mm/damon/vaddr-test: fix memory leak in damon_do_test_apply_three_regions()

{
  "id": "8f36663a697eb594a0a78173d2e0a3ccd6fb6aa23970080ce239fcf70695b937",
  "url": "https://osv.dev/vulnerability/CVE-2023-52560",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "mm/damon/vaddr-test: fix memory leak in damon_do_test_apply_three_regions()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: mm/damon/vaddr-test: fix memory leak in damon_do_test_apply_three_regions() When CONFIG_DAMON_VADDR_KUNIT_TEST=y and making CONFIG_DEBUG_KMEMLEAK=y and CONFIG_DEBUG_KMEMLEAK_AUTO_SCAN=y, the below memory leak is detected. Since commit 9f86d624292c (\"mm/damon/vaddr-test: remove unnecessary variables\"), the damon_destroy_ctx() is removed, but still call damon_new_target() and damon_new_region(), the damon_region which is allocated by kmem_cache_alloc() in damon_new_region() and the damon_target which is allocated by kmalloc in damon_new_target() are not freed. And the damon_region which is allocated in damon_new_region() in damon_set_regions() is also not freed. So use damon_destroy_target to free all the damon_regions and damon_target. unreferenced object 0xffff888107c9a940 (size 64): comm \"kunit_try_catch\", pid 1069, jiffies 4294670592 (age 732.761s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 06 00 00 00 6b 6b 6b 6b ............kkkk 60 c7 9c 07 81 88 ff ff f8 cb 9c 07 81 88 ff ff `............... backtrace: [] kmalloc_trace+0x27/0xa0 [] damon_new_target+0x3f/0x1b0 [] damon_do_test_apply_three_regions.constprop.0+0x95/0x3e0 [] damon_test_apply_three_regions1+0x21e/0x260 [] kunit_generic_run_threadfn_adapter+0x4a/0x90 [] kthread+0x2b6/0x380 [] ret_from_fork+0x2d/0x70 [] ret_from_fork_asm+0x11/0x20 unreferenced object 0xffff8881079cc740 (size 56): comm \"kunit_try_catch\", pid 1069, jiffies 4294670592 (age",
    "evidence": "osv:CVE-2023-52560",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.56",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.5.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2023-52560",
      "aliases": [
        "CVE-2023-52560"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9f86d624292c238203b3687cdb870a2cde1a6f9b"
                },
                {
                  "fixed": "9a4fe81a8644b717d57d81ce5849e16583b13fe8"
                },
                {
                  "fixed": "6b522001693aa113d97a985abc5f6932972e8e86"
                },
                {
                  "fixed": "45120b15743fa7c0aa53d5db6dfb4c8f87be4abd"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52560.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.56"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.5.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52560.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:39.715636443Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/45120b15743fa7c0aa53d5db6dfb4c8f87be4abd",
        "https://git.kernel.org/stable/c/6b522001693aa113d97a985abc5f6932972e8e86",
        "https://git.kernel.org/stable/c/9a4fe81a8644b717d57d81ce5849e16583b13fe8",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52560.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-52560",
        "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-2023-52560.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-52560",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 506924,
  "published_at": "2024-03-02T21:59:34.084+00:00"
}