From patchwork Thu Jan 2 22:07:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 234717 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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, 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 CD592C3276F for ; Thu, 2 Jan 2020 22:30:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A461122525 for ; Thu, 2 Jan 2020 22:30:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578004236; bh=wtmGKq4gh6D+PVyTFkCmv2SYRQfmZQki6Ddg5KynCq8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=IxBf/Vi29qk5mMyqbbh5FMbi5AUTAFYX2EAEONno0LOXYlm4dmLSLgUwaMMgyIq5K Xu+owyEf2pCxno3in3nnnksHcPA5+qywTLBHXQgG06mVy/NWbHRoNVgM1EiANCOUvA 7b2VOToSDVGny8dH2P0kADQdU7Sij3goLwQAHeDc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730028AbgABWa2 (ORCPT ); Thu, 2 Jan 2020 17:30:28 -0500 Received: from mail.kernel.org ([198.145.29.99]:34266 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729907AbgABWa1 (ORCPT ); Thu, 2 Jan 2020 17:30:27 -0500 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 5689621835; Thu, 2 Jan 2020 22:30:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578004226; bh=wtmGKq4gh6D+PVyTFkCmv2SYRQfmZQki6Ddg5KynCq8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WWQ/dvHw7MWoQUUZG7hGXw5BWbUWnKrbaz2nGlnlFRHVis9aV+rGbh0IT+2ZsSD+F YalkLiofOh8115rEZyh+I3GvQsHMkqcj2RQfcnRtvaWfKCIm806YQuFZ+sWo1Fot8d dK7vwR6yQ2vJrhTcVC+RPvhCUzocNfCwXT73IjVU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , David Sterba , Sasha Levin Subject: [PATCH 4.9 090/171] btrfs: return error pointer from alloc_test_extent_buffer Date: Thu, 2 Jan 2020 23:07:01 +0100 Message-Id: <20200102220559.585238593@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200102220546.960200039@linuxfoundation.org> References: <20200102220546.960200039@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Dan Carpenter [ Upstream commit b6293c821ea8fa2a631a2112cd86cd435effeb8b ] Callers of alloc_test_extent_buffer have not correctly interpreted the return value as error pointer, as alloc_test_extent_buffer should behave as alloc_extent_buffer. The self-tests were unaffected but btrfs_find_create_tree_block could call both functions and that would cause problems up in the call chain. Fixes: faa2dbf004e8 ("Btrfs: add sanity tests for new qgroup accounting code") CC: stable@vger.kernel.org # 4.4+ Signed-off-by: Dan Carpenter Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Sasha Levin --- fs/btrfs/extent_io.c | 6 ++++-- fs/btrfs/tests/free-space-tree-tests.c | 6 +++--- fs/btrfs/tests/qgroup-tests.c | 4 ++-- 3 files changed, 9 insertions(+), 7 deletions(-) diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 4d901200be13..37a28e2369b9 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -4994,12 +4994,14 @@ struct extent_buffer *alloc_test_extent_buffer(struct btrfs_fs_info *fs_info, return eb; eb = alloc_dummy_extent_buffer(fs_info, start, nodesize); if (!eb) - return NULL; + return ERR_PTR(-ENOMEM); eb->fs_info = fs_info; again: ret = radix_tree_preload(GFP_NOFS); - if (ret) + if (ret) { + exists = ERR_PTR(ret); goto free_eb; + } spin_lock(&fs_info->buffer_lock); ret = radix_tree_insert(&fs_info->buffer_radix, start >> PAGE_SHIFT, eb); diff --git a/fs/btrfs/tests/free-space-tree-tests.c b/fs/btrfs/tests/free-space-tree-tests.c index a724d9a79bd2..5e3b875d87e2 100644 --- a/fs/btrfs/tests/free-space-tree-tests.c +++ b/fs/btrfs/tests/free-space-tree-tests.c @@ -476,9 +476,9 @@ static int run_test(test_func_t test_func, int bitmaps, u32 sectorsize, root->node = alloc_test_extent_buffer(root->fs_info, nodesize, nodesize); - if (!root->node) { - test_msg("Couldn't allocate dummy buffer\n"); - ret = -ENOMEM; + if (IS_ERR(root->node)) { + test_msg("couldn't allocate dummy buffer\n"); + ret = PTR_ERR(root->node); goto out; } btrfs_set_header_level(root->node, 0); diff --git a/fs/btrfs/tests/qgroup-tests.c b/fs/btrfs/tests/qgroup-tests.c index 9c6666692341..e0aa6b9786fa 100644 --- a/fs/btrfs/tests/qgroup-tests.c +++ b/fs/btrfs/tests/qgroup-tests.c @@ -488,9 +488,9 @@ int btrfs_test_qgroups(u32 sectorsize, u32 nodesize) */ root->node = alloc_test_extent_buffer(root->fs_info, nodesize, nodesize); - if (!root->node) { + if (IS_ERR(root->node)) { test_msg("Couldn't allocate dummy buffer\n"); - ret = -ENOMEM; + ret = PTR_ERR(root->node); goto out; } btrfs_set_header_level(root->node, 0);