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 X-Spam-Level: X-Spam-Status: No, score=-20.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6F034C432BE for ; Fri, 23 Jul 2021 03:58:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5863960E9C for ; Fri, 23 Jul 2021 03:58:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233976AbhGWDR0 (ORCPT ); Thu, 22 Jul 2021 23:17:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:37292 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233642AbhGWDRI (ORCPT ); Thu, 22 Jul 2021 23:17:08 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id BECB460EC0; Fri, 23 Jul 2021 03:57:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1627012662; bh=uIO2cszPdhBYJGfbs19fiW03dSSWxLg/CsSfze1N1yU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VPxjsF1vcccZIrCQFb6Y7egxFFz/WIvBMprja9bqqZS/WVFTuDiygzxhUdN9ek03O izugaPgAg985K7si2P3DMyUKzmQtBjTdvCilxfESwyriqq6eqT2aJ50taQ4A53UtMt CgKG5cQbIU1d2JZ4HMjPPFpc3i9I6nQiWBRCpTOKL8Ik/7hqXnCaynEmJDF/hSDFB5 loAZ1W9vwKwp2NpkUxAR2pHxm0JxyGPp0TEEPmP12ch4n/flF0eF/2SiWG8f2FdL9C 35Rmared8PiJNoJDxUthmu8Ohh/3vzE5HzcaS3K+Dd0vJ9z7wnBNkF9Ie7ssJWTpZc BO3d8yf50YQxQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Cristian Marussi , Vincent Guittot , Sudeep Holla , Sasha Levin , linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 5.13 15/19] firmware: arm_scmi: Fix range check for the maximum number of pending messages Date: Thu, 22 Jul 2021 23:57:16 -0400 Message-Id: <20210723035721.531372-15-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210723035721.531372-1-sashal@kernel.org> References: <20210723035721.531372-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Cristian Marussi [ Upstream commit bdb8742dc6f7c599c3d61959234fe4c23638727b ] SCMI message headers carry a sequence number and such field is sized to allow for MSG_TOKEN_MAX distinct numbers; moreover zero is not really an acceptable maximum number of pending in-flight messages. Fix accordingly the checks performed on the value exported by transports in scmi_desc.max_msg Link: https://lore.kernel.org/r/20210712141833.6628-3-cristian.marussi@arm.com Reported-by: Vincent Guittot Signed-off-by: Cristian Marussi [sudeep.holla: updated the patch title and error message] Signed-off-by: Sudeep Holla Signed-off-by: Sasha Levin --- drivers/firmware/arm_scmi/driver.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index ce81ed053876..b342490e032b 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -1022,8 +1022,9 @@ static int __scmi_xfer_info_init(struct scmi_info *sinfo, const struct scmi_desc *desc = sinfo->desc; /* Pre-allocated messages, no more than what hdr.seq can support */ - if (WARN_ON(desc->max_msg >= MSG_TOKEN_MAX)) { - dev_err(dev, "Maximum message of %d exceeds supported %ld\n", + if (WARN_ON(!desc->max_msg || desc->max_msg > MSG_TOKEN_MAX)) { + dev_err(dev, + "Invalid maximum messages %d, not in range [1 - %lu]\n", desc->max_msg, MSG_TOKEN_MAX); return -EINVAL; } -- 2.30.2