kdfs: make free calls check for NULL.

[openssl.git] / providers / implementations / kdfs / sskdf.c

diff --git a/providers/implementations/kdfs/sskdf.c b/providers/implementations/kdfs/sskdf.c
index 4f69eec7f66ef8648e341e459a735e564e6ee6f9..2c4600d2058e0f758a240c40441822028ad4f578 100644 (file)
--- a/providers/implementations/kdfs/sskdf.c
+++ b/providers/implementations/kdfs/sskdf.c
@@ -315,8 +315,10 @@ static void sskdf_free(void *vctx)
 {
     KDF_SSKDF *ctx = (KDF_SSKDF *)vctx;
 
-    sskdf_reset(ctx);
-    OPENSSL_free(ctx);
+    if (ctx != NULL) {
+        sskdf_reset(ctx);
+        OPENSSL_free(ctx);
+    }
 }
 
 static int sskdf_set_buffer(unsigned char **out, size_t *out_len,