Fix for ucma context uid=0, causing iWarp RDMA applications to fail in
connection establishment.
This is a new patch addressing the librdmacm segfault when
RDMA_CM_EVENT_ESTABLISHED event shows up with evt->id_priv = NULL
In the ucma_event_handler(), ctx->file->mut is moved up to prevent race
conditions and protect from assigning zero ucma ctx->uid to asynchronously
generated events.
Signed-off-by: Tatyana Nikolova <tatyana.e.nikol...@intel.com>
Signed-off-by: Sean Hefty <sean.he...@intel.com>
---
drivers/infiniband/core/ucma.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
index 8002ae6..88c50d2 100644
--- a/drivers/infiniband/core/ucma.c
+++ b/drivers/infiniband/core/ucma.c
@@ -267,6 +267,7 @@ static int ucma_event_handler(struct rdma_cm_id *cm_id,
if (!uevent)
return event->event == RDMA_CM_EVENT_CONNECT_REQUEST;
+ mutex_lock(&ctx->file->mut);
uevent->cm_id = cm_id;
ucma_set_event_context(ctx, event, uevent);
uevent->resp.event = event->event;
@@ -277,7 +278,6 @@ static int ucma_event_handler(struct rdma_cm_id *cm_id,
ucma_copy_conn_event(&uevent->resp.param.conn,
&event->param.conn);
- mutex_lock(&ctx->file->mut);
if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) {
if (!ctx->backlog) {
ret = -ENOMEM;
--
1.7.4.2
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