CVE-2024-46692 firmware: qcom: scm: Mark get_wq_ctx() as atomic call

2024-09-1305:29:21

Linux

www.cve.org

linux kernel

qcom

scm

firmware

smc calls

deadlock

fast call

EPSS

Percentile

5.1%

JSON

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

firmware: qcom: scm: Mark get_wq_ctx() as atomic call

Currently get_wq_ctx() is wrongly configured as a standard call. When two
SMC calls are in sleep and one SMC wakes up, it calls get_wq_ctx() to
resume the corresponding sleeping thread. But if get_wq_ctx() is
interrupted, goes to sleep and another SMC call is waiting to be allocated
a waitq context, it leads to a deadlock.

To avoid this get_wq_ctx() must be an atomic call and can’t be a standard
SMC call. Hence mark get_wq_ctx() as a fast call.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/firmware/qcom/qcom_scm-smc.c"
    ],
    "versions": [
      {
        "version": "6bf325992236",
        "lessThan": "cdf7efe4b02a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "6bf325992236",
        "lessThan": "e40115c33c0d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "6bf325992236",
        "lessThan": "9960085a3a82",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/firmware/qcom/qcom_scm-smc.c"
    ],
    "versions": [
      {
        "version": "6.3",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.3",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.49",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10.8",
        "lessThanOrEqual": "6.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.11",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]