diff --git a/fs/read_write.c b/fs/read_write.c
index 45d583c..819ef3f 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -477,7 +477,8 @@
 
 	ret = filp->f_op->write_iter(&kiocb, &iter);
 	BUG_ON(ret == -EIOCBQUEUED);
-	*ppos = kiocb.ki_pos;
+	if (ret > 0)
+		*ppos = kiocb.ki_pos;
 	return ret;
 }