From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0CA9817AA6 for ; Wed, 9 Aug 2023 11:26:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 804ABC433C7; Wed, 9 Aug 2023 11:26:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1691580398; bh=H3dHbyUUPcLq6mEgqYGT5CV0otHbyT8ujY10rOgRC44=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LsVyGTQ3/tvU/aq/fCH148uaQ+OkI2rj9UtpglR7yeaQHMuEZPCB0BG0/xZh9+iK2 rUORkygATM1uM2mzRLmdmgIxrVXM0Fv+jmvUlYx+X3aINVjeAZ8VzF5f3Jzt/8/cax iJQj9ZnjmCOrFOJwdSdEdpk1+Xv7li6bJOPT3hk0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Qu Wenruo , Filipe Manana , David Sterba , Sasha Levin Subject: [PATCH 5.4 011/154] btrfs: fix extent buffer leak after tree mod log failure at split_node() Date: Wed, 9 Aug 2023 12:40:42 +0200 Message-ID: <20230809103637.302284349@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230809103636.887175326@linuxfoundation.org> References: <20230809103636.887175326@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Filipe Manana [ Upstream commit ede600e497b1461d06d22a7d17703d9096868bc3 ] At split_node(), if we fail to log the tree mod log copy operation, we return without unlocking the split extent buffer we just allocated and without decrementing the reference we own on it. Fix this by unlocking it and decrementing the ref count before returning. Fixes: 5de865eebb83 ("Btrfs: fix tree mod logging") CC: stable@vger.kernel.org # 5.4+ Reviewed-by: Qu Wenruo Signed-off-by: Filipe Manana Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Sasha Levin --- fs/btrfs/ctree.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index 1420df997485a..608e41b61689c 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -3589,6 +3589,8 @@ static noinline int split_node(struct btrfs_trans_handle *trans, ret = tree_mod_log_eb_copy(split, c, 0, mid, c_nritems - mid); if (ret) { + btrfs_tree_unlock(split); + free_extent_buffer(split); btrfs_abort_transaction(trans, ret); return ret; } -- 2.39.2