Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.12 85/99] binder: use group leader instead of open thread | Date | Mon, 28 Aug 2017 10:05:23 +0200 |
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4.12-stable review patch. If anyone has any objections, please let me know.
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From: Todd Kjos <tkjos@android.com>
commit c4ea41ba195d01c9af66fb28711a16cc97caa9c5 upstream.
The binder allocator assumes that the thread that called binder_open will never die for the lifetime of that proc. That thread is normally the group_leader, however it may not be. Use the group_leader instead of current.
Signed-off-by: Todd Kjos <tkjos@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/android/binder.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -3460,8 +3460,8 @@ static int binder_open(struct inode *nod proc = kzalloc(sizeof(*proc), GFP_KERNEL); if (proc == NULL) return -ENOMEM; - get_task_struct(current); - proc->tsk = current; + get_task_struct(current->group_leader); + proc->tsk = current->group_leader; INIT_LIST_HEAD(&proc->todo); init_waitqueue_head(&proc->wait); proc->default_priority = task_nice(current);
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