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 7144A8F5B for ; Sun, 16 Jul 2023 20:28:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EA4D5C433C8; Sun, 16 Jul 2023 20:28:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689539313; bh=kJJU+sMSmCtJ1s8/7v0u20ughp1MwB84aOpCY8bf4l0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NMhSSQLCHBhZY9ZxHZy8UdL5TQdZkRnWkB/5fUhda+pkQICDstJ0x2oECoWKjqTXC L4mjKghSgv0wA0370zdU8WoRVVEXJgF7wdaNp7RbvZMkmArkpunEikfdKOvJpVS097 oP4FoS876HLVvYbsipzyqoqSHzlXuwVCc8FMEpzg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Qu Wenruo , Filipe Manana , David Sterba Subject: [PATCH 6.4 764/800] btrfs: fix extent buffer leak after tree mod log failure at split_node() Date: Sun, 16 Jul 2023 21:50:17 +0200 Message-ID: <20230716195006.895915887@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230716194949.099592437@linuxfoundation.org> References: <20230716194949.099592437@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 commit ede600e497b1461d06d22a7d17703d9096868bc3 upstream. 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: Greg Kroah-Hartman --- fs/btrfs/ctree.c | 2 ++ 1 file changed, 2 insertions(+) --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -2982,6 +2982,8 @@ static noinline int split_node(struct bt ret = btrfs_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; }