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-rw-r--r--meta/recipes-devtools/qemu/qemu/CVE-2015-7295_2.patch58
1 files changed, 58 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2015-7295_2.patch b/meta/recipes-devtools/qemu/qemu/CVE-2015-7295_2.patch
new file mode 100644
index 0000000000..74debf42a2
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2015-7295_2.patch
@@ -0,0 +1,58 @@
+From 29b9f5efd78ae0f9cc02dd169b6e80d2c404bade Mon Sep 17 00:00:00 2001
+From: Jason Wang <jasowang@redhat.com>
+Date: Fri, 25 Sep 2015 13:21:29 +0800
+Subject: [PATCH] virtio: introduce virtqueue_discard()
+
+This patch introduces virtqueue_discard() to discard a descriptor and
+unmap the sgs. This will be used by the patch that will discard
+descriptor when packet is truncated.
+
+Cc: Michael S. Tsirkin <mst@redhat.com>
+Signed-off-by: Jason Wang <jasowang@redhat.com>
+Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
+Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
+Upstream-Status: Backport
+
+git.qemu.org/?p=qemu.git;a=commit;h=29b9f5efd78ae0f9cc02dd169b6e80d2c404bade
+
+CVE: CVE-2015-7295 patch #2
+[Yocto # 9013]
+
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ hw/virtio/virtio.c | 7 +++++++
+ include/hw/virtio/virtio.h | 2 ++
+ 2 files changed, 9 insertions(+)
+
+Index: qemu-2.2.0/hw/virtio/virtio.c
+===================================================================
+--- qemu-2.2.0.orig/hw/virtio/virtio.c
++++ qemu-2.2.0/hw/virtio/virtio.c
+@@ -263,6 +263,13 @@ static void virtqueue_unmap_sg(VirtQueue
+ 0, elem->out_sg[i].iov_len);
+ }
+
++void virtqueue_discard(VirtQueue *vq, const VirtQueueElement *elem,
++ unsigned int len)
++{
++ vq->last_avail_idx--;
++ virtqueue_unmap_sg(vq, elem, len);
++}
++
+ void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem,
+ unsigned int len, unsigned int idx)
+ {
+Index: qemu-2.2.0/include/hw/virtio/virtio.h
+===================================================================
+--- qemu-2.2.0.orig/include/hw/virtio/virtio.h
++++ qemu-2.2.0/include/hw/virtio/virtio.h
+@@ -180,6 +180,8 @@ void virtio_del_queue(VirtIODevice *vdev
+ void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem,
+ unsigned int len);
+ void virtqueue_flush(VirtQueue *vq, unsigned int count);
++void virtqueue_discard(VirtQueue *vq, const VirtQueueElement *elem,
++ unsigned int len);
+ void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem,
+ unsigned int len, unsigned int idx);
+