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. Since the ethdev layer now
validates mtu <= max_mtu before calling the PMD, the data_size
bounds check in eth_dev_mtu_set() is converted to RTE_ASSERT().
v3:
- patch 3/3: convert redundant data_size bounds check in
eth_dev_mtu_set() to RTE_ASSERT() (reviewer feedback)
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 | 21 +++++++++++++++++----
1 file changed, 17 insertions(+), 4 deletions(-)
--
2.34.1
