GHSA-5CP3-HG96-HVR9
Vulnerability from github – Published: 2024-10-21 21:30 – Updated: 2024-10-24 21:31In the Linux kernel, the following vulnerability has been resolved:
net: mdiobus: fix unbalanced node reference count
I got the following report while doing device(mscc-miim) load test with CONFIG_OF_UNITTEST and CONFIG_OF_DYNAMIC enabled:
OF: ERROR: memory leak, expected refcount 1 instead of 2, of_node_get()/of_node_put() unbalanced - destroy cset entry: attach overlay node /spi/soc@0/mdio@7107009c/ethernet-phy@0
If the 'fwnode' is not an acpi node, the refcount is get in fwnode_mdiobus_phy_device_register(), but it has never been put when the device is freed in the normal path. So call fwnode_handle_put() in phy_device_release() to avoid leak.
If it's an acpi node, it has never been get, but it's put in the error path, so call fwnode_handle_get() before phy_device_register() to keep get/put operation balanced.
{
"affected": [],
"aliases": [
"CVE-2022-49016"
],
"database_specific": {
"cwe_ids": [
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-10-21T20:15:12Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mdiobus: fix unbalanced node reference count\n\nI got the following report while doing device(mscc-miim) load test\nwith CONFIG_OF_UNITTEST and CONFIG_OF_DYNAMIC enabled:\n\n OF: ERROR: memory leak, expected refcount 1 instead of 2,\n of_node_get()/of_node_put() unbalanced - destroy cset entry:\n attach overlay node /spi/soc@0/mdio@7107009c/ethernet-phy@0\n\nIf the \u0027fwnode\u0027 is not an acpi node, the refcount is get in\nfwnode_mdiobus_phy_device_register(), but it has never been\nput when the device is freed in the normal path. So call\nfwnode_handle_put() in phy_device_release() to avoid leak.\n\nIf it\u0027s an acpi node, it has never been get, but it\u0027s put\nin the error path, so call fwnode_handle_get() before\nphy_device_register() to keep get/put operation balanced.",
"id": "GHSA-5cp3-hg96-hvr9",
"modified": "2024-10-24T21:31:02Z",
"published": "2024-10-21T21:30:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49016"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2708b357440427d6a9fee667eb7b8307f4625adc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/543d917f691ab06885ee779c862065899eaa4251"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cdde1560118f82498fc9e9a7c1ef7f0ef7755891"
}
],
"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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