android: binder: Move buffer out of area shared with user space
Binder driver allocates buffer meta data in a region that is mapped
in user space. These meta data contain pointers in the kernel.
This patch allocates buffer meta data on the kernel heap that is
not mapped in user space, and uses a pointer to refer to the data mapped.
Signed-off-by: Sherry Yang <sherryy@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/android/binder_alloc.h b/drivers/android/binder_alloc.h
index 4f02cc0..dd5649b 100644
--- a/drivers/android/binder_alloc.h
+++ b/drivers/android/binder_alloc.h
@@ -57,7 +57,7 @@ struct binder_buffer {
size_t data_size;
size_t offsets_size;
size_t extra_buffers_size;
- uint8_t data[0];
+ void *data;
};
/**