This is a note to let you know that I've just added the patch titled binder: use group leader instead of open thread to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. >From c4ea41ba195d01c9af66fb28711a16cc97caa9c5 Mon Sep 17 00:00:00 2001 From: Todd Kjos <tkjos@xxxxxxxxxxx> Date: Thu, 29 Jun 2017 12:01:36 -0700 Subject: binder: use group leader instead of open thread 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@xxxxxxxxxx> Cc: stable <stable@xxxxxxxxxxxxxxx> # 4.4+ Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/android/binder.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/android/binder.c b/drivers/android/binder.c index 157bd3e49ff4..9393924ae8e8 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -3460,8 +3460,8 @@ static int binder_open(struct inode *nodp, struct file *filp) 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); -- 2.13.3