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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 04920C433EF for ; Wed, 6 Oct 2021 07:16:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D872F61154 for ; Wed, 6 Oct 2021 07:16:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237409AbhJFHSA (ORCPT ); Wed, 6 Oct 2021 03:18:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49506 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237420AbhJFHRx (ORCPT ); Wed, 6 Oct 2021 03:17:53 -0400 Received: from mail-lf1-x130.google.com (mail-lf1-x130.google.com [IPv6:2a00:1450:4864:20::130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4D823C06174E for ; Wed, 6 Oct 2021 00:16:01 -0700 (PDT) Received: by mail-lf1-x130.google.com with SMTP id m3so6425258lfu.2 for ; Wed, 06 Oct 2021 00:16:01 -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=qLQ1B0XbhoR27QcdtLieBrU3iXl/MRVIKP5D+RBZ+zZI3rpJ4YAduePW5RAFnMwWtY IzEcaXV+jq4nTwZ+78yRdxll/2yB5fGI1CZm6guqkVNAAo8jFXzkSBjSIpEHgu9oxNmQ 49tF/YrA8FI8qxxUZe5jfdLb+vOfb85XExNYT2CwvyQhMkTlSRNgATXtlzrgemmWMgPv n4Mio/t9meJCoefgGLDjvz6t+pm/4OmRhtUJFNLfxmVvZDZqzXjpKANqxeZZejuEgbqT vm8ulcvGC2myrRHg/oRsoPVz/A2MBngKMXxTI89DwAXP+fhpIYflXufqInSgXEJsG2Qb 1t/g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; 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=soXZqVPL9JkWJOAQH/125x8JAJkm93gIkT5YTbjIgiaVw2bDBdIJk/SUvtcdIsv5aY NsRe+3ySN2HZUXBQUiiBh+1CamhSKobApxnfTPFbpjmqQNJWHvHXBSnKFgzk5gIhhjO0 2V9h7jS7A6HumXmk5c0MyuoO+NFtIXRultZHuzu50E2kYOIqzAU0u5SLVln3qAfu6HQb uA6zVb1yPyU8/fP9oVq+UPqKWV39le8VMgnihsB7Jkh5c/Q52q4MBHhSooDVi+QxmIB5 DKjkuysQWP/IKlxoUrg9wS428gxb3ducyPlhrLPC/rDjSTQcUnrm/iW86bPeEYScm5+T jFVQ== X-Gm-Message-State: AOAM533hXZvBLKPRaWBC+CG2OEpdVxu40R7M5XIFZkyMH0VBaXCX1bH+ tJITtmoPUha50ljX2hqYOoTIFYuDfTIUhA== X-Google-Smtp-Source: ABdhPJx8JCV8rcwVFwjsP9B+UkHcLTmCs0PuzEQqQFbB4E7Z32nm6qHW8yNbtzF1LVXtIqs45hUj4g== X-Received: by 2002:ac2:4285:: with SMTP id m5mr7719567lfh.343.1633504559560; Wed, 06 Oct 2021 00:15:59 -0700 (PDT) Received: from jade.ideon.se ([85.235.10.227]) by smtp.gmail.com with ESMTPSA id y7sm960376lfk.143.2021.10.06.00.15.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Oct 2021 00:15:59 -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 v6 3/6] tee: fix put order in teedev_close_context() Date: Wed, 6 Oct 2021 09:15:43 +0200 Message-Id: <20211006071546.2540920-4-jens.wiklander@linaro.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211006071546.2540920-1-jens.wiklander@linaro.org> References: <20211006071546.2540920-1-jens.wiklander@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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