cve-2024-26944
Vulnerability from cvelistv5
Published
2024-05-01 05:18
Modified
2024-08-02 00:21
Severity
Summary
btrfs: zoned: fix use-after-free in do_zone_finish()
References
SourceURLTags
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1ec17ef59168a1a6f1105f5dc517f783839a5302
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/34ca809e055eca5cfe63d9c7efbf80b7c21b4e57
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
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{
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                "id": "CVE-2024-26944",
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                "role": "CISA Coordinator",
                "timestamp": "2024-05-28T17:52:17.817601Z",
                "version": "2.0.3"
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        "title": "CVE Program Container"
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    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/zoned.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "34ca809e055e",
              "status": "affected",
              "version": "1da177e4c3f4",
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              "status": "affected",
              "version": "1da177e4c3f4",
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        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/zoned.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.3",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix"
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        }
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: zoned: fix use-after-free in do_zone_finish()\n\nShinichiro reported the following use-after-free triggered by the device\nreplace operation in fstests btrfs/070.\n\n BTRFS info (device nullb1): scrub: finished on devid 1 with status: 0\n ==================================================================\n BUG: KASAN: slab-use-after-free in do_zone_finish+0x91a/0xb90 [btrfs]\n Read of size 8 at addr ffff8881543c8060 by task btrfs-cleaner/3494007\n\n CPU: 0 PID: 3494007 Comm: btrfs-cleaner Tainted: G        W          6.8.0-rc5-kts #1\n Hardware name: Supermicro Super Server/X11SPi-TF, BIOS 3.3 02/21/2020\n Call Trace:\n  \u003cTASK\u003e\n  dump_stack_lvl+0x5b/0x90\n  print_report+0xcf/0x670\n  ? __virt_addr_valid+0x200/0x3e0\n  kasan_report+0xd8/0x110\n  ? do_zone_finish+0x91a/0xb90 [btrfs]\n  ? do_zone_finish+0x91a/0xb90 [btrfs]\n  do_zone_finish+0x91a/0xb90 [btrfs]\n  btrfs_delete_unused_bgs+0x5e1/0x1750 [btrfs]\n  ? __pfx_btrfs_delete_unused_bgs+0x10/0x10 [btrfs]\n  ? btrfs_put_root+0x2d/0x220 [btrfs]\n  ? btrfs_clean_one_deleted_snapshot+0x299/0x430 [btrfs]\n  cleaner_kthread+0x21e/0x380 [btrfs]\n  ? __pfx_cleaner_kthread+0x10/0x10 [btrfs]\n  kthread+0x2e3/0x3c0\n  ? __pfx_kthread+0x10/0x10\n  ret_from_fork+0x31/0x70\n  ? __pfx_kthread+0x10/0x10\n  ret_from_fork_asm+0x1b/0x30\n  \u003c/TASK\u003e\n\n Allocated by task 3493983:\n  kasan_save_stack+0x33/0x60\n  kasan_save_track+0x14/0x30\n  __kasan_kmalloc+0xaa/0xb0\n  btrfs_alloc_device+0xb3/0x4e0 [btrfs]\n  device_list_add.constprop.0+0x993/0x1630 [btrfs]\n  btrfs_scan_one_device+0x219/0x3d0 [btrfs]\n  btrfs_control_ioctl+0x26e/0x310 [btrfs]\n  __x64_sys_ioctl+0x134/0x1b0\n  do_syscall_64+0x99/0x190\n  entry_SYSCALL_64_after_hwframe+0x6e/0x76\n\n Freed by task 3494056:\n  kasan_save_stack+0x33/0x60\n  kasan_save_track+0x14/0x30\n  kasan_save_free_info+0x3f/0x60\n  poison_slab_object+0x102/0x170\n  __kasan_slab_free+0x32/0x70\n  kfree+0x11b/0x320\n  btrfs_rm_dev_replace_free_srcdev+0xca/0x280 [btrfs]\n  btrfs_dev_replace_finishing+0xd7e/0x14f0 [btrfs]\n  btrfs_dev_replace_by_ioctl+0x1286/0x25a0 [btrfs]\n  btrfs_ioctl+0xb27/0x57d0 [btrfs]\n  __x64_sys_ioctl+0x134/0x1b0\n  do_syscall_64+0x99/0x190\n  entry_SYSCALL_64_after_hwframe+0x6e/0x76\n\n The buggy address belongs to the object at ffff8881543c8000\n  which belongs to the cache kmalloc-1k of size 1024\n The buggy address is located 96 bytes inside of\n  freed 1024-byte region [ffff8881543c8000, ffff8881543c8400)\n\n The buggy address belongs to the physical page:\n page:00000000fe2c1285 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1543c8\n head:00000000fe2c1285 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0\n flags: 0x17ffffc0000840(slab|head|node=0|zone=2|lastcpupid=0x1fffff)\n page_type: 0xffffffff()\n raw: 0017ffffc0000840 ffff888100042dc0 ffffea0019e8f200 dead000000000002\n raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000\n page dumped because: kasan: bad access detected\n\n Memory state around the buggy address:\n  ffff8881543c7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n  ffff8881543c7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n \u003effff8881543c8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n                                                        ^\n  ffff8881543c8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n  ffff8881543c8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n\nThis UAF happens because we\u0027re accessing stale zone information of a\nalready removed btrfs_device in do_zone_finish().\n\nThe sequence of events is as follows:\n\nbtrfs_dev_replace_start\n  btrfs_scrub_dev\n   btrfs_dev_replace_finishing\n    btrfs_dev_replace_update_device_in_mapping_tree \u003c-- devices replaced\n    btrfs_rm_dev_replace_free_srcdev\n     btrfs_free_device                              \u003c-- device freed\n\ncleaner_kthread\n btrfs_delete_unused_bgs\n  btrfs_zone_finish\n   do_zone_finish              \u003c-- refers the freed device\n\nThe reason for this is that we\u0027re using a\n---truncated---"
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      "providerMetadata": {
        "dateUpdated": "2024-05-29T05:25:37.349Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/1ec17ef59168a1a6f1105f5dc517f783839a5302"
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      "title": "btrfs: zoned: fix use-after-free in do_zone_finish()",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26944",
    "datePublished": "2024-05-01T05:18:04.909Z",
    "dateReserved": "2024-02-19T14:20:24.197Z",
    "dateUpdated": "2024-08-02T00:21:05.525Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26944\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-01T06:15:10.010\",\"lastModified\":\"2024-05-01T13:02:20.750\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbtrfs: zoned: fix use-after-free in do_zone_finish()\\n\\nShinichiro reported the following use-after-free triggered by the device\\nreplace operation in fstests btrfs/070.\\n\\n BTRFS info (device nullb1): scrub: finished on devid 1 with status: 0\\n ==================================================================\\n BUG: KASAN: slab-use-after-free in do_zone_finish+0x91a/0xb90 [btrfs]\\n Read of size 8 at addr ffff8881543c8060 by task btrfs-cleaner/3494007\\n\\n CPU: 0 PID: 3494007 Comm: btrfs-cleaner Tainted: G        W          6.8.0-rc5-kts #1\\n Hardware name: Supermicro Super Server/X11SPi-TF, BIOS 3.3 02/21/2020\\n Call Trace:\\n  \u003cTASK\u003e\\n  dump_stack_lvl+0x5b/0x90\\n  print_report+0xcf/0x670\\n  ? __virt_addr_valid+0x200/0x3e0\\n  kasan_report+0xd8/0x110\\n  ? do_zone_finish+0x91a/0xb90 [btrfs]\\n  ? do_zone_finish+0x91a/0xb90 [btrfs]\\n  do_zone_finish+0x91a/0xb90 [btrfs]\\n  btrfs_delete_unused_bgs+0x5e1/0x1750 [btrfs]\\n  ? __pfx_btrfs_delete_unused_bgs+0x10/0x10 [btrfs]\\n  ? btrfs_put_root+0x2d/0x220 [btrfs]\\n  ? btrfs_clean_one_deleted_snapshot+0x299/0x430 [btrfs]\\n  cleaner_kthread+0x21e/0x380 [btrfs]\\n  ? __pfx_cleaner_kthread+0x10/0x10 [btrfs]\\n  kthread+0x2e3/0x3c0\\n  ? __pfx_kthread+0x10/0x10\\n  ret_from_fork+0x31/0x70\\n  ? __pfx_kthread+0x10/0x10\\n  ret_from_fork_asm+0x1b/0x30\\n  \u003c/TASK\u003e\\n\\n Allocated by task 3493983:\\n  kasan_save_stack+0x33/0x60\\n  kasan_save_track+0x14/0x30\\n  __kasan_kmalloc+0xaa/0xb0\\n  btrfs_alloc_device+0xb3/0x4e0 [btrfs]\\n  device_list_add.constprop.0+0x993/0x1630 [btrfs]\\n  btrfs_scan_one_device+0x219/0x3d0 [btrfs]\\n  btrfs_control_ioctl+0x26e/0x310 [btrfs]\\n  __x64_sys_ioctl+0x134/0x1b0\\n  do_syscall_64+0x99/0x190\\n  entry_SYSCALL_64_after_hwframe+0x6e/0x76\\n\\n Freed by task 3494056:\\n  kasan_save_stack+0x33/0x60\\n  kasan_save_track+0x14/0x30\\n  kasan_save_free_info+0x3f/0x60\\n  poison_slab_object+0x102/0x170\\n  __kasan_slab_free+0x32/0x70\\n  kfree+0x11b/0x320\\n  btrfs_rm_dev_replace_free_srcdev+0xca/0x280 [btrfs]\\n  btrfs_dev_replace_finishing+0xd7e/0x14f0 [btrfs]\\n  btrfs_dev_replace_by_ioctl+0x1286/0x25a0 [btrfs]\\n  btrfs_ioctl+0xb27/0x57d0 [btrfs]\\n  __x64_sys_ioctl+0x134/0x1b0\\n  do_syscall_64+0x99/0x190\\n  entry_SYSCALL_64_after_hwframe+0x6e/0x76\\n\\n The buggy address belongs to the object at ffff8881543c8000\\n  which belongs to the cache kmalloc-1k of size 1024\\n The buggy address is located 96 bytes inside of\\n  freed 1024-byte region [ffff8881543c8000, ffff8881543c8400)\\n\\n The buggy address belongs to the physical page:\\n page:00000000fe2c1285 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1543c8\\n head:00000000fe2c1285 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0\\n flags: 0x17ffffc0000840(slab|head|node=0|zone=2|lastcpupid=0x1fffff)\\n page_type: 0xffffffff()\\n raw: 0017ffffc0000840 ffff888100042dc0 ffffea0019e8f200 dead000000000002\\n raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000\\n page dumped because: kasan: bad access detected\\n\\n Memory state around the buggy address:\\n  ffff8881543c7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\\n  ffff8881543c7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\\n \u003effff8881543c8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\\n                                                        ^\\n  ffff8881543c8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\\n  ffff8881543c8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\\n\\nThis UAF happens because we\u0027re accessing stale zone information of a\\nalready removed btrfs_device in do_zone_finish().\\n\\nThe sequence of events is as follows:\\n\\nbtrfs_dev_replace_start\\n  btrfs_scrub_dev\\n   btrfs_dev_replace_finishing\\n    btrfs_dev_replace_update_device_in_mapping_tree \u003c-- devices replaced\\n    btrfs_rm_dev_replace_free_srcdev\\n     btrfs_free_device                              \u003c-- device freed\\n\\ncleaner_kthread\\n btrfs_delete_unused_bgs\\n  btrfs_zone_finish\\n   do_zone_finish              \u003c-- refers the freed device\\n\\nThe reason for this is that we\u0027re using a\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: btrfs:zoned: corrige use-after-free en do_zone_finish() Shinichiro inform\u00f3 el siguiente use-after-free desencadenado por la operaci\u00f3n de reemplazo de dispositivo en fstests btrfs/070. Informaci\u00f3n BTRFS (dispositivo nullb1): limpieza: finalizado en el dispositivo 1 con estado: 0 ================================== ================================= ERROR: KASAN: uso de losa despu\u00e9s de liberarlo en do_zone_finish+0x91a/0xb90 [btrfs] Lectura del tama\u00f1o 8 en la direcci\u00f3n ffff8881543c8060 mediante la tarea