[net-next 2/9] ixgbe: Fix memory leak when SR-IOV VFs are direct assigned
From: Jeff Kirsher <hidden>
Date: 2012-07-20 01:24:14
Subsystem:
intel ethernet drivers, networking drivers, the rest · Maintainers:
Tony Nguyen, Przemek Kitszel, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Alexander Duyck <redacted> The VF driver had a memory leak that would occur if VFs were assigned to a guest. The amount of leak would vary with the number of VFs but could max out at about 14K per PF. To reproduce the leak all you would need to do is enable all the VFs on the first PF. Then start a loop of loading and unloading the driver with max_vfs=63 for the first port. Signed-off-by: Alexander Duyck <redacted> Tested-by: Phil Schmitt <redacted> Tested-by: Sibai Li <redacted> Signed-off-by: Jeff Kirsher <redacted> --- drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
index c7d831d..4f22668 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c@@ -208,6 +208,17 @@ void ixgbe_disable_sriov(struct ixgbe_adapter *adapter) u32 vmdctl; int i; + /* set num VFs to 0 to prevent access to vfinfo */ + adapter->num_vfs = 0; + + /* free VF control structures */ + kfree(adapter->vfinfo); + adapter->vfinfo = NULL; + + /* free macvlan list */ + kfree(adapter->mv_list); + adapter->mv_list = NULL; + #ifdef CONFIG_PCI_IOV /* disable iov and allow time for transactions to clear */ pci_disable_sriov(adapter->pdev);
@@ -238,11 +249,7 @@ void ixgbe_disable_sriov(struct ixgbe_adapter *adapter) if (adapter->vfinfo[i].vfdev) pci_dev_put(adapter->vfinfo[i].vfdev); } - kfree(adapter->vfinfo); - kfree(adapter->mv_list); - adapter->vfinfo = NULL; - adapter->num_vfs = 0; adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED; }
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1.7.10.4