[dpdk-stable] [dpdk-dev] [PATCH 1/3] ethdev: fix null pointer checking

[Stephen Hemminger]

On Wed,  3 Apr 2019 17:07:26 +0100
Mohammad Abdul Awal <mohammad.abdul.awal at intel.com> wrote:

> Null value for parameter name will cause segfault for the
> strnlen and strcmp functions.
> 
> Fixes: 0b33b68d12 ("ethdev: export allocate function")
> Fixes: 942661004c ("ethdev: export secondary attach function")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Mohammad Abdul Awal <mohammad.abdul.awal at intel.com>
> ---
>  lib/librte_ethdev/rte_ethdev.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
> index 10bdfb37e..26898ed08 100644
> --- a/lib/librte_ethdev/rte_ethdev.c
> +++ b/lib/librte_ethdev/rte_ethdev.c
> @@ -440,6 +440,11 @@ rte_eth_dev_allocate(const char *name)
>  	struct rte_eth_dev *eth_dev = NULL;
>  	size_t name_len;
>  
> +	if (name == NULL) {
> +		RTE_ETHDEV_LOG(ERR, "Null pointer is specified\n");
> +		return NULL;
> +	}
> +

Ok, but I doubt that a driver that is so buggy that it passes NULL
that it will do any proper error handling on return of NULL.
Would rather just see the application crash hard immediately.