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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,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 37885C4320A for ; Fri, 23 Jul 2021 09:45:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 20E2260725 for ; Fri, 23 Jul 2021 09:45:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231273AbhGWJEw (ORCPT ); Fri, 23 Jul 2021 05:04:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54370 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231460AbhGWJEC (ORCPT ); Fri, 23 Jul 2021 05:04:02 -0400 Received: from mail-lj1-x234.google.com (mail-lj1-x234.google.com [IPv6:2a00:1450:4864:20::234]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AEE0BC061799 for ; Fri, 23 Jul 2021 02:44:35 -0700 (PDT) Received: by mail-lj1-x234.google.com with SMTP id f12so1011097ljn.1 for ; Fri, 23 Jul 2021 02:44:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=JoodeoEbWA8KFPSDaqBt6HBmf+JeOe0hbWt7ocF/yag=; b=IQupQu096dOf2RXy1dTEeXIOMGbe6WjJhcaIEXhbvkmYHJXjdMb0znsum0XkoEfm0b oZAyT0no0mbv1QNkEJCIL8Ycp+A2wxAnySr21P6vwmTnbM0x54jAaRuSlsmJSsk9KvIc 3+lzExnUxYmBgMM6D2awrRdlxwmCx0eFrn77sO8iolEDUBqktiTOwi+QBv6ve/3SK65f welVLkY/7gXxj/KGu52/SQBYzf7iXLxHHs5Ovc7izB3FaJhmLEwKcyT/7PTU41IsPpqu XvEPhAOHUMGRifagj7+ZhmEkZsJdF9rYyoUuXIHuqVnL/DUQ4h6w1oeymhdrXUOT6laJ 6eQg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=JoodeoEbWA8KFPSDaqBt6HBmf+JeOe0hbWt7ocF/yag=; b=qIEMI4m5ZQsDAfg531BAtop4hDmV5YTHoftiuP8Y+61V7L7I26+IURWkHT/yQuc+Zc mAB/DQ5175BtGKbgcmsNsjRgKa54UonI4DIfv0B0bMM2FX9D1M6kxTt+QTuF25/2s44X SPF3I+AwDQXRiHHMxqsOKK/H6xEm2ZXWLI/JEuMbD5XbQwKRfQVRsaUW1etEESuBcWu8 62PSz4Clf9wty7ZZyu2Lhq03+RCkgbTMwx0RwUsbLDMfKbzPPTlQxBfI2QL5Cjbinz7Y S/439IDbalDia3VLHfR+oshDgfKdpXnS3UgduUXdifwFpIjTRv+kKjL5FkH6Wxh9rZRF QbTw== X-Gm-Message-State: AOAM532R+dpH4c00pOFcRxzkpZt0g5WWsj6DSIccSUETZ37JWj8sJC6v J0IFf18BbdMN2SFaEm23tvC3Ig== X-Google-Smtp-Source: ABdhPJxthOMwVWH+D74X2QymqEcjwWIzgiPvVu2K8kpmy+fsoCGXSl6heRTr6xFDRTRKY7MJE5SvuA== X-Received: by 2002:a2e:9b10:: with SMTP id u16mr2747522lji.228.1627033473706; Fri, 23 Jul 2021 02:44:33 -0700 (PDT) Received: from jade.urgonet (h-94-254-48-165.A175.priv.bahnhof.se. [94.254.48.165]) by smtp.gmail.com with ESMTPSA id f2sm403808ljq.131.2021.07.23.02.44.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 Jul 2021 02:44:33 -0700 (PDT) From: Jens Wiklander To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, op-tee@lists.trustedfirmware.org, devicetree@vger.kernel.org, linux-doc@vger.kernel.org Cc: Jerome Forissier , Etienne Carriere , Sumit Garg , Vincent Guittot , Rob Herring , Jonathan Corbet , Ard Biesheuvel , Marc Zyngier , Jens Wiklander Subject: [PATCH v3 3/6] tee: fix put order in teedev_close_context() Date: Fri, 23 Jul 2021 11:44:19 +0200 Message-Id: <20210723094422.2150313-4-jens.wiklander@linaro.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210723094422.2150313-1-jens.wiklander@linaro.org> References: <20210723094422.2150313-1-jens.wiklander@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Prior to this patch was teedev_close_context() calling tee_device_put() before teedev_ctx_put() leading to teedev_ctx_release() accessing ctx->teedev just after the reference counter was decreased on the teedev. Fix this by calling teedev_ctx_put() before tee_device_put(). Fixes: 217e0250cccb ("tee: use reference counting for tee_context") Signed-off-by: Jens Wiklander --- drivers/tee/tee_core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c index 2b37bc408fc3..85102d12d716 100644 --- a/drivers/tee/tee_core.c +++ b/drivers/tee/tee_core.c @@ -98,8 +98,10 @@ void teedev_ctx_put(struct tee_context *ctx) static void teedev_close_context(struct tee_context *ctx) { - tee_device_put(ctx->teedev); + struct tee_device *teedev = ctx->teedev; + teedev_ctx_put(ctx); + tee_device_put(teedev); } static int tee_open(struct inode *inode, struct file *filp) -- 2.31.1