Add safety to dummy_random in case of NULL context
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
diff --git a/programs/fuzz/common.c b/programs/fuzz/common.c
index e12ee3b..465a76e 100644
--- a/programs/fuzz/common.c
+++ b/programs/fuzz/common.c
@@ -60,8 +60,11 @@
size_t i;
#if defined(MBEDTLS_CTR_DRBG_C)
- //use mbedtls_ctr_drbg_random to find bugs in it
- ret = mbedtls_ctr_drbg_random(p_rng, output, output_len);
+ //mbedtls_ctr_drbg_random requires a valid mbedtls_ctr_drbg_context in p_rng
+ if( p_rng != NULL ) {
+ //use mbedtls_ctr_drbg_random to find bugs in it
+ ret = mbedtls_ctr_drbg_random(p_rng, output, output_len);
+ }
#else
(void) p_rng;
ret = 0;