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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,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 401BDC04AAF for ; Thu, 16 May 2019 11:49:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 129F720862 for ; Thu, 16 May 2019 11:49:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558007387; bh=3K/FjV1bSJVKX0ZHFJUpwhBItnqUc+nb/Ox3a5YrYR8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=UrHMHaSl3bL1Yq1nL5POGuCS9Gn+ktwijZr/W2Xw1qq7fi3e2qU+SKfl6mJTvjyDj hsbbu6n28Bzk1eQPxYArvixPRL2WqqoVThUCW7XJEZju4OfYwoHdP8ISV/xeZxfoiZ 6lRtseJQhWPii9kMYsh6fcWmW1no2T2NgXIKK9XY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728592AbfEPLtq (ORCPT ); Thu, 16 May 2019 07:49:46 -0400 Received: from mail.kernel.org ([198.145.29.99]:47660 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726537AbfEPLjg (ORCPT ); Thu, 16 May 2019 07:39:36 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B418F20848; Thu, 16 May 2019 11:39:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558006775; bh=3K/FjV1bSJVKX0ZHFJUpwhBItnqUc+nb/Ox3a5YrYR8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DNaDlDtkHJBmNZvkP40vB/eifLkXJxknsedY4tZ6qYnK25zT+drtxUcx3udVpMBUU CQDrdR7HhlXYuX080ySd1oiURulLtj+KV++vcUF00+PVnsfKxw/v7dCtnZi7jHCgig aXDR3/1oDzuj0kp22DGU4mK0/XgKNBxAFhzd4Mlo= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Myungho Jung , syzbot+b69368fd933c6c592f4c@syzkaller.appspotmail.com, Steffen Klassert , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.0 02/34] xfrm: Reset secpath in xfrm failure Date: Thu, 16 May 2019 07:38:59 -0400 Message-Id: <20190516113932.8348-2-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190516113932.8348-1-sashal@kernel.org> References: <20190516113932.8348-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Myungho Jung [ Upstream commit 6ed69184ed9c43873b8a1ee721e3bf3c08c2c6be ] In esp4_gro_receive() and esp6_gro_receive(), secpath can be allocated without adding xfrm state to xvec. Then, sp->xvec[sp->len - 1] would fail and result in dereferencing invalid pointer in esp4_gso_segment() and esp6_gso_segment(). Reset secpath if xfrm function returns error. Fixes: 7785bba299a8 ("esp: Add a software GRO codepath") Reported-by: syzbot+b69368fd933c6c592f4c@syzkaller.appspotmail.com Signed-off-by: Myungho Jung Signed-off-by: Steffen Klassert Signed-off-by: Sasha Levin --- net/ipv4/esp4_offload.c | 8 +++++--- net/ipv6/esp6_offload.c | 8 +++++--- 2 files changed, 10 insertions(+), 6 deletions(-) diff --git a/net/ipv4/esp4_offload.c b/net/ipv4/esp4_offload.c index 8756e0e790d2a..d3170a8001b2a 100644 --- a/net/ipv4/esp4_offload.c +++ b/net/ipv4/esp4_offload.c @@ -52,13 +52,13 @@ static struct sk_buff *esp4_gro_receive(struct list_head *head, goto out; if (sp->len == XFRM_MAX_DEPTH) - goto out; + goto out_reset; x = xfrm_state_lookup(dev_net(skb->dev), skb->mark, (xfrm_address_t *)&ip_hdr(skb)->daddr, spi, IPPROTO_ESP, AF_INET); if (!x) - goto out; + goto out_reset; sp->xvec[sp->len++] = x; sp->olen++; @@ -66,7 +66,7 @@ static struct sk_buff *esp4_gro_receive(struct list_head *head, xo = xfrm_offload(skb); if (!xo) { xfrm_state_put(x); - goto out; + goto out_reset; } } @@ -82,6 +82,8 @@ static struct sk_buff *esp4_gro_receive(struct list_head *head, xfrm_input(skb, IPPROTO_ESP, spi, -2); return ERR_PTR(-EINPROGRESS); +out_reset: + secpath_reset(skb); out: skb_push(skb, offset); NAPI_GRO_CB(skb)->same_flow = 0; diff --git a/net/ipv6/esp6_offload.c b/net/ipv6/esp6_offload.c index d46b4eb645c2e..cb99f6fb79b79 100644 --- a/net/ipv6/esp6_offload.c +++ b/net/ipv6/esp6_offload.c @@ -74,13 +74,13 @@ static struct sk_buff *esp6_gro_receive(struct list_head *head, goto out; if (sp->len == XFRM_MAX_DEPTH) - goto out; + goto out_reset; x = xfrm_state_lookup(dev_net(skb->dev), skb->mark, (xfrm_address_t *)&ipv6_hdr(skb)->daddr, spi, IPPROTO_ESP, AF_INET6); if (!x) - goto out; + goto out_reset; sp->xvec[sp->len++] = x; sp->olen++; @@ -88,7 +88,7 @@ static struct sk_buff *esp6_gro_receive(struct list_head *head, xo = xfrm_offload(skb); if (!xo) { xfrm_state_put(x); - goto out; + goto out_reset; } } @@ -109,6 +109,8 @@ static struct sk_buff *esp6_gro_receive(struct list_head *head, xfrm_input(skb, IPPROTO_ESP, spi, -2); return ERR_PTR(-EINPROGRESS); +out_reset: + secpath_reset(skb); out: skb_push(skb, offset); NAPI_GRO_CB(skb)->same_flow = 0; -- 2.20.1