diff options
| author | Roland Dreier <rolandd@cisco.com> | 2005-10-30 18:50:04 +0100 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2005-10-31 16:10:32 +0100 |
| commit | 7162a3e0db34e914a8bc5bf74bbae0b386310cf8 (patch) | |
| tree | ffd7eba03f29dd2932dd32ac4adc2921bde7644b /drivers/infiniband | |
| parent | [IPoIB] use spin_trylock_irqsave() (diff) | |
| download | linux-7162a3e0db34e914a8bc5bf74bbae0b386310cf8.tar.xz linux-7162a3e0db34e914a8bc5bf74bbae0b386310cf8.zip | |
[IB] uverbs: Avoid NULL pointer deref on CQ async event
Userspace CQs that have no completion event channel attached end up
with their cq_context set to NULL. However, asynchronous events like
"CQ overrun" can still occur on such CQs, so add a uverbs_file member
to struct ib_ucq_object that we can follow to deliver these events.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/core/uverbs.h | 1 | ||||
| -rw-r--r-- | drivers/infiniband/core/uverbs_cmd.c | 1 | ||||
| -rw-r--r-- | drivers/infiniband/core/uverbs_main.c | 9 |
3 files changed, 5 insertions, 6 deletions
diff --git a/drivers/infiniband/core/uverbs.h b/drivers/infiniband/core/uverbs.h index 031cdf3c066d..ecb830127865 100644 --- a/drivers/infiniband/core/uverbs.h +++ b/drivers/infiniband/core/uverbs.h @@ -113,6 +113,7 @@ struct ib_uevent_object { struct ib_ucq_object { struct ib_uobject uobject; + struct ib_uverbs_file *uverbs_file; struct list_head comp_list; struct list_head async_list; u32 comp_events_reported; diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index 8c89abc8c764..63a74151c60b 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -602,6 +602,7 @@ ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file, uobj->uobject.user_handle = cmd.user_handle; uobj->uobject.context = file->ucontext; + uobj->uverbs_file = file; uobj->comp_events_reported = 0; uobj->async_events_reported = 0; INIT_LIST_HEAD(&uobj->comp_list); diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c index 0eb38f479b39..e58a7b278a00 100644 --- a/drivers/infiniband/core/uverbs_main.c +++ b/drivers/infiniband/core/uverbs_main.c @@ -442,13 +442,10 @@ static void ib_uverbs_async_handler(struct ib_uverbs_file *file, void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr) { - struct ib_uverbs_event_file *ev_file = context_ptr; - struct ib_ucq_object *uobj; + struct ib_ucq_object *uobj = container_of(event->element.cq->uobject, + struct ib_ucq_object, uobject); - uobj = container_of(event->element.cq->uobject, - struct ib_ucq_object, uobject); - - ib_uverbs_async_handler(ev_file->uverbs_file, uobj->uobject.user_handle, + ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle, event->event, &uobj->async_list, &uobj->async_events_reported); |