[PATCH] infiniband/qedr: Potential null ptr dereference of qp

[Aditya Pakki]

idr_find() may fail and return a NULL pointer. The fix checks the
return value of the function and returns an error in case of NULL.

Signed-off-by: Aditya Pakki <pakki...@umn.edu>
---
 drivers/infiniband/hw/qedr/qedr_iw_cm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/infiniband/hw/qedr/qedr_iw_cm.c 
b/drivers/infiniband/hw/qedr/qedr_iw_cm.c
index 505fa3648762..93b16237b767 100644
--- a/drivers/infiniband/hw/qedr/qedr_iw_cm.c
+++ b/drivers/infiniband/hw/qedr/qedr_iw_cm.c
@@ -492,6 +492,8 @@ int qedr_iw_connect(struct iw_cm_id *cm_id, struct 
iw_cm_conn_param *conn_param)
        int i;
 
        qp = idr_find(&dev->qpidr.idr, conn_param->qpn);
+       if (unlikely(!qp))
+               return -EINVAL;
 
        laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
        raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
-- 
2.17.1