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Diffstat (limited to 'arch/arm64/kernel/kaslr.c')
| -rw-r--r-- | arch/arm64/kernel/kaslr.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm64/kernel/kaslr.c b/arch/arm64/kernel/kaslr.c index 8b32a1f8f09f..582983920054 100644 --- a/arch/arm64/kernel/kaslr.c +++ b/arch/arm64/kernel/kaslr.c @@ -21,6 +21,7 @@ #include <asm/sections.h> u64 __read_mostly module_alloc_base; +u16 __initdata memstart_offset_seed; static __init u64 get_kaslr_seed(void *fdt) { @@ -123,6 +124,9 @@ u64 __init kaslr_early_init(u64 dt_phys) mask = ((1UL << (VA_BITS - 2)) - 1) & ~(SZ_2M - 1); offset = seed & mask; + /* use the top 16 bits to randomize the linear region */ + memstart_offset_seed = seed >> 48; + /* * The kernel Image should not extend across a 1GB/32MB/512MB alignment * boundary (for 4KB/16KB/64KB granule kernels, respectively). If this |