[dpdk-stable] [PATCH 3/3] vhost: fix null pointer checking
Mohammad Abdul Awal
mohammad.abdul.awal at intel.com
Wed Apr 3 18:08:23 CEST 2019
Null value for parameters will cause segfault.
Fuxes: d7280c9fff ("vhost: support selective datapath")
Fixes: 72e8543093 ("vhost: add external message handling to the API")
Fixes: a277c71598 ("vhost: refactor code structure")
Fixes: ca33faf9ef ("vhost: introduce API to fetch negotiated features")
Fixes: eb32247457 ("vhost: export guest memory regions")
Fixes: 40ef286f23 ("vhost: export vhost vring info")
Fixes: bd2e0c3fe5 ("vhost: add APIs for live migration")
Fixes: 0b8572a0c1 ("vhost: add external message handling to the API")
Cc: stable at dpdk.org
Signed-off-by: Mohammad Abdul Awal <mohammad.abdul.awal at intel.com>
---
lib/librte_vhost/vdpa.c | 5 ++++-
lib/librte_vhost/vhost.c | 16 ++++++++--------
2 files changed, 12 insertions(+), 9 deletions(-)
diff --git a/lib/librte_vhost/vdpa.c b/lib/librte_vhost/vdpa.c
index 321e11f17..814082479 100644
--- a/lib/librte_vhost/vdpa.c
+++ b/lib/librte_vhost/vdpa.c
@@ -49,7 +49,7 @@ rte_vdpa_register_device(struct rte_vdpa_dev_addr *addr,
char device_name[MAX_VDPA_NAME_LEN];
int i;
- if (vdpa_device_num >= MAX_VHOST_DEVICE)
+ if (vdpa_device_num >= MAX_VHOST_DEVICE || !addr || !ops)
return -1;
for (i = 0; i < MAX_VHOST_DEVICE; i++) {
@@ -99,6 +99,9 @@ rte_vdpa_find_device_id(struct rte_vdpa_dev_addr *addr)
struct rte_vdpa_device *dev;
int i;
+ if (!addr)
+ return -1;
+
for (i = 0; i < MAX_VHOST_DEVICE; ++i) {
dev = vdpa_devices[i];
if (dev && is_same_vdpa_device(&dev->addr, addr))
diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
index e480aeac9..27fe87188 100644
--- a/lib/librte_vhost/vhost.c
+++ b/lib/librte_vhost/vhost.c
@@ -447,7 +447,7 @@ rte_vhost_get_mtu(int vid, uint16_t *mtu)
{
struct virtio_net *dev = get_device(vid);
- if (!dev)
+ if (!dev || !mtu)
return -ENODEV;
if (!(dev->flags & VIRTIO_DEV_READY))
@@ -515,7 +515,7 @@ rte_vhost_get_ifname(int vid, char *buf, size_t len)
{
struct virtio_net *dev = get_device(vid);
- if (dev == NULL)
+ if (dev == NULL || !buf)
return -1;
len = RTE_MIN(len, sizeof(dev->ifname));
@@ -532,7 +532,7 @@ rte_vhost_get_negotiated_features(int vid, uint64_t *features)
struct virtio_net *dev;
dev = get_device(vid);
- if (!dev)
+ if (!dev || !features)
return -1;
*features = dev->features;
@@ -547,7 +547,7 @@ rte_vhost_get_mem_table(int vid, struct rte_vhost_memory **mem)
size_t size;
dev = get_device(vid);
- if (!dev)
+ if (!dev || !mem)
return -1;
size = dev->mem->nregions * sizeof(struct rte_vhost_mem_region);
@@ -570,7 +570,7 @@ rte_vhost_get_vhost_vring(int vid, uint16_t vring_idx,
struct vhost_virtqueue *vq;
dev = get_device(vid);
- if (!dev)
+ if (!dev || !vring)
return -1;
if (vring_idx >= VHOST_MAX_VRING)
@@ -763,7 +763,7 @@ int rte_vhost_get_log_base(int vid, uint64_t *log_base,
{
struct virtio_net *dev = get_device(vid);
- if (!dev)
+ if (!dev || !log_base || !log_size)
return -1;
*log_base = dev->log_base;
@@ -777,7 +777,7 @@ int rte_vhost_get_vring_base(int vid, uint16_t queue_id,
{
struct virtio_net *dev = get_device(vid);
- if (!dev)
+ if (!dev || !last_avail_idx || !last_used_idx)
return -1;
*last_avail_idx = dev->virtqueue[queue_id]->last_avail_idx;
@@ -805,7 +805,7 @@ int rte_vhost_extern_callback_register(int vid,
{
struct virtio_net *dev = get_device(vid);
- if (!dev)
+ if (!dev || !ops)
return -1;
dev->extern_ops = *ops;
--
2.17.1
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