On Thu, 06 Mar 2025 11:24:28 +0100, Christophe Leroy wrote:
> In relocate_32.S, function clear_utlb_entry() goes into real mode. To
> do so, it has to calculate the physical address based on the virtual
> address. To get the virtual address it uses 'bl' which is problematic
> (see commit c974809a26a1 ("powerpc/vdso: Avoid link stack corruption
> in __get_datapage()")). In addition, the calculation is done on a
> wrong address because 'bl' loads LR with the address of the following
> instruction, not the address of the target. So when the target is not
> the instruction following the 'bl' instruction, it may lead to
> unexpected behaviour.
>
> [...]
Applied to powerpc/next.
[1/1] powerpc/kexec: fix physical address calculation in clear_utlb_entry()
https://git.kernel.org/powerpc/c/861efb8a48ee8b73ae4e8817509cd4e82fd52bc4
Thanks
