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net/ncsi: Ensure 32-bit boundary for data cksum

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The NCSI spec indicates that if the data does not end on a 32 bit
boundary, one to three padding bytes equal to 0x00 shall be present to
align the checksum field to a 32-bit boundary.

Signed-off-by: Terry S. Duncan <terry.s.duncan@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Terry S. Duncan 2019-08-19 17:24:02 -07:00 committed by David S. Miller
parent 4651d1802f
commit 96a1b033ac
2 changed files with 7 additions and 4 deletions
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2
net/ncsi/ncsi-cmd.c
View File

@ -54,7 +54,7 @@ static void ncsi_cmd_build_header(struct ncsi_pkt_hdr *h,
checksum = ncsi_calculate_checksum((unsigned char *)h,
sizeof(*h) + nca->payload);
pchecksum = (__be32 *)((void *)h + sizeof(struct ncsi_pkt_hdr) +
nca->payload);
ALIGN(nca->payload, 4));
*pchecksum = htonl(checksum);
}

9
net/ncsi/ncsi-rsp.c
View File

@ -47,7 +47,8 @@ static int ncsi_validate_rsp_pkt(struct ncsi_request *nr,
if (ntohs(h->code) != NCSI_PKT_RSP_C_COMPLETED ||
ntohs(h->reason) != NCSI_PKT_RSP_R_NO_ERROR) {
netdev_dbg(nr->ndp->ndev.dev,
"NCSI: non zero response/reason code\n");
"NCSI: non zero response/reason code %04xh, %04xh\n",
ntohs(h->code), ntohs(h->reason));
return -EPERM;
}
@ -55,7 +56,7 @@ static int ncsi_validate_rsp_pkt(struct ncsi_request *nr,
* sender doesn't support checksum according to NCSI
* specification.
*/
pchecksum = (__be32 *)((void *)(h + 1) + payload - 4);
pchecksum = (__be32 *)((void *)(h + 1) + ALIGN(payload, 4) - 4);
if (ntohl(*pchecksum) == 0)
return 0;
@ -63,7 +64,9 @@ static int ncsi_validate_rsp_pkt(struct ncsi_request *nr,
sizeof(*h) + payload - 4);
if (*pchecksum != htonl(checksum)) {
netdev_dbg(nr->ndp->ndev.dev, "NCSI: checksum mismatched\n");
netdev_dbg(nr->ndp->ndev.dev,
"NCSI: checksum mismatched; recd: %08x calc: %08x\n",
*pchecksum, htonl(checksum));
return -EINVAL;
}