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 3EAEDC43381 for ; Mon, 1 Apr 2019 17:42:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 06A4C20883 for ; Mon, 1 Apr 2019 17:42:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554140551; bh=Jx2R8CtTMQ8QtFpruMhzVFakK/a9HUJyQ9ElEgwOy8w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=hkjIjO2r7PoBgDpPj4UxACaJijjUE5C1STbjIA0PboDNTMUKyqqZND07zO7t/ceZ3 8dGudYNyRLFWwOuWuvTD7OXLgFSPeKHehLWHegNFOnc7Jnd04ZpdJhAGxQ0PSBo0Po AL6JH82VJWqw5f0lx1u20O84zz48QeHWp14gjYmI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387723AbfDARhA (ORCPT ); Mon, 1 Apr 2019 13:37:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:49132 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387572AbfDARg7 (ORCPT ); Mon, 1 Apr 2019 13:36:59 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.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 392E320830; Mon, 1 Apr 2019 17:36:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554140218; bh=Jx2R8CtTMQ8QtFpruMhzVFakK/a9HUJyQ9ElEgwOy8w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iXL+HF4s0bR6dmDq26oYmyE/X7I1qK7+PU3ykNlFUMWuD5K7nY85ed6Z2Nzk8PS8l i6PCZYyVB2m7A//amrhLU719bSBtCK0+ZFU3j61inpVubH4gfjm4MSje9Ofj5nZvKp RtUYXY4VVIPMJrbQZLpQZQohOYuqcJ/7HPYJ5/5A= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, jean-luc malet , Jan Kara Subject: [PATCH 3.18 01/50] udf: Fix crash on IO error during truncate Date: Mon, 1 Apr 2019 19:02:44 +0200 Message-Id: <20190401170041.400924310@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190401170041.257273804@linuxfoundation.org> References: <20190401170041.257273804@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 3.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jan Kara commit d3ca4651d05c0ff7259d087d8c949bcf3e14fb46 upstream. When truncate(2) hits IO error when reading indirect extent block the code just bugs with: kernel BUG at linux-4.15.0/fs/udf/truncate.c:249! ... Fix the problem by bailing out cleanly in case of IO error. CC: stable@vger.kernel.org Reported-by: jean-luc malet Signed-off-by: Jan Kara Signed-off-by: Greg Kroah-Hartman --- fs/udf/truncate.c | 3 +++ 1 file changed, 3 insertions(+) --- a/fs/udf/truncate.c +++ b/fs/udf/truncate.c @@ -261,6 +261,9 @@ void udf_truncate_extents(struct inode * epos.block = eloc; epos.bh = udf_tread(sb, udf_get_lb_pblock(sb, &eloc, 0)); + /* Error reading indirect block? */ + if (!epos.bh) + return; if (elen) indirect_ext_len = (elen + sb->s_blocksize - 1) >>