CyberRota Analysis
AI-GeneratedA vulnerability in the Linux kernel allows for a potential kernel crash when an invalid pointer is passed to the kthread_stop() function due to a failure in thread creation, particularly under memory pressure during boot-time self-tests. This issue can lead to system instability and should be prioritized by organizations running Linux systems, especially those relying on kernel-level tracing and self-testing functionalities. Immediate attention is recommended to ensure system reliability and prevent unexpected crashes.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: tracing: Fix crash passing ERR_PTR to kthread_stop() event_test_stuff() calls kthread_run() and unconditionally passes the returned task_struct pointer to kthread_stop(). kthread_run() returns an error pointer such as ERR_PTR(-ENOMEM) when kthread creation fails, for example under memory pressure during the boot-time event self-test. kthread_stop() then dereferences the invalid pointer, crashing the kernel. Check the result of kthread_run() before passing it to kthread_stop(). Use WARN_ON() so that a failure to create the self-test thread does not go unnoticed, matching the ring-buffer self-test fix in commit 91542863abad ("ring-buffer: Fix crash passing ERR_PTR to kthread_stop()").