3 files changed, 17 insertions, 0 deletions

diff --git a/net/rds/message.c b/net/rds/message.c
index a84545dae370..848cff45183b 100644
--- a/net/rds/message.c
+++ b/net/rds/message.c
@@ -224,6 +224,9 @@ struct scatterlist *rds_message_alloc_sgs(struct rds_message *rm, int nents)
         WARN_ON(rm->m_used_sgs + nents > rm->m_total_sgs);
         WARN_ON(!nents);
 
+        if (rm->m_used_sgs + nents > rm->m_total_sgs)
+                return NULL;
+
         sg_ret = &sg_first[rm->m_used_sgs];
         sg_init_table(sg_ret, nents);
         rm->m_used_sgs += nents;
@@ -246,6 +249,8 @@ struct rds_message *rds_message_map_pages(unsigned long *page_addrs, unsigned in
         rm->m_inc.i_hdr.h_len = cpu_to_be32(total_len);
         rm->data.op_nents = ceil(total_len, PAGE_SIZE);
         rm->data.op_sg = rds_message_alloc_sgs(rm, num_sgs);
+        if (!rm->data.op_sg)
+                return ERR_PTR(-ENOMEM);
 
         for (i = 0; i < rm->data.op_nents; ++i) {
                 sg_set_page(&rm->data.op_sg[i],
diff --git a/net/rds/rdma.c b/net/rds/rdma.c
index caa4d9866d92..8920f2a83327 100644
--- a/net/rds/rdma.c
+++ b/net/rds/rdma.c
@@ -607,6 +607,10 @@ int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm,
         op->op_recverr = rs->rs_recverr;
         WARN_ON(!nr_pages);
         op->op_sg = rds_message_alloc_sgs(rm, nr_pages);
+        if (!op->op_sg) {
+                ret = -ENOMEM;
+                goto out;
+        }
 
         if (op->op_notify || op->op_recverr) {
                 /* We allocate an uninitialized notifier here, because
@@ -807,6 +811,10 @@ int rds_cmsg_atomic(struct rds_sock *rs, struct rds_message *rm,
         rm->atomic.op_active = 1;
         rm->atomic.op_recverr = rs->rs_recverr;
         rm->atomic.op_sg = rds_message_alloc_sgs(rm, 1);
+        if (!rm->atomic.op_sg) {
+                ret = -ENOMEM;
+                goto err;
+        }
 
         /* verify 8 byte-aligned */
         if (args->local_addr & 0x7) {
diff --git a/net/rds/send.c b/net/rds/send.c
index 0bc9db17a87d..35b9c2e9caf1 100644
--- a/net/rds/send.c
+++ b/net/rds/send.c
@@ -973,6 +973,10 @@ int rds_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
         /* Attach data to the rm */
         if (payload_len) {
                 rm->data.op_sg = rds_message_alloc_sgs(rm, ceil(payload_len, PAGE_SIZE));
+                if (!rm->data.op_sg) {
+                        ret = -ENOMEM;
+                        goto out;
+                }
                 ret = rds_message_copy_from_user(rm, msg->msg_iov, payload_len);
                 if (ret)
                         goto out;