scsi: mpt3sas: Fix buffer overflow in mpt3sas_send_mctp_passthru_req()

The "sz" argument in mpt3sas_check_cmd_timeout() is the number of u32, not
the number of bytes.  We dump that many u32 values to dmesg.  Passing the
number of bytes will lead to a read overflow.  Divide by 4 to get the
correct value.

Fixes: c72be4b ("scsi: mpt3sas: Add support for MCTP Passthrough commands")
Signed-off-by: Dan Carpenter <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Martin K. Petersen <[email protected]>

Author: Dan Carpenter

drivers/scsi/mpt3sas/mpt3sas_ctl.c

@@ -3017,7 +3017,7 @@ int mpt3sas_send_mctp_passthru_req(struct mpt3_passthru_command *command)
 	if (!(ioc->ctl_cmds.status & MPT3_CMD_COMPLETE)) {
 		mpt3sas_check_cmd_timeout(ioc,
 		    ioc->ctl_cmds.status, mpi_request,
-		    sizeof(Mpi26MctpPassthroughRequest_t), issue_reset);
+		    sizeof(Mpi26MctpPassthroughRequest_t) / 4, issue_reset);
 		goto issue_host_reset;
 	}