This series fixes two bugs in the af_packet PMD related to frame size calculations and buffer safety, then enables jumbo frame support by deriving the advertised capabilities from the actual TPACKET ring configuration.
Patch 1 fixes the data size calculation in eth_dev_mtu_set() which is too restrictive due to TPACKET2_HDRLEN including sizeof(struct sockaddr_ll) even though the sockaddr_ll does not consume frame data space. The formula is now consistent with the RX and TX paths. Patch 2 adds a bounds check in the RX path to prevent a heap buffer overflow when the kernel delivers a packet larger than the mbuf data room (e.g. if the kernel interface MTU is raised externally). Patch 3 replaces the static max_rx_pktlen (RTE_ETHER_MAX_LEN) and adds max_mtu, both derived from the configured TPACKET frame size. This enables jumbo frame support when the user specifies a larger framesz devarg at vdev creation time. v2: - patch 2/3: fix Fixes tag to use 12-char SHA (checkpatch warning) Xavier Guillaume (3): net/af_packet: fix MTU set data size calculation net/af_packet: fix receive buffer overflow net/af_packet: support jumbo frames drivers/net/af_packet/rte_eth_af_packet.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) -- 2.34.1
