vdpa_sim: fix possible memory leak in vdpasim_net_init() and vdpasim_blk_init()

{
  "id": "33841c9ba4ea2da6077eb6474241189064b41d440663017c4a9d507cea34ed4f",
  "url": "https://osv.dev/vulnerability/CVE-2022-50702",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "vdpa_sim: fix possible memory leak in vdpasim_net_init() and vdpasim_blk_init()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: vdpa_sim: fix possible memory leak in vdpasim_net_init() and vdpasim_blk_init() Inject fault while probing module, if device_register() fails in vdpasim_net_init() or vdpasim_blk_init(), but the refcount of kobject is not decreased to 0, the name allocated in dev_set_name() is leaked. Fix this by calling put_device(), so that name can be freed in callback function kobject_cleanup(). (vdpa_sim_net) unreferenced object 0xffff88807eebc370 (size 16): comm \"modprobe\", pid 3848, jiffies 4362982860 (age 18.153s) hex dump (first 16 bytes): 76 64 70 61 73 69 6d 5f 6e 65 74 00 6b 6b 6b a5 vdpasim_net.kkk. backtrace: [] __kmalloc_node_track_caller+0x4e/0x150 [] kstrdup+0x33/0x60 [] kobject_set_name_vargs+0x41/0x110 [] dev_set_name+0xab/0xe0 [] device_add+0xe3/0x1a80 [] 0xffffffffa0270013 [] do_one_initcall+0x87/0x2e0 [] do_init_module+0x1ab/0x640 [] load_module+0x5d00/0x77f0 [] __do_sys_finit_module+0x110/0x1b0 [] do_syscall_64+0x35/0x80 [] entry_SYSCALL_64_after_hwframe+0x46/0xb0 (vdpa_sim_blk) unreferenced object 0xffff8881070c1250 (size 16): comm \"modprobe\", pid 6844, jiffies 4364069319 (age 17.572s) hex dump (first 16 bytes): 76 64 70 61 73 69 6d 5f 62 6c 6b 00 6b 6b 6b a5 vdpasim_blk.kkk. backtrace: [] __kmalloc_node_track_caller+0x4e/0x150 [] kstrdup+0x33/0x60 [] kobject_set_name_vargs+0x41/0x110 [] dev_set_name+0xab/0xe0 [] device_add+0xe3/0x1a80 [] 0xffffffffa0220013 [] do_one_initcall+0x87/0x2e0 [] do_init_modu",
    "evidence": "osv:CVE-2022-50702",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.87",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.0.19",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-50702",
      "aliases": [
        "CVE-2022-50702"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a3c06ae158dd6fa8336157c31d9234689d068d02"
                },
                {
                  "fixed": "586e6fd7d581f987f7d0d2592edf0b26397e783e"
                },
                {
                  "fixed": "5be953e353fe421f2983e1fd37f07fba97edbffc"
                },
                {
                  "fixed": "337c24d817e28dd454ca22f1063dfad20822426e"
                },
                {
                  "fixed": "aeca7ff254843d49a8739f07f7dab1341450111d"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50702.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.12.0"
                },
                {
                  "fixed": "5.15.87"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.0.19"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.1.0"
                },
                {
                  "fixed": "6.1.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50702.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:41.990757733Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/337c24d817e28dd454ca22f1063dfad20822426e",
        "https://git.kernel.org/stable/c/586e6fd7d581f987f7d0d2592edf0b26397e783e",
        "https://git.kernel.org/stable/c/5be953e353fe421f2983e1fd37f07fba97edbffc",
        "https://git.kernel.org/stable/c/aeca7ff254843d49a8739f07f7dab1341450111d",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50702.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50702",
        "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-2022-50702.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-50702",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 509701,
  "published_at": "2025-12-24T10:55:17.831+00:00"
}