The driver lacks the check of nic->cbs_pool after pci_pool_create in e100_probe.
So when this function is failed, the null pointer dereference occurs when
pci_pool_alloc uses nic->cbs_pool in e100_alloc_cbs.
This patch fix this problem, and it has been tested in runtime.
Signed-off-by: Jia-Ju Bai<baijiaju1...@163.com>
---
drivers/net/ethernet/intel/e100.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/intel/e100.c
b/drivers/net/ethernet/intel/e100.c
index 781065e..ba1813f 100644
--- a/drivers/net/ethernet/intel/e100.c
+++ b/drivers/net/ethernet/intel/e100.c
@@ -2969,6 +2969,10 @@ 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) {
+ 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),
@@ -2976,6 +2980,8 @@ 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:
------------------------------------------------------------------------------
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