fkie_cve-2022-49400
Vulnerability from fkie_nvd
Published
2025-02-26 07:01
Modified
2025-04-17 20:49
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: md: Don't set mddev private to NULL in raid0 pers->free In normal stop process, it does like this: do_md_stop | __md_stop (pers->free(); mddev->private=NULL) | md_free (free mddev) __md_stop sets mddev->private to NULL after pers->free. The raid device will be stopped and mddev memory is free. But in reshape, it doesn't free the mddev and mddev will still be used in new raid. In reshape, it first sets mddev->private to new_pers and then runs old_pers->free(). Now raid0 sets mddev->private to NULL in raid0_free. The new raid can't work anymore. It will panic when dereference mddev->private because of NULL pointer dereference. It can panic like this: [63010.814972] kernel BUG at drivers/md/raid10.c:928! [63010.819778] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [63010.825011] CPU: 3 PID: 44437 Comm: md0_resync Kdump: loaded Not tainted 5.14.0-86.el9.x86_64 #1 [63010.833789] Hardware name: Dell Inc. PowerEdge R6415/07YXFK, BIOS 1.15.0 09/11/2020 [63010.841440] RIP: 0010:raise_barrier+0x161/0x170 [raid10] [63010.865508] RSP: 0018:ffffc312408bbc10 EFLAGS: 00010246 [63010.870734] RAX: 0000000000000000 RBX: ffffa00bf7d39800 RCX: 0000000000000000 [63010.877866] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffa00bf7d39800 [63010.884999] RBP: 0000000000000000 R08: fffffa4945e74400 R09: 0000000000000000 [63010.892132] R10: ffffa00eed02f798 R11: 0000000000000000 R12: ffffa00bbc435200 [63010.899266] R13: ffffa00bf7d39800 R14: 0000000000000400 R15: 0000000000000003 [63010.906399] FS: 0000000000000000(0000) GS:ffffa00eed000000(0000) knlGS:0000000000000000 [63010.914485] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [63010.920229] CR2: 00007f5cfbe99828 CR3: 0000000105efe000 CR4: 00000000003506e0 [63010.927363] Call Trace: [63010.929822] ? bio_reset+0xe/0x40 [63010.933144] ? raid10_alloc_init_r10buf+0x60/0xa0 [raid10] [63010.938629] raid10_sync_request+0x756/0x1610 [raid10] [63010.943770] md_do_sync.cold+0x3e4/0x94c [63010.947698] md_thread+0xab/0x160 [63010.951024] ? md_write_inc+0x50/0x50 [63010.954688] kthread+0x149/0x170 [63010.957923] ? set_kthread_struct+0x40/0x40 [63010.962107] ret_from_fork+0x22/0x30 Removing the code that sets mddev->private to NULL in raid0 can fix problem.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0f2571ad7a30ff6b33cde142439f9378669f8b4fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7da3454a65f8a56e65dfb44fa0ccac08cbc2f5a1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b7a51df785031cc49caf1c59766ca89cfa97b54bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f63fd1e0e0fc158023cc67ea6a07e278019061baPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "AF862C56-763E-4CF4-815B-F3DE178BA5BB",
              "versionEndExcluding": "5.15.46",
              "versionStartIncluding": "5.15.17",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F4B0E194-E4BB-42EF-AD72-E601CF20599D",
              "versionEndExcluding": "5.17.14",
              "versionStartIncluding": "5.16.3",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8E122216-2E9E-4B3E-B7B8-D575A45BA3C2",
              "versionEndExcluding": "5.18.3",
              "versionStartIncluding": "5.18",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd: Don\u0027t set mddev private to NULL in raid0 pers-\u003efree\n\nIn normal stop process, it does like this:\n   do_md_stop\n      |\n   __md_stop (pers-\u003efree(); mddev-\u003eprivate=NULL)\n      |\n   md_free (free mddev)\n__md_stop sets mddev-\u003eprivate to NULL after pers-\u003efree. The raid device\nwill be stopped and mddev memory is free. But in reshape, it doesn\u0027t\nfree the mddev and mddev will still be used in new raid.\n\nIn reshape, it first sets mddev-\u003eprivate to new_pers and then runs\nold_pers-\u003efree(). Now raid0 sets mddev-\u003eprivate to NULL in raid0_free.\nThe new raid can\u0027t work anymore. It will panic when dereference\nmddev-\u003eprivate because of NULL pointer dereference.\n\nIt can panic like this:\n[63010.814972] kernel BUG at drivers/md/raid10.c:928!\n[63010.819778] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI\n[63010.825011] CPU: 3 PID: 44437 Comm: md0_resync Kdump: loaded Not tainted 5.14.0-86.el9.x86_64 #1\n[63010.833789] Hardware name: Dell Inc. PowerEdge R6415/07YXFK, BIOS 1.15.0 09/11/2020\n[63010.841440] RIP: 0010:raise_barrier+0x161/0x170 [raid10]\n[63010.865508] RSP: 0018:ffffc312408bbc10 EFLAGS: 00010246\n[63010.870734] RAX: 0000000000000000 RBX: ffffa00bf7d39800 RCX: 0000000000000000\n[63010.877866] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffa00bf7d39800\n[63010.884999] RBP: 0000000000000000 R08: fffffa4945e74400 R09: 0000000000000000\n[63010.892132] R10: ffffa00eed02f798 R11: 0000000000000000 R12: ffffa00bbc435200\n[63010.899266] R13: ffffa00bf7d39800 R14: 0000000000000400 R15: 0000000000000003\n[63010.906399] FS:  0000000000000000(0000) GS:ffffa00eed000000(0000) knlGS:0000000000000000\n[63010.914485] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[63010.920229] CR2: 00007f5cfbe99828 CR3: 0000000105efe000 CR4: 00000000003506e0\n[63010.927363] Call Trace:\n[63010.929822]  ? bio_reset+0xe/0x40\n[63010.933144]  ? raid10_alloc_init_r10buf+0x60/0xa0 [raid10]\n[63010.938629]  raid10_sync_request+0x756/0x1610 [raid10]\n[63010.943770]  md_do_sync.cold+0x3e4/0x94c\n[63010.947698]  md_thread+0xab/0x160\n[63010.951024]  ? md_write_inc+0x50/0x50\n[63010.954688]  kthread+0x149/0x170\n[63010.957923]  ? set_kthread_struct+0x40/0x40\n[63010.962107]  ret_from_fork+0x22/0x30\n\nRemoving the code that sets mddev-\u003eprivate to NULL in raid0 can fix\nproblem."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: md: No establezca mddev private en NULL en raid0 pers-\u0026gt;free En el proceso de detenci\u00f3n normal, hace lo siguiente: do_md_stop | __md_stop (pers-\u0026gt;free(); mddev-\u0026gt;private=NULL) | md_free (free mddev) __md_stop establece mddev-\u0026gt;private en NULL despu\u00e9s de pers-\u0026gt;free. El dispositivo raid se detendr\u00e1 y la memoria mddev estar\u00e1 libre. Pero en reshape, no libera el mddev y mddev se seguir\u00e1 usando en el nuevo raid. En reshape, primero establece mddev-\u0026gt;private en new_pers y luego ejecuta old_pers-\u0026gt;free(). Ahora raid0 establece mddev-\u0026gt;private en NULL en raid0_free. El nuevo raid ya no puede funcionar. Entrar\u00e1 en p\u00e1nico cuando desreferencia mddev-\u0026gt;private debido a la desreferencia del puntero NULL. Puede entrar en p\u00e1nico de esta manera: [63010.814972] \u00a1ERROR del kernel en drivers/md/raid10.c:928! [63010.819778] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [63010.825011] CPU: 3 PID: 44437 Comm: md0_resync Kdump: loaded Not tainted 5.14.0-86.el9.x86_64 #1 [63010.833789] Hardware name: Dell Inc. PowerEdge R6415/07YXFK, BIOS 1.15.0 09/11/2020 [63010.841440] RIP: 0010:raise_barrier+0x161/0x170 [raid10] [63010.865508] RSP: 0018:ffffc312408bbc10 EFLAGS: 00010246 [63010.870734] RAX: 0000000000000000 RBX: ffffa00bf7d39800 RCX: 0000000000000000 [63010.877866] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffa00bf7d39800 [63010.884999] RBP: 0000000000000000 R08: fffffa4945e74400 R09: 0000000000000000 [63010.892132] R10: ffffa00eed02f798 R11: 0000000000000000 R12: ffffa00bbc435200 [63010.899266] R13: ffffa00bf7d39800 R14: 0000000000000400 R15: 0000000000000003 [63010.906399] FS: 0000000000000000(0000) GS:ffffa00eed000000(0000) knlGS:0000000000000000 [63010.914485] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [63010.920229] CR2: 00007f5cfbe99828 CR3: 0000000105efe000 CR4: 00000000003506e0 [63010.927363] Call Trace: [63010.929822] ? bio_reset+0xe/0x40 [63010.933144] ? raid10_alloc_init_r10buf+0x60/0xa0 [raid10] [63010.938629] raid10_sync_request+0x756/0x1610 [raid10] [63010.943770] md_do_sync.cold+0x3e4/0x94c [63010.947698] md_thread+0xab/0x160 [63010.951024] ? md_write_inc+0x50/0x50 [63010.954688] kthread+0x149/0x170 [63010.957923] ? set_kthread_struct+0x40/0x40 [63010.962107] ret_from_fork+0x22/0x30 Eliminar el c\u00f3digo que establece mddev-\u0026gt;private en NULL en raid0 puede solucionar el problema."
    }
  ],
  "id": "CVE-2022-49400",
  "lastModified": "2025-04-17T20:49:08.000",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-02-26T07:01:16.570",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/0f2571ad7a30ff6b33cde142439f9378669f8b4f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/7da3454a65f8a56e65dfb44fa0ccac08cbc2f5a1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/b7a51df785031cc49caf1c59766ca89cfa97b54b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/f63fd1e0e0fc158023cc67ea6a07e278019061ba"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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