Could this cause OOB bug ?

In function megasas_handle_scsi(hw/scsi/megasas.c):

```c
static int megasas_handle_scsi(MegasasState *s, MegasasCmd *cmd,
                               int frame_cmd)
{
    ............................................................................
    cdb = cmd->frame->pass.cdb;
    target_id = cmd->frame->header.target_id;
    lun_id = cmd->frame->header.lun_id;
    cdb_len = cmd->frame->header.cdb_len;
    ............................................................................
    if (cdb_len > 16) {
        trace_megasas_scsi_invalid_cdb_len(
                mfi_frame_desc[frame_cmd], is_logical,
                target_id, lun_id, cdb_len);
        megasas_write_sense(cmd, SENSE_CODE(INVALID_OPCODE));
        cmd->frame->header.scsi_status = CHECK_CONDITION;
        s->event_count++;
        return MFI_STAT_SCSI_DONE_WITH_ERROR;
    }
}
```

Two variables, frame_cmd and cdb_len, can be controlled by guest os. So can mfi_frame_desc[frame_cmd] cause OOB bug ?

QEMU emulator version 5.0.50 (v5.0.0-533-gdebe78ce14-dirty)

You must start the trace function of QEMU to trigger this BUG!

I think we should fix this anyway, even if it can only be triggered when trace functions are enabled

Fix has been included:
https://git.qemu.org/?p=qemu.git;a=commitdiff;h=ee760ac80ac1f1