[PATCH 5.4 13/96] PCI/IOV: Fix memory leak in pci_iov_add_virtfn()

From: Greg Kroah-Hartman
Date: Thu Feb 13 2020 - 10:29:59 EST


From: Navid Emamdoost <navid.emamdoost@xxxxxxxxx>

commit 8c386cc817878588195dde38e919aa6ba9409d58 upstream.

In the implementation of pci_iov_add_virtfn() the allocated virtfn is
leaked if pci_setup_device() fails. The error handling is not calling
pci_stop_and_remove_bus_device(). Change the goto label to failed2.

Fixes: 156c55325d30 ("PCI: Check for pci_setup_device() failure in pci_iov_add_virtfn()")
Link: https://lore.kernel.org/r/20191125195255.23740-1-navid.emamdoost@xxxxxxxxx
Signed-off-by: Navid Emamdoost <navid.emamdoost@xxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/pci/iov.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)

--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -187,10 +187,10 @@ int pci_iov_add_virtfn(struct pci_dev *d
sprintf(buf, "virtfn%u", id);
rc = sysfs_create_link(&dev->dev.kobj, &virtfn->dev.kobj, buf);
if (rc)
- goto failed2;
+ goto failed1;
rc = sysfs_create_link(&virtfn->dev.kobj, &dev->dev.kobj, "physfn");
if (rc)
- goto failed3;
+ goto failed2;

kobject_uevent(&virtfn->dev.kobj, KOBJ_CHANGE);

@@ -198,11 +198,10 @@ int pci_iov_add_virtfn(struct pci_dev *d

return 0;

-failed3:
- sysfs_remove_link(&dev->dev.kobj, buf);
failed2:
- pci_stop_and_remove_bus_device(virtfn);
+ sysfs_remove_link(&dev->dev.kobj, buf);
failed1:
+ pci_stop_and_remove_bus_device(virtfn);
pci_dev_put(dev);
failed0:
virtfn_remove_bus(dev->bus, bus);