Re: [PATCH blktests] nvme/070: add a test for Identify CNS 07h NULL pointer dereference

On 7/31/26 8:56 AM, Guixin Liu wrote:
> +test() {
> +	echo "Running ${TEST_NAME}"
> +
> +	_setup_nvmet
> +
> +	_nvmet_target_setup
> +
> +	_nvme_connect_subsys
> +
> +	local nvmedev
> +	nvmedev=$(_find_nvme_dev "${def_subsysnqn}")
> +
> +	# CNS 07h == Active Namespace ID list for the specified I/O Command Set.
> +	# CDW10 bits[7:0] hold the CNS; CDW11 bits[31:24] hold the CSI (0 == NVM).
> +	# Request from NSID 0 so the enabled namespace (NSID 1) is listed, which
> +	# is exactly the condition that used to dereference the NULL req->ns.
> +	if ! nvme admin-passthru "/dev/${nvmedev}" --opcode=0x06 \
> +		--namespace-id=0 --cdw10=0x07 --cdw11=0 --data-len=4096 -r \
> +		>> "${FULL}" 2>&1; then
> +		echo "Error: Identify CNS 07h failed"
> +	fi

The nvme admin-passthru ... works but why instead not use the existing
"nvme list-ns /dev/<nvmedev> --csi=0 ?

Thanks,
--Nilay