On Mon, Mar 29, 2021 at 10:28:47AM -0400, Pavel Tatashin wrote:
commit ee7febce051945be28ad86d16a15886f878204de upstream.Memory hotplug may fail on systems with CONFIG_RANDOMIZE_BASE because the linear map range is not checked correctly. The start physical address that linear map covers can be actually at the end of the range because of randomization. Check that and if so reduce it to 0. This can be verified on QEMU with setting kaslr-seed to ~0ul: memstart_offset_seed = 0xffff START: __pa(_PAGE_OFFSET(vabits_actual)) = ffff9000c0000000 END: __pa(PAGE_END - 1) = 1000bfffffff Fixes: 58284a901b42 ("arm64/mm: Validate hotplug range before creating linear mapping") Signed-off-by: Pavel Tatashin <[email protected]> Tested-by: Tyler Hicks <[email protected]> Reviewed-by: Anshuman Khandual <[email protected]>
Queued up, thanks! -- Thanks, Sasha
