ghsa-xvjp-2h38-99ph
Vulnerability from github
Published
2024-09-04 21:30
Modified
2024-09-06 18:31
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Details

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

drm/v3d: Fix out-of-bounds read in v3d_csd_job_run()

When enabling UBSAN on Raspberry Pi 5, we get the following warning:

[ 387.894977] UBSAN: array-index-out-of-bounds in drivers/gpu/drm/v3d/v3d_sched.c:320:3 [ 387.903868] index 7 is out of range for type '__u32 [7]' [ 387.909692] CPU: 0 PID: 1207 Comm: kworker/u16:2 Tainted: G WC 6.10.3-v8-16k-numa #151 [ 387.919166] Hardware name: Raspberry Pi 5 Model B Rev 1.0 (DT) [ 387.925961] Workqueue: v3d_csd drm_sched_run_job_work [gpu_sched] [ 387.932525] Call trace: [ 387.935296] dump_backtrace+0x170/0x1b8 [ 387.939403] show_stack+0x20/0x38 [ 387.942907] dump_stack_lvl+0x90/0xd0 [ 387.946785] dump_stack+0x18/0x28 [ 387.950301] __ubsan_handle_out_of_bounds+0x98/0xd0 [ 387.955383] v3d_csd_job_run+0x3a8/0x438 [v3d] [ 387.960707] drm_sched_run_job_work+0x520/0x6d0 [gpu_sched] [ 387.966862] process_one_work+0x62c/0xb48 [ 387.971296] worker_thread+0x468/0x5b0 [ 387.975317] kthread+0x1c4/0x1e0 [ 387.978818] ret_from_fork+0x10/0x20 [ 387.983014] ---[ end trace ]---

This happens because the UAPI provides only seven configuration registers and we are reading the eighth position of this u32 array.

Therefore, fix the out-of-bounds read in v3d_csd_job_run() by accessing only seven positions on the '__u32 [7]' array. The eighth register exists indeed on V3D 7.1, but it isn't currently used. That being so, let's guarantee that it remains unused and add a note that it could be set in a future patch.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-44993"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-09-04T20:15:08Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/v3d: Fix out-of-bounds read in `v3d_csd_job_run()`\n\nWhen enabling UBSAN on Raspberry Pi 5, we get the following warning:\n\n[  387.894977] UBSAN: array-index-out-of-bounds in drivers/gpu/drm/v3d/v3d_sched.c:320:3\n[  387.903868] index 7 is out of range for type \u0027__u32 [7]\u0027\n[  387.909692] CPU: 0 PID: 1207 Comm: kworker/u16:2 Tainted: G        WC         6.10.3-v8-16k-numa #151\n[  387.919166] Hardware name: Raspberry Pi 5 Model B Rev 1.0 (DT)\n[  387.925961] Workqueue: v3d_csd drm_sched_run_job_work [gpu_sched]\n[  387.932525] Call trace:\n[  387.935296]  dump_backtrace+0x170/0x1b8\n[  387.939403]  show_stack+0x20/0x38\n[  387.942907]  dump_stack_lvl+0x90/0xd0\n[  387.946785]  dump_stack+0x18/0x28\n[  387.950301]  __ubsan_handle_out_of_bounds+0x98/0xd0\n[  387.955383]  v3d_csd_job_run+0x3a8/0x438 [v3d]\n[  387.960707]  drm_sched_run_job_work+0x520/0x6d0 [gpu_sched]\n[  387.966862]  process_one_work+0x62c/0xb48\n[  387.971296]  worker_thread+0x468/0x5b0\n[  387.975317]  kthread+0x1c4/0x1e0\n[  387.978818]  ret_from_fork+0x10/0x20\n[  387.983014] ---[ end trace ]---\n\nThis happens because the UAPI provides only seven configuration\nregisters and we are reading the eighth position of this u32 array.\n\nTherefore, fix the out-of-bounds read in `v3d_csd_job_run()` by\naccessing only seven positions on the \u0027__u32 [7]\u0027 array. The eighth\nregister exists indeed on V3D 7.1, but it isn\u0027t currently used. That\nbeing so, let\u0027s guarantee that it remains unused and add a note that it\ncould be set in a future patch.",
  "id": "GHSA-xvjp-2h38-99ph",
  "modified": "2024-09-06T18:31:29Z",
  "published": "2024-09-04T21:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-44993"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/497d370a644d95a9f04271aa92cb96d32e84c770"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d656b82c4b30cf12715e6cd129d3df808fde24a7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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