From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754668AbcDNJeA (ORCPT ); Thu, 14 Apr 2016 05:34:00 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:44142 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754611AbcDNJd5 (ORCPT ); Thu, 14 Apr 2016 05:33:57 -0400 Date: Thu, 14 Apr 2016 12:33:37 +0300 From: Dan Carpenter To: Gabriel Somlo Cc: "Michael S. Tsirkin" , qemu-devel@nongnu.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [patch] firmware: qemu_fw_cfg.c: potential unintialized variable Message-ID: <20160414093337.GD16549@mwanda> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.24 (2015-08-30) X-Source-IP: userv0022.oracle.com [156.151.31.74] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org It acpi_acquire_global_lock() return AE_NOT_CONFIGURED then "glk" isn't initialized, which, if you got very unlucky, could cause a bug. Signed-off-by: Dan Carpenter diff --git a/drivers/firmware/qemu_fw_cfg.c b/drivers/firmware/qemu_fw_cfg.c index d999fe3..0e20116 100644 --- a/drivers/firmware/qemu_fw_cfg.c +++ b/drivers/firmware/qemu_fw_cfg.c @@ -77,7 +77,7 @@ static inline u16 fw_cfg_sel_endianness(u16 key) static inline void fw_cfg_read_blob(u16 key, void *buf, loff_t pos, size_t count) { - u32 glk; + u32 glk = -1U; acpi_status status; /* If we have ACPI, ensure mutual exclusion against any potential