iommu/iova: Fix alloc iova overflows issue

{
  "id": "4b7c4c6dcb51dc8db59e14cf34e24b03e347b72440b6aa97eb0cd1fc642fc088",
  "url": "https://osv.dev/vulnerability/CVE-2023-52910",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "iommu/iova: Fix alloc iova overflows issue",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: iommu/iova: Fix alloc iova overflows issue In __alloc_and_insert_iova_range, there is an issue that retry_pfn overflows. The value of iovad->anchor.pfn_hi is ~0UL, then when iovad->cached_node is iovad->anchor, curr_iova->pfn_hi + 1 will overflow. As a result, if the retry logic is executed, low_pfn is updated to 0, and then new_pfn < low_pfn returns false to make the allocation successful. This issue occurs in the following two situations: 1. The first iova size exceeds the domain size. When initializing iova domain, iovad->cached_node is assigned as iovad->anchor. For example, the iova domain size is 10M, start_pfn is 0x1_F000_0000, and the iova size allocated for the first time is 11M. The following is the log information, new->pfn_lo is smaller than iovad->cached_node. Example log as follows: [ 223.798112][T1705487] sh: [name:iova&]__alloc_and_insert_iova_range start_pfn:0x1f0000,retry_pfn:0x0,size:0xb00,limit_pfn:0x1f0a00 [ 223.799590][T1705487] sh: [name:iova&]__alloc_and_insert_iova_range success start_pfn:0x1f0000,new->pfn_lo:0x1efe00,new->pfn_hi:0x1f08ff 2. The node with the largest iova->pfn_lo value in the iova domain is deleted, iovad->cached_node will be updated to iovad->anchor, and then the alloc iova size exceeds the maximum iova size that can be allocated in the domain. After judging that retry_pfn is less than limit_pfn, call retry_pfn+1 to fix the overflow issue.",
    "evidence": "osv:CVE-2023-52910",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.89",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-52910",
      "aliases": [
        "CVE-2023-52910"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4e89dce725213d3d0b0475211b500eda4ef4bf2f"
                },
                {
                  "fixed": "c929a230c84441e400c32e7b7b4ab763711fb63e"
                },
                {
                  "fixed": "61cbf790e7329ed78877560be7136f0b911bba7f"
                },
                {
                  "fixed": "dcdb3ba7e2a8caae7bfefd603bc22fd0ce9a389c"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52910.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.89"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.7"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52910.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.632120504Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/61cbf790e7329ed78877560be7136f0b911bba7f",
        "https://git.kernel.org/stable/c/c929a230c84441e400c32e7b7b4ab763711fb63e",
        "https://git.kernel.org/stable/c/dcdb3ba7e2a8caae7bfefd603bc22fd0ce9a389c",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52910.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-52910",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52910.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-52910",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 499301,
  "published_at": "2024-08-21T06:10:51.337+00:00"
}