From 9950acf945f55222385d85489617e1d81e45fe34 Mon Sep 17 00:00:00 2001 From: Leon Romanovsky Date: Sun, 29 Oct 2017 21:34:35 +0200 Subject: [PATCH] RDMA/cxgb4: Protect from possible dereference Smatch tool reports the following error: drivers/infiniband/hw/cxgb4/qp.c:1886 c4iw_create_qp() error: we previously assumed 'ucontext' could be null (see line 1804) Cc: Steve Wise Signed-off-by: Leon Romanovsky Reviewed-by: Steve Wise Signed-off-by: Doug Ledford --- drivers/infiniband/hw/cxgb4/qp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c index 57b23e33eb8b..4b3267358dff 100644 --- a/drivers/infiniband/hw/cxgb4/qp.c +++ b/drivers/infiniband/hw/cxgb4/qp.c @@ -1843,7 +1843,7 @@ struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs, if (ret) goto err_destroy_qp; - if (udata) { + if (udata && ucontext) { sq_key_mm = kmalloc(sizeof(*sq_key_mm), GFP_KERNEL); if (!sq_key_mm) { ret = -ENOMEM; -- 2.30.2