drm/msm: don't tear down KMS twice when KMS init fails

{
  "id": "e9101af021efb78379cc4796cc74ac11295182f2754af2a6326f703ff6ae2022",
  "url": "https://osv.dev/vulnerability/CVE-2026-90363",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "drm/msm: don't tear down KMS twice when KMS init fails",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: drm/msm: don't tear down KMS twice when KMS init fails When priv->kms_init() (mdp4_kms_init() / mdp5_kms_init()) fails partway through, both display drivers already tear their KMS state down via mdp4_destroy() / mdp5_kms_destroy() before returning the error. The common error path in msm_drm_init() then runs msm_drm_uninit() -> msm_drm_kms_uninit(), which tries to destroy the very same KMS a second time, which causes a use-after-free crash. Bring MDP4/MDP5 in line with the DPU driver whose dpu_kms_init() doesn't perform error cleanup on the failure. Let the common path own the cleanup, instead of freeing the KMS from their error paths. The crash trace for the reference: __lock_acquire from lock_acquire (kernel/locking/lockdep.c:5906 kernel/locking/lockdep.c:5863) lock_acquire from touch_wq_lockdep_map (kernel/workqueue.c:4094 (discriminator 1)) touch_wq_lockdep_map from __flush_workqueue (kernel/workqueue.c:4136) __flush_workqueue from msm_drm_kms_uninit (drivers/gpu/drm/msm/msm_kms.c:243 (discriminator 33)) msm_drm_kms_uninit from msm_drm_uninit (drivers/gpu/drm/msm/msm_drv.c:93) msm_drm_uninit from msm_drm_init (drivers/gpu/drm/msm/msm_drv.c:184) msm_drm_init from try_to_bring_up_aggregate_device (drivers/base/component.c:249 drivers/base/component.c:227) try_to_bring_up_aggregate_device from __component_add (drivers/base/component.c:269 drivers/base/component.c:748) __component_add from dsi_host_attach (dri",
    "evidence": "osv:CVE-2026-90363",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.114",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.52",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-90363",
      "aliases": [
        "CVE-2026-90363"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                {
                  "fixed": "08827aa40f0ee9d37dcff8d6acb340b970051486"
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                {
                  "fixed": "e2a99fa93b400dfbb9598103249f71969501094a"
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                {
                  "fixed": "93c125e4ea98fb25f927ba5a334d85845127d667"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90363.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
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                {
                  "fixed": "6.12.114"
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            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
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                {
                  "fixed": "6.18.52"
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            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.19.0"
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                {
                  "fixed": "7.2.6"
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90363.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.200437393Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/08827aa40f0ee9d37dcff8d6acb340b970051486",
        "https://git.kernel.org/stable/c/54437ace956dc7b758c0219d6f76654b3ead8d69",
        "https://git.kernel.org/stable/c/93c125e4ea98fb25f927ba5a334d85845127d667",
        "https://git.kernel.org/stable/c/e2a99fa93b400dfbb9598103249f71969501094a",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90363.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-90363",
        "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/2026/90xxx/CVE-2026-90363.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-90363",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 518939,
  "published_at": "2026-09-17T16:09:06.817+00:00"
}