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SubjectRe: [PATCH 2/2] IB/iSER: handle iser_device allocation error gracefully
Date
"iser_device" allocation failure is "handled" with a BUG_ON() right
before dereferencing the NULL-pointer - fix this!

Signed-off-by: Arne Redlich <arne.redlich@xiranet.com>
---
drivers/infiniband/ulp/iser/iser_verbs.c | 13 +++++++++----
1 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c
index 1c0f968..cf70d15 100644
--- a/drivers/infiniband/ulp/iser/iser_verbs.c
+++ b/drivers/infiniband/ulp/iser/iser_verbs.c
@@ -243,7 +243,7 @@ struct iser_device *iser_device_find_by_ib_device(struct rdma_cm_id *cma_id)

list_for_each_entry(device, &ig.device_list, ig_list)
if (device->ib_device->node_guid == cma_id->device->node_guid)
- goto out;
+ goto inc_refcnt;

device = kzalloc(sizeof *device, GFP_KERNEL);
if (device == NULL)
@@ -258,9 +258,9 @@ struct iser_device *iser_device_find_by_ib_device(struct rdma_cm_id *cma_id)
}
list_add(&device->ig_list, &ig.device_list);

-out:
- BUG_ON(device == NULL);
+inc_refcnt:
device->refcount++;
+out:
mutex_unlock(&ig.device_list_mutex);
return device;
}
@@ -366,6 +366,12 @@ static void iser_addr_handler(struct rdma_cm_id *cma_id)
int ret;

device = iser_device_find_by_ib_device(cma_id);
+ if (!device) {
+ iser_err("device lookup/creation failed\n");
+ iser_connect_error(cma_id);
+ return;
+ }
+
ib_conn = (struct iser_conn *)cma_id->context;
ib_conn->device = device;

@@ -374,7 +380,6 @@ static void iser_addr_handler(struct rdma_cm_id *cma_id)
iser_err("resolve route failed: %d\n", ret);
iser_connect_error(cma_id);
}
- return;
}

static void iser_route_handler(struct rdma_cm_id *cma_id)
--
1.5.4.1


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