From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D4E68C433FE for ; Wed, 24 Nov 2021 12:24:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244256AbhKXM2A (ORCPT ); Wed, 24 Nov 2021 07:28:00 -0500 Received: from mail.kernel.org ([198.145.29.99]:36508 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244137AbhKXMXB (ORCPT ); Wed, 24 Nov 2021 07:23:01 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id E539861052; Wed, 24 Nov 2021 12:13:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1637756029; bh=j1dDLAA5xFeV7uJcTZ1ri3BVmBrvnT3ACGQlQoLLuW4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tu56Eb/u/U3BPwTP27kKXjIOi15X6ojWldNZLARp9Yq2uKT4ljs4i1upm0TmTG3mj TqxRw9CYl4yUHvhPW+JC557ZL1pTTSGdr1xEC404lK5dff40OXN92WyDCEvQSFwufQ w+pO4VQeUwKt4vl96BPD7H/RVIwHjWlJ6z2dO19k= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , "Martin K. Petersen" , Sasha Levin Subject: [PATCH 4.9 127/207] scsi: csiostor: Uninitialized data in csio_ln_vnp_read_cbfn() Date: Wed, 24 Nov 2021 12:56:38 +0100 Message-Id: <20211124115708.161206042@linuxfoundation.org> X-Mailer: git-send-email 2.34.0 In-Reply-To: <20211124115703.941380739@linuxfoundation.org> References: <20211124115703.941380739@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dan Carpenter [ Upstream commit f4875d509a0a78ad294a1a538d534b5ba94e685a ] This variable is just a temporary variable, used to do an endian conversion. The problem is that the last byte is not initialized. After the conversion is completely done, the last byte is discarded so it doesn't cause a problem. But static checkers and the KMSan runtime checker can detect the uninitialized read and will complain about it. Link: https://lore.kernel.org/r/20211006073242.GA8404@kili Fixes: 5036f0a0ecd3 ("[SCSI] csiostor: Fix sparse warnings.") Signed-off-by: Dan Carpenter Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/csiostor/csio_lnode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/csiostor/csio_lnode.c b/drivers/scsi/csiostor/csio_lnode.c index 957767d383610..d1df694d9ed00 100644 --- a/drivers/scsi/csiostor/csio_lnode.c +++ b/drivers/scsi/csiostor/csio_lnode.c @@ -611,7 +611,7 @@ csio_ln_vnp_read_cbfn(struct csio_hw *hw, struct csio_mb *mbp) struct fc_els_csp *csp; struct fc_els_cssp *clsp; enum fw_retval retval; - __be32 nport_id; + __be32 nport_id = 0; retval = FW_CMD_RETVAL_G(ntohl(rsp->alloc_to_len16)); if (retval != FW_SUCCESS) { -- 2.33.0