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=-6.0 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 23515C4360F for ; Mon, 4 Mar 2019 08:22:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DB44C208E4 for ; Mon, 4 Mar 2019 08:22:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1551687755; bh=CEBzWTBsXf2BuP4bR+L3j/eCNtP8D6WcWgLXYM2LxeY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=MjQUS4CLb68QcxC9SFrlUCI+XkTdo5+sMxXuekOG027CoZKiv4YnLpV5miIKLMVA1 u4wfhEHqtTFivF/eH/VHjDENUI+QFBOV7buVYcPKsydQ7MkM9Spx2PJcRDYLeJhzy8 SqW9iOkQABm1zVj+KkeQ8fkoo8N6gyemQI+NWZBo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726181AbfCDIWd (ORCPT ); Mon, 4 Mar 2019 03:22:33 -0500 Received: from mail.kernel.org ([198.145.29.99]:37162 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725974AbfCDIWd (ORCPT ); Mon, 4 Mar 2019 03:22:33 -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 BFE7F20863; Mon, 4 Mar 2019 08:22:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1551687752; bh=CEBzWTBsXf2BuP4bR+L3j/eCNtP8D6WcWgLXYM2LxeY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dMQauq/tpSp5CTkgFHo7HIJiFBgA0Y52/Txrz4uiITu9YPSJXnOmlkhhCEw9+sL35 byCxD7Q8ZP1aMoQcPpRUp14+T4ATadbAgsgYfEbSEJcU7y1CaXiP1ps+hueTxwLz6A JP+Z3ahfjLI0RCnL9NJG7CcweXZh/lZ0laEN2VEw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Thomas Lindroth , Jan Kara , syzbot , Ming Lei , Tetsuo Handa , Jens Axboe Subject: [PATCH 4.9 01/32] Revert "loop: Fix double mutex_unlock(&loop_ctl_mutex) in loop_control_ioctl()" Date: Mon, 4 Mar 2019 09:21:49 +0100 Message-Id: <20190304081602.415115861@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190304081602.307094059@linuxfoundation.org> References: <20190304081602.307094059@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: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Greg Kroah-Hartman This reverts commit 5d3cf50105d007adc54949e0caeca1e944549723 which is commit 628bd85947091830a8c4872adfd5ed1d515a9cf2 upstream. It does not work properly in the 4.9.y tree and causes more problems than it fixes, so revert it. Reported-by: Thomas Lindroth Reported-by: Jan Kara Cc: syzbot Cc: Ming Lei Cc: Tetsuo Handa Cc: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- drivers/block/loop.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -1929,10 +1929,12 @@ 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;