CVE-2021-47632 powerpc/set_memory: Avoid spinlock recursion in change_page_attr()

In the Linux kernel, the following vulnerability has been resolved: powerpc/setmemory: Avoid spinlock recursion in changepageattr Commit 1f9ad21c3b38 "powerpc/mm: Implement setmemory routines" included a spinlock to changepageattr in order to safely perform the three step operations. But then...

GSD-2022-1001401 powerpc/set_memory: Avoid spinlock recursion in change_page_attr()

powerpc/setmemory: Avoid spinlock recursion in changepageattr This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.16.20 by commit...