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 2E0F9CDB465 for ; Mon, 16 Oct 2023 08:47:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232764AbjJPIri (ORCPT ); Mon, 16 Oct 2023 04:47:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40524 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232905AbjJPIrd (ORCPT ); Mon, 16 Oct 2023 04:47:33 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 372EE9B for ; Mon, 16 Oct 2023 01:47:31 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 45C87C433C7; Mon, 16 Oct 2023 08:47:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1697446050; bh=ylfjCr0YfR0pUW63ms83f37UZY3pNB0WVvsggqwsAUY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=N/ECLEczu4GCPH9DaULMHtfpwOMHCzsqa215v522rbrJ5ZBXnQuMdVBW3V2WBjEVQ kwPoiKR9fkkjBkik9VIl4CR0u+jfXf/EqBasuo/TX5OQazbU81uhZms67nbp6T4fg/ /fEncReeUUWw0aQ6sgGTwl8NRoVJroUg8A1ZAfqg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dan Carpenter , Xiubo Li , Ilya Dryomov Subject: [PATCH 5.15 067/102] ceph: fix type promotion bug on 32bit systems Date: Mon, 16 Oct 2023 10:41:06 +0200 Message-ID: <20231016083955.488097101@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231016083953.689300946@linuxfoundation.org> References: <20231016083953.689300946@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dan Carpenter commit 07bb00ef00ace88dd6f695fadbba76565756e55c upstream. In this code "ret" is type long and "src_objlen" is unsigned int. The problem is that on 32bit systems, when we do the comparison signed longs are type promoted to unsigned int. So negative error codes from do_splice_direct() are treated as success instead of failure. Cc: stable@vger.kernel.org Fixes: 1b0c3b9f91f0 ("ceph: re-org copy_file_range and fix some error paths") Signed-off-by: Dan Carpenter Reviewed-by: Xiubo Li Signed-off-by: Ilya Dryomov Signed-off-by: Greg Kroah-Hartman --- fs/ceph/file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -2436,7 +2436,7 @@ static ssize_t __ceph_copy_file_range(st ret = do_splice_direct(src_file, &src_off, dst_file, &dst_off, src_objlen, flags); /* Abort on short copies or on error */ - if (ret < src_objlen) { + if (ret < (long)src_objlen) { dout("Failed partial copy (%zd)\n", ret); goto out; }