RDMA/uverbs: Prevent leak of reserved field

commit f7a6cb7b38c6845b26aaa8bbdf519ff6e3090831 upstream.

initialize to zero the response structure to prevent
the leakage of "resp.reserved" field.

drivers/infiniband/core/uverbs_cmd.c:1178 ib_uverbs_resize_cq() warn:
	check that 'resp.reserved' doesn't leak information

Fixes: 33b9b3ee9709 ("IB: Add userspace support for resizing CQs")
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 465ac94..29c01fc 100644 (file)
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -1192,7 +1192,7 @@ ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
                            int out_len)
 {
        struct ib_uverbs_resize_cq      cmd;
-       struct ib_uverbs_resize_cq_resp resp;
+       struct ib_uverbs_resize_cq_resp resp = {};
        struct ib_udata                 udata;
        struct ib_cq                    *cq;
        int                             ret = -EINVAL;