DPDK patches and discussions
 help / color / Atom feed
* [dpdk-dev] [PATCH] ethdev: fix secondary process change share memory
@ 2020-01-09 12:27 Fang TongHao
  2020-01-10  7:30 ` Jeff Guo
  2020-01-13  5:03 ` [dpdk-dev] [PATCH v2] Fixes: ethdev: secondary process change shared memory Fang TongHao
  0 siblings, 2 replies; 17+ messages in thread
From: Fang TongHao @ 2020-01-09 12:27 UTC (permalink / raw)
  To: thomas, ferruh.yigit, arybchenko
  Cc: cunming.liang, jia.guo, dev, stable, Fang TongHao

Hi all,I am from Sangfor Tech.I found a bug when using DPDK in
multiprocess scenario.The secondary process enters
"rte_eth_dev_pci_copy_info" function when initializing.Then it
sets the value of struct "rte_eth_dev_data.dev_flags" to zero,
but this struct is shared by primary process and secondary
process, and the value change is unexpected by primary process.
This may cause very serious damage.I think
the secondary process should not enter "rte_eth_dev_pci_copy_info"
function or changes the value of struct "rte_eth_dev_data.dev_flags"
in shared memory.
I fixed this bug by adding an if-statement to forbid the secondary
process changing the above-mentioned value.
Thansk, All.

Signed-off-by: Fang TongHao <fangtonghao@sangfor.com.cn>
---
 lib/librte_ethdev/rte_ethdev_pci.h | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/lib/librte_ethdev/rte_ethdev_pci.h b/lib/librte_ethdev/rte_ethdev_pci.h
index ccdbb46ec..916de8a14 100644
--- a/lib/librte_ethdev/rte_ethdev_pci.h
+++ b/lib/librte_ethdev/rte_ethdev_pci.h
@@ -59,15 +59,16 @@ rte_eth_copy_pci_info(struct rte_eth_dev *eth_dev,
 	}
 
 	eth_dev->intr_handle = &pci_dev->intr_handle;
-
-	eth_dev->data->dev_flags = 0;
-	if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
-		eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
-	if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_RMV)
-		eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_RMV;
-
-	eth_dev->data->kdrv = pci_dev->kdrv;
-	eth_dev->data->numa_node = pci_dev->device.numa_node;
+	if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
+		eth_dev->data->dev_flags = 0;
+		if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
+			eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
+		if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_RMV)
+			eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_RMV;
+
+		eth_dev->data->kdrv = pci_dev->kdrv;
+		eth_dev->data->numa_node = pci_dev->device.numa_node;
+	}
 }
 
 static inline int
-- 
2.24.1.windows.2


^ permalink raw reply	[flat|nested] 17+ messages in thread

end of thread, back to index

Thread overview: 17+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-01-09 12:27 [dpdk-dev] [PATCH] ethdev: fix secondary process change share memory Fang TongHao
2020-01-10  7:30 ` Jeff Guo
2020-01-10  7:53   ` 方统浩50450
2020-01-13  5:03 ` [dpdk-dev] [PATCH v2] Fixes: ethdev: secondary process change shared memory Fang TongHao
2020-01-14 14:45   ` Ferruh Yigit
2020-01-15  6:49     ` 方统浩50450
2020-01-15 18:35       ` Ferruh Yigit
2020-01-15 20:43         ` Thomas Monjalon
2020-01-16  7:43           ` Andrew Rybchenko
2020-01-16  9:04             ` Ferruh Yigit
2020-01-16 11:35               ` 方统浩50450
2020-01-16 12:18                 ` Ferruh Yigit
2020-01-17  2:11                   ` 方统浩50450
2020-01-16  9:00           ` Ferruh Yigit
2020-01-17  2:08   ` [dpdk-dev] [PATCH v3] " Fang TongHao
2020-01-17  8:33     ` Andrew Rybchenko
2020-01-17 17:58       ` Ferruh Yigit

DPDK patches and discussions

Archives are clonable:
	git clone --mirror http://inbox.dpdk.org/dev/0 dev/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 dev dev/ http://inbox.dpdk.org/dev \
		dev@dpdk.org
	public-inbox-index dev


Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.dev


AGPL code for this site: git clone https://public-inbox.org/ public-inbox