ghsa-375r-hmjc-j5gg
Vulnerability from github
Published
2024-09-11 18:31
Modified
2024-09-13 18:31
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

In the Linux kernel, the following vulnerability has been resolved:

drm/msm/dpu: move dpu_encoder's connector assignment to atomic_enable()

For cases where the crtc's connectors_changed was set without enable/active getting toggled , there is an atomic_enable() call followed by an atomic_disable() but without an atomic_mode_set().

This results in a NULL ptr access for the dpu_encoder_get_drm_fmt() call in the atomic_enable() as the dpu_encoder's connector was cleared in the atomic_disable() but not re-assigned as there was no atomic_mode_set() call.

Fix the NULL ptr access by moving the assignment for atomic_enable() and also use drm_atomic_get_new_connector_for_encoder() to get the connector from the atomic_state.

Patchwork: https://patchwork.freedesktop.org/patch/606729/

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{
  "affected": [],
  "aliases": [
    "CVE-2024-45015"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-09-11T16:15:06Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm/dpu: move dpu_encoder\u0027s connector assignment to atomic_enable()\n\nFor cases where the crtc\u0027s connectors_changed was set without enable/active\ngetting toggled , there is an atomic_enable() call followed by an\natomic_disable() but without an atomic_mode_set().\n\nThis results in a NULL ptr access for the dpu_encoder_get_drm_fmt() call in\nthe atomic_enable() as the dpu_encoder\u0027s connector was cleared in the\natomic_disable() but not re-assigned as there was no atomic_mode_set() call.\n\nFix the NULL ptr access by moving the assignment for atomic_enable() and also\nuse drm_atomic_get_new_connector_for_encoder() to get the connector from\nthe atomic_state.\n\nPatchwork: https://patchwork.freedesktop.org/patch/606729/",
  "id": "GHSA-375r-hmjc-j5gg",
  "modified": "2024-09-13T18:31:41Z",
  "published": "2024-09-11T18:31:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-45015"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3bacf814b6a61cc683c68465f175ebd938f09c52"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3fb61718bcbe309279205d1cc275a6435611dc77"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aedf02e46eb549dac8db4821a6b9f0c6bf6e3990"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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