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=-7.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 5588CC282C5 for ; Thu, 24 Jan 2019 20:11:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1BA3B218A6 for ; Thu, 24 Jan 2019 20:11:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548360679; bh=qKn0W9CHfFclbT+CDQtmpQykHNQfgRS7Zfno8xp5VMU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=EyB7fayMoktBhadZ2VXV8sgIQ+U8hkNF3JEQRfMdDYWQr5+XPTc3BlkgnGt5CCd0U OgX4Qkv4U/1YWM15AEFF4HNqJIhDm3OziphMd/ZYM35/s2MR0nsFy1kcX1i2jIfRK1 RINpYOeHU31lR+8TQsc6EROk7Q1WbXE0osHd+QA0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730691AbfAXT1G (ORCPT ); Thu, 24 Jan 2019 14:27:06 -0500 Received: from mail.kernel.org ([198.145.29.99]:53314 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730316AbfAXT1G (ORCPT ); Thu, 24 Jan 2019 14:27:06 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E1B23218A6; Thu, 24 Jan 2019 19:27:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548358025; bh=qKn0W9CHfFclbT+CDQtmpQykHNQfgRS7Zfno8xp5VMU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Iq6XfCnFuXzGTAhTQHEE3JHn7lGd0/MbttI8oDX0L+vzAh3B2Fb3A9JvnG3Vub1M6 zMBrjgGWJ6PbP6aFqQyarcPfk9ExRQTXKnqavitMUjSAt+rFuHaPnANWYatxmMYm9Y UgRTRlFnXE8yeyaDVtsaADzzB3hJ4GZFBK0darxE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot , Ming Lei , Jan Kara , Tetsuo Handa , Jens Axboe Subject: [PATCH 4.4 070/104] loop: Fix double mutex_unlock(&loop_ctl_mutex) in loop_control_ioctl() Date: Thu, 24 Jan 2019 20:19:59 +0100 Message-Id: <20190124190203.322027635@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190124190154.968308875@linuxfoundation.org> References: <20190124190154.968308875@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tetsuo Handa commit 628bd85947091830a8c4872adfd5ed1d515a9cf2 upstream. Commit 0a42e99b58a20883 ("loop: Get rid of loop_index_mutex") forgot to remove mutex_unlock(&loop_ctl_mutex) from loop_control_ioctl() when replacing loop_index_mutex with loop_ctl_mutex. Fixes: 0a42e99b58a20883 ("loop: Get rid of loop_index_mutex") Reported-by: syzbot Reviewed-by: Ming Lei Reviewed-by: Jan Kara Signed-off-by: Tetsuo Handa Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- drivers/block/loop.c | 2 -- 1 file changed, 2 deletions(-) --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -1936,12 +1936,10 @@ static long loop_control_ioctl(struct fi break; if (lo->lo_state != Lo_unbound) { ret = -EBUSY; - mutex_unlock(&loop_ctl_mutex); break; } if (atomic_read(&lo->lo_refcnt) > 0) { ret = -EBUSY; - mutex_unlock(&loop_ctl_mutex); break; } lo->lo_disk->private_data = NULL;