[PATCH v3 02/17] net/dpaa2: fix Rx error queue memory leaks

Maxime Leroy
2026-03-06T13:31:00Z

The rx_err_vq is allocated separately with rte_zmalloc() in
dpaa2_alloc_rx_tx_queues(), but is never properly freed in two paths:

1. On port close: dpaa2_free_rx_tx_queues() only frees the q_storage
contents via dpaa2_queue_storage_free() — the dpaa2_queue struct itself
is never freed, leaking memory on every port close.

2. On allocation error: the fail: path frees the error queue's
q_storage but never frees the rx_err_vq struct itself, which was
separately allocated with rte_zmalloc(). This has been missing
since the error queue was first introduced.

Add the missing rte_free() calls and NULL assignments in both paths.

Also replace the DPAAX_RX_ERROR_QUEUE_FLAG check with a direct
priv->rx_err_vq NULL check, which is safe because rx_err_vq is
zero-initialized and only set when the flag is active. This avoids a
NULL dereference if rx_err_vq allocation itself fails and also
simplifies the cleanup in dpaa2_free_rx_tx_queues() for consistency.

As a defensive measure, also add a NULL guard to the
dpaa2_queue_storage_free() macro to prevent NULL pointer dereference
from callers in error paths.

Fixes: 46d02eeaaeb8 ("net/dpaa2: fix queue freeing")
Fixes: 4690a6114ff6 ("net/dpaa2: enable error queues optionally")
Cc: stable@dpdk.org

Signed-off-by: Maxime Leroy <maxime@leroys.fr>
---
drivers/bus/fslmc/portal/dpaa2_hw_pvt.h | 16 +++++++++-------
drivers/net/dpaa2/dpaa2_ethdev.c | 8 ++++++--
2 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/drivers/bus/fslmc/portal/dpaa2_hw_pvt.h b/drivers/bus/fslmc/portal/dpaa2_hw_pvt.h
index 10bc191645..e625a5c035 100644
--- a/drivers/bus/fslmc/portal/dpaa2_hw_pvt.h
+++ b/drivers/bus/fslmc/portal/dpaa2_hw_pvt.h
@@ -223,13 +223,15 @@ struct swp_active_dqs {

#define dpaa2_queue_storage_free(q, num) \
({ \
- int i; \
- \
- for (i = 0; i < (num); i++) { \
- if ((q)->q_storage[i]) { \
- dpaa2_free_dq_storage((q)->q_storage[i]); \
- rte_free((q)->q_storage[i]); \
- (q)->q_storage[i] = NULL; \
+ if (q) { \
+ int i; \
+ \
+ for (i = 0; i < (num); i++) { \
+ if ((q)->q_storage[i]) { \
+ dpaa2_free_dq_storage((q)->q_storage[i]); \
+ rte_free((q)->q_storage[i]); \
+ (q)->q_storage[i] = NULL; \
+ } \
} \
} \
})
diff --git a/drivers/net/dpaa2/dpaa2_ethdev.c b/drivers/net/dpaa2/dpaa2_ethdev.c
index cef819650b..eb8333458e 100644
--- a/drivers/net/dpaa2/dpaa2_ethdev.c
+++ b/drivers/net/dpaa2/dpaa2_ethdev.c
@@ -620,9 +620,11 @@ dpaa2_alloc_rx_tx_queues(struct rte_eth_dev *dev)
priv->rx_vq[i--] = NULL;
}

- if (priv->flags & DPAAX_RX_ERROR_QUEUE_FLAG) {
+ if (priv->rx_err_vq) {
dpaa2_q = priv->rx_err_vq;
dpaa2_queue_storage_free(dpaa2_q, RTE_MAX_LCORE);
+ rte_free(dpaa2_q);
+ priv->rx_err_vq = NULL;
}

rte_free(mc_q);
@@ -688,9 +690,11 @@ dpaa2_free_rx_tx_queues(struct rte_eth_dev *dev)
priv->tx_conf_vq[i] = NULL;
}
}
- if (priv->flags & DPAAX_RX_ERROR_QUEUE_FLAG) {
+ if (priv->rx_err_vq) {
dpaa2_q = priv->rx_err_vq;
dpaa2_queue_storage_free(dpaa2_q, RTE_MAX_LCORE);
+ rte_free(dpaa2_q);
+ priv->rx_err_vq = NULL;
}

/*free memory for all queues (RX+TX) */
--
2.43.0