Yueyi Li da6c4933cd arm64: kaslr: Reserve size of ARM64_MEMSTART_ALIGN in linear region
[ Upstream commit c8a43c18a97845e7f94ed7d181c11f41964976a2 ]

When KASLR is enabled (CONFIG_RANDOMIZE_BASE=y), the top 4K of kernel
virtual address space may be mapped to physical addresses despite being
reserved for ERR_PTR values.

Fix the randomization of the linear region so that we avoid mapping the
last page of the virtual address space.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: liyueyi <liyueyi@live.com>
[will: rewrote commit message; merged in suggestion from Ard]
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Sasha Levin (Microsoft) <sashal@kernel.org>
2019-04-17 08:36:44 +02:00
..
2019-02-20 10:18:32 +01:00
2019-03-23 13:19:47 +01:00
2016-10-19 08:39:47 -07:00
2018-11-13 11:16:47 -08:00