Add support for patched kernels and publish the source that was built

Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au>

config/kernel-config

@@ -1,6 +1,6 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/x86 4.9.8 Kernel Configuration
+# Linux/x86 4.9.12 Kernel Configuration
 #
 CONFIG_64BIT=y
 CONFIG_X86_64=y

patches/CVE-2017-6074.patch

@@ -0,0 +1,47 @@
+From 5edabca9d4cff7f1f2b68f0bac55ef99d9798ba4 Mon Sep 17 00:00:00 2001
+From: Andrey Konovalov <andreyknvl@google.com>
+Date: Thu, 16 Feb 2017 17:22:46 +0100
+Subject: dccp: fix freeing skb too early for IPV6_RECVPKTINFO
+
+In the current DCCP implementation an skb for a DCCP_PKT_REQUEST packet
+is forcibly freed via __kfree_skb in dccp_rcv_state_process if
+dccp_v6_conn_request successfully returns.
+
+However, if IPV6_RECVPKTINFO is set on a socket, the address of the skb
+is saved to ireq->pktopts and the ref count for skb is incremented in
+dccp_v6_conn_request, so skb is still in use. Nevertheless, it gets freed
+in dccp_rcv_state_process.
+
+Fix by calling consume_skb instead of doing goto discard and therefore
+calling __kfree_skb.
+
+Similar fixes for TCP:
+
+fb7e2399ec17f1004c0e0ccfd17439f8759ede01 [TCP]: skb is unexpectedly freed.
+0aea76d35c9651d55bbaf746e7914e5f9ae5a25d tcp: SYN packets are now
+simply consumed
+
+Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
+Acked-by: Eric Dumazet <edumazet@google.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ net/dccp/input.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/net/dccp/input.c b/net/dccp/input.c
+index ba34718..8fedc2d 100644
+--- a/net/dccp/input.c
++++ b/net/dccp/input.c
+@@ -606,7 +606,8 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
+ 			if (inet_csk(sk)->icsk_af_ops->conn_request(sk,
+ 								    skb) < 0)
+ 				return 1;
+-			goto discard;
++			consume_skb(skb);
++			return 0;
+ 		}
+ 		if (dh->dccph_type == DCCP_PKT_RESET)
+ 			goto discard;
+-- 
+cgit v0.12
+

scripts/build-common

@@ -11,6 +11,10 @@ fi
 : ${BUILD:=/usr/src}
 : ${CONFIG:=$(pwd)/config}
 : ${DIST:=$(pwd)/dist}
+: ${PATCHES:=$(pwd)/patches}
+
+mkdir -p ${DIST}/kernel
+
 
 list_build_files() {
     find . -name Makefile\* -o -name Kconfig\* -o -name \*.pl

scripts/extract

@@ -23,3 +23,9 @@ if [ ! -e ${DIR} ]; then
 fi
 
 cp ${CONFIG}/kernel-config ${DIR}/.config
+
+pushd .
+cd ${DIR}
+patch -p1 < ${PATCHES}/*
+popd
+

scripts/package-kernel

@@ -42,8 +42,6 @@ else
 
     create_firmware_tar $FIRMWARE
 
-    mkdir -p ${DIST}/kernel
-
     FILE="linux-${KVER}-x86.tar"
 
     (

scripts/release

@@ -7,6 +7,7 @@ mv build.log dist/
 
 echo
 echo "--- ${KERNEL_VERSION} Kernel prepared for RancherOS"
+echo "	./dist/kernel/linux-${KERNEL_VERSION}-src.tgz"
 echo "	./dist/kernel/extra-linux-${KERNEL_VERSION}-x86.tar.gz"
 echo "	./dist/kernel/build-linux-${KERNEL_VERSION}-x86.tar.gz"
 echo "	./dist/kernel/linux-${KERNEL_VERSION}-x86.tar.gz"
@@ -20,6 +21,7 @@ echo "to publish kernel files and container images, run dist/publish.sh"
 
 echo "#!/bin/sh"> dist/publish.sh
 echo "github-release release --user rancher --repo os-kernel --tag v${KERNEL_VERSION} --pre-release" >> dist/publish.sh
+echo "github-release upload  --user rancher --repo os-kernel --tag v${KERNEL_VERSION} --file ./dist/kernel/linux-${KERNEL_VERSION}-src.tgz --name linux-${KERNEL_VERSION}-src.tgz" >> dist/publish.sh
 echo "github-release upload  --user rancher --repo os-kernel --tag v${KERNEL_VERSION} --file ./dist/kernel/build-linux-${KERNEL_VERSION}-x86.tar.gz --name build-linux-${KERNEL_VERSION}-x86.tar.gz" >> dist/publish.sh
 echo "github-release upload  --user rancher --repo os-kernel --tag v${KERNEL_VERSION} --file ./dist/kernel/config --name config" >> dist/publish.sh
 echo "github-release upload  --user rancher --repo os-kernel --tag v${KERNEL_VERSION} --file ./dist/kernel/extra-linux-${KERNEL_VERSION}-x86.tar.gz --name extra-linux-${KERNEL_VERSION}-x86.tar.gz" >> dist/publish.sh