[RFC PATCH 08/15] mm: kmemleak: Don't assume the kernel stack size

[Mostafa Saleh]

kmemleak_scan_task_stacks() assumes that the kernel stack size is
THREAD_SIZE.
The allocated kernel stack size may not be THREAD_SIZE anymore, rely
on the newly introduced helpers task_stack_{low, high}()

Signed-off-by: Mostafa Saleh <smostafa@xxxxxxxxxx>
---
 mm/kmemleak.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index 8fa409a4f9fb..72e2c628a20b 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -1749,7 +1749,7 @@ static void kmemleak_scan_task_stacks(void)
 			void *stack = try_get_task_stack(p);
 
 			if (stack) {
-				stop = scan_block(stack, stack + THREAD_SIZE, NULL);
+				stop = scan_block(task_stack_low(p), task_stack_high(p), NULL);
 				put_task_stack(p);
 			}
 			put_task_struct(p);
-- 
2.56.0.rc1.315.gc6ed9934b7-goog