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Make sure packets generated by raw IP code is let through by mlx5en(4).

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Allow the TCP header to reside in the mbuf following the IP header.
Else such packets will get dropped.

Backtrace:
mlx5e_sq_xmit()
mlx5e_xmit()
ether_output_frame()
ether_output()
ip_output_send()
ip_output()
rip_output()
sosend_generic()
sosend()
kern_sendit()
sendit()
sys_sendto()
amd64_syscall()
fast_syscall_common()

MFC after:	1 week
Sponsored by:	Mellanox Technologies
This commit is contained in:
Hans Petter Selasky 2020-06-11 09:41:54 +00:00
parent b63b61cc75
commit 6fe9e470bb
1 changed files with 9 additions and 3 deletions
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12
sys/dev/mlx5/mlx5_en/mlx5_en_tx.c
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@ -307,9 +307,15 @@ mlx5e_get_full_header_size(const struct mbuf *mb, const struct tcphdr **ppth)
goto failure;
}
tcp_packet:
if (unlikely(mb->m_len < eth_hdr_len + sizeof(*th)))
goto failure;
th = (const struct tcphdr *)(mb->m_data + eth_hdr_len);
if (unlikely(mb->m_len < eth_hdr_len + sizeof(*th))) {
const struct mbuf *m_th = mb->m_next;
if (unlikely(mb->m_len != eth_hdr_len ||
m_th == NULL || m_th->m_len < sizeof(*th)))
goto failure;
th = (const struct tcphdr *)(m_th->m_data);
} else {
th = (const struct tcphdr *)(mb->m_data + eth_hdr_len);
}
tcp_hlen = th->th_off << 2;
eth_hdr_len += tcp_hlen;
udp_packet: