diff options
| -rw-r--r-- | drivers/net/ethernet/sfc/siena_sriov.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/net/ethernet/sfc/siena_sriov.c b/drivers/net/ethernet/sfc/siena_sriov.c index 5c6839ec3a8..80976e84eee 100644 --- a/drivers/net/ethernet/sfc/siena_sriov.c +++ b/drivers/net/ethernet/sfc/siena_sriov.c @@ -796,12 +796,13 @@ static int efx_vfdi_set_status_page(struct efx_vf *vf) { struct efx_nic *efx = vf->efx; struct vfdi_req *req = vf->buf.addr; - unsigned int page_count; + u64 page_count = req->u.set_status_page.peer_page_count; + u64 max_page_count = + (EFX_PAGE_SIZE - + offsetof(struct vfdi_req, u.set_status_page.peer_page_addr[0])) + / sizeof(req->u.set_status_page.peer_page_addr[0]); - page_count = req->u.set_status_page.peer_page_count; - if (!req->u.set_status_page.dma_addr || EFX_PAGE_SIZE < - offsetof(struct vfdi_req, - u.set_status_page.peer_page_addr[page_count])) { + if (!req->u.set_status_page.dma_addr || page_count > max_page_count) { if (net_ratelimit()) netif_err(efx, hw, efx->net_dev, "ERROR: Invalid SET_STATUS_PAGE from %s\n", |