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| author | Vyacheslav Cherkashin <v.cherkashin@samsung.com> | 2015-09-01 18:52:45 +0300 |
|---|---|---|
| committer | Dmitry Kovalenko <d.kovalenko@samsung.com> | 2015-09-07 01:33:35 -0700 |
| commit | 92d6e368e96cc8b0ec166c75f6d04e5b7506b1e7 (patch) | |
| tree | 1eceb2f1909dbf7348da538d94f603c99118c734 | |
| parent | 0031104ca9afac91f827f8330ef278ffb0de411d (diff) | |
| download | swap-modules-92d6e368e96cc8b0ec166c75f6d04e5b7506b1e7.tar.gz swap-modules-92d6e368e96cc8b0ec166c75f6d04e5b7506b1e7.tar.bz2 swap-modules-92d6e368e96cc8b0ec166c75f6d04e5b7506b1e7.zip | |
[FIX] Take mmap_sem on urp disarming in mm_release
Change-Id: I565d7f3d611f4173fd751014bd7519ccf7fc6218
Signed-off-by: Vyacheslav Cherkashin <v.cherkashin@samsung.com>
| -rw-r--r-- | us_manager/helper.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/us_manager/helper.c b/us_manager/helper.c index e5eeb2cb..3c338e86 100644 --- a/us_manager/helper.c +++ b/us_manager/helper.c @@ -388,7 +388,15 @@ static void unregister_cp(void) static unsigned long mr_cb(void *data) { struct task_struct *task = *(struct task_struct **)data; + struct mm_struct *mm = task->mm; + if (mm == NULL) { + pr_err("mm is NULL\n"); + return 0; + } + + /* TODO: this lock for synchronizing to disarm urp */ + down_write(&mm->mmap_sem); if (task->tgid != task->pid) { struct sspt_proc *proc; struct hlist_head head = HLIST_HEAD_INIT; @@ -414,6 +422,7 @@ static unsigned long mr_cb(void *data) } else { call_mm_release(task); } + up_write(&mm->mmap_sem); return 0; } |