perf/x86/amd/uncore: Fix memory leak for events array

{
  "id": "9323804c108e891a943e5bd787830bee8a335371407779b5b916372dfe8f200e",
  "url": "https://osv.dev/vulnerability/CVE-2022-49784",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "perf/x86/amd/uncore: Fix memory leak for events array",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: perf/x86/amd/uncore: Fix memory leak for events array When a CPU comes online, the per-CPU NB and LLC uncore contexts are freed but not the events array within the context structure. This causes a memory leak as identified by the kmemleak detector. [...] unreferenced object 0xffff8c5944b8e320 (size 32): comm \"swapper/0\", pid 1, jiffies 4294670387 (age 151.072s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000000759fb79>] amd_uncore_cpu_up_prepare+0xaf/0x230 [<00000000ddc9e126>] cpuhp_invoke_callback+0x2cf/0x470 [<0000000093e727d4>] cpuhp_issue_call+0x14d/0x170 [<0000000045464d54>] __cpuhp_setup_state_cpuslocked+0x11e/0x330 [<0000000069f67cbd>] __cpuhp_setup_state+0x6b/0x110 [<0000000015365e0f>] amd_uncore_init+0x260/0x321 [<00000000089152d2>] do_one_initcall+0x3f/0x1f0 [<000000002d0bd18d>] kernel_init_freeable+0x1ca/0x212 [<0000000030be8dde>] kernel_init+0x11/0x120 [<0000000059709e59>] ret_from_fork+0x22/0x30 unreferenced object 0xffff8c5944b8dd40 (size 64): comm \"swapper/0\", pid 1, jiffies 4294670387 (age 151.072s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000306efe8b>] amd_uncore_cpu_up_prepare+0x183/0x230 [<00000000ddc9e126>] cpuhp_invoke_callback+0x",
    "evidence": "osv:CVE-2022-49784",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.0.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-49784",
      "aliases": [
        "CVE-2022-49784"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "39621c5808f5dda75d03dc4b2d4d2b13a5a1c34b"
                },
                {
                  "fixed": "f75be9885d49e3717de962345c4572ddab52b178"
                },
                {
                  "fixed": "bdfe34597139cfcecd47a2eb97fea44d77157491"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49784.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.0.0"
                },
                {
                  "fixed": "6.0.10"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49784.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:28.011894376Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/bdfe34597139cfcecd47a2eb97fea44d77157491",
        "https://git.kernel.org/stable/c/f75be9885d49e3717de962345c4572ddab52b178",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49784.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49784",
        "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/2022/49xxx/CVE-2022-49784.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-49784",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 494554,
  "published_at": "2025-05-01T14:09:17.695+00:00"
}