CVE-2025-38233 powerpc64/ftrace: fix clobbered r15 during livepatching

In the Linux kernel, the following vulnerability has been resolved: powerpc64/ftrace: fix clobbered r15 during livepatching While r15 is clobbered always with PPCFTRACEOUTOFLINE, it is not restored in livepatch sequence leading to not so obvious fails like below: BUG: Unable to handle kernel data...

PT-2025-28008 · Linux · Linux Kernel

Name of the Vulnerable Software and Affected Versions: Linux kernel versions 6.14.0 and later Description: The issue is related to the powerpc64/ftrace component of the Linux kernel, where the register r15 is clobbered during livepatching and not restored, leading to potential kernel crashes. Thi...