ghsa-pgjc-h8g4-v6j2
Vulnerability from github
Published
2024-10-21 18:30
Modified
2024-10-24 18:30
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/amd/display: Add null check for head_pipe in dcn32_acquire_idle_pipe_for_head_pipe_in_layer

This commit addresses a potential null pointer dereference issue in the dcn32_acquire_idle_pipe_for_head_pipe_in_layer function. The issue could occur when head_pipe is null.

The fix adds a check to ensure head_pipe is not null before asserting it. If head_pipe is null, the function returns NULL to prevent a potential null pointer dereference.

Reported by smatch: drivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn32/dcn32_resource.c:2690 dcn32_acquire_idle_pipe_for_head_pipe_in_layer() error: we previously assumed 'head_pipe' could be null (see line 2681)

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{
  "affected": [],
  "aliases": [
    "CVE-2024-49918"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-21T18:15:14Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Add null check for head_pipe in dcn32_acquire_idle_pipe_for_head_pipe_in_layer\n\nThis commit addresses a potential null pointer dereference issue in the\n`dcn32_acquire_idle_pipe_for_head_pipe_in_layer` function. The issue\ncould occur when `head_pipe` is null.\n\nThe fix adds a check to ensure `head_pipe` is not null before asserting\nit. If `head_pipe` is null, the function returns NULL to prevent a\npotential null pointer dereference.\n\nReported by smatch:\ndrivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn32/dcn32_resource.c:2690 dcn32_acquire_idle_pipe_for_head_pipe_in_layer() error: we previously assumed \u0027head_pipe\u0027 could be null (see line 2681)",
  "id": "GHSA-pgjc-h8g4-v6j2",
  "modified": "2024-10-24T18:30:42Z",
  "published": "2024-10-21T18:30:57Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-49918"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f47292f488fa7041284dca1f1244116c18721f1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96d4c2ee18d732a248d053aae8c4a27cb1d68d1c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ac2140449184a26eac99585b7f69814bd3ba8f2d"
    }
  ],
  "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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