static void oz_cdev_release_ctx(struct oz_serial_ctx *ctx)
{
	if (atomic_dec_and_test(&ctx->ref_count)) {
		oz_dbg(ON, "Dealloc serial context\n");
		kfree(ctx);
	}
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.