diff options
| author | Jiri Pirko <jiri@mellanox.com> | 2018-02-01 14:21:15 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-02-01 17:50:52 +0300 |
| commit | a83165f00f16c0e0ef5b7cec3cbd0d4788699265 (patch) | |
| tree | 14abea04ec1c7e69c927273f938c5fb0a5dbb4e9 /drivers/net | |
| parent | 0ba987181028ab41cdc68fa91b74c98d97b93ff3 (diff) | |
| download | linux-a83165f00f16c0e0ef5b7cec3cbd0d4788699265.tar.xz | |
rocker: fix possible null pointer dereference in rocker_router_fib_event_work
Currently, rocker user may experience following null pointer
derefence bug:
[ 3.062141] BUG: unable to handle kernel NULL pointer dereference at 00000000000000d0
[ 3.065163] IP: rocker_router_fib_event_work+0x36/0x110 [rocker]
The problem is uninitialized rocker->wops pointer that is initialized
only with the first initialized port. So move the port initialization
before registering the fib events.
Fixes: 936bd486564a ("rocker: use FIB notifications instead of switchdev calls")
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/rocker/rocker_main.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/net/ethernet/rocker/rocker_main.c b/drivers/net/ethernet/rocker/rocker_main.c index fc8f8bdf6579..056cb6093630 100644 --- a/drivers/net/ethernet/rocker/rocker_main.c +++ b/drivers/net/ethernet/rocker/rocker_main.c @@ -2902,6 +2902,12 @@ static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id) goto err_alloc_ordered_workqueue; } + err = rocker_probe_ports(rocker); + if (err) { + dev_err(&pdev->dev, "failed to probe ports\n"); + goto err_probe_ports; + } + /* Only FIBs pointing to our own netdevs are programmed into * the device, so no need to pass a callback. */ @@ -2918,22 +2924,16 @@ static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id) rocker->hw.id = rocker_read64(rocker, SWITCH_ID); - err = rocker_probe_ports(rocker); - if (err) { - dev_err(&pdev->dev, "failed to probe ports\n"); - goto err_probe_ports; - } - dev_info(&pdev->dev, "Rocker switch with id %*phN\n", (int)sizeof(rocker->hw.id), &rocker->hw.id); return 0; -err_probe_ports: - unregister_switchdev_notifier(&rocker_switchdev_notifier); err_register_switchdev_notifier: unregister_fib_notifier(&rocker->fib_nb); err_register_fib_notifier: + rocker_remove_ports(rocker); +err_probe_ports: destroy_workqueue(rocker->rocker_owq); err_alloc_ordered_workqueue: free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker); @@ -2961,9 +2961,9 @@ static void rocker_remove(struct pci_dev *pdev) { struct rocker *rocker = pci_get_drvdata(pdev); - rocker_remove_ports(rocker); unregister_switchdev_notifier(&rocker_switchdev_notifier); unregister_fib_notifier(&rocker->fib_nb); + rocker_remove_ports(rocker); rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET); destroy_workqueue(rocker->rocker_owq); free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker); |