CVE-2024-42230

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> powerpc/pseries: Fix scv instruction crash with kexec<br /> <br /> kexec on pseries disables AIL (reloc_on_exc), required for scv<br /> instruction support, before other CPUs have been shut down. This means<br /> they can execute scv instructions after AIL is disabled, which causes an<br /> interrupt at an unexpected entry location that crashes the kernel.<br /> <br /> Change the kexec sequence to disable AIL after other CPUs have been<br /> brought down.<br /> <br /> As a refresher, the real-mode scv interrupt vector is 0x17000, and the<br /> fixed-location head code probably couldn&amp;#39;t easily deal with implementing<br /> such high addresses so it was just decided not to support that interrupt<br /> at all.