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-rw-r--r--net/rds/rdma.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/net/rds/rdma.c b/net/rds/rdma.c
index 1a41debca1ce..0df02c8a8533 100644
--- a/net/rds/rdma.c
+++ b/net/rds/rdma.c
@@ -502,6 +502,13 @@ static int rds_rdma_pages(struct rds_rdma_args *args)
return -EINVAL;
tot_pages += nr_pages;
+
+ /*
+ * nr_pages for one entry is limited to (UINT_MAX>>PAGE_SHIFT)+1,
+ * so tot_pages cannot overflow without first going negative.
+ */
+ if ((int)tot_pages < 0)
+ return -EINVAL;
}
return tot_pages;

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