[dpdk-dev] [PATCH] sched: fix segmentation fault when freeing port

[Dumitrescu, Cristian]

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Jan Blunck
> Sent: Monday, February 6, 2017 5:33 PM
> To: dev at dpdk.org
> Cc: h.mikita89 at gmail.com; Alan Dewar <adewar at brocade.com>
> Subject: [dpdk-dev] [PATCH] sched: fix segmentation fault when freeing port
> 
> From: Alan Dewar <adewar at brocade.com>
> 
> Prevent a segmentation fault in rte_sched_port_free by only accessing
> the port structure after the NULL pointer check has been made.
> 
> Fixes: 7b3c4f35 ("sched: fix releasing enqueued packets")
> 
> Signed-off-by: Alan Dewar <adewar at brocade.com>
> Signed-off-by: Jan Blunck <jblunck at infradead.org>
> ---
>  lib/librte_sched/rte_sched.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/lib/librte_sched/rte_sched.c b/lib/librte_sched/rte_sched.c
> index e6dace2..614705d 100644
> --- a/lib/librte_sched/rte_sched.c
> +++ b/lib/librte_sched/rte_sched.c
> @@ -735,12 +735,14 @@ void
>  rte_sched_port_free(struct rte_sched_port *port)
>  {
>  	uint32_t qindex;
> -	uint32_t n_queues_per_port =
> rte_sched_port_queues_per_port(port);
> +	uint32_t n_queues_per_port;
> 
>  	/* Check user parameters */
>  	if (port == NULL)
>  		return;
> 
> +	n_queues_per_port = rte_sched_port_queues_per_port(port);
> +
>  	/* Free enqueued mbufs */
>  	for (qindex = 0; qindex < n_queues_per_port; qindex++) {
>  		struct rte_mbuf **mbufs = rte_sched_port_qbase(port,
> qindex);
> --
> 2.7.4

Acked-by: Cristian Dumitrescu <cristian.dumitrescu at intel.com>