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 X-Spam-Level: X-Spam-Status: No, score=-6.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4589AC43219 for ; Tue, 30 Apr 2019 11:57:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0545421670 for ; Tue, 30 Apr 2019 11:57:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1556625476; bh=xkRTa80tLR3PcUsxWpLitr24AxedZYy0UVzAqQLKAZo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=yU9D8T/pIE6Lr8IiJ3zSG9g6S0qr9YQ6cLS6yEizQJB5DUDIJ3EEr8TAnkRHfT/j1 gvMPcHSaEjCXi1SVA+gi7Tr2Lik4qjeel7n3QYim5lE8v7vsMZ63Z5cJ8ab6lPSQki 5vhm9bjXcvZHNuxq4XUyjlHQ5JWTb9oAvDg3EG+g= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727893AbfD3L5z (ORCPT ); Tue, 30 Apr 2019 07:57:55 -0400 Received: from mail.kernel.org ([198.145.29.99]:33164 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730734AbfD3Lri (ORCPT ); Tue, 30 Apr 2019 07:47:38 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DF85120449; Tue, 30 Apr 2019 11:47:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1556624857; bh=xkRTa80tLR3PcUsxWpLitr24AxedZYy0UVzAqQLKAZo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=q+lfJ6EU8XiudHseZ0RPSg6H6wx7mzXVKSzTor/Lhwtr18/Rdfm5smb5Za6OZ/27W Y4oN8fjiatLwTUgDobOIMrCx/vnaqDi1JbC5VfT3cg8IMlr+lKrg5Q6VXpltfojMgI l0PN7FQEo6nivRgaG0fS+Rb0NJajrli25jSXt8ic= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jakub Kicinski , Dirk van der Merwe , "David S. Miller" Subject: [PATCH 4.19 100/100] net/tls: dont leak IV and record seq when offload fails Date: Tue, 30 Apr 2019 13:39:09 +0200 Message-Id: <20190430113613.561524608@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190430113608.616903219@linuxfoundation.org> References: <20190430113608.616903219@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jakub Kicinski [ Upstream commit 12c7686111326148b4b5db189130522a4ad1be4a ] When device refuses the offload in tls_set_device_offload_rx() it calls tls_sw_free_resources_rx() to clean up software context state. Unfortunately, tls_sw_free_resources_rx() does not free all the state tls_set_sw_offload() allocated - it leaks IV and sequence number buffers. All other code paths which lead to tls_sw_release_resources_rx() (which tls_sw_free_resources_rx() calls) free those right before the call. Avoid the leak by moving freeing of iv and rec_seq into tls_sw_release_resources_rx(). Fixes: 4799ac81e52a ("tls: Add rx inline crypto offload") Signed-off-by: Jakub Kicinski Reviewed-by: Dirk van der Merwe Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/tls/tls_device.c | 2 -- net/tls/tls_main.c | 5 +---- net/tls/tls_sw.c | 3 +++ 3 files changed, 4 insertions(+), 6 deletions(-) --- a/net/tls/tls_device.c +++ b/net/tls/tls_device.c @@ -911,8 +911,6 @@ void tls_device_offload_cleanup_rx(struc } out: up_read(&device_offload_lock); - kfree(tls_ctx->rx.rec_seq); - kfree(tls_ctx->rx.iv); tls_sw_release_resources_rx(sk); } --- a/net/tls/tls_main.c +++ b/net/tls/tls_main.c @@ -290,11 +290,8 @@ static void tls_sk_proto_close(struct so tls_sw_free_resources_tx(sk); } - if (ctx->rx_conf == TLS_SW) { - kfree(ctx->rx.rec_seq); - kfree(ctx->rx.iv); + if (ctx->rx_conf == TLS_SW) tls_sw_free_resources_rx(sk); - } #ifdef CONFIG_TLS_DEVICE if (ctx->rx_conf == TLS_HW) --- a/net/tls/tls_sw.c +++ b/net/tls/tls_sw.c @@ -1118,6 +1118,9 @@ void tls_sw_release_resources_rx(struct struct tls_context *tls_ctx = tls_get_ctx(sk); struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); + kfree(tls_ctx->rx.rec_seq); + kfree(tls_ctx->rx.iv); + if (ctx->aead_recv) { kfree_skb(ctx->recv_pkt); ctx->recv_pkt = NULL;