diff options
| author |   Jia-Ju Bai <baijiaju1990@163.com> | 2015-08-03 10:17:08 +0800 |
|---|---|---|
| committer |   Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2015-08-18 14:06:05 -0700 |
| commit | 9ad607b4a9cb365fbd8387b1250ec448e497223e (patch) | |
| tree | 5b1eb222a58b7f4c10c52379c10a6698adaab160 /drivers/net/ethernet/intel/e100.c | |
| parent | igb: Teardown SR-IOV before unregister_netdev() (diff) | |
| download | linux-dev-9ad607b4a9cb365fbd8387b1250ec448e497223e.tar.xz linux-dev-9ad607b4a9cb365fbd8387b1250ec448e497223e.zip | |
e100: Add a check after pci_pool_create to avoid null pointer dereference
The driver lacks the check of nic->cbs_pool after pci_pool_create
in e100_probe. When this function is failed, a null pointer dereference
occurs when pci_pool_alloc uses nic->cbs_pool in e100_alloc_cbs.
This patch adds a check and related error handling code to fix it.
Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/e100.c')
| -rw-r--r-- | drivers/net/ethernet/intel/e100.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/e100.c b/drivers/net/ethernet/intel/e100.c index d2657a412768..767c161735e3 100644 --- a/drivers/net/ethernet/intel/e100.c +++ b/drivers/net/ethernet/intel/e100.c @@ -2967,6 +2967,11 @@ static int e100_probe(struct pci_dev *pdev, const struct pci_device_id *ent) nic->params.cbs.max * sizeof(struct cb), sizeof(u32), 0); + if (!nic->cbs_pool) { + netif_err(nic, probe, nic->netdev, "Cannot create DMA pool, aborting\n"); + err = -ENOMEM; + goto err_out_pool; + } netif_info(nic, probe, nic->netdev, "addr 0x%llx, irq %d, MAC addr %pM\n", (unsigned long long)pci_resource_start(pdev, use_io ? 1 : 0), @@ -2974,6 +2979,8 @@ static int e100_probe(struct pci_dev *pdev, const struct pci_device_id *ent) return 0; +err_out_pool: + unregister_netdev(netdev); err_out_free: e100_free(nic); err_out_iounmap: |