free_block_groups+0x338/0x500 [btrfs] ---[ fin del seguimiento 000000000000000 ]--- Informaci\u00f3n de BTRFS (dispositivo sda): space_info DATA tiene 268218368 libres, no est\u00e1 lleno Informaci\u00f3n de BTRFS (dispositivo sda): space_info total=268435456, used=204800, pinned=0, reserved=0, may_use=12288, readonly=0 zone_unusable=0 BTRFS informaci\u00f3n (dispositivo sda): global_block_rsv: tama\u00f1o 0 reservado 0 informaci\u00f3n BTRFS (dispositivo sda): trans_block_rsv: tama\u00f1o 0 reservado 0 informaci\u00f3n BTRFS (dispositivo sda): chunk_block_rsv: tama\u00f1o 0 reservado 0 informaci\u00f3n BTRFS (dispositivo sda): delayed_block_rsv: tama\u00f1o 0 reservado 0 informaci\u00f3n BTRFS (dispositivo sda): delayed_refs_rsv: tama\u00f1o 0 reservado 0 ------------[ cortar aqu\u00ed ]------------ ADVERTENCIA: CPU: 3 PID: 4528 en fs/btrfs/block-group.c:4434 btrfs_free_block_groups+0x338/0x500 [btrfs] ---[ fin de seguimiento 000000000000000 ]--- informaci\u00f3n BTRFS (dispositivo sda): space_info METADATA tiene 267796480 libres, es Informaci\u00f3n BTRFS no completa (dispositivo sda): space_info total=268435456, used=131072, pinned=0, reserved=0, may_use=262144, readonly=0 zone_unusable=245760 Informaci\u00f3n BTRFS (dispositivo sda): global_block_rsv: tama\u00f1o 0 reservado 0 Informaci\u00f3n BTRFS (dispositivo sda): trans_block_rsv: tama\u00f1o 0 reservado 0 Informaci\u00f3n BTRFS (dispositivo sda): chunk_block_rsv: tama\u00f1o 0 reservado 0 Informaci\u00f3n BTRFS (dispositivo sda): delayed_block_rsv: tama\u00f1o 0 reservado 0 Informaci\u00f3n BTRFS (dispositivo sda): delayed_refs_rsv: tama\u00f1o 0 reservado 0 Arriba $dev es un HDD zonificado emulado tcmu-runner, que tiene un tama\u00f1o m\u00e1ximo de anexi\u00f3n de zona de 64K, y el sistema tiene un tama\u00f1o de p\u00e1gina de 64K. [CAUSA] He a\u00f1adido varios trace_printk() para mostrar los eventos (encabezado omitido): \u0026gt; btrfs_dirty_pages: r/i=5/259 dirty start=774144 len=114688 \u0026gt; btrfs_dirty_pages: r/i=5/259 dirty part of page=720896 off_in_page=53248 len_in_page=12288 \u0026gt; btrfs_dirty_pages: r/i=5/259 dirty part of page=786432 off_in_page=0 len_in_page=65536 \u0026gt; btrfs_dirty_pages: r/i=5/259 dirty part of page=851968 off_in_page=0 len_in_page=36864 Las l\u00edneas anteriores muestran que nuestra escritura en b\u00fafer ha ensuciado 3 p\u00e1ginas de inodo 259 de la ra\u00edz 5: 704K 768K 832K 896K --- truncado ----\"}],\"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:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"6.6.46\",\"matchCriteriaId\":\"84C35A98-08C9-4674-8AC8-9CC0757B7699\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.10.5\",\"matchCriteriaId\":\"D074AE50-4A5E-499C-A2FD-75FD60DEA560\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/97713b1a2ced1e4a2a6c40045903797ebd44d7e0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ba4dedb71356638d8284e34724daca944be70368\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d3b403209f767e5857c1b9fda66726e6e6ffc99f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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