Re: [PATCH] hw/scsi/mptsas: Avoid silent integer truncation in MPI_FUNC_IOC_INIT

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

ping?

On 11/8/25 11:55, Philippe Mathieu-Daudé wrote:
> For the MaxDevices 8-bit field of the request / response structures
> of the MPI_FUNCTION_IOC_INIT command, the 0x00 value means "max 256
> devices". This is not a problem because when max_devices=256, its
> value (0x100), being casted to a uint8_t, is truncated to 0x00.
> However Coverity complains for an "Overflowed constant". Fix by
> re-using the request fields in the response, since they are not
> modified and use the same types.
> 
> Fix: Coverity 1547736 (Overflowed constant)
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   hw/scsi/mptsas.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/hw/scsi/mptsas.c b/hw/scsi/mptsas.c
> index 1ebe0b82a79..4ada35b7ec8 100644
> --- a/hw/scsi/mptsas.c
> +++ b/hw/scsi/mptsas.c
> @@ -579,11 +579,11 @@ static void mptsas_process_ioc_init(MPTSASState *s, MPIMsgIOCInit *req)
>       }
>   
>       memset(&reply, 0, sizeof(reply));
> -    reply.WhoInit    = s->who_init;
> +    reply.WhoInit    = req->WhoInit;
>       reply.MsgLength  = sizeof(reply) / 4;
>       reply.Function   = req->Function;
> -    reply.MaxDevices = s->max_devices;
> -    reply.MaxBuses   = s->max_buses;
> +    reply.MaxDevices = req->MaxDevices;
> +    reply.MaxBuses   = req->MaxBuses;
>       reply.MsgContext = req->MsgContext;
>   
>       mptsas_fix_ioc_init_reply_endianness(&reply);