|
 |
c7ffa4 |
From 1fd1b4807bdabc32953e2591e06ac9331edee76e Mon Sep 17 00:00:00 2001
|
|
|
c7ffa4 |
From: Maxime Coquelin <maxime.coquelin@redhat.com>
|
|
|
c7ffa4 |
Date: Mon, 23 Apr 2018 11:33:40 +0200
|
|
|
c7ffa4 |
Subject: [PATCH 03/11] vhost: introduce safe API for GPA translation
|
|
|
c7ffa4 |
|
|
|
c7ffa4 |
This new rte_vhost_va_from_guest_pa API takes an extra len
|
|
|
c7ffa4 |
parameter, used to specify the size of the range to be mapped.
|
|
|
c7ffa4 |
Effective mapped range is returned via len parameter.
|
|
|
c7ffa4 |
|
|
|
c7ffa4 |
This issue has been assigned CVE-2018-1059.
|
|
|
c7ffa4 |
|
|
|
c7ffa4 |
Reported-by: Yongji Xie <xieyongji@baidu.com>
|
|
|
c7ffa4 |
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
|
|
|
c7ffa4 |
---
|
|
|
c7ffa4 |
lib/librte_vhost/rte_vhost.h | 40 ++++++++++++++++++++++++++++++++++
|
|
|
c7ffa4 |
lib/librte_vhost/rte_vhost_version.map | 6 +++++
|
|
|
c7ffa4 |
lib/librte_vhost/vhost.h | 2 +-
|
|
|
c7ffa4 |
3 files changed, 47 insertions(+), 1 deletion(-)
|
|
|
c7ffa4 |
|
|
|
c7ffa4 |
diff --git a/lib/librte_vhost/rte_vhost.h b/lib/librte_vhost/rte_vhost.h
|
|
|
c7ffa4 |
index f653644..f2d6c95 100644
|
|
|
c7ffa4 |
--- a/lib/librte_vhost/rte_vhost.h
|
|
|
c7ffa4 |
+++ b/lib/librte_vhost/rte_vhost.h
|
|
|
c7ffa4 |
@@ -143,4 +143,44 @@ struct vhost_device_ops {
|
|
|
c7ffa4 |
}
|
|
|
c7ffa4 |
|
|
|
c7ffa4 |
+/**
|
|
|
c7ffa4 |
+ * Convert guest physical address to host virtual address safely
|
|
|
c7ffa4 |
+ *
|
|
|
c7ffa4 |
+ * This variant of rte_vhost_gpa_to_vva() takes care all the
|
|
|
c7ffa4 |
+ * requested length is mapped and contiguous in process address
|
|
|
c7ffa4 |
+ * space.
|
|
|
c7ffa4 |
+ *
|
|
|
c7ffa4 |
+ * @param mem
|
|
|
c7ffa4 |
+ * the guest memory regions
|
|
|
c7ffa4 |
+ * @param gpa
|
|
|
c7ffa4 |
+ * the guest physical address for querying
|
|
|
c7ffa4 |
+ * @param len
|
|
|
c7ffa4 |
+ * the size of the requested area to map, updated with actual size mapped
|
|
|
c7ffa4 |
+ * @return
|
|
|
c7ffa4 |
+ * the host virtual address on success, 0 on failure
|
|
|
c7ffa4 |
+ */
|
|
|
c7ffa4 |
+static __rte_always_inline uint64_t
|
|
|
c7ffa4 |
+rte_vhost_va_from_guest_pa(struct rte_vhost_memory *mem,
|
|
|
c7ffa4 |
+ uint64_t gpa, uint64_t *len)
|
|
|
c7ffa4 |
+{
|
|
|
c7ffa4 |
+ struct rte_vhost_mem_region *r;
|
|
|
c7ffa4 |
+ uint32_t i;
|
|
|
c7ffa4 |
+
|
|
|
c7ffa4 |
+ for (i = 0; i < mem->nregions; i++) {
|
|
|
c7ffa4 |
+ r = &mem->regions[i];
|
|
|
c7ffa4 |
+ if (gpa >= r->guest_phys_addr &&
|
|
|
c7ffa4 |
+ gpa < r->guest_phys_addr + r->size) {
|
|
|
c7ffa4 |
+
|
|
|
c7ffa4 |
+ if (unlikely(*len > r->guest_phys_addr + r->size - gpa))
|
|
|
c7ffa4 |
+ *len = r->guest_phys_addr + r->size - gpa;
|
|
|
c7ffa4 |
+
|
|
|
c7ffa4 |
+ return gpa - r->guest_phys_addr +
|
|
|
c7ffa4 |
+ r->host_user_addr;
|
|
|
c7ffa4 |
+ }
|
|
|
c7ffa4 |
+ }
|
|
|
c7ffa4 |
+ *len = 0;
|
|
|
c7ffa4 |
+
|
|
|
c7ffa4 |
+ return 0;
|
|
|
c7ffa4 |
+}
|
|
|
c7ffa4 |
+
|
|
|
c7ffa4 |
#define RTE_VHOST_NEED_LOG(features) ((features) & (1ULL << VHOST_F_LOG_ALL))
|
|
|
c7ffa4 |
|
|
|
c7ffa4 |
diff --git a/lib/librte_vhost/rte_vhost_version.map b/lib/librte_vhost/rte_vhost_version.map
|
|
|
c7ffa4 |
index 1e70495..9cb1d8c 100644
|
|
|
c7ffa4 |
--- a/lib/librte_vhost/rte_vhost_version.map
|
|
|
c7ffa4 |
+++ b/lib/librte_vhost/rte_vhost_version.map
|
|
|
c7ffa4 |
@@ -53,2 +53,8 @@ DPDK_17.08 {
|
|
|
c7ffa4 |
|
|
|
c7ffa4 |
} DPDK_17.05;
|
|
|
c7ffa4 |
+
|
|
|
c7ffa4 |
+DPDK_17.11.2 {
|
|
|
c7ffa4 |
+ global;
|
|
|
c7ffa4 |
+
|
|
|
c7ffa4 |
+ rte_vhost_va_from_guest_pa;
|
|
|
c7ffa4 |
+} DPDK_17.08;
|
|
|
c7ffa4 |
diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
|
|
|
c7ffa4 |
index de300c1..16d6b89 100644
|
|
|
c7ffa4 |
--- a/lib/librte_vhost/vhost.h
|
|
|
c7ffa4 |
+++ b/lib/librte_vhost/vhost.h
|
|
|
c7ffa4 |
@@ -391,5 +391,5 @@ uint64_t __vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
|
|
|
c7ffa4 |
{
|
|
|
c7ffa4 |
if (!(dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)))
|
|
|
c7ffa4 |
- return rte_vhost_gpa_to_vva(dev->mem, iova);
|
|
|
c7ffa4 |
+ return rte_vhost_va_from_guest_pa(dev->mem, iova, len);
|
|
|
c7ffa4 |
|
|
|
c7ffa4 |
return __vhost_iova_to_vva(dev, vq, iova, len, perm);
|
|
|
c7ffa4 |
--
|
|
|
c7ffa4 |
1.8.3.1
|
|
|
c7ffa4 |
|