[dpdk-stable] [PATCH v2] net/ixgbe: fix crash on detach

[dpdk-stable] [PATCH v2] net/ixgbe: fix crash on detach

[Pablo de Lara]

When detaching a port bound to ixgbe PMD, if the port
does not have any VFs, *vfinfo is not set and there is
a NULL dereference attempt, when calling
rte_eth_switch_domain_free(), which expects VFs to be used,
causing a segmentation fault.

Steps to reproduce:

./testpmd -- -i
testpmd> port stop all
testpmd> port close all
testpmd> port detach 0

Fixes: cf80ba6e2038 ("net/ixgbe: add support for representor ports")
Cc: stable@dpdk.org

Reported-by: Anatoly Burakov <anatoly.burakov@intel.com>
Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Tested-by: Anatoly Burakov <anatoly.burakov@intel.com>
Acked-by: Remy Horton <remy.horton@intel.com>
---

v2:
- Cc stable as this fix is targetting code that was introduced in
  previous release

 drivers/net/ixgbe/ixgbe_pf.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_pf.c b/drivers/net/ixgbe/ixgbe_pf.c
index 4d199c802..c381acf44 100644
--- a/drivers/net/ixgbe/ixgbe_pf.c
+++ b/drivers/net/ixgbe/ixgbe_pf.c
@@ -135,14 +135,14 @@ void ixgbe_pf_host_uninit(struct rte_eth_dev *eth_dev)
 	RTE_ETH_DEV_SRIOV(eth_dev).def_vmdq_idx = 0;
 	RTE_ETH_DEV_SRIOV(eth_dev).def_pool_q_idx = 0;
 
-	ret = rte_eth_switch_domain_free((*vfinfo)->switch_domain_id);
-	if (ret)
-		PMD_INIT_LOG(WARNING, "failed to free switch domain: %d", ret);
-
 	vf_num = dev_num_vf(eth_dev);
 	if (vf_num == 0)
 		return;
 
+	ret = rte_eth_switch_domain_free((*vfinfo)->switch_domain_id);
+	if (ret)
+		PMD_INIT_LOG(WARNING, "failed to free switch domain: %d", ret);
+
 	rte_free(*vfinfo);
 	*vfinfo = NULL;
 }
-- 
2.17.0

[dpdk-stable] [PATCH v3] net/ixgbe: fix crash on detach

[Pablo de Lara]

When detaching a port bound to ixgbe PMD, if the port
does not have any VFs, *vfinfo is not set and there is
a NULL dereference attempt, when calling
rte_eth_switch_domain_free(), which expects VFs to be used,
causing a segmentation fault.

Steps to reproduce:

./testpmd -- -i
testpmd> port stop all
testpmd> port close all
testpmd> port detach 0

Bugzilla ID: 57
Fixes: cf80ba6e2038 ("net/ixgbe: add support for representor ports")
Cc: stable@dpdk.org

Reported-by: Anatoly Burakov <anatoly.burakov@intel.com>
Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Tested-by: Anatoly Burakov <anatoly.burakov@intel.com>
Acked-by: Remy Horton <remy.horton@intel.com>
---

Changes in v3:
- Added Bugzilla ID

Changes in v2:
- CC'd stable list

 drivers/net/ixgbe/ixgbe_pf.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_pf.c b/drivers/net/ixgbe/ixgbe_pf.c
index 4d199c802..c381acf44 100644
--- a/drivers/net/ixgbe/ixgbe_pf.c
+++ b/drivers/net/ixgbe/ixgbe_pf.c
@@ -135,14 +135,14 @@ void ixgbe_pf_host_uninit(struct rte_eth_dev *eth_dev)
 	RTE_ETH_DEV_SRIOV(eth_dev).def_vmdq_idx = 0;
 	RTE_ETH_DEV_SRIOV(eth_dev).def_pool_q_idx = 0;
 
-	ret = rte_eth_switch_domain_free((*vfinfo)->switch_domain_id);
-	if (ret)
-		PMD_INIT_LOG(WARNING, "failed to free switch domain: %d", ret);
-
 	vf_num = dev_num_vf(eth_dev);
 	if (vf_num == 0)
 		return;
 
+	ret = rte_eth_switch_domain_free((*vfinfo)->switch_domain_id);
+	if (ret)
+		PMD_INIT_LOG(WARNING, "failed to free switch domain: %d", ret);
+
 	rte_free(*vfinfo);
 	*vfinfo = NULL;
 }
-- 
2.17.0

Re: [dpdk-stable] [dpdk-dev] [PATCH v3] net/ixgbe: fix crash on detach

[Zhang, Qi Z]

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Pablo de Lara
> Sent: Thursday, May 31, 2018 5:53 PM
> To: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Ananyev, Konstantin
> <konstantin.ananyev@intel.com>
> Cc: dev@dpdk.org; De Lara Guarch, Pablo <pablo.de.lara.guarch@intel.com>;
> stable@dpdk.org
> Subject: [dpdk-dev] [PATCH v3] net/ixgbe: fix crash on detach
> 
> When detaching a port bound to ixgbe PMD, if the port does not have any VFs,
> *vfinfo is not set and there is a NULL dereference attempt, when calling
> rte_eth_switch_domain_free(), which expects VFs to be used, causing a
> segmentation fault.
> 
> Steps to reproduce:
> 
> ./testpmd -- -i
> testpmd> port stop all
> testpmd> port close all
> testpmd> port detach 0
> 
> Bugzilla ID: 57
> Fixes: cf80ba6e2038 ("net/ixgbe: add support for representor ports")
> Cc: stable@dpdk.org
> 
> Reported-by: Anatoly Burakov <anatoly.burakov@intel.com>
> Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
> Tested-by: Anatoly Burakov <anatoly.burakov@intel.com>
> Acked-by: Remy Horton <remy.horton@intel.com>

Applied to dpdk-next-net-intel

Thanks!
Qi