btrfs-cleaner/3494007 CPU: 0 PID: 3494007 Comm: btrfs-cleaner Contaminado: GW 6.8.0-rc5-kts #1 Nombre del hardware: Supermicro Super Server/X11SPi-TF , BIOS 3.3 21/02/2020 Seguimiento de llamadas:  dump_stack_lvl+0x5b/0x90 print_report+0xcf/0x670 ? __virt_addr_valid+0x200/0x3e0 kasan_report+0xd8/0x110 ? do_zone_finish+0x91a/0xb90 [btrfs]? do_zone_finish+0x91a/0xb90 [btrfs] do_zone_finish+0x91a/0xb90 [btrfs] btrfs_delete_unused_bgs+0x5e1/0x1750 [btrfs] ? __pfx_btrfs_delete_unused_bgs+0x10/0x10 [btrfs] ? btrfs_put_root+0x2d/0x220 [btrfs] ? btrfs_clean_one_deleted_snapshot+0x299/0x430 [btrfs] clean_kthread+0x21e/0x380 [btrfs] ? __pfx_cleaner_kthread+0x10/0x10 [btrfs] kthread+0x2e3/0x3c0 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x31/0x70 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1b/0x30  Asignado por tarea 3493983: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 __kasan_kmalloc+0xaa/0xb0 btrfs_alloc_device+0x b3/0x4e0 [btrfs] lista_dispositivo_add.constprop.0+0x993/ 0x1630 [btrfs] btrfs_scan_one_device+0x219/0x3d0 [btrfs] btrfs_control_ioctl+0x26e/0x310 [btrfs] __x64_sys_ioctl+0x134/0x1b0 do_syscall_64+0x99/0x190 entrada_SYSCALL_6 4_after_hwframe+0x6e/0x76 Liberado por la tarea 3494056: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3f/0x60 veneno_slab_object+0x102/0x170 __kasan_slab_free+0x32/0x70 kfree+0x11b/0x320 btrfs_rm_dev_replace_free_srcdev+0xca/0x280 [btrfs_dev_replace_finishing+0xd 7e/0x14f0 [btrfs] btrfs_dev_replace_by_ioctl+0x1286/0x25a0 [btrfs] btrfs_ioctl+0xb27/0x57d0 [ btrfs] __x64_sys_ioctl+0x134/0x1b0 do_syscall_64+0x99/0x190 Entry_SYSCALL_64_after_hwframe+0x6e/0x76 La direcci\u00f3n con errores pertenece al objeto en ffff8881543c8000 que pertenece al cach\u00e9 kmalloc-1k de tama\u00f1o 1024 Se encuentra la direcci\u00f3n con errores 96 bytes dentro de los 1024 bytes liberados regi\u00f3n [ffff8881543c8000, ffff8881543c8400) La direcci\u00f3n del error pertenece a la p\u00e1gina f\u00edsica: p\u00e1gina:00000000fe2c1285 refcount:1 mapcount:0 mapeo:00000000000000000 index:0x0 pfn:0x1543c8 head:00000000fe2c1285 entero_mapcount:0 nr_pages_mapped:0 pincount:0 banderas: 0x17ffffc0000840(slab|head|node=0|zone=2|lastcpupid=0x1fffff) tipo de p\u00e1gina: 0xffffffff() raw: 0017ffffc0000840 ffff888100042dc0 ffffea0019e8f200 dead000000000002 raw: 0000000000 0000000000100010 00000001ffffffff 0000000000000000 p\u00e1gina volcada porque: kasan: mal acceso detectado Estado de la memoria alrededor de la direcci\u00f3n con errores : ffff8881543c7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881543c7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \u0026gt;ffff8881543c8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881543c8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881543c8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb Esta UAF sucede porque estamos acceder a informaci\u00f3n de zona obsoleta de un btrfs_device ya eliminado en do_zone_finish(). La secuencia de eventos es la siguiente: btrfs_dev_replace_start btrfs_scrub_dev btrfs_dev_replace_finishing btrfs_dev_replace_update_device_in_mapping_tree \u0026lt;-- dispositivos reemplazados btrfs_rm_dev_replace_free_srcdev btrfs_free_device \u0026lt;-- dispositivo liberado clean_kthread btrfs_delete_unused_ bgs btrfs_zone_finish do_zone_finish \u0026lt;-- hace referencia al dispositivo liberado. La raz\u00f3n de esto es que estamos usando un ---truncado ---\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1ec17ef59168a1a6f1105f5dc517f783839a5302\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/34ca809e055eca5cfe63d9c7efbf80b7c21b4e57\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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