On Tue, Jan 19, 2016 at 11:45:36AM +0800, Chen Feng wrote: > When a process fork a child process, we should not allow the > child process use the binder which opened by parent process. > > But if the binder-object creater is a thread of one process who exit, > the other thread can also use this binder-object normally. > We can distinguish this by the member proc->tsk->mm. > If the thread exit the tsk->mm will be NULL. > > proc->tsk->mm != current->mm && proc->tsk->mm > > So only allow the shared mm_struct to use the same binder-object and > check the existence of mm_struct. > > Signed-off-by: Chen Feng <puck.chen@xxxxxxxxxxxxx> > Signed-off-by: Wei Dong <weidong2@xxxxxxxxxxxxx> > Signed-off-by: Junmin Zhao <zhaojunmin@xxxxxxxxxx> > Reviewed-by: Zhuangluan Su <suzhuangluan@xxxxxxxxxxxxx> > --- > drivers/android/binder.c | 2 ++ > 1 file changed, 2 insertions(+) Why resend? What changed from the previous version? greg k-h _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
