nvd-json-data-feeds/CVE-2024/CVE-2024-502xx/CVE-2024-50225.json

{
  "id": "CVE-2024-50225",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-11-09T11:15:07.990",
  "lastModified": "2024-11-13T19:21:44.323",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix error propagation of split bios\n\nThe purpose of btrfs_bbio_propagate_error() shall be propagating an error\nof split bio to its original btrfs_bio, and tell the error to the upper\nlayer. However, it's not working well on some cases.\n\n* Case 1. Immediate (or quick) end_bio with an error\n\nWhen btrfs sends btrfs_bio to mirrored devices, btrfs calls\nbtrfs_bio_end_io() when all the mirroring bios are completed. If that\nbtrfs_bio was split, it is from btrfs_clone_bioset and its end_io function\nis btrfs_orig_write_end_io. For this case, btrfs_bbio_propagate_error()\naccesses the orig_bbio's bio context to increase the error count.\n\nThat works well in most cases. However, if the end_io is called enough\nfast, orig_bbio's (remaining part after split) bio context may not be\nproperly set at that time. Since the bio context is set when the orig_bbio\n(the last btrfs_bio) is sent to devices, that might be too late for earlier\nsplit btrfs_bio's completion.  That will result in NULL pointer\ndereference.\n\nThat bug is easily reproducible by running btrfs/146 on zoned devices [1]\nand it shows the following trace.\n\n[1] You need raid-stripe-tree feature as it create \"-d raid0 -m raid1\" FS.\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000020\n  #PF: supervisor read access in kernel mode\n  #PF: error_code(0x0000) - not-present page\n  PGD 0 P4D 0\n  Oops: Oops: 0000 [#1] PREEMPT SMP PTI\n  CPU: 1 UID: 0 PID: 13 Comm: kworker/u32:1 Not tainted 6.11.0-rc7-BTRFS-ZNS+ #474\n  Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011\n  Workqueue: writeback wb_workfn (flush-btrfs-5)\n  RIP: 0010:btrfs_bio_end_io+0xae/0xc0 [btrfs]\n  BTRFS error (device dm-0): bdev /dev/mapper/error-test errs: wr 2, rd 0, flush 0, corrupt 0, gen 0\n  RSP: 0018:ffffc9000006f248 EFLAGS: 00010246\n  RAX: 0000000000000000 RBX: ffff888005a7f080 RCX: ffffc9000006f1dc\n  RDX: 0000000000000000 RSI: 000000000000000a RDI: ffff888005a7f080\n  RBP: ffff888011dfc540 R08: 0000000000000000 R09: 0000000000000001\n  R10: ffffffff82e508e0 R11: 0000000000000005 R12: ffff88800ddfbe58\n  R13: ffff888005a7f080 R14: ffff888005a7f158 R15: ffff888005a7f158\n  FS:  0000000000000000(0000) GS:ffff88803ea80000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 0000000000000020 CR3: 0000000002e22006 CR4: 0000000000370ef0\n  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n  Call Trace:\n   <TASK>\n   ? __die_body.cold+0x19/0x26\n   ? page_fault_oops+0x13e/0x2b0\n   ? _printk+0x58/0x73\n   ? do_user_addr_fault+0x5f/0x750\n   ? exc_page_fault+0x76/0x240\n   ? asm_exc_page_fault+0x22/0x30\n   ? btrfs_bio_end_io+0xae/0xc0 [btrfs]\n   ? btrfs_log_dev_io_error+0x7f/0x90 [btrfs]\n   btrfs_orig_write_end_io+0x51/0x90 [btrfs]\n   dm_submit_bio+0x5c2/0xa50 [dm_mod]\n   ? find_held_lock+0x2b/0x80\n   ? blk_try_enter_queue+0x90/0x1e0\n   __submit_bio+0xe0/0x130\n   ? ktime_get+0x10a/0x160\n   ? lockdep_hardirqs_on+0x74/0x100\n   submit_bio_noacct_nocheck+0x199/0x410\n   btrfs_submit_bio+0x7d/0x150 [btrfs]\n   btrfs_submit_chunk+0x1a1/0x6d0 [btrfs]\n   ? lockdep_hardirqs_on+0x74/0x100\n   ? __folio_start_writeback+0x10/0x2c0\n   btrfs_submit_bbio+0x1c/0x40 [btrfs]\n   submit_one_bio+0x44/0x60 [btrfs]\n   submit_extent_folio+0x13f/0x330 [btrfs]\n   ? btrfs_set_range_writeback+0xa3/0xd0 [btrfs]\n   extent_writepage_io+0x18b/0x360 [btrfs]\n   extent_write_locked_range+0x17c/0x340 [btrfs]\n   ? __pfx_end_bbio_data_write+0x10/0x10 [btrfs]\n   run_delalloc_cow+0x71/0xd0 [btrfs]\n   btrfs_run_delalloc_range+0x176/0x500 [btrfs]\n   ? find_lock_delalloc_range+0x119/0x260 [btrfs]\n   writepage_delalloc+0x2ab/0x480 [btrfs]\n   extent_write_cache_pages+0x236/0x7d0 [btrfs]\n   btrfs_writepages+0x72/0x130 [btrfs]\n   do_writepages+0xd4/0x240\n   ? find_held_lock+0x2b/0x80\n   ? wbc_attach_and_unlock_inode+0x12c/0x290\n   ? wbc_attach_and_unlock_inode+0x12c/0x29\n---truncated---"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: corregir la propagaci\u00f3n de errores de bios divididas El prop\u00f3sito de btrfs_bbio_propagate_error() debe ser propagar un error de bio dividida a su btrfs_bio original y comunicar el error a la capa superior. Sin embargo, no est\u00e1 funcionando bien en algunos casos. * Caso 1. End_bio inmediato (o r\u00e1pido) con un error Cuando btrfs env\u00eda btrfs_bio a dispositivos reflejados, btrfs llama a btrfs_bio_end_io() cuando se completan todos los bios reflejados. Si ese btrfs_bio se dividi\u00f3, es de btrfs_clone_bioset y su funci\u00f3n end_io es btrfs_orig_write_end_io. Para este caso, btrfs_bbio_propagate_error() accede al contexto bio de orig_bbio para aumentar el recuento de errores. Eso funciona bien en la mayor\u00eda de los casos. Sin embargo, si se llama a end_io lo suficientemente r\u00e1pido, es posible que el contexto bio de orig_bbio (la parte restante despu\u00e9s de la divisi\u00f3n) no se configure correctamente en ese momento. Dado que el contexto bio se configura cuando se env\u00eda orig_bbio (el \u00faltimo btrfs_bio) a los dispositivos, puede que sea demasiado tarde para que se complete la divisi\u00f3n anterior de btrfs_bio. Eso dar\u00e1 como resultado la desreferencia del puntero NULL. Ese error se puede reproducir f\u00e1cilmente ejecutando btrfs/146 en dispositivos zonificados [1] y muestra el siguiente rastro. [1] Necesita la funci\u00f3n raid-stripe-tree, ya que crea el sistema de archivos \"-d raid0 -m raid1\". ERROR: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000020 #PF: acceso de lectura del supervisor en modo kernel #PF: error_code(0x0000) - p\u00e1gina no presente PGD 0 P4D 0 Oops: Oops: 0000 [#1] PREEMPT SMP PTI CPU: 1 UID: 0 PID: 13 Comm: kworker/u32:1 No contaminado 6.11.0-rc7-BTRFS-ZNS+ #474 Nombre del hardware: Bochs Bochs, BIOS Bochs 01/01/2011 Cola de trabajo: escritura diferida wb_workfn (flush-btrfs-5) RIP: 0010:btrfs_bio_end_io+0xae/0xc0 [btrfs] Error BTRFS (dispositivo dm-0): bdev /dev/mapper/error-test errores: wr 2, rd 0, vaciado 0, corrupto 0, generaci\u00f3n 0 RSP: 0018:ffffc9000006f248 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888005a7f080 RCX: ffffc9000006f1dc RDX: 0000000000000000 RSI: 000000000000000a RDI: ffff888005a7f080 RBP: ffff888011dfc540 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff82e508e0 R11: 0000000000000005 R12: ffff88800ddfbe58 R13: ffff888005a7f080 R14: ffff888005a7f158 R15: ffff888005a7f158 FS: 000000000000000(0000) GS:ffff88803ea80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000020 CR3: 0000000002e22006 CR4: 0000000000370ef0 DR0: 00000000000000000 DR1: 00000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Seguimiento de llamadas:  ? __die_body.cold+0x19/0x26 ? page_fault_oops+0x13e/0x2b0 ? _printk+0x58/0x73 ? do_user_addr_fault+0x5f/0x750 ? btrfs_log_dev_io_error+0x7f/0x90 [btrfs] btrfs_orig_write_end_io+0x51/0x90 [btrfs] dm_submit_bio+0x5c2/0xa50 [dm_mod] ? blk_try_enter_queue+0x90/0x1e0 __submit_bio+0xe0/0x130 ? ktime_get+0x10a/0x160 ? lockdep_hardirqs_on+0x74/0x100 submit_bio_noacct_nocheck+0x199/0x410 btrfs_submit_bio+0x7d/0x150 [btrfs] btrfs_submit_chunk+0x1a1/0x6d0 [btrfs]? lockdep_hardirqs_on+0x74/0x100? __folio_start_writeback+0x10/0x2c0 btrfs_submit_bbio+0x1c/0x40 [btrfs] submit_one_bio+0x44/0x60 [btrfs] submit_extent_folio+0x13f/0x330 [btrfs] ? btrfs_set_range_writeback+0xa3/0xd0 [btrfs] extend_writepage_io+0x18b/0x360 [btrfs] extend_write_locked_range+0x17c/0x340 [btrfs] ? __pfx_end_bbio_data_write+0x10/0x10 [btrfs] run_delalloc_cow+0x71/0xd0 [btrfs] btrfs_run_delalloc_range+0x176/0x500 [btrfs] ? buscar_bloqueo_desbloqueado_rango+0x119/0x260 [btrfs] escribir_p\u00e1gina_desbloqueado+0x2ab/0x480 [btrfs] extensi\u00f3n_escritura_p\u00e1ginas_cach\u00e9+0x236/0x7d0 [btrfs] btrfs_escritura_p\u00e1ginas+0x72/0x130 [btrfs] hacer_escritura_p\u00e1ginas+0xd4/0x240 ? buscar_bloqueo_retenido+0x2b/0x80 ? wbc_adjuntar_y_desbloquear_inodo+0x12c/0x290 ? wbc_adjuntar_y_desbloquear_inodo+0x12c/0x29 ---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": "CWE-476"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
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  "references": [
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      "url": "https://git.kernel.org/stable/c/22833d89b780ba0f9f66e19c477e7decf638edce",
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}