From patchwork Mon Apr 17 03:26:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Xiubo Li X-Patchwork-Id: 673875 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 82518C77B77 for ; Mon, 17 Apr 2023 03:31:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230206AbjDQDbD (ORCPT ); Sun, 16 Apr 2023 23:31:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47508 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230226AbjDQDae (ORCPT ); Sun, 16 Apr 2023 23:30:34 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6FE88271B for ; Sun, 16 Apr 2023 20:29:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1681702176; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=2dB3coiHOgcNX2uvjLzFpBs76UbotdhO0Y0h1TMj50I=; b=K77/dnNEAQ36XZvZI/yReHB/kCUq3+39gmBms+Fi+SrXOxQAB+Nf5DVJm0jlBMyyQvD8rL 4328UP3NUmPSOxVug8ov2Vfq4hM2ci+4xkEeyJ3LRoVG+jt+s92T1IeGXLC71+DjR1GSO1 ii3K1obA65yAHvAWKSUEGX7Rk0oqVQs= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-558-e_l2WD-ROW-iL4_3bNIRoQ-1; Sun, 16 Apr 2023 23:29:33 -0400 X-MC-Unique: e_l2WD-ROW-iL4_3bNIRoQ-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id EBB401C07581; Mon, 17 Apr 2023 03:29:32 +0000 (UTC) Received: from li-a71a4dcc-35d1-11b2-a85c-951838863c8d.ibm.com.com (ovpn-12-181.pek2.redhat.com [10.72.12.181]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1864F2027044; Mon, 17 Apr 2023 03:29:28 +0000 (UTC) From: xiubli@redhat.com To: idryomov@gmail.com, ceph-devel@vger.kernel.org Cc: jlayton@kernel.org, vshankar@redhat.com, lhenriques@suse.de, mchangir@redhat.com, Xiubo Li Subject: [PATCH v19 27/70] ceph: fix base64 encoded name's length check in ceph_fname_to_usr() Date: Mon, 17 Apr 2023 11:26:11 +0800 Message-Id: <20230417032654.32352-28-xiubli@redhat.com> In-Reply-To: <20230417032654.32352-1-xiubli@redhat.com> References: <20230417032654.32352-1-xiubli@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.4 Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org From: Xiubo Li The fname->name is based64_encoded names and the max long shouldn't exceed the NAME_MAX. The FSCRYPT_BASE64URL_CHARS(NAME_MAX) will be 255 * 4 / 3. [ xiubli: s/FSCRYPT_BASE64URL_CHARS/CEPH_BASE64_CHARS/ reported by kernel test robot ] Tested-by: Luís Henriques Tested-by: Venky Shankar Reviewed-by: Luís Henriques Signed-off-by: Xiubo Li Signed-off-by: Jeff Layton --- fs/ceph/crypto.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ceph/crypto.c b/fs/ceph/crypto.c index 03f4b9e73884..2222f4968f74 100644 --- a/fs/ceph/crypto.c +++ b/fs/ceph/crypto.c @@ -264,7 +264,7 @@ int ceph_fname_to_usr(const struct ceph_fname *fname, struct fscrypt_str *tname, } /* Sanity check that the resulting name will fit in the buffer */ - if (fname->name_len > CEPH_BASE64_CHARS(NAME_MAX)) + if (fname->name_len > NAME_MAX || fname->ctext_len > NAME_MAX) return -EIO; ret = __fscrypt_prepare_readdir(fname->dir);