IB/ehca: use correct destination for memcpy

Using an element of a struct as the address for the memcpy of the whole
struct may introduce a buffer overflow and does not help readability either
simply pass the real thing as first argument to memcpy.

Reported-by: Dan Carpenter <[email protected]>
Signed-off-by: Nicholas Mc Guire <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>

diff --git a/drivers/infiniband/hw/ehca/ehca_mcast.c b/drivers/infiniband/hw/ehca/ehca_mcast.c
index 120aedf9f989a7a34839046a360dd9ad53816d64..cec1815329245cfa6573f39ce3f44f628175fea7 100644 (file)
--- a/drivers/infiniband/hw/ehca/ehca_mcast.c
+++ b/drivers/infiniband/hw/ehca/ehca_mcast.c
@@ -77,7 +77,7 @@ int ehca_attach_mcast(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
                return -EINVAL;
        }
 
-       memcpy(&my_gid.raw, gid->raw, sizeof(union ib_gid));
+       memcpy(&my_gid, gid->raw, sizeof(union ib_gid));
 
        subnet_prefix = be64_to_cpu(my_gid.global.subnet_prefix);
        interface_id = be64_to_cpu(my_gid.global.interface_id);
@@ -114,7 +114,7 @@ int ehca_detach_mcast(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
                return -EINVAL;
        }
 
-       memcpy(&my_gid.raw, gid->raw, sizeof(union ib_gid));
+       memcpy(&my_gid, gid->raw, sizeof(union ib_gid));
 
        subnet_prefix = be64_to_cpu(my_gid.global.subnet_prefix);
        interface_id = be64_to_cpu(my_gid.global.interface_id);