diff options
Diffstat (limited to 'arch/arm64/kernel/process.c')
| -rw-r--r-- | arch/arm64/kernel/process.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 80624829db61..48eea6866c67 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -265,9 +265,6 @@ int copy_thread(unsigned long clone_flags, unsigned long stack_start, if (stack_start) { if (is_compat_thread(task_thread_info(p))) childregs->compat_sp = stack_start; - /* 16-byte aligned stack mandatory on AArch64 */ - else if (stack_start & 15) - return -EINVAL; else childregs->sp = stack_start; } @@ -382,13 +379,14 @@ unsigned long arch_align_stack(unsigned long sp) return sp & ~0xf; } -static unsigned long randomize_base(unsigned long base) -{ - unsigned long range_end = base + (STACK_RND_MASK << PAGE_SHIFT) + 1; - return randomize_range(base, range_end, 0) ? : base; -} - unsigned long arch_randomize_brk(struct mm_struct *mm) { - return randomize_base(mm->brk); + unsigned long range_end = mm->brk; + + if (is_compat_task()) + range_end += 0x02000000; + else + range_end += 0x40000000; + + return randomize_range(mm->brk, range_end, 0) ? : mm->brk; } |