ghsa-x99c-gp84-c52f
Vulnerability from github
Published
2025-01-08 18:30
Modified
2025-01-09 21:31
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:

powerpc/prom_init: Fixup missing powermac #size-cells

On some powermacs escc nodes are missing #size-cells properties, which is deprecated and now triggers a warning at boot since commit 045b14ca5c36 ("of: WARN on deprecated #address-cells/#size-cells handling").

For example:

Missing '#size-cells' in /pci@f2000000/mac-io@c/escc@13000 WARNING: CPU: 0 PID: 0 at drivers/of/base.c:133 of_bus_n_size_cells+0x98/0x108 Hardware name: PowerMac3,1 7400 0xc0209 PowerMac ... Call Trace: of_bus_n_size_cells+0x98/0x108 (unreliable) of_bus_default_count_cells+0x40/0x60 __of_get_address+0xc8/0x21c __of_address_to_resource+0x5c/0x228 pmz_init_port+0x5c/0x2ec pmz_probe.isra.0+0x144/0x1e4 pmz_console_init+0x10/0x48 console_init+0xcc/0x138 start_kernel+0x5c4/0x694

As powermacs boot via prom_init it's possible to add the missing properties to the device tree during boot, avoiding the warning. Note that escc-legacy nodes are also missing #size-cells properties, but they are skipped by the macio driver, so leave them alone.

Depends-on: 045b14ca5c36 ("of: WARN on deprecated #address-cells/#size-cells handling")

Show details on source website

To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2024-56781"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-08T18:15:19Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/prom_init: Fixup missing powermac #size-cells\n\nOn some powermacs `escc` nodes are missing `#size-cells` properties,\nwhich is deprecated and now triggers a warning at boot since commit\n045b14ca5c36 (\"of: WARN on deprecated #address-cells/#size-cells\nhandling\").\n\nFor example:\n\n  Missing \u0027#size-cells\u0027 in /pci@f2000000/mac-io@c/escc@13000\n  WARNING: CPU: 0 PID: 0 at drivers/of/base.c:133 of_bus_n_size_cells+0x98/0x108\n  Hardware name: PowerMac3,1 7400 0xc0209 PowerMac\n  ...\n  Call Trace:\n    of_bus_n_size_cells+0x98/0x108 (unreliable)\n    of_bus_default_count_cells+0x40/0x60\n    __of_get_address+0xc8/0x21c\n    __of_address_to_resource+0x5c/0x228\n    pmz_init_port+0x5c/0x2ec\n    pmz_probe.isra.0+0x144/0x1e4\n    pmz_console_init+0x10/0x48\n    console_init+0xcc/0x138\n    start_kernel+0x5c4/0x694\n\nAs powermacs boot via prom_init it\u0027s possible to add the missing\nproperties to the device tree during boot, avoiding the warning. Note\nthat `escc-legacy` nodes are also missing `#size-cells` properties, but\nthey are skipped by the macio driver, so leave them alone.\n\nDepends-on: 045b14ca5c36 (\"of: WARN on deprecated #address-cells/#size-cells handling\")",
  "id": "GHSA-x99c-gp84-c52f",
  "modified": "2025-01-09T21:31:29Z",
  "published": "2025-01-08T18:30:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-56781"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0b94d838018fb0a824e0cd3149034928c99fb1b7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/296a109fa77110ba5267fe0e90a26005eecc2726"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/691284c2cd33ffaa0b35ce53b3286b90621e9dc9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6d5f0453a2228607333bff0c85238a3cb495d194"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a79a7e3c03ae2a07f68b5f24d5ed549f9799ec89"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf89c9434af122f28a3552e6f9cc5158c33ce50a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ee68554d2c03e32077f7b984e5289fdb005036d2"
    }
  ],
  "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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