kernel-net-ppp: CVE-2015-8569dizzy-enea

Fixes an information leak from getsockname in the linux-yocto 3.14.

References:
===========
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8569
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2015-8569

Reference to the upstream fixes:
===============================
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/
patch/?id=0b21a04d1ff604297995fe4a21bde8ba7333d42c

Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
Signed-off-by: Tudor Florea <tudor.florea@enea.com>

2 files changed, 47 insertions, 0 deletions

diff --git a/recipes-kernel/linux/linux-yocto-3.14/net-ppp-CVE-2015-8569.patch b/recipes-kernel/linux/linux-yocto-3.14/net-ppp-CVE-2015-8569.patch
new file mode 100644
index 0000000..de58a87
--- /dev/null
+++ b/recipes-kernel/linux/linux-yocto-3.14/net-ppp-CVE-2015-8569.patch
@@ -0,0 +1,46 @@
+From 0b21a04d1ff604297995fe4a21bde8ba7333d42c Mon Sep 17 00:00:00 2001
+From: WANG Cong <xiyou.wangcong@gmail.com>
+Date: Mon, 14 Dec 2015 13:48:36 -0800
+Subject: pptp: verify sockaddr_len in pptp_bind() and pptp_connect()
+
+[ Upstream commit 09ccfd238e5a0e670d8178cf50180ea81ae09ae1 ]
+
+CVE: CVE-2015-8569
+Upstream-Status: Backport
+
+Reported-by: Dmitry Vyukov <dvyukov@gmail.com>
+Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
+---
+ drivers/net/ppp/pptp.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/drivers/net/ppp/pptp.c b/drivers/net/ppp/pptp.c
+index 1dc628f..0710214 100644
+--- a/drivers/net/ppp/pptp.c
++++ b/drivers/net/ppp/pptp.c
+@@ -420,6 +420,9 @@ static int pptp_bind(struct socket *sock, struct sockaddr *uservaddr,
+        struct pptp_opt *opt = &po->proto.pptp;
+        int error = 0;
+ 
++       if (sockaddr_len < sizeof(struct sockaddr_pppox))
++               return -EINVAL;
++
+        lock_sock(sk);
+ 
+        opt->src_addr = sp->sa_addr.pptp;
+@@ -441,6 +444,9 @@ static int pptp_connect(struct socket *sock, struct sockaddr *uservaddr,
+        struct flowi4 fl4;
+        int error = 0;
+ 
++       if (sockaddr_len < sizeof(struct sockaddr_pppox))
++               return -EINVAL;
++
+        if (sp->sa_protocol != PX_PROTO_PPTP)
+                return -EINVAL;
+ 
+-- 
+cgit v0.12
+
diff --git a/recipes-kernel/linux/linux-yocto_3.14.bbappend b/recipes-kernel/linux/linux-yocto_3.14.bbappend
index bc3a24f..50bce16 100644
--- a/recipes-kernel/linux/linux-yocto_3.14.bbappend
+++ b/recipes-kernel/linux/linux-yocto_3.14.bbappend
@@ -28,4 +28,5 @@ SRC_URI += "file://HID_CVE_patches/0005-HID-steelseries-validate-output-report-d
             file://net-unix-CVE-2013-7446.patch \
             file://ALSA-CVE-2016-2546.patch \
             file://ALSA-CVE-2016-2384.patch \
+            file://net-ppp-CVE-2015-8569.patch \
            "