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* [dpdk-dev] [PATCH] net/failsafe: fix crash on slave queue release
@ 2018-08-31 16:16 Andrew Rybchenko
  2018-09-19 15:14 ` Gaëtan Rivet
  0 siblings, 1 reply; 3+ messages in thread
From: Andrew Rybchenko @ 2018-08-31 16:16 UTC (permalink / raw)
  To: Gaetan Rivet; +Cc: dev, Igor Romanov, stable

From: Igor Romanov <igor.romanov@oktetlabs.ru>

Releasing a queue that is already released by slave may cause a
segmentation fault. For example, after a successfull device
configuration a queue is set up. Afterwards the device is reconfigured
with an invalid argument, forcing slaves to release the queues
(e.g. rte_eth_dev.data.tx_queues). Finally the failsafe's queues
are released. The queue release functions also try to release slaves'
queues using ETH(sdev)->data->tx_queues which is NULL at the time.

Add checks for NULL slaves' Tx and Rx queues before releasing them.

Fixes: a46f8d584eb8 ("net/failsafe: add fail-safe PMD")
Cc: stable@dpdk.org

Signed-off-by: Igor Romanov <igor.romanov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
---
 drivers/net/failsafe/failsafe_ops.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/net/failsafe/failsafe_ops.c b/drivers/net/failsafe/failsafe_ops.c
index 24e91c931..94b9769e7 100644
--- a/drivers/net/failsafe/failsafe_ops.c
+++ b/drivers/net/failsafe/failsafe_ops.c
@@ -309,9 +309,13 @@ fs_rx_queue_release(void *queue)
 	fs_lock(dev, 0);
 	if (rxq->event_fd > 0)
 		close(rxq->event_fd);
-	FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_ACTIVE)
-		SUBOPS(sdev, rx_queue_release)
-			(ETH(sdev)->data->rx_queues[rxq->qid]);
+	FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_ACTIVE) {
+		if (ETH(sdev)->data->rx_queues != NULL &&
+		    ETH(sdev)->data->rx_queues[rxq->qid] != NULL) {
+			SUBOPS(sdev, rx_queue_release)
+				(ETH(sdev)->data->rx_queues[rxq->qid]);
+		}
+	}
 	dev->data->rx_queues[rxq->qid] = NULL;
 	rte_free(rxq);
 	fs_unlock(dev, 0);
@@ -477,9 +481,13 @@ fs_tx_queue_release(void *queue)
 	txq = queue;
 	dev = txq->priv->dev;
 	fs_lock(dev, 0);
-	FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_ACTIVE)
-		SUBOPS(sdev, tx_queue_release)
-			(ETH(sdev)->data->tx_queues[txq->qid]);
+	FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_ACTIVE) {
+		if (ETH(sdev)->data->tx_queues != NULL &&
+		    ETH(sdev)->data->tx_queues[txq->qid] != NULL) {
+			SUBOPS(sdev, tx_queue_release)
+				(ETH(sdev)->data->tx_queues[txq->qid]);
+		}
+	}
 	dev->data->tx_queues[txq->qid] = NULL;
 	rte_free(txq);
 	fs_unlock(dev, 0);
-- 
2.17.1

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2018-09-21  0:05 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-08-31 16:16 [dpdk-dev] [PATCH] net/failsafe: fix crash on slave queue release Andrew Rybchenko
2018-09-19 15:14 ` Gaëtan Rivet
2018-09-21  0:05   ` [dpdk-dev] [dpdk-stable] " Ferruh Yigit

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