From patchwork Sun Mar 5 12:34:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Namjae Jeon X-Patchwork-Id: 1751918 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-cifs-owner@vger.kernel.org; receiver=) Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by legolas.ozlabs.org (Postfix) with ESMTP id 4PV1Pd0k7rz1yWw for ; Sun, 5 Mar 2023 23:35:01 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229676AbjCEMfA (ORCPT ); Sun, 5 Mar 2023 07:35:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43346 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229643AbjCEMe7 (ORCPT ); Sun, 5 Mar 2023 07:34:59 -0500 Received: from mail-pf1-f172.google.com (mail-pf1-f172.google.com [209.85.210.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 483A11BD1 for ; Sun, 5 Mar 2023 04:34:57 -0800 (PST) Received: by mail-pf1-f172.google.com with SMTP id y10so4080057pfi.8 for ; Sun, 05 Mar 2023 04:34:57 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678019696; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=s/Sav/z4jStbwj4LP4lq+DnMmWl3QrYqg63iHjU8heY=; b=685MGumMyyRgrTav84cme8mvEv9KgHlN6x8ALW4WOHKo2ggdPtQk+ujYZzdGITOAtS SiSGu/Cqy4KlR8nhpR/bk6J311P+23zzXTcCUezvs8Kyk3DWsuQoUbE7QjXTjMEhqcx1 WRTUd9Em9DKVlnwOmOOfqQmvnKT3ZZKT72Rm5bXhgIS/ROX93r48BQI79VAPe66vuu+0 iZ+Y6uxthOCmO8/hFEi6cCnVYsONEAg4HmqqgLOXlSqi19uWZGOzWzIBGVXUZKjyi/+5 K8PE4KGikbrCVzKQcQwiXJMD0O7y/MPbC80BaYSMeEyhZFuTX1l2++Hsh/iCRLT5mqQ0 2lNg== X-Gm-Message-State: AO0yUKWWkdfnh3Zos7c8cu/K4pSZeeEGfyFjpD22Le/f4JKdzWqmWkn3 gMq0nDhojW2oWezUDJt7Gc0Z6j94ccY= X-Google-Smtp-Source: AK7set9aB8CRHpCIKLp12gxaqtWLneQpmYEwz9bXjr2YIkOgG7J+V/zNrXM4MHvDZ/cZQ5QuMBy9/Q== X-Received: by 2002:aa7:9f81:0:b0:60b:81ae:c6d2 with SMTP id z1-20020aa79f81000000b0060b81aec6d2mr7603209pfr.27.1678019696512; Sun, 05 Mar 2023 04:34:56 -0800 (PST) Received: from localhost.localdomain ([211.49.23.9]) by smtp.gmail.com with ESMTPSA id e21-20020aa78255000000b005a8dcd32851sm4683257pfn.11.2023.03.05.04.34.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 05 Mar 2023 04:34:55 -0800 (PST) From: Namjae Jeon To: linux-cifs@vger.kernel.org Cc: smfrench@gmail.com, senozhatsky@chromium.org, tom@talpey.com, atteh.mailbox@gmail.com, Namjae Jeon , Dan Carpenter Subject: [PATCH 1/2] ksmbd: add low bound validation to FSCTL_SET_ZERO_DATA Date: Sun, 5 Mar 2023 21:34:42 +0900 Message-Id: <20230305123443.21509-1-linkinjeon@kernel.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Spam-Status: No, score=-1.4 required=5.0 tests=BAYES_00, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org Smatch static checker warning: fs/ksmbd/smb2pdu.c:7759 smb2_ioctl() warn: no lower bound on 'off' Fix unexpected result that could caused from negative off and bfz. Fixes: b5e5f9dfc915 ("ksmbd: check invalid FileOffset and BeyondFinalZero in FSCTL_ZERO_DATA") Reported-by: Dan Carpenter Signed-off-by: Namjae Jeon Reviewed-by: Sergey Senozhatsky --- fs/ksmbd/smb2pdu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index 81e987114206..b7a420e0fcc4 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -7757,7 +7757,7 @@ int smb2_ioctl(struct ksmbd_work *work) off = le64_to_cpu(zero_data->FileOffset); bfz = le64_to_cpu(zero_data->BeyondFinalZero); - if (off > bfz) { + if (off < 0 || bfz < 0 || off > bfz) { ret = -EINVAL; goto out; }