On Fri, 6 Feb 2026 18:04:33 +0100 [email protected] wrote: > +static int > +nfb_eth_mtu_set(struct rte_eth_dev *dev, uint16_t mtu) > +{ > + unsigned int i; > + struct nc_rxmac_status status; > + struct pmd_internals *intl = dev->process_private; > + uint16_t frame_length_max_capable; > + > + mtu += RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN; > +
Since mtu is 16 bit value, you need to use uint32_t to avoid overflow. Something like: + uint32_t frame_len = (uint32_t)mtu + RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN; + if (frame_len > priv->frame_len_max_cap) + return -EINVAL; + for (i = 0; i < intl->max_rxmac; ++i) + nc_rxmac_set_frame_length(intl->rxmac[i], frame_len, RXMAC_FRAME_LENGTH_MAX);
