In the Linux kernel, the following vulnerability has been resolved:
sched/ext: Prevent update_locked_rq() calls with NULL rq
Avoid invoking update_locked_rq() when the runqueue (rq) pointer is NULL
in the SCX_CALL_OP and SCX_CALL_OP_RET macros.
Previously, calling update_locked_rq(NULL) with preemption enabled could
trigger the following warning:
BUG: using __this_cpu_write() in preemptible [00000000]
This happens because __this_cpu_write() is unsafe to use in preemptible
context.
rq is NULL when an ops invoked from an unlocked context. In such cases, we
don't need to store any rq, since the value should already be NULL
(unlocked). Ensure that update_locked_rq() is only called when rq is
non-NULL, preventing calling __this_cpu_write() on preemptible context.
CVSS
No CVSS.
References
Configurations
No configuration.
History
16 Aug 2025, 12:15
Type | Values Removed | Values Added |
---|---|---|
New CVE |
Information
Published : 2025-08-16 12:15
Updated : 2025-08-16 12:15
NVD link : CVE-2025-38522
Mitre link : CVE-2025-38522
CVE.ORG link : CVE-2025-38522
JSON object : View
Products Affected
No product.
CWE
No CWE.