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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 57D2DC4321E for ; Tue, 18 Jan 2022 03:23:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350476AbiARDXd (ORCPT ); Mon, 17 Jan 2022 22:23:33 -0500 Received: from dfw.source.kernel.org ([139.178.84.217]:32950 "EHLO dfw.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344590AbiARDJ1 (ORCPT ); Mon, 17 Jan 2022 22:09:27 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 9D30960B57; Tue, 18 Jan 2022 03:09:25 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4F610C36AF2; Tue, 18 Jan 2022 03:09:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1642475365; bh=ELfRStfHNKsOOsq2oe4qyi0/nGf+qt+zN6WciT1U+OI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dIhowbfDmycSQq1yeGJ1YubHNCQH8mTgRCQW+ufAeB92cXQ8InO5YoxLA1A3SO3rl a4ngXmq42Xgf2HqmyS3qm5ang0A+7s6Bs99GqqGB3aHnYjWbGhoaGgnp7vJkqBWf1Z x2mL9Fj2sDhKu8vEWSflcpg4O4lu3CibbbAWSgpTYRCXuVhQKUxjnFVqVWLkAAolXn xvhy0SZVJ+P5+UNWIV/A3Hu92Gs5l3/dmaW8vQNi3W+U0lCVhUqJtiAZ84LH4Zh8Za Kp6kOI7am1brYxk5nyPVzKIqRwncNitfCFqi+icRzVXipkw7doPvIzdTfr4DtYOIz8 YoL2a9bZjoxvQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Josef Bacik , David Sterba , Sasha Levin , clm@fb.com, linux-btrfs@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 22/29] btrfs: remove BUG_ON() in find_parent_nodes() Date: Mon, 17 Jan 2022 22:08:15 -0500 Message-Id: <20220118030822.1955469-22-sashal@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220118030822.1955469-1-sashal@kernel.org> References: <20220118030822.1955469-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Josef Bacik [ Upstream commit fcba0120edf88328524a4878d1d6f4ad39f2ec81 ] We search for an extent entry with .offset = -1, which shouldn't be a thing, but corruption happens. Add an ASSERT() for the developers, return -EUCLEAN for mortals. Signed-off-by: Josef Bacik Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Sasha Levin --- fs/btrfs/backref.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c index 228bfa19b745d..c59a13a53b1cc 100644 --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -975,7 +975,12 @@ static int find_parent_nodes(struct btrfs_trans_handle *trans, ret = btrfs_search_slot(trans, fs_info->extent_root, &key, path, 0, 0); if (ret < 0) goto out; - BUG_ON(ret == 0); + if (ret == 0) { + /* This shouldn't happen, indicates a bug or fs corruption. */ + ASSERT(ret != 0); + ret = -EUCLEAN; + goto out; + } #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS if (trans && likely(trans->type != __TRANS_DUMMY) && -- 2.34.1