@@ -2111,6 +2111,11 @@ tap_mp_attach_queues(const char *port_name, struct rte_eth_dev *dev)
TAP_LOG(DEBUG, "Received IPC reply for %s", reply_param->port_name);
/* Attach the queues from received file descriptors */
+ if (reply_param->rxq_count + reply_param->txq_count != reply->num_fds) {
+ TAP_LOG(ERR, "Unexpected number of fds received");
+ return -1;
+ }
+
dev->data->nb_rx_queues = reply_param->rxq_count;
dev->data->nb_tx_queues = reply_param->txq_count;
fd_iterator = 0;
@@ -2151,19 +2156,24 @@ tap_mp_sync_queues(const struct rte_mp_msg *request, const void *peer)
/* Fill file descriptors for all queues */
reply.num_fds = 0;
reply_param->rxq_count = 0;
+ if (dev->data->nb_rx_queues + dev->data->nb_tx_queues >
+ RTE_MP_MAX_FD_NUM){
+ TAP_LOG(ERR, "Number of rx/tx queues exceeds max number of fds");
+ return -1;
+ }
+
for (queue = 0; queue < dev->data->nb_rx_queues; queue++) {
reply.fds[reply.num_fds++] = process_private->rxq_fds[queue];
reply_param->rxq_count++;
}
RTE_ASSERT(reply_param->rxq_count == dev->data->nb_rx_queues);
- RTE_ASSERT(reply_param->txq_count == dev->data->nb_tx_queues);
- RTE_ASSERT(reply.num_fds <= RTE_MP_MAX_FD_NUM);
reply_param->txq_count = 0;
for (queue = 0; queue < dev->data->nb_tx_queues; queue++) {
reply.fds[reply.num_fds++] = process_private->txq_fds[queue];
reply_param->txq_count++;
}
+ RTE_ASSERT(reply_param->txq_count == dev->data->nb_tx_queues);
/* Send reply */
strlcpy(reply.name, request->name, sizeof(reply.name));
When secondary to primary process synchronization occours there is no check for number of fds which could cause buffer overrun. Bugzilla ID: 252 Fixes: c9aa56edec8e ("net/tap: access primary process queues from secondary") Cc: rasland@mellanox.com Cc: stable@dpdk.org Signed-off-by: Herakliusz Lipiec <herakliusz.lipiec@intel.com> --- drivers/net/tap/rte_eth_tap.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-)