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-rw-r--r--lib/rhashtable.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index f3b82e0d417b..751630bbe409 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -961,6 +961,11 @@ int rhashtable_init(struct rhashtable *ht,
if (params->max_size)
ht->p.max_size = rounddown_pow_of_two(params->max_size);
+ /* Cap total entries at 2^31 to avoid nelems overflow. */
+ ht->max_elems = 1u << 31;
+ if (ht->p.max_size < ht->max_elems / 2)
+ ht->max_elems = ht->p.max_size * 2;
+
ht->p.min_size = max(ht->p.min_size, HASH_MIN_SIZE);
if (params->nelem_hint)