GHSA-6JF6-455V-8C5M
Vulnerability from github – Published: 2024-06-25 15:31 – Updated: 2024-09-03 18:31In the Linux kernel, the following vulnerability has been resolved:
clk: bcm: rpi: Assign ->num before accessing ->hws
Commit f316cdff8d67 ("clk: Annotate struct clk_hw_onecell_data with __counted_by") annotated the hws member of 'struct clk_hw_onecell_data' with __counted_by, which informs the bounds sanitizer about the number of elements in hws, so that it can warn when hws is accessed out of bounds. As noted in that change, the __counted_by member must be initialized with the number of elements before the first array access happens, otherwise there will be a warning from each access prior to the initialization because the number of elements is zero. This occurs in raspberrypi_discover_clocks() due to ->num being assigned after ->hws has been accessed:
UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-raspberrypi.c:374:4 index 3 is out of range for type 'struct clk_hw [] __counted_by(num)' (aka 'struct clk_hw []')
Move the ->num initialization to before the first access of ->hws, which clears up the warning.
{
"affected": [],
"aliases": [
"CVE-2024-39461"
],
"database_specific": {
"cwe_ids": [
"CWE-129"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-06-25T15:15:14Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nclk: bcm: rpi: Assign -\u003enum before accessing -\u003ehws\n\nCommit f316cdff8d67 (\"clk: Annotate struct clk_hw_onecell_data with\n__counted_by\") annotated the hws member of \u0027struct clk_hw_onecell_data\u0027\nwith __counted_by, which informs the bounds sanitizer about the number\nof elements in hws, so that it can warn when hws is accessed out of\nbounds. As noted in that change, the __counted_by member must be\ninitialized with the number of elements before the first array access\nhappens, otherwise there will be a warning from each access prior to the\ninitialization because the number of elements is zero. This occurs in\nraspberrypi_discover_clocks() due to -\u003enum being assigned after -\u003ehws\nhas been accessed:\n\n UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-raspberrypi.c:374:4\n index 3 is out of range for type \u0027struct clk_hw *[] __counted_by(num)\u0027 (aka \u0027struct clk_hw *[]\u0027)\n\nMove the -\u003enum initialization to before the first access of -\u003ehws, which\nclears up the warning.",
"id": "GHSA-6jf6-455v-8c5m",
"modified": "2024-09-03T18:31:31Z",
"published": "2024-06-25T15:31:09Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-39461"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6dc445c1905096b2ed4db1a84570375b4e00cc0f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9562dbe5cdbb16ac887d27ef6f179980bb99193c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cdf9c7871d58d3df59d2775982e3533adb8ec920"
}
],
"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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