ghsa-w6pp-7vhg-w878
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
thermal: Fix NULL pointer dereferences in of_thermal_ functions
of_parse_thermal_zones() parses the thermal-zones node and registers a thermal_zone device for each subnode. However, if a thermal zone is consuming a thermal sensor and that thermal sensor device hasn't probed yet, an attempt to set trip_point_*_temp for that thermal zone device can cause a NULL pointer dereference. Fix it.
console:/sys/class/thermal/thermal_zone87 # echo 120000 > trip_point_0_temp ... Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020 ... Call trace: of_thermal_set_trip_temp+0x40/0xc4 trip_point_temp_store+0xc0/0x1dc dev_attr_store+0x38/0x88 sysfs_kf_write+0x64/0xc0 kernfs_fop_write_iter+0x108/0x1d0 vfs_write+0x2f4/0x368 ksys_write+0x7c/0xec __arm64_sys_write+0x20/0x30 el0_svc_common.llvm.7279915941325364641+0xbc/0x1bc do_el0_svc+0x28/0xa0 el0_svc+0x14/0x24 el0_sync_handler+0x88/0xec el0_sync+0x1c0/0x200
While at it, fix the possible NULL pointer dereference in other functions as well: of_thermal_get_temp(), of_thermal_set_emul_temp(), of_thermal_get_trend().
{
"affected": [],
"aliases": [
"CVE-2021-47202"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-04-10T19:15:48Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nthermal: Fix NULL pointer dereferences in of_thermal_ functions\n\nof_parse_thermal_zones() parses the thermal-zones node and registers a\nthermal_zone device for each subnode. However, if a thermal zone is\nconsuming a thermal sensor and that thermal sensor device hasn\u0027t probed\nyet, an attempt to set trip_point_*_temp for that thermal zone device\ncan cause a NULL pointer dereference. Fix it.\n\n console:/sys/class/thermal/thermal_zone87 # echo 120000 \u003e trip_point_0_temp\n ...\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020\n ...\n Call trace:\n of_thermal_set_trip_temp+0x40/0xc4\n trip_point_temp_store+0xc0/0x1dc\n dev_attr_store+0x38/0x88\n sysfs_kf_write+0x64/0xc0\n kernfs_fop_write_iter+0x108/0x1d0\n vfs_write+0x2f4/0x368\n ksys_write+0x7c/0xec\n __arm64_sys_write+0x20/0x30\n el0_svc_common.llvm.7279915941325364641+0xbc/0x1bc\n do_el0_svc+0x28/0xa0\n el0_svc+0x14/0x24\n el0_sync_handler+0x88/0xec\n el0_sync+0x1c0/0x200\n\nWhile at it, fix the possible NULL pointer dereference in other\nfunctions as well: of_thermal_get_temp(), of_thermal_set_emul_temp(),\nof_thermal_get_trend().",
"id": "GHSA-w6pp-7vhg-w878",
"modified": "2024-04-10T21:30:31Z",
"published": "2024-04-10T21:30:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47202"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0750f769b95841b34a9fe8c418dd792ff526bf86"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6a315471cb6a07f651e1d3adc8962730f4fcccac"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/828f4c31684da94ecf0b44a2cbd35bbede04f0bd"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/96cfe05051fd8543cdedd6807ec59a0e6c409195"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ef2590a5305e0b8e9342f84c2214aa478ee7f28e"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
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