On 4/18/19 12:32 AM, Kees Cook wrote:
On Wed, Apr 17, 2019 at 12:25 AM Alexandre Ghiti <alex@xxxxxxxx> wrote:
Each architecture has its own way to determine if a task is a compat task,
by using is_compat_task in arch_mmap_rnd, it allows more genericity and
then it prepares its moving to mm/.
Signed-off-by: Alexandre Ghiti <alex@xxxxxxxx>
Acked-by: Kees Cook <keescook@xxxxxxxxxxxx>
Thanks !
-Kees
---
arch/arm64/mm/mmap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/mm/mmap.c b/arch/arm64/mm/mmap.c
index 842c8a5fcd53..ed4f9915f2b8 100644
--- a/arch/arm64/mm/mmap.c
+++ b/arch/arm64/mm/mmap.c
@@ -54,7 +54,7 @@ unsigned long arch_mmap_rnd(void)
unsigned long rnd;
#ifdef CONFIG_COMPAT
- if (test_thread_flag(TIF_32BIT))
+ if (is_compat_task())
rnd = get_random_long() & ((1UL << mmap_rnd_compat_bits) - 1);
else
#endif
--
2.20.1
