CVE-2024-26644
Vulnerability from cvelistv5
Published
2024-03-26 15:17
Modified
2024-11-05 09:13
Severity ?
Summary
btrfs: don't abort filesystem when attempting to snapshot deleted subvolume
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0877497dc97834728e1b528ddf1e1c484292c29c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2bdf872bcfe629a6202ffd6641615a8ed00e8464
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6e6bca99e8d88d989a7cde4c064abea552d5219b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7081929ab2572920e94d70be3d332e5c9f97095a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d8680b722f0ff6d7a01ddacc1844e0d52354d6ff
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ec794a7528199e1be6d47bec03f4755aa75df256
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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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\nbtrfs: don\u0027t abort filesystem when attempting to snapshot deleted subvolume\n\nIf the source file descriptor to the snapshot ioctl refers to a deleted\nsubvolume, we get the following abort:\n\n  BTRFS: Transaction aborted (error -2)\n  WARNING: CPU: 0 PID: 833 at fs/btrfs/transaction.c:1875 create_pending_snapshot+0x1040/0x1190 [btrfs]\n  Modules linked in: pata_acpi btrfs ata_piix libata scsi_mod virtio_net blake2b_generic xor net_failover virtio_rng failover scsi_common rng_core raid6_pq libcrc32c\n  CPU: 0 PID: 833 Comm: t_snapshot_dele Not tainted 6.7.0-rc6 #2\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014\n  RIP: 0010:create_pending_snapshot+0x1040/0x1190 [btrfs]\n  RSP: 0018:ffffa09c01337af8 EFLAGS: 00010282\n  RAX: 0000000000000000 RBX: ffff9982053e7c78 RCX: 0000000000000027\n  RDX: ffff99827dc20848 RSI: 0000000000000001 RDI: ffff99827dc20840\n  RBP: ffffa09c01337c00 R08: 0000000000000000 R09: ffffa09c01337998\n  R10: 0000000000000003 R11: ffffffffb96da248 R12: fffffffffffffffe\n  R13: ffff99820535bb28 R14: ffff99820b7bd000 R15: ffff99820381ea80\n  FS:  00007fe20aadabc0(0000) GS:ffff99827dc00000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 0000559a120b502f CR3: 00000000055b6000 CR4: 00000000000006f0\n  Call Trace:\n   \u003cTASK\u003e\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n   ? __warn+0x81/0x130\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n   ? report_bug+0x171/0x1a0\n   ? handle_bug+0x3a/0x70\n   ? exc_invalid_op+0x17/0x70\n   ? asm_exc_invalid_op+0x1a/0x20\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n   create_pending_snapshots+0x92/0xc0 [btrfs]\n   btrfs_commit_transaction+0x66b/0xf40 [btrfs]\n   btrfs_mksubvol+0x301/0x4d0 [btrfs]\n   btrfs_mksnapshot+0x80/0xb0 [btrfs]\n   __btrfs_ioctl_snap_create+0x1c2/0x1d0 [btrfs]\n   btrfs_ioctl_snap_create_v2+0xc4/0x150 [btrfs]\n   btrfs_ioctl+0x8a6/0x2650 [btrfs]\n   ? kmem_cache_free+0x22/0x340\n   ? do_sys_openat2+0x97/0xe0\n   __x64_sys_ioctl+0x97/0xd0\n   do_syscall_64+0x46/0xf0\n   entry_SYSCALL_64_after_hwframe+0x6e/0x76\n  RIP: 0033:0x7fe20abe83af\n  RSP: 002b:00007ffe6eff1360 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\n  RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fe20abe83af\n  RDX: 00007ffe6eff23c0 RSI: 0000000050009417 RDI: 0000000000000003\n  RBP: 0000000000000003 R08: 0000000000000000 R09: 00007fe20ad16cd0\n  R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\n  R13: 00007ffe6eff13c0 R14: 00007fe20ad45000 R15: 0000559a120b6d58\n   \u003c/TASK\u003e\n  ---[ end trace 0000000000000000 ]---\n  BTRFS: error (device vdc: state A) in create_pending_snapshot:1875: errno=-2 No such entry\n  BTRFS info (device vdc: state EA): forced readonly\n  BTRFS warning (device vdc: state EA): Skipping commit of aborted transaction.\n  BTRFS: error (device vdc: state EA) in cleanup_transaction:2055: errno=-2 No such entry\n\nThis happens because create_pending_snapshot() initializes the new root\nitem as a copy of the source root item. This includes the refs field,\nwhich is 0 for a deleted subvolume. The call to btrfs_insert_root()\ntherefore inserts a root with refs == 0. btrfs_get_new_fs_root() then\nfinds the root and returns -ENOENT if refs == 0, which causes\ncreate_pending_snapshot() to abort.\n\nFix it by checking the source root\u0027s refs before attempting the\nsnapshot, but after locking subvol_sem to avoid racing with deletion."
