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=-9.1 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=ham 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 7B707C282CE for ; Wed, 22 May 2019 19:55:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4304420862 for ; Wed, 22 May 2019 19:55:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558554958; bh=KjnceZrrK6pttVwb8hdNkEHs3mPHFshpUT6RlkLvtX4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=R7UOQSMGFbfWdoz5K+J8wkfGUX/R3jgmogPXOaf8xjLKq9/YyfG/Xpsr3hwRtrIab wAkt7gP7ucaTH+VrJbFrCezQgJYriuKBzFik7yUvY98vqUJIk143sHuG/MMn40SpuA pccgDcT6tCOWk1IVwsWMf4tGC28isPCOUyJgvyI4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733100AbfEVTz5 (ORCPT ); Wed, 22 May 2019 15:55:57 -0400 Received: from mail.kernel.org ([198.145.29.99]:46400 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730340AbfEVTZH (ORCPT ); Wed, 22 May 2019 15:25:07 -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 3F70D217D9; Wed, 22 May 2019 19:25:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558553107; bh=KjnceZrrK6pttVwb8hdNkEHs3mPHFshpUT6RlkLvtX4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0n3iklGxsNkm7n0u1r4+uEGD/re/HNY5pDLq9lfhxF1LMNjt6ymwA+NWmXvu2OZIH L6EfakA7QR1HpKEieln5rVIGIGjIBMSuJuVnMHpHD7Qos8dgViIMMKDuwpRAA1YGPz LRQ0OCox19F2soKW3Ztv7STyisWjr832Wo/zN+9o= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Qu Wenruo , Filipe Manana , Johannes Thumshirn , David Sterba , Sasha Levin , linux-btrfs@vger.kernel.org Subject: [PATCH AUTOSEL 5.0 051/317] btrfs: Don't panic when we can't find a root key Date: Wed, 22 May 2019 15:19:12 -0400 Message-Id: <20190522192338.23715-51-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190522192338.23715-1-sashal@kernel.org> References: <20190522192338.23715-1-sashal@kernel.org> MIME-Version: 1.0 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: Qu Wenruo [ Upstream commit 7ac1e464c4d473b517bb784f30d40da1f842482e ] When we failed to find a root key in btrfs_update_root(), we just panic. That's definitely not cool, fix it by outputting an unique error message, aborting current transaction and return -EUCLEAN. This should not normally happen as the root has been used by the callers in some way. Reviewed-by: Filipe Manana Reviewed-by: Johannes Thumshirn Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Sasha Levin --- fs/btrfs/root-tree.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c index 65bda0682928b..f51a4a425a457 100644 --- a/fs/btrfs/root-tree.c +++ b/fs/btrfs/root-tree.c @@ -137,11 +137,14 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root goto out; } - if (ret != 0) { - btrfs_print_leaf(path->nodes[0]); - btrfs_crit(fs_info, "unable to update root key %llu %u %llu", - key->objectid, key->type, key->offset); - BUG_ON(1); + if (ret > 0) { + btrfs_crit(fs_info, + "unable to find root key (%llu %u %llu) in tree %llu", + key->objectid, key->type, key->offset, + root->root_key.objectid); + ret = -EUCLEAN; + btrfs_abort_transaction(trans, ret); + goto out; } l = path->nodes[0]; -- 2.20.1