diff options
| -rw-r--r-- | drivers/infiniband/sw/siw/siw_qp_rx.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/infiniband/sw/siw/siw_qp_rx.c b/drivers/infiniband/sw/siw/siw_qp_rx.c index e8a88b378d51..34d03584160c 100644 --- a/drivers/infiniband/sw/siw/siw_qp_rx.c +++ b/drivers/infiniband/sw/siw/siw_qp_rx.c @@ -1082,6 +1082,21 @@ static int siw_get_hdr(struct siw_rx_stream *srx) } /* + * Peer-controlled mpa_len must not underflow srx->fpdu_part_rem + * in siw_tcp_rx_data(); a negative value flows as a signed copy + * length into siw_check_mem() and skb_copy_bits(). + */ + if (unlikely(be16_to_cpu(c_hdr->mpa_len) + MPA_HDR_SIZE < + iwarp_pktinfo[opcode].hdr_len)) { + pr_warn_ratelimited("siw: short mpa_len %u for opcode %u (hdr_len %u)\n", + be16_to_cpu(c_hdr->mpa_len), opcode, + iwarp_pktinfo[opcode].hdr_len); + siw_init_terminate(rx_qp(srx), TERM_ERROR_LAYER_LLP, + LLP_ETYPE_MPA, LLP_ECODE_FPDU_START, 0); + return -EINVAL; + } + + /* * DDP/RDMAP header receive completed. Check if the current * DDP segment starts a new RDMAP message or continues a previously * started RDMAP message. |