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IB/counters: Always initialize the port counter object 

Port counter objects should be initialized even if alloc_stats is
unsupported, otherwise QP bind operations in user space can trigger a NULL
pointer deference if they try to bind QP on RDMA device which doesn't
support counters.

Fixes: f34a55e497 ("RDMA/core: Get sum value of all counters when perform a sysfs stat read")
Link: https://lore.kernel.org/r/20190723065733.4899-11-leon@kernel.org
Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Mark Zhang <markz@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Parav Pandit 2019-07-23 09:57:33 +03:00 committed by Jason Gunthorpe
parent a379d1ce32
commit d191152f43
1 changed files with 4 additions and 4 deletions
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8
drivers/infiniband/core/counters.c
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@ -597,7 +597,7 @@ void rdma_counter_init(struct ib_device *dev)
struct rdma_port_counter *port_counter;
u32 port;
if (!dev->ops.alloc_hw_stats || !dev->port_data)
if (!dev->port_data)
return;
rdma_for_each_port(dev, port) {
@ -605,6 +605,9 @@ void rdma_counter_init(struct ib_device *dev)
port_counter->mode.mode = RDMA_COUNTER_MODE_NONE;
mutex_init(&port_counter->lock);
if (!dev->ops.alloc_hw_stats)
continue;
port_counter->hstats = dev->ops.alloc_hw_stats(dev, port);
if (!port_counter->hstats)
goto fail;
@ -627,9 +630,6 @@ void rdma_counter_release(struct ib_device *dev)
struct rdma_port_counter *port_counter;
u32 port;
if (!dev->ops.alloc_hw_stats)
return;
rdma_for_each_port(dev, port) {
port_counter = &dev->port_data[port].port_counter;
kfree(port_counter->hstats);