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-rw-r--r--crypto/ecdsa/ecs_lib.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/crypto/ecdsa/ecs_lib.c b/crypto/ecdsa/ecs_lib.c
index 2ebae3aa27d7..81082c972726 100644
--- a/crypto/ecdsa/ecs_lib.c
+++ b/crypto/ecdsa/ecs_lib.c
@@ -188,8 +188,15 @@ ECDSA_DATA *ecdsa_check(EC_KEY *key)
ecdsa_data = (ECDSA_DATA *)ecdsa_data_new();
if (ecdsa_data == NULL)
return NULL;
- EC_KEY_insert_key_method_data(key, (void *)ecdsa_data,
- ecdsa_data_dup, ecdsa_data_free, ecdsa_data_free);
+ data = EC_KEY_insert_key_method_data(key, (void *)ecdsa_data,
+ ecdsa_data_dup, ecdsa_data_free, ecdsa_data_free);
+ if (data != NULL)
+ {
+ /* Another thread raced us to install the key_method
+ * data and won. */
+ ecdsa_data_free(ecdsa_data);
+ ecdsa_data = (ECDSA_DATA *)data;
+ }
}
else
ecdsa_data = (ECDSA_DATA *)data;