drm/mediatek: Set private->all_drm_private[i]->drm to NULL if mtk_drm_bind returns err

{
  "id": "ff2fd6871b2af7b33af91949308092244f4276e41f42448c2682e0d7969048ca",
  "url": "https://osv.dev/vulnerability/CVE-2024-57926",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "drm/mediatek: Set private->all_drm_private[i]->drm to NULL if mtk_drm_bind returns err",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: Set private->all_drm_private[i]->drm to NULL if mtk_drm_bind returns err The pointer need to be set to NULL, otherwise KASAN complains about use-after-free. Because in mtk_drm_bind, all private's drm are set as follows. private->all_drm_private[i]->drm = drm; And drm will be released by drm_dev_put in case mtk_drm_kms_init returns failure. However, the shutdown path still accesses the previous allocated memory in drm_atomic_helper_shutdown. [ 84.874820] watchdog: watchdog0: watchdog did not stop! [ 86.512054] ================================================================== [ 86.513162] BUG: KASAN: use-after-free in drm_atomic_helper_shutdown+0x33c/0x378 [ 86.514258] Read of size 8 at addr ffff0000d46fc068 by task shutdown/1 [ 86.515213] [ 86.515455] CPU: 1 UID: 0 PID: 1 Comm: shutdown Not tainted 6.13.0-rc1-mtk+gfa1a78e5d24b-dirty #55 [ 86.516752] Hardware name: Unknown Product/Unknown Product, BIOS 2022.10 10/01/2022 [ 86.517960] Call trace: [ 86.518333] show_stack+0x20/0x38 (C) [ 86.518891] dump_stack_lvl+0x90/0xd0 [ 86.519443] print_report+0xf8/0x5b0 [ 86.519985] kasan_report+0xb4/0x100 [ 86.520526] __asan_report_load8_noabort+0x20/0x30 [ 86.521240] drm_atomic_helper_shutdown+0x33c/0x378 [ 86.521966] mtk_drm_shutdown+0x54/0x80 [ 86.522546] platform_shutdown+0x64/0x90 [ 86.523137] device_shutdown+0x260/0x5b8 [ 86.523728] kernel_restart+0x78/0xf0 [ 86.524282] __do_sys_reboot+0x258/0x2f0 [ 86.",
    "evidence": "osv:CVE-2024-57926",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.72",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2024-57926",
      "aliases": [
        "CVE-2024-57926"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/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": "1ef7ed48356cd5f9af2b7671956991b658d8c2ba"
                },
                {
                  "fixed": "7083b93e9755d60f0c2bcaa9d064308108280534"
                },
                {
                  "fixed": "078b2ff7da200b7532398e668eef723ad40fb516"
                },
                {
                  "fixed": "36684e9d88a2e2401ae26715a2e217cb4295cea7"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-57926.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.4.0"
                },
                {
                  "fixed": "6.6.72"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.10"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-57926.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.082644037Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/078b2ff7da200b7532398e668eef723ad40fb516",
        "https://git.kernel.org/stable/c/36684e9d88a2e2401ae26715a2e217cb4295cea7",
        "https://git.kernel.org/stable/c/7083b93e9755d60f0c2bcaa9d064308108280534",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/57xxx/CVE-2024-57926.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-57926",
        "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/2024/57xxx/CVE-2024-57926.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-57926",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496933,
  "published_at": "2025-01-19T11:52:43.915+00:00"
}