Re: [PATCH] memblock: Check memory add/cap ordering

From: Mike Rapoport
Date: Wed Aug 11 2021 - 09:06:43 EST


On Wed, Aug 11, 2021 at 10:55:18AM +0200, Geert Uytterhoeven wrote:
> For memblock_cap_memory_range() to work properly, it should be called
> after memory is detected and added to memblock with memblock_add() or
> memblock_add_node(). If memblock_cap_memory_range() would be called
> before memory is registered, we may silently corrupt memory later
> because the crash kernel will see all memory as available.
>
> Print a warning and bail out if ordering is not satisfied.
>
> Suggested-by: Mike Rapoport <rppt@xxxxxxxxxx>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>

Applied for 5.15,
Thanks!

--
Sincerely yours,
Mike.