riscv: mm: add missing memcpy in kasan_init

{
  "id": "6942cd3b9bf7fc35239f8dde1936f25ef38e6acf7f75dce9a3627ed6275abcc3",
  "url": "https://osv.dev/vulnerability/CVE-2022-50657",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "riscv: mm: add missing memcpy in kasan_init",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: riscv: mm: add missing memcpy in kasan_init Hi Atish, It seems that the panic is due to the missing memcpy during kasan_init. Could you please check whether this patch is helpful? When doing kasan_populate, the new allocated base_pud/base_p4d should contain kasan_early_shadow_{pud, p4d}'s content. Add the missing memcpy to avoid page fault when read/write kasan shadow region. Tested on: - qemu with sv57 and CONFIG_KASAN on. - qemu with sv48 and CONFIG_KASAN on.",
    "evidence": "osv:CVE-2022-50657",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.0.7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-50657",
      "aliases": [
        "CVE-2022-50657"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "8fbdccd2b17335e1881a23865e98c63fcc345938"
                },
                {
                  "fixed": "ff0f6becf3a6f817838b6f80a2c9cca43dce0576"
                },
                {
                  "fixed": "9f2ac64d6ca60db99132e08628ac2899f956a0ec"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50657.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.18.0"
                },
                {
                  "fixed": "6.0.7"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50657.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.645776109Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/9f2ac64d6ca60db99132e08628ac2899f956a0ec",
        "https://git.kernel.org/stable/c/ff0f6becf3a6f817838b6f80a2c9cca43dce0576",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50657.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50657",
        "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/2022/50xxx/CVE-2022-50657.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-50657",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 497787,
  "published_at": "2025-12-09T01:29:04.968+00:00"
}