Re: [PATCH v3 15/18] hw/block/nvme: reject invalid nsid values in active namespace id list

[Dmitry Fomichev]

Looks good,

Reviewed-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>

On Mon, 2020-07-06 at 08:13 +0200, Klaus Jensen wrote:
> From: Klaus Jensen <k.jensen@samsung.com>
> 
> Reject the nsid broadcast value (0xffffffff) and 0xfffffffe in the
> Active Namespace ID list.
> 
> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
> ---
>  hw/block/nvme.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/hw/block/nvme.c b/hw/block/nvme.c
> index fc58f3d76530..af39126cd8d1 100644
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -992,6 +992,16 @@ static uint16_t nvme_identify_nslist(NvmeCtrl *n, 
> NvmeIdentify *c)
>  
>      trace_pci_nvme_identify_nslist(min_nsid);
>  
> +    /*
> +     * Both 0xffffffff (NVME_NSID_BROADCAST) and 0xfffffffe are invalid 
> values
> +     * since the Active Namespace ID List should return namespaces with ids
> +     * *higher* than the NSID specified in the command. This is also 
> specified
> +     * in the spec (NVM Express v1.3d, Section 5.15.4).
> +     */
> +    if (min_nsid >= NVME_NSID_BROADCAST - 1) {
> +        return NVME_INVALID_NSID | NVME_DNR;
> +    }
> +
>      list = g_malloc0(data_len);
>      for (i = 0; i < n->num_namespaces; i++) {
>          if (i < min_nsid) {