Subject: mm-protect-activate-switch-mm.patch From: Thomas Gleixner Date: Mon, 04 Jul 2011 09:48:40 +0200 Signed-off-by: Thomas Gleixner --- fs/exec.c | 2 ++ mm/mmu_context.c | 2 ++ 2 files changed, 4 insertions(+) Index: linux-stable/fs/exec.c =================================================================== --- linux-stable.orig/fs/exec.c +++ linux-stable/fs/exec.c @@ -836,10 +836,12 @@ static int exec_mmap(struct mm_struct *m } } task_lock(tsk); + local_irq_disable_rt(); active_mm = tsk->active_mm; tsk->mm = mm; tsk->active_mm = mm; activate_mm(active_mm, mm); + local_irq_enable_rt(); task_unlock(tsk); arch_pick_mmap_layout(mm); if (old_mm) { Index: linux-stable/mm/mmu_context.c =================================================================== --- linux-stable.orig/mm/mmu_context.c +++ linux-stable/mm/mmu_context.c @@ -26,6 +26,7 @@ void use_mm(struct mm_struct *mm) struct task_struct *tsk = current; task_lock(tsk); + local_irq_disable_rt(); active_mm = tsk->active_mm; if (active_mm != mm) { atomic_inc(&mm->mm_count); @@ -33,6 +34,7 @@ void use_mm(struct mm_struct *mm) } tsk->mm = mm; switch_mm(active_mm, mm, tsk); + local_irq_enable_rt(); task_unlock(tsk); if (active_mm != mm)