From nobody Fri Oct 24 20:31:41 2025 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 7C0C1C28B2B for ; Mon, 15 Aug 2022 20:27:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347571AbiHOU0C (ORCPT ); Mon, 15 Aug 2022 16:26:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49154 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245711AbiHOUTI (ORCPT ); Mon, 15 Aug 2022 16:19:08 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1298679ECA; Mon, 15 Aug 2022 12:00:37 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id EB332B8105C; Mon, 15 Aug 2022 19:00:35 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 30F9CC433D6; Mon, 15 Aug 2022 19:00:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660590034; bh=YaFyEq5TNnM0erthFu+YMa+BtPUKxaeMZE5sVwUj5uM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AFWDe0AN35OYAJ4gawyCvW7ZSW+XkdNbcZfe2n+4nRrKwRGTiYb2doTrAbO0qwr5M kE7PB452JkO/2vnaORIDeAGxQc4jfSgjn9ufW+BfjtAdkQEOl9r6M0q5DxmS+T/FyK GXRyzjD/T0WEvTP/j6FxlHW50SMyYsZd5dfQyZJA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Namjae Jeon , Hyunchul Lee , Steve French , zdi-disclosures@trendmicro.com Subject: [PATCH 5.18 0099/1095] ksmbd: fix memory leak in smb2_handle_negotiate Date: Mon, 15 Aug 2022 19:51:38 +0200 Message-Id: <20220815180433.649914395@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220815180429.240518113@linuxfoundation.org> References: <20220815180429.240518113@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Namjae Jeon commit aa7253c2393f6dcd6a1468b0792f6da76edad917 upstream. The allocated memory didn't free under an error path in smb2_handle_negotiate(). Fixes: e2f34481b24d ("cifsd: add server-side procedures for SMB3") Cc: stable@vger.kernel.org Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-17815 Signed-off-by: Namjae Jeon Reviewed-by: Hyunchul Lee Signed-off-by: Steve French Signed-off-by: Greg Kroah-Hartman --- fs/ksmbd/smb2pdu.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -1139,12 +1139,16 @@ int smb2_handle_negotiate(struct ksmbd_w status); rsp->hdr.Status =3D status; rc =3D -EINVAL; + kfree(conn->preauth_info); + conn->preauth_info =3D NULL; goto err_out; } =20 rc =3D init_smb3_11_server(conn); if (rc < 0) { rsp->hdr.Status =3D STATUS_INVALID_PARAMETER; + kfree(conn->preauth_info); + conn->preauth_info =3D NULL; goto err_out; }