CVE-2024-26962 (GCVE-0-2024-26962)
Vulnerability from cvelistv5
Published
2024-05-01 05:19
Modified
2026-05-23 15:40
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: dm-raid456, md/raid456: fix a deadlock for dm-raid456 while io concurrent with reshape For raid456, if reshape is still in progress, then IO across reshape position will wait for reshape to make progress. However, for dm-raid, in following cases reshape will never make progress hence IO will hang: 1) the array is read-only; 2) MD_RECOVERY_WAIT is set; 3) MD_RECOVERY_FROZEN is set; After commit c467e97f079f ("md/raid6: use valid sector values to determine if an I/O should wait on the reshape") fix the problem that IO across reshape position doesn't wait for reshape, the dm-raid test shell/lvconvert-raid-reshape.sh start to hang: [root@fedora ~]# cat /proc/979/stack [<0>] wait_woken+0x7d/0x90 [<0>] raid5_make_request+0x929/0x1d70 [raid456] [<0>] md_handle_request+0xc2/0x3b0 [md_mod] [<0>] raid_map+0x2c/0x50 [dm_raid] [<0>] __map_bio+0x251/0x380 [dm_mod] [<0>] dm_submit_bio+0x1f0/0x760 [dm_mod] [<0>] __submit_bio+0xc2/0x1c0 [<0>] submit_bio_noacct_nocheck+0x17f/0x450 [<0>] submit_bio_noacct+0x2bc/0x780 [<0>] submit_bio+0x70/0xc0 [<0>] mpage_readahead+0x169/0x1f0 [<0>] blkdev_readahead+0x18/0x30 [<0>] read_pages+0x7c/0x3b0 [<0>] page_cache_ra_unbounded+0x1ab/0x280 [<0>] force_page_cache_ra+0x9e/0x130 [<0>] page_cache_sync_ra+0x3b/0x110 [<0>] filemap_get_pages+0x143/0xa30 [<0>] filemap_read+0xdc/0x4b0 [<0>] blkdev_read_iter+0x75/0x200 [<0>] vfs_read+0x272/0x460 [<0>] ksys_read+0x7a/0x170 [<0>] __x64_sys_read+0x1c/0x30 [<0>] do_syscall_64+0xc6/0x230 [<0>] entry_SYSCALL_64_after_hwframe+0x6c/0x74 This is because reshape can't make progress. For md/raid, the problem doesn't exist because register new sync_thread doesn't rely on the IO to be done any more: 1) If array is read-only, it can switch to read-write by ioctl/sysfs; 2) md/raid never set MD_RECOVERY_WAIT; 3) If MD_RECOVERY_FROZEN is set, mddev_suspend() doesn't hold 'reconfig_mutex', hence it can be cleared and reshape can continue by sysfs api 'sync_action'. However, I'm not sure yet how to avoid the problem in dm-raid yet. This patch on the one hand make sure raid_message() can't change sync_thread() through raid_message() after presuspend(), on the other hand detect the above 3 cases before wait for IO do be done in dm_suspend(), and let dm-raid requeue those IO.
References
Impacted products
Vendor Product Version
Linux Linux Version: c467e97f079f0019870c314996fae952cc768e82
Version: c467e97f079f0019870c314996fae952cc768e82
Version: c467e97f079f0019870c314996fae952cc768e82
Version: 515d971cd26a40f710490d1566783f9c62b46d61
Version: 4ce431c297558e30baa9226243a15d818320742b
Version: 6.1.68   ≤
Version: 6.6.7   ≤
Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T00:21:05.628Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/5943a34bf6bab5801e08a55f63e1b8d5bc90dae1"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/a8d249d770cb357d16a2097b548d2e4c1c137304"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/41425f96d7aa59bc865f60f5dda3d7697b555677"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-26962",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:45:26.664282Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:33:47.573Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-raid.c",
            "drivers/md/md.c",
            "drivers/md/md.h",
            "drivers/md/raid5.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5943a34bf6bab5801e08a55f63e1b8d5bc90dae1",
              "status": "affected",
              "version": "c467e97f079f0019870c314996fae952cc768e82",
              "versionType": "git"
            },
            {
              "lessThan": "a8d249d770cb357d16a2097b548d2e4c1c137304",
              "status": "affected",
              "version": "c467e97f079f0019870c314996fae952cc768e82",
              "versionType": "git"
            },
            {
              "lessThan": "41425f96d7aa59bc865f60f5dda3d7697b555677",
              "status": "affected",
              "version": "c467e97f079f0019870c314996fae952cc768e82",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "515d971cd26a40f710490d1566783f9c62b46d61",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4ce431c297558e30baa9226243a15d818320742b",
