The Coverity checker noted the following in
drivers/infiniband/hw/amso1100/c2_provider.c:
<-- snip -->
...
int c2_register_device(struct c2_dev *dev)
{
int ret;
int i;
/* Register pseudo network device */
dev->pseudo_netdev = c2_pseudo_netdev_init(dev);
if (dev->pseudo_netdev) {
ret = register_netdev(dev->pseudo_netdev);
if (ret) {
printk(KERN_ERR PFX
"Unable to register netdev, ret = %d\n", ret);
free_netdev(dev->pseudo_netdev);
return ret;
}
}
pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
strlcpy(dev->ibdev.name, "amso%d", IB_DEVICE_NAME_MAX);
dev->ibdev.owner = THIS_MODULE;
dev->ibdev.uverbs_cmd_mask =
(1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
(1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
(1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
(1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
(1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
(1ull << IB_USER_VERBS_CMD_REG_MR) |
(1ull << IB_USER_VERBS_CMD_DEREG_MR) |
(1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
(1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
(1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
(1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
(1ull << IB_USER_VERBS_CMD_CREATE_QP) |
(1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
(1ull << IB_USER_VERBS_CMD_POLL_CQ) |
(1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
(1ull << IB_USER_VERBS_CMD_POST_SEND) |
(1ull << IB_USER_VERBS_CMD_POST_RECV);
dev->ibdev.node_type = RDMA_NODE_RNIC;
memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
memcpy(&dev->ibdev.node_guid, dev->pseudo_netdev->dev_addr, 6);
... ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
<-- snip -->
Above there's an "if (dev->pseudo_netdev)" check, but here it's
dereferenced without a check.
It seems instead of the "if (dev->pseudo_netdev)", there should be some
kind of
if (!dev->pseudo_netdev)
return -ESOME_ERROR;
cu
Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
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