From 4a45b7d4ece0e6dc425e9f66fa8b501b72d846db Mon Sep 17 00:00:00 2001
From: Bryan O'Sullivan <bos@pathscale.com>
Date: Sat, 1 Jul 2006 04:35:55 -0700
Subject: [PATCH] [PATCH] IB/ipath: don't allow resources to be created with
 illegal values

Signed-off-by: Robert Walsh <robert.walsh@qlogic.com>
Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com>
Cc: "Michael S. Tsirkin" <mst@mellanox.co.il>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 drivers/infiniband/hw/ipath/ipath_mr.c    |  5 +++++
 drivers/infiniband/hw/ipath/ipath_qp.c    |  8 ++++++++
 drivers/infiniband/hw/ipath/ipath_verbs.c | 11 +++++++++++
 3 files changed, 24 insertions(+)

diff --git a/drivers/infiniband/hw/ipath/ipath_mr.c b/drivers/infiniband/hw/ipath/ipath_mr.c
index 30936769ab3a..4ac31a5da330 100644
--- a/drivers/infiniband/hw/ipath/ipath_mr.c
+++ b/drivers/infiniband/hw/ipath/ipath_mr.c
@@ -170,6 +170,11 @@ struct ib_mr *ipath_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
 	int n, m, i;
 	struct ib_mr *ret;
 
+	if (region->length == 0) {
+		ret = ERR_PTR(-EINVAL);
+		goto bail;
+	}
+
 	n = 0;
 	list_for_each_entry(chunk, &region->chunk_list, list)
 		n += chunk->nents;
diff --git a/drivers/infiniband/hw/ipath/ipath_qp.c b/drivers/infiniband/hw/ipath/ipath_qp.c
index 47271be65b0f..e6fc4c02823f 100644
--- a/drivers/infiniband/hw/ipath/ipath_qp.c
+++ b/drivers/infiniband/hw/ipath/ipath_qp.c
@@ -667,6 +667,14 @@ struct ib_qp *ipath_create_qp(struct ib_pd *ibpd,
 		goto bail;
 	}
 
+	if (init_attr->cap.max_send_sge +
+	    init_attr->cap.max_recv_sge +
+	    init_attr->cap.max_send_wr +
+	    init_attr->cap.max_recv_wr == 0) {
+		ret = ERR_PTR(-EINVAL);
+		goto bail;
+	}
+
 	switch (init_attr->qp_type) {
 	case IB_QPT_UC:
 	case IB_QPT_RC:
diff --git a/drivers/infiniband/hw/ipath/ipath_verbs.c b/drivers/infiniband/hw/ipath/ipath_verbs.c
index 6af5402fe447..18375e831744 100644
--- a/drivers/infiniband/hw/ipath/ipath_verbs.c
+++ b/drivers/infiniband/hw/ipath/ipath_verbs.c
@@ -792,6 +792,17 @@ static struct ib_ah *ipath_create_ah(struct ib_pd *pd,
 		goto bail;
 	}
 
+	if (ah_attr->dlid == 0) {
+		ret = ERR_PTR(-EINVAL);
+		goto bail;
+	}
+
+	if (ah_attr->port_num != 1 ||
+	    ah_attr->port_num > pd->device->phys_port_cnt) {
+		ret = ERR_PTR(-EINVAL);
+		goto bail;
+	}
+
 	ah = kmalloc(sizeof *ah, GFP_ATOMIC);
 	if (!ah) {
 		ret = ERR_PTR(-ENOMEM);