[dpdk-dev] [PATCH] vhost: fix unintended sign extension in async packed ring

[Cheng Jiang]

Change the variable type in store_dma_desc_info_packed() to fix
suspicious implicit sign extension.

Coverity issue: 370608, 370610, 370612
Fixes: 873e8dad6f49 (vhost: support packed ring in async datapath)

Signed-off-by: Cheng Jiang <cheng1.ji...@intel.com>
---
 lib/vhost/virtio_net.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/vhost/virtio_net.c b/lib/vhost/virtio_net.c
index 9137a9923b..abfd67d38c 100644
--- a/lib/vhost/virtio_net.c
+++ b/lib/vhost/virtio_net.c
@@ -1491,7 +1491,7 @@ store_dma_desc_info_packed(struct vring_used_elem_packed 
*s_ring,
                struct vring_used_elem_packed *d_ring,
                uint16_t ring_size, uint16_t s_idx, uint16_t d_idx, uint16_t 
count)
 {
-       uint16_t elem_size = sizeof(struct vring_used_elem_packed);
+       size_t elem_size = sizeof(struct vring_used_elem_packed);
 
        if (d_idx + count <= ring_size) {
                rte_memcpy(d_ring + d_idx, s_ring + s_idx, count * elem_size);
-- 
2.29.2