CVE-2024-57934
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-57934
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-57934.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2024-57934
- Downstream
- Related
- Published
- 2025-01-21T12:15:27Z
- Modified
- 2025-10-01T20:18:05Z
- Severity
-
- 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
fgraph: Add READONCE() when accessing fgrapharray[]
In _ftracereturntohandler(), a loop iterates over the fgrapharray[] elements, which are fgraphops. The loop checks if an element is a fgraphstub to prevent using a fgraphstub afterward.
However, if the compiler reloads fgrapharray[] after this check, it might race with an update to fgrapharray[] that introduces a fgraphstub. This could result in the stub being processed, but the stub contains a null "funchash" field, leading to a NULL pointer dereference.
To ensure that the gops compared against the fgraphstub matches the gops processed later, add a READONCE(). A similar patch appears in commit 63a8dfb ("functiongraph: Add READONCE() when accessing fgraph_array[]").
- References