[dpdk-dev] [PATCH v2] lib/efd: fix to free tail queue entry after use
Maxime Coquelin
maxime.coquelin at redhat.com
Fri Nov 23 14:30:08 CET 2018
On 11/14/18 12:17 PM, Hari Kumar Vemula wrote:
> In rte_efd_create() allocated memory for tail queue entry but
> not freed.
> Added freeing the tail queue entry.
>
> Fixes: 56b6ef874f80 ("efd: new Elastic Flow Distributor library")
> Cc: stable at dpdk.org
>
> Signed-off-by: Hari Kumar Vemula <hari.kumarx.vemula at intel.com>
> Acked-by: Reshma Pattan <reshma.pattan at intel.com>
>
> ---
> v2: Updated commit message.
> ---
>
> lib/librte_efd/rte_efd.c | 21 +++++++++++++++++++++
> 1 file changed, 21 insertions(+)
>
> diff --git a/lib/librte_efd/rte_efd.c b/lib/librte_efd/rte_efd.c
> index a780e2fe8..f8c6c447f 100644
> --- a/lib/librte_efd/rte_efd.c
> +++ b/lib/librte_efd/rte_efd.c
> @@ -739,17 +739,38 @@ void
> rte_efd_free(struct rte_efd_table *table)
> {
> uint8_t socket_id;
> + struct rte_efd_list *efd_list = NULL;
NULL init seems useless here.
> + struct rte_tailq_entry *te;
>
> if (table == NULL)
> return;
>
> + efd_list = RTE_TAILQ_CAST(rte_efd_tailq.head, rte_efd_list);
> +
> for (socket_id = 0; socket_id < RTE_MAX_NUMA_NODES; socket_id++)
> rte_free(table->chunks[socket_id]);
>
> + rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK);
> +
> + /* find our tailq entry */
> + TAILQ_FOREACH(te, efd_list, next) {
> + if (te->data == (void *) table)
> + break;
> + }
> +
> + if (te == NULL) {
> + rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
> + return;
> + }
> +
> + TAILQ_REMOVE(efd_list, te, next);
> + rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
Wouldn't this be simpler by using TAILQ_FOREACH_SAFE() instead?
The element could removed from the list and freed within the loop.
> +
> rte_ring_free(table->free_slots);
> rte_free(table->offline_chunks);
> rte_free(table->keys);
> rte_free(table);
> + rte_free(te);
> }
>
> /**
>
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