rhashtable: fix a memory leak in alloc_bucket_locks()

If vmalloc() was successful, do not attempt a kmalloc_array()

Fixes: 4cf0b354d92e ("rhashtable: avoid large lock-array allocations")
Reported-by: CAI Qian <caiqian@redhat.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Florian Westphal <fw@strlen.de>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Tested-by: CAI Qian <caiqian@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 3 deletions

diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index 5ba520b544d7..56054e541a0f 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -77,17 +77,18 @@ static int alloc_bucket_locks(struct rhashtable *ht, struct bucket_table *tbl,
         size = min_t(unsigned int, size, tbl->size >> 1);
 
         if (sizeof(spinlock_t) != 0) {
+                tbl->locks = NULL;
 #ifdef CONFIG_NUMA
                 if (size * sizeof(spinlock_t) > PAGE_SIZE &&
                     gfp == GFP_KERNEL)
                         tbl->locks = vmalloc(size * sizeof(spinlock_t));
-                else
 #endif
                 if (gfp != GFP_KERNEL)
                         gfp |= __GFP_NOWARN | __GFP_NORETRY;
 
-                tbl->locks = kmalloc_array(size, sizeof(spinlock_t),
-                                           gfp);
+                if (!tbl->locks)
+                        tbl->locks = kmalloc_array(size, sizeof(spinlock_t),
+                                                   gfp);
                 if (!tbl->locks)
                         return -ENOMEM;
                 for (i = 0; i < size; i++)