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-rw-r--r--drivers/android/binder.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index f0ce9959d14d..796301a7c4fb 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -2744,6 +2744,10 @@ static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
/*pr_info("binder_ioctl: %d:%d %x %lx\n",
proc->pid, current->pid, cmd, arg);*/
+ if (unlikely(current->mm != proc->vma_vm_mm)) {
+ pr_err("current mm mismatch proc mm\n");
+ return -EINVAL;
+ }
trace_binder_ioctl(cmd, arg);
ret = wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
@@ -2958,6 +2962,7 @@ static int binder_open(struct inode *nodp, struct file *filp)
return -ENOMEM;
get_task_struct(current);
proc->tsk = current;
+ proc->vma_vm_mm = current->mm;
INIT_LIST_HEAD(&proc->todo);
init_waitqueue_head(&proc->wait);
proc->default_priority = task_nice(current);