Riskcovery

CVE-2024-38629

dmaengine: idxd: Avoid unnecessary destruction of file_ida

State
Published
Severity
Not scored
Published
Jun 21, 2024
Updated
May 11, 2026
Reserved
Jun 18, 2024

Read the record on cve.org

Description

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

dmaengine: idxd: Avoid unnecessary destruction of file_ida

file_ida is allocated during cdev open and is freed accordingly during cdev release. This sequence is guaranteed by driver file operations. Therefore, there is no need to destroy an already empty file_ida when the WQ cdev is removed.

Worse, ida_free() in cdev release may happen after destruction of file_ida per WQ cdev. This can lead to accessing an id in file_ida after it has been destroyed, resulting in a kernel panic.

Remove ida_destroy(&file_ida) to address these issues.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • e6fd6d7e5f0fe4a17a08e892afb5db800e7794ec to before 9eb15f24a0b9b017b39cde8b8c07243676b63687Affected
  • e6fd6d7e5f0fe4a17a08e892afb5db800e7794ec to before 15edb906211bf53e7b5574f7326ab734d6bff4f9Affected
  • e6fd6d7e5f0fe4a17a08e892afb5db800e7794ec to before 76e43fa6a456787bad31b8d0daeabda27351a480Affected
LinuxLinux
  • 6.4Affected
  • before 6.4Not affected
  • 6.6.33 through 6.6.*Not affected
  • 6.9.4 through 6.9.*Not affected
  • 6.10 and laterNot affected

References

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