diff options
| author | Michael J. Ruhl <michael.j.ruhl@intel.com> | 2018-02-01 12:31:06 -0800 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2018-02-01 15:43:32 -0700 |
| commit | 2ff124d597c2df8696169ce0006fc974c49a4569 (patch) | |
| tree | c9a7474d1f06fbf0abd438f40255cf76214f92e3 /drivers/infiniband | |
| parent | 87daac68f77a3e21a1113f816e6a7be0b38bdde8 (diff) | |
| download | linux-2ff124d597c2df8696169ce0006fc974c49a4569.tar.bz2 | |
IB/core: Avoid a potential OOPs for an unused optional parameter
The ev_file is an optional parameter for CQ creation. If the parameter
is not passed, the ev_file pointer will be NULL. Using that pointer
to set the cq_context will result in an OOPs.
Verify that ev_file is not NULL before using.
Cc: <stable@vger.kernel.org> # 4.14.x
Fixes: 9ee79fce3642 ("IB/core: Add completion queue (cq) object actions")
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/core/uverbs_std_types.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/core/uverbs_std_types.c b/drivers/infiniband/core/uverbs_std_types.c index b571176babbe..cab0ac3556eb 100644 --- a/drivers/infiniband/core/uverbs_std_types.c +++ b/drivers/infiniband/core/uverbs_std_types.c @@ -316,7 +316,7 @@ static int uverbs_create_cq_handler(struct ib_device *ib_dev, cq->uobject = &obj->uobject; cq->comp_handler = ib_uverbs_comp_handler; cq->event_handler = ib_uverbs_cq_event_handler; - cq->cq_context = &ev_file->ev_queue; + cq->cq_context = ev_file ? &ev_file->ev_queue : NULL; obj->uobject.object = cq; obj->uobject.user_handle = user_handle; atomic_set(&cq->usecnt, 0); |