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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 C8EAEC433DF for ; Mon, 29 Jun 2020 20:00:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AAFDF20672 for ; Mon, 29 Jun 2020 20:00:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1593460837; bh=eyHmQB9Z/yvGy0UPdwRfvNnC+Pc8b1C8bJqVPS9nQMA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=kXcoab4yX/b3rqc8aQKVIJX6/6LOsl0ouKsS54PN2YWmxk9iltNb3r/11gwUKskF8 UVg1J47puk/FWF150J8UiVBkMN581N3jCj/rkJWt2HvP7LfG24PB8dZgNEL9gZ7oyC 0kCty1ecEFe5iWx27MXJEsFHklxmvykfdtWIVL+o= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388450AbgF2UAf (ORCPT ); Mon, 29 Jun 2020 16:00:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:47668 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387567AbgF2TkQ (ORCPT ); Mon, 29 Jun 2020 15:40:16 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 90F3624884; Mon, 29 Jun 2020 15:26:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1593444381; bh=eyHmQB9Z/yvGy0UPdwRfvNnC+Pc8b1C8bJqVPS9nQMA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sW6nHVa5ux2uCEpfF+nAD84eEopxPvyxuLozSwYx7Y3FvtNQRbS5pjTd4AUvjONU2 pXWDtGqUqxzG39WNc8qxCxurxsPPSh470joMVE3P9DyRMJqud9YHNpBtbfJqwQZ9C7 Jc9y7Lo1ep2drWQm1Kjvhh+sk8jnHGmfH48SF8pM= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Zheng Bin , Christoph Hellwig , Bart Van Assche , Jens Axboe , Greg Kroah-Hartman Subject: [PATCH 5.4 058/178] loop: replace kill_bdev with invalidate_bdev Date: Mon, 29 Jun 2020 11:23:23 -0400 Message-Id: <20200629152523.2494198-59-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200629152523.2494198-1-sashal@kernel.org> References: <20200629152523.2494198-1-sashal@kernel.org> MIME-Version: 1.0 X-KernelTest-Patch: http://kernel.org/pub/linux/kernel/v5.x/stable-review/patch-5.4.50-rc1.gz X-KernelTest-Tree: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git X-KernelTest-Branch: linux-5.4.y X-KernelTest-Patches: git://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git X-KernelTest-Version: 5.4.50-rc1 X-KernelTest-Deadline: 2020-07-01T15:25+00:00 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Zheng Bin commit f4bd34b139a3fa2808c4205f12714c65e1548c6c upstream. When a filesystem is mounted on a loop device and on a loop ioctl LOOP_SET_STATUS64, because of kill_bdev, buffer_head mappings are getting destroyed. kill_bdev truncate_inode_pages truncate_inode_pages_range do_invalidatepage block_invalidatepage discard_buffer -->clear BH_Mapped flag sb_bread __bread_gfp bh = __getblk_gfp -->discard_buffer clear BH_Mapped flag __bread_slow submit_bh submit_bh_wbc BUG_ON(!buffer_mapped(bh)) --> hit this BUG_ON Fixes: 5db470e229e2 ("loop: drop caches if offset or block_size are changed") Signed-off-by: Zheng Bin Reviewed-by: Christoph Hellwig Reviewed-by: Bart Van Assche Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- drivers/block/loop.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/block/loop.c b/drivers/block/loop.c index 57ed6b70d2950..565e35e69f249 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -1284,7 +1284,7 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info) if (lo->lo_offset != info->lo_offset || lo->lo_sizelimit != info->lo_sizelimit) { sync_blockdev(lo->lo_device); - kill_bdev(lo->lo_device); + invalidate_bdev(lo->lo_device); } /* I/O need to be drained during transfer transition */ @@ -1558,12 +1558,12 @@ static int loop_set_block_size(struct loop_device *lo, unsigned long arg) if (lo->lo_queue->limits.logical_block_size != arg) { sync_blockdev(lo->lo_device); - kill_bdev(lo->lo_device); + invalidate_bdev(lo->lo_device); } blk_mq_freeze_queue(lo->lo_queue); - /* kill_bdev should have truncated all the pages */ + /* invalidate_bdev should have truncated all the pages */ if (lo->lo_queue->limits.logical_block_size != arg && lo->lo_device->bd_inode->i_mapping->nrpages) { err = -EAGAIN; -- 2.25.1