mm owner: fix race between swapoff and exit

[linux-2.6-block.git] / fs / exec.c

diff --git a/fs/exec.c b/fs/exec.c
index 32993beecbe91a10670cc4f5a9a72a5faf813c56..cecee501ce78805c32c9d007c658fce1e87b0a97 100644 (file)
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -752,11 +752,11 @@ static int exec_mmap(struct mm_struct *mm)
        tsk->active_mm = mm;
        activate_mm(active_mm, mm);
        task_unlock(tsk);
-       mm_update_next_owner(old_mm);
        arch_pick_mmap_layout(mm);
        if (old_mm) {
                up_read(&old_mm->mmap_sem);
                BUG_ON(active_mm != old_mm);
+               mm_update_next_owner(old_mm);
                mmput(old_mm);
                return 0;
        }