        }
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/0877497dc97834728e1b528ddf1e1c484292c29c"
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          "url": "https://git.kernel.org/stable/c/7081929ab2572920e94d70be3d332e5c9f97095a"
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      "title": "btrfs: don\u0027t abort filesystem when attempting to snapshot deleted subvolume",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26644",
    "datePublished": "2024-03-26T15:17:17.614Z",
    "dateReserved": "2024-02-19T14:20:24.138Z",
    "dateUpdated": "2024-11-05T09:13:07.138Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26644\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-26T16:15:12.137\",\"lastModified\":\"2024-11-05T10:15:36.880\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbtrfs: don\u0027t abort filesystem when attempting to snapshot deleted subvolume\\n\\nIf the source file descriptor to the snapshot ioctl refers to a deleted\\nsubvolume, we get the following abort:\\n\\n  BTRFS: Transaction aborted (error -2)\\n  WARNING: CPU: 0 PID: 833 at fs/btrfs/transaction.c:1875 create_pending_snapshot+0x1040/0x1190 [btrfs]\\n  Modules linked in: pata_acpi btrfs ata_piix libata scsi_mod virtio_net blake2b_generic xor net_failover virtio_rng failover scsi_common rng_core raid6_pq libcrc32c\\n  CPU: 0 PID: 833 Comm: t_snapshot_dele Not tainted 6.7.0-rc6 #2\\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014\\n  RIP: 0010:create_pending_snapshot+0x1040/0x1190 [btrfs]\\n  RSP: 0018:ffffa09c01337af8 EFLAGS: 00010282\\n  RAX: 0000000000000000 RBX: ffff9982053e7c78 RCX: 0000000000000027\\n  RDX: ffff99827dc20848 RSI: 0000000000000001 RDI: ffff99827dc20840\\n  RBP: ffffa09c01337c00 R08: 0000000000000000 R09: ffffa09c01337998\\n  R10: 0000000000000003 R11: ffffffffb96da248 R12: fffffffffffffffe\\n  R13: ffff99820535bb28 R14: ffff99820b7bd000 R15: ffff99820381ea80\\n  FS:  00007fe20aadabc0(0000) GS:ffff99827dc00000(0000) knlGS:0000000000000000\\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n  CR2: 0000559a120b502f CR3: 00000000055b6000 CR4: 00000000000006f0\\n  Call Trace:\\n   \u003cTASK\u003e\\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\\n   ? __warn+0x81/0x130\\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\\n   ? report_bug+0x171/0x1a0\\n   ? handle_bug+0x3a/0x70\\n   ? exc_invalid_op+0x17/0x70\\n   ? asm_exc_invalid_op+0x1a/0x20\\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\\n   create_pending_snapshots+0x92/0xc0 [btrfs]\\n   btrfs_commit_transaction+0x66b/0xf40 [btrfs]\\n   btrfs_mksubvol+0x301/0x4d0 [btrfs]\\n   btrfs_mksnapshot+0x80/0xb0 [btrfs]\\n   __btrfs_ioctl_snap_create+0x1c2/0x1d0 [btrfs]\\n   btrfs_ioctl_snap_create_v2+0xc4/0x150 [btrfs]\\n   btrfs_ioctl+0x8a6/0x2650 [btrfs]\\n   ? kmem_cache_free+0x22/0x340\\n   ? do_sys_openat2+0x97/0xe0\\n   __x64_sys_ioctl+0x97/0xd0\\n   do_syscall_64+0x46/0xf0\\n   entry_SYSCALL_64_after_hwframe+0x6e/0x76\\n  RIP: 0033:0x7fe20abe83af\\n  RSP: 002b:00007ffe6eff1360 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\\n  RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fe20abe83af\\n  RDX: 00007ffe6eff23c0 RSI: 0000000050009417 RDI: 0000000000000003\\n  RBP: 0000000000000003 R08: 0000000000000000 R09: 00007fe20ad16cd0\\n  R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\\n  R13: 00007ffe6eff13c0 R14: 00007fe20ad45000 R15: 0000559a120b6d58\\n   \u003c/TASK\u003e\\n  ---[ end trace 0000000000000000 ]---\\n  BTRFS: error (device vdc: state A) in create_pending_snapshot:1875: errno=-2 No such entry\\n  BTRFS info (device vdc: state EA): forced readonly\\n  BTRFS warning (device vdc: state EA): Skipping commit of aborted transaction.\\n  BTRFS: error (device vdc: state EA) in cleanup_transaction:2055: errno=-2 No such entry\\n\\nThis happens because create_pending_snapshot() initializes the new root\\nitem as a copy of the source root item. This includes the refs field,\\nwhich is 0 for a deleted subvolume. The call to btrfs_insert_root()\\ntherefore inserts a root with refs == 0. btrfs_get_new_fs_root() then\\nfinds the root and returns -ENOENT if refs == 0, which causes\\ncreate_pending_snapshot() to abort.\\n\\nFix it by checking the source root\u0027s refs before attempting the\\nsnapshot, but after locking subvol_sem to avoid racing with deletion.