From patchwork Thu Oct 10 13:13:33 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 11183555 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 874BE76 for ; Thu, 10 Oct 2019 13:14:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 68D3F21D80 for ; Thu, 10 Oct 2019 13:14:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570713295; bh=hM0EHiZ+lbdsBaz/exs9ZfPI8jQI0gHEeaPxLpf9EPs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=tbTkX0oi/l5ApzESIy6+dxD+4VTBIhKu7j+WUnNeEEJbag2Dh+MlRaz1iqTPQTrM7 EYjomlwpFC93oqIHjZhduGlQqVCODhSnWZCTv2IYtnFsCseOZYoZQHHOR8H5mZr7Tv 9QXQjqeYpMggm5JKfdPsR78fIEJc0c7IK/wTLQkw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388175AbfJJNOw (ORCPT ); Thu, 10 Oct 2019 09:14:52 -0400 Received: from mail-lj1-f193.google.com ([209.85.208.193]:37325 "EHLO mail-lj1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388023AbfJJNOj (ORCPT ); Thu, 10 Oct 2019 09:14:39 -0400 Received: by mail-lj1-f193.google.com with SMTP id l21so6170980lje.4; Thu, 10 Oct 2019 06:14:38 -0700 (PDT) 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=s1+YBubYAy3yg+TIRBWGGXrMgcLsTM12YLsh849J2aI=; b=GCr/BKYneZjSwP7jPBlb57caufJrp63/BJh+AMpnpy3T46QUyd0PB7z3TKPlz/5xmb 06BLf9DqaTSxVW8HGBv20bhkTfNZtZR8/ZFTA+hUJqYmog6w1FhiDCwNc/ii/kuTYizt 1PimM7DuCLDTY9YmidqlhDQOOybJdU1GeeR33idUDRiXvaMlSOKfq0EIeC1TwP16Me15 q2nHXRk+ucRL+MPVhmEf09UHJgASZSWpxvghJdOUq6UtFXOkeOCPOueXG/DAAzLx1jWq FeDivUhIp5k7UaF5IxOBuak3Jn5g9oZu8YpgU99zIpEjau4XONmzvEjZHwmUhSQIxaFu nzvQ== X-Gm-Message-State: APjAAAW4L0Rk+//uheyRhWs5FNdUMoD+vuhWF+tdQSOr3/HjgH7YDwb2 eQpkFOFJ9yupSGtwkUw8Ewxs4Y4v X-Google-Smtp-Source: APXvYqyGy/J5HJ8vBpZO6LgQKgo1ma21ffDHecTu24LtFMjl2KdmKbxfJ1wNcSxoN50D6wfsye9EWA== X-Received: by 2002:a2e:964c:: with SMTP id z12mr6158807ljh.79.1570713277523; Thu, 10 Oct 2019 06:14:37 -0700 (PDT) Received: from xi.terra (c-51f1e055.07-184-6d6c6d4.bbcust.telenor.se. [85.224.241.81]) by smtp.gmail.com with ESMTPSA id h3sm1238457lfc.26.2019.10.10.06.14.34 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 10 Oct 2019 06:14:35 -0700 (PDT) Received: from johan by xi.terra with local (Exim 4.92.2) (envelope-from ) id 1iIYHF-0006Az-Mh; Thu, 10 Oct 2019 15:14:45 +0200 From: Johan Hovold To: Rob Clark , Sean Paul , Fabien Dessenne , Mauro Carvalho Chehab , Harald Freudenberger Cc: David Airlie , Daniel Vetter , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-s390@vger.kernel.org, Greg Kroah-Hartman , Johan Hovold , stable , Martin Schwidefsky Subject: [PATCH 4/4] s390/zcrypt: fix memleak at release Date: Thu, 10 Oct 2019 15:13:33 +0200 Message-Id: <20191010131333.23635-5-johan@kernel.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191010131333.23635-1-johan@kernel.org> References: <20191010131333.23635-1-johan@kernel.org> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org If a process is interrupted while accessing the crypto device and the global ap_perms_mutex is contented, release() could return early and fail to free related resources. Fixes: 00fab2350e6b ("s390/zcrypt: multiple zcrypt device nodes support") Cc: stable # 4.19 Cc: Harald Freudenberger Cc: Martin Schwidefsky Signed-off-by: Johan Hovold --- drivers/s390/crypto/zcrypt_api.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c index 45bdb47f84c1..9157e728a362 100644 --- a/drivers/s390/crypto/zcrypt_api.c +++ b/drivers/s390/crypto/zcrypt_api.c @@ -522,8 +522,7 @@ static int zcrypt_release(struct inode *inode, struct file *filp) if (filp->f_inode->i_cdev == &zcrypt_cdev) { struct zcdn_device *zcdndev; - if (mutex_lock_interruptible(&ap_perms_mutex)) - return -ERESTARTSYS; + mutex_lock(&ap_perms_mutex); zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev); mutex_unlock(&ap_perms_mutex); if (zcdndev) {