[dpdk-dev] [PATCH] net/i40e: fix using heap pointer after free

[dpdk-dev] [PATCH] net/i40e: fix using heap pointer after free

[dapengx.yu]

From: Dapeng Yu <dapengx.yu@intel.com>

The original code use a heap pointer after it is freed.

Fixes: 460d1679586e ("drivers/net: delete HW rings while freeing queues")
Cc: stable@dpdk.org

Signed-off-by: Dapeng Yu <dapengx.yu@intel.com>
---
 drivers/net/i40e/i40e_fdir.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/i40e/i40e_fdir.c b/drivers/net/i40e/i40e_fdir.c
index ac0e09bfdd..3983122af7 100644
--- a/drivers/net/i40e/i40e_fdir.c
+++ b/drivers/net/i40e/i40e_fdir.c
@@ -301,11 +301,11 @@ i40e_fdir_teardown(struct i40e_pf *pf)
 	if (err)
 		PMD_DRV_LOG(DEBUG, "Failed to do FDIR RX switch off");
 
-	i40e_dev_rx_queue_release(pf->fdir.rxq);
 	rte_eth_dma_zone_free(dev, "fdir_rx_ring", pf->fdir.rxq->queue_id);
+	i40e_dev_rx_queue_release(pf->fdir.rxq);
 	pf->fdir.rxq = NULL;
-	i40e_dev_tx_queue_release(pf->fdir.txq);
 	rte_eth_dma_zone_free(dev, "fdir_tx_ring", pf->fdir.txq->queue_id);
+	i40e_dev_tx_queue_release(pf->fdir.txq);
 	pf->fdir.txq = NULL;
 	i40e_vsi_release(vsi);
 	pf->fdir.fdir_vsi = NULL;
-- 
2.27.0

Re: [dpdk-dev] [PATCH] net/i40e: fix using heap pointer after free

[Zhang, Qi Z]

> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of dapengx.yu@intel.com
> Sent: Friday, June 4, 2021 10:02 AM
> To: Xing, Beilei <beilei.xing@intel.com>
> Cc: dev@dpdk.org; Yu, DapengX <dapengx.yu@intel.com>; stable@dpdk.org
> Subject: [dpdk-dev] [PATCH] net/i40e: fix using heap pointer after free
> 
> From: Dapeng Yu <dapengx.yu@intel.com>
> 
> The original code use a heap pointer after it is freed.
> 
> Fixes: 460d1679586e ("drivers/net: delete HW rings while freeing queues")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Dapeng Yu <dapengx.yu@intel.com>

Acked-by: Qi Zhang <qi.z.zhang@intel.com>

Applied to dpdk-next-net-intel.

Thanks
Qi