[dpdk-dev] [PATCH] hash: fix wrong size memory calculation

[dpdk-dev] [PATCH] hash: fix wrong size memory calculation

[Pablo de Lara]

When calculating the size for the table which allocates
the keys, size was calculated wrongly from multiplying
two 32-bit variables, resulting on a 32-bit number,
before casting to 64-bit, so maximum size was 4G.

Fixes: 48a399119619 ("hash: replace with cuckoo hash implementation")

Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
---
 lib/librte_hash/rte_cuckoo_hash.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/librte_hash/rte_cuckoo_hash.c b/lib/librte_hash/rte_cuckoo_hash.c
index 4da859a..7019763 100644
--- a/lib/librte_hash/rte_cuckoo_hash.c
+++ b/lib/librte_hash/rte_cuckoo_hash.c
@@ -238,7 +238,7 @@ rte_hash_create(const struct rte_hash_parameters *params)
 	const uint32_t key_entry_size = sizeof(struct rte_hash_key) + params->key_len;
 
 	/* Store all keys and leave the first entry as a dummy entry for lookup_bulk */
-	const uint64_t key_tbl_size = key_entry_size * (params->entries + 1);
+	const uint64_t key_tbl_size = (uint64_t) key_entry_size * (params->entries + 1);
 
 	k = rte_zmalloc_socket(NULL, key_tbl_size,
 			RTE_CACHE_LINE_SIZE, params->socket_id);
-- 
2.4.2

Re: [dpdk-dev] [PATCH] hash: fix wrong size memory calculation

[Thomas Monjalon]

2015-08-31 14:30, Pablo de Lara:
> When calculating the size for the table which allocates
> the keys, size was calculated wrongly from multiplying
> two 32-bit variables, resulting on a 32-bit number,
> before casting to 64-bit, so maximum size was 4G.
> 
> Fixes: 48a399119619 ("hash: replace with cuckoo hash implementation")
> 
> Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>

Applied, thanks