blob: 8dd324a46143aba953d6e651beeef546857a2505 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
Subject: mm-protect-activate-switch-mm.patch
From: Thomas Gleixner <tglx@linutronix.de>
Date: Mon, 04 Jul 2011 09:48:40 +0200
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
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)
|