              "versionType": "git"
            },
            {
              "lessThan": "6.2",
              "status": "affected",
              "version": "6.1.68",
              "versionType": "semver"
            },
            {
              "lessThan": "6.7",
              "status": "affected",
              "version": "6.6.7",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-raid.c",
            "drivers/md/md.c",
            "drivers/md/md.h",
            "drivers/md/raid5.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "lessThan": "6.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.7.12",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8.3",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.9",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.1.68",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.6.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm-raid456, md/raid456: fix a deadlock for dm-raid456 while io concurrent with reshape\n\nFor raid456, if reshape is still in progress, then IO across reshape\nposition will wait for reshape to make progress. However, for dm-raid,\nin following cases reshape will never make progress hence IO will hang:\n\n1) the array is read-only;\n2) MD_RECOVERY_WAIT is set;\n3) MD_RECOVERY_FROZEN is set;\n\nAfter commit c467e97f079f (\"md/raid6: use valid sector values to determine\nif an I/O should wait on the reshape\") fix the problem that IO across\nreshape position doesn\u0027t wait for reshape, the dm-raid test\nshell/lvconvert-raid-reshape.sh start to hang:\n\n[root@fedora ~]# cat /proc/979/stack\n[\u003c0\u003e] wait_woken+0x7d/0x90\n[\u003c0\u003e] raid5_make_request+0x929/0x1d70 [raid456]\n[\u003c0\u003e] md_handle_request+0xc2/0x3b0 [md_mod]\n[\u003c0\u003e] raid_map+0x2c/0x50 [dm_raid]\n[\u003c0\u003e] __map_bio+0x251/0x380 [dm_mod]\n[\u003c0\u003e] dm_submit_bio+0x1f0/0x760 [dm_mod]\n[\u003c0\u003e] __submit_bio+0xc2/0x1c0\n[\u003c0\u003e] submit_bio_noacct_nocheck+0x17f/0x450\n[\u003c0\u003e] submit_bio_noacct+0x2bc/0x780\n[\u003c0\u003e] submit_bio+0x70/0xc0\n[\u003c0\u003e] mpage_readahead+0x169/0x1f0\n[\u003c0\u003e] blkdev_readahead+0x18/0x30\n[\u003c0\u003e] read_pages+0x7c/0x3b0\n[\u003c0\u003e] page_cache_ra_unbounded+0x1ab/0x280\n[\u003c0\u003e] force_page_cache_ra+0x9e/0x130\n[\u003c0\u003e] page_cache_sync_ra+0x3b/0x110\n[\u003c0\u003e] filemap_get_pages+0x143/0xa30\n[\u003c0\u003e] filemap_read+0xdc/0x4b0\n[\u003c0\u003e] blkdev_read_iter+0x75/0x200\n[\u003c0\u003e] vfs_read+0x272/0x460\n[\u003c0\u003e] ksys_read+0x7a/0x170\n[\u003c0\u003e] __x64_sys_read+0x1c/0x30\n[\u003c0\u003e] do_syscall_64+0xc6/0x230\n[\u003c0\u003e] entry_SYSCALL_64_after_hwframe+0x6c/0x74\n\nThis is because reshape can\u0027t make progress.\n\nFor md/raid, the problem doesn\u0027t exist because register new sync_thread\ndoesn\u0027t rely on the IO to be done any more:\n\n1) If array is read-only, it can switch to read-write by ioctl/sysfs;\n2) md/raid never set MD_RECOVERY_WAIT;\n3) If MD_RECOVERY_FROZEN is set, mddev_suspend() doesn\u0027t hold\n   \u0027reconfig_mutex\u0027, hence it can be cleared and reshape can continue by\n   sysfs api \u0027sync_action\u0027.\n\nHowever, I\u0027m not sure yet how to avoid the problem in dm-raid yet. This\npatch on the one hand make sure raid_message() can\u0027t change\nsync_thread() through raid_message() after presuspend(), on the other\nhand detect the above 3 cases before wait for IO do be done in\ndm_suspend(), and let dm-raid requeue those IO."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T15:40:44.179Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5943a34bf6bab5801e08a55f63e1b8d5bc90dae1"
        },
        {
          "url": "https://git.kernel.org/stable/c/a8d249d770cb357d16a2097b548d2e4c1c137304"
        },
        {
          "url": "https://git.kernel.org/stable/c/41425f96d7aa59bc865f60f5dda3d7697b555677"
        }
      ],
      "title": "dm-raid456, md/raid456: fix a deadlock for dm-raid456 while io concurrent with reshape",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26962",
    "datePublished": "2024-05-01T05:19:20.579Z",
    "dateReserved": "2024-02-19T14:20:24.201Z",
    "dateUpdated": "2026-05-23T15:40:44.179Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • 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.