CVE-2026-43416 powerpc, perf: Check that current->mm is alive before getting user callchain

In the Linux kernel, the following vulnerability has been resolved: powerpc, perf: Check that current-mm is alive before getting user callchain It may happen that mm is already released, which leads to kernel panic. This adds the NULL check for current-mm, similarly to commit 20afc60f892d "x86,...

CVE-2026-43416

In the Linux kernel, the following vulnerability has been resolved: powerpc, perf: Check that current-mm is alive before getting user callchain It may happen that mm is already released, which leads to kernel panic. This adds the NULL check for current-mm, similarly to commit 20afc60f892d "x86,...