[dpdk-dev] [PATCH] vhost: fix unintended sign extension in async packed ring
Cheng Jiang
cheng1.jiang at intel.com
Wed May 12 04:30:56 CEST 2021
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.jiang at 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
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