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: no aborte el sistema de archivos al intentar crear una instant\u00e1nea del subvolumen eliminado. Si el descriptor del archivo fuente de la instant\u00e1nea ioctl se refiere a un subvolumen eliminado, obtenemos la siguiente cancelaci\u00f3n: BTRFS: transacci\u00f3n abortada (error -2) ADVERTENCIA: CPU: 0 PID: 833 en fs/btrfs/transaction.c:1875 create_pending_snapshot+0x1040/0x1190 [btrfs] M\u00f3dulos vinculados en: pata_acpi btrfs ata_piix libata scsi_mod virtio_net blake2b_generic xor net_failover virtio_rng failover scsi_common rng_core raid6_pq libcrc32c CPU: 0 PID: 833 Comm: t_snapshot_dele No contaminado 6.7.0-rc6 #2 Nombre del hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 01/04/2014 RIP: 0010:create_pending_snapshot +0x1040/0x1190 [btrfs] RSP: 0018:ffffa09c01337af8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff9982053e7c78 RCX: 0000000000000027 RDX: ffff99 827dc20848 RSI: 0000000000000001 RDI: ffff99827dc20840 RBP: ffffa09c01337c00 R08: 00000000000000000 R09: ffffa09c01337998 R10: 000000000000000003 R11: ffffffffb96da248 R12: fffffffffffffffe R13: ffff99820535bb28 R14: ffff99820b7bd000 R15: ffff99820381ea80 FS: 00007fe20aadabc0(0000) GS:ffff99827dc00000(0000) knlGS:000000000000 0000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559a120b502f CR3: 00000000055b6000 CR4: 00000000000006f0 Rastreo de llamadas: \u0026lt; TAREA\u0026gt; ? create_pending_snapshot+0x1040/0x1190 [btrfs]? __advertir+0x81/0x130 ? create_pending_snapshot+0x1040/0x1190 [btrfs]? report_bug+0x171/0x1a0? handle_bug+0x3a/0x70? exc_invalid_op+0x17/0x70? asm_exc_invalid_op+0x1a/0x20? create_pending_snapshot+0x1040/0x1190 [btrfs]? create_pending_snapshot+0x1040/0x1190 [btrfs] create_pending_snapshots+0x92/0xc0 [btrfs] btrfs_commit_transaction+0x66b/0xf40 [btrfs] btrfs_mksubvol+0x301/0x4d0 [btrfs] btrfs_mksnapshot+0x8 0/0xb0 [btrfs] __btrfs_ioctl_snap_create+0x1c2/0x1d0 [btrfs] btrfs_ioctl_snap_create_v2+ 0xc4/0x150 [btrfs] btrfs_ioctl+0x8a6/0x2650 [btrfs] ? kmem_cache_free+0x22/0x340? do_sys_openat2+0x97/0xe0 __x64_sys_ioctl+0x97/0xd0 do_syscall_64+0x46/0xf0 Entry_SYSCALL_64_after_hwframe+0x6e/0x76 RIP: 0033:0x7fe20abe83af RSP: 002b:00007ffe6eff13 60 EFLAGS: 00000246 ORIG_RAX: 00000000000000010 RAX: ffffffffffffffda RBX: 00000000000000004 RCX: 00007fe20abe83af RDX: 00007ffe6eff23c0 RSI: 0000000050009417 RDI: 0000000000000003 RBP: 0000000000000003 R08: 0000000000000000 R09: 00007fe20ad16cd0 R10: 0000000000000000 R11: 00 00000000000246 R12: 0000000000000000 R13: 00007ffe6eff13c0 R14: 00007fe20ad45000 R15: 0000559a120b6d58  ---[ final de seguimiento 0000000000000000 ]--- BTRFS: error ( dispositivo vdc: estado A) en create_pending_snapshot:1875: errno=-2 No existe tal entrada Informaci\u00f3n BTRFS (dispositivo vdc: estado EA): solo lectura forzada Advertencia BTRFS (dispositivo vdc: estado EA): omitir confirmaci\u00f3n de transacci\u00f3n abortada. BTRFS: error (dispositivo vdc: estado EA) en cleanup_transaction:2055: errno=-2 No existe tal entrada. Esto sucede porque create_pending_snapshot() inicializa el nuevo elemento ra\u00edz como una copia del elemento ra\u00edz de origen. Esto incluye el campo de referencias, que es 0 para un subvolumen eliminado. Por lo tanto, la llamada a btrfs_insert_root() inserta una ra\u00edz con refs == 0. btrfs_get_new_fs_root() luego encuentra la ra\u00edz y devuelve -ENOENT si refs == 0, lo que hace que create_pending_snapshot() aborte. Solucionelo verificando las referencias de la ra\u00edz de origen antes de intentar la instant\u00e1nea, pero despu\u00e9s de bloquear subvol_sem para evitar correr con la eliminaci\u00f3n.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0877497dc97834728e1b528ddf1e1c484292c29c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2bdf872bcfe629a6202ffd6641615a8ed00e8464\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6e6bca99e8d88d989a7cde4c064abea552d5219b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7081929ab2572920e94d70be3d332e5c9f97095a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d8680b722f0ff6d7a01ddacc1844e0d52354d6ff\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ec794a7528199e1be6d47bec03f4755aa75df256\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.