From dac3a2a0f54589b10a4cff2a99526804747089df Mon Sep 17 00:00:00 2001
From: Rahul Tank <rahul.tank@espressif.com>
Date: Mon, 30 May 2022 14:27:07 +0530
Subject: [PATCH] Added check to free keypair if already allocated to avoid
 memory leak

---
 nimble/host/src/ble_sm_alg.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/nimble/host/src/ble_sm_alg.c b/nimble/host/src/ble_sm_alg.c
index 177df5593..9917bb56c 100644
--- a/nimble/host/src/ble_sm_alg.c
+++ b/nimble/host/src/ble_sm_alg.c
@@ -642,6 +642,10 @@ mbedtls_gen_keypair(uint8_t *public_key, uint8_t *private_key)
 
     mbedtls_entropy_init(&entropy);
     mbedtls_ctr_drbg_init(&ctr_drbg);
+
+    /* Free the previously allocate keypair */
+    mbedtls_ecp_keypair_free(&keypair);
+
     mbedtls_ecp_keypair_init(&keypair);
 
     if (( rc = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
@@ -678,6 +682,11 @@ exit:
 
     return 0;
 }
+
+void mbedtls_free_keypair(void)
+{
+    mbedtls_ecp_keypair_free(&keypair);
+}
 #endif
 
 /**