File 0339-9pfs-factor-out-virtio_pdu_-un-mars.patch of Package qemu.8405

From 54a77728fc5fb11287167b10cda4eaa0e8113837 Mon Sep 17 00:00:00 2001
From: Wei Liu <wei.liu2@citrix.com>
Date: Thu, 3 Dec 2015 12:40:28 +0000
Subject: [PATCH] 9pfs: factor out virtio_pdu_{,un}marshal

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
(cherry picked from commit fe9fa96d7c83efc1457bd6a5b07aab7550c6d197)
[BR: Fix and/or infrastructure for BSC#1020427 CVE-2016-9602]
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
 hw/9pfs/virtio-9p-device.c | 14 ++++++++++++++
 hw/9pfs/virtio-9p.c        |  6 ++----
 hw/9pfs/virtio-9p.h        |  5 +++++
 3 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/hw/9pfs/virtio-9p-device.c b/hw/9pfs/virtio-9p-device.c
index 737331ed3f..c2ada21957 100644
--- a/hw/9pfs/virtio-9p-device.c
+++ b/hw/9pfs/virtio-9p-device.c
@@ -159,6 +159,20 @@ static void virtio_9p_device_unrealize(DeviceState *dev, Error **errp)
     g_free(s->tag);
 }
 
+ssize_t virtio_pdu_vmarshal(V9fsPDU *pdu, size_t offset,
+                            const char *fmt, va_list ap)
+{
+    return v9fs_iov_vmarshal(pdu->elem.in_sg, pdu->elem.in_num,
+                             offset, 1, fmt, ap);
+}
+
+ssize_t virtio_pdu_vunmarshal(V9fsPDU *pdu, size_t offset,
+                              const char *fmt, va_list ap)
+{
+    return v9fs_iov_vunmarshal(pdu->elem.out_sg, pdu->elem.out_num,
+                               offset, 1, fmt, ap);
+}
+
 /* virtio-9p device */
 
 static Property virtio_9p_properties[] = {
diff --git a/hw/9pfs/virtio-9p.c b/hw/9pfs/virtio-9p.c
index bbbe1ceaea..df090dc98b 100644
--- a/hw/9pfs/virtio-9p.c
+++ b/hw/9pfs/virtio-9p.c
@@ -43,8 +43,7 @@ ssize_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...)
     va_list ap;
 
     va_start(ap, fmt);
-    ret = v9fs_iov_vmarshal(pdu->elem.in_sg, pdu->elem.in_num,
-                            offset, 1, fmt, ap);
+    ret = virtio_pdu_vmarshal(pdu, offset, fmt, ap);
     va_end(ap);
 
     return ret;
@@ -56,8 +55,7 @@ ssize_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...)
     va_list ap;
 
     va_start(ap, fmt);
-    ret = v9fs_iov_vunmarshal(pdu->elem.out_sg, pdu->elem.out_num,
-                              offset, 1, fmt, ap);
+    ret = virtio_pdu_vunmarshal(pdu, offset, fmt, ap);
     va_end(ap);
 
     return ret;
diff --git a/hw/9pfs/virtio-9p.h b/hw/9pfs/virtio-9p.h
index d6f3ac08a7..e298949fde 100644
--- a/hw/9pfs/virtio-9p.h
+++ b/hw/9pfs/virtio-9p.h
@@ -323,6 +323,11 @@ extern int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath,
 ssize_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...);
 ssize_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...);
 
+ssize_t virtio_pdu_vmarshal(V9fsPDU *pdu, size_t offset,
+                            const char *fmt, va_list ap);
+ssize_t virtio_pdu_vunmarshal(V9fsPDU *pdu, size_t offset,
+                              const char *fmt, va_list ap);
+
 #define TYPE_VIRTIO_9P "virtio-9p-device"
 #define VIRTIO_9P(obj) \
         OBJECT_CHECK(V9fsState, (obj), TYPE_VIRTIO_9P)