[dpdk-dev] [PATCH] rte_table: ensure prev bucket has a valid pointer

[Emmanuel Roullit]

Fixes: 43f15e28377f ("table: fix verification on hash bucket header alignment")

Signed-off-by: Emmanuel Roullit <emmanuel.roul...@gmail.com>
---
 lib/librte_table/rte_table_hash_key16.c | 7 +++++--
 lib/librte_table/rte_table_hash_key32.c | 7 +++++--
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/lib/librte_table/rte_table_hash_key16.c 
b/lib/librte_table/rte_table_hash_key16.c
index 08d4d77eb..9c04e7f5e 100644
--- a/lib/librte_table/rte_table_hash_key16.c
+++ b/lib/librte_table/rte_table_hash_key16.c
@@ -483,8 +483,11 @@ rte_table_hash_entry_add_key16_ext(
 
                bucket = (struct rte_bucket_4_16 *) &f->memory[(f->n_buckets +
                        bucket_index) * f->bucket_size];
-               bucket_prev->next = bucket;
-               bucket_prev->next_valid = 1;
+
+               if (bucket_prev) {
+                       bucket_prev->next = bucket;
+                       bucket_prev->next_valid = 1;
+               }
 
                bucket->signature[0] = signature;
                memcpy(bucket->key[0], key, f->key_size);
diff --git a/lib/librte_table/rte_table_hash_key32.c 
b/lib/librte_table/rte_table_hash_key32.c
index 161f6b7a7..27e221be9 100644
--- a/lib/librte_table/rte_table_hash_key32.c
+++ b/lib/librte_table/rte_table_hash_key32.c
@@ -471,8 +471,11 @@ rte_table_hash_entry_add_key32_ext(
                bucket = (struct rte_bucket_4_32 *)
                        &f->memory[(f->n_buckets + bucket_index) *
                        f->bucket_size];
-               bucket_prev->next = bucket;
-               bucket_prev->next_valid = 1;
+
+               if (bucket_prev) {
+                       bucket_prev->next = bucket;
+                       bucket_prev->next_valid = 1;
+               }
 
                bucket->signature[0] = signature;
                memcpy(bucket->key[0], key, f->key_size);
-- 
2.